JP2596383Y2 - 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 electro-acoustic conversion unit used for an electro-acoustic conversion type communication device such as a mobile telephone.

[0002]

2. Description of the Related Art The following is known as an electroacoustic conversion unit employed on the receiving side of a telephone handset. That is, a wiring board is provided on one side of the resin frame, and a diaphragm provided with a voice coil and other components such as a magnet and a yoke necessary for electroacoustic conversion are held on the other side of the resin frame. There is known an electroacoustic conversion unit in which a conductor derived from the voice coil is connected to the conductor foil.

When the above-described electroacoustic conversion unit is electrically connected to a predetermined conductor foil of a wiring board fixed to a case of a telephone handset, the following two means have conventionally been used in many cases.

One is that one end of a lead wire is soldered to a conductor foil of a wiring board on the electroacoustic conversion unit side, and the other end of the lead wire is drawn out of the conductor foil of the case side wiring board. Another method is to solder a lead wire with a connector to the conductor foil of the wiring board on the electroacoustic conversion unit side, and then attach the connector to the case-side wiring board. This is a means for connecting to the provided mating connector. In the electroacoustic conversion unit used for the telephone, two lead wires are required.

[0005]

However, the conventional means requires a troublesome process such as soldering the lead wires or soldering the lead wires to the terminals of the connector. The means has a problem that an expensive connector is required.

Further, when assembling a telephone handset using a conventional electroacoustic conversion unit, in addition to the step of attaching the electroacoustic conversion unit to the cover of the handset, soldering of the lead wires and connection of the connectors as described above are performed. A separate process of connecting and electrically connecting the electroacoustic conversion unit to a predetermined conductor foil of the wiring board on the case side of the telephone handset requires a separate process, which increases the number of man-hours for assembling the telephone handset. This was one of the causes of soaring costs.

The present invention has been made in view of the above problems. When a process for assembling an electroacoustic conversion unit and a case-side wiring board in a case of a telephone handset is performed, the electroacoustic conversion unit is simultaneously performed in the process. The step of electrically connecting the terminal to a predetermined conductor foil of the wiring board on the case side of the telephone handset is devised so that the latter step is not required to be performed as a separate step, and is described at the beginning. It is an object of the present invention to provide an electroacoustic conversion unit which can eliminate the need for soldering between lead wires, and can eliminate the use of lead wires and connectors.

[0008]

According to a first aspect of the present invention, there is provided an electroacoustic conversion unit, wherein a wiring board is provided on one side of a resin frame, and the conductive foil of the wiring board is held on the other side of the resin frame. In the electro-acoustic conversion unit to which the conductor derived from the voice coil for vibrating the diaphragm is connected, the contact of the terminal made of an elastic wire having the contact is raised from one side of the resin frame. This terminal is provided on one side of the resin frame, and near the base end of the terminal.
A mounting portion of a predetermined length is provided, and this mounting portion is
This is fitted into the mounting groove provided on one side of the
Fixed to one side of the resin frame to cover the mounting groove
Mounting by the wiring board and the bottom of the mounting groove
Part is pinched and bent above this mounting part
The base end penetrates through the wiring board and leads to the outside surface of the wiring board.
It faces the body foil and is soldered to the conductor foil.

According to a second aspect of the present invention, there is provided an electroacoustic conversion unit.
2. A terminal according to claim 1 , wherein a contact piece bent in a chevron shape is formed at a portion of the terminal other than the base end and the mounting portion, and a bent portion of the contact piece serves as a contact point. The base and the free end of the contact piece bent into a chevron are fitted into a holding groove formed on one side of the resin frame, and the contact elastically contacts the counterpart terminal in this holding groove. Is provided with a stopper surface for restricting the sliding displacement of the free end of the contact piece when it is displaced in a direction approaching one surface of the wiring board.

The electroacoustic conversion unit according to claim 3 is
According to the second aspect , the other terminal is a conductive foil provided on a wiring board fixed to a case such as a telephone handset.

[0011]

In the electroacoustic conversion unit according to the first aspect of the present invention, the terminal made of the elastic wire whose base end is soldered to the conductor foil of the wiring board plays the role of the lead wire described at the beginning.

[0012] Further , since the terminal mounting portion is sandwiched between the wiring board and the groove bottom of the mounting groove on the resin frame side, the influence of displacement of the contact of the terminal is affected by the outer surface of the wiring substrate. Of the terminal soldered to the conductive foil. In other words, even if the contact of the terminal is displaced, the base end of the terminal is not displaced under the influence of the displacement. Therefore, the solder joining the conductor foil of the wiring board and the base end of the terminal does not peel off, and the conductor foil does not peel off from the wiring board.

In the electroacoustic conversion unit according to the second aspect of the present invention, when the free end of the terminal slides in the holding groove on the resin frame side as the contact of the terminal is displaced, the stopper surface is used for the displacement. Since the sliding displacement of the free end of the terminal is restricted, the contact is not displaced indefinitely, and the contact pressure of the contact with the counterpart terminal is guaranteed.

In the electroacoustic conversion unit according to the third aspect of the present invention, when a step of assembling the electroacoustic conversion unit and the case-side wiring board to a case such as a telephone handset is performed, the contact of the terminal of the electroacoustic conversion unit is changed. The other terminal is electrically connected to the conductor foil of the case-side wiring board of the telephone handset.

[0015]

1 is a plan view of an electroacoustic conversion unit A according to an embodiment of the present invention, as viewed from one side of a resin frame 1 used in the electroacoustic conversion unit. FIG. 2 is a cross section taken along line II-II of FIG. FIG. 3 is a sectional view taken along line III-III in FIG.
FIG. 4 is an enlarged sectional view of a main part of FIG.

The resin frame 1 has a disk shape. A rectangular projecting portion 2 is provided at a central portion on one side of the resin frame 1. On one side of the resin frame 1, the protruding portion 2 is provided with holding grooves 3, 3 of a predetermined length distributed to the left and right, and the side surfaces of the protruding portion 2 are provided with the holding grooves 3, 3. Continuous short grooves 4, 4 are provided, and mounting grooves 5, 5 which are continuous with the grooves 4, 4 are provided on one side of the resin frame 1 on one side of the protrusion 2. A pair of left and right holding grooves 3, 3, short grooves 4, 4 and mounting grooves 5, 5 are provided.
Are parallel to each other. Also, the holding grooves 3, 3
Is closed at one end, and the surface that covers one end of the holding grooves 3, 3 is a stopper surface 31, 31.

Reference numeral 6 denotes a terminal made of an elastic wire having a circular cross section or a rectangular cross section. The terminal 6 has a mounting portion 62 near the base end 61 and having substantially the same length as the mounting groove 5. At the same time, the base end 61 is bent at right angles to the mounting portion 62. Also, the base end 6 of the terminal 6
A portion excluding 1 and the attachment portion 62 is formed as a contact piece 63 bent in a mountain shape, and a bent portion of the contact piece 63 serves as a contact point 64. The horizontal length of the contact piece 63 in a no-load state is slightly shorter than the length of the holding groove 3. For the terminal 6, a wire material obtained by plating a phosphor bronze wire, such as that used for a contact portion such as a telephone modular jack, with gold plating or the like can be suitably used.

The terminal 6 has a mounting portion 62 fitted in the mounting groove 5, and a base 63a and a free end 63b of a contact piece 63 are connected to the holding groove 3 as shown in FIG. Mated.

The wiring board 7 is fixed to a board installation location formed on one side of the resin frame 1 on the side of the protrusion 2. The board installation location includes the location where the mounting groove 5 is formed. Therefore, the mounting groove 5 is covered by the wiring board 7 fixed to the board installation location. The depth of the mounting groove 5 and the thickness (or thickness) of the mounting portion 62 of the terminal 6 are such that the mounting portion 62 is sandwiched between the wiring board 7 and the bottom of the mounting groove 5. ing. The wiring board 7 and the resin frame 1 can be fixed by bonding using an adhesive or by thermally deforming a protruding portion integrally provided on the resin frame 1 side so that the edge of the wiring board 7 is formed by the resin frame. You can also press it against 1. Here, a pair of conductive foils 71 are formed in a predetermined pattern on the outer surface side of the wiring board 7 so as to be divided into right and left sides. Is penetrated. Thus, the conductor foil 7
The base end 61 of the terminal 6 facing 1 is soldered to the conductor foil 71. Numeral 72 indicates solder piled up at the soldering point.

On the other side of the resin frame 1, the protruding portion 2 has a concave shape, and an iron yoke 81, a magnet 82, and an iron magnetic pole 83 are provided inside the protruding portion 2. A diaphragm 85 is fitted and held on a circular rib 84 provided along the outer peripheral edge of the resin frame 1. Two conductors (not shown) are led out of the voice coil 86 provided in the diaphragm 85 and inserted into the gap in the magnetic circuit, and these conductors are connected to the conductor foils 71, 71 of the wiring board 7. Connected to each other.

In the electroacoustic conversion unit described above, the terminal 6 is assembled to the resin frame 1 prior to the wiring board 7, but when the terminal 6 is assembled, as shown in FIG. Since the free end 63b is supported from the left and right by the holding groove 3, the terminal 6 is prevented from falling down until the wiring board 7 is assembled, and is temporarily held in that state. Then, when the wiring board 7 is joined to the resin frame 1 and the base end 61 of the terminal 6 is soldered to the conductor foil 71 (FIG. 4), the base end 61 of the terminal 6 is connected via the solder 72. The terminal 6 is fixed to the wiring board 7, and the mounting portion 62 of the terminal 6 is sandwiched between the wiring board 7 and the groove bottom of the mounting groove 5, so that the terminal 6 is permanently fixed. In this fully fixed state, the free end 63a of the terminal 6 is opposed to the stopper surface 31 with a slight gap in a no-load state as shown in FIG.

FIG. 5 is a partial longitudinal side view showing a receiving side of a telephone handset assembled using the above-described electro-acoustic conversion unit A, and FIG. 6 is a side view of the electro-acoustic conversion unit A and the case-side wiring board 9 of the handset. FIG. 4 is a partial vertical sectional front view showing the positional relationship of FIG.

Reference numeral 100 denotes a case provided with a sound hole 101, and an electroacoustic conversion unit A is fitted in a circular frame 110 provided in the case 100. Case 10
The wiring board 9 is mounted on the post 120
1 is fixed. Here, the wiring substrate 9 on the case 100 side is provided with the
After assembling at 0, it is screwed to the post 120. Then, when screwing to the post 120, the case 100
The conductor foil (not shown) of the wiring board 9 on the side contacts the contact 64 of the terminal 6, and the set screw 91 is tightened to fix the wiring board 9 to the case 100. It is displaced in a direction approaching one side. Accordingly, the free end 63 b of the contact piece 63 of the terminal 6 slides on the groove bottom of the holding groove 3 and hits the stopper surface 31. For this reason, the contact pressure between the contact 64 and the conductor foil of the wiring board 9 is such that the contact 64 of the terminal 6 in which the free end 63 b of the contact piece 63 is slid indefinitely is resilient on the conductor foil of the wiring board 9. The contact pressure becomes larger than the contact pressure between the two in the contact state, and the contact reliability is improved accordingly. In addition,
In FIG. 5, the shape of the contact piece 63 in a no-load state is indicated by a virtual line.

By the way, in the telephone handset described with reference to FIGS. 5 and 6, the terminal 6 of the electroacoustic conversion unit A is configured such that the contact piece 63 receives the pressing force of the wiring board 9 on the case 100 side to have its own elasticity. Deflected against.
However, as shown enlarged in FIG. 4, the terminal 6 has its mounting portion 62 sandwiched between the wiring board 7 fixed to the resin frame 1 and the groove bottom of the mounting groove 5, so that the terminal 6 is mounted. The portion 62 is fixed so as not to move.
Therefore, when the contact piece 63 is bent and the contact 64 is displaced, the influence of the contact 64 is unlikely to reach the base end 61 of the terminal 6. The situation that the 61 is displaced hardly occurs. Accordingly, there is little possibility that the solder 72 joining the conductor foil 71 of the wiring board 7 and the base end 61 of the terminal 6 is peeled off, or that the conductor foil 71 is peeled from the wiring board 7.

In the electroacoustic conversion unit of this embodiment, when the contact 64 of the terminal 6 is displaced and the free end 63b of the terminal 6 is slid in the holding groove 3 on the resin frame 1 side, Although the sliding displacement of the free end 63b of the terminal 6 is restricted by the stopper surface 31, it is not always necessary to adopt such a configuration, and the free end 63b of the terminal 6 is
5, that is, even when the contact piece 63 is bent as shown by the solid line in FIG.
In this case, the contact 64 resiliently contacts the conductive foil of the wiring board 9 due to the elasticity of the contact piece 63 to maintain the electrical connection state.

Further, in this embodiment, the contact piece 63 of the terminal 6 is formed in a mountain shape so that the contact point 64 is raised from one side of the resin frame 1. Even in such a shape, it is only necessary that the contacts are raised from one side of the resin frame in a state where the terminals are provided on one side of the resin frame. That is, it is only necessary that a margin for bending of the contact piece portion is secured between the resin frame and the contact.

The electro-acoustic conversion unit A according to the present invention comprises:
The present invention can be used not only for the receiving side of the telephone handset as in the embodiment, but also for other communication device sets.

[0028]

The electroacoustic conversion unit according to the first aspect of the present invention has a terminal made of an elastic wire material soldered to a conductor foil of a wiring board to which a conductor of a voice coil is connected, which itself serves as a lead wire. Since it is provided, it is not necessary to separately solder a lead wire to the conductor foil. For this reason,
This eliminates the need for separate leads and connectors as in the conventional example described at the beginning, reduces the number of parts required when assembling a telephone handset, etc., and reduces costs accordingly. The troublesome process of attaching and soldering the lead wire to the terminal of the connector becomes unnecessary.

Further , even if the contact of the terminal is displaced, the influence of the displacement is difficult to reach to the base end of the terminal. And the peeling of the conductive foil from the wiring board is less likely to occur. Therefore, there is an effect that the reliability of the joint at the soldering portion does not decrease due to the provision of the terminal made of the elastic wire material instead of the lead wire.

In the electroacoustic conversion unit according to the second aspect of the present invention, the slide pressure of the free end of the contact piece provided on the terminal is regulated by the stopper surface, so that the contact pressure between the contact and the counterpart terminal is ensured. Therefore, there is an effect that the contact reliability between them is enhanced.

The electro-acoustic conversion unit according to the third aspect of the present invention is a process for assembling the electro-acoustic conversion unit and the case-side wiring board to a case such as a telephone handset, and the electro-acoustic conversion unit is connected to the case of the telephone handset. Since the process of electrically connecting to the predetermined conductor foil of the wiring board on the side is performed, the number of assembly steps for a telephone handset and the like is reduced, so that soldering between lead wires becomes unnecessary, and furthermore, the use of lead wires and connectors is not required. It is possible to assemble a telephone handset or the like without using a telephone.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional view of a main part of FIG. 2;

FIG. 5 is a partial vertical sectional side view showing a receiving side portion of the telephone handset assembled using the electroacoustic conversion unit.

FIG. 6 is a partial vertical sectional front view showing a positional relationship between an electroacoustic conversion unit of the handset and a case-side wiring board.

[Explanation of symbols]

 Reference Signs List A electroacoustic conversion unit 1 resin frame 3 holding groove 5 mounting groove 6 terminal 7 wiring board 9 wiring board fixed to case 31 stopper surface 61 terminal base 62 terminal mounting 63 contact piece 64 contact 63a Base of contact piece 63b Free end of contact piece 64 Contact 71 Conductive foil 85 Diaphragm 86 Voice coil

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 60-119772 (JP, U) Japanese Utility Model 1-63298 (JP, U) Japanese Utility Model 2-73899 (JP, U) (58) Survey Field (Int.Cl. ⁶ , DB name) H04M 1/02-1/23

Claims (3)

(57) [Scope of request for utility model registration] A wiring board is provided on one side of a resin frame, and a conductor derived from a voice coil for vibrating a diaphragm held on the other side of the resin frame is provided on a conductor foil of the wiring board. In the connected electroacoustic conversion unit, the terminal is provided on one side of the resin frame so that the contact of the terminal made of an elastic wire having the contact is raised from one side of the resin frame. A mounting portion of a predetermined length is provided near the base end of the terminal.
The mounting part is provided on one side of the resin frame.
Into the mounting groove, and cover the mounting groove
The wiring board fixed to one side of the frame and the mounting
The mounting part is sandwiched between the groove bottom and the groove.
The base end bent with respect to the attachment portion penetrates the wiring board.
An electro-acoustic conversion unit characterized in that the electro-acoustic conversion unit faces the conductor foil on the outer surface side of the wiring board and is soldered to the conductor foil. 2. A contact piece bent in a chevron shape is formed at a portion of the terminal other than the base end and the mounting portion.
The bent portion of the contact piece portion serves as a contact point, and the base and free end of the contact piece portion bent into a chevron are fitted into the holding groove formed on one side of the resin frame. the groove for holding, and a stopper surface for regulating the sliding displacement of the free end of the contact piece is provided when displaced in a direction in which the contacts elastic contact with the counterpart terminal approaches the one surface of the wiring board 請
The electroacoustic conversion unit according to claim 1. 3. The electroacoustic conversion unit according to claim 2 , wherein the other terminal is a conductor foil provided on a wiring board fixed to a case such as a telephone handset.