Information
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Patent Grant
-
6406176
-
Patent Number
6,406,176
-
Date Filed
Monday, September 11, 200023 years ago
-
Date Issued
Tuesday, June 18, 200222 years ago
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Inventors
-
Original Assignees
-
Examiners
Agents
-
CPC
-
US Classifications
-
International Classifications
-
Abstract
A chronograph timepiece has a barrel mounted for undergoing rotation and a front train wheel for undergoing rotation in accordance with rotation of the barrel. A second counter intermediate wheel undergoes rotation in accordance with rotation of the front train wheel. A second counting wheel undergoes rotation in accordance with rotation of the second counter intermediate wheel in a chronograph measurement mode. A chronograph second display member displays a measurement result corresponding to an elapsed period of time in accordance with rotation of the second counting wheel. A minute counting train wheel undergoes rotation in accordance with rotation of the second counting wheel. A chronograph minute display member displays a measurement result corresponding to an elapsed period of time in accordance with rotation of the minute counting train wheel. At least one hour counting train wheel undergoes rotation in accordance with rotation of the barrel complete in the chronograph measurement mode. A chronograph hour display member displays a measurement result corresponding to an elapsed period of time in accordance with rotation of the hour counting train wheel.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a chronograph time piece, particularly to a chronograph time piece for measuring “hour”, “minute” and “second” and displaying respective results of measurement by a chronograph hour hand, a chronograph minute hand and a chronograph second hand.
2. Background Information
In reference to
FIG. 32
, according to a conventional chronograph time piece, a barrel complete
110
rotates a front wheel train
312
. A mainspring (not illustrated) is arranged in the barrel complete
110
and constitutes a power source of the chronograph time piece. A barrel pinion
912
is attached to the barrel complete
110
via a barrel complete slip mechanism
910
. An hour counter intermediate wheel
914
is integrated to rotate by rotation of the barrel pinion
912
. An hour counting gear
916
is integrated to rotate by rotation of the hour counter intermediate wheel
914
. An hour counting wheel stem
920
is attached to the hour counting gear
916
via an hour counting slip mechanism
918
and by a chronograph hour hand
128
attached to the hour counting wheel stem
920
, there is displayed a result of measurement of an elapse time period of “hour” such as an elapse of 1 hour.
A second counting train wheel
316
is integrated to rotate by rotation of the front train wheel
312
. A second counting wheel stem
934
is connected to the second counting train wheel
316
via a second counting slip mechanism
932
. By a chronograph second hand
118
attached to the second counting wheel stem
934
, there is displayed a result of measurement of an elapse time period of “second” such as an elapse of 1 second.
A minute counting wheel train
940
is integrated to rotate by rotation of the second counting wheel train
316
. A minute counting wheel stem
944
is connected to the minute counting wheel train
940
via a minute counting slip mechanism
942
. By a chronograph minute hand
124
attached to the minute counting stem
944
, there is displayed a result of measurement of an elapse time period of “minute” such as an elapse of 1 minute. Transmission of rotation from the second counting wheel train
316
to the minute counting wheel train
322
is constituted to carry out via a pivoting wheel (not illustrated).
According to such a conventional chronograph time piece, the hour counting slip mechanism
918
, the second counting slip mechanism
932
and the minute counting slip mechanism
942
are constituted to include clutch springs. Further, by operating the clutch springs, operation of the counting wheel trains is constituted to control.
Further, according to the conventional chronograph time piece, in pushing a button for starting/stopping the chronograph time piece, there is used an operating lever operated by the button. Further, a line spring is used for positioning the operating lever and by bending a portion of the operating lever, the line spring is hooked to the bent portion.
In zeroing the chronograph hands by pushing a reset button, a hammer is operated by a plate spring.
Further, according to the conventional chronograph time piece, there is provided a cam subjected to operation of a yoke for controlling to start and stop operation and zeroing of the chronograph and the cam is constituted to control various functions of the chronograph.
For example, there is disclosed a constitution of a conventional chronograph in Japanese Patent Laid-Open No. 9463/1975 and Japanese Patent Laid-Open No. 9464/1975.
However, the conventional chronograph timepiece has the following problems:
(1) In integrating a chronograph time piece, a mechanism constituting the chronograph time piece must be adjusted finely.
(2) An hour counting slip mechanism, a second counting slip mechanism and a minute counting slip mechanism are constituted to include clutch springs and therefore, a number of parts constituting the counting mechanisms is large and structure of the time piece is complicated.
(3) Further, the mechanisms including the clutch springs are used and accordingly, a thickness of the time piece is thickened by a thickness of the springs.
In order to resolve such conventional problems, objects of the present invention reside in the following points.
(1) To provide a chronograph time piece capable of being integrated easily with no need of adjusting parts constituting counting mechanisms when integrating the chronograph time piece.
(2) To provide a chronograph time piece having a small number of parts constituting counting mechanisms.
(3) To provide a chronograph time piece in which counting mechanisms are operated with certainty.
(4) To realize a small-sized and thin chronograph time piece by thinly constituting counting train wheels.
SUMMARY OF THE INVENTION
In order to resolve the above-described problems, a chronograph time piece according to the invention is provided with a front train wheel rotating based on rotation of a barrel complete and a second counter intermediate wheel rotating based on rotation of the front wheel train. In a chronograph measurement mode, a second counting wheel rotates based on rotation of the second counter intermediate wheel and a chronograph second display member displays a result of measurement of an elapse time period of second. A minute counting train wheel rotates based on rotation of the second counting wheel and a chronograph minute display member displays a result of measurement of an elapse time period of minute.
The chronograph time piece according to the invention includes at least one hour counting train wheel provided to rotate based on rotation of the barrel complete in the chronograph measurement mode and a chronograph hour display member for displaying a result of measurement of an elapse time period of hour based on rotation of the hour counting train wheels.
By constituting in this way, a number of parts of the chronograph time piece can be reduced and the second counting wheel, the minute counting train wheel and the hour counting train wheel can be operated efficiently.
Further, it is preferable according to the chronograph time piece of the invention that the hour counting train wheels include an hour counting slip mechanism constituted such that one of train wheels constituting the hour counting train wheels can slip relative to other one thereof.
Further, the hour counting train wheels of the chronograph time piece according to the invention include a first hour counting train wheel rotating based on rotation of the barrel complete. It is preferable to include a second hour counting train wheel rotating based on rotation of the first hour counting train wheel in the chronograph measurement mode, and an hour counting slip mechanism constituted such that when chronograph measurement is not executed, rotation of the first hour counting train wheel is not transmitted to the second hour counting train wheel and in the chronograph measurement mode, the rotation of the first hour counting train wheel is transmitted to the second hour counting train wheel.
Further, it is preferable according to the chronograph time piece of the invention to include a center wheel & pinion provided to rotate based on the rotation of the barrel complete, a third wheel & pinion provided to rotate based on rotation of the center wheel & pinion, a second wheel provided to rotate based on rotation of the third wheel & pinion, a second display member rotating based on rotation of the second wheel for displaying second, a minute transmission pinion provided to rotate based on the rotation of the center wheel & pinion, a minute drive wheel provided to rotate based on rotation of the minute transmission pinion, a minute display member rotating based on rotation of the minute drive wheel for displaying minute, an hour wheel provided to rotate based on the rotation of the minute transmission pinion, and an hour display member rotating based on rotation of the hour wheel for displaying hour.
Further, according to the invention, there is provided a chronograph time piece characterized in that in a chronograph time piece capable of measuring elapse time periods of second, minute and hour in a chronograph measurement mode, said chronograph time piece comprising a main plate constituting a base plate of the chronograph time piece, a second counting wheel for measuring the elapse time period of second based on rotation of a barrel complete in the chronograph measurement mode, a minute counting train wheel for measuring the elapse time period of minute based on the rotation of the barrel complete in the chronograph measurement mode, hour counting train wheels for measuring the elapse time period of hour based on the rotation of the barrel complete in the chronograph measurement mode, a chronograph second display member for displaying a result of measurement of the elapse time period of second by rotating the second counting wheel, a chronograph minute display member for displaying a result of measurement of the elapse time period of minute by rotating the minute counting train wheel, a chronograph hour display member for displaying a result of measurement of the elapse time period of hour by rotating the hour counting wheel, second and minute counting coupling means for starting or stopping operation of the chronograph second display member and the chronograph minute display member, and hour counting coupling means for starting or stopping operation of the chronograph hour display member.
By constituting in this way, operation of start and stop of chronograph measurement of the chronograph time piece can be executed with certainty.
Further, it is preferable according to the chronograph time piece of the invention to include chronograph second and minute zeroing means provided on a front side of the main plate for simultaneously returning the chronograph second display member and the chronograph minute display member to zero, and chronograph hour zeroing means provided on a back side of the main plate for returning the chronograph hour display member to zero.
By constituting in this way, operation of zeroing the chronograph second hand, the chronograph minute hand and the chronograph hour hand of the chronograph time piece can be executed with certainty and swiftly.
Further, it is preferable according to the chronograph time piece of the invention that a rotational center of the chronograph second display member is arranged substantially at a center of the chronograph time piece, wherein a rotational center of the chronograph hour display member is arranged on a straight line connecting the center of the chronograph time piece and a 6 o'clock indicator of a dial or a vicinity thereof, and wherein a rotational center of the chronograph minute display member is arranged on a straight line connecting the center of the chronograph time piece and a 12 o'clock indicator of the dial or a vicinity thereof.
By constituting in this way, there can be provided the chronograph time piece which is small-sized, thin and easy to see.
Further, it is preferable according to the chronograph time piece of the invention that a second display member for displaying second, a rotational center of the second display member is arranged on a straight line connecting the center of the chronograph time piece and a 9 o'clock indicator of the dial.
By constituting in this way, there can be provided the chronograph time piece capable of executing second display which is easy to see.
Further, it is preferable according to the chronograph time piece of the invention that a button for operating the second and minute counting coupling means and the hour counting coupling means is arranged substantially in a 2 o'clock direction of the chronograph time piece.
Further, it is preferable according to the chronograph time piece of the invention that a button for operating the chronograph second and minute zeroing means and the chronograph hour zeroing means is arranged substantially in a 4 o'clock direction of the chronograph time piece.
By constituting this way, operation of start and stop of the chronograph time piece is facilitated, further, outlook design of the chronograph time piece is improved.
Further, it is preferable that the hour counting train wheels include an hour counting transmission wheel (A) rotating based on the rotation of the barrel complete, an hour counting transmission wheel (C) rotating based on rotation of the hour counting transmission wheel (A), an hour counting transmission wheel (B) cooperating with the hour counting transmission wheel (C) via a slip mechanism, an hour counting wheel rotating based on rotation of the hour counting transmission wheel (B) in the chronograph measurement mode, and the chronograph hour display member rotating based on rotation of the hour counting wheel for displaying the result of measurement of the elapse time period of hour in the chronograph measurement mode.
By constituting in this way, the hour counting train wheel can be made small-sized and thin.
Further, it is preferable in the chronograph time piece of the invention that the second counting wheel includes a minute driving finger for intermittently rotating the minute counting train wheel and the minute counting train wheel includes a minute counter intermediate wheel rotated by the minute driving finger, and a minute counting wheel rotating based on rotation of the minute counter intermediate wheel.
By constituting in this way, the minute counting train wheel can be made small-sized and thin.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is an outline partial sectional view showing a coupling portion of a chronograph mechanism (second counting wheel—second counter intermediate wheel—second wheel) in a state in which the chronograph mechanism is not operated according to an embodiment of a chronograph time piece of the invention.
FIG. 2
is an outline partial sectional view showing a minute counting train wheel (minute counter intermediate wheel—minute counting wheel) according to an embodiment of a chronograph time piece of the invention.
FIG. 3
is an outline partial sectional view showing a front wheel train, an escapement apparatus and a speed control apparatus according to an embodiment of a chronograph time piece of the invention.
FIG. 4
is an outline partial sectional view showing a portion of a minute transmission pinion according to an embodiment of a chronograph time piece of the invention.
FIG. 5
is an outline partial plane view showing the front wheel train, the escapement apparatus and the speed control apparatus according to the embodiment of the chronograph time piece of the invention.
FIG. 6
is a functional block diagram showing a train wheel constitution according to an embodiment of a chronograph time piece of the invention.
FIG. 7
is an outline partial plane view showing a portion of a coupling portion of a chronograph mechanism (second counting wheel—second counter intermediate wheel) in a state in which the chronograph mechanism is not operated according to an embodiment of the chronograph time piece of the invention.
FIG. 8
is an enlarged plane view of a second counting wheel according to an embodiment of a chronograph time piece of the invention.
FIG. 9
is an enlarged front view of the second counting wheel according to the embodiment of the chronograph time piece of the invention.
FIG. 10
is an outline partial sectional view showing an hour counting train wheel (hour counting transmission wheel—hour counting wheel) according to an embodiment of the chronograph time piece of the invention.
FIG. 11
is an outline partial plane view showing the hour counting train wheel (hour counting transmission wheel—hour counting wheel) according to the embodiment of the chronograph time piece of the invention.
FIG. 12
is an enlarged plane view showing an hour counting transmission wheel (C) according to the embodiment of the chronograph time piece of the invention.
FIG. 13
is a functional block diagram showing a train wheel constitution according to an embodiment of a chronograph time piece of the invention.
FIG. 14
is an outline partial sectional view showing a coupling portion of a chronograph mechanism in a state in which the chronograph mechanism is operated according to an embodiment of a chronograph time piece of the invention.
FIG. 15
is an outline partial enlarged plane view showing the coupling portion of the chronograph mechanism in the state in which the chronograph mechanism is operated according to the embodiment of the chronograph time piece of the invention.
FIG. 16
is a functional block diagram showing a constitution of a coupling mechanism in a state in which the chronograph mechanism is not operated according to an embodiment of a chronograph time piece of the invention.
FIG. 17
is an outline plane view showing a front side of a movement in a state in which the chronograph mechanism is not operated according to the embodiment of the chronograph time piece of the invention.
FIG. 18
is an outline partial sectional view showing an hour coupling lever, an hour coupling operation lever and an hour coupling lever operation lever operating pin according to an embodiment of a chronograph time piece of the invention.
FIG. 19
is an outline partial plane view showing a back side of the movement in a state in which the chronograph mechanism is not operated according to the embodiment of the chronograph time piece of the invention.
FIG. 20
is an outline partial plane view showing the front side of the movement in a state in which the chronograph mechanism is started according to the embodiment of the chronograph time piece of the invention.
FIG. 21
is an outline partial plane view showing the back side of the movement in the state in which the chronograph mechanism is started according to the embodiment of the chronograph time piece of the invention.
FIG. 22
is an outline partial plane view showing an hour counting train wheel in the state in which the chronograph mechanism is started according to the embodiment of the chronograph time piece of the invention.
FIG. 23
is an outline plane view showing the front side of the movement in a state in which the chronograph mechanism is stopped according to the embodiment of the chronograph time piece of the invention.
FIG. 24
is an outline partial plane view showing the back side of the movement in the state in which the chronograph mechanism is stopped according to the embodiment of the chronograph time piece of the invention.
FIG. 25
is a functional block diagram showing a constitution of a reset mechanism according to an embodiment of a chronograph time piece of the invention.
FIG. 26
is an outline plane view showing the front side of the movement in a state in which the chronograph mechanism is reset according to an embodiment of a chronograph time piece of the invention.
FIG. 27
is an outline partial plane view showing the back side of the movement in the state in which the chronograph mechanism is reset according to the embodiment of the chronograph time piece of the invention.
FIG. 28
is an outline partial plane view showing the hour counting train wheel in the state in which operation of the chronograph mechanism is reset according to the embodiment of the chronograph time piece of the invention.
FIG. 29
is a plane view showing an outlook of a chronograph time piece in the state in which the chronograph mechanism is not operated according to the embodiment of the chronograph time piece of the invention.
FIG. 30
is a plane view showing the outlook of the chronograph time piece in the state in which the chronograph mechanism is started according to the embodiment of the chronograph time piece of the invention.
FIG. 31
is a plane view showing the outlook of the chronograph time piece in the state in which operation of the chronograph mechanism is reset according to the embodiment of the chronograph time piece of the invention.
FIG. 32
is a functional block diagram of a conventional chronograph time piece.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
An explanation will be given of embodiments according to the invention in reference to the drawings as follows.
Further, in order to make clear the explanation, in the respective drawings, there is omitted a description of a structure of a portion which is inconsiderably related to the constitution of the invention. Therefore, there is omitted an explanation with regard to a switch apparatus, a hand setting apparatus, an automatic winding apparatus, a hand winding apparatus, a calendar apparatus, a calendar correcting apparatus and so on which can utilize structures similar to those in a conventional chronograph time piece.
(1) Constitutions of a front train wheel and a counting train wheel
(1-1) State in which a chronograph mechanism is not operated
In reference to FIG.
1
through
FIG. 5
, a movement
100
(machine body) of a chronograph time piece according to the invention is provided with a main plate
102
, a center wheel & pinion bridge
120
and a third wheel & pinion bridge
122
.
In both sides of the main plate
102
, a side having a dial
104
is referred to as “back side” of the movement and a side opposed to the side having the dial
104
is referred to as “front side” of the movement. A train wheel integrated to the “front side” of the movement is referred to as “front train wheel” and a wheel train integrated to the “back side” of the movement is referred to as “back wheel train”.
A dial bridge ring
106
is arranged between the main plate
102
and the dial
104
. The dial bridge ring
106
receives a back face of the dial
104
.
An outer peripheral portion of a front face of the dial
104
is normally provided with numerals from
1
to
12
or abbreviated characters corresponding thereto. Therefore, respective directions along the outer peripheral portion of the time piece can be expressed by using the numerals.
For example, in the case of a wrist watch,
upper direction and upper side of the wrist watch are respectively referred to as “12 o'clock direction” and “12 o'clock side”,
right direction and right side of the wrist watch are respectively referred to as “3 o'clock direction” and “3 o'clock side”,
lower direction and lower side of the wrist watch are respectively referred to as “6 o'clock direction” and “6 o'clock side”,
left direction and left side of the wrist watch are respectively referred to as “9 o'clock direction” and “9 o'clock side”.
Similarly,
direction and position in correspondence with 2 o'clock indicator of the dial are referred to as “2 o'clock direction” and “2 o'clock position”,
direction and position in correspondence with 4 o'clock indicator of the dial are referred to as “4 o'clock direction” and “4 o'clock position”.
For example, in
FIG. 5
, there are shown “12 o'clock direction”, “3 o'clock direction”, “6 o'clock direction” and “9 o'clock direction”. In this case, a winding stem
108
is arranged in “3 o'clock direction” of the movement.
In reference to FIG.
3
through
FIG. 6
, a barrel complete
110
is rotatably integrated to the third wheel & pinion bridge
122
and the main plate
102
. A mainspring (not illustrated) provided in the barrel complete
110
constitutes a power source of the chronograph time piece. A center wheel & pinion
130
is provided to rotate based on rotation of the barrel complete
110
. A minute transmission pinion
114
is provided to rotate based on rotation of the center wheel & pinion
130
. A minute drive wheel
132
is provided to rotate based on rotation of the minute transmission pinion
114
. According to the structure, the minute transmission pinion
114
constitutes an idler. A minute hand
134
attached to the minute drive wheel
132
is constituted to display “minute”.
In reference to
FIG. 3
, a third wheel & pinion
136
is provided to rotate based on rotation of the center wheel & pinion
130
. The third wheel & pinion
136
is rotatably supported by the third wheel & pinion bridge
122
and the main plate
102
. A second wheel
154
is provided to rotate based on rotation of the third wheel & pinion
136
. The second wheel
154
is rotatably supported by the third wheel & pinion bridge
122
and the main plate
102
. The second wheel
154
is provided to rotate by one rotation per minute. A second hand
156
attached to the second wheel
154
is constituted to display “second”. A rotational center of the second wheel
154
is different from a rotational center of the minute wheel
132
. That is, the second hand
156
constitutes a so-to-speak “small second hand”.
A balance with hairspring
140
constitutes a speed control apparatus of the time piece and a pallet fork
142
and an escape wheel & pinion
144
constitute an escapement apparatus of the time piece. Rotation of the second wheel
154
is controlled by the balance with hairspring
140
, the pallet fork
142
and the escape wheel & pinion
144
. The minute drive wheel
132
is provided to rotate by one rotation per hour.
In reference to
FIG. 4
, a minute wheel
146
is provided to rotate based on rotation of the minute drive wheel
132
. An hour wheel
148
is provided to rotate by one rotation per
12
hours based on rotation of the minute wheel
146
. A gear portion
148
a
of the hour wheel
148
is arranged between the main plate
102
and a date indicator holder
272
. An hour hand
150
attached to the hour wheel
148
is constituted to display “hour”. According to the constitution of the invention, the rotational center of the minute drive wheel
132
is the same as a rotational center of the hour wheel
148
.
In reference to
FIG. 5
, a rotational center of the barrel complete
110
is disposed between “3 o'clock direction” and “6 o'clock direction” of the movement. A rotational center of the balance with hairspring
140
is disposed between “9 o'clock direction” and “12 o'clock direction” of the movement. The rotational center of the second wheel
154
is disposed substantially in “9 o'clock direction” of the movement. A rotational center of the center wheel & pinion
130
, a rotational center of the minute drive wheel
132
and a rotational center of the third wheel & pinion
136
are disposed between “6 o'clock direction” and “9 o'clock direction” of the movement.
In reference to
FIG. 1
, in a state in which a chronograph mechanism is not operated, a second counter intermediate wheel
212
is rotatably integrated to a coupling lever
442
and the main plate
102
. The second counter intermediate wheel
212
is provided with a second counter intermediate pinion
212
a
and a second counting transmission pinion
212
b.
The intermediate second counter intermediate pinion
212
a
is in mesh with the second wheel
154
. The second counter intermediate wheel
212
is provided to rotate based on rotation of the second wheel
154
.
A second counting wheel
214
is rotatably integrated to a chronograph bridge
202
and the center wheel & pinion bridge
120
. A rotational center of the second counting wheel
214
is the same as the rotational center of the minute drive wheel
132
and the hour wheel
148
. A dial washer
170
is integrated between a large diameter portion “g” of the second counting wheel
214
and the center wheel & pinion bridge
120
to push the second counting wheel
214
to the chronograph bridge
202
. By using the dial washer
170
, operation of a chronograph second hand
118
can be stabilized in rotating the second chronograph wheel
214
.
In reference to FIG.
1
and
FIG. 7
, in the state in which the chronograph mechanism is not operated, the coupling lever
442
is moved to rotate in a direction of an arrow mark
442
u
centering on a rotational center
442
t
such that the chronograph mechanism is not operated. As a result, the second chronograph transmission pinion
212
b
is constituted not to be in mesh with the second counting wheel
214
.
In contrast thereto, in the state of operating the chronograph mechanism, as mentioned later, the coupling lever
442
is moved to rotate in a direction of an arrow mark
442
v
centering on a rotational center
442
t
such that the chronograph mechanism is operated. As a result, the second counting transmission pinion
212
b
is constituted to be in mesh with the second counting wheel
214
. In such a state in which the second chronograph transmission pinion
212
b
and the second counting wheel
214
are in mesh with each other, the second counting wheel
214
is constituted to rotate by one rotation per minute.
The chronograph second hand
118
is attached to the second counting wheel
214
and is constituted to display a result of measurement of an elapse time period of second. The chronograph second hand
118
is a chronograph second display member and may be a time piece hand or may be a mode of hand or foot of a character, flower, star or the like.
When the chronograph time piece according to the invention is constituted by an automatic winding time piece, an oscillating weight (not illustrated) is rotatably integrated to the chronograph bridge
202
. The automatic winding time piece may be constituted to wind a mainspring (not illustrated) via an automatic winding mechanism (not illustrated) by rotating the oscillating weight.
A second heart cam
220
is fixed to the second counting wheel
214
and is constituted to rotate integrally with the second counting wheel
214
.
As shown by
FIG. 1
, in the state in which the chronograph mechanism is not operated, the coupling lever
442
positions the second counting transmission pinion
212
b
such that the second counting transmission pinion
212
b
is separated from the second counting wheel
214
.
In reference to
FIG. 2
, a minute counter intermediate wheel
258
is rotatably integrated to the chronograph bridge
202
and the third wheel & pinion bridge
122
. A minute driving finger
256
is fixed to the second counting wheel
214
.
In reference to FIG.
8
and
FIG. 9
, the second counting wheel
214
is constituted to be provided with a second counting gear
214
a,
a second counting stem
214
b,
the second heart cam
220
and the second driving finger
256
. The second driving finger
256
is constituted by an elastic material to provide spring performance. A minute driving finger
256
a
is provided to the minute driving finger
256
and is brought into contact with a gear portion of the second counter intermediate wheel
258
.
When the second counting wheel
214
is rotated by one rotation, the minute driving finger
256
feeds the gear portion of the minute counter intermediate wheel
258
to thereby rotate the minute counter intermediate wheel
258
by an amount of one tooth.
A minute counting wheel
260
is rotatably integrated to the chronograph bridge
202
and the main plate
102
. The minute counting wheel
260
is constituted to rotate based on rotation of the minute counter intermediate wheel
258
. A minute jumper
264
sets rotation of the minute counting wheel
260
by elastic force. A minute heart cam
262
is fixed to the minute counting wheel
260
.
A minute chronograph hand
124
is attached to the minute counting wheel
260
and is constituted to display a result of measurement of an elapse time period of, for example, “minute” such as “1 minute”.
The minute chronograph hand
124
is a minute chronograph display member and may be a time piece hand or may be a mode of a circular disk, hand or foot of a character, flower, star or the like.
In reference to FIG.
10
and
FIG. 11
, an hour counting transmission wheel (A)
246
is rotatably integrated to the main a plate
102
and the third wheel & pinion bridge
122
and is constituted to rotate based on rotation of the barrel complete
110
. An upper guide shaft portion of the hour counter intermediate wheel (A)
246
may be constituted to be guided by the third wheel & pinion bridge
122
or guided by the chronograph bridge
202
.
An hour counting transmission wheel (B)
244
is provided with a gear portion
244
a,
a guide shaft portion
244
b
and a fitting portion
244
c.
According to the hour counting transmission wheel (B)
244
, the gear portion
244
a
is arranged on the dial side of the main plate
102
and the guide shaft portion
244
b
is rotatably integrated to the main plate
102
. An hour counting transmission wheel (C)
242
is integrated to the fitting portion
244
c
of the hour counting transmission wheel (B)
244
.
In reference to
FIG. 12
, the hour counting transmission wheel (C)
242
is provided with an elastically deformable spring portion
242
a,
a contact portion
242
b
and a guide portion
242
c.
The contact portion
242
b
is provided at a front end side portion of the spring portion
242
a.
The contact portion
242
b
and the guide portion
242
c
are integrated to the fitting portion
244
c
of the hour counting transmission wheel (B)
244
. Therefore, the hour counting transmission wheel (C)
242
can slip relative to the hour counting transmission wheel (B)
244
when predetermined slip torque is exceeded. According to the embodiment of the invention, the slip torque is constituted to be, for example, about 0.2 g·cm.
According to the constitution, by rotating the barrel complete
110
, the hour counting transmission wheel (A)
246
is rotated and by rotating the hour counting transmission wheel (A)
246
, the hour counting transmission wheel (C)
242
and the hour counting transmission wheel (B)
244
are integrally rotated.
An hour counting wheel
250
is rotatably provided to the date indicator maintaining plate
272
and is constituted to rotate based on rotation of the hour counting transmission wheel (B)
244
. The hour counting wheel
250
is provided with an hour counting gear
250
a,
an hour counting stem
250
b
and an hour heart cam
252
, and the hour chronograph stem
250
b
and an hour heart cam
252
are constituted to be able to rotate integrally.
In
FIG. 11
, there are shown “12 o'clock direction”, “3 o'clock direction”, “6 o'clock direction” and “9 o'clock direction” of the movement.
A rotational center of the hour counting wheel
250
is disposed substantially in “6 o'clock direction” of the movement. A switch apparatus
290
is disposed between “3 o'clock direction” and “12 o'clock direction” of the movement. The switch apparatus
290
includes a setting lever, a yoke and a setting lever holder and the like.
An hour chronograph hand
128
is attached to the hour counting stem
250
b
and is constituted to display a result of measurement of an elapse time period of, for example, “hour” such as “1 hour” when the chronograph mechanism is operated.
The hour chronograph hand
128
is an hour chronograph display member and may be a time piece hand or may be a mode of a circular disk, hand or foot of a character, flower, star or the like.
When the chronograph time piece according to the invention is constituted as a time piece with calendar, a date indicator (not illustrated) is rotatably integrated to the main plate
102
. According to such a constitution, display of “date” can be carried out by date characters printed on the date indicator. The date indicator is operated by a calendar feed mechanism (not illustrated) based on rotation of the front train wheel (divided from barrel complete).
In reference to
FIG. 13
, according to the chronograph time piece of the invention explained above, the front train wheel
312
is rotated by rotation of the barrel complete
110
. The front train wheel
312
includes the center wheel & pinion
130
, the minute transmission pinion
114
, the minute drive wheel
132
, the third wheel & pinion
136
and the second wheel
154
. The second counter intermediate wheel
212
is rotated by rotation of the front train wheel
312
. In the state in which the chronograph mechanism is not operated, the second counter intermediate wheel
212
is not in mesh with the second counting wheel
214
.
In the state in which the chronograph mechanism is operated, the second counter intermediate wheel
212
is in mesh with the second counting wheel
214
. Therefore, by the chronograph second hand
118
attached with the second counting wheel
214
, there can be displayed a result of measurement of “second” of the chronograph.
A minute counting train wheel
322
is rotated by rotation of the second counting wheel
214
. The minute counting train wheel
322
includes the minute counter intermediate wheel
258
and the minute counting wheel
260
. Therefore, by the chronograph minute hand
124
attached to the minute counting wheel
260
, there can be displayed a result of measurement of “minute” of the chronograph.
A first hour counting train wheel
332
is rotated by rotation of the barrel complete
110
. The first hour counting train wheel
332
includes the hour counting transmission wheel (A)
246
and the hour counting transmission wheel (C)
242
. An hour counting slipping mechanism
334
is provided between the first hour counting train wheel
332
and a second hour counting train wheel
336
. The hour counting slip mechanism
334
is constituted by the contact portion
242
b
and the guide portion
242
c
of the hour counter intermediate transmission wheel (C)
242
and the fitting portion
244
c
of the hour counter intermediate transmission wheel (B)
244
.
The second hour counting train wheel
336
includes the hour counter intermediate transmission wheel (B)
244
and the hour counting wheel
250
. The second hour counting train wheel
336
is rotated by rotation of the first hour counting train wheel
332
. Therefore, by the chronograph hour hand
128
attached to the hour counting wheel
250
, there can be displayed a result of measurement of “hour” of the chronograph.
When the second hour counting train wheel
336
is set, by slip action of the hour counting slip mechanism
334
, the first hour counting train wheel
332
is rotated while slipping relative to the second hour counting train wheel
336
.
(1-2) State in which the chronograph mechanism is operated
In reference to FIG.
14
and
FIG. 15
, in the state in which the chronograph mechanism is operated in the chronograph time piece according to the invention, the coupling lever
442
is moved to rotate in the direction of the arrow mark
442
v
centering on the rotational center
442
t
such that the chronograph mechanism is operated. As a result, the second counting transmission pinion
212
b
is constituted to be in mesh with the second counting wheel
214
. In the state in which the second counting transmission pinion
212
b
and the second counting wheel
214
are in mesh with each other, the second counting wheel
214
is constituted to rotate by one rotation per minute.
A guide frame
442
d
is provided to the coupling lever
442
. An upper frame
442
e
is attached to the guide frame
442
d.
The upper frame
442
e
guides rotatably an upper shaft portion of the second counter intermediate wheel
212
. By bringing an outer peripheral portion
442
f
of the guide frame
442
d
into contact with a contact portion
202
d
of the chronograph bridge
202
, rotation of the coupling lever
442
in the direction of the arrow mark
442
v
is set. Therefore, by the constitution, the state in which the second counting transmission pinion
212
b
and the second counting wheel
214
are in mesh with each other can be maintained with certainty.
The chronograph second hand
118
is attached to the second counting wheel
214
and is constituted to display a result of measurement of an elapse time period of second.
By the constitution explained above, according to the chronograph time piece of the invention, the chronograph second hand
118
constituting the chronograph second display member, displays the result of measurement of the elapse time period of “second”, the chronograph minute hand
124
constituting the chronograph minute display member, displays the result of measurement of the elapse time period of “minute” and the chronograph hour hand
128
constituting the chronograph hour display member, displays the result of measurement of the elapse time period of “hour”.
(2) Structure and operation of a chronograph operating mechanism
(2-1) Constitutions of respective parts for operating chronograph measurement
An explanation will be given of the structure of a chronograph operating mechanism on the front side of the movement
100
according to an embodiment of a chronograph time piece of the invention in reference to FIG.
17
and FIG.
18
.
In 2 o'clock direction of the movement, a start/stop button
830
is provided and by pushing the start/stop button in a direction designated by an arrow mark
410
, an operating lever
414
is constituted to be able to move.
Further, in 4 o'clock direction of the movement, a reset button
840
is provided and by pushing the reset button
840
in a direction designated by an arrow mark
412
, an hour hammer operating lever
510
is constituted to be able to move.
Here, according to the specification, for convenience of explanation, in a plane view, when a set screw for setting a member is illustrated and a rotational center of the member or a pin constituting a guide cannot be illustrated, a center position of the set screw is indicated by a cross in the drawing and a reference notation of the pin is attached to the cross to thereby display the position of the pin.
The operating lever
414
is provided to be movable by being guided by an operating lever guide pin
416
(the center position is indicated by
416
in FIG.
17
).
An operating lever spring
418
urges to push the operating lever
414
to the start/stop button
830
. Therefore, after pushing the start/stop button
830
, when the finger is detached from the start/stop button
830
, by spring force of the operating lever spring
418
, the operating lever
414
moves toward an outer side of the movement and the start/stop button
830
returns to the original position.
Similar operation is applicable also to the reset button
840
by using a hammer operating lever spring
522
and after pushing the reset button
840
, when the finger is detached from the reset button
840
, by spring force of the hammer operating lever spring
522
, the hammer operating lever
520
moves toward the outer side of the movement and the reset button
840
returns to the original position.
An operating cam
420
is rotatably provided with drive teeth
422
and ratchet teeth
424
. In the case of the ratchet teeth
424
, a number of teeth is 16. In the case of the drive teeth
422
, a number of teeth is 8 which is a half of the number of teeth of the ratchet teeth
424
. Therefore, when the ratchet teeth
424
are fed by 1 pitch, the drive teeth
422
are fed by a half pitch. Viewing a portion in correspondence with an outer periphery of the drive teeth
422
, every time of feeding the ratchet teeth
424
by 1 pitch, peak portions
424
t
and valley portions
424
u
of the drive teeth
422
are rotated to dispose alternately.
So far as the number of teeth of the ratchet teeth
424
is twice as much as a number of teeth of the drive teeth
422
, the number of teeth of the ratchet teeth
424
may not be 16. However, the number of teeth of the ratchet teeth
424
is an even number.
There is provided an operating cam jumper
426
having a spring portion and a setting portion
426
a
sets the ratchet teeth
424
and determines a position of the operating cam
420
with regard to the rotational direction. Therefore, by the ratchet teeth
424
and the operating cam jumper
426
, the operating cam
420
is rotated by every 360/16 degree and is positioned at the position with certainty.
A hammer setting lever
430
is rotatably provided centering on a hammer setting lever rotation guide pin
428
(center position is designated by
428
in FIG.
17
). A setting portion
430
a
of the hammer setting lever
430
is disposed between 2 teeth of the drive teeth
422
.
A hammer
432
is rotatably provided centering on the operating lever guide pin
416
(center position is indicated by
416
in FIG.
17
). A hammer spring
434
urges the hammer
432
such that the hammer
432
is rotated in the clockwise direction. A minute zeroing portion
432
a
of the hammer
432
is brought into contact with the minute heart cam
262
of the minute counting wheel
260
and zeros the minute heart cam
262
. Therefore, under the state, the chronograph minute hand
124
indicates “zero position”.
A minute jumper
264
is provided with a setting portion
264
a
and the setting portion
264
a
sets a gear portion of the minute chronograph wheel
260
. Therefore, a position of the minute chronograph wheel
260
in the rotational direction is set by the minute jumper
264
.
A second zeroing operating portion
432
b
of the hammer
432
is brought into contact with the second heart cam
220
of the second chronograph wheel
214
to thereby return the second heart cam
220
to zero. Therefore, under the state, the chronograph second hand
118
indicates “zero position”.
A stop lever
440
is rotatably provided centering on a stop lever rotation guide pin
438
(center position is indicated by
438
in FIG.
17
). The stop lever
440
is provided with a second counting wheel contact portion
440
a,
an hour coupling lever pin operating portion
440
b,
a coupling lever contact portion
440
c
and a setting portion
440
d.
The setting portion
440
d
of the stop lever
440
is positioned between 2 teeth of the drive teeth
422
.
There is provided a coupling lever spring
444
having a stop lever spring portion
444
a
and a coupling lever spring portion
444
b.
The coupling lever spring portion
444
b
urges the stop lever
440
in the counterclockwise direction and the second counting wheel contact portion
440
a
is brought into contact with a gear of the second counting wheel
214
.
The coupling lever
442
is rotatably provided centering on a coupling lever rotation guide pin
446
(center position is indicated by
446
in FIG.
17
). As described above, the guide frame
442
d
is provided to the coupling lever
442
and the upper frame
442
e
is attached to the guide frame
442
d.
The upper frame
442
e
rotatably guides the upper shaft portion of the second counter intermediate wheel
212
. By spring force of the coupling lever spring portion
444
b,
the coupling lever
442
is urged to rotate in the counterclockwise direction. By bringing a contact portion
442
a
of the coupling lever
442
into contact with the coupling lever contact portion
440
c
of the stop lever
440
, a position of the coupling lever
442
in the rotational direction is determined. In the state shown by
FIG. 17
, the second counting transmission pinion
212
b
of the second counter intermediate wheel
212
is not in mesh with the second counting wheel
214
.
An hour coupling transmission lever
452
is rotatably provided centering on an hour coupling operation lever rotation guide pin
456
(center position is indicated by
456
in FIG.
17
). The hour coupling operation lever
452
is provided with an hour coupling operation lever operating pin
450
and an hour coupling lever operation lever operating pin
454
. The hour coupling operation lever operating pin
450
is engaged with the hour coupling lever pin operating portion
440
b
of the stop lever
440
. Therefore, a position of the hour coupling operation lever
452
in the rotational direction is determined by the stop lever
440
.
In
FIG. 17
, the rotational center of the minute counting wheel
260
is disposed substantially in “12 o'clock direction” of the movement. The rotational center of the minute counter intermediate wheel
258
is disposed between “12 o'clock direction” and “3 o'clock direction” of the movement. The rotational center of the operating cam
420
is disposed substantially in “3 o'clock direction”. The rotational center of the second counter intermediate wheel
212
is disposed substantially in “9 o'clock direction” of the movement. The contact portion
442
a
of the coupling lever
442
is disposed substantially in “6 o'clock direction” of the movement. The coupling lever
442
and the hour coupling operation lever
452
are disposed between “6 o'clock direction” and “9 o'clock direction” of the movement. The hammer
432
is disposed between “12 o'clock direction” and “3 o'clock direction” of the movement.
In reference to
FIG. 18
, the coupling lever operation lever operating pin
454
is arranged to penetrate a portion of the main plate
102
from the front side of the movement to the back side of the movement. The hour coupling lever operation lever operating pin
454
is provided with an hour coupling lever operating portion
454
a.
The hour coupling lever operating portion
454
a
is constituted to be able to engage with the hour coupling lever
254
. The hour coupling lever operation lever operating pin
454
is disposed substantially in “9 o'clock direction” of the movement.
In reference to
FIG. 19
, the hour coupling lever
254
is rotatably provided centering on an hour coupling lever rotation guide pin
280
(center position is indicated by
280
in FIG.
19
). The hour coupling lever
254
is provided with an hour coupling lever spring portion
254
a,
an hour hammer transmission lever operating portion
254
b,
an hour counting wheel contact portion
254
c,
a first pin engaging portion
254
d
and a second pin engaging portion
254
e.
The first pin engaging portion
254
d
is disposed more proximate to the inner side of the movement than the second pin engaging portion
254
e.
By spring force of the hour coupling lever spring portion
254
a,
the hour coupling lever
254
is urged to rotate in the counterclockwise direction. In the state shown by FIG.
19
, the hour counting wheel contact portion
254
c
is brought into contact with a gear portion of the hour counting wheel
250
.
An hour hammer transmission lever
510
is rotatably provided centering on an hour hammer transmission lever rotation guide pin
512
(center position is indicated by
512
in FIG.
19
). The hour hammer transmission lever
510
is provided with an hour hammer lever operating pin
514
and an hour coupling lever engaging portion
510
a.
The hour hammer
440
is provided rotatably centering on an hour hammer rotation guide pin
448
(center position is indicated by
448
in FIG.
19
).
The hour hammer
440
is provided with the hour hammer operating pin engaging portion
440
a
and the hour zeroing portion
440
b.
The hour hammer operating pin
514
of the hour hammer transmission lever
510
is engaged with the hour hammer operating pin engaging portion
440
a
and a position of the hour hammer
440
in the rotational direction is determined. It is preferable to constitute the hour hammer operating pin engaging portion
440
a
in a shape of a long hole.
By operating the reset button
840
, the hour zeroing portion
440
b
of the hour hammer
440
is brought into contact with the hour heart cam
252
of the hour counting wheel
248
to thereby zero the hour heart cam
252
. Therefore, under the state, the chronograph hour hand
128
indicates “zero position”. In the state shown by
FIG. 19
, the hour zeroing portion
440
b
of the hour hammer
440
is disposed to be remote from the heart cam
252
.
(2-2) Operation in chronograph measurement
Next, in reference to
FIG. 20
, the start/stop button
830
disposed in 2 o'clock direction of the movement is pushed in the direction of the arrow mark
410
. When the chronograph time piece is set to a chronograph measurement mode, the operating lever
414
is guided by the operating lever guide pin
416
and is slidably moved toward the inner side of the movement against spring force of the operating lever spring
418
.
By the slidable movement of the operating lever
414
, an operational end portion
414
f of the operating lever
414
rotates the ratchet teeth
424
of the operating cam
420
by one tooth in the clockwise direction. The position of the ratchet teeth
424
in the rotational direction is positioned by the setting portion
426
a
of the operating cam jumper
426
.
The number of teeth of the ratchet teeth
424
is 16, the number of teeth of the drive teeth
422
is 8 and accordingly, when the ratchet teeth
424
are rotated by one tooth, the drive teeth
422
are also rotated by a half pitch in the clockwise direction. Therefore, by rotating the drive teeth
422
, the hammer setting lever
430
is rotated in the counterclockwise direction while centering on the hammer setting lever rotation guide pin
428
and the positioning portion
430
f
of the hammer setting lever
430
is engaged with the setting portion
432
f
of the hammer
432
. As a result, the hammer setting lever
430
is mounted on the outer peripheral face of the peak portion
424
t
of the drive teeth
422
and is held in a state shown by FIG.
20
.
By such rotation of the hammer setting lever
430
, the setting portion
432
f
of the hammer
432
is pushed and the hammer
432
is rotated in the counterclockwise direction centering on the operating lever guide pin
416
. As a result, the minute zeroing portion
432
a
of the hammer
432
is separated from the minute heart cam
262
of the minute counting wheel
260
. Therefore, under the state, the chronograph minute hand
124
is rotated and “minute” of the result of measurement of the chronograph can be displayed.
Further, since the hammer
432
is rotated in the counterclockwise direction, the second zeroing portion
432
b
of the hammer
432
is separated from the second heart cam
220
of the second counting wheel
214
.
By rotating the drive teeth
422
, the stop lever
440
is rotated in the clockwise direction centering on the stop lever rotation guide pin
438
. Further, as described above in reference to
FIG. 14
, the outer peripheral portion
442
f
of the guide frame
442
d
is brought into contact with the contact portion
202
d
of the chronograph bridge
202
to thereby set the position of the coupling lever
442
in the rotational direction. Under the state, the stop lever
440
is held to be separated from the coupling lever
442
.
The stop lever
440
mounts on the outer peripheral face of the peak portion
424
t
of the drive teeth
422
and is held in the state shown by FIG.
20
. Therefore, the second counting wheel contact portion
440
a
is separated from the gear of the second counting wheel
214
. Therefore, under the state, the chronograph second hand
118
is rotated and “second” of the result of measurement of the chronograph can be displayed.
By rotating the stop lever
440
, the coupling lever
442
is rotated in the counterclockwise direction centering on the coupling lever rotation guide pin
446
. As described above, by the spring force of the coupling lever spring portion
444
b,
the coupling lever
442
is always urged to rotate in the counterclockwise direction.
Therefore, under the state, the state in which the second counting transmission pinion
212
b
and the second counting wheel
214
are in mesh with each other is maintained with certainty.
Therefore, the second counting wheel
214
can be rotated and measurement of “second” and “minute” of the chronograph is started.
Based on rotation of the barrel complete
110
, the second counting wheel
214
is rotated via rotation of the center wheel & pinion
130
, the third wheel & pinion
136
, the second wheel
154
and the second counter intermediate wheel
212
. A number of teeth of the train wheel of the second counting wheel
214
is set such that the second counting wheel
214
is rotated by one rotation per minute.
Every time of rotating the second counting wheel
214
by one rotation, the minute counter intermediate wheel
258
is rotated by one tooth by the minute driving finger
256
. The minute counting wheel
260
is rotated by rotation of the minute counter intermediate wheel
258
and after elapse of one minute, the chronograph minute hand
124
is rotated by an angle in correspondence with one minute of the minute chronograph indicator. The position of the minute chronograph wheel
260
in the rotational direction is set by the minute jumper
264
.
Further, by rotating the stop lever
440
, the hour coupling lever operation lever operating pin
450
engaged with the hour coupling lever pin operating portion
440
b
is rotated and the hour coupling operation lever
452
is rotated in the counterclockwise direction centering on the hour coupling operation lever rotation guide pin
456
. As a result, the hour coupling lever operation lever operating pin
454
is also rotated in the counterclockwise direction.
As described above in reference to
FIG. 18
, the hour coupling lever operation lever operating pin
454
penetrates a portion of the main plate
102
from the front side of the movement to the back side of the movement.
In reference to
FIG. 21
, when the hour coupling lever operation lever operating pin
454
is rotated, the first engaging portion
254
d
is pushed. Therefore, the hour coupling lever
254
is rotated centering on the hour coupling lever rotation guide pin
280
in the clockwise direction against the spring force of the hour coupling lever spring portion
254
a.
As a result, the hour counting wheel contact portion
254
c
is separated from the gear portion of the hour counting wheel
250
. Therefore, under the state, the hour counting wheel
250
can rotate, the chronograph hour hand
128
is rotated and “hour” of the result of measurement of the chronograph can be displayed.
In reference to
FIG. 22
, the hour counting transmission wheel (A)
246
is rotated based on rotation of the barrel complete
110
. The hour counting transmission wheel (C)
242
is rotated based on rotation of the hour counting transmission wheel (A)
246
. The hour counting transmission wheel (B)
244
is rotated integrally with the hour counting transmission wheel (C)
242
. By rotating the hour counting transmission wheel (B)
244
, the hour counter wheel
250
is rotated. Therefore, after elapse of one hour, the chronograph hour hand
128
is rotated by an angle in correspondence with one hour of the hour chronograph indicator.
(2-3) Operation in stopping chronograph measurement
In reference to
FIG. 23
, in the state of operating the chronograph measurement, the start/stop button disposed in 2 o'clock direction of the movement is pushed in the direction of the arrow mark
410
.
By the operation, the operating lever
414
is slidably moved toward the inner side of the movement against the spring force of the operating lever spring
418
while being guided by the operating lever guide pin
416
.
By the slidable movement of the operating lever
414
, the operational end portion
414
f of the operating lever
414
rotates the ratchet teeth
424
of the operating cam
420
in the clockwise direction by further one tooth. The position of the ratchet teeth
424
in the rotational direction is positioned by the setting portion
426
a
of the operating cam jumper
426
.
When the ratchet teeth
424
are rotated by one tooth, the drive teeth
422
are also rotated in the clockwise direction by further half pitch.
Also in this state, the positioning portion
430
f
of the hammer setting lever
430
stays to be engaged with the setting portion
432
f
of the hammer
432
. As a result, the hammer setting lever
430
is held at a position the same as that in the state shown by FIG.
20
.
Since the hammer setting lever
430
is not rotated, the minute zeroing portion
432
a
of the hammer
432
stays to be separated from the minute heart cam
262
of the minute counting wheel
260
. Further, the second zeroing portion
432
b
of the hammer
432
stays to be separated from the second heart cam
220
of the second counting wheel
214
.
Since the drive teeth
422
are rotated by a half pitch, the setting portion
440
d
of the stop lever
440
is positioned between two teeth of the drive teeth
422
. By the coupling lever spring portion
444
b,
the stop lever
440
is always urged in the counterclockwise direction and accordingly, the stop lever
440
is rotated in the counterclockwise direction centering on the stop lever rotation guide pin
438
. By rotating the stop lever
440
, the coupling lever
442
is rotated in the counterclockwise direction. Therefore, the outer peripheral portion
442
f
of the guide frame
442
d
is separated from the contact portion
202
d
of the chronograph bridge
202
. Under the state, the second counting transmission pinion
212
b
and the second counting wheel
214
are brought into out of mesh.
At the same time, the second counting wheel contact portion
440
a
of the stop lever
440
is brought into contact with a gear of the second counting wheel
214
. Therefore, under the state, the rotation of the second counting wheel
214
is set. As a result, the chronograph second hand
118
is stopped and display of “second” of a result of measurement of the chronograph at the time point is maintained. Further, at the same time, the chronograph minute hand
128
is also stopped and display of “minute” of the result of measurement of the chronograph at the time point is maintained.
As described above, on the front side of the movement, by rotating the stop lever
440
, the coupling lever
442
is rotated in the counterclockwise direction centering on the coupling lever rotation guide pin
446
. As a result, on the back side of the movement, the hour coupling lever operation lever operating pin
454
is rotated in the counterclockwise direction toward the outer side of the movement.
In reference to
FIG. 24
, by the rotational movement of the hour coupling lever operation lever operating pin
454
, the hour coupling lever
254
is rotated in the counterclockwise direction while centering on the hour coupling lever rotation guide pin
280
. Therefore, the hour counting wheel contact portion
254
c
is brought into contact with the gear portion of the hour counting wheel
250
.
When rotation of the hour counting wheel
250
is set, also the hour counting transmission wheel (B)
244
cannot be rotated. Meanwhile, by rotation of the barrel complete
110
, the hour counting transmission wheel (A)
246
is rotated and by rotating the hour counting transmission wheel (A)
246
, the hour counting transmission wheel (C)
242
is rotated.
Therefore, the fitting portion
244
c
of the hour counting transmission wheel (C)
242
is slipped relative to the fitting portion
244
c
of the hour counting transmission wheel (B)
244
. By the constitution, while maintaining rotation of the barrel complete
110
, rotation of the hour counting wheel
250
can be stopped.
Therefore, under the state, the chronograph second hand
118
, the chronograph minute hand
124
and the chronograph hour hand
128
are stopped in the state respectively displaying “second”, “minute” and “hour” of an elapse time period from the start time point.
Further, by rotation of the barrel complete
110
, the front train wheel continues operating and accordingly, by the hour hand
150
, the minute hand
134
and the second hand
156
, “hour”, “minute” and “second” of current time can be displayed.
(2-4) Case of restarting measurement of chronograph
In the state of stopping the chronograph measurement shown by FIG.
23
and
FIG. 24
, by pushing again the start/stop button
830
in the direction of the arrow mark
410
, the chronograph time piece can be set again to the chronograph measurement mode.
By the slidable movement of the operating lever
414
, the operational end portion
414
f of the operating lever
414
rotates the ratchet teeth
424
of the operating cam
420
by one tooth in the clockwise direction. By rotating the drive teeth
422
, the hammer setting lever
430
is rotated in the counterclockwise direction centering on the hammer setting lever rotation guide pin
428
and the hammer setting lever
430
mounts on the outer peripheral face of the peak portion
224
t
of the drive teeth
422
and is held in the state shown by FIG.
20
.
By such rotation of the hammer setting lever
430
, the minute zeroing portion
432
a
of the hammer
432
is separated from the minute heart cam
262
of the minute counting wheel
260
. Therefore, under the state, the chronograph minute hand
124
can be rotated again.
Further, since the hammer
432
is rotated in the counterclockwise direction, the second zeroing portion
432
b
of the hammer
432
is separated from the second heart cam
220
of the second counting wheel
214
.
By rotating the drive teeth
422
, the stop lever
440
is rotated in the clockwise direction centering on the stop lever rotation guide pin
438
and the stop lever
440
mounts on the outer peripheral face of the peak portion
424
t
of the drive teeth
422
and is held in the state shown by FIG.
20
. Therefore, the second counting wheel contact portion
440
a
is separated from the gear of the second counting wheel
214
. Therefore, under the state, the chronograph second hand
118
can be rotated again.
Further, by rotating the stop lever
440
, the hour coupling lever operation lever operating pin
454
is rotated and the hour counting wheel contact portion
254
c
is separated from the gear portion of the hour counting wheel
250
. Therefore, the hour counting wheel
250
can be rotated again.
(2-5) Reset operation
In reference to FIG.
25
through
FIG. 27
, in the state in which measurement of the chronograph is stopped, reset operation can be carried out by pushing the reset button
840
disposed in 4 o'clock direction of the movement in the direction designated by the arrow mark
412
.
In reference to FIG.
25
and
FIG. 27
, when the reset button
840
is pushed, on the back side of the movement, the hour hammer transmission lever
510
is rotated in the counterclockwise direction and by the hour hammer operating pin
514
, the hour hammer
440
is rotated in the clockwise direction. Then, the time zeroing portion
440
b
of the hammer
440
is brought into contact with the hour heart cam
252
of the hour counting wheel
248
to thereby zero the hour counting wheel
248
.
At the same time, by rotating the hour hammer transmission lever
510
, the hour coupling lever engaging portion
510
a
of the hour hammer transmission lever
510
is engaged with the hour hammer transmission lever operating portion
254
b
of the hour coupling lever
254
to thereby rotate the hour coupling lever
254
in the clockwise direction. Then, the hour counting wheel contact portion
254
c
is separated from the gear portion of the hour counting wheel
250
.
Therefore, as a result of such reset operation, the chronograph hour hand
128
returns to and stops at “zero position” before starting to operate the chronograph mechanism.
In reference to
FIG. 28
, when rotation of the hour counting wheel
250
is set, also the hour counting transmission wheel (B)
244
cannot be rotated. Meanwhile, by rotation of the barrel complete
110
, the hour counting transmission wheel (A)
246
is rotated and by rotating the hour counting transmission wheel (A)
246
, the hour counting transmission wheel (C)
242
is rotated.
Therefore, the fitting portion
244
c
of the hour counting transmission wheel (C)
242
is slipped relative to the fitting portion
244
c
of the hour counting transmission wheel (B)
244
.
Further, in reference to
FIG. 27
, when the hour coupling lever
254
is rotated in the clockwise direction, the second contact portion
254
e
of the hour coupling lever
254
is rotated in the clockwise direction and the hour coupling lever operation lever operating pin is moved toward the inner side of the movement. Then, in reference to
FIG. 26
, the hour coupling operation lever
452
is rotated in the counterclockwise direction. Then, the hour coupling operation lever transmitting pin
450
provided to the hour coupling operation lever
452
is also rotated in the counterclockwise direction and the hour coupling operation lever transmitting pin
450
rotates the stop lever
440
in the clockwise direction. As a result, the second counting wheel contact portion
440
a
is separated from the gear of the second counting wheel
214
. Under the state, the second counting transmission pinion
212
b
is not in mesh with the second counting wheel
214
and accordingly, the second counting wheel
214
is not rotated.
In reference to FIG.
25
and
FIG. 26
, on the front side of the movement, the hammer transmission lever
520
is rotatably provided centering on the hammer transmission lever rotation guide pin
508
. The hammer transmission lever
520
is provided with the hammer setting lever engaging portion
520
a.
The hammer transmission lever spring
522
urges the hammer transmission lever
520
to rotate in the counterclockwise direction.
When the reset button
840
is pushed, the hammer transmission lever
520
is rotated in the clockwise direction via operation of the hour hammer transmission lever
510
and the hammer setting lever engaging portion
520
a
pushes the hammer setting lever
430
. Then, the hammer setting lever
430
is rotated in the clockwise direction and the positioning portion
432
f
of the hammer setting lever
430
is separated from the hammer setting portion
432
f
of the hammer
432
. Then, by the spring force of the hammer spring
434
, the hammer setting lever
430
is rotated in the clockwise direction. Then, the minute zeroing portion
432
a
of the hammer
432
is brought into contact with the minute heart cam
262
of the minute counting wheel
260
, the minute counting wheel
260
is zeroed, at the same time, the second zeroing portion
432
b
of the hammer
432
is brought into contact with the second heart cam
220
of the second counting wheel
214
to thereby zero the second counting wheel
214
.
According to the above-described reset operation, dimensions and shapes of related parts are determined such that operation of “separating the second counting wheel contact portion
440
a
of the stop lever
440
from the gear of the second counting wheel
214
” is completed prior to operation of “zeroing the second counting wheel
214
”.
That is, in correspondence with the stroke of pushing the reset button
840
, the hour hammer transmission lever
510
, the hour coupling lever
254
and the hour coupling operation lever
452
are operated, the stop lever
440
is rotated and the second counting wheel contact portion
440
a
is separated from the gear of the second counting wheel
214
. Thereafter, by operating the hammer transmission lever
520
, the hammer setting lever
430
and the hammer setting lever
430
, the minute zeroing portion
432
a
of the hammer
432
returns the minute counting wheel
260
to zero and the second zeroing portion
432
b
of the hammer
432
is constituted to return the second counting wheel
214
to zero.
Therefore, the operation of returning the second counting wheel
214
and the minute counting wheel
260
is achieved with certainty without interfering with stopping force of the stop lever
440
.
The above-described operation relates to the state in which measurement of the chronograph is stopped. In measurement of the chronograph, the hammer setting lever
430
mounts on the outer peripheral face of the drive teeth
422
and therefore, the chronograph time piece is not reset.
(3) Explanation of operation of chronograph time piece
(3-1) State in which the chronograph mechanism is not operated
In reference to
FIG. 29
, in a state in which the chronograph mechanism is not operated, the hour hand
150
indicates “hour” in current time, the minute hand
134
indicates “minute” in current time and the second hand
156
(so-to-speak small second hand) indicates “second” in current time. The chronograph time piece shown by
FIG. 29
displays intermediary time between “10 o'clock 8 minute 12 second” and “10 o'clock 8 minutes 13 seconds”.
In this state, the chronograph hour hand
128
is stopped at a position indicating “12”, the chronograph minute hand
124
is stopped at a position indicating “30” and the chronograph second hand
118
is stopped in 12 o'clock direction of the time piece, that is, at a position indicating “60”.
The chronograph second hand
118
is constituted to rotate by one rotation per minute and chronograph second indicators
810
in correspondence with the chronograph second hand
118
are provided with “5”, “10”, “15” . . . “50”, “55” and “60” along the outer periphery of the time piece, that is, along a rotational locus of a front end of the chronograph second hand
118
.
As an example, the embodiment of the chronograph time piece according to the invention is constituted by so-to-speak “8 oscillation”. “8 oscillation” is referred to as a constitution in which the balance with hairspring makes 28800 sway per hour.
Here, “sway” indicates a state in which the balance with hairspring is rotated in one direction and the balance with hairspring returns to the original position by “2 sway”. That is, in the case of the time piece of “8 oscillation”, the balance with hairspring makes 1 sway per second and is oscillated to reciprocate by 4 times per second.
The chronograph time piece may be constituted to be a time piece of so-to-speak “10 oscillation”. “10 oscillation” is referred to as a constitution in which the balance with hairspring makes 36000 sway per hour. In the case of the time piece of “10 oscillation”, the balance with hairspring makes 10 sway per second and is oscillated to reciprocate 5 times per second.
By constituting in this way, there can be realized a chronograph time piece capable of carrying out chronograph measurement by a unit of “{fraction (1/10)} second”. In this constitution, the chronograph second indicators
810
may be provided at every “{fraction (1/10)} second” or the chronograph second indicators
810
may be provided at every “⅕ second”.
By constituting in this way, there can be realized a chronograph time piece having high accuracy.
A chronograph time piece may be constituted to be a time piece of so-to-speak “5.5 oscillation” or “6 oscillation”. According to the constitution, the chronograph second indicators
810
are set in conformity with a number of oscillation and a number of teeth of a train wheel is set in conformity with the number of oscillation.
The chronograph minute hand
124
is constituted to rotate by one rotation per 30 minutes and chronograph minute indicators
812
in correspondence with the chronograph minute hand
124
are provided with “5”, “10”, “15”, “20”, “25” and “30” along a rotational locus of a front end of the chronograph minute hand
124
. The chronograph minute hand
124
may be constituted to rotate by one rotation per 60 minutes.
The chronograph hour hand
128
is constituted to rotate by one rotation per 12 hours and chronograph hour indicators
814
in correspondence with the chronograph hour hand
128
are provided with “1”, “2”, “3” . . . “11” and “12” along a rotational locus of a front end of the chronograph hour hand
128
. The chronograph hour hand
128
may be constituted to rotate by one rotation per 24 hours.
A date character
820
of a date indicator
270
displays current date. According to the chronograph time piece shown by
FIG. 29
, “date of 5” is displayed.
According to the chronograph time piece of the invention, the rotational center of the hour hand
150
, the rotational center of the minute hand
134
and the rotational center of the chronograph second hand
118
are arranged substantially at center of the time piece, the rotational center of the second hand
156
(so-to-speak small second hand) is arranged on 9 o'clock side of the time piece, the rotational center of the chronograph minute hand
124
is arranged on 12 o'clock side of the time piece and the rotational center of the chronograph hour hand
128
is arranged on 6 o'clock side of the time piece. Therefore, according to the chronograph time piece of the invention, display of the respective indicator hands is very easy to understand.
(3-2) State in which the chronograph mechanism is operated
In reference to
FIG. 30
, the start/stop button
830
disposed in 2 o'clock direction of the chronograph time piece is pushed and measurement of chronograph is started.
According to the state shown by
FIG. 30
, the chronograph hour hand
128
continues rotating while indicating between “1” and “2” of the chronograph time indicators
814
, the chronograph minute hand
124
continues rotating while indicating “22” of the chronograph minute indicators
812
and the chronograph second hand
118
continues to rotating while indicating between “16” and “17” of the chronograph second indicators
810
.
That is, measurement of the chronograph time piece is brought into a state at which “1 hour 22 minutes 16 seconds 7” has elapsed.
Further, also in such a state, the hour hand
150
indicates “hour” in current time, the minute hand
134
indicates “minute” in current time and the second hand
156
indicates “second” in current time.
(3-3) State in which the chronograph mechanism is stopped
In the state shown by
FIG. 30
, when the start/stop button
830
disposed in 2 o'clock direction of the chronograph time piece is pushed by one more time, measurement of the chronograph time piece can be stopped. Therefore, the chronograph time piece is brought into a state in which the chronograph is stopped while displaying “1 hour 22 minutes 16 seconds 7”.
Further, even in the state, the hour hand
150
indicates “hour” in current time, the minute hand
134
indicates “minute” in current time and the second hand
156
indicates “second” in current time.
(3-4) Operation of reset
In reference to
FIG. 31
, when the reset button
840
is pushed, the chronograph second hand
118
, the chronograph minute hand
124
and the chronograph hour hand
128
return to “zero positions” before starting to operate the chronograph mechanism and are stopped.
Further, even in the state, the hour hand
150
indicates “hour” in current time, the minute hand
134
indicates “minute” in current time and the second hand
156
indicates “second” in current time.
Industrial Applicability
As explained above, the invention achieves effects described below since there is constructed the constitution described above in the chronograph time piece.
(1) According to the chronograph time piece of the invention, a number of parts is small and the structure is simple.
(2) According to the chronograph time piece of the invention, operation of counting mechanisms is extremely stabilized.
(3) According to the chronograph time piece of the invention, the hour counting train wheel and the minute counting train wheel are small-sized and thin.
Claims
- 1. A chronograph timepiece comprising:a barrel mounted for undergoing rotation; a front train wheel for undergoing rotation in accordance with rotation of the barrel; a second counter intermediate wheel for undergoing rotation in accordance with rotation of the front train wheel; a second counting wheel for undergoing rotation in accordance with rotation of the second counter intermediate wheel in a chronograph measurement mode; a chronograph second display member for displaying a measurement result corresponding to an elapsed period of time in accordance with rotation of the second counting wheel; a minute counting train wheel for undergoing rotation in accordance with rotation of the second counting wheel; a chronograph minute display member for displaying a measurement result corresponding to an elapsed period of time in accordance with rotation of the minute counting train wheel; at least one hour counting train wheel for undergoing rotation in accordance with rotation of the barrel in the chronograph measurement mode; and a chronograph hour display member for displaying a measurement result corresponding to an elapsed period of time in accordance with rotation of the hour counting train wheel.
- 2. A chronograph timepiece according to claim 1; wherein the at least one hour counting train wheel comprises a pair of hour counting train wheels; and further comprising an hour counting slip mechanism disposed between the pair of hour counting train wheels so that one of the hour counting train wheel slips relative to the other of the hour counting train wheel.
- 3. A chronograph timepiece according to claim 1; wherein the at least one hour counting train wheel comprises a first hour counting train wheel for undergoing rotation in accordance with rotation of the barrel, a second hour counting train wheel for undergoing rotation in accordance with rotation of the first hour counting train wheel in the chronograph measurement mode; and further comprising an hour counting slip mechanism disposed between the first and second hour counting train wheels so that when a chronograph measurement is not executed, rotation of the first hour counting train wheel is not transmitted to the second hour counting train wheel and so that in the chronograph measurement mode, rotation of the first hour counting train wheel is transmitted to the second hour counting train wheel.
- 4. A chronograph timepiece according to claim 3; wherein the front train wheel has a center wheel & pinion for undergoing rotation in accordance with rotation of the barrel, a third wheel & pinion for undergoing rotation in accordance with rotation of the center wheel & pinion, a second wheel for undergoing rotation in accordance with rotation of the third wheel & pinion, a minute transmission pinion for undergoing rotation in accordance with rotation of the center wheel & pinion, and a minute drive wheel for undergoing rotation in accordance with rotation of the minute transmission pinion; and further comprising a second display member for undergoing rotation in accordance with rotation of the second wheel for displaying second time, a minute display member for undergoing rotation in accordance with rotation of the minute drive wheel for displaying minute time, an hour wheel for undergoing rotation in accordance with rotation of the minute transmission pinion, and an hour display member for undergoing rotation in accordance with rotation of the hour wheel for displaying hour time.
- 5. A chronograph timepiece according to claim 1; wherein the front train wheel has a center wheel & pinion for undergoing rotation in accordance with rotation of the barrel, a third wheel & pinion for undergoing rotation in accordance with rotation of the center wheel & pinion, a second wheel for undergoing rotation in accordance with rotation of the third wheel & pinion, a minute transmission pinion for undergoing rotation in accordance with rotation of the center wheel & pinion, and a minute drive wheel for undergoing rotation in accordance with rotation of the minute transmission pinion; and further comprising a second display member for undergoing rotation in accordance with rotation of the second wheel for displaying second time, a minute display member for undergoing rotation in accordance with rotation of the minute drive wheel for displaying minute time, an hour wheel for undergoing rotation in accordance with rotation of the minute transmission pinion, and an hour display member for undergoing rotation in accordance with rotation of the hour wheel for displaying hour time.
- 6. A chronograph timepiece according to claim 1; wherein the second counting wheel has a minute driving finger for intermittently rotating the minute counting train wheel; and wherein the minute counting train wheel has a minute counter intermediate wheel rotated by the minute driving finger, and a minute counting wheel for undergoing rotation in accordance with rotation of the minute counter intermediate wheel.
- 7. A chronograph timepiece according to claim 2; wherein the front train wheel has a center wheel & pinion for undergoing rotation in accordance with rotation of the barrel, a third wheel & pinion for undergoing rotation in accordance with rotation of the center wheel & pinion, a second wheel for undergoing rotation in accordance with rotation of the third wheel & pinion, a minute transmission pinion for undergoing rotation in accordance with rotation of the center wheel & pinion, and a minute drive wheel for undergoing rotation in accordance with rotation of the minute transmission pinion; and further comprising a second display member for undergoing rotation in accordance with rotation of the second wheel for displaying second time, a minute display member for undergoing rotation in accordance with rotation of the minute drive wheel for displaying minute time, an hour wheel for undergoing rotation in accordance with rotation of the minute transmission pinion, and an hour display member for undergoing rotation in accordance with rotation of the hour wheel for displaying hour time.
- 8. A chronograph timepiece comprising:a base plate; a barrel mounted on the base plate for undergoing rotation; a second counting wheel for measuring an elapsed period of time in seconds in accordance with rotation of the barrel in a chronograph measurement mode; a minute counting train wheel for measuring an elapsed period of time in minutes in accordance with rotation of the barrel in the chronograph measurement mode; a plurality of hour counting train wheels for measuring an elapsed period of time in hours in accordance with rotation of the barrel in the chronograph measurement mode; a chronograph second display member for displaying an elapsed period measured by the second counting wheel; a chronograph minute display member for displaying an elapsed period measured by the minute counting train wheel; a chronograph hour display member for displaying an elapsed period measured by one of the hour counting train wheels; second and minute counting coupling means for starting and stopping operation of the chronograph second display member and the chronograph minute display member; and hour counting coupling means for starting and stopping operation of the chronograph hour display member.
- 9. A chronograph timepiece according to claim 8; further comprising chronograph second and minute zeroing means disposed on a front side of the base plate for simultaneously resetting the chronograph second display member and the chronograph minute display member to zero; and chronograph hour zeroing means disposed on a rear side of the base plate for resetting the chronograph hour display member to zero.
- 10. A chronograph timepiece according to claim 9; further comprising a dial disposed at the rear side of the base plate; wherein a rotational center of the chronograph second display member is disposed substantially at a center of the chronograph timepiece; wherein a rotational center of the chronograph hour display member is disposed on a straight line connecting the center of the chronograph timepiece and a 6 o'clock indicator of the dial or a vicinity thereof; and wherein a rotational center of the chronograph minute display member is disposed on a straight line connecting the center of the chronograph timepiece and a 12 o'clock indicator of the dial or a vicinity thereof.
- 11. A chronograph timepiece according to claim 10; further comprising a second display member for displaying second time; wherein a rotational center of the second display member is disposed on a straight line connecting the center of the chronograph timepiece.
- 12. A chronograph timepiece according to claim 11; further comprising a button disposed generally in a 2 o'clock position of the chronograph timepiece for operating the second and minute counting coupling means and the hour counting coupling means.
- 13. A chronograph timepiece according to claim 12; further comprising a button disposed generally in a 4 o'clock position of the chronograph timepiece for operating the chronograph second and minute zeroing means and the chronograph hour zeroing means.
- 14. A chronograph timepiece according to claim 13; wherein the hour counting train wheels comprise a first hour counting transmission wheel for undergoing rotation in accordance with rotation of the barrel, a second hour counting transmission wheel for undergoing rotation in accordance with rotation of the first hour counting transmission wheel, a third hour counting transmission wheel cooperating with the second hour counting transmission wheel via a slip mechanism, and an hour counting wheel for undergoing rotation in accordance with rotation of the third hour counting transmission wheel in the chronograph measurement mode; and wherein the chronograph hour display member rotates in accordance with rotation of the hour counting wheel for displaying the elapsed period in the chronograph measurement mode.
- 15. A chronograph timepiece according to claim 14; wherein the second counting wheel has a minute driving finger for intermittently rotating the minute counting train wheel; and wherein the minute counting train wheel has a minute counter intermediate wheel rotated by the minute driving finger and a minute counting wheel for undergoing rotation in accordance with rotation of the minute counter intermediate wheel.
- 16. A chronograph timepiece according to claim 8; further comprising a button disposed generally in a 2 o'clock position of the chronograph timepiece for operating the second and minute counting coupling means and the hour counting coupling means.
- 17. A chronograph timepiece according to claim 8; wherein the hour counting train wheels comprise a first hour counting transmission wheel for undergoing rotation in accordance with rotation of the barrel, a second hour counting transmission wheel for undergoing rotation in accordance with rotation of the first hour counting transmission wheel, a third hour counting transmission wheel cooperating with the second hour counting transmission wheel via a slip mechanism, and an hour counting wheel for undergoing rotation in accordance with rotation of the third hour counting transmission wheel in the chronograph measurement mode; and wherein the chronograph hour display member rotates in accordance with rotation of the hour counting wheel for displaying the elapsed period in the chronograph measurement mode.
- 18. A chronograph timepiece according to claim 8; wherein the second counting wheel has a minute driving finger for intermittently rotating the minute counting train wheel; and wherein the minute counting train wheel has a minute counter intermediate wheel rotated by the minute driving finger, and a minute counting wheel for undergoing rotation in accordance with rotation of the minute counter intermediate wheel.
- 19. A chronograph timepiece according to claim 9; further comprising a button disposed generally in a 2 o'clock position of the chronograph timepiece for operating the second and minute counting coupling means and the hour counting coupling means.
- 20. A chronograph timepiece according to claim 9; further comprising a button disposed generally in a 4 o'clock position of the chronograph timepiece for operating the chronograph second and minute zeroing means and the chronograph hour zeroing means.
- 21. A chronograph timepiece according to claim 9, wherein the hour counting train wheels comprise a first hour counting transmission wheel for undergoing rotation in accordance with rotation of the barrel, a second hour counting transmission wheel for undergoing rotation in accordance with rotation of the first hour counting transmission wheel, a third hour counting transmission wheel cooperating with the second hour counting transmission wheel via a slip mechanism, and an hour counting wheel for undergoing rotation in accordance with rotation of the third hour counting transmission wheel in the chronograph measurement mode; and wherein the chronograph hour display member rotates in accordance with rotation of the hour counting wheel for displaying the elapsed period in the chronograph measurement mode.
- 22. A chronograph timepiece according to claim 10; further comprising a button disposed generally in a 2 o'clock position of the chronograph timepiece for operating the second and minute counting coupling means and the hour counting coupling means.
- 23. A chronograph timepiece according to claim 10; further comprising a button disposed generally in a 4 o'clock position of the chronograph timepiece for operating the chronograph second and minute zeroing means and the chronograph hour zeroing means.
- 24. A chronograph timepiece according to claim 10; wherein the hour counting train wheels comprise a first hour counting transmission wheel for undergoing rotation in accordance with rotation of the barrel, a second hour counting transmission wheel for undergoing rotation in accordance with rotation of the first hour counting transmission wheel, a third hour counting transmission wheel cooperating with the second hour counting transmission wheel via a slip mechanism, and an hour counting wheel for undergoing rotation in accordance with rotation of the third hour counting transmission wheel in the chronograph measurement mode; and wherein the chronograph hour display member rotates in accordance with rotation of the hour counting wheel for displaying the elapsed period in the chronograph measurement mode.
- 25. A chronograph timepiece according to claim 11; further comprising a button disposed generally in a 4 o'clock position of the chronograph timepiece for operating the chronograph second and minute zeroing means and the chronograph hour zeroing means.
- 26. A chronograph timepiece according to claim 11; wherein the hour counting train wheels comprise a first hour counting transmission wheel for undergoing rotation in accordance with rotation of the barrel, a second hour counting transmission wheel for undergoing rotation in accordance with rotation of the first hour counting transmission wheel, a third hour counting transmission wheel cooperating with the second hour counting transmission wheel via a slip mechanism, and an hour counting wheel for undergoing rotation in accordance with rotation of the third hour counting transmission wheel in the chronograph measurement mode; and wherein the chronograph hour display member rotates in accordance with rotation of the hour counting wheel for displaying the elapsed period in the chronograph measurement mode.
- 27. A chronograph timepiece according to claim 12; wherein the hour counting train wheels comprise a first hour counting transmission wheel for undergoing rotation in accordance with rotation of the barrel, a second hour counting transmission wheel for undergoing rotation in accordance with rotation of the first hour counting transmission wheel, a third hour counting transmission wheel cooperating with the second hour counting transmission wheel via a slip mechanism, and an hour counting wheel for undergoing rotation in accordance with rotation of the third hour counting transmission wheel in the chronograph measurement mode; and wherein the chronograph hour display member rotates in accordance with rotation of the hour counting wheel for displaying the elapsed period in the chronograph measurement mode.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9-353620 |
Dec 1997 |
JP |
|
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/JP98/05789 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO99/32944 |
7/1/1999 |
WO |
A |
US Referenced Citations (3)
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JP |
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JP |
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Aug 1977 |
JP |
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Apr 1986 |
JP |
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Nov 1989 |
JP |
04212090 |
Aug 1992 |
JP |
9178868 |
Jul 1997 |
JP |