Information
-
Patent Grant
-
6807282
-
Patent Number
6,807,282
-
Date Filed
Friday, April 5, 200222 years ago
-
Date Issued
Tuesday, October 19, 200419 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
- Nixon Peabody LLP
- Studebaker; Donald R.
-
CPC
-
US Classifications
Field of Search
-
International Classifications
-
Abstract
There is a terminal block with leaf spring metal terminals that extend downward from a housing on the side opposite the open end of the housing in which a diaphragm is fitted and fixed, and an elastic material functions as a pad that is sandwiched between the surface of a circuit board and the open side of the housing on the side from which the metal terminals project, with the metal terminals pressed against the conduction pattern of the circuit board to make an electrical connection. Alternatively, the contact point that is connected electrically to the conductive pattern of the circuit board is on the side on which the diaphragm is mounted and the metal terminals have flat plates for electrical connection of voice coil lead wires on the side opposite that where the diaphragm is mounted, so that the voice coil lead wires extend outside the housing and are connected electrically to the flat plates of the metal terminals on the side opposite the side where the diaphragm is mounted, and the side where the diaphragm is mounted faces the surface of the circuit board and away from the inside of the outer casing of the equipment.
Description
FIELD OF INDUSTRIAL USE
This invention is primarily a vibration generator; it concerns improvement of electromagnetic induction actuators with the function of generator a ring or buzz; a structure for mounting an electromagnetic induction actuator that is improved by means of a more secure electrical connection between the electromagnetic induction actuator and the conduction pattern of the circuit board; and portable information equipment, including portable telephones, that is fitted with electromagnetic induction actuators.
PRIOR ART
Generally speaking, electromagnetic induction actuators have, as shown in
FIG. 36
, a cylindrical housing
10
that encloses a magnetic circuit that consists of a pole piece
13
, a magnet
11
connected to the pole piece
13
, and a yoke
12
that holds the magnet
11
to the pole piece
13
separated by an electromagnetic gap G; the magnetic circuit is suspended within the housing
10
by spring suspension
14
a
,
14
b
; there is a diaphragm
15
with a voice coil
16
mounted inward from the diaphragm
15
, of which the voice coil
16
is inserted into the electromagnetic gap G between the pole piece
13
and the yoke
12
and the diaphragm
15
is suspended at the framework
10
a
of the housing
10
; metal terminals
58
a
,
58
b
are attached to the terminal block
10
d
that projects from the end of the housing
10
, and the voice coil
16
is electrically connected to the metal terminals
58
a
,
58
b.
This electromagnetic induction actuator is constituted such that the magnetic action of the magnet
11
and the current applied on the voice coil
16
cause vibration of the springs
14
a
,
14
b
that support the magnetic circuit when a low frequency signal is applied, and a ring or buzz from the diaphragm
15
when a high frequency signal is applied.
To electrically connect between the conduction pattern on the circuit board inside the portable telephone or other portable information equipment to the voice coil in order to vibrate during operation, the conventional electromagnetic induction actuator described above uses a flexible cord that extends from a metal terminal that is electrically connected to the voice coil. This flexible cord itself can withstand vibration, but there is a problem in that contact is easily broken because of the load placed on the contact with the metal terminal or the contact with the conductive pattern on the circuit board.
Therefore, in order to resolve such problems, proposals have been made for the electrical connection between the vibration mechanism and the conduction pattern on the circuit board, including a method of extending a leaf spring at a slant from the case of an eccentric weight vibration mechanism have an eccentric weight and pressing it against the power feed land to make an electrical connection between the vibration mechanism and the conduction pattern of the circuit board, (JPO Kokai Patent Report H11-136901 of 1999), and a method of pressing the leaf spring against the power feed land by using an elastic pressure body attached to the outside of the vibration mechanism case to make an electrical connection between the vibration mechanism and the conductive pattern of the circuit board (JPO Kokai Patent Report 2000-78790).
In the case of these leaf spring electrical contacts, however, it is necessary to mount the vibration mechanism with accurate positioning that maintains a steady gap between the vibration mechanism and the surface of the printed circuit board. When the leaf spring is pressed by an elastic pressure body attached to the outside of the vibration mechanism case, especially, excessive pressure on the leaf spring is liable to cause it to eat into the elastic pressure body, causing poor contact.
Moreover, the conventional electromagnetic induction actuator shown in
FIG. 36
is mounted in the case of the portable telephone or other equipment by placing the side where the diaphragm
15
attaches toward the outer casing of the portable information equipment and the side where the cover
18
attaches toward the surface of the circuit board, and electrically connecting the metal terminals
58
a
,
58
b
to the conduction pattern of the circuit board.
With the electromagnetic induction actuator described above, in order to increase the speed of the physically heavy magnetic circuit as it vibrates, flux leakage from the magnetic circuit modulates the vibration frequency and creates an alternating magnetic field; this creates an alternating magnetic field leak outside the portable electronic equipment from the side where the diaphragm
15
attaches, and so there is concern about the effect on magnetic memory cards outside the equipment.
One conceivable way to prevent the effects of this alternating magnetic field is to turn the side where the cover
18
is mounted, where there is little flux leakage, toward the outer casing of the equipment instead of the side where the diaphragm
15
is mounted, and placing it inside the telephone or other equipment with the diaphragm
15
side toward the surface of the circuit board.
However, if the electromagnetic induction actuator described above is simply reversed, the side where the leads
8
a
,
8
b
of the voice coil
16
are soldered to the metal terminals
58
a
,
58
b
will be positioned opposite the conduction pattern of the circuit board, and so there is a danger that the solder mound will interfere with the electrical contact between the metal terminals
58
a
,
58
b
and the conduction pattern of the circuit board.
In view of the problems described above, first of all, a sure means of conduction between the voice coil and the conduction pattern of the circuit board without using a flexible cord is desired.
Second, and even better, a means of resolving the problem of flux leakage in addition to the sure means of conduction is desired.
Accordingly, the purpose of this invention is to enable a sure electrical connection by pressing the metal terminals of the vibration mechanism against the conduction pattern of the circuit board while maintaining the relative gap between the vibration mechanism and the circuit board, and also to provide a structure for mounting the electromagnetic induction actuator that is improved so as to prevent damage to the internal mechanism due to impact, and to prevent resonance that would result from excessive vibration of the ringing mechanism being transferred to the circuit board or the outer casing.
A further purpose is to provide a structure for mounting the electromagnetic induction actuator that is improved so as to prevent acoustical leakage within the outer casing and thus improve the acoustic characteristics.
In addition, it has the purpose of providing a structure for mounting the electromagnetic induction actuator that is improved so as to enable simple mounting of the electromagnetic induction actuator while accurately maintaining the relative gap between it and the circuit board.
Moreover, this invention has the primary objective of suppressing the effects of the alternating magnetic field by mounting the electromagnetic induction actuator in the equipment with the side where the diaphragm is mounted turned toward the surface of the circuit board and the opposite side turned toward the cover panel of the equipment, and has the purpose of providing an electromagnetic induction actuator that can be mounted easily within equipment with an electrical circuit connection between the metal terminal and the power feed land of the circuit board.
This invention also has the purpose of providing an electromagnetic induction actuator that firmly attaches the metal terminals to the terminal block of the housing and makes a sure electrical contact with the conduction pattern of the circuit board, and one which is a compact unit overall, as well as the purpose of providing portable telephones and other portable information equipment that suppresses the alternating magnetic field while incorporating an electromagnetic induction actuator as a mechanism for generating vibrations, ringing or buzzing.
DESCRIPTION OF INVENTION
This electromagnetic induction actuator has, within a cylindrical housing, a magnetic circuit that comprises a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece together with the magnet, and a magnetic gap formed between the yoke and the pole piece, the magnetic circuit being suspended within the housing by spring suspension; a diaphragm, which attaches a voice coil on inward surface side, the voice coil projecting into the magnetic gap and the diaphragm extending inside the housing at an open side; metal terminals that are attached to a terminal block that projects outward from the side wall of the housing; and lead wires that electrically connect the voice coil and the metal terminals; in which the metal terminal attached to the terminal block is formed of a leaf spring, so that pressing the terminal fitting against the conduction pattern of a circuit board forms a sure electrical connection to the circuit board.
With this invention, it is possible to assure connectivity between the voice coil and the conduction pattern of the circuit board without using a flexible cord.
Further, the structure for mounting the electromagnetic induction actuator of this invention is one that has within a cylindrical housing, a magnetic circuit that comprises a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece together with the magnet, and a magnetic gap formed between the yoke and the pole piece, the magnetic circuit being suspended within the housing by spring suspensions; a diaphragm, which attaches a voice coil on inward surface side, the voice coil projecting into the magnetic gap and the diaphragm extending inside the housing at an open side; metal terminals that are attached to a terminal block that projects outward from the side wall of the housing; and lead wires that electrically connect the voice coil and the metal terminals, and the structure is formed that connecting the metal terminals against the conduction pattern of a circuit board and providing in outer casing; in which there is the metal terminals attached to the terminal block is formed of leaf springs, and the metal terminals extend to the outward side of the housing that the side is opposite side of the open side of the housing in which the diaphragm is fitted and fixed, and there a pad of elastic material is sandwiched between the open side of the housing and the surface of the circuit board on the side where the metal terminals project, so that pressing the metal terminal against the conduction pattern of the circuit board forms a sure electrical connection to the circuit board.
With this invention, the elastic material is compressed and maintains a certain thickness, and can be placed to maintain the gap between the electromagnetic induction actuator and the surface of the circuit board, so that pressing the metal terminal is deformed by compression and is in very close contact with the conduction pattern of the circuit board and forms a sure electrical connection to the circuit board.
Further, the structure for mounting the electromagnetic induction actuator of this invention has a terminal block with a terminal fitting that is a leaf spring of which the tip is bent in a V shape, with the knuckle slanting outward from the housing, and this leaf spring is pressed flexibly against the conductive pattern of the circuit board to make the electrical connection between the metal terminal and the conduction pattern of the circuit board.
With this invention, the electromagnetic induction actuator is held firmly in place, and at the same time the contact point of the leaf spring that is deformed into a rounded claw shape electrically connects the metal terminal to the conduction pattern of the circuit board.
Also, in the structure for mounting an electromagnetic induction actuator of this invention, there is a bushing of elastic material with circular extension flanges that covers from the outside the side wall of the housing, except for the terminal block for the metal terminals, and that covers the open sides of the housing, such that the extension flange that covers one open side of the housing becomes a pad that is sandwiched between the housing and the surface of the circuit board, and the extension flange that covers the other open side of the housing is positioned inside the outer casing as a seal that surrounds the sound holes.
With this invention, the elastic material can be applied easily, the leaf spring of the metal terminal provides a sure electrical connection, and the extension flanges prevent the resonance and acoustical leakage that would be transferred from the electromagnetic induction actuator to the circuit board or outer casing. The bushing provides good acoustical characteristics and prevents damage to the internal structure due to impact.
In this invention's structure for mounting an electromagnetic induction actuator, there is a projection around the outer periphery of the side wall of the bushing, and an outer casing or circuit board with a stop rim that has a concavity that fits the projection of the bushing, such that fitting the projection of the bushing into the concavity attaches the electromagnetic induction actuator that includes a bushing to the stop rim of the outer casing or circuit board.
With this invention, the electromagnetic induction actuator can be simply fixed within the outer casing while maintaining a fixed gap between the electromagnetic induction actuator and the surface of the circuit board.
In this invention's structure for mounting an electromagnetic induction actuator, there is a housing with plural projections of elastic material at intervals along the outer periphery of the side wall and there is an outer casing or circuit board with a stop rim having concavities into which the projections of the housing fit, such that fitting the projections of the housing into the concavities attaches the electromagnetic induction actuator to the stop rim of the outer casing or circuit board.
With this invention, the projections on the side wall of the housing allow the electromagnetic induction actuator to be simply fixed within the outer casing while maintaining a fixed gap between the electromagnetic induction actuator and the surface of the circuit board.
In this invention's structure for mounting an electromagnetic induction actuator, the elastic material that covers an open side of the housing acts as a pad sandwiched between that open side of the housing and the surface of the circuit board, and the seal material that covers the other open side encloses the sound holes and fits into the inner surface of the outer casing.
With this invention, the pad material and seal material, together with the projections on the side wall of the housing, prevent acoustical leakage and the resonance from vibration produced by the electromagnetic induction actuator that otherwise would be transferred to the circuit board and outer casing.
In this invention's structure for mounting an electromagnetic induction actuator, there is a circular projecting band of elastic material that faces the surface of the circuit board, the circular band being sandwiched between one open side of the housing and the surface of the circuit board as a pad that is deformed by compression.
With this invention, resonance is prevented more surely because the projecting band has a small area of contact with the surface of the circuit board, and the contact is very close.
In this invention's structure for mounting an electromagnetic induction actuator, the electromagnetic induction actuator is suited to mounting within a portable telephone.
With this invention, it is possible to constitute a portable telephone with superior electrical makeup, good acoustical qualities and excellent shock resistance.
This invention's electromagnetic induction actuator has, within a cylindrical housing, a magnetic circuit that comprises a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece together with the magnet, and the magnetic gap formed between the yoke and the pole piece, the magnetic circuit being suspended within the housing by spring suspensions; a diaphragm, which attaches a voice coil on inward surface side, the voice coil projecting into the magnetic gap and the diaphragm extending inside the housing at an open side; metal terminals that are attached to a terminal block that projects outward from the side wall of the housing; and lead wires that electrically connect the voice coil and the metal terminals; in which the metal terminals are made of leaf springs, and the metal terminals comprise contact points that connect electrically to the conduction pattern of the circuit board are on the side where the diaphragm is mounted, and flat plates that are electrically connected to the voice coil lead wires being taken out to the outward side of the housing, additionally these wires are taken out to the side opposite the side where the diaphragm is mounted, and these wires are attached to leaf spring terminal fittings on the side opposite, the voice coil lead wires being divided by positive and negative polarity and electrically connecting the side where the diaphragm is mounted to the flat plates of the metal terminals, with the side where the diaphragm is mounted facing surface of the circuit board, and mounted upside-down in the equipment case.
With this invention, the side where the diaphragm is mounted, where there is much flux leakage, can be placed within the equipment facing the surface of the circuit board, and so the adverse effects of the alternating magnetic field on magnetic storage cards can be suppressed. Moreover, because the voice coil lead wires are soldered on the side of the housing opposite that where the diaphragm is mounted, there is no interference with the electrical circuit contact between the metal terminals and the power feed lands of the circuit board, and so mounting within the equipment can be done easily.
In this invention's electromagnetic induction actuator, the terminal block has in its center a slit that divides it for positive and negative polarities, the voice coil lead wires being taken out to the outward side of the housing go through the slit of the terminal block, and are taken out from the side where the diaphragm is mounted to the opposite side of the side where the diaphragm is mounted, and the lead wires are divided by positive and negative polarity and are connected electrically to the flat plates of the metal terminals.
With this invention, the voice coil lead wires are laid out over a short distance with good stability, and a sure electrical connection with the flat plates of the metal terminals is possible.
In this invention's electromagnetic induction actuator, there is terminal blocks for positive and negative polarity comprise sink in the center of the terminal block, top plates and bottom plates of the sink, and side plates of the sink projecting further than the top plates and the bottom plates, and in which the metal terminals, each having a fitted bend in the center with a left-opening box-shaped, upward from the top of the fitted bend by a given interval is the parallel flat plate to which the lead wire, and downward from the fitted bend the leaf spring extends at a slant and is then rounded upward with a contact point that contact the conduction pattern, such that when the fitted bend is inserted into the sink, and the top plate of the terminal block is clamped between the top of the fitted bend and the flat plate for attachment of a lead wire, the contact point for connection to the conduction pattern of the circuit board projects from the bottom plate, and the terminal fittings is supported by the two side plates, the terminal fittings firmly attached to the terminal block.
With this invention, just pressing the fitted bend into the sink will fix the metal terminal firmly in the terminal block.
In this invention's electromagnetic induction actuator, the metal terminals have a number of teeth projecting outward from both sides of top of the fitting bend and spring arms that extend from the top of the fitting bend, and the terminal blocks has spaces that correspond to thickness of the spring arms and receiving plates that face the top plates on the inner face of side plates, and the spring arms fit between the top plate of the terminal block and the receiving plate of the side plates, and the teeth are compressed by the inner face of side plates, thus, the terminal fittings firmly attached to the terminal block.
With this invention, the metal terminal can be fixed even more firmly in the terminal block.
In this invention's electromagnetic induction actuator, the metal terminals have wing-shaped leaf springs that curves outward at the top of the leaf springs where wing-shaped leaf springs are bent back from the contact points and that extend toward the sides of the terminal block, and the terminal block has receiving plates on the inner wall of its side plates that stop and support the wing-shaped leaf springs when the leaf spring is compressed, such that the metal terminals are mounted in the terminal block by a fitted structure that allows spring movement of the contact points.
With this invention, the metal terminal can move resiliently as the contact point is pressed against the conduction pattern of the circuit board. Because receiving piers press on the side leaf springs and maintain a strong pressure against the conduction pattern, the metal terminals have a sure electrical contact with the conductive pattern of the circuit board.
In this invention's electromagnetic induction actuator, there is a metal terminal which has, running along the center of the curve of the contact point, a projecting band that contacts the power feed land of the circuit board.
With this invention, an even surer electrical contact between the metal terminal and the conductive pattern is possible because there is no distortion of the contact point when pressed firmly against the conduction pattern of the circuit board.
This invention's portable information equipment, such as a portable telephone, produces vibration, an audible ring or buzz by means of an electromagnetic induction actuator.
With this invention, the side of the housing where the diaphragm is mounted, where there is much flux leakage, is mounted within the equipment facing the surface of the circuit board, and so it is possible to have portable information equipment in which the effects of the alternating magnetic field are suppressed.
BRIEF EXPLANATION OF DRAWINGS
FIG. 1
is an explanatory drawing of the internal structure of a portable telephone that applies the structure for mounting the electromagnetic induction actuator of implementation mode
1
of this invention.
FIG. 2
is a cross section showing the structure of the electromagnetic induction actuator used in implementation mode
1
of this invention.
FIG. 3
is a plane view from the diaphragm side of the electromagnetic induction actuator, covered by a bushing, used in the structure for mounting of implementation mode
1
of this invention.
FIG. 4
is a side view of the electromagnetic induction actuator of FIG.
3
.
FIG. 5
is a front view of the electromagnetic induction actuator of FIG.
3
.
FIG. 6
is a back view of the electromagnetic induction actuator of FIG.
3
.
FIG. 7
is a bottom view of the electromagnetic induction actuator of FIG.
3
.
FIG. 8
is a cross section taken at line A—A in
FIG. 3
of the electromagnetic induction actuator of FIG.
3
.
FIG. 9
is a plane view of the bushing in FIG.
3
.
FIG. 10
is a front view of the bushing in FIG.
3
.
FIG. 11
is a cross section taken at line B—B in
FIG. 9
of the bushing in FIG.
3
.
FIG. 12
is a cross section taken at line C—C in
FIG. 9
of the bushing in FIG.
3
.
FIG. 13
is an explanatory drawing showing the elastic deformation of the leaf spring in the electromagnetic induction actuator in FIG.
1
.
FIG. 14
is an explanatory drawing showing another example of the elastic deformation of the leaf spring in the electromagnetic induction actuator in FIG.
1
.
FIG. 15
is a plane view showing, from the diaphragm side, the electromagnetic induction actuator covered with a different bushing that suits the mounting structure of implementation mode
1
of this invention.
FIG. 16
is a front view of the electromagnetic induction actuator of FIG.
15
.
FIG. 17
is a back view of the electromagnetic induction actuator of FIG.
15
.
FIG. 18
is a cross-sectional detail of a different housing, with a projection, that suits the mounting structure of implementation mode
1
of this invention.
FIG. 19
is an explanatory drawing of the structure for mounting the electromagnetic induction actuator in an implementation other than implementation mode
1
of this invention.
FIG. 20
is an explanatory drawing of the structure for mounting the electromagnetic induction actuator that applies to the modes of implementation in
FIGS. 18 and 19
.
FIG. 21
is a cross section of the internal structure of the electromagnetic induction actuator of implementation mode
2
of this invention.
FIG. 22
is a bottom view of the electromagnetic induction actuator of FIG.
21
.
FIG. 23
is a side view of the electromagnetic induction actuator of FIG.
21
.
FIG. 24
is a plane view of the electromagnetic induction actuator of FIG.
21
.
FIG. 25
is an explanatory drawing of the mounting structure within a portable telephone or other equipment, given as an example of mounting the electromagnetic induction actuator of FIG.
21
.
FIG. 26
is a bottom view of the terminal block in the housing of the electromagnetic induction actuator of FIG.
21
.
FIG. 27
is a cross section of the terminal block in the housing of the electromagnetic induction actuator of FIG.
21
.
FIG. 28
is a front view of the terminal block in the housing of the electromagnetic induction actuator of FIG.
21
.
FIG. 29
is a side view of the metal terminal to be mounted in the terminal block in the housing of the electromagnetic induction actuator of FIG.
21
.
FIG. 30
is a plane view of the metal terminal in FIG.
29
.
FIG. 31
is a right side view of the metal terminal in FIG.
29
.
FIG. 32
is a bottom view of the metal terminal in FIG.
29
.
FIG. 33
is an explanatory drawing of the relative positions of the terminal block and the metal terminal in the housing of the electromagnetic induction actuator of FIG.
21
.
FIG. 34
is an explanatory drawing showing the mounting structure of the metal terminal in the terminal block of the electromagnetic induction actuator of FIG.
21
.
FIG. 35
is an explanatory drawing showing the structure of the point of contact of the metal terminal in the terminal block of the electromagnetic induction actuator of FIG.
21
.
FIG. 36
is a cross section showing the internal structure of the electromagnetic induction actuator of an example of the prior art.
OPTIMUM MODE OF IMPLEMENTATION
Implementation Mode
1
Implementation mode
1
is explained below with reference to the drawings.
FIG. 1
shows an electromagnetic induction actuator of the optimum mode assembled inside a portable telephone. This electromagnetic induction actuator
1
is electrically connected to the conduction pattern
20
of the circuit board
2
(the direct connection is to a conduction land) by the leaf spring
17
a
of a metal terminal
17
to be described hereafter, and it covered on the outside by a bushing
3
of elastic material to be described and set in an external housing
4
. Now, the electromagnetic induction actuator
1
in the drawing is located inside the bushing
3
.
The electromagnetic induction actuator
1
is framed in a cylindrical housing
10
with open sides
10
a
,
10
b
as shown in
FIG. 2. A
magnet
11
for generating magnetism, a magnet yoke
12
and a pole piece
13
that sandwiches the magnet
11
, and make up the magnetic circuit, and the outer periphery
12
a
of the yoke
12
is suspended within the housing
10
by leaf springs
14
a
,
14
b.
Moreover, there are a diaphragm
15
that is fitted and fixed in the open side
10
a
of the housing
10
, a voice coil
16
that is mounted to the inside of the diaphragm
15
, and metal terminals
17
used for positive and negative polarity mounted on terminal block
10
d
which projects outward from the side wall
10
c
of the housing
10
. Lead wires (not illustrated) electrically connect the voice coil
16
to the terminal fittings
17
, and a cover
18
with plural sound holes
18
a
,
18
b
. . . is fitted and fixed to the open side
10
b
of the housing
18
.
Within this constitution, the magnet
11
and the pole piece
13
are mounted one over the other within the concavity
12
b
of the yoke
12
, and are thus assembled as something of the internal magnet type. The outer ends of the springs
14
a
,
14
b
are fitted and fixed inside internal steps
10
e
,
10
f
in the side wall
10
c
of the housing
10
. The outer edge of the diaphragm
15
is fitted and fixed in the internal step
10
g
of the open side
10
a
of the housing
10
.
The positive and negative metal terminals
17
are formed by bending a thin metal sheet of good electrical conductivity, such as phosphor bronze or titanium bronze; the knuckle projects down and outward from the housing
10
and the leaf spring
17
a
has a forked tip bent in a V shape. These metal terminals
17
are inserted into the terminal block
10
d
that is formed when the housing
10
is molded of resin, and continue back to contact sheets
17
b
to which the lead wires of the voice coil
16
are connected.
The bushing
3
is molded of an elastic material such as rubber or silicone. This bushing
3
is made up of a side wall
30
that covers the outside of the side wall
10
c
of the casing
10
with the exception of the terminal block
10
and its metal terminals
17
, and ring-shaped extension flanges
31
,
32
that cover the open edges
10
a
,
10
b
of the housing
10
, as shown in
FIGS. 3 through 8
. Because, the extension flanges
31
,
32
are ring-shaped in form, they do not cover the central surface of the cover
18
in which there are sound holes
18
a
,
18
b
. . . or the cental portion of the diaphragm
15
.
As shown in
FIGS. 9 through 12
, the bushing
3
has an opening
33
through which the terminal block
10
d
projects. Moreover, there are circular projections
34
,
35
, which are semicircular in profile, around the outer circumference of the side wall
30
. There is also a circular band
36
on the surface of the extension flange
31
that faces the surface of the circuit board. As will be described hereafter, the extension flange
32
receives pressure from a push rim on the inner side of the outer casing, and so it is possible to have a band
37
, similar to the circular band
36
, on the surface of the extension flange
32
.
As shown in
FIG. 1
, the circuit board
2
so that the electromagnetic induction actuator
1
faces the conduction pattern
20
that is electrically connected to the various necessary circuits. This circuit board
2
also has a number of through holes
21
a
,
21
b
. . . that line up with the sound holes
18
a
,
18
b
. . . in the cover
18
of the electromagnetic induction actuator
1
.
The outer casing
4
comprises an upper case
40
and an under case
41
. There are sound holes
41
a
,
41
b
. . . in the upper case
40
. Inside the upper case
40
there is a stop rim
43
for the electromagnetic induction actuator
1
covered by the bushing
3
. This stop rim
43
has a concavity
44
into which the projection
34
of the bushing
3
is fitted, and so it can take the form of equally spaced stops around the periphery of the bushing
3
.
On the inside of the upper case
40
there is also a push rim
45
that pushes down the extension flange
32
of the bushing
3
. This push rim
45
can be a circular rim that faces the extension flange
32
of the bushing
3
. It is also possible to have, together with the stop rim
43
of the electromagnetic induction actuator
1
, a stopper rim
46
that pushes against the end of the terminal block
10
d
. And on the under case
41
there is a receiver rim
47
that holds the circuit board
2
in place.
To mount the electromagnetic induction actuator
1
in the outer casing
4
using these parts, first electromagnetic induction actuator
1
is covered with the bushing
3
, with the terminal block
10
d
projecting through the opening
33
. Next the electromagnetic induction actuator
1
, covered by the bushing
3
, is placed in the space defined by the stopper rim
46
and the multiple stop rims
43
within the upper case
40
.
Through this placement of the electromagnetic induction actuator
1
, the projection
34
of the bushing
3
is fitted into the concavity
44
of the stop rim
43
, and so it is possible to simply fix the electromagnetic induction actuator
1
inside the upper case
40
. By fixing this electromagnetic induction actuator
1
in place, moreover, the extension flange
32
of the bushing
3
, including the projecting band
37
, is compressed by the circular push rim
45
, and so it surrounds the sound holes
42
a
,
42
b
. . . in the central part of the upper case
40
and, as a seal that is in close contact with the push rim
45
, prevents acoustical leakage within the upper case
40
.
The upper case
40
with the electromagnetic induction actuator
1
assembled within it is then fitted and fixed to the under case
41
in which the circuit board
2
has been mounted. As this is done, the leaf springs
17
a
of the terminal fittings
17
are pressed against the conductive pattern
20
of the circuit board
2
and the extension flange
31
of the bushing
3
, including the projecting band
36
, is compressed by the surface of the circuit board
2
.
Because of this pressure, the extension flange
31
of the bushing
3
, including the projecting band
36
, is compressed to a specified thickness, so that it becomes a pad that establishes a fixed spacing between the electromagnetic induction actuator
1
and the surface of the circuit board
2
. At the same time, the leaf springs
17
a
of the metal terminal
17
are deformed by pressure and placed in close contact with the conduction pattern
20
of the circuit board
2
, providing a sure electrical connection.
Furthermore, because the bushing
3
is an elastic material, the extension flanges
31
,
32
prevent the vibration produced by the electromagnetic induction actuator
1
from being transferred to the circuit board
2
and the upper case
40
. This prevents resonance and provides good acoustical characteristics, and it protects the internal structure from damage from impact. In particular, keeping the area of contact between the projecting band
36
of the bushing
3
and the surface of the circuit board
2
small allows close contact, and assures prevention of resonance.
The metal terminals
17
have leaf springs
17
a
of which the knuckles project downward at a slant from the housing
10
, and the tips are bent in a V shape. Therefore, with the electromagnetic induction actuator
1
fixed in place by the stop rim
43
, the contact points of the leaf springs are deformed into rounded claws, and provide a sure electrical connection without damaging the conductive pattern
20
of the circuit board
2
.
The leaf springs
17
a
of the meal terminals
17
are deformed by bending them into a recess
10
h
that is cut into the terminal block
10
d
, as shown in FIG.
13
. Or as shown in
FIG. 14
, it is possible to deform the leaf springs
17
a
with their tips retreating along the end face of the terminal block
10
d.
In the mode of implementation described above, the side wall
30
of the bushing
3
has circular projections
34
,
35
around the outer periphery. Instead, however, it is possible to cut out sections
38
,
39
to the level of the side wall
30
, as shown in
FIGS. 15 through 17
. By this means the overall width of the electromagnetic induction actuator, measured from the terminal block
10
d
, can be made narrower.
It is also possible to use, instead of the bushing
3
covering the housing
10
, a number of projections
5
of elastic material that are fitted and fixed to the outside of the side wall
10
c
at fixed intervals around the circumference. The projections
5
, as in the mode of implementation described above, fit into concavities
44
in the stop ridge
43
inside the upper housing
40
as shown in
FIG. 19
, by which means the electromagnetic induction actuator
1
can be firmly attached.
In the event that these projections
5
are used, the open side
10
b
of the housing
10
is covered with rubber, silicone or some other elastic material
6
that becomes a pad sandwiched between the circuit board
2
and the open side
10
b
of the housing
10
. A rubber, silicone or other elastic material
7
that covers the other open side
10
a
of the housing
10
can be placed inside the upper case
40
to enclose the sound holes
42
a
,
42
b . . .
Now in the mode of implementation shown in
FIGS. 18 and 19
, the housing
10
has about 3 projections
5
of elastic material fitted and fixed into the outer surface of the side wall
10
c
at fixed intervals. By fitting into concavities
44
in the stop rim
43
, these projections
5
hold the electromagnetic induction actuator
1
in place and thereby prevent the resonance that would accompany vibration, and keep the electromagnetic induction actuator
1
from moving up and down.
Therefore, because the purpose is to make an electrical connection between the leaf spring
17
a
and the conductive pattern
20
of the circuit board
2
, this is suitable as a structure for mounting the electromagnetic induction actuator
1
against the conduction pattern
20
of the circuit board
2
, even without elastic material sandwiched between the circuit board
2
and the open sides
10
a
and
10
b
of the housing
10
, or seal material inside the outer casing
4
.
In the mode of implementation described above, the stop rim
43
for the electromagnetic induction actuator
1
has been explained as a raised feature inside the upper case
40
. It is possible, however, for the stop rim
43
to be attached to the surface of the circuit board
2
.
Implementation Mode
2
Implementation mode
2
is explained below with reference to
FIGS. 21 through 35
. For convenience in explaining, when specifying the orientation of the electromagnetic induction actuator the side facing the cover panel of the equipment will be taken as upward, and the side corresponding to the circuit board as downward.
The basic mode of the electromagnetic induction actuator is enclosed in a cylindrical housing
10
as shown in
FIG. 21
, and has a pole piece
13
and magnet
11
together as one piece separated by a magnetic gap
13
that together with a dish-shaped yoke
12
that hold the magnet
11
and pole piece
13
together make up the magnetic circuit. The magnetic circuit is suspended by spring suspension
14
a
,
14
b
within the housing
10
.
In addition, there is a voice coil
16
mounted on the inward surface side of a diaphragm
15
; the voice coil
16
is inserted into the magnetic gap G between the pole piece
13
and the yoke
12
. The diaphragm
15
is extended within the framework at the open side
10
a
of the housing
10
, and the lead wires
8
a
(
8
b
) of the voice coil
16
are electrically connected to the terminal fittings
9
a
(
9
b
) on the terminal block
24
b
that projects out from the side wall of the housing
10
. A cover
18
with plural sound holes
18
a
,
18
b
. . . covers the open side
10
b
of the housing
10
.
The metal terminals
9
a
(
9
b
) (hereafter, parts of the same terminal will be labelled with a same number) have contact points
19
that make electrical contact with the conduction pattern of the circuit board (not illustrated) and are on the side where the diaphragm
15
is mounted. The flat plates
22
to which the lead wires
8
a
of the voice coil
16
arc electrically connected are on the side where the cover
18
is mounted.
With these metal terminals
9
a
,
9
b
, there are voice coil (not illustrated) leads
8
a
,
8
b
that extend out of the housing
10
on the diaphragm
15
side, as shown in
FIGS. 22
to
24
, up to the side oppose the diaphragm
15
, where the leads
8
a
,
8
b
of the voice coil
16
are separated and connected electrically to the flat plates
22
of positive and negative polarity of metal terminals
9
a
,
9
b
on the side where the cover
18
is attached.
The electromagnetic induction actuator constituted in this way, when mounted in a portable telephone or other equipment as shown in
FIG. 25
, has the side where the cover
18
is attached facing the upper case
40
of the outer casing
4
of the equipment, and the side where the diaphragm (not illustrated) is mounted facing the surface of the circuit board that is mounted between the upper case
40
and the under case
41
, so that the electromagnetic induction actuator is mounted upside down within the outer casing
4
.
This electromagnetic induction actuator is mounted with the side where the cover
18
is attached, which allows little flux leakage, faces the upper case
40
of the outer casing
4
, and the side where the diaphragm
15
is mounted, where there is more flux leakage, facing the surface of the circuit board
2
. Therefore, leakage of the alternating magnetic field to the outside through the upper case
40
of the outer casing
4
is suppressed, and any effect of the alternating magnetic field on magnetic memory cards is prevented.
At the same time, the lead wires
8
a
(
8
b
) of the voice coil
16
are divided by polarity and soldered to the flat plates
22
of the metal terminals
9
a
(
9
b
) on the side where the cover
18
is attached, which faces the upper case
40
of the outer casing
10
. Thus the solder mounds on the metal terminals
9
a
(
9
b
) do not interfere with the electrical circuit connection between the contact points
19
and the conductive pattern
20
of the circuit board
2
.
Within this constitution, the terminal block
24
a
,
24
b
has at its center a slit
23
, as shown in
FIGS. 22 through 24
, and is divided into halves
24
a
and
24
b
for the positive and negative polarities on the side wall of the housing
10
. The voice coil leads
81
,
8
b
are extended up through the slit
23
to the cover
18
attached to the terminal block
24
a
,
24
b
, and are divided by polarity and electrically connected to the flat plates
22
of the metal terminals
9
a
,
9
b.
The layout structure of the lead wires is that the lead wires
8
a
,
8
b
of the voice coil
16
pass through the slit
23
and are laid out stably over a short distance, so that a sure electrical connection can be made to the flat plates of the metal terminals
9
a
,
9
b.
On the side where the lead wires extend past the diaphragm
15
, a rounded chamfer
25
can be made in the peripheral rim of the housing
10
to connect with the slit
23
, as shown in FIG.
26
. This chamfer
25
prevents damage to the insulation of the lead wires
8
a
,
8
b
that extend through the slit
23
to the side where the cover
18
is attached.
The diaphragm
15
, as shown in
FIG. 22
, can be divided into an outer periphery
26
a
that is fixed to the housing
10
, and a central portion
26
a
to which the voice coil is mounted, with the voice coil lead wires
8
a
,
8
b
drawn through the seam where the outer periphery
26
a
and the central portion
26
b
are joined into a single piece.
Because the lead wires are drawn in such a way that the voice coil lead wires
8
a
,
8
b
are laid outside the outer periphery
26
a
, the voice coil lead wires
8
a
,
8
b
do not contact the magnetic circuit within the housing
10
and breakage of the lead wires is prevented.
The terminal block
24
a
(
24
b
), as shown in
FIGS. 27 and 28
(hereafter, parts of the same terminal block will be labelled with same number), has a sink
27
in the center, which is divided vertically into a top plate
28
and a bottom plate
29
side plate
48
,
49
projecting further than the top plate
28
and the bottom plate
29
, and the sink
27
is divided horizontally into the side plate
48
,
49
.
The metal terminals
9
a
(
9
b
) are formed by bending a thin metal sheet of good electrical conductivity, such as phosphor bronze or titanium bronze. These meal terminals
9
a
(
9
b
) are shaped, as shown in
FIGS. 29 through 32
, with a left-opening box-shaped fitted bend
50
in the center; upward from the fitted bend
50
by a given interval is the parallel flat plat
22
to which the lead wire is soldered, and downward from the fitted bend
50
the leaf spring
52
extends at a slant and is then rounded upward with a contact point
19
that contacts the conductive pattern of the circuit board.
These metal terminals
9
a
(
9
b
) are assembled as shown in FIG.
33
: leading with the bridge
53
a
, the fitted bend
50
is pressed into the sink
27
of the terminal block
24
a
(
24
b
), the top plate
28
is clamped between the flat plate
22
to which a lead wire is connected and the top
53
b
of the fitted bend
50
and the fitted bend
50
is fitted into the sink
27
, and the contact point
19
that connects to the conduction pattern of the circuit board projects from the bottom plate
29
of the terminal block
24
a
(
24
b
), thus these metal terminals
9
a
(
9
b
) are supported by side plates
48
,
49
and are assembled.
By means of the structure for fitting this metal terminals
9
a
(
9
b
), as shown in
FIG. 34
, the top
53
b
and bottom
53
c
of the fitted bend
50
are pressed between the top plate
28
and bottom plate
29
of the sink
27
, and the top plate
28
is clamped between the flat plate
22
to which a lead wire is connected and the top
53
b
of the fitted bend
50
so that by pressing the fitted bend
50
into the sink
27
, the metal terminals
9
a
(
9
b
) is fixed firmly into the terminal block
24
a
(
24
b
).
Together with that, the contact point
19
projects down from the bottom plate
29
of the terminal block
24
a
(
24
b
), by means of which the metal terminal
9
a
(
9
b
) is attached within the terminal block
24
a
(
24
b
) by side plates
48
,
49
without extending beyond it, so that the device as a whole can be assembled more compactly.
In addition to this constitution of the metal terminal and terminal block, the metal terminals
9
a
,
9
b
can have a number of teeth
54
,
55
, as shown in
FIGS. 30 and 33
, projecting outward from both sides of the top
53
b
of the fitted bend
50
, as do side-cut spring arms
55
a
,
55
b
. On the other hand, the terminal block
24
a
(
24
b
) has spaces that correspond to the thickness of the spring arms
55
a
,
55
b
, and receiving plates
56
a
,
56
b
that face the top plate
28
on the inner face of side plates
48
,
49
.
In this constitution, the spring arms
55
a
,
55
b
of the metal terminal
9
a
(
9
b
) fits between the top plate
28
and the receiving plates
56
a
,
56
b
of the side plates
48
,
49
of the terminal block
24
a
(
24
b
), and the teeth
54
a
,
54
b
are compressed by the inward faces of the side plates
48
,
49
, so that the metal terminals
9
a
(
9
b
) can be fixed even more firmly into the terminal block
24
a
(
24
b
).
There are on the metal terminal
9
a
(
9
b
) wing-shaped leaf springs
57
that curve outward at the tip of the leaf spring
52
where it is bent back from the contact point
19
and that extend toward the sides of the terminal block
24
a
(
24
b
). The terminal block
24
a
(
24
b
) has receiving piers
56
c
,
56
d
on the inner walls of its side plates that stop and support the wing-shaped leaf springs
57
when the leaf spring
52
is compressed.
With these constituent parts, when the contact point
19
is pressed against the conduction pattern
20
of the circuit board
2
as shown in
FIG. 35
, as the metal terminal
9
a
(
9
b
) is compressed, the wing-shaped leaf springs
57
arc pressed against the receiving plates
56
c
,
56
d
which stop them so that the metal terminal
9
a
(
9
b
) is held in firm contact with the conductive pattern
20
and a sure electrical connection is obtained.
Now, the receiving piers
56
c
,
56
d
for the wing-shaped leaf springs
57
are the other sides of the receiving plates
56
a
,
56
b
for the spring arms
55
a
,
55
b
. There arc, on the inner surface and lower edge of the side plates
48
,
49
, receiving plates
56
e
,
56
f
that determine the extent of projection of the contact point
19
when the metal terminal
9
a
(
9
b
) is fitted into place (see FIGS.
28
and
33
).
Aside from what has been described above, there can be a projecting band
59
that runs along the center of the curve of the contact point
19
in order to make contact with the conductive pattern
20
of the circuit board
2
. This projecting band
59
is a lip that reinforces the contact point
19
; it prevents distortion of the shape of the contact point
19
even under strong pressure against the conduction pattern
20
of the circuit board
2
, and thus provides an even surer electrical contact between the terminal fitting and the conduction pattern
20
.
The electromagnetic induction actuator having metal terminals of this sort is assembled into the equipment with the side on which the diaphragm
15
is mounted facing the circuit board
2
and the other side facing the panel of the outer casing
4
, and so leak of the alternating magnetic field leaving from leaving the outer can be suppressed, thus preventing any effect on magnetic storage cards.
Along with that, an electrical circuit connecting the metal terminal
9
a
(
9
b
) to the conduction pattern
20
of the circuit board
2
is easily assembled within the equipment, and because the metal terminal
9
a
(
9
b
) is firmly in place within the terminal block
24
a
(
24
b
) of the housing
10
, the circuit connection to the conductive pattern
20
of the circuit board
2
is electrically sure, and the equipment as a whole can be assembled compactly.
Now, the terms and expressions in the specification of this invention are used to give an easily understood explanation of this invention; the terms and expressions used in no way limit the technical concepts of the explanation. There has been no intention of excluding anything equivalent to the mode of the invention described above, or to any part thereof, by the use of limiting terms or expressions.
In particular, explanation was made in terms of the electromagnetic induction actuator having the side facing the cover panel of the equipment proper upward, and the side facing the circuit board downward, but that is strictly for the convenience of explanation; the same is true of the top plate and bottom plate of the terminal block. It is possible, therefore, to change the various expressions within the scope of the invention for which rights are claimed.
Potential for Industrial Use
As stated above, the electromagnetic induction actuator of this invention, the mounting structure for an electromagnetic induction actuator and portable information equipment including portable telephones are constituted with leaf spring metal terminal. The metal terminal is deformed by compression and put into close contact with the conduction pattern of the circuit board when the electromagnetic induction actuator is assembled into the portable information equipment, providing a sure electrical connection. Moreover, the electromagnetic induction actuator can be assembled into the equipment easily, and so it is well suited to use in portable telephones and other portable information equipment.
Claims
- 1. A structure within a cylindrical housing for mounting an electromagnetic induction actuator comprising,a magnetic circuit comprising a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece and magnet together with a magnetic gap formed between the yoke and the pole piece, the magnetic circuit supported within the housing by leaf springs; a diaphragm, to the inward side of which is attached a voice coil, the voice coil projecting into the magnetic gap between the pole piece and the yoke, and the diaphragm extending inside the housing through a first open side; a terminal fitting that is attached to a terminal block that projects outward from the side wall of the housing and lead wires that electrically connect the voice coil and the terminal fitting; wherein the terminal block is facing a second open side of the housing in which the diaphragm is fitted and fixed, and a pad of elastic material is sandwiched between the second open side of the housing and the surface of a circuit board on the side of the housing where a leaf spring projects, so that pressing the terminal fitting against a conductive pattern of the circuit board forms an electrical connection to the circuit board; and a bushing of elastic material with circular extension flanges that covers the outside of the side wall of the housing, except for the terminal fittings on the terminal block, and that covers the first open side of the housing, such that the extension flange that covers the first open side of the housing becomes a pad that is sandwiched between the housing and the surface of the circuit board, and the extension flange that covers the second open side of the housing is positioned inside the outer casing as a seal that surrounds sound holes.
- 2. A structure within a cylindrical housing for mounting an electromagnetic induction actuator comprising,a magnetic circuit comprising a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece and magnet together with a magnetic gap formed between the yoke and the pole piece, the magnetic circuit supported within the housing by leaf springs; a diaphragm, to the inward side of which is attached a voice coil, the voice coil projecting into the magnetic gap between the pole piece and the yoke and the diaphragm extending inside the housing through a first open side; a terminal fitting that is attached to a terminal block that projects outward from the side wall of the housing and lead wires that electrically connect the voice coil and the terminal fitting; wherein the terminal block is facing a second open side of the housing in which the diaphragm is fitted and fixed, and a pad of elastic material is sandwiched between the second open side of the housing and the surface of a circuit board on the side of the housing where a leaf spring projects, so that pressing the terminal fitting against a conductive pattern of the circuit board forms an electrical connection to the circuit board; and wherein the housing has multiple projections of elastic material at intervals along the outer periphery of the side wall and the circuit board or an outer casing has a stop rim having concavities into which the projections of the housing fit, such that fitting the projections of the housing into the concavities attaches the electromagnetic induction actuator to the stop rim of the outer casing or the circuit board.
- 3. An electromagnetic induction actuator that has, within a cylindrical housing, a magnetic circuit comprising a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece together with a magnetic gap formed between the yoke and the pole piece, the magnetic circuit being supported within the housing by leaf springs;a diaphragm, to the inward side of which is attached a voice coil, the voice coil projecting into the magnetic gap between the pole piece and the yoke, and the diaphragm extending inside the housing through an open side; a terminal fitting that is attached to a terminal block that projects outward from the side wall of the housing; and lead wires that electrically connect the voice coil and the terminal fitting; in which contact points that connect electrically to a conductive pattern of a circuit board are on the side where the diaphragm is mounted, and flat plates that are electrically connected to the voice coil lead wires are attached to leaf spring terminal fittings on the side opposite the side where the diaphragm is mounted, the voice coil lead wires being divided by positive and negative polarity and electrically connecting the side where the diaphragm is mounted to the flat plates of the terminal fittings on the opposite side, with the side where the diaphragm is mounted facing the surface of the circuit board, or mounted upside-down in an equipment case; wherein the terminal block comprises a sink in the center of both a positive half and a negative half of the terminal block, the sink having a top plate and a bottom plate, of which the top plate extends further out than the bottom plate, and wherein the sink further comprises two side plates; and in which there are the terminal fittings of the leaf spring material, each terminal fitting having a fitted bend in the center and a bend at the top section that is parallel to the fitted bend that forms a flat plate for attachment of the lead wire, and at the bottom the leaf spring that slants down and curves around to form the contact point for connection with the conductive pattern of the circuit board; such that when the fitted bend is inserted into the sink and the top plate of the terminal block is clamped between the top of the fitted bend and the flat plate for attachment of the lead wire, the contact point for connection to the conductive pattern of the circuit board projects downward and is supported by the two side plates, with the terminal fitting firmly attached to the terminal block; and wherein the terminal fittings comprise projecting teeth that project from an outer rim and spring arms that extend from a clamping spring portion, as well as receiving piers on the inner surfaces of the side plates of the terminal block at a distance from the top plate that corresponds, to the thickness of the spring arms; such that by fitting the spring arms between the top plate and the receiving piers on each side plate and compressing the projecting teeth against the inner surfaces of the two side plates, the terminal fitting is mounted in the terminal block.
- 4. An electromagnetic induction actuator that has, within a cylindrical housing, a magnetic circuit comprising a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece together with a magnetic gap formed between the yoke and the pole piece, the magnetic circuit being supported within the housing by leaf springs;a diaphragm, to the inward side of which is attached a voice coil, the voice coil projecting into the magnetic gap between the pole piece and the yoke, and the diaphragm extending inside the housing through an open side; a terminal fitting that is attached to a terminal block that projects outward from the side wall of the housing; and lead wires that electrically connect the voice coil and the terminal fitting; in which contact points that connect electrically to a conductive pattern of a circuit board are on the side where the diaphragm is mounted, and flat plates that are electrically connected to the voice coil lead wires are attached to leaf spring terminal fittings on the side opposite the side where the diaphragm is mounted, the voice coil lead wires being divided by positive and negative polarity and electrically connecting the side where the diaphragm is mounted to the flat plates of the terminal fittings on the opposite side, with the side where the diaphragm is mounted facing the surface of the circuit board, or mounted upside-down in an equipment case; wherein the terminal block comprises a sink in the center of both a positive half and a negative half of the terminal block, the sink having a top plate and a bottom plate, of which the top plate extends further out than the bottom plate, and wherein the sink further comprises two side plates; and in which there are the terminal fittings of the leaf spring material, each terminal fitting having a fitted bend in the center and a bend at the top section that is parallel to the fitted bend that forms a flat plate for attachment of the lead wire, and at the bottom the leaf spring that slants down and curves around to form the contact point for connection with the conductive pattern of the circuit board; such that when the fitted bend is inserted into the sink and the top plate of the terminal block is clamped between the ton of the fitted bend and the flat plate for attachment of the lead wire, the contact point for connection to the conductive pattern of the circuit board projects downward and is supported by the two side plates, with the terminal fitting firmly attached to the terminal block; and wherein the terminal fittings comprise protecting teeth that project from an outer rim and spring arms that extend from a clamping spring portion, as well as receiving piers on the inner surfaces of the side plates of the terminal block at a distance from the top plate that corresponds to the thickness of the spring arm; such that by fitting the spring arms between the top plate and the receiving piers on each side plate and compressing the projecting teeth against the inner surfaces of the two side plates, the terminal fitting is mounted in the terminal block; wherein the terminal fitting further comprises the tip of the leaf spring that curves upward beyond the contact point and folds back inward and has the leaf springs that extend toward the two sides of the terminal block, and in which there are receiving piers on the inner surfaces of the two side plates that stop and support the leaf springs extending from the tip when the terminal fitting is deformed under pressure, such that the terminal fitting is mounted in the terminal block by a fitted structure that allows spring movement of the contact point.
- 5. A structure for mounting an electromagnetic induction actuator as described in claim 1 above, in which there is a circular projecting band of elastic material that faces the surface of the circuit board, the circular band being sandwiched between one open side of the housing and the surface of the circuit board as a pad that is deformed by compression.
- 6. A structure for mounting an electromagnetic induction actuator as described in claim 2 above, in which there is a circular projecting band of elastic material that faces the surface of the circuit board, the circular band being sandwiched between one open side of the housing and the surface of the circuit board as a pad that is deformed by compression.
- 7. A structure for mounting an electromagnetic induction actuator as described in claim 1 above, in which the electromagnetic induction actuator is suited to mounting within a portable telephone.
- 8. A structure for mounting an electromagnetic induction actuator as described in claim 2 above, in which the electromagnetic induction actuator is suited to mounting within a portable telephone.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2000-239926 |
Aug 2000 |
JP |
|
2001-63137 |
Mar 2001 |
JP |
|
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/JP01/06710 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO02/11904 |
2/14/2002 |
WO |
A |
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Number |
Name |
Date |
Kind |
6038327 |
Bleim et al. |
Mar 2000 |
A |
6590991 |
Maeda |
Jul 2003 |
B1 |
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Country |
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Oct 2000 |
EP |
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Oct 2000 |
EP |
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May 1998 |
JP |
2001-025204 |
Jan 2001 |
JP |
2001-225010 |
Aug 2001 |
JP |
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