JPH11154545A - connector - Google Patents

Abstract

(57) [Problem] To prevent a contact failure from occurring even if a circuit board or the like is warped, and to prevent a contact from being damaged. SOLUTION: A plurality of belt-like conductive plates 12 each having an end fixed to a shaft 11 and wound around the shaft 11 in a spiral manner and having an outermost periphery having a predetermined diameter and having elasticity are provided. A contact 1 is provided. A plurality of through holes 20 are arrayed and formed in an insulating plate material having a thickness smaller than the outermost diameter of the strip-shaped conductive plate 12, and a plurality of contacts 1 are provided in the plurality of through holes 20. The outer periphery is assembled so as to protrude from both sides of the insulating plate material at a predetermined height, and the outer end of the strip-shaped conductive plate 12 is fixed so that the shaft 11 is rotatable around its central axis. Is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector, and more particularly, to a press-contact type connector for connecting a plurality of pairs of electrodes to be connected.

[0002]

2. Description of the Related Art A connector for electrically connecting a leadless type integrated circuit (IC) and a printed wiring board and for electrically connecting the printed wiring boards to each other are provided between the integrated circuit and the printed wiring board and two connectors. There is a press-clamp-type connector that is sandwiched between printed circuit boards and electrically connected between them.

FIG. 5 shows a first conventional example of such a connector. As shown in FIGS. 5A and 5B, this connector corresponds to an insulator 2a formed by providing a plurality of through holes 231 in an insulating plate member 23, and a plurality of through holes 231 of the insulator 2a. And a plurality of contacts 1a, each of which is provided with a side wall of the through hole 231 and the insulating plate material 2.
The conductor layer 13 formed so as to continuously cover the peripheral portions of the through holes 231 on the upper and lower surfaces of the third and the through holes 231 on which the conductor layer 13 is formed, and protrudes at a predetermined height. Elastic projections 14 made of elastomer formed as described above
And an electrode plate 15 formed on each of the upper and lower surfaces of the elastic projection 14 so as to be electrically connected to the conductor layer 13.
a and 15b (see, for example, JP-A-8-287983).

As shown in FIG. 5C, the connector is held between, for example, circuit boards 300a and 300b, and the elastic projections 14 of the contacts 1a are deformed so that the relative positions of the circuit boards 300a and 300b are changed. A plurality of pairs of pads 301a and 301b facing each
Electrode plates 15a and 15b are pressed against each other, and opposing pads 3
01a and 301b are electrically connected.

Another conventional example (second example) of a press-contact and pinch type connector is a C-shaped connector having elasticity by a spring 17 as shown in FIGS. 6 (a) and 6 (b). Conductive element 16 having contact terminal portions 161 provided at both ends thereof.
The tips of the contact terminal portions 161 protrude from both surfaces of the insulating plate material 24 into the plurality of contact holding portions 241 of the insulator 2 b in which the plurality of contact holding portions 241 are formed on the insulating plate material 24. (See, for example, Japanese Patent No. 2519006). Furthermore, an example in which the contact is bent in a V-shape instead of a C-shape (for example,
No. 22896).

[0006]

In the first example, the conventional connectors described above are, for example, circuit boards 300a and 300b.
The elastic projections 14 of the contact 1a are deformed by being sandwiched therebetween, and the electrode plates 15a, 15a of the contact 1a are deformed.
b and the pads 301a, 3 on the circuit boards 300a, 300b
01b is pressed against the electrode plate 1b.
Since the displacement amounts of the connectors 5a and 15b are small, if the circuit boards 300a and 300b warp when the connector is clamped, or if the circuit boards and the like warp due to other causes, the plurality of contacts 1a In the other examples including the second example, if the length of the contact terminal portion 161 of the contact 1b is increased, for example, the displacement amount of the contact point portion is reduced. Even if the circuit board becomes large and warps, the occurrence of contact failure can be prevented.
1 and the like are easily buckled, and there is a risk that the contact 1b may be damaged.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, it is an object of the present invention to prevent a contact failure from occurring even if a circuit board or the like is warped, and to prevent a contact from being damaged. It is to provide a connector capable of.

[0008]

The connector according to the present invention has the following features to achieve the above object. (B) A plurality of contacts formed by winding a band-shaped conductive plate having elasticity around a predetermined axis so as to have a predetermined outer diameter. A plurality of through holes are arrayed and formed in an insulating plate material having a thickness smaller than a diameter of the outermost periphery of the conductive plate, and the plurality of contacts are provided in the plurality of through holes. Correspondingly incorporated so as to protrude from both sides of the plate material at a predetermined height, and fixing the outer end portions of the strip-shaped conductive plates of the plurality of contacts while the inner end portions are rotatable around a predetermined axis. Insulating substrate holding the plurality of contacts as described above

Further, each of the plurality of contacts is
A shaft having a predetermined length and a band-shaped conductive plate wound around the shaft with one end fixed to the shaft to form a structure including a spring, and the shaft of each of the plurality of contacts is formed on the insulating substrate. A plurality of through-holes that are rotatably held on inner walls of the plurality of through-holes. A shaft holding hole is provided in each of two opposing inner walls of each through hole, and both ends of the shaft of the contact are inserted and held in these shaft holding holes, and the insulating substrate is connected to the shaft holding hole. A structure including an upper substrate and a lower substrate that can be divided vertically in a plane including all the central axes, and the other ends of the strip-shaped conductive plates of the plurality of contacts are connected to an upper substrate and a lower substrate of the insulating substrate. Sandwiched between Configured as a structure to be crowded at fixed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In one embodiment of the present invention, a plurality of strip-shaped conductive plates having elasticity are wound around a predetermined axis in a spiral shape so that the outermost diameter thereof has a predetermined size. And a plurality of through-holes are formed in an insulating plate material having a thickness smaller than the outermost diameter of the strip-shaped conductive plate of the plurality of contacts, and the plurality of contacts are formed in the plurality of through-holes. The outermost periphery of the strip-shaped conductive plate is assembled so as to protrude from both sides of the insulating plate material at a predetermined height, and the outer end portions of the strip-shaped conductive plate of the plurality of contacts are fixed and the inner end portion is simultaneously fixed. Has an insulating substrate that holds the substrate rotatably about a predetermined axis.

With such a configuration, when the electrical connection between the opposed electrodes sandwiched between the integrated circuit and the circuit board or between the two circuit boards is performed, these opposed electrodes are used. From the electrode to be contacted, a force is applied such that the protruding portion of the strip-shaped conductive plate of each contact is pushed into the through hole, and at this time, the tip inside the strip-shaped conductive plate rotates around a predetermined axis (spring-like). If there is a gap between the layers wound around the shaft, the gap is eliminated), and the pressing is performed so as to increase the number of turns of the strip-shaped conductive plate wound around this axis. The amount of displacement between the contact points of the strip-shaped conductive electrodes contacting the corresponding electrodes can be obtained in accordance with the distance between these opposing electrodes, and a sufficient contact pressure can be applied to these electrodes. Therefore, even if the circuit board or the like is warped, it is possible to prevent a contact failure from occurring.

When the protruding portion of the strip-shaped conductive plate is pushed into the through hole by the opposing electrodes,
Since the inner end of the strip-shaped conductive plate rotates around a predetermined axis and absorbs the reduced diameter of the outermost periphery of the strip-shaped conductive plate, the stress generated in the strip-shaped conductive plate is reduced,
Buckling of the strip-shaped conductive plate can be prevented.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. 1 (a) to 1 (c) are perspective views of an entire connector showing an embodiment of the present invention, enlarged perspective views of a contact portion and a lower insulator portion thereof, and FIG. 2 is a partially enlarged sectional view of this embodiment. This embodiment has a configuration having a plurality of contacts 1 and an insulator 2 in which the plurality of contacts 1 are incorporated. Details of the contacts 1 and the insulator 2 are as follows.

Each of the plurality of contacts 1 has a shaft 11
And an elastic band-shaped conductive plate 12 having one end fixed to the shaft 11 and wound around the shaft 11 in a spiral manner so that the outermost periphery thereof has a predetermined diameter. The length of the shaft 11 is longer than the width of the strip-shaped conductive plate 12, and both ends protrude from the strip-shaped conductive plate 12.

The insulator 2 includes an upper insulator 21 and a lower insulator 2 made of an insulating plate.
2, a plurality of through-holes 20 are arranged and formed, and a plurality of contacts 1 are incorporated into each of the plurality of through-holes 20 in a corresponding manner. At the same time as fixing, the outermost periphery of the spirally wound strip-shaped conductive plate 12 of these contacts 1 is protruded from both surfaces of the insulator 2 by a predetermined height so that the shaft 11 of the contact 1 can be rotated around its central axis. So that it can be held.

Further, the more detailed structures of the insulator 2, the upper insulator 21 and the lower insulator 22, are as follows. In each of the plurality of through holes 20 of the insulator 2, a shaft holding hole 201 is provided on each of two opposing inner walls thereof, and these shaft holding holes 201 hold both ends of the shaft 11 of the contact 1. It has become.

The shaft holding hole 201 can be divided vertically by a plane including the center axis of all of the holes 201. The upper insulator 21 is on the upper side and the lower insulator 22 is on the lower side. In addition, a slit-shaped conductive plate fixing portion 202 is formed at the boundary between the upper insulator 21 and the lower insulator 22 on the other inner wall of each of the through holes 20, and the outer end of the strip-shaped conductive plate 12 of the contact 1. Is sandwiched between the conductive plate fixing portions 202 and fixed.

The connector of this embodiment includes a circuit board 300 and an integrated circuit 400 as shown in FIGS.
(The holding means is omitted), and the opposed pads 30 of the circuit board 300 and the integrated circuit 400 are opposed to each other.
Under the force that the projecting portion of the spirally-shaped conductive plate 12 of the contact 1 is pushed into the through-hole 20 by the contact 401, the inner end of the conductive plate 12 is moved to the center axis of the shaft 11. Rotating around the strip-shaped conductive plate 12
Is absorbed by the increase in the number of turns around the shaft 11.

Therefore, the opposite pads 301, 401
Can be obtained in accordance with the distance between the opposing pads 301 and 401, and a sufficient contact pressure can be applied to these pads 301 and 401. Even if the circuit board 300 and the like are warped, a contact failure between the pads 301 and 401 can be eliminated. In addition, since the stress generated in the strip-shaped conductive plate 12 when the strip-shaped conductive plate 12 is pushed is reduced, the strip-shaped conductive plate 12 can be prevented from buckling and the contact 1 can be prevented from being damaged. Note that the outermost diameter of the strip-shaped conductive plate 12 is set to be equal to all the pads 301 and 401 facing each other even if the circuit board 300 or the like is warped.
The size should be such that a sufficient contact pressure can be obtained.

In this embodiment, each of the plurality of contacts 1 has a structure including the shaft 11 and the strip-shaped conductive plate 12. However, when the outermost periphery of the strip-shaped conductive plate 12 is pushed in from above and below, the tip of the inside is formed. If the part rotates around a predetermined axis to increase the number of turns, and the pushed-in portion is absorbed by the increase in the number of turns, the shaft 11 is unnecessary. In this case, the contact is held by the insulator 2 only by fixing the outer end of the strip-shaped conductive plate.

Further, the contact holding structure composed of the shaft and the strip-shaped conductive plate is not limited to the structure of the above-described embodiment. For example, the length of the shaft is made substantially the same as the width of the strip-shaped conductive plate, The center points of both ends may be held by the sharp tip of the projection from the inner wall of the through hole 20, and the insulator may not be divided into upper and lower parts.

[0022]

As described above, according to the present invention, a plurality of contacts formed by winding a band-shaped conductive plate having elasticity into a spiral shape so that the outermost diameter thereof becomes a predetermined size are formed by the above-mentioned method. The outermost peripheries of the strip-shaped conductive plates of these contacts protrude from both surfaces of the insulating substrate at a predetermined height into the plurality of through holes of the insulating substrate in which a plurality of through holes are arranged and formed in an insulating plate material having a thickness smaller than the diameter. In this way, the circuit is structured such that the outer end portions of the strip-shaped conductive plates of the plurality of contacts are fixed and at the same time the inner end portions are rotatably held around a predetermined axis. When the protruding portion of the strip-shaped conductive plate of the contact is sandwiched between the substrate and the integrated circuit and receives a force such that it is pushed into the through-hole, the inner end of the strip-shaped conductive plate rotates around a predetermined axis, and is pressed. The number of turns increases to absorb the reduced diameter of the outermost periphery of the belt, so even if the circuit board or the like is warped, the strip-shaped conductive plate that contacts the opposing electrodes of the circuit board or integrated circuit The amount of displacement between the contacts can be obtained in accordance with the distance between these electrodes, and a sufficient contact pressure can be applied to these electrodes, so that poor contact can be prevented. Since the stress generated in the plate is reduced, the strip-shaped conductive plate does not buckle, and the contact can be prevented from being damaged.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention, an enlarged perspective view of a contact portion thereof, and a partially enlarged perspective view of a lower insulator.

FIG. 2 is a partially enlarged sectional view of the embodiment shown in FIG. 1;

FIG. 3 is a partially enlarged cross-sectional view showing a state where the connector of the embodiment shown in FIG. 1 is sandwiched between a circuit board and an integrated circuit.

FIG. 4 is an exploded perspective view when the connector of the embodiment shown in FIG. 1 is sandwiched between a circuit board and an integrated circuit.

FIG. 5 is a perspective view of the entire appearance showing a first example of a conventional connector, a partially enlarged cross-sectional view thereof, and a partially enlarged cross-sectional view when sandwiched between two circuit boards.

FIG. 6 is an overall external perspective view showing a second example of a conventional connector and a partially enlarged sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b Contact 2, 2a, 2b Insulator 11 Axis 12 Band-shaped conductive plate 13 Conductive layer 14 Elastic projection 15a, 15b Electrode plate 16 Conductive element 17 Spring 20 Through hole 21 Upper insulator 22 Lower insulator 201 Axis holding Hole 202 conductive plate fixing portion 300, 300a, 300b circuit board 301, 301a, 301b pad 400 integrated circuit 401 pad

Claims (4)

[Claims] 1. A connector having the following components. (B) A plurality of contacts formed by winding a band-shaped conductive plate having elasticity around a predetermined axis so as to have a predetermined outer diameter. A plurality of through holes are arrayed and formed in an insulating plate material having a thickness smaller than a diameter of the outermost periphery of the conductive plate, and the plurality of contacts are provided in the plurality of through holes. Correspondingly incorporated so as to protrude from both sides of the plate material at a predetermined height, and fixing the outer end portions of the strip-shaped conductive plates of the plurality of contacts while the inner end portions are rotatable around a predetermined axis. Insulating substrate holding the plurality of contacts as described above 2. A structure in which each of the plurality of contacts includes a shaft having a predetermined length, and a band-shaped conductive plate having one end fixed to the shaft and wound in a spiral around the shaft, The connector according to claim 1, wherein a shaft of each of the plurality of contacts is rotatably held on an inner wall of the plurality of through holes of the insulating substrate. 3. A length of a shaft of each of the plurality of contacts is larger than a width of a strip-shaped conductive plate of each of the contacts. A shaft holding hole is formed in each of two opposed inner walls of each of the plurality of through holes of the insulating substrate. The upper substrate and the lower substrate, which can insert and hold both ends of the shaft of the contact in these shaft holding holes and hold the insulating substrate up and down on a plane including the center axis of all the shaft holding holes. 3. The connector according to claim 2, wherein the connector comprises a side substrate. 4. The connector according to claim 3, wherein the other end of the strip-shaped conductive plate of each of the plurality of contacts is sandwiched and fixed between an upper substrate and a lower substrate of the insulating substrate.