JP3205891B2 - Electroacoustic conversion unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electroacoustic conversion unit used for an electroacoustic conversion type communication device such as a mobile telephone (mobile telephone or car telephone).

[0002]

2. Description of the Related Art An electroacoustic conversion unit employed on a receiving side or a transmitting side of a telephone handset is used to form various electric circuits or to electrically connect electronic parts such as ICs and a wiring board on the equipment side on which electric parts are mounted. Must be connected to
It must be fixed to the handset, and furthermore, it is necessary to take measures to prevent the electronic components and the like from being damaged by static electricity that enters from outside.
In addition, in the conventional electroacoustic conversion unit, generally, a wiring board is provided on one side of a frame, and a voice mounted on a diaphragm held on the other side of the frame is provided on a conductor foil of the wiring board. A conductor derived from the coil is connected.

FIG. 14 shows a conventional example of a conventional means for electrically connecting an electroacoustic conversion unit A and a device-side wiring board B, and FIG. 15 shows a conventional example of a means for fixing the unit A to a handset. FIG. 16 shows a conventional example of a means for preventing electrostatic breakdown of an electronic component or the like.

[0004] As can be seen in FIG.
Means for electrically connecting the device-side wiring board B to
One end of the lead wire 110 is soldered to the conductor foil 102 of the wiring board 101 provided on the unit A side, and the other end is connected to the surface electrode 10 of the device side wiring board B.
3,103 was soldered. In addition,
In the unit A used for the telephone handset, two lead wires 110 are required.

[0005] As can be seen from Fig. 15, conventionally, as means for fixing the unit A to the handset, a presser fitting 120 laid between bosses 104, 104 provided on the handset side is screwed with screws 105, 105. By tightening, the unit A is pressed and fixed to the handset by the press fitting 120.

Further, as can be seen from FIG. 16, as means for preventing electrostatic breakdown of electronic components and the like, a copper foil tape 130 is attached from the other side to the one side of the unit A. Is brought into contact with the earth land of the device-side wiring board B.

[0007]

However, FIG.
In the conventional means described in the above, at least two lead wires 11
0, 110 and lead wires 110, 11
In addition to the troublesome work of soldering 0, there is a problem that the lead wires 110 and 110 are additionally required and the economic efficiency is reduced.

The conventional means described with reference to FIG. 15 not only requires a special holding member 120 but also the holding member 1
In addition to the troublesome work of tightening the 20 with the screws 105, 105, there is a problem that the presser fitting 120 and the screws 105, 105 are additionally required, and the economic efficiency is reduced.

The conventional means described with reference to FIG. 16 requires a skillful operation of carefully adhering the copper foil tape 130, and also requires an extra copper foil tape 130, which is economical. There was a problem of lowering.

The present invention has been made in view of the above problems.

An object of the present invention is to electrically connect an electroacoustic conversion unit to a surface electrode of a device-side wiring board.
Provided is an electroacoustic conversion unit capable of performing connection by a so-called contact type that does not rely on soldering using a contact piece member, thereby eliminating the need for soldering lead wires and lead wires. It is.

Another object of the present invention is to provide an electroacoustic conversion unit which can be fixed to an electroacoustic conversion device such as a telephone handset using a baffle having a function of releasing static electricity to an earth land of a wiring board on the device side. It is to provide.

Still another object of the present invention is to provide not only an electric connection function and a fixing function between the electroacoustic conversion unit and the device-side wiring board, but also a function of preventing electrostatic breakdown of electronic components and the like. An object of the present invention is to provide a surface-mounted electroacoustic conversion unit.

[0014]

According to the present invention, the electroacoustic conversion unit can be electrically connected to a surface electrode of a device-side wiring board by a so-called contact type. Things. That is,

In the electroacoustic conversion unit according to the first aspect of the present invention, a wiring board is provided on one side of a frame, and the conductive foil of the wiring board is mounted on a diaphragm held on the other side of the frame. A unit body to which a conductor led out from the voice coil is connected; a cap body that can be mounted on the unit body and has an opening facing the conductor foil of the wiring board in the mounted state; A first terminal portion which can be fixed to the cap body, and one end extending from a predetermined portion of the intermediate portion fixed to the cap body is inserted and provided in an opening of the cap and corresponds to a conductor foil of the wiring board; The other end extending from the predetermined portion of the intermediate portion has a second elasticity corresponding to the surface electrode of the device-side wiring board provided on the electroacoustic transducer device side.
And a contact member serving as a terminal portion.

According to a second aspect of the present invention, there is provided an electroacoustic conversion unit comprising the above-mentioned unit main body, and a cap body with terminals formed by fixing a contact piece to the cap body.

According to a third aspect of the present invention, there is provided the electroacoustic conversion unit according to the second aspect, wherein the cap body covers an edge frame portion fitted to the unit main body and one side of the frame in the unit main body. And an opening of the cap body is opened by removing a part of the top plate part and a part of the edge frame part.

Claims 4, 5, and 6 relate to a surface mount type electro-acoustic conversion unit. That is,

According to a fourth aspect of the present invention, there is provided an electroacoustic conversion unit, comprising: a surface mounting terminal fixed to one side of a frame and soldered to a surface electrode of a device-side wiring board provided on the electroacoustic conversion device side; A unit body to which a conductor derived from a voice coil mounted on a diaphragm held on the other side of the frame is connected, and a metal cap body mounted on the unit body and covering the other side of the unit body And a baffle integrally provided with surface mounting terminals to be soldered to another surface electrode of the device-side wiring board.

According to a fifth aspect of the present invention, in the electroacoustic conversion unit according to the fourth aspect, the surface mounting terminal on the unit body side is an anode terminal, and the surface mounting terminal on the baffle side is a cathode terminal. It is that.

According to a sixth aspect of the present invention, in the electroacoustic conversion unit according to the fourth or fifth aspect, the metal cap body of the baffle has an edge frame portion that can be fitted to the unit main body and the unit main body. A front plate portion that covers the other surface and has a sound hole is integrally provided, and a claw that is bent and engaged with an outer peripheral portion of one surface of the unit body is protruded from the edge frame portion. That is.

Furthermore, an electroacoustic conversion unit according to a seventh aspect of the present invention is the electroacoustic conversion unit according to the above-mentioned claims, wherein the electroacoustic conversion device is a telephone handset.

[0023]

In the electroacoustic conversion unit according to the first aspect of the present invention, the unit body itself has an electroacoustic conversion function. Therefore, this unit main body can be handled as one product.

On the other hand, a predetermined portion of the intermediate portion of the contact piece member is fixed to the cap body, and the first terminal portion is inserted and arranged in the opening of the cap body to form a cap body with terminals. Then, when the terminal-attached cap body is mounted on the unit main body, the first terminal portion comes into contact with the conductor foil of the unit main body side wiring board. In addition, by incorporating the cap with terminal attached to the unit body into the electroacoustic transducer, the second terminal portion elastically contacts the surface electrode of the device-side wiring board.

After the cap is attached to the unit body, it is also possible to fix a predetermined portion of the intermediate portion of the contact member to the cap, and even in such a case, the first terminal portion of the contact member can be used. Can be inserted into the opening of the cap body and brought into contact with the conductor foil of the unit body side wiring board.

An electroacoustic conversion unit according to a second aspect of the present invention includes the above-mentioned unit main body and the above-mentioned terminal-attached cap having a contact member fixed to the cap. Therefore, by incorporating the electroacoustic conversion unit into the electroacoustic conversion device together with the device-side wiring board, the second terminal portion of the electroacoustic conversion unit elastically contacts the surface electrode of the device-side wiring board.

In the electroacoustic conversion unit according to the third aspect of the present invention, the opening of the cap body is opened by removing a part of the top plate part and a part of the edge frame part. When the first terminal portion of the contact piece member inserted and arranged in the opening is soldered to the conductor foil of the wiring board in contact with the first terminal portion, the edge frame portion of the cap body does not become so obstructive. Thus, the soldering operation can be performed easily and reliably. In addition, the contact piece member has a predetermined portion in the middle portion in the longitudinal direction fixed to the cap body, and one end portion thereof serves as a first terminal portion connected to the conductor foil of the wiring board,
The other end where the other end is in elastic contact with the surface electrode of the device side wiring board
Since the second terminal portion is formed as a terminal portion, the second terminal portion is not affected by the first terminal portion when the second terminal portion is pressed by the surface electrode of the device-side wiring board and is bent and deformed.

According to a fourth aspect of the present invention, in the electro-acoustic conversion unit, the surface mounting terminals of the unit main body and the surface mounting terminals of the baffle mounted on the unit main body are connected to different surfaces of the device-side wiring board. By being soldered to the electrode, it is attached to the device-side wiring board, and the electroacoustic conversion unit is electrically connected to the device-side wiring board. The baffle can play a role of discharging static electricity to the ground.

In the electroacoustic conversion unit according to the fifth aspect of the present invention, since the surface mounting terminal of the baffle including the metal cap is a cathode terminal, the surface mounting terminal is connected to the ground circuit of the device-side wiring board. , The static electricity that has entered the electroacoustic transducer flows to the ground via this baffle. This prevents electrostatic breakdown of electronic components such as ICs mounted on the device-side wiring board.

According to the electroacoustic conversion unit of the invention according to claim 6, the baffle and the unit main body can be integrated without using extra parts such as screws.

As the electro-acoustic transducer according to any one of claims 1, 2, 3, 4, 5, and 6, a handset of a telephone is used as in claim 7. You can choose.

[0032]

1 to 4 show an embodiment relating to a so-called contact type electro-acoustic conversion unit (hereinafter referred to as a unit) incorporated in a telephone handset. FIG. 1 shows an electro-acoustic unit main body (hereinafter referred to as a unit main body). 1, an exploded perspective view showing a cap body 2 with a terminal, FIG. 2 is an exploded perspective view showing each component of a unit body 1 and a cap body 2 with a terminal, and FIG. FIG. 4 is an exploded perspective view showing the case 3 and each main part of the device-side wiring board 4 on the handset side and the unit 10, and FIG. 4 is an explanatory view showing an electrical connection state between the unit 10 and the device-side wiring board 4. .

The cap body 2 with a terminal shown in FIG. 1 corresponds to the cap body 5 shown in FIG. 2 to which a contact piece member 12 is fixed.
The cap body 5 is a synthetic resin molded body integrally provided with a ring-shaped edge frame 6 and a top plate 7, and lacks a part of the top plate 7 and a part of the edge frame 6. Thus, two openings 8 are formed at both locations. In the top plate portion 8, recesses 9, 9 are provided at the edges of the openings 8, 8, and projections 11, 9 are formed in these recesses 9, 9, respectively.
11 are provided. The contact piece member 12 is made of, for example, a phosphor bronze metal strip that has been subjected to a surface treatment such as nickel plating or gold plating, and has a spring property. The contact piece member 12 is formed by fitting a round hole 13 formed at an intermediate portion in the longitudinal direction near one end thereof into the projection 11 of the cap body 5 and crushing the projection 11 by heat. It is fixed in place 9 in a fitting manner. And
One end side of the round hole 13 in the contact piece member 12 is bent in a stepped manner to form a planar first terminal portion 14.
The terminal portion 14 is provided in an inserted state in the opening 8 of the cap body 5. The other end side of the round hole 13 in the contact piece member 12 is bent in an inclined state, and a tip end of the inclined portion is formed as a curved second terminal portion 15. The second terminal portion 15 is a cap. It is raised from the top plate 7 of the body 5. Reference numeral 16 denotes a round hole formed in the top plate 7 of the cap body 5.

The unit main body 1 shown in FIG. 1 has a diaphragm 17 shown in FIG. 2, a voice coil 18 mounted on the diaphragm 17, a pole piece 19, a magnet 21, and a metal yoke (in this embodiment, a frame is also used) 22. , A compensating cloth 23 and a wiring board (terminal plate) 24 in this order.
The wiring board 24 is provided on one side of the (frame), and the diaphragm 17 is provided on the other side of the frame. Conductive foils 25, 25 used as solder lands are provided at two places on the wiring board 24. The conductors 26, 26 led from the voice coil 18 are connected to the conductor foils 25, 25 by soldering.

The above-described unit body 1 itself has an electroacoustic conversion function, and is therefore one product useful as a speaker or a microphone. That is, the unit body 1 is the unit A described with reference to FIGS.
And is replaceable with the unit A. Therefore, the unit main body 1 can be used for product inspection, and it is more preferable to do so than to provide the unit main body 1 with the terminal-attached cap body 2 to product inspection.

The terminal-attached cap body 2 is mounted on the unit body 1 by fitting the edge frame 6 of the cap body 5 to the unit body 1 from one side thereof. 22 is covered on one side, and the openings 8, 8 of the cap body 5 are connected to the wiring board 2 on the unit body 1 side.
4 are exposed to the conductor foils 25, 25. In addition, the contact piece member 1
The first and second terminal portions 14 and 14 overlap the conductor foils 25 and 25 of the wiring board 24, and the overlapping portions are soldered.
And the unit body 1 are connected. In addition, the cap body 5
The protruding portion of the yoke 22 is inserted into the circular hole 16 of the first embodiment. 3 and 4, reference numeral 27 denotes solder piled up at the soldering location.

As can be inferred from FIG. 3, the unit 10 is incorporated in the case 3 of the handset, and the device-side wiring board 4 is assembled in the case 3 from above.
The device-side wiring board 4 is adapted to be fixed at an appropriate position only by being fitted into the case 3, and furthermore, by such fixing, the device-side wiring board 4 provided on the device-side wiring board 4 as shown in FIG. The two surface electrodes 28, 28
The second terminal portions 15, 15 are overlapped and contact with each other, and the second terminal portions 15, 15 are bent and deformed like a virtual line.
Thus, the unit 10 is fixed to the case 3 and the unit 10 is electrically connected to the surface electrodes of the device-side wiring board 4.

By the way, the contacting members 12, 12 provided in the unit 10 have their second terminals 15, 15 subjected to the pressing force of the surface electrodes 28, 28 of the device side wiring board 4, and have the elasticity of the inclined portion. Deflected against. However, since the contact piece members 12, 12 are fixed to the cap body 5 at a predetermined position in the middle part in the longitudinal direction, the second terminal parts 15, 1 are fixed.
5 is distorted and displaced by the first terminal portions 14, 14.
However, even if the second terminals 15, 15 are displaced, the first terminals 14, 14 are less likely to be displaced under the influence of the displacement. As a result, the conductor foil 25 of the wiring board 24,
25 and the solder 27 joining the first terminals 14,
27 is peeled off, or the conductor foils 25, 25
There is no risk of peeling.

5 to 7 show another embodiment relating to a so-called contact type unit 10 incorporated in a telephone handset. FIG. 5 is an exploded perspective view showing a unit main body 1 and a cap body 2 with terminals. FIG. 6 is an exploded perspective view showing each component of the unit main body 1 and the cap body 2 with terminals, and FIG. 7 is an explanatory view showing a cross-sectional view of an electrical connection state between the unit 10 and the device-side wiring board 4.

In this embodiment, the arrangement of the contact pieces 12, 12 in the terminal-attached cap body 2 and the structure of the parts related thereto are different from those of the embodiments described with reference to FIGS. That is, in this embodiment, the two contact pieces 12, 12 are fixed to the cap body 5 in parallel.
In this embodiment, a resin baffle 29 for preventing static electricity covers the diaphragm 17 of the unit body 1. The resin baffle 29 has a required number of sound holes 31. Other configurations are basically the same as those of the embodiment described with reference to FIGS. Therefore, in order to avoid repetition of description, the same reference numerals in FIGS. 5 to 7 denote the same parts as in FIGS. 1 to 4, and a description thereof will be omitted. The operation is the same as that of FIG. 1 except that the resin baffle 29 is useful for preventing obstacles due to the intrusion of static electricity, for example, preventing electronic components and electric components such as ICs mounted on the device-side wiring board 4 from being electrostatically damaged. This is the same as that described with reference to FIGS.

FIGS. 8 to 13 show an embodiment relating to a surface mount type electro-acoustic conversion unit (hereinafter referred to as a unit) 40 incorporated in a telephone handset.
FIG. 9 is an exploded perspective view showing a unit body 41 and a baffle 42, FIG. 9 is a perspective view of the unit 40 viewed from one side, and FIG.
0 is a perspective view of the unit 40 viewed from the other side, and FIG. 11 is a case 3 of the handset (an example of the electroacoustic transducer).
FIG. 12 is an exploded perspective view showing the essential parts of the device-side wiring board 43 on the handset side and the unit 40. FIG. FIG. 13 is an explanatory view showing a cross section of another state in which the unit 40 is surface-mounted on the device-side wiring board 4.

As shown in FIGS. 12 and 13, the unit main body 41 includes a diaphragm 44, a voice coil 45 mounted on the diaphragm 44, a pole piece 46, a magnet 47, a metal yoke 48, a resin frame 49, and a compensating cloth. (Non-woven fabric) 51 are sequentially incorporated, and a surface mounting terminal 52 is fixed to one side of the frame 49. The surface mounting terminal 52 is fitted into a recess 53 formed in the frame 49 as shown in FIG. 8, and a projection 54 provided on the frame 49 is inserted into a round hole (not (Shown) and fixed to the frame 49 by crushing.
As shown in FIG. 8, a conductor 55 led out from the voice coil 45 is drawn out on one side of the frame 49, and the conductors 55, 55 are connected to the above-mentioned surface as shown in FIGS. 5, 12, and 13. It is soldered to the mounting terminal 52. In FIGS. 5, 12, and 13, reference numeral 56 denotes solder. Further, the frame 49 has a required number (two in the illustrated example) of positioning projections 57, 57 penetrating through the compensating cloth 51, and has a recess 5 at a predetermined position on the outer peripheral portion of the frame 49.
8, 58, and a large recess 59 is formed in other places, and a projection 61 is protruded from the recess 59.

Since the unit main body 41 shown in FIG. 8 has an electroacoustic conversion function itself, it is also one product useful as a speaker or a microphone. That is, the unit main body 41 is equivalent to the unit A described in FIGS. 14 to 16 and can be replaced with the unit A. Therefore, the unit main body 1 can be used for product inspection, and it is preferable to do so.

The baffle 42 shown in FIG. 8 is a cap that integrally includes an edge frame 63 that can be fitted into the unit main body 41 and a front plate 64 that covers the other surface of the unit main body 41 and has a sound hole 65. The body 62 is provided integrally with claw pieces 66, 66, 67 protruding from the edge frame 63 and a surface mounting terminal 68.

In the baffle 42, after the edge frame 63 is fitted to the unit body 41, the claw pieces 66, 66 are folded into the recesses 58, 58 on the unit body 41 side, and the other claw pieces 67 are attached. It is folded into the large recess 59 of the unit body 41 and the round hole 69 of the claw 67 is inserted into the unit body 41.
The protrusion 61 is fitted to the side main body 41 and is thermally crushed, so that the protrusion 61 is connected to and integrated with the unit main body 41 (FIG. 9).
And FIG. 10).

In this embodiment, the surface mounting terminal 52 on the unit body 41 side is an anode terminal and the baffle 42
The surface mounting terminal 68 on the side is a cathode terminal. Then, as shown in FIGS. 11, 12, and 13, the terminals 52, 68 are connected to the surface electrodes 71, 72 of the device-side wiring board 43.
Are connected to each other by soldering. FIG.
In FIG. 2 and FIG. 13, reference numerals 73 and 74 are solders. The unit 40 surface-mounted on the device-side wiring board 43 is incorporated into the handset case 30 together with the device-side wiring board 43. By doing so, the sound hole 75 of the case 30
Static electricity that has entered through the baffle 42 is released to the cathode side electrode 72 (earth land) of the device-side wiring board 43 via the baffle 42. Therefore, the electronic components and electric components mounted on the device-side wiring board 43 do not cause electrostatic breakdown.

In this embodiment, since the positioning projection 57 is provided on the frame 49, the positioning projection 57 is inserted into the positioning hole 81 of the device-side wiring board 43 so that the surface mounting terminals 52 and 68 and the surface electrode 71 are provided. , 72 are reliably performed. The device-side wiring board 4
3 is fixed at an appropriate position only by being fitted into the case 30. Thereby, the unit 40 is fixed to the case 30.

[0048]

The electroacoustic conversion unit according to the first aspect of the invention has the advantage that the unit main body itself has an electroacoustic conversion function, so that product inspection can be performed on the unit main body. In addition, by mounting the cap body on the unit body and fixing the contact member to the cap body in any order, not only a so-called contact-type electroacoustic conversion unit can be obtained immediately, but also The contact type can be configured to connect the electro-acoustic conversion unit to the device side wiring board using lead wires, or to fix the electro-acoustic conversion unit to the device side using special metal fittings, as in the past. Since there is no need to perform such operations, the workability at the time of manufacturing the device is improved and the cost is reduced at the same time.

The same effect is exerted by the invention according to claim 2, but particularly according to the invention according to claim 2, the cap body with the terminal is mounted on the unit main body, and the cap body with the terminal-side wiring board is electrically connected with the device-side wiring board. Just install it in the sound conversion device,
Since the electroacoustic conversion unit is electrically connected to the device-side wiring board, workability is improved.

According to the electroacoustic conversion unit of the third aspect of the present invention, there is an effect that the first terminal portion can be easily and reliably soldered to the conductor foil of the wiring board. Further, since the second terminal portion is not affected by the first terminal portion when the second terminal portion is pressed by the surface electrode of the device-side wiring board and deforms, the solder bonding the first terminal portion to the conductor foil of the wiring board is not provided. Is not peeled off or peeled off from the conductive foil from the wiring board.

According to the electroacoustic conversion unit of the fourth aspect of the present invention, the surface mounting terminals of the unit body and the surface mounting terminals of the baffle are soldered to different surface electrodes of the device-side wiring board. Since the electrical connection and the fixing of the electro-acoustic conversion unit are performed simultaneously, the conventional lead wires and metal fittings for fixing are not required, so that the workability in manufacturing the device is improved and the cost is reduced at the same time.

According to the electroacoustic conversion unit of the fifth aspect of the present invention, the countermeasures against static electricity are taken by the baffle. This has the effect of preventing electrostatic breakdown of electronic components such as ICs mounted on the IC.

According to the electroacoustic conversion unit of the present invention, the baffle and the unit main body can be integrated without using extra parts such as screws, so that the number of parts can be reduced.

According to the electro-acoustic conversion unit of the invention according to claim 7, the effects of the above-mentioned claims are exhibited in a telephone handset.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a unit main body and a cap with terminals used in a unit according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing components of a unit body and a cap body with terminals.

FIG. 3 is an exploded perspective view showing a main part of a case of a telephone handset, a device-side wiring board, and the unit.

FIG. 4 is an explanatory diagram showing an electrical connection state between the unit and a device-side wiring board.

FIG. 5 is an exploded perspective view showing a unit body and a cap with terminals used in a unit according to another embodiment of the present invention.

FIG. 6 is an exploded perspective view showing respective components of a unit body and a cap body with terminals.

FIG. 7 is an explanatory diagram showing a cross-sectional state of the electrical connection between the unit and the device-side wiring board.

FIG. 8 is an exploded perspective view showing a unit main body and a baffle used in a unit according to still another embodiment of the present invention.

FIG. 9 is a perspective view of the unit viewed from one side.

FIG. 10 is a perspective view of the unit as viewed from the other side.

FIG. 11 is an exploded perspective view showing main parts and units of the case and the device-side wiring board of the handset.

FIG. 12 is an explanatory view showing a state in which a unit is surface-mounted on a device-side wiring board in a cross section.

FIG. 13 is an explanatory view showing a cross section of another state in which the unit is surface-mounted on the device-side wiring board.

FIG. 14 is an explanatory view showing a conventional means for electrically connecting a unit to a device-side wiring board.

FIG. 15 is an explanatory view showing a conventional unit fixing means.

FIG. 16 is an explanatory view showing a conventional unit for preventing electrostatic breakdown of a unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit main body 2 Cap body with terminal 4 Device side wiring board 5 Cap body 6 Edge frame part 7 Top plate part 8 Opening 12 Second terminal part 14 First terminal part 17 Diaphragm 18 Voice coil 22 Yoke (frame) 24 Wiring board 25 Conductor foil 26 Conductor 28 Surface electrode 41 Unit main body 42 Baffle 43 Device-side wiring board 44 Diaphragm 45 Voice coil 49 Resin frame (frame) 52 Surface mounting terminal 55 Conductor 62 Cap body (metal cap body) 63 Edge frame part 64 Table Plate 65 Sound hole 66 Claw piece 68 Terminal for surface mounting 71, 72 Surface electrode

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI H04R 9/04 103 H04R 9/04 103 (56) References Japanese Utility Model 6-19399 (JP, U) Japanese Utility Model 2-57695 (JP, U) JP-A 61-1987 (JP, U) JP-A 3-121796 (JP, U) JP-A 61-179893 (JP, U) JP-A 51-49945 (JP, Y1) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) H04R 9/10 H04M 1/03 H04R 1/06 H04R 9/02 H04R 9/02 101 H04R 9/04 103

Claims (7)

(57) [Claims] A wiring board is provided on one side of a frame, and a conductor derived from a voice coil mounted on a diaphragm held on the other side of the frame is connected to a conductor foil of the wiring board. A unit main body, a cap body that can be mounted on the unit main body and has an opening facing the conductive foil of the wiring board in the mounted state, and a predetermined portion in a longitudinal middle portion can be fixed to the cap body,
One end extending from a predetermined portion of the intermediate portion fixed to the cap body is inserted and provided in an opening of the cap to serve as a first terminal portion corresponding to the conductor foil of the wiring board, and the predetermined portion of the intermediate portion is provided. And a contact piece member serving as a second terminal portion having elasticity corresponding to a surface electrode of the device-side wiring board provided on the electroacoustic transducer device side. Electroacoustic conversion unit. 2. A wiring board is provided on one side of a frame, and a conductor derived from a voice coil mounted on a diaphragm held on the other side of the frame is connected to a conductor foil of the wiring board. An electroacoustic conversion unit comprising: a unit main body; and a terminal-attached cap fixed to the cap according to claim 1 at a predetermined location in a longitudinally intermediate portion of the contact piece member according to claim 1. 3. The cap body integrally includes an edge frame portion fitted into the unit main body and a top plate portion covering one side of the frame in the unit main body, and an opening of the cap body is provided on the top plate. The electroacoustic conversion unit according to claim 2, wherein the electroacoustic conversion unit is opened by removing a part of the part and a part of the edge frame part. 4. A surface mounting terminal fixed to one side of the frame and soldered to a surface electrode of a device-side wiring board provided on the electroacoustic transducer device side, held on the other surface side of the frame. Another surface electrode of the device-side wiring board is mounted on a unit main body to which a conductor derived from a voice coil mounted on the diaphragm is connected, and a metal cap body mounted on the unit main body and covering the other surface of the unit main body. A baffle integrally provided with a surface mounting terminal to be soldered to the electroacoustic conversion unit. 5. The electroacoustic conversion unit according to claim 4, wherein the surface mounting terminal on the unit body side serves as an anode terminal, and the surface mounting terminal on the baffle side serves as a cathode terminal. 6. A metal cap body of a baffle integrally includes an edge frame portion fittable into the unit body and a front plate portion covering the other surface side of the unit body and having a sound hole. The electroacoustic conversion unit according to claim 4 or 5, wherein a claw that is bent and engaged with an outer peripheral portion on one surface of the unit body is protruded from the edge frame portion. 7. The electroacoustic transducer is a telephone handset.
The electroacoustic conversion unit according to claim 5.