JPH08317029A - Electroacoustic transducer unit - Google Patents

Abstract

PURPOSE: To connect a terminal of an electroacoustic transducer unit and a terminal of a telephone handset of its housing electrically without soldering by making elastically a chevron bent part of a contact piece connected to a case in contact with a terminal of an opposite terminal board of the housing. CONSTITUTION: A contact member 5 whose mount seat 51 is fixed to a case of an electroacoustic transducer driver 1 acts like a lead wire. That is, a chevron bent part 53 formed to be a contact of the contact member to be soldered to a solder terminal of the case of the electroacoustic transducing driver 1 is made elastically in contact with a terminal of an opposite terminal board provided in the housing to connect electrically the soldering terminal and the terminal of the opposite terminal board. Since a tip 54 of the contact member 5 is supported in slidable contact with an outer face of the case, a contact pressure between the chevron shaped bent 53 and the terminal of the opposite terminal board is increased to enhance the contact reliability.

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 in an electroacoustic conversion type communication device such as a mobile phone (eg, a mobile phone).

[0002]

2. Description of the Related Art The following is known as a conventional electroacoustic conversion unit employed on the receiving side of a telephone handset. That is, a case made of a resin frame contains a diaphragm equipped with a voice coil and other parts such as a magnet and a yoke necessary for electroacoustic conversion, and the case is made of a conductor foil of a wiring board for soldering. It is known that the terminals are provided.

When such an electroacoustic conversion unit is electrically connected to a terminal of a terminal board such as a wiring board provided on the housing side of a telephone handset, the electroacoustic conversion unit is, as schematically shown in FIG. By soldering one end of the lead wire 200 to the soldering terminal 101 on the A side, and soldering the other end of the lead wire 200 to the terminal 103 of the terminal plate (counterpart terminal plate) 102 on the housing side. I was there. In addition, in the electroacoustic conversion unit A used for the telephone, two lead wires 200 are required.

[0004]

However, as described with reference to FIG. 9, the end portion of the lead wire 200 is connected to the soldering terminal 101 on the electroacoustic conversion unit A side or the counterpart terminal provided on the housing side of the telephone handset. Since soldering to the terminal 103 of the plate 102 is a troublesome and cumbersome task, especially when the manufacturer of the electroacoustic conversion unit A and the set manufacturer who assembles the unit A into the housing of the telephone handset are different from each other. Is strongly demanded to be able to exchange electric signals between the electroacoustic conversion unit A and the counterpart terminal plate 102 of the telephone handset without soldering. The process of soldering the lead wire 200 as described above from the assembling process in Possible to such assembly simplification and production cost reduction of the process so that it is.

The present invention has been made in view of the above circumstances, and only the step of assembling the electro-acoustic conversion unit in the housing of the telephone handset is performed, and the electro-acoustic conversion unit side is mounted without soldering. (EN) Provided is an electroacoustic conversion unit in which a soldering terminal is electrically connected to a terminal of a counterpart terminal plate provided on the housing side of a telephone handset so that an electric signal can be exchanged between them. To aim.

[0006]

According to a first aspect of the present invention, there is provided an electroacoustic conversion unit in which an elastic band plate-shaped contact is provided to the case of an electroacoustic conversion driver having a soldering terminal provided on the outer surface of the case. The mounting seat portion provided on the piece member is fixed, and the contact piece portion extending from the mount seat portion of the contact piece member is bent in a mountain shape so as to float above the outer surface of the case, and the bent portion is the opposite terminal plate. Of the contact piece, and the tip of the contact piece is slidably supported on the outer surface of the case and supported, and the terminal part extending from the mounting seat of the contact piece has the electrical contact. It is soldered to the soldering terminal of the acoustic conversion driver, faces the back side of the mountain-shaped bent portion of the contact piece member with a gap, and hits the bent portion and exceeds a certain width of the bent portion. Transform A projection for stopping is provided, and a wall portion, which is taller than the projection and has a rising height for projecting a mountain-shaped bent portion of the contact piece member to the outside, is provided at a side portion of the contact piece member. It is said that.

In such an electroacoustic conversion unit, as in the invention according to claim 2, the difference in height between the projection from the outer surface of the case and the wall portion causes the contact in the strip-shaped contact piece member. The thickness is not smaller than the thickness of one piece, that is, the difference in height between the protrusion and the wall is equal to or larger than the thickness of the contact piece. It is desirable to adopt the configuration that According to a third aspect of the present invention, the case is provided with a pair of positioning protrusions for positioning the mounting seat portion of the contact piece member by sandwiching the mounting seat portion from both sides thereof.
As in the invention according to claim 1, the terminal portion and the contact piece portion of the contact piece member extend in opposite directions across the mounting seat portion, and the terminal portion slides the contact piece portion on the outer surface of the case. Adopts a configuration in which it is bent at a right angle to the mounting seat with a bending line orthogonal to the direction and the tip of the terminal is soldered to the soldering terminal of the electroacoustic conversion driver. It is desirable to do.

[0008]

In the invention according to claim 1, the contact piece member having the mounting seat portion fixed to the case of the electroacoustic conversion driver is
It plays the role of the lead wire 200 (see FIG. 9) described at the beginning. That is, simply by assembling the electro-acoustic conversion unit to the housing of the telephone handset, for example, a mountain-shaped bent portion that is a contact point of the contact piece member soldered to the soldering terminal of the case of the electro-acoustic conversion driver is formed. The terminal of the mating terminal plate provided on the housing side is elastically contacted to electrically connect the soldering terminal and the terminal of the mating terminal plate. Moreover, the contact piece member,
Since the tip of the contact piece is slidably contacted with and supported by the outer surface of the case, the contact pressure between the angled bent portion which is the contact and the terminal of the mating terminal plate increases,
The contact reliability is increased accordingly.

Further, since the bent portion of the contact piece portion of the contact piece member hits the protrusion provided on the case of the electroacoustic conversion driver and is prevented from being deformed beyond a certain width, the set of the electroacoustic conversion unit is set. Before, during, and after assembling to the side, even if the angled bent portion of the contact piece of the contact piece member is strongly pushed down for some reason, the contact piece will A situation in which deformation beyond the elastic limit and the original shape cannot be restored is prevented (deformation width regulation action). In addition, since the wall portion provided on the side portion of the contact piece member is taller than the projection and has a rising height that allows the mountain top of the contact piece member to project outward, the mating terminal is formed. By assembling the electroacoustic conversion unit in a state in which the plate is pressed against the wall part, to the set such as a telephone handset, the deformation width of the contact piece part of the contact piece member elastically contacting the terminal of the counterpart terminal plate is made constant This, in combination with the improvement in contact reliability described above, helps to achieve uniform contact stability and uniform current-carrying performance. The effect of contributing to the uniformity of the contact stability and the current-carrying performance is more remarkably exhibited by the invention according to claim 2.

In the invention according to claim 3, the pair of positioning projections exert an action of preventing the lateral displacement of the attachment seat portion of the contact piece member. Therefore, even if the mounting seat of the contact piece member is loosely fixed to the case of the electroacoustic conversion driver to some extent, when the electroacoustic change unit is assembled on the set side, the contact piece of the contact piece member is attached. The chevron-shaped bent portion of the contact part will surely make elastic contact with the terminal of the mating terminal plate, and the sliding direction of the tip of the deformed contact piece on the outer surface of the case will be constant, which will help stabilize the performance. In addition, it is useful for expanding the degree of freedom in selecting fixing means for fixing the mounting seat portion to the case.

In the invention according to claim 4, the terminal portion of the contact piece member is formed by bending the terminal portion of the contact piece member at a right angle to the mounting seat portion with a bending curve orthogonal to the sliding direction of the contact piece portion on the outer surface of the case. The tip of the terminal is soldered to the soldering terminal of the electro-acoustic conversion driver, so that the mounting seat and the case are loosened to some extent in the sliding direction. However, even if there are some cases, the movement of the mounting seat part in the sliding direction due to the deformation of the angled bent part of the contact piece part is absorbed by the bending of the terminal part. It is useful to prevent an unreasonable force from being applied to the soldering portion between the portion and the soldering terminal and to prevent the solder and the terminal from being peeled off.

[0012]

1 is a plan view of an electroacoustic conversion unit A according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a front view thereof.
FIG. 4 is a schematic perspective view in which a part of the unit A is omitted.

The electroacoustic conversion unit (hereinafter, simply referred to as a unit) A is an electroacoustic change driver (hereinafter, referred to as a unit).
A band plate-shaped contact piece member 5 having elasticity is provided in a driver 1.

The driver 1 includes a flat hollow cylindrical case 10 composed of a base 11 and a cover 12 made of a synthetic resin molded body, a yoke, a magnet, a magnetic pole, a diaphragm as a diaphragm, and a voice coil (provided on the diaphragm). A mechanism necessary for the driver 1 such as (not shown) is housed. As can be seen from FIG. 4, mountain-shaped projections 13 and 13 are provided on the upper surface of the case 10 so as to be divided right and left and integrally formed with the cover 12.
A pair of wall portions 14 and 14 integrally formed with the cover 12 are provided on both sides of the wall portions 3 and 13, respectively.
Covers 1 and 4 near the edges corresponding to 4 and 14
A pair of positioning protrusions 15 and 1 formed integrally with
5 are provided. Furthermore, the pair of positioning protrusions 15
A boss portion 16 integrally formed with the cover 12 is projected between the two.

Further, the case 10 is provided with a flat surface 17 having a step with respect to the upper surface in a part of the circumferential direction thereof. Then, as shown in FIG. 1, the wiring board 2 is fixed to the flat surface 17. The wiring board 2 includes soldering terminals 21 and 21 made of a copper foil surface, and two conductors derived from the voice coil are soldered to predetermined positions of the soldering terminals 21 and 21. The conductors are connected to each other, and a bond is raised at the soldering point to protect those conductors.

FIG. 5 shows the contact piece member 5 in a perspective view.
The contact piece member 5 is manufactured by punching or bending a thin metal plate having high elasticity, and as shown in the figure, a rectangular mounting seat portion 51 having an engaging hole 55 and the mounting seat 51. The contact piece portion 5 extending in the opposite direction from the portion 51
2 and the terminal portion 57 are integrally formed, and the contact piece portion 52 has a middle portion bent in a chevron shape and a bent portion 53 serving as a contact point, and a tip portion of the chevron bent portion 53 (that is, The tip end portion 54) of the contact piece portion 52 is bent so as to protrude forward so as to be easily slid on the upper surface of the case 10. Further, the terminal portion 57 is formed by bending at a right angle with respect to the mounting seat portion 51 at a bending line 58 orthogonal to the sliding direction described later, and the end portion of the terminal portion 57 is bent toward the rear side. And is used as a soldering portion 59.

In this contact piece member 5, the rectangular mounting seat portion 51 is fitted between the pair of positioning projections 15 of the case 10, the boss portion 16 is inserted into the engaging hole 55, and the boss portion 16 is inserted. It is fixed to the case 10 by heating and crushing the top portion as shown in FIG. 1 and FIGS. In the contact piece member 5 fixed to the coil 10 in this manner, the mountain-shaped bent portion 53 of the contact piece portion 52 has the pair of wall portions 14.
Is provided so as to straddle the protrusion 13 from the rear to the front between the two, and the tip end portion 54 of the contact piece portion 52 has the case 10.
Is slidably supported on the upper surface (outer surface) of the. Further, the soldering portion 59 of the terminal portion 57 of the contact piece member 5 is superposed on the soldering terminal 21 of the wiring board 2 and soldered. Here, the pair of the positioning projections 15 exerts an action of preventing the lateral displacement of the attachment seat portion 51 of the contact piece member 5. Therefore, the mounting seat 51
The engaging hole 55 is slightly larger than the boss 16 on the case 10 side, and the mounting seat 51 is loosened to some extent by heating and crushing the boss 16 (actually, Even if such a thing hardly occurs), the position of the contact piece portion 52 is accurately determined to some extent, and the contact piece portion is reliably elastically contacted with the terminal of the counterpart terminal plate P described later. Along with the deformation of 52, the sliding direction of the tip portion 54 on the outer surface of the case 10 is constant, which helps stabilize the performance. Therefore, in addition to the means for heating and crushing the boss portion 16 as a means for fixing the mounting seat portion 51 to the case 10, a simpler means than that can be adopted.

FIG. 6 is a partially omitted sectional view taken along line VI-VI in FIG. In the figure, reference symbol H is the rising height of the wall portion 14 from the upper surface of the case 10, h is the rising height of the protrusion 13 from the upper surface of the case 10, and L is the rising height H of the wall portion.
And the rising height h of the protrusion 13, and t represents each thickness of the contact piece portion 52. As can be seen from the figure, the projection 13 faces the back surface of the mountain-shaped bent portion 53 of the contact piece member 5 with a gap. The rising height dimension H of the wall portion 14 is larger than the rising height dimension h of the protrusion 13. Therefore, as shown in FIG. 3 and FIG. 7, the unit A is assembled to a set (not shown) such as a telephone handset and the counterpart terminal plate P fixed to the housing (not shown) of the set is attached to the wall portion 14. In the case of pressing, the deformation width of the contact piece portion 52 elastically contacting the terminal of the counterpart terminal plate P becomes constant, which is useful for achieving uniform contact stability and current-carrying performance.
Then, in this case, as shown in FIG.
A gap S is formed between the bent portion 53 of the second mountain and the top of the protrusion 13.
Therefore, the mountain-shaped bent portion 53 is prevented from hitting the protrusion 13 and being bent. In the unit A used in the handset of the mobile phone, it is possible to set the above L to 0.3 mm and t to 0.2 mm, and in that case, the above gap S is 0.1 m.
m is secured. It is also possible to make H and h equal to each other, and in that case, L = 0.

As shown in FIGS. 3 and 7, the unit A is assembled to a set (not shown) such as a telephone handset, and the counterpart terminal plate P fixed to the housing (not shown) of the set is attached to the wall portion 14. When pressed, the chevron-shaped bent portion 53, which serves as a contact point of the contact piece member 5, makes elastic contact with the terminal of the mating terminal plate P so that the soldering terminals 21 and 21 on the unit A side and the terminal of the mating terminal plate P come into contact with each other. Since they are electrically connected, they can be electrically connected without soldering when assembling the unit A to the set. Moreover,
Since the tip end portion 54 of the contact piece portion 52 slidably contacts and is supported by the outer surface of the case 10, the contact pressure between the chevron bent portion 53 and the terminal of the mating terminal plate P increases, and the contact reliability increases accordingly. There is an advantage that the property is enhanced.

By the way, the bent portion 53 of the contact piece portion 52 is unexpected as shown in FIG. 8 before, during, and after assembling the unit A to the set side. External force F may be applied, and such external force F
When the force is applied, the bent portion 53 will be pushed to a position lower than the upper side of the wall portion 14. However, in this unit A, the protrusion 13 hits the bent portion 53 and prevents the bent portion 53 from being deformed beyond a certain width as shown in FIG. (See) has such a size as to prevent the contact piece portion 52 from being deformed beyond the elastic deformation, the contact piece portion 52 is elastically pressed even if the contact piece portion 52 is strongly pushed down. A situation in which the contact piece member 5 is deformed beyond its limit and cannot be restored to its original shape is prevented, and so-called "settling" of the contact piece member 5 is prevented.

On the other hand, as described with reference to FIG. 5, the contact piece member 5
The terminal portion 57 is formed by bending the tip end portion 54 of the contact piece portion 52 on the outer surface of the case 10 at a right angle with respect to the mounting seat portion 51 at a bending line 58 orthogonal to the sliding direction X.
Even if the fixing of the mounting seat 51 and the case 10 is loose to some extent in the sliding direction X as described above, as shown in FIG. 7 and FIG. When the portion 53 is deformed and the deformation has an effect on the terminal portion 57, the terminal portion 57 is bent by the bending line 58.
Bend at and absorb the effect. Therefore, it becomes difficult to apply an unreasonable force to the soldering portion between the soldering portion 59 of the terminal portion 57 and the soldering terminal 21, which helps prevent soldering and peeling of the terminal.

The unit A according to the present invention can be used not only for the receiving side of a telephone handset but also for other communication equipment sets.

[0023]

The electroacoustic conversion unit of the invention according to claims 1 and 2 is itself provided with the contact piece member serving as the lead wire described in the conventional example, and the electroacoustic conversion unit is provided. Just by assembling it to a set such as a telephone handset, the soldering terminal of the electroacoustic conversion unit and the terminal of the counterpart terminal board are electrically connected via the contact piece member, which is troublesome on the set maker side. There is no need to perform a troublesome soldering process. The tip of the contact piece is slidably contacted with and supported by the outer surface of the case, so that the contact reliability with the terminal of the counterpart terminal plate is enhanced, and the electroacoustic conversion is performed. Uniformity of contact stability and current-carrying performance is achieved by the deformation width restricting action of the contact piece member by the protrusion provided on the case of the driver.

According to the third aspect of the present invention, even if the fixing of the mounting seat portion and the case is loose to some extent in the sliding direction, the contact piece portion of the contact piece member has a chevron shape. The bent portion and the terminal of the mating terminal plate are securely elastically contacted, and the sliding direction of the tip of the deformed contact piece is constant to stabilize the performance, and at the same time, the mounting seat of the contact piece member is attached. There is an advantage that the degree of freedom in selecting means for fixing is expanded.

According to the fourth aspect of the invention, since the movement of the attachment seat portion in the sliding direction of the contact piece member is absorbed by the bending of the terminal portion, even if the attachment seat portion moves, the contact piece member is moved. It is possible to prevent a situation in which an unreasonable force is applied to the soldering portion between the terminal portion and the soldering terminal to cause soldering or peeling of the terminal.

[Brief description of drawings]

FIG. 1 is a plan view of an electroacoustic conversion unit according to an embodiment of the present invention.

FIG. 2 is a side view of the unit.

FIG. 3 is a front view of the unit.

FIG. 4 is a schematic perspective view showing a part of the unit omitted.

FIG. 5 is a perspective view of a contact piece member.

6 is a partially omitted cross-sectional view taken along the line VI-VI of FIG.

FIG. 7 is a partially omitted cross-sectional view showing a deformed state of a contact piece portion pushed by a counterpart terminal plate.

FIG. 8 is a partially omitted cross-sectional view for explaining a deformation width regulating action by a protrusion.

FIG. 9 is an explanatory diagram of a conventional electroacoustic conversion unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electroacoustic conversion driver 5 Contact piece member 10 Case 13 Protrusion 14 Wall portion 15 Positioning protrusion 21 Soldering terminal 51 Mounting seat portion 52 Contact piece portion 53 Bent portion 54 Tip of contact piece portion 57 Terminal portion 58 Bending curve H wall Rise height of the part h Rise height of the protrusion L Difference in height between the protrusion and the wall t Thickness of the contact piece X Sliding direction of the contact piece P Counter terminal plate

Claims (4)

[Claims] 1. A mounting seat portion provided on a strip-shaped contact piece member having elasticity is fixed to the case of the electroacoustic conversion driver in which terminals for soldering are arranged on the outer surface of the case. The contact piece portion extending from the mounting seat portion of the piece member is bent in a mountain shape so as to float above the outer surface of the case, and the bent portion serves as a contact corresponding to the terminal of the counterpart terminal plate, and the contact piece portion The tip portion is slidably contacted and supported on the outer surface of the case, and the terminal portion extended from the mounting seat portion of the contact piece member is soldered to the soldering terminal of the electroacoustic conversion driver, The case is provided with a protrusion that opposes the back surface of the mountain-shaped bent portion of the contact piece member with a gap therebetween and that prevents the deformation of the bent portion beyond a certain width by hitting the bent portion. Member side Electro-acoustic conversion unit, wherein a wall portion having a rising height protruded outward Yamagata bends tall a and the contact piece member than the projection at the site is provided. 2. The electroacoustic transducer according to claim 1, wherein the difference in height between the projection from the outer surface of the case and the wall is not smaller than the thickness of the contact piece in the strip-shaped contact piece member. unit. 3. The electroacoustic conversion unit according to claim 1, wherein the case is provided with a pair of positioning protrusions for positioning the mounting seat portion of the contact piece member by sandwiching the mounting seat portion from both sides thereof. 4. The terminal portion and the contact piece portion of the contact piece member extend in opposite directions across the mounting seat portion, and the terminal portion extends in the sliding direction of the contact piece portion on the outer surface of the case. 2. A bent portion formed by bending at right angles to a mounting seat portion with orthogonal bending lines, and a tip portion of the terminal portion is soldered to a soldering terminal of an electroacoustic conversion driver.
The electroacoustic conversion unit according to claim 2, claim 3, or claim 4.