JP2002100424A - Electrical connector and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical connector allowing a pressing operation or the like between boards or the like with a very low load and of assuring connection thereof, in connecting the connector to the terminal electrodes of an electronic circuit board or the like, without distorting a circuit member, such as the package thereof, the electronic circuit board or a liquid crystal module, or damaging a mounted component thereof, and to provide its manufacturing method. SOLUTION: This connector has an electrically insulating plate and plural conductive wires formed piercingly in the thickness direction of the plate, both ends of each of the conductive wire are used as contact parts, the electrically insulating plate has an elastic body elastically deformable in the thickness direction of the plate, and each of the conductive wires is extensible, according to the deformation of the elastic body embedded in the elastic body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrical connector in which both ends of a conductive wire rod penetrating in a thickness direction of an electrically insulating material plate are contact portions (or connector portions). In detail, the connection inspection between the surface mount LSI and the electronic circuit board, the connection between the surface mount LSI and the electronic circuit board, the connection between the electronic circuit boards, the connection between the liquid crystal module and the circuit board, the mobile phone Electrical connector used for connection between a microphone or a speaker and a circuit board, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Connection inspection between a surface mount LSI and an electronic circuit board typified by QFP, LGA, BGA, etc., connection between a surface mount LSI and an electronic circuit board, connection between electronic circuit boards, liquid crystal module Conventionally, the connection between the power supply and the circuit board, the connection between the microphone of the mobile phone or the speaker and the circuit board, and the like are performed by an electric connector 7 as shown in FIG.
0 is used. The electrical connector 70 includes an electrical insulator material layer (or plate) 72 and conductive thin metal wires 74, and a plurality of conductive metal thin wires 74 are provided in the thickness direction of the electrical insulating material layer 72. Further, the electrical connector 70 is usually manufactured by slicing a material block in which a plurality of conductive metal wires 74 are linearly and parallelly arranged in an insulating material in a direction perpendicular to the conductive metal wires 74. I have.

When the electrical connector 70 is subjected to inspection or mounted, the electrical connector 70 may be connected between a terminal electrode of the surface mount LSI and an electrode of the inspection circuit board or between an electrode of the electronic circuit board and an electrode of the inspection circuit board. The electrical connection is made while the electrical connector 70 is clamped. The conventional electrical connector 70 includes:
The distal end 76 of the conductive thin metal wire 74 is
Because it is almost flush with the surface of the board, it is necessary to sufficiently clamp the board etc. to stabilize the connection of the connector part,
The weighted bias at that time was very large.

[0004] In recent years, the surface mount type LSI has been increased in the number of pins and reduced in size and thickness, and accordingly, the pitch and area of the terminal electrodes of the LSI have been reduced, and the LSI itself has been reduced in size and thickness. Attempts to connect such a surface-mounted LSI with the conventional electrical connector 70 may cause bending or damage to the terminal electrodes of the surface-mounted LSI, distortion of the package, and unstable connection. There is a problem. In addition, the terminal electrodes of the LGA are formed on the same plane as the package.
m, and about 0.5 mm. Even if such a connector is sufficiently pressurized with a conventional electrical connector, the connection may be incomplete or may not be possible. Further, the electronic circuit board or the like particularly has a multi-layer structure of the circuit board and tends to be thin (the thickness may be 0.5 mm or less), and a high weight is applied to the electronic circuit board at the time of connection. When pressure is applied, problems such as damage to the electronic circuit board (cutting of the circuit, distortion, peeling of mounted components due to distortion, etc.) occur, resulting in poor connection, which is one of the causes of lower quality and higher manufacturing cost. .

[0005]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method of connecting a terminal electrode of an electronic circuit board or the like to distorting a circuit member such as a package, an electronic circuit board, a liquid crystal module, or mounting the circuit member. Provided is an electrical connector that can prevent a component from being damaged, can apply a very low load to a press operation between boards and the like, and can reliably connect the electrical connector, and a method of manufacturing the same. Is to do.

[0006]

SUMMARY OF THE INVENTION The present invention has an electric insulating plate and a plurality of conductive wires penetrating in the thickness direction of the plate, and both ends of the conductive wires serve as contact portions. A connector, wherein the electrically insulating plate has an elastic body that elastically deforms in a thickness direction of the plate, and the conductive wire is embedded in the elastic body and expands and contracts according to the deformation of the elastic body. The above object has been achieved by providing an electrical connector characterized by the above-mentioned.

[0007] Here, that the electrically insulating plate has an elastic body which is elastically deformed in the thickness direction of the plate means that the entire plate itself may be an elastic body, or the elastic body may be formed in a part of the plate. It may be formed or provided separately. The elastic material is not particularly limited as long as it has rubber-like elasticity at room temperature and is elastically deformable in the thickness direction of the plate. The conductive wire is penetrated through the elastic body and buried in the elastic body, as long as it can expand and contract in response to the deformation of the elastic body, it is not limited to its characteristics or shape, It is desirable that the conductive wire be formed in a coil shape or a ninety-nine folded shape in order to allow the elastic body to sufficiently cooperate with the deformation of the elastic body and to maintain the elastic characteristics similarly to the elastic body. Further, as described later, it is desirable to provide a plurality of small holes in the plate and dispose the elastic body and the conductive wire in the small holes from the viewpoint of the function and the manufacturing.

In the electrical connector according to the present invention, the elastic body exhibits a rubber-like elasticity function at room temperature, and the conductive wire can expand and contract, so that the elastic wire moves in accordance with the deformation of the elastic body. Therefore, as shown in FIGS. 4 to 6, which will be described later, when connected to an electronic circuit board, a circuit board, a liquid crystal module, or the like, the contact portions at both ends of the conductive wire are elastically biased by the elastic body. Each of the substrate electrodes is securely pressed to ensure the connection. Therefore, when the elastic member of the electric connector is slightly deformed or distorted at the time of connection with the terminal electrode of the electronic circuit board or the like, the circuit members such as the electronic circuit board and the liquid crystal module involved in the pinching of the electric connector are distorted. There is no danger of damaging or damaging the mounted components. In addition, the operation of pressurizing or pinching between the substrates and the like can be performed with low load, and as a result, the connection can be ensured.

[0009]

Embodiments of the present invention will be described below in detail. An electrical connector according to the present invention includes an electrically insulating plate and a plurality of conductive wires penetrating in a thickness direction of the plate, and both ends of the conductive wires serve as contact portions of electrodes such as a substrate. It is.

The electrically insulating plate has an elastic body which is elastically deformed in the thickness direction of the plate. The entirety of the electrically insulating plate may be an elastic body which is elastically deformed in the thickness direction, or a structure in which a part of the electrically insulating plate is cut off and an elastic body is arranged in that part. That is, as long as the conductive wire is buried in a member having rubber-like elasticity at room temperature, the electrical connector according to the present invention can exhibit its effect.

In the present invention, in particular, the electrically insulating plate comprises a resin plate having a plurality of small holes penetrating in the thickness direction of the plate and having the elastic body provided in the small holes. The contact portion is formed in a substantially spherical shape, and the conductive wire is embedded in the elastic body to form a connector member of the elastic body and the wire,
The connector member may be inserted and held in the small hole.

The electrically insulating plate and the connector member having such a configuration are extremely advantageous in manufacturing. That is, when a connector member is manufactured by embedding the conductive wire in the elastic body, a covering portion and an uncovered portion of the elastic body are alternately provided on a long conductive wire, and the conductive wire is provided. By cutting at the uncovered portion, mass production of the connector member is facilitated, and since the connector member can be easily attached to the small hole, the manufacturing process can be saved.

Further, when cutting the long conductive wire, it is possible to use laser irradiation or the like, and the contact portion (cut end) of the wire can be immediately made substantially spherical. If the contact portion is spherical, surface connection is possible instead of point connection at the cut end surface of the thin metal wire as in a conventional electric connector, and the stability of the connection of the electric connector is improved. Examples of the shape of such a contact portion include a substantially spherical shape, for example, a hemispherical shape, an elliptical hemispherical shape, a spherical shape, and the like, and the diameter thereof is in the range of 0.1 to 0.4 mm, particularly 0.2 to 0. .3mm
Is desirably within the range. In the contact portion having a diameter within the above range, the stability at the time of connection is extremely improved. In a contact portion having a diameter smaller than the above range, it is difficult to form the conductive wire into a substantially spherical shape. In the contact portion having a diameter exceeding the above range, the substantially spherical shape becomes too large in diameter, becomes larger than the diameter of the coil shape or the width of the ninety-nine folded shape, and the insulation between the substantially spherical shapes can be reliably maintained. May be lost, and connection reliability will be degraded.

The above-mentioned electrically insulating plate is usually rectangular or circular, but need not be limited to rectangular or circular as long as it conforms to the shape of the circuit board used for each connection. The thickness of the electrically insulating plate is 1
It is preferably in the range of 1 to 1.5 mm. When the thickness of the plate is within the above range, while the stretchability and elasticity of the conductive wire are sufficiently ensured, it is possible to provide a thin electrical connector which is not affected as much as possible by external noise. . When the thickness of the plate is less than the above range, the conductive wire has poor elasticity and elasticity in an elastic body described later. If the thickness of the plate exceeds the above range, the electrical connector is likely to be affected by external electrical noise. The above-mentioned electrically insulating plate is preferably provided with positioning holes and fixing holes on the plate, and if such holes are provided, handling during manufacture, installation, or use becomes easy.

As the material of the electrically insulating plate, in addition to the use of an insulating elastomer described later, an organic material such as a thermoplastic or thermosetting plastic and an inorganic material such as a ceramic material can be exemplified. In particular,
Considering workability and moldability, a versatile thermoplastic resin material is preferred. As such a thermoplastic resin, polyethylene, α-olefin resin such as polypropylene,
Amorphous cyclic olefin resin, PS resin, AS resin, A
Styrene copolymer such as SB resin, acrylic resin, acrylamide resin, acetal resin, cellulose resin, vinyl chloride resin, vinylidene chloride resin, fluorine resin, carbonate resin, etc. In view of this, versatile engineering plastics are desirable. When the electrical connector is used for testing various LSIs, it is desirable to select a resin material having particularly excellent heat resistance and dimensional stability.

As long as the elastic body has rubber elasticity at room temperature and elastically deforms in the thickness direction of the plate, the kind of the material need not be limited, but an insulating elastomer is preferable. The elastic body holding the conductive wire is preferably insulative because the shape and pitch of the electrodes of the LSI or the inspection circuit board and the electronic circuit board to be connected are small. In the present invention, the rubber hardness of the elastic body at room temperature is 50 ° H or less, 5 ° H or more, preferably 10 ° H or more.
It is desirably in the range of 50 to 50 ° H, more preferably in the range of 20 to 40 ° H. Since the conductive wire is embedded in the elastic body, the elastic body and the conductive wire are pressed together by a circuit board or the like. In consideration of the compression set and the environmental resistance, the connection operation with a low compression load is extremely easy for the elastic body within the above range. When the elastic body is provided in the small hole of the electrically insulating plate as the connector member, the elastic body is securely inserted and held in the small hole. That is, when the elastic body is inserted into the small hole of the plate, the elastic body is deformed and easily inserted into the small hole, and after the insertion, the elastic body returns to its original state, so that the elastic body fits into the small hole. Also, it is possible to prevent detachment without using a method such as an adhesive or caulking. For this reason, the outer dimension of the elastic body is 0.0
It is desirable to form the film large in the range of 5 to 0.2 mm.

The elastic body is preferably an electrically insulating elastomer, particularly a material which forms a crosslinked structure after curing.
Examples thereof include silicone rubber, polybutadiene rubber, natural rubber, polyisoprene rubber, urethane rubber, chloroprene rubber, polyester rubber, styrene / butadiene copolymer rubber, epichlorohydrin rubber, and foamed materials thereof. Silicone rubber and silicone foam rubber, which are excellent in heat resistance, compression set, etc., in addition to electrical insulation of the cured product, are most preferred.

The conductive wire has flexibility.
Or, causing a bend, along with the deformation of the elastic body, as long as it can expand and contract in the thickness direction of the plate, may have any characteristics, shape, or a simple straight wire may be bent during deformation, It may be bent. However, the conductive wire is formed into a coil shape or a ninety-nine folded shape in order to be able to favorably move in accordance with the elastic deformation of the elastic body in the elastic body and to maintain the elasticity itself. It is desirable to be done. If the conductive wire is buried in the elastic body in such a shape, the elastic wire easily exhibits elasticity according to the elastic deformation of the elastic body.
Therefore, the elastic body and the conductive wire can generate a sufficient elastic action at a low compression and a low load, and can maintain the action.

Examples of the conductive wire include fine metal wires such as phosphor bronze, copper, stainless steel, and bery copper, or gold-plated metal wires.
It is not necessary to limit to these. The conductive wire has a diameter of 3
0-100 μm range, more preferably 30-70 μm
Good range. With such a diameter, elasticity and elasticity can be sufficiently generated. In particular, when the conductive wire is formed in a coil shape or a 99-fold shape, if the diameter is within the above range, the cost of the conductor can be suppressed, while the elastic action is sufficiently generated, so that the electrical connector Low weight connections are easily achieved.

In the present invention, an electrical connector that is as thin as possible is preferable in order to minimize the influence of external noise. On the other hand, the conductive wire needs to maintain elasticity and elasticity within a certain length. For this reason, as the dimensions of the conductive wire, the length is in the range of 1.0 to 3.0 mm, particularly 1.0 to 1.5 mm.
Is preferred. If the length of the conductive wire does not satisfy the above range, it is impossible to sufficiently impart elasticity and elasticity to the conductive wire. If the conductive length exceeds the above range, the thickness of the electrical connector also increases, so that the electrical connector is easily affected by external noise. When the conductive wire has a coil shape, the coil diameter is 0.2 to 1.0.
The range of 0.3 to 0.8 mm is desirable because the electrode pitch has recently been reduced. If the coil diameter is within the above range, the conductive wire can exhibit a sufficient elasticity at low compression and low load.

The number of contact portions or connector members on the plate of the electric connector according to the present invention is LS.
I, the inspection circuit board, or the connection of the liquid crystal module (the ITO electrode of the liquid crystal module or TAB, COF electrode) is provided with the same number as the number of electrodes. In the case of microphones and speakers for mobile phones, if the electrodes are plate-shaped and two,
It is sufficient to provide two connectors or the like. When the electrodes are a center electrode and a donut-shaped electrode, three to four parts are provided at the center and the donut-shaped part.
It is sufficient to provide about pieces at equal intervals. Further, in the case of this mobile phone, the condenser microphone may be inserted into a rubber insulating holder and an electric connector may be incorporated on the electrode side of the condenser microphone, but the holder and the electric connector may be incorporated as separate pieces. Further, the holder and the electrical connector may be integrally molded.

Next, a method for manufacturing the electrical connector according to the present invention will be described. The electrical insulating plate of the electrical connector according to the present invention is formed in a predetermined shape and the above-described thickness range. When the electrically insulating plate is made of resin, it is desirable to mold the plate by injection molding. When a plurality of small holes are formed at predetermined positions of the electrically insulating plate, the small holes are formed during the injection molding of the plate. It may be formed after the injection molding. The small hole is formed so as to be smaller than the outer diameter of the elastic body by about 0.05 to 0.2 mm, and the elastic body is prevented from falling out of the small hole by making the plate and the elastic body fit each other. it can.

On the other hand, a long conductive wire is continuously coated with the elastic body at a predetermined interval, and the elastic body is formed in accordance with the shape of the small hole. In the long conductive wire, for example, as shown in FIG. 2, a straight connection portion is formed with a coil portion having an equal pitch of 50 μm. Such an elongated conductive wire is covered with the above-mentioned elastic body. As shown in FIG. 3, at a straight connecting portion, a space of 1 to 3 mm, preferably 1 to 2 mm is provided at intervals. A continuous conductor member or a continuous connector member can be formed so as not to be covered with the elastic body. If the length of the uncovered portion is less than the above range, not only the subsequent cutting step becomes difficult, but also a spherical portion in the contact portion described later may be formed small. On the other hand, if the length of the non-coated portion exceeds the above range, it takes time to form a spherical portion or the like in the cutting step, and the spherical portion may be too large. The number of connector members in such a continuous conductor member (continuous connector member) is 5 to 30, especially 5 to 20.
It is desirable that the number be within the range. Within the above range,
The moldability and handleability of the insulating elastomer as the elastic body can be sufficiently expected.

In the present invention, when the conductive wire is formed into a coil shape, for example, as shown in FIG. 2, a long conductive wire may be provided with a cylindrical coil portion at an equal pitch (50 μm). desirable. Although not shown, for example,
Both end portions in the elastic body are in close contact (dense pitch coil portion), and the center portion is at equal pitch intervals. Or
Conversely, the central portion is in a close state, and both end portions are at equal pitch intervals. Further, various coils such as a drum shape at an equal pitch interval or a drum shape having a central portion in close contact can be formed. Therefore, connecting electrode shape, compression load,
The coil shape of the conductive wire can be determined as appropriate according to the amount of compression. In this way, a long conductive wire is provided with a coil shape and a connecting portion, and a continuous conductive member can be formed by a general spring forming method.

Next, a plurality of connector members are formed by irradiating the non-embedded portion of the conductive wire, which is not covered with the elastic body, by laser irradiation and cutting. When cutting the continuous conductor member, laser irradiation or the like can be used, and the contact portion (cut end) of the wire can be immediately formed into a substantially spherical shape. If the contact point is spherical, surface connection becomes possible,
Stability at the time of connection of the electrical connector is improved. Next, the connector member is inserted into the small hole. As described above, the small hole is formed so as to be smaller than the outer diameter of the elastic body by about 0.05 to 0.2 mm, and the elastic body comes out of the small hole as a fit relationship between the plate and the elastic body. Can be prevented.

The electrical connector according to the present invention manufactured as described above has an elastic body which exerts an elastic action upon compression and a conductive wire having an elastic property, particularly a conductive wire which also has a coil-shaped elastic action. Since the insulating elastomer is used and has substantially spherical contact portions on both end surfaces of the insulating elastomer, the circuit board and the electrical connector itself are not distorted, and the electrode portions and the contact portions are not scratched and corroded. . Furthermore, stable connection can be easily performed with low weight and low compression at the contact portion, and connection can be easily performed without being affected by the shape of the electrode to be connected. Also, in connection with the electrical connector, there is no quality defect such as distortion or damage of the LSI or the electronic circuit board, etc., and functionally stable connection and incorporation become possible, thereby reducing defects and cost during the incorporation. In addition, quality and reliability in actual use are improved. Further, according to the method for manufacturing an electrical connector according to the present invention, it is possible to accurately provide a connector portion only at a portion to be connected without being affected by an LSI, a shape of an electrode to be connected, and a pitch between the electrodes. Since it can handle lot production, it is advantageous in terms of manufacturing cost.

[0027]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Incidentally, the electrical connector according to the present invention,
The present invention is not limited to the following embodiments. 1A and 1B are a cross-sectional view and a perspective view of an electrical connector according to the present embodiment. FIG. 2 is a partial plan view of a long conductive wire used for the electrical connector according to the present embodiment. FIG.
(A) thru | or (c) are schematic diagrams which show the manufacturing process of the electrical connector which concerns on a present Example. FIG. 4 is a partial cross-sectional view illustrating an example of a connection state of the electrical connector according to the present embodiment.
FIG. 5 is a partial cross-sectional view illustrating another example of the connection state of the electrical connector according to the present embodiment. FIG. 6 is a partial cross-sectional view of a microphone in which the electrical connector according to the present embodiment is used.

Example 1 As shown in FIGS. 1A and 1B, a plate 12 made of polyphenylene sulfide having a length and width of 20 mm and a thickness of 1.0 mm was formed by injection molding. The plate 12 has a matrix having a diameter of 0.75 in a matrix of 20 rows each in the vertical and horizontal directions (a total of 400 pieces) at a 1.0 mm pitch.
1 mm, and two positioning holes 16 (1.5 mm in diameter) were formed at the corners of the plate 12 in the thickness direction (in FIG. 1, the small holes were enlarged. , The number of small holes is omitted unlike the real number.)

As shown in FIG. 2, a coil spring portion 20 having a diameter of 0.5 mm, a pitch of 50 μm, and a length of 1.0 mm is intermittently formed using a long conductive wire 18 having a diameter of 30 μm plated with gold on phosphor bronze. And the straight connecting portion 22 as a non-coil portion was formed to 2.0 mm. Ten coil spring portions 20 were formed on the long conductive wire 18. As shown in FIGS. 3 (a) to 3 (c), the long conductive wire 18 is set in the lower mold 23, and an insulating silicone rubber (trade name: silicone compound KE- manufactured by Shin-Etsu Chemical Co., Ltd.) is used as the elastic body 24. 931U) was filled only into the coil spring portion 20, and the upper mold 26 was set and vulcanized. The elastic body 24 as a molded part was made of silicone rubber to have a diameter of 0.8 mm, and the connecting part 22 was not covered with the silicone rubber and was in a wire state.

The connecting portion 22 of the continuous conductor member (continuous connector member) coated with silicone rubber is cut by irradiating it with a carbon dioxide gas laser, and a hemispherical contact portion 28 having a size of 0.2 mm is formed. The obtained connector member 30 was obtained. The connector member 30 is inserted into the small hole 14 of the plate 12, and all are inserted so that the surface of the plate and the surface of the elastic body are the same.
An electrical connector 10 projecting 2 mm was obtained (FIG. 4). The electrical connector 10 is provided on the plate 12 by the rubber property of the elastic body 24.
The elastic body 24 did not fall off. The positioning hole 16 of the electrical connector 10 is inserted into a positioning pin (not shown) provided on the electronic circuit board 30, and as shown in FIG. 28 is connected. An LG having 400 electrodes 34 so as to be connected to the other contact portion 28 on the electrical connector 10
A36 was loaded. In this state alone, the LGA 36 and the electronic circuit board 31 are in a conductive state. However, in order to ensure a stable conductive state, the LGA 36 is compressed by 0.3 mm (approximately 500 g under load), and the conductive resistance is also stable. However, stable conduction was maintained even when vibration was applied.

Example 2 An ABS plate 42 having a length of 30 mm, a width of 5 mm and a thickness of 1.0 mm was formed by injection molding (FIG. 5). Twenty small holes having a diameter of 0.75 mm and two positioning holes (1.5 mm in diameter) were formed in the plate in the vertical direction at a pitch of 1.0 mm in the thickness direction at the corners of the plate. Using a long conductive wire made of phosphor bronze plated with gold and having a diameter of 30 μm, a coil spring part having a diameter of 0.5 mm, a pitch of 50 μm and a length of 1.0 mm and a connecting part of 2 mm were connected and 20 coil spring parts were connected. A conductor member was obtained. This continuous isoelectric member is set in a lower mold, and an insulating silicone rubber (trade name: Silicone Compound KE-931U manufactured by Shin-Etsu Chemical Co., Ltd.) is filled only in the coil spring portion as an elastic body, and then the upper mold is set. Vulcanized and molded. The elastic body and the coil spring portion of the molded product had a diameter of 0.8 mm with silicone rubber, and the connecting portion was not molded with silicone rubber, and was in a wire state.

The connecting portion of the continuous conductor formed of the silicone rubber was irradiated with a carbon dioxide gas laser and cut to obtain a connector member having a hemispherical contact portion having a size of 0.2 mm. Connect this connector member 44 to the plate
42, and all were inserted so that the plate surface and the surface of the elastic body were the same, to obtain an electrical connector in which the contact portions 46 protruded 0.2 mm from both end surfaces of the elastic body. In the electric connector 40, the elastic body did not fall off the plate due to the rubber characteristic of the elastic body. This electrical connector 40
Is inserted into a positioning pin (not shown) provided on the electronic circuit board 48, and as shown in FIG. The liquid crystal module 52 was mounted so as to be connected to the contact portion 46 of FIG. In this state alone, the liquid crystal module 52 and the electronic circuit board
The liquid crystal module 52 is compressed by 0.3 mm (approximately 500 g by weight) in order to ensure a stable conductive state, but the conductive resistance is stable and even when vibration is applied. Stable conduction was maintained.

<Embodiment 3> Diameter 6 mm, thickness 1.0 mm
Was made by injection molding (FIG. 6). This plate 62 has one small hole having a diameter of 1.0 mm at the center and a small hole having a diameter of
Four small holes of mm were formed in the thickness direction at intervals of 90 degrees. Using a long conductive wire with a diameter of 50 μm plated with gold on phosphor bronze, a coil spring part with a diameter of 0.6 mm, a pitch of 50 μm, a length of 1.0 mm and a straight connection part of 2 mm, and ten coil spring parts The continuous conductive member obtained as a continuous conductive member was set in a lower mold, and an insulating silicone rubber (trade name: Silicone Compound KE-931 manufactured by Shin-Etsu Chemical Co., Ltd.) was used as an elastic body.
After U) was filled only in the coil spring portion, the upper mold was set and vulcanized. The elastic body and the coil spring portion of the molded product had a diameter of 0.8 mm made of silicone rubber, and the connecting portion was not molded with silicone rubber, and was in a wire state. The connecting portion of the continuous conductor member formed of silicone rubber was cut by irradiating it with a carbon dioxide gas laser, and a connector member 64 having a hemispherical contact portion having a size of 0.2 mm was obtained. Connect this connector member 64 to the plate 62
Then, all were inserted so that the surface of the plate and the surface of the elastic body were the same to obtain an electrical connector 60 in which the contact portions 66 protruded 0.2 mm from both end surfaces of the elastic body. In the electric connector 60, the elastic body did not fall off the plate 62 due to the rubber property of the elastic body, and the conductive wire did not fall off the elastic body.

The electric connector 60 is connected to an electrode 84 of a condenser microphone 82 (φ1 mm at the center, diameter: 1 mm) in a holder 68 made of insulating silicone rubber (a portable condenser microphone is inserted in this holder). The electrical connector 60 was mounted on the side of the condenser microphone electrode 84 having a width of 1 mm on the circumference of 3.5 mm and connected to the electrode 88 of the electronic circuit board 86. In order to ensure a stable conduction state, this holder 68 was incorporated into the microphone insertion portion of the mobile phone, and was compressed and fixed (approximately 500 g by weight) with a circuit board 86 by 0.3 mm. Even when vibration was applied, stable conduction was maintained, and no howling echo occurred.

[0035]

According to the electrical connector of the present invention, the electrically insulating plate has an elastic body which can be elastically deformed in the thickness direction of the plate, and the conductive wire is embedded in the elastic body. Since it can expand and contract in accordance with the deformation of the elastic body, it may distort circuit components such as packages, electronic circuit boards, and liquid crystal modules, or damage its components when connecting to terminal electrodes on electronic circuit boards. In addition, the pressure operation between the substrates or the like can be made extremely low in weight, and the connection can be made reliable.

[Brief description of the drawings]

FIGS. 1A and 1B are a cross-sectional view and a perspective view of an electrical connector according to an embodiment.

FIG. 2 is a partial plan view of a long conductive wire used for the electrical connector according to the present embodiment.

FIGS. 3A to 3C are schematic views showing a manufacturing process of the electrical connector according to the embodiment.

FIG. 4 is a partial cross-sectional view illustrating an example of a connection state of the electrical connector according to the embodiment.

FIG. 5 is a partial cross-sectional view showing another example of the connection state of the electrical connector according to the embodiment.

FIG. 6 is a partial cross-sectional view of a microphone in which the electrical connector according to the embodiment is used.

FIG. 7 is a partial cross-sectional view of a conventional electrical connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric connector 12 Resin plate 14 Small hole 18 Long conductive wire 20 Coil part 22 Continuous part 28 Contact part 30 Connector member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H01R 13/24 H01R 13/24 12/16 33/76 A 33/76 43/00 H 43/00 23 / 68 303E F-term (reference) 2G003 AA07 AG01 AG12 2G011 AA03 AA16 AB01 AB06 AB08 AC14 AE01 AE03 AF07 5E023 AA04 AA16 AA18 AA22 BB18 BB22 BB29 CC02 CC22 CC26 DD26 EE18 FF07 GG01 H05H05H05 H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05H05E05

Claims (3)

[Claims] 1. An electrical connector comprising: an electrically insulating plate; and a plurality of conductive wires penetrating in a thickness direction of the plate, wherein both ends of the conductive wire serve as contact portions. An electrical connector, wherein the plate has an elastic body elastically deformable in a thickness direction of the plate, and the conductive wire is embedded in the elastic body and expands and contracts in accordance with the deformation of the elastic body. 2. The electric insulating plate comprises a resin plate having a plurality of small holes penetrating in the thickness direction of the plate and having the elastic body disposed in the small holes. It is formed in a substantially spherical shape, and the conductive wire is embedded in the elastic body to form a connector member made of the elastic body and the wire, and the connector member is inserted and held in the small hole. Claim 1
Electrical connector as described. 3. The method for manufacturing an electrical connector according to claim 1, wherein a plurality of small holes are formed in the electrically insulating plate, and the plurality of small holes are continuously formed at a constant interval in a long conductive wire. Along with covering the elastic body, the elastic body is formed in accordance with the shape of the small hole, and a plurality of connector members are cut by irradiating the non-embedded portion of the conductive wire that is not covered with the elastic body by laser irradiation. Forming an electrical connector and inserting the connector member into the small hole.