JP2002100431A - Pressure contact connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure contact connector with reduced height and capable of improving positioning accuracy and assemblability and connectable with low load. SOLUTION: An insulating housing 20 is interposed between a flat electronic circuit board 1 and an electrically connected object 10, conductive spring elements 26 are fitted into plural through-holes 21 thereof, the diameter from the lower end part of one end part to the central part of each of the spring elements 26 is set larger than that of the upper end part of the other end part, and the central part through the upper end part of the spring element 26 is projected from the surface of the housing 20. A cap 27 is fitted to the lower end part of each spring element 26, a plug 28 is fitted to and supported by the upper end part of each spring element 26, and each cap 27, and each plug 28 are brought into contact with an electrode 2 of the electronic circuit board 1 and an electrode 11 of the electrically connected object 10, respectively. Since the pressure contact holding type connector is interposed between the electronic circuit board 1 and the electrically connected object 10 via the housings 20, the connector can be built in or mounted to the electronic circuit board 1 itself, and the positioning accuracy and ease of assembly can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic circuit board and a liquid crystal module, an electronic circuit board and an electronic circuit board, and various ICs.
The present invention relates to a press-clamping connector used for electrical connection between a package and an electronic circuit board, and between an electronic circuit board and a microphone or speaker for a mobile phone.

[0002]

2. Description of the Related Art Conventionally, when electrically connecting an electronic circuit board for a cellular phone to a liquid crystal module, although not shown, a curved elastic elastomer having a substantially semi-oval cross section or a substantially U-shaped cross section is used. A press-clamping connector having a plurality of thin metal wires arranged in a row on the surface is used, or an electrical connector pin disclosed in Japanese Patent Application Laid-Open No. 7-161401 is used.

[0003]

However, the conventional press-clamp type connector and the connector pin for electrical connection are interposed between the electronic circuit board and the liquid crystal module without the holder, so that the electronic circuit board itself is not provided. Can not be mounted on positioning accuracy and assembly (assembl)
y) There is a lot of possibility that the property may be deteriorated. Furthermore, with the recent trend toward thinner, lighter, and smaller mobile phones, it is necessary to reduce the height of the press-clamp-type connector and the connector pin for electrical connection, but the height (currently about 5 mm) is required. It is very difficult to make it small without problems, and it is also difficult to make connections with low loads.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has as its object to provide a press-contact pinching type connector capable of improving positioning accuracy and assemblability, reducing a height dimension, and enabling connection with a low load. It is an object.

[0005]

According to the first aspect of the present invention, in order to achieve the above object, a plurality of through holes which are sandwiched between opposed electrodes and are oriented in a thickness direction. In each of the through holes of the insulating housing having a diameter of at least one end is formed larger than the diameter of the other end,
One end has a cap or a stopper, and the other end is fitted with a conductive spring element provided so as to protrude from the surface of the housing.

It is to be noted that, in place of the above-mentioned spring element in which at least one end has a diameter larger than the diameter of the other end, the diameters of one end and the other end are both smaller than the diameter of a central portion connecting them. Spring elements can be used. In addition, each of the through holes can be formed of a reduced diameter hole, a most reduced diameter hole, and a tapered hole connecting the reduced diameter hole and the most reduced diameter hole. Further, a cap or a stopper provided at one end of the spring element can be made to protrude from the housing.

[0007] Here, the electrical joint having electrodes in the claims includes various IC packages such as a liquid crystal module, a surface mount type (QFP, BGA, LGA, etc.), various circuit boards, mobile phones and electronic devices. Various electronic components such as a microphone and a speaker are included. The housing can be formed in a rectangle, square, polygon, ellipse, oval, and the like. The end of the plug may be curved, or may be bent and inclined in a substantially cross-sectional shape.

[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 FIGS. A conductive spring element 26 is inserted into each of the plurality of through-holes 21 with an insulating housing 20 interposed between the electrical joint 10 and the electrical joint 10. The diameter over the central portion is formed larger than the diameter of the upper end portion which is the other end portion, and the upper end portion of the spring element 26 from the central portion to the housing 20 is formed.
The cap 27 is fitted to the lower end of each spring element 26, and each spring element 2
A plug 28 is fitted and supported on the upper end of the electronic component 6, and each cap 27 is attached to the electrode 2 of the electronic circuit board 1, and each plug 28 is connected to the electrical joint 10.
, Respectively.

As shown in FIG. 1, the electronic circuit board 1 is made of, for example, a printed wiring board, and has a plurality of electrodes 2 arranged on the surface thereof in a flat manner. As shown in the figure, the electric joint 10 is formed of, for example, a liquid crystal module, and is closely opposed to the lower surface of the electronic circuit board 1. This electric conjugate 10
A plurality of electrodes 11 composed of ITO electrodes are arranged.

As shown in FIG. 1 and FIG. 2, the housing 20 is formed into a thin single-layer or multiple-layer planar rectangle using a predetermined material, and a small-diameter through-hole 21 is formed in a longitudinal direction at a predetermined pitch ( (For example, 0.5 mm to 1.27 mm). The elongated plate-shaped housing 20 is made of a general-purpose engineering plastic (for example, AB) having excellent heat resistance, dimensional stability, moldability, and the like.
S resin, polycarbonate, polypropylene, polyvinyl chloride, polyethylene, etc.). Among these materials, the ABS resin is most suitable in consideration of workability, cost, and the like. As shown in FIG.
The tapered large-diameter hole 22, the reduced-diameter hole 23, the tapered hole 24 located on the side of the electronic circuit board 1, and the smallest-diameter hole 25 located on the side of the electric joint 10 are formed integrally and continuously. The facilitation of the insertion of the stopper 28 is ensured, and the stopper 28 is prevented from coming off.

The plurality of spring elements 26 include an electronic circuit board 1, an inspection circuit board, a surface mount type IC package,
In the case of connection with a liquid crystal module (ITO, TAB, COF electrodes), the number is the same as the number of these electrodes. Each spring element 26 has a diameter of, for example, 30 as shown in FIG.
A thin metal wire having a diameter of about 100 μm, preferably 30 to 70 μm is wound at an equal pitch (for example, 50 μm) so as to be formed in an elastic coil shape having a substantially conical shape so as not to fall out of the through hole 21. I have. This spring element 26
May be metal wires such as phosphor bronze, copper, stainless steel, beryllium copper, piano wire, or thin metal wires obtained by plating these metal wires with gold. The reason why the diameter of the thin metal wire is set to 30 to 70 μm is that if this value range is selected, low cost and low load connection can be easily realized.

The length of each spring element 26 is, for example, 1.0 to 3.0 mm, preferably 1.0 to 1.8 m.
It is desirable that m is good and about half of the length is exposed from the surface of the housing 20. Within such a range, adverse effects due to external noise can be avoided and elastic characteristics can be maintained. The diameter of the ring-shaped upper end of each spring element 26 is formed smaller than the diameter of the center from the lower end. Specifically, in consideration of the recent pitch reduction of the electrode 11, the diameter of the lower end portion and the center portion is 0.5 to 0.8.
Times, about 0.6-0.8 times, more specifically 0.2-
It is formed to 0.4 mm, preferably about 0.3 to 0.4 mm.

As shown in FIGS. 2 and 3, each cap 27 is formed to have a substantially U-shaped cross section using, for example, a gold-plated conductive material, and a portion slightly protruding from the housing 20 (the amount of protrusion is 0.1-0.3 mm, preferably 0.1-0.3 mm.
(Approximately 1 to 0.2 mm) is in contact with the electrode 2 of the electronic circuit board 1 or is appropriately fixed to the electrode 2 of the electronic circuit board 1 via a solder layer made of cream solder or the like to ensure conduction. Further, as shown in the figure, each stopper 28 is basically formed in a substantially pin-like or substantially screw-like shape using, for example, gold-plated conductive brass or a conductive elastomer. The upper end surface of the enlarged diameter head that comes into contact with the electrode 11 is curved and formed in a semicircular shape. The upper end surface of the head of the plug 28 may be formed in a shape of 3 to 5 small cones, small pyramids, or the like.

In the above configuration, the press-clamp type connector is positioned and fixed to the electronic circuit board 1, the press-clamp type connector is positioned and clamped between the electronic circuit board 1 and the electric joint 10, and the electrodes 2 of the electronic circuit board 1 are connected to each other. The cap 27 of the spring element 26 is brought into surface contact with the electrical joint 10.
Each electrode 11 is brought into surface contact with the plug 28 of the spring element 26. Then, the electric joint 10 is connected to the electronic circuit board 1.
Is slightly compressed and compressed, each spring element 26 is compressed and deformed, and the electronic circuit board 1 and the electrical joint 10 can be electrically connected via the spring element 26 (see FIG. 1).

According to the above construction, the press-clamp type connector is provided between the electronic circuit board 1 and the electric joint 10 in the housing 2.
Since the connector is interposed via the pin 0, the press-connecting connector can be easily incorporated or mounted on the electronic circuit board 1 itself, and the positioning accuracy and the assemblability can be significantly improved. Further, the height dimension of the press-contact pinch type connector can be reduced without any problem (about 1.50 mm to 1.75 mm), and a low-resistance, low-load connection (for example, 40 g to
(About 60 g / pin) can be greatly expected.

Further, a cap 27 having excellent stability and mountability is fitted and closed in the reduced-diameter hole 23 of each through-hole 21 and the plug 28 is brought into surface contact with the electrode 11 of the electric joint 10.
Stable conduction can be greatly expected. In addition, since the head of the stopper 28 is formed in a hemispherical or semi-elliptical shape, for example, the spring element 2
Even if 6 is slightly inclined forward, backward, left and right, the stability of conduction can be ensured. Furthermore, if the head of each plug 28 is formed in a plurality of small cones or small pyramids, the oxide film of the solder is broken when the connection between the electronic circuit boards 1 is performed, especially when the electrodes 2 are plated with solder. Reliable conduction can be achieved. Furthermore,
An endless groove is formed in the peripheral surface near the head of the plug 28 by recessing, and the end of the spring element 26 is fitted into this groove, so that the spring element 26 is hardly detached.

FIGS. 4 to 6 show a second embodiment of the present invention. In this embodiment, a housing 20 is interposed between an electronic circuit board 1 and an electric joint 10. A spring element 26 is fitted into each of the plurality of through holes 21, and the diameter of the center of the spring element 26 is made larger than the diameter of the upper and lower ends of each spring element 26. The plug 28 projecting from the surface of the electronic circuit board 1 is fitted to and supported by a plug 28 having a substantially convex cross section.
Of the upper plug 28 projecting from the housing 20
Are brought into surface contact with the electrodes 11 of the electric joint 10 respectively.

As shown in FIG. 2, the housing 20 includes a pair of housing plates 29 for convenience of assembly.
The pair of housing plates 29 are vertically stacked to form a flat rectangular shape. As shown in FIG. 6, each through-hole 21 is formed integrally and continuously from the tapered hole 24, the reduced diameter hole 23, and the tapered hole 24 located on the electronic circuit board 1 side. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted. In this embodiment, the same operation and effect as those of the above embodiment can be expected. Further, since the tapered holes 24 located at both ends of each through hole 21 are narrowed, dropping of the spring element 26 and the like can be extremely effectively performed. Can be prevented.

Next, FIGS. 7 to 9 show a third embodiment of the present invention. In this case, an insulating housing is provided between a flat electronic circuit board 1 and an electric joint 10. 2
The conductive spring elements 26 are respectively fitted into the plurality of through holes 21 with the spring elements 26 interposed therebetween.
The diameter from the lower end to the center of the spring element 26 is formed to be larger than the diameter of the upper end, and the upper end of the spring element 26 projects from the surface of the housing 20 from the center to the lower end of each spring element 26. The stopper 28 is fitted, and this stopper 28
The protruding portion is brought into contact with the electrode 2 of the electronic circuit board 1, and the upper end of each spring element 26 is brought into contact with the electrode 11 of the electric joint 10. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted.

Next, FIGS. 10 (a) and 10 (b) show a fourth embodiment of the present invention.
The slits 30 having a substantially triangular shape are formed on both side surfaces of each of the spring elements 26 according to the number of the spring elements 26 so that the housing 20 can be divided for each spring element 26. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted. In this embodiment, the same operation and effect as those of the above embodiment can be expected. In addition, the housing 20 can be easily divided for each spring element 26 by using the slit 30, and the unnecessary spring element 26 can be easily omitted by the user. Therefore, the assembling property, mounting property, and workability can be significantly improved.

FIG. 11 shows a fifth embodiment of the present invention. In this case, a pair of positioning holes (not shown) are formed in the electronic circuit board 1 and the housing 2
Positioning pins 31 are planted at both ends of the lower surface of the electronic circuit board 0, respectively, and the press-connecting-type connector is positioned and fixed to the electronic circuit board 1 by using the positioning holes and the positioning pins 31. The other parts are the same as those in the above-described embodiment, and a description thereof will be omitted. According to the present embodiment,
With a simple configuration, the positioning accuracy and mountability of the press-connecting connector can be further improved.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a press-connecting connector according to the present invention. Example 1 The press-clamp-type connector of the first embodiment was positioned and fixed on an electronic circuit board using a solder cream, and the press-clamp-type connector was positioned and clamped between the electronic circuit board and the electric joint. The electrode was brought into surface contact with the cap, and each electrode of the electrical conjugate was brought into surface contact with the plug.

The housing of the crimping type connector is ABS
The resin was molded to a height of 0.95 mm, and a plurality of through holes were formed in a line at a pitch of 1.0 mm by arranging ten through holes. Each through-hole has an enlarged diameter hole φ0.75 mm, a reduced diameter hole φ0.
60mm, taper hole φ0.60mm ~ φ0.40mm,
And the diameter of the smallest diameter hole was 0.40 mm. Further, a spring element having a height of 1.50 mm was incorporated in the plurality of through holes of the housing.

As the thin metal wire forming each spring element, a thin metal wire obtained by applying gold plating to a metal wire made of brass via a nickel base plating was used. Each spring element has a length of 1.75 mm and extends from the surface of the housing at a distance of 0.75 mm.
8 mm was exposed. The diameter from the lower end to the center of each spring element is φ0.60 mm, and the diameter at the upper end is φ0.40.
mm. Further, the cap and the stopper were formed of the same material as each spring element, and the height of the press-connecting connector was 1.75 mm.

[0025] After positioning and holding the press-clamp-type connector between the electronic circuit board and the electric joint, the electric joint is pressurized and compressed against the electronic circuit board to electrically connect the electronic circuit board and the electric joint. did. The relationship between the amount of compression and the load of the press-connecting connector at this time is summarized in the graph of FIG. In the figure, the vertical axis indicates the load, and the horizontal axis indicates the amount of compression.

As is clear from FIG. 12, according to the press-connecting type connector of this embodiment, the load when 10 spring elements are compressed by 0.5 mm is about 6N, that is, per spring element. The load could be about 60 g, and the connection could be made with a low load. On the other hand, in the case of the conventional press-clamp type connector, although not shown, the load when 10 connectors are compressed by 0.5 mm is 10 N, and the load per connector is 100 g. Connection could not be made by load.

Example 2 The press-clamp type connector according to the third embodiment is positioned and fixed on an electronic circuit board using a solder cream, and the press-clamp type connector is positioned and clamped between the electronic circuit board and the electric joint. Each electrode of the substrate was brought into surface contact with the cap of the spring element, and each electrode of the electrical joint was brought into surface contact with the upper end of the spring element.

The housing of the crimping connector is made of ABS
The resin was molded to a height of 0.95 mm, and a plurality of through holes were formed in a line at a pitch of 1.0 mm by arranging ten through holes. Each through-hole has an enlarged diameter hole φ0.75 mm, a reduced diameter hole φ0.
60mm, taper hole φ0.60mm ~ φ0.40mm,
And the diameter of the smallest diameter hole was 0.40 mm. Further, a spring element having a height of 1.75 mm was incorporated in the plurality of through holes of the housing.

As the thin metal wire forming each spring element, a thin metal wire obtained by applying a gold plating to a metal wire made of brass via a nickel base plating was used. Each spring element has a length of 1.75 mm and extends from the surface of the housing at a distance of 0.75 mm.
8 mm was exposed. The diameter from the lower end to the center of each spring element is φ0.60 mm, and the diameter at the upper end is φ0.40.
mm. Further, the cap was formed of the same material as each spring element.

When the press-connecting connector is positioned and sandwiched between the electronic circuit board and the electric joint, the electric joint is pressed and compressed against the electronic circuit board to electrically connect the electronic circuit board and the electric joint. did. The relationship between the amount of compression and the load of the press-connecting connector at this time is summarized in the graph of FIG.

[0031]

As described above, according to the present invention, there is an effect that the positioning accuracy and the assemblability of the press-contact and pinch type connector can be improved. In addition, the height of the press-connecting connector can be reduced, and a low-load connection is also possible.

[Brief description of the drawings]

FIG. 1 is a partially sectional explanatory view showing an embodiment of a press-contact and pinch type connector according to the present invention.

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

FIG. 3 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. 4 is a partial cross-sectional explanatory view showing a second embodiment of the press-clamping connector according to the present invention.

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

FIG. 6 is an explanatory cross-sectional view of a main part of a second embodiment of the press-contact and pinch type connector according to the present invention.

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

FIG. 8 is an explanatory perspective view showing a third embodiment of a press-contact pinching connector according to the present invention.

FIG. 9 is an explanatory sectional view showing a main part of a third embodiment of a press-contact pinching connector according to the present invention.

FIGS. 10A and 10B are explanatory views showing a fourth embodiment of a press-clamping connector according to the present invention, wherein FIG. 10A is a plan view and FIG. 10B is a side view.

FIG. 11 is a side view showing a press-contact pinching connector according to a fifth embodiment of the present invention.

FIG. 12 is a graph showing an embodiment of a press-clamping type connector according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic circuit board 2 Electrode 10 Electric joint 11 Electrode 20 Housing 21 Through hole 22 Enlarged hole 23 Reduced diameter hole 24 Tapered hole 25 Most reduced diameter hole 26 Spring element 27 Cap 28 Plug

Claims (4)

[Claims] 1. A pressure-clamping connector to be clamped between opposing electrodes, wherein at least one end of each of the through-holes of an insulating housing having a plurality of through-holes oriented in a thickness direction is provided. Is formed to be larger than the diameter of the other end, has a cap or plug at one end, and is fitted with a conductive spring element provided so that the other end protrudes from the surface of the housing. A press-clamp type connector characterized by the following characteristics. 2. The press-clamping connector according to claim 1, wherein at least one end has a diameter larger than that of the other end instead of the spring element. A press-clamping connector using a spring element formed to be smaller than the diameter of the central part connecting the two. 3. The press-clamping connector according to claim 1, wherein each of the through holes comprises a reduced diameter hole, a most reduced diameter hole, and a tapered hole connecting the reduced diameter hole and the most reduced diameter hole. 4. The press-clamping connector according to claim 1, wherein a cap or a stopper provided at one end of the spring element projects beyond the housing.