Patent Grant
7738324
The present invention relates to a display device and a timepiece calendar device, and in particular to a display device and a timepiece calendar device capable of display in larger letters and/or numbers.
In the following, a case in which date calendar information is displayed in a timepiece in larger numbers, using a timepiece calendar device as an example of a display device, is described.
Conventionally, for large display of a calendar in a calendar window, two date dials are used to display the calendar such that the calendar letters on the respective date dials are shown in the calendar window defined on the dial. Specifically, an arrangement in which one of the two date dials is advanced while the other is kept still and, thereafter, the other is advanced while the one is kept still makes it possible to display the letters on the two date dials. This is disclosed in Swiss Patent No. CH 660941 B5 (see FIGS. 1 and 3).
This concept is disclosed also in Japanese Patent Laid-Open Publications Nos. 2005-156562 (FIGS. 4, 5, and 6) and 2005-156563 (FIGS. 2, 3, and 4), both disclosed later than the priority date of this application.
The above-described three patent documents are common in that the upper date dial of the two date dials has sixteen sectors, while the lower date dial has seventeen sectors. Accordingly, the upper and lower date dials have different numbers of teeth in the toothed portion, with the upper date dial having sixteen teeth and the lower date dial having seventeen teeth. The difference of one tooth results in a difference (displacement) in positional relationship in a plan view between the teeth of the upper and lower date dials.
Thus, as disclosed in Swiss Patent No. CH 660941 B5 (FIG. 1), Japanese Patent Laid-Open Publication Nos. 2005-156562 (FIG. 7) and 2005-156563 (FIG. 5), both disclosed later than the priority date of this application, two date jumpers in two shapes mounted in different positions in a plan view are necessary, one shape for the upper date dial and the other shape for the lower date dial. This results in the need for a wider space and a complicated structure.
When a position where one tooth of the upper date dial overlaps in a plan view one tooth of the lower date dial is reserved for a drive wheel, a space for mounting a date corrector setting wheel cannot be ensured as no other such space where the tooth of the upper date dial overlaps the tooth of the lower date dial is available. Thus, initial CH 660941 B5 (FIG. 1) and Japanese Patent Laid-Open Publication No. 2005-156563 (FIG. 6), disclosed later than the priority date of the present application, make a proposal without a date correction mechanism. However, as a date correction mechanism is necessary to advance the date dial for date matching when the timepiece date becomes different from the current date at the end of a short month, at activation of the timepiece, or due to battery exchange, a proposal including no date correction mechanism is inconvenient as it makes a correction operation troublesome. Therefore, Japanese Patent Laid-Open Publication No. 2005-156562 (FIG. 8) discloses a two-toothed portion structure in which a toothed portion having different positions (pitches) is placed on the toothed portion of the lower date dial, the toothed portion to place. This results in the lower date dial having a complicated structure.
An object of the present invention is to propose a display device and a timepiece calendar display capable of large display of information and solving a conventional technical problem.
In order to address the above-described problem, according to one aspect of the present invention, there is provided a display device, comprising a first display wheel having a denotation portion for showing information about a part of a period and a toothed portion including a plurality of teeth to be driven; a second display wheel having a denotation portion for showing a part of the period other than the part of the period shown by the first display wheel, an opening via which the first display wheel is exposed, and a toothed portion including a plurality of teeth to be driven, and placed overlapping the first display wheel; and a driving finger for driving the first display wheel and the second display wheel to rotate, and further comprising a display wheel drive control portion for driving the first display wheel and the second display wheel, using the driving finger, every predetermined period of time, to thereby expose the denotation portion on one of the display wheels in a window to thereby display the information, wherein numbers of the teeth in the toothed portions of the first display wheel and of the second display wheel are the same. With the above, display which is easy to see, with information displayed in large characters, and size reduction and simplification of the structure, can be achieved.
Also, the display wheel drive control portion may comprises engagement state generation means for generating a first engagement state in which the driving finger is engaged with the toothed portion of the first display wheel but not with the toothed portion of the second display wheel when the denotation portion on the first display wheel displays the information about the part of the period in the window through the opening on the second display wheel, and for generating a second engagement state in which the driving finger is engaged with the toothed portion of the second display wheel but not with the toothed portion of the first display wheel when the denotation portion on the second display wheel displays the information about the other period in the window, and engagement state switching means for switching engagement states of the driving finger relative to the toothed portion of the first display wheel and the toothed portion of the second display wheel to thereby mutually switch the first engagement state and the second engagement state. With the display wheel drive control portion including the engagement state generation means for generating the first and second engagement states and the engagement state switching means, display which is easy to see with information displayed in large characters can be achieved, while reducing the size of and simplifying the structure.
Also, the engagement state generation means may be formed by an air swing generation portion for enabling the driving finger to air-swing with respect to one of the display wheels depending on whether or not a toothless portion formed on the toothed portion of at least one of the first display wheel and the second display wheel is located within a drive track of the driving finger, to thereby stop one of the first display wheel and the second display wheel, and drives only other display wheel. With the above, display which is easy to see with information displayed in large characters can be achieved, while reducing the size of and simplifying the structure.
Also, the engagement state generation means may be formed by an air swing generation portion for enabling the driving finger to air-swing with respect to one of the display wheels depending on whether or not a toothless portion formed on the toothed portion of at least one of the first display wheel and the second display wheel is located within a drive track of the driving finger, to thereby stop one of the first display wheel and the second display wheel, and drives only other display wheel, and the engagement state switching means may have concurrent drive means for concurrently driving the first display wheel and the second display wheel to thereby move the toothless portion located within the drive track of the driving finger. With the above, display which is easy to see with information displayed in large characters can be achieved, while reducing the size of and simplifying the structure.
Also, the toothed portion of the first display wheel may include seventeen teeth, the denotation portion on the first display wheel may have denotations of dates 17th to 31st and two information-free portions successively formed between the dates 17th and 31st, and the toothed portion of the second display wheel may include seventeen teeth. The denotation portion of the second display wheel may have denotations of dates 1st to 16th and an opening formed between the dates 1st and 16th, with the second display wheel alone being driven by the driving finger in feeding from the date 1st to the date 15th. The first display wheel and the second display wheel may be concurrently driven in feeding from the date 15th to the date 16th and the date 16th to 17th, and the first display wheel alone is driven by the driving finger in feeding from the date 17th to the date 31st, and the first display wheel and the second display wheel may be concurrently driven in feeding from the date 31st to the date 1st. With the above, display which is easy to see with information displayed in large characters and date denotations shown in succession, and size reduction and simplification of the structure, can be achieved.
In this case, the number of application of concurrent driving by the concurrent drive means may be a number obtained by adding one to a number of the information-free portion. With the above, display which is easy to see with information displayed in large characters and date denotations shown in succession, and size reduction and simplification of the structure, can be achieved.
Also, the toothless portion may be either a thin toothed portion with the tooth partially removed in a thickness direction of the toothed portion or a toothless portion with the tooth removed throughout an entire thickness of the toothed portion. With the above, display which is easy to see with information displayed in large characters can be achieved, while reducing the size of and simplifying the structure.
Also, the concurrent drive means may include a projection and a groove to be engaged with the projection, the projection and the groove being formed on the respective display wheels. With the above, display which is easy to see with information displayed in large characters can be achieved while reducing the size of and simplifying the structure.
Also, the driving finger may have a first driving finger for driving the toothed portion of the first display wheel and a second driving finger for driving the toothed portion of the second display wheel, and the engagement state generation means may be path switching means for causing the second driving finger to be displaced from a drive path to avoid engagement between the toothed portion of the second display wheel and the second driving finger, when the first driving finger drives the toothed portion of the first display wheel. With the above, display which is easy to see with information displayed in large characters, and size reduction and simplification of the structure, can be achieved.
Also, the first driving finger and the second driving finger may be driving fingers at least one of which has an abutment portion to abut on the toothed portion, and the path switching means may be a timepiece component which appears within a driving area of the driving finger during a predetermined period of time in which the toothed portion of the first display wheel is driven and contacts the abutment portion of the driving finger to thereby switch the drive path of the second driving finger to an avoidance path. With the above, size reduction and simplification of the structure is attained.
Also, the first driving finger and the second driving finger may be integrally formed. With the above, size reduction and simplification of the structure is attained.
Also, the timepiece component may be the toothed portion of the first display wheel. With the above, size reduction and simplification of the structure is attained.
Also, the toothed portion of the first display wheel and the toothed portion of the second display wheel may be formed so as to rotate along substantially identical paths, the first driving finger and the second driving finger may be formed so as to integrally drive for rotation around a predetermined rotational center as a reference, and an engagement portion of the first driving finger may be positioned closer to the toothed portion of the display wheel than an engagement portion of the second driving finger. With the above, the structure can be further simplified.
Also, the toothed portion of the first display wheel and the toothed portion of the second display wheel may be formed so as to rotate along substantially identical paths, the first driving finger and the second driving finger may be formed so as to integrally drive for rotation around a predetermined rotational center as a reference, and a length from the predetermined rotational center to an engagement portion of the first driving finger may be defined longer than a length from the predetermined rotational center to an engagement portion of the second driving finger. With the above, similarly, the structure can be further simplified.
Also, the toothed portion of the first display wheel, which is located in the drive path of the first driving finger corresponding to a predetermined period of time in which the second driving finger drives the toothed portion of the second display wheel, may be provided with a toothless portion for enabling air-swing with respect to the toothed portion to avoid engagement with the first driving finger. With the above, the structure can be simplified.
Also, the abutment portion of the first driving finger may be inserted into the toothless portion, whereby the second driving finger is located in the drive path for engagement with the toothed portion of the second display wheel. With the above, a simplified structure can be achieved.
Also, the driving finger may have a long hole for enabling a predetermined shaft to change a rotational center position thereof, and may be urged by a spring member toward the toothed portions of the first display wheel and the second display wheel. With the above, an ensured operation can be attained with a simpler structure.
Also, there can be provided a display device having a corrector setting wheel having a driving finger for toothed portion of the display wheel. With the above, a correction mechanism can be realized.
Also, the driving finger of the corrector setting wheel may include a third driving finger for correctively driving the toothed portion of the first display wheel and a fourth driving finger for correctively driving the toothed portion of the second display wheel, and may be formed integrally driving for rotation around a predetermined rotational center as a reference, in which an engagement portion of the third driving finger is positioned closer to the toothed portion of the display wheel than an engagement portion of the fourth driving finger. With the above, correctively drive can be realized using a simple structure.
Also, the driving finger of the corrector setting wheel may include a third driving finger for correctively driving the toothed portion of the first display wheel and a fourth driving finger for correctively driving the toothed portion of the second display wheel, and may be integrally formed and rotatably driving around a predetermined rotational center as a reference, in which a length from the predetermined rotational center to an engagement portion of the third driving finger is defined longer than a length from the predetermined rotational center to an engagement portion of the fourth driving finger. With the above, similarly, corrective driving can be realized using a simple structure.
Also, the toothed portion of the first display wheel, which is located in the drive path of the third driving finger corresponding to a predetermined period of time during which the fourth driving finger drives, for correction, the toothed portion of the second display wheel, may be provided with a toothless portion for avoiding engagement with the third driving finger. With the above, the structure for corrective drive can be simplified.
Also, an abutment portion to abut on the toothed portion may be provided on at least one of the third driving finger and the fourth driving finger. With the above, the structure for corrective driving can be simplified.
Also, the abutment portion of the third driving finger may be inserted into the toothless portion whereby the fourth driving finger is introduced to the drive path for engagement with the toothed portion of the second display wheel. With the above, the structure for corrective driving can be simplified.
Also, the third driving finger and the fourth driving finger may each have a reversal mechanism for enabling a predetermined shaft to change a rotational center position thereof. With the above, the structure for corrective driving can be simplified.
Also, the first display wheel may have a first toothless portion for avoiding engagement with the first driving finger and a second toothless portion for avoiding engagement with the third driving finger. With the above, alignment between the driving structure and the correction driving structure of the display wheel can be attained using a simple structure.
Also, the first toothless portion may be formed on an upper surface side of the toothed portion of the first display wheel, and the second toothless portion may be formed on a lower surface side of the toothed portion of the first display wheel. With the above, matching between the driving structure and the correction driving structure of the display wheel can be attained using a simple structure.
Also, the toothed portion of the first display wheel may include sixteen teeth, the denotation portion on the first display wheel may have denotations of dates 16th to 31st, the toothed portion of the second display wheel may include sixteen teeth, the denotation portion of the second display wheel may have denotations of dates 1st to 15th and the opening formed between the dates 1st and 15th, the first driving finger may air-swing with respect to the first toothless portion of the first display wheel and the second driving finger drives only the second display wheel in feeding from the date 1st to the date 15th, the concurrent drive means may concurrently drive the first display wheel and the second display wheel in feeding from the date 15th to the date 16th, the abutment portion may abut on the toothed portion of the first display wheel, so that the second driving finger is apart from the toothed portion of the second display wheel, and only the first display wheel is driven by the first driving finger, in feeding from a date 17th to a date 31st, and the abutment portion and the first driving finger may be inserted into the first toothless portion with only the second display wheel being driven by the second driving finger in feeding from the date 31st to the date 1st.
With the above, display which is easy to see with information displayed in large characters, and size reduction and simplification of a structure, can be attained, and alignment between the driving structure and the correction driving structure of the display wheel can be attained using a simple structure.
Also, the toothed portion of the first display wheel may include sixteen teeth, the denotation portion on the first display wheel may have denotations of a date 16th to a date 31st, the toothed portion of the second display wheel may include sixteen teeth, the denotation portion of the second display wheel may have denotations of a date 1st to a date 15th and the opening formed between the date 1st and the date 15th, the third driving finger air-swings with respect to the second toothless portion, and the fourth driving finger may drive only the second display wheel in correction from the date 1st to the date 15th, the concurrent drive means may concurrently drive the first display wheel and the second display wheel in correction from the date 15th to the date 16th, the abutment portion may abut on the toothed portion of the first display wheel, so that the fourth driving finger is apart from the toothed portion of the second display wheel, and only the first display wheel is driven by the third driving finger, in correction from the date 17th to the date 31st, and the abutment portion and the third driving finger may be inserted into the second toothless portion and only the second display wheel is driven by the fourth driving finger in correction from the date 31st to the date 1st.
With the above, display which is easy to see with information displayed in large characters, and size reduction and simplification of a structure, can be attained, and matching between the driving structure and the correction driving structure of the display wheel can be attained using a simple structure.
Also, when the display device is a timepiece calendar device, display which is easy to see with large calendar display, and size reduction and simplification of the structure, can be attained.
In the following, embodiments of the present invention will be described with reference to the accompanying drawings.
(1)
The calendar device 2 of the timepiece 1 in this embodiment comprises a first date indicator 10 as a first display wheel, a second date indicator 20 as a second display wheel, a date jumper mechanism 26M, a date indicator drive control portion (a date indicator driving mechanism in this example) 30M, and a date correction mechanism 50M, in which the first date indicator 10 and the second date indicator 20 are placed one on top of the other.
(2) Initially, with reference to
(a) First Date indicator 10, Second Date indicator 20
The first date indicator 10 and the second date indicator 20 are placed on the other. The annular first date indicator 10 has, on the front surface thereof, a denotation portion 10b showing a partial period of a calendar and a toothed portion 10a to be driven. The annular second date indicator 20 (an upper date indicator) has, on the front surface thereof, a denotation portion 20b showing a partial period of the calendar, other than that which is shown on the first date indicator 10, an opening 22 via which to expose the first date indicator 10, and a toothed portion 20a to be driven. The toothed portions 10a, 20a of the first date indicator 10 and the second date indicator 20, respectively, are formed so as to rotate along identical paths in a plan view (the paths are shown completely overlapped in a plan view in this embodiment).
With the date indicators in this embodiment, the first date indicator (the lower date indicator) 10 has, on the upper surface side thereof, date denotations from the 16th to the 31st, and a partially disconnected groove, or an arc groove 12 here (schematically shown in a plan view in
It should be noted here that although the arc groove 12 is formed on the first date indicator 10 and the projection 24 is formed on the second date indicator 20 in this example, the arc groove 12 may be formed on the second date indicator 20 and the projection 24 may be formed on the first date indicator 10.
The toothed portion 10a of the first date indicator (the lower date indicator) 10 has a first toothless portion 10c for accepting a first driving finger 35 and a closer abutment portion 34 of a date indicator driving wheel 30, to be described later, when the denotation of the date 31st is located below the display window 100 of the dial (shown in
As will be described later, in a relationship with the corrector setting wheel 50, similarly, the toothed portion 10a of the first date indicator (the lower date indicator) 10 has a second toothless portion 10d for accepting a third driving finger 55 and a closer abutment portion 54 when the denotation of the date 31st is located below the display window (the window on the dial) 100 defined on the dial (shown in
(b) Date Jumper Mechanism 26M
The date jumper mechanism 26M has two identically shaped date jumpers 26, 26, placed one on top of the other, for causing the two date indicators to jump. The date jumper mechanism 26M has date jumpers 26, 26 having mountain-like jumper portions 26a, 26a for contacting the toothed portion 10a of the first date indicator 10 and the toothed portion 20a of the second date indicator 20, respectively, and spring portions 26c, 26c extending on the other side relative to the rotational shaft 26b, and guard portions 28 fixed on the substrate (the main plate 3 here) and for abutting on the ends of the spring portions 26c, 26c. The date jumper mechanism 26M causes the first date indicator 10 and the second date indicator 20 to jump. As two identically shaped date jumpers 26, 26 are placed one on top of the other, as described above, the date jumpers 26, 26, and thus the date jumper mechanism 26M, can be formed smaller in size in a plan view. As the first toothless portion 10c and the second toothless portion 10d of the first date indicator 10 in this embodiment have teeth formed thin in the width direction, rather than removed, the date jumpers 26, 26 may be fit into one space between the teeth of the first date indicator 10 and that of the second date indicator 20, respectively. This makes possible the use of a date jumper having a general shape, rather than a special shape.
(c) Date Indicator Drive Control Portion (Date Indicator Driving Mechanism in this Example) 30M
The date indicator drive control portion (the in this example) 30M comprises a date indicator driving wheel 30, a driving finger (a date dial driving finger here) 33, mounted on the date indicator driving wheel 30 and for driving the first date indicator 10 and the second date indicator 20 to rotate, and a path switching means 40 (here comprising an abutment portion 34, formed close to the date dial driving finger 33, and the toothed portion 10a of the first date indicator 10 for contacting the abutment portion 34). The driving finger (the date dial driving finger here) 33 causes the shaft 30a of the date indicator driving wheel 30 to be fitted into the long hole 33c and the pin 30c of the date indicator driving wheel 30 to be engaged with a stopper wall 33e. Further, the driving finger (the date dial driving finger here) 33 comprises a first driving finger 35 for driving the toothed portion 10a of the first date indicator 10, a second driving finger 37 for driving the toothed portion 20a of the second date indicator 20, both fingers 35, 37 being integrally formed, and an abutment portion 34, or a part of the path switching means 40, as described above.
When the second date indicator 20 is placed on the first date indicator 10 and the date indicators are alternatively driven for a predetermined period of time, the front surface of one of the date indicators is exposed through the window 100 defined on the dial to thereby display the calendar. When the first driving finger 35 drives the toothed portion 10a of the first date indicator 10, the path switching means 40 causes the second driving finger 37 to be displaced from the drive path to thereby avoid engagement with the toothed portion 20a of the second date indicator 20. This is the first engagement state. The path switching means 40 is a timepiece component (the toothed portion 10a of the first date indicator 10, as described above, in this example) which appears in the driving area of the driving finger 33 during a predetermined period of time during which the toothed portion 10a of the first date indicator 10 is driven, and contacts the abutment portion 34 of the driving finger 33 to switch the drive path of the second driving finger 37 to the avoidance path.
The toothed portions 10a, 20a of the first date indicator 10 and the second date indicator 20 are formed so as to rotate along substantially identical paths (the paths are shown completely overlapped in a plan view here). The first driving finger 35 and the second driving finger 37 are integrally formed so as to be rotatably driven around a predetermined rotational center (which is tentatively indicated as 33d in
The toothed portion 10a of the first date indicator 10, which is located in the drive path of the first driving finger 35 corresponding to a predetermined period of time in which the second driving finger 37 drives the toothed portion 20a of the second date indicator 20, is provided with a first toothless portion 10c for avoiding engagement with the first driving finger 35 (indicated by the dot line in
Therefore, in this example, the path switching means 40 having the toothless portion 10c and the abutment portion 34 and for causing the first driving finger 35 and the second driving finger 37 to be displaced from the driving path constitutes an engagement state generation means for generating the first engagement state and the second engagement state.
The engagement state switching means for switching the first and second engagement states has concurrent drive means for concurrently driving the first date indicator 10 and the second date indicator 20 to thereby move the first toothless portion 10c located in the drive tracks of the driving fingers 35, 37. The concurrent drive means causes the projection 24 of the second date indicator 20 to be engaged with the arc groove 12 of the first date indicator 10, and concurrently feeds the date indicators 10, 20 by utilizing the pressing/pulling relationship between the groove wall 14 of the arc groove 12 and the projection 24.
The driving finger 33 has a long hole 33c for enabling a predetermined shaft to change the rotational center position thereof, and is urged towards the toothed portions 10a, 20a of the first date indicator 10 and the second date indicator 20, respectively, by the spring member (a regulation spring here) 38. The regulation spring 38 has an end to be inserted into the long groove 33a defined on the driving finger (the date dial driving finger) 33 to thus press the interior wall 33b of the long groove to thereby urge the driving finger 33 towards the toothed portions 10a, 20a.
The first driving finger 35 and the second driving finger 37 may be formed separate. In order to separately form the first driving finger 35 and the second driving finger 37, it may be arranged such that the rotational centers of the first driving finger 35 and the second driving finger 37 are separately formed on the date indicator driving wheel 30. Alternatively, it may be arranged such that the first driving finger 35 may be mounted on the date indicator driving wheel 30 such that the shaft 30a is inserted into the long hole 33c and that the second driving finger 37 is engaged with the shaft, mounted on the first driving finger 35 and serving as the rotational center. The abutment portion 34 may be provided to at least one of the first driving finger 35 and the second driving finger 37.
(3) In the following, with reference to
As shown in
As shown in
(4) In the following, with reference to
In
The positions where the toothed portions 10a, 20a of the date indicators 10, 20 are engaged with the date dial driving finger 33 are indicated by the line F. The positions where the toothed portions 10a, 20a of the date indicators 10, 20 are engaged with the correction finger 53 of the corrector setting wheel 50 are indicated by the line E. The positions of the first toothless portion 10c and the second toothless portion 10d, formed in the toothed portion 10a of the first date indicator, are shown in the respective drawings. In
In
In
In the first embodiment, the first date indicator 10 and the second date indicator 20 are concurrently driven once.
In
In this state, the first toothless portion 10c of the toothed portion 10a of the first date indicator 10 is located short of the line F by one tooth. Therefore, the second date indicator 20 remains still and only the first date indicator 10 is driven by one day. Consequently, the date on display shifts from the date 30th, shown in
It should be noted that in a short month, the fact that the date 31st is not needed is compensated for by advancing the timepiece hand or using the date correction mechanism.
For backward rotation (reverse rotation) for correction, the first driving finger 35 and the second driving finger 37 of the date dial driving finger 33 have slope surfaces in the direction opposite from the feeding direction (shown in
(5) In the following, with reference to
The date correction mechanism 50M comprises a corrector setting wheel 50, a date corrector setting transmission wheel III 63, a date corrector setting transmission wheel II 61, and a date corrector setting transmission wheel I 59 for transmitting a correction rotational force from the crown 6 via the hand setting stems 6a. The corrector setting wheel 50 fixedly holds the date corrector finger 53. The date corrector finger 53 comprises a third driving finger 55 for correctively driving the toothed portion 10a of the first date indicator 10 and a fourth driving finger 57 for correctively driving the toothed portion 20a of the second date indicator 20, and is formed so as to integrally drive for rotation around a predetermined rotational center as a reference axis.
The engagement portion 55a of the third driving finger 55 is positioned closer to the toothed portions 10a, 20a of the date indicators 10, 20 than the engagement portion 57a of the fourth driving finger 57. That is, the length from the predetermined rotational center (the shaft center of the corrector setting wheel 50) to the engagement portion 55a of the third driving finger 55 is determined longer than the length from the predetermined rotational center (the shaft center of the corrector setting wheel 50) 50a to the engagement portion 57a of the fourth driving finger 57. The shaft of the corrector setting wheel 50 is inserted, on the upper and lower ends thereof, into the arc-shaped long hole 3c defined on the main plate 3 and the identically shaped, in plan view, long hole 4c defined on the holder plate 4, so that the shaft of the corrector setting wheel 50 slides in the long holes 3c, 4c.
The toothed portion 10a of the first date indicator 10, which is located on the drive path of the third driving finger 55 corresponding to a period of time in which the fourth driving finger 57 drives, for correction, the toothed portion 20a of the second date indicator 20, is provided with a second toothless portion 10d for avoiding engagement with the third driving finger 55. With the abutment portion 54 of the driving finger (the date corrector finger here) 53 inserted into the second toothless portion 10d, the fourth driving finger 57 is introduced to the drive path for engagement with the toothed portion 20a of the second date indicator 20. The third driving finger 55 and the fourth driving finger 57 constitute a reverser mechanism for making it possible for a predetermined shaft (the shaft 59a of the date corrector setting transmission wheel I 59 in this embodiment) to change the rotational center position thereof, that is, a reverser mechanism in which the shaft of the corrector setting wheel 50 slides in the arc-shaped long holes 3c, 4c in this example.
As described above, the first date indicator 10 comprises a first toothless portion 10c for avoiding engagement with the first driving finger 35 and a second toothless portion 10d for avoiding engagement with the third driving finger 55. The first toothless portion 10c has tooth partially removed on the upper surface side of the toothed portion 10a of the first date indicator 10 and present on the lower surface side thereof; the second toothless portion 10d has teeth removed on the lower surface side of the toothed portion 10a of the first date indicator 10 and present on the upper surface side thereof.
(6) In the following, an operation of the date correction mechanism 50M will be described.
With the date corrector setting transmission wheel II 61, the date corrector setting transmission wheel I 59, and the corrector setting wheel 50 rotating in the directions indicated by the arrows G, H, I, respectively, shown in
In the following, a second embodiment will be described.
Basically, any structural elements in the second embodiment, which correspond to those in the first embodiment are assigned a reference number with “200”, and “2” added to an alphabetical reference note.
(1)
The calendar device 202 of the timepiece 201 in this embodiment comprises a first date indicator 210 as a first display wheel (a lower date indicator here, the same applies in the following), a second date indicator 220 as a second display wheel (an upper date indicator here, same in the following), a date jumper mechanism 226M, a date indicator drive control portion (a date indicator driving mechanism in this example) 230M, and a date correction mechanism 250M, in which the first date indicator 210 and the second date indicator 220 are placed one on top of the other.
(2) With reference to
(a) First Date Indicator 210, Second Date Indicator 220
The first date indicator 210 and the second date indicator 220 are placed one on top of the other. The annular first date indicator 210 has a denotation portion 210b showing a partial period of a calendar on the front surface thereof and a toothed portion 210a to be driven. The annular second date indicator (the upper date indicator) 220 has a denotation portion 220b showing a partial period of the calendar other than that which is shown on the first date indicator 210 on the front surface thereof, an opening 222 via which expose the first date indicator 210 is exposed, and a toothed portion 220a to be driven. The toothed portions 210a, 220a of the first date indicator 210 and the second date indicator 220 are formed so as to rotate along the identical paths in a plan view (the paths are shown completely overlapped in a plan view in this embodiment).
In the date indicators in this embodiment, the first date indicator (the lower date indicator) 210 has, on the upper surface side thereof, a date denotation portion including denotations of the dates 17th to 31st and two blank spaces, or information-free portions (calendar-free portions) SP1, SP2, and a partially disconnected groove, or an arc groove 212 here (schematically shown in a plan view in
The toothed portion 210a of the first date indicator (the lower date indicator) 210 has a first toothless portion 210c for enabling the driving finger 233 of the date indicator driving wheel 230, to be described later, to air-swing with respect to the toothed portion 210a when the denotation of the information-free portion (the calendar-free portion) SP1 is located below the display window 300 of the dial (shown in
Also, the toothed portion 220a of the second date indicator (the upper date indicator) 220 has a third toothless portion 220c for enabling the driving finger 233 of the date indicator driving wheel 230, to be described later, to air-swing with respect to the toothed portion 220a when the opening 222 is located below the display window 300 of the dial (shown in
These operations will be described later in detail with reference to
Although the details will be described later, in relationship with the corrector setting wheel 250, similarly, the toothed portion 210a of the first date indicator (the lower date indicator) 210 has a second toothless portion 210d for enabling the third driving finger 255 of a corrector setting wheel 250, to be described later, to air-swing with respect to the toothed portion 210a when the information-free portion (the calendar-free portion) SP1 in the space portion is located below the display window (the window on the dial) 300 of the dial (shown in
Although the details will be described later, in relationship with the corrector setting wheel 250, similarly, the toothed portion 220a of the second date indicator (the upper date indicator) 220 has a fourth toothless portion 220d for enabling the fourth driving finger 257 of the corrector setting wheel 250, to be described later, to air-swing with respect to the toothed portion 220a when the opening 222 is located below the display window 300 defined on the dial (shown in
In correcting the denotations on the date indicators with the corrector setting wheel 250 from the date 18th to the date 19th, for example, the second date indicator (the upper date indicator) 220 is not fed due to the presence of the fourth toothless portion 220d, and instead, the third driving finger 255 feeds only the toothed portion 210a of the first date indicator (the lower date indicator) 210 such that the denotation of the date 19th is shown.
In the second embodiment also, the first toothless portion 210c and the second toothless portion 210d of the first date indicator 210 and the third toothless portion 220c and the fourth toothless portion 220d of the second date indicator 220 have teeth formed thin in the width direction, rather than removed. Thus, teeth are present all along the toothed portions.
(b) Structure of Date Jumper Mechanism 226M
The date jumper mechanism 226M has two identically shaped date jumpers 226, 226, placed one on top of the other, for causing the two date indicators 210, 220 to jump. The date jumper mechanism 226M has date jumpers 226, 226 having mountain-like jumper portions 226a, 226a for contacting the toothed portion 210a of the first date indicator 210 and the toothed portion 220a of the second date indicator 220, respectively, and spring portions 226c, 226c extending on the other side relative to the rotational shaft 226b, and guard portion 228 fixed on the substrate (the main plate here) and for abutting on the ends of the spring portions 226c, 226c. As described above, the first date indicator 210 and the second date indicator 220 are caused to jump. As the two identically shaped date jumpers 226, 226 are placed one on top of the other, the date jumpers 226, 226, and thus the date jumper mechanism 226M, can be formed smaller in size in a plan view. As the first toothless portion 210c and the second toothless portion 210d of the first date indicator 210 and the third toothless portion 220c and the fourth toothless portion 220d of the second date indicator 220 in this embodiment have teeth formed thin in the width direction, rather than removed, the date jumpers 226, 226 are fitted into one space between the teeth of the first date indicator 210 and that of the second date indicator 220, respectively. This makes possible the use of a date jumper having a general shape, rather than a special shape.
(c) Structure of Date Indicator Drive Control Portion (Date Indicator Driving Mechanism in this Example) 230M
The date indicator drive control portion (the date indicator driving mechanism in this example) 230M comprises a date indicator driving wheel 230, a driving finger (a date dial driving finger here) 233, fixedly mounted on the date indicator driving wheel 230 and for driving the first date indicator 210 and the second date indicator 220 to rotate, a toothed portion 210a of the first date indicator 210 and a toothed portion 220a of the second date indicator 220, both for contacting the driving finger 233, the groove (an arc groove in this example) 212 of the first date indicator 210, and the projection 224 of the second date indicator 220. The driving finger 233 has a notch 233f formed thereon in the rotational direction, which realizes an elastic structure of the driving finger 244 for enabling the tip end of the driving finger 233 to flex so that the driving finger 233 can escape when pressed by the toothed portions 210a, 220a of the date indicators from the direction (rear direction) opposite to the ahead direction A2 in the correction operation by the date correction mechanism 250M. The toothed portion 210a of the first date indicator 210 is provided with the above-described first toothless portion 210c, and the toothed portion 220a of the second date indicator 220 is provided with the above-described third toothless portion 220c, the toothless portions both constituting a part of the date indicator drive control portion (the date indicator driving mechanism in this example) 230M.
The toothed portions 210a, 220a of the first date indicator 210 and the second date indicator 220 are formed so as to rotate along substantially identical paths (the paths are shown completely overlapped in a plan view here). The driving finger 233 fixed on the date indicator driving wheel 230 rotates together with the date indicator driving wheel 230 to thereby feed the toothed portions 210a, 220a. As described above, with the second date indicator 220 placed on the first date indicator 210 and driving the respective date indicators every predetermined period of time, the denotation portion on one of the dials is exposed in the display window 300 on the dial, whereby the calendar is shown.
Therefore, the date indicator drive control portion 230M generates a first engagement state in which the driving finger 233 is engaged with the toothed portion 210a of the first date indicator 210 but not with the toothed portion 220a of the second date indicator 220 when the denotation portion 210b of the first date indicator 210 shows the information about a partial period through the opening 222 defined on the second date indicator 220 and in the window (the display window on the dial). The date indicator drive control portion 230M also comprises engagement state generation means for generating a second engagement state in which the driving finger 233 is engaged with the toothed portion 220a of the second date indicator 220 but not with the toothed portion 210a of the first date indicator 210 when the denotation portion 220b of the second date indicator 220 shows the information about the other period in the window 300, and engagement state switching means for switching the engagement states of the driving finger 233 relative to the toothed portions 210a, 220a of the first date indicator 210 and the second date indicator 220, respectively, to thereby mutually switch the first engagement state and the second engagement state.
The engagement state generation means is formed by an air swing generation portion, including the first toothless portion 210c and the third toothless portion 220c in this example, for enabling the driving finger 233 to air-swing with respect to either the date indicator 210 or 220, to thereby stop one of the first date indicator 210 and the second date indicator 220, so that the other date indicator alone is driven, depending on whether or not the toothless portions 210c, 220c provided on the toothed portion 210a of the first date indicator 210 or the toothed portion 220a of the second date indicator 220, respectively, is located within the drive track of the driving finger 233.
The engagement state switching means has concurrent drive means for concurrently driving the first date indicator 210 and the second date indicator 220 to thereby move the toothless portions 210c, 220c, located in the drive track of the driving finger 233. The concurrent drive means causes the projection 224 of the second date indicator 220 to be engaged with the arc groove 212 of the first date indicator 210 to thereby concurrently feed the date indicators 210, 220 by utilizing the pressing/pulling relationship between the groove walls 214a, 214b of the arc groove 212 and the projection 224. It should be noted that although the arc groove 212 is formed on the first date indicator 210 and the projection 224 is formed on the second date indicator 220 in this example, the arc groove 212 may be formed on the second date indicator 220 and the projection 224 may be formed on the first date indicator 210.
(3) In the following, with reference to
As shown in
As shown in
(4) In the following, with reference to
In
The positions where the driving finger (the date indicator driving finger in this example) is engaged with the toothed portions 210a, 220a of the date indicators 210, 220 are indicated by the line F2. The positions where the correction finger 253 of the corrector setting wheel 250 is engaged with the toothed portions 210a, 220a of the date indicators 210, 220 are indicated by the line E2. In the respective drawings, the positions of the first toothless portion 210c (a white triangle Δ is attached to the position of the first toothless portion in
Here, the first toothless portion 210c and the third toothless portion 220c are toothless portions for date feeding; the second toothless portion 210d and the fourth toothless portion 220d are toothless portions for correction. As shown in
The first toothless portion 210c relates to stopping of the first date indicator 210 when normally driving the date dial; the second toothless portion 210d relates to stopping of the first date indicator 210 when correcting the dates.
The third toothless portion 220c relates to stopping of the second date indicator 220 in normally driving the date dial; the fourth toothless portion 220d relates to stopping of the second date indicator 220 when correcting the dates.
The arrow A2 indicates the rotation direction of the date indicators 210, 220. In
In
In
The denotation for the next day, that is, the date 16th, is described on the second date indicator 220. As the toothed portion 220a of the second date indicator 220, which is then opposed to the driving finger 233, has a normal shape, rather than the third toothless portion 220c, the toothed portion 220a of the second date indicator 220 is driven by the driving finger 233, so that the denotation of the date 16th appears in the display window 300. Simultaneously with the second date indicator 220 rotating, the projection 224 of the second date indicator 220 presses the groove wall 214b of the arc groove 212 of the first date indicator 210, whereby the first date indicator 210 moves in association with the second date indicator 220, resulting in the state shown in
In
In feeding to the next day, that is, the date 17th, the normal toothed portion 210a of the first date indicator 210 and the normal toothed portion 220a of the second date indicator 220 are driven by the driving finger 233, whereby, similar to the feeding from the date 15th to the date 16th, the projection 224 of the second date indicator 220 presses the groove wall 214b of the arc groove 212 of the first date indicator 210, whereby the first date indicator 210 moves in association. As described above, the denotation of the date 17th is displayed, shown in
In the second embodiment, the first date indicator 210 and the second date indicator 220 are concurrently driven three times, or the number obtained by adding one to the number of the information-free portions, namely, two.
In
Therefore, feeding to the next day, that is, the date 18th, is carried out by only the driving finger 233 driving the toothed portion 210a of the first date indicator 210, and the second date indicator 220 is not fed, with the opening 222 remaining in the current position in
This operation for shifting from the date 17th to the date 18th, in which the second date indicator 220 remains still and only the first date indicator 210 is driven for every day, is continued until the date 31st, shown in
In this state, the first toothless portion 210c of the toothed portion 210a of the first date indicator 210 is located short by one tooth of the line F2, and the driving finger is located in the third toothless portion 220c. Therefore, the second date indicator 220 remains still and only the first date indicator 210 is driven for one day by the driving finger 233. However, concurrently, the groove wall 214a of the arc groove 212 of the first date indicator 210 presses the projection 224 of the second date indicator 220; the first date indicator 210 and the second date indicator 220 thus rotate; and the date on display shifts from the date 31st, shown in
The description with reference to
The relationship between the groove walls 214a, 214b of the arc groove 212 and the projection 224 is illustrated between the larger and smaller wheels in the respective positions. The engagement relationship between the driving finger (the date dial driving finger) 233 and the toothed portions 210a, 220a of the first date indicator 210 and the second date indicator 220, respectively, are illustrated in the space below the respective cross sectional views, with the first toothless portion 210c and the second toothless portion 220c particularly focused on.
For backward rotation (reverse rotation) of the timepiece hand for correction, the driving finger (the date dial driving finger) 233 has a slope portion on the rear side of the finger in the direction opposite from the feeding direction, and a notch 233f for enabling the tip end of the finger to flex (shown in
(5) Structure of Date Correction Mechanism 250M
In the following, with reference to
The date correction mechanism 250M comprises a corrector setting wheel 250, a date corrector setting transmission wheel III 263, a date corrector setting transmission wheel II 261, and a date corrector setting transmission wheel I 259 for transmitting a correction rotational force from the crown 206 via the hand setting stem 206a. The corrector setting wheel 250 fixedly holds the date corrector finger 253. The date corrector finger 253 comprises a third driving finger 255 for correctively driving the toothed portion 210a of the first date indicator 210 and a fourth driving finger 257 for correctively driving the toothed portion 220a of the second date indicator 220, and is integrally driven for rotation around the shaft 250a fixed to the substrate (a main plate in this example) 203.
The third driving finger 255 and the fourth driving finger 257 have an identical shape in a plan view. The corrector setting wheel 250 is stably held fitted to the shaft 250a and being pressed on the upper side thereof by the holder plate 204. The shaft 250a for the corrector setting wheel 250 is not held in the manner of sliding in the long hole in this example, and escapes from the date indicator rotating by the date indicator driving mechanism 230M, by utilizing a mechanism in which the corrector setting wheel 250 freely rotates as the date corrector setting transmission wheel III 263 remains disengaged with the date corrector setting transmission wheel II 261 at any time other than when transmitting a correction rotational force via the hand setting stem 206a.
The toothed portion 210a of the first date indicator 210, which is located in the drive path of the third driving finger 255 corresponding to a predetermined period of time in which the fourth driving finger 257 drives, for correction, the toothed portion 220a of the second date indicator 220, is provided with a second toothless portion 210d for avoiding engagement with the third driving finger 255. Due to the presence of the second toothless portion 210d, the third driving finger 255 makes an air-swing. Also, the toothed portion 220a of the second date indicator 220, which is located in the drive path of the fourth driving finger 257 corresponding to a predetermined period of time in which the third driving finger 255 drives, for correction, the toothed portion 210a of the first date indicator 210, is provided with a fourth toothless portion 220d for avoiding engagement with the fourth driving finger 257. Due to the presence of the fourth toothless portion 220d, the fourth driving finger 257 makes an air-swing.
As described above, the second toothless portion 210d has a toothed portion 210a of the first date indicator 210 having teeth removed on the lower surface side thereof and teeth present on the upper surface side thereof, as shown in
(6) In the following, an operation of the date correction mechanism 250M will be described.
The corrector setting wheel 250, the date corrector setting transmission wheel I 259, and the date corrector setting transmission wheel II 261 rotate via the crown 206, the hand setting stem 206a, and the date corrector setting transmission wheel III 263 in the directions indicated by the arrows G2, H2, I2, respectively, shown in
Therefore, from the date 1st to the date 15th, the fourth driving finger 257 sequentially feeds the second date indicator 220 alone in the direction indicated by the arrow A2 in
In the above-described first and second embodiments, a structure of a date correction mechanism in which the date indicator drive control portions (the date indicator driving mechanism) 30M, 230M do not interfere with the date correction mechanisms 50M, 250M is obtained, and the mutual positional relationship is not limited to a particular position when the positional relationship with respect to the toothed portion is matched.
In the above, it is described that the first to fourth toothless portions 10c, 10d, 20c, 20d, 210c, 210d, 220c, 220d are thin toothed portions where the toothed portions 10a, 20a, 210a, 220a are partially removed in the width direction, but these may be toothless portions with the teeth removed in the entire area.
Although it is described that the toothed portions 10a, 20a each have sixteen teeth in the first embodiment and the toothed portions 210a, 220a each have seventeen teeth in the second embodiment, seventeen or more teeth may be formed on the date indicator. For example, in the case of eighteen teeth, the first date indicator (the lower date indicator) may have denotations of the dates from 18th to 31st and four information-free portions, and the second date indicator (the upper date indicator) may have denotations of the dates from 1st to 17th and an opening. In this case, the date indicators are concurrently driven five times.
Although examples in which the toothed portions 10a, 20a, 210a, 220a have sixteen, seventeen, and eighteen teeth are described in the above, the display wheel having three or more teeth is applicable to the present invention.
In the above, although a timepiece calendar device is described as an example of a display device, the present invention is applicable to, for example, a display device for displaying information, such as mode switch information, day of the week, lunar age, am/pm, or city names in a world clock, using a rotating display wheel.
As described above, the display device and the timepiece calendar device according to the present invention are useful for showing the letters and numbers of a display device in large size, and in particular can be utilized in a display device, such as a display device, a wrist timepiece, and a small clock, or the like, where denotation is often small.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2005-099724 | Mar 2005 | JP | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/JP2006/306583 | 3/29/2006 | WO | 00 | 10/1/2007 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2006/106787 | 10/12/2006 | WO | A |
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| Number | Date | Country | |
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| 20090303841 A1 | Dec 2009 | US |
