JP2002141130A - Pressure welding holding type connector and its connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive pressure welding holding type connector and its connecting structure, capable of simplifying connecting work, ensuring electrical connection at a low load, and shortening a conducting passage by lowering the height. SOLUTION: A holder 20 is interposed between an electronic circuit board 1 and an electroacoustic component 10, the holder 20 is formed in a cylinder with bottom, and a probe 30 is installed on the bottom of the holder 20. The probe 30 is composed of an insulating housing 31 integrally formed on the bottom of the holder 20, conducting toe pins 36 are inserted into a plurality of through holes 32 of the housing 31 from the back face in the bottom of the holder 20, a conduction probe 37 slidably passed from the bottom surface of the holder 20 in each through hole 32 and fit to the conducting toe pin 36, and a coil spring 38 inserted into each through hole 32, supported at the opening end of the conducting toe pin 36, and compression-energizing the conducting probe 37 in the bottom surface direction of the holder 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-clamp type connector incorporated in a main body case of a portable telephone, a portable information terminal or the like, and a connection structure thereof.

[0002]

2. Description of the Related Art Although not shown, a conventional mobile phone or the like has a small electroacoustic component (microphone, speaker, etc.) fitted in a mounting opening of a main body case, and a plurality of electrodes of the electroacoustic component and an electronic circuit board. Are soldered via wires.

[0003]

As described above, conventional mobile phones and the like merely solder the electro-acoustic components, which need to be separately fixed, to the electronic circuit board with wires, so that a high load is imposed on the electrical connection. In addition, there is a major problem that the connection of the electroacoustic component may become unstable due to tilting of the electroacoustic component. In addition, since the soldering is simply performed, process control of the work is indispensable, and the manufacturing cost cannot be reduced. Furthermore, in recent years, as mobile phones and the like have become thinner, lighter, and smaller, it is necessary to reduce the height of the connection part. However, it is very difficult to reduce the height without trouble. Therefore, it is also difficult to shorten the conduction path.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and simplifies a connection operation, can obtain a reliable electric connection with a low load, and reduces a height dimension to shorten a conduction path. It is an object of the present invention to provide an inexpensive press-clamp-type connector and a connection structure thereof.

[0005]

According to the first aspect of the present invention, in order to achieve the above object, an insulating holder is formed in a substantially cylindrical shape with a bottom, and a probe is provided at the bottom of the holder. A substantially cap-shaped conductive toe pin fitted into each of a plurality of through holes of a housing provided in a thickness direction of the bottom of the holder from a bottom side of the holder, and an opening side of the holder in each through hole. A conductive probe fitted slidably from and fitted with the conductive toe pin, and fitted into each through hole to contact an open end of the conductive toe pin and penetrated by the conductive probe,
The conductive probe is constituted by a spring biasing the opening side of the holder, the closed bottom of the conductive toe pin is exposed, and the conductive probe is protruded toward the opening side of the holder by the biasing force of the spring. It is characterized by:

It is preferable to provide a dummy probe at the bottom of the holder. Further, the conductive toe pin can be slidably fitted in the through hole, and the conductive toe pin can be protruded toward the bottom of the holder by the biasing force of the spring. In the invention according to claim 4, in order to achieve the above object, between the opposed electrodes,
According to another aspect of the present invention, electrical continuity is achieved with the press-connecting connector according to claim 1 interposed therebetween.

Here, the number of probes in the scope of claims is preferably 2 to 5, preferably 2 to 3, in terms of cost, but can be increased or decreased as necessary. In this regard, the same applies to the dummy probe. The end of the conductive probe is pointed at a predetermined angle, semicircular in cross section,
It can be appropriately formed in a semi-elliptical cross section, a semi-oval cross section, a plurality of pins, a crown, a substantially dowel stud, or the like. In particular, if the end of the conductive probe is formed in a sharp shape such as a cone or a pyramid, it becomes possible to break the oxide film of the solder of the electrode and obtain good conduction. The holder accommodates the electrical joint, and the electrical joint includes at least various microphones (for example, condenser microphones) of communication devices and information terminal devices, and electroacoustic components such as speakers. The electrical joint having electrodes includes at least various circuit boards and test circuit boards.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1 to FIG. And an insulating holder 20 for accommodating an electro-acoustic component interposed between the electro-acoustic component 10 and a probe 30 and a plurality of dummy probes 40 are provided at the bottom of the holder 20 and these are substantially arranged. Same size
The height is set such that the probe 30 and the plurality of dummy probes 40 support the electroacoustic component 10.

As shown in FIG. 1, the electronic circuit board 1 is formed of, for example, a flat printed wiring board, and a plurality of electrodes 2 are arranged on the surface in a flat manner. In addition, the electroacoustic component 10
As shown in FIG. 1 and FIG. 3, a small microphone such as a mobile phone, for example, is formed. A circular electrode 11 is formed in the center of the bottom surface, and a donut electrode 12 surrounding the circular electrode 11 is formed in the remaining bottom surface. Have been.

The holder 20 is, as shown in FIGS. 1 and 2,
It is formed into a cylindrical shape with a bottom having a substantially U-shaped cross section and a substantially concave shape by using a predetermined insulating elastomer, and a main body case 2 for a mobile phone or the like.
The anti-vibration function and howling prevention function are exhibited by being fitted into the first mounting opening 22. Specific examples of the material of the holder 20 having elasticity include natural rubber, polyisoprene, polybutadiene, chloroprene rubber, polyurethane rubber, and silicone rubber. Among these,
Considering weather resistance, compression strain characteristics, workability, and the like, silicone rubber is the most suitable material.

The bottom of the holder 20 may or may not be formed of the insulating elastomer. For example, the bottom of the holder 20 can be separately formed of a predetermined plastic resin. Specific examples of the material in this case include ABS resin, polycarbonate, polypropylene, polyvinyl chloride, polyethylene, and the like.
BS resin is most suitable. Further, a flange 23 protrudes radially inward from the inner peripheral edge of the upper surface of the opening of the holder 20, and the flange 23 effectively prevents the electroacoustic component 10 from falling off.

As shown in FIGS. 1, 2 and 4, the probe 30 has an insulating housing 31 integrally formed on the bottom of the holder 20 and a plurality of holes formed in the housing 31 in the vertical direction. A through hole 32, a cap-shaped conductive toe pin 36 fitted and fixed in each through hole 32 from the bottom rear surface of the holder 20, and a conductive toe pin 36 slidably fitted in each through hole 32 from the bottom surface of the holder 20. And a conductive probe 37 fitted in each of the through-holes 32 and supported in contact with the upper end of the opening of the conductive toe pin 36, penetrated by the conductive probe 37, and at least the upper end of the conductive probe 37 at the bottom of the holder 20. And a coil spring 38 that urges against the surface.

As shown in FIGS. 1, 2 and 4, the housing 31 is formed into a thin single-layer or multi-layer flat rectangular / plate shape using a predetermined material, and has a small diameter through hole in the longitudinal direction. 32 is a predetermined pitch (for example, 0.5 mm to 1.27
mm). The elongated housing 31 is made of a general-purpose engineering plastic (for example, ABS) having excellent heat resistance, dimensional stability, moldability, and the like.
Resin, polycarbonate, polypropylene, PVC, polyethylene, etc.). Among these materials, the ABS resin is most suitable as the material in consideration of workability, cost, and the like.

As shown in FIG. 4, each through hole 32 has a vertically long fitting hole 33 which is located on the electronic circuit board 1 side and is closely fitted to the conductive toe pin 36, and has an upper end portion of the fitting hole 33. A partition hole 34 formed to form a space between the upper end of the opening of the conductive toe pin 36 and a reduced diameter hole 35 formed at the upper end of the partition hole 34 via a step and located on the electroacoustic component 10 side.
And are formed integrally and continuously.

As shown in the drawing, each conductive toe pin 36 is formed in a bottomed cylindrical shape having a substantially U-shaped cross section using, for example, a gold-plated conductive material, for example, copper, brass, or aluminum. The conductive toe pin 36 has a flat closed lower surface slightly protruding from the lower surface of the housing 31 (a protruding amount is 0.1 to 0.3 mm, preferably 0.1 to 0.2 m).
m), and the closed lower surface contacts the electrode 2 of the electronic circuit board 1 or a solder layer made of cream solder or an ACF (anisotropic)
It is appropriately fixed via a conductive film (anisotropic conductive film) or the like to ensure conduction.

As shown in FIG. 4, each of the conductive probes 37 is made of a pin made of, for example, gold-plated conductive copper, brass, aluminum, conductive elastomer, or the like. The conductive probe 37 has an upper portion formed in a small diameter with a small diameter, and an upper end portion formed in a conical shape with a large diameter in a large diameter, and the upper end portion is formed in a circular electrode 11 or a donut electrode 12 of the electroacoustic component 10. Contact

Each coil spring 38 has, for example, a diameter of 3
A predetermined thin metal wire having a diameter of 0 to 100 μm, preferably 30 to 80 μm is formed by being wound at an equal pitch of, for example, 50 μm.
g to generate a load of 60 g. The diameter of the thin metal wire is 30 ~
The reason why the thickness is set to 80 μm is that if this value range is selected, low cost and low load connection can be easily realized. As the thin metal wire forming each coil spring 38, a metal wire such as phosphor bronze, copper, stainless steel, beryllium copper, piano wire, or a thin metal wire obtained by plating these metal wires with gold is used.

The length of each coil spring 38 is as follows:
For example, 0.5 to 3.0 mm, preferably 1.0 to 1.5
mm is good, and about half the length is preferably exposed from the surface of the housing 31. With such a range, adverse effects due to external noise can be avoided and elastic characteristics can be maintained. The lower end, which is one end of each coil spring 38, is, as shown in FIG.
6 is formed to have an enlarged diameter in contact with the upper end of the opening, and the through hole 32 is formed.
And tightly fits into the partitioning hole 34 to effectively control the dropout or displacement.

As shown in the figure, the upper end of each coil spring 38 is formed to have a small diameter that fits with the conductive probe 37, and fits into the groove-shaped reduced upper part of the conductive probe 37. Drops and dropouts are very effectively prevented. The diameter of the upper end of each coil spring 38 is smaller than the diameters of the lower end, the lower part, the center, and the upper part. In particular,
In consideration of the recent pitch reduction of the electrode, the diameter is reduced by about 0.05 to 0.2 mm from the diameter of the central part. this is,
The diameter of the upper end portion of each coil spring 38 is the conductive probe 3
If the diameter is the same as that of the upper part 7, the conductive probe 37 may not smoothly fit into the conductive toe pin 36. Also, if the clearance is large, the entire through hole 32 becomes large, and the function of preventing the coil spring 38 from coming off is reduced.

Further, the plurality of dummy probes 40
As shown in FIG. 2, it is formed into a pin shape using the same material as the holder 20. Each dummy probe 40 is integrated with the bottom of the holder 20, and the upper end contacts the donut electrode 12.

In the above configuration, the electroacoustic component 10 is fitted and stored in the holder 20 from the opening side, and the upper ends of the conductive probe 37 and the dummy probe 40 are brought into contact with the circular electrode 11 and the donut electrode 12, respectively. The holder 20 is fitted into the mounting opening 22 of the plurality of conductive toe pins 3.
When the lower end of the electronic component 6 is directly press-contacted to the electrode 2 of the electronic circuit board 1 or fixedly connected by an ACF or the like, the electroacoustic component 10 is appropriately and easily incorporated into a main body case of a mobile phone or the like, and the electric circuit board 1 is electrically connected to the electronic circuit board 1. Conduction with the acoustic component 10 can be ensured (see FIG. 1).

According to the above configuration, the probe 30 is interposed between the electronic circuit board 1 and the electroacoustic component 10 via the holder 20 and the housing 31, so that the probe 30 can be easily incorporated or mounted. In addition, the positioning accuracy and the assemblability can be significantly improved.
In addition, since the conductive probe 37 and the coil spring 38 are integrated and the conductive probe 37 is reciprocally fitted into the recess of the conductive toe pin 36, the height dimension can be reduced without any problem (about 1.50 mm to 2.00 mm). And low resistance, low load connections (e.g., 30-60 g / pin) are also highly promising.

In this regard, since the conductive toe pin 36 and the conductive probe 37 are always in direct contact with each other on the peripheral surface to form the shortest conductive path, only the long coil spring 38 wound spirally is used as the conductive path. Unlike this, it is possible to realize a remarkable reduction in inductance, that is, high-frequency characteristics by shortening the conduction path, and also to shorten the entire length of the conductive probe 37. Further, a conductive toe pin 36 having excellent stability and mountability is fitted and closed in each through hole 32, and the conductive probe 37 is closed by the circular electrode 1 of the electroacoustic component 10.
Since it is in contact with the first or donut electrode 12, stable conduction can be greatly expected. Further, if the upper end of the conductive probe 37 is substantially hemispherical or semi-elliptical, the stability of conduction can be ensured even if the coil spring 38 is slightly inclined forward, backward, left and right.

Since the lower end of the coil spring 38 is sandwiched between the partitioning hole 34 and the conductive toe pin 36, the coil spring 38 can be prevented from coming off with a simple configuration. Furthermore, since the coil spring 38 has a three-stage shape with a partially different diameter, even if the conductive probe 37 protrudes from the housing 31, there is no adverse effect due to external force from the lateral direction. Furthermore, a small probe 3
Since the position of the electroacoustic component 10 is properly held by the dummy probe 40 and 0, the inclination of the electroacoustic component 10 can be extremely effectively suppressed and prevented with a simple configuration.

Next, FIG. 5 shows a second embodiment of the present invention. In this case, the numbers and arrangements of the conductive probes 37 and the dummy probes 40 of the probe 30 are changed as shown in FIG. I have to. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted.

FIG. 6 shows a third embodiment of the present invention. In this case, the housing 31 has a multi-layer structure, and the lower end of a fitting hole 33 forming each through hole 32 is formed. Each conductive toe pin 36 is slidably fitted into the through-hole 32 from below.
The upper end of the coil spring 38 is formed in a curved shape in a semicircular shape with an enlarged diameter, and the lower end of each coil spring 38 is formed with an enlarged diameter so as to be loosely fitted in the partition hole 34 of the through hole 32.

The lower end face of each conductive toe pin 36 is formed in a curved shape having a substantially semicircular cross section. The upper outer peripheral surface of the conductive toe pin 36 is formed to have an enlarged diameter, and functions so as to be engaged with the fitting hole 33 and the step portion of the reduced diameter portion so as not to fall off. Such a conductive toe pin 36 is not fixed but protrudes downward and upward from the housing 31 of the holder 20 by the elastic force of the coil spring 38. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted.

Next, FIG. 7 shows a fourth embodiment of the present invention. In this case, the locking flange 41 is projected radially outward from the upper peripheral surface of each conductive probe 37, and each conductive probe 37 The upper end of the probe 37 is formed in a semicircular cross-section without forming an enlarged diameter, and the lower end and the center of each coil spring 38 are loosely fitted into the elongated partition hole 34.
The upper end of each coil spring 38 is formed in a substantially cylindrical shape without being formed in a reduced diameter, and is fitted and abutted on the locking flange 41 of the conductive probe 37 and the upper outer peripheral surface of the conductive toe pin 36. Locking flange 4 of conductive probe 37
1 functions so as to be locked in the step portion between the partitioning hole 34 and the reduced diameter hole 35 so as not to come off or come off. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted.

Next, FIG. 8 shows a fifth embodiment of the present invention. In this case, the housing 31 has a multi-layer structure, and the lower end of a fitting hole 33 forming each through hole 32 is provided. Each of the conductive toe pins 36 is slidably fitted into the through-hole 32, and the upper end of each of the conductive probes 37 is formed in a sharply enlarged, substantially tooth-shaped smooth dovetail shape to form the circular electrode 11 or the donut. An oxide film formed by, for example, solder plating of the electrode 12 can be destroyed, and the lower end of each coil spring 38 is formed to have an enlarged diameter so that it can fit loosely into the partition hole 34 of the through hole 32. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted.

In the above embodiment, the housing 31 having the through hole 32 is integrated with the bottom of the holder 20.
However, the present invention is not limited to this. For example, as shown in FIG.
A plurality of through holes 32 may be provided directly on the bottom. The housing 31 may be rectangular, but may be square, circular, oval, oval, or the like. Further, the first, second, third,
The fourth and fifth embodiments can be appropriately changed or combined.

[0031]

As described above, according to the present invention, there is an effect that the connection operation can be simplified and a reliable electric connection can be obtained with a low load. In addition, it is possible to shorten the conduction path by reducing the height dimension.

[Brief description of the drawings]

FIG. 1 is an overall sectional view showing an embodiment of a connection structure of a press-clamping connector according to the present invention.

FIG. 2 is a bottom view showing the embodiment of the press-contact and pinch type connector according to the present invention.

FIG. 3 is a perspective view showing an electroacoustic component in the embodiment of the press-connecting connector according to the present invention.

FIG. 4 is an explanatory cross-sectional view of a main part showing an embodiment of the press-contact pinching connector according to the present invention.

FIG. 5 is a bottom view showing a second embodiment of the press-contact pinching connector according to the present invention.

FIG. 6 is an explanatory sectional view showing a third embodiment of the press-contact and pinch type connector according to the present invention.

FIG. 7 is an explanatory sectional view showing a fourth embodiment of the press-contact and pinch type connector according to the present invention.

FIG. 8 is an explanatory sectional view showing a fifth embodiment of the press-contact and pinch type connector according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic circuit board 2 Electrode 10 Electroacoustic component 11 Circular electrode (electrode) 12 Donut electrode (electrode) 20 Holder 30 Probe 31 Housing 32 Through-hole 36 Conductive topin 37 Conductive probe 38 Coil spring (spring) 40 Dummy probe

Claims (4)

[Claims] 1. An insulating holder is formed in a substantially cylindrical shape with a bottom.
A pressure-contacting / clamping type connector in which a probe is provided at the bottom of the holder, wherein the probe has a substantially cap shape which is fitted from a bottom side of the holder to a plurality of through holes of a housing provided in a thickness direction of the bottom of the holder. A conductive probe that is slidably fitted into each through-hole from the opening side of the holder and fits with the conductive toe pin; and a conductive probe that is fitted into each through-hole and contacts the open end of the conductive toe pin. A spring penetrating the conductive probe and biasing the conductive probe toward the opening of the holder, exposing a closed bottom portion of the conductive toe pin, and pressing the conductive probe with the biasing force of the spring. A press-clamp type connector characterized in that it protrudes toward the opening side of the holder. 2. The press-clamping connector according to claim 1, wherein a dummy probe is provided at the bottom of the holder. 3. The press-clamping connector according to claim 1, wherein the conductive toe pin is slidably fitted in the through hole, and the conductive toe pin is projected to the bottom side of the holder by the urging force of the spring. . 4. The method according to claim 1, wherein the electrodes are opposed to each other.
A connection structure for a press-clamp type connector, wherein the connection is made by interposing the press-clamp type connector described above.