JP2014096325A - Contact - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure excellent electric connection regardless of a positional relationship of a conductor and other conductor, in a contact which is soldered to the conductor and connecting the conductor electrically to other conductor.SOLUTION: A contact part 10 composed of a conductive rubber has such a structure that a proximal portion 12 spreading with a large diameter is adjoining the outer periphery of the other end face 11B of a tip portion 11 configured in a dense cylindrical shape having one end face 11A becoming the contact part for other conductive member, and is fitted in a bottomed cylindrical metal support 20 having a swaged tip part 22A. When the end face 11A is pressed by other conductor, the proximal portion 12 abuts against the inner wall surface at the cylindrical portion 22 of the support 20.

Description

  The present invention relates to a contact that is soldered to a conductor and electrically connects the conductor to another conductor.

  Conventionally, various contacts have been proposed that are soldered to a conductor such as a circuit pattern of a printed wiring board and electrically connect the conductor to another conductor such as a shield case or a ground conductor. In this type of contact, since the electrical connection is made when the contact comes into contact with the other conductor, the contact with the other conductor is made conductive in order to improve the contact (adhesion). It has been proposed to use a conductive elastic material such as a conductive elastomer (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2004-139881

  However, in the contact of Patent Document 1, a member made of the elastic material is integrally formed with a metal member soldered to the conductor. For this reason, depending on the positional relationship between the conductor and the other conductor, the other conductor and the member made of the elastic material are not in good contact, or biased stress is applied to the member made of the elastic material. There was a possibility that it would affect the durability under poor environment.

  Therefore, according to the present invention, in a contact that is soldered to a conductor and electrically connects the conductor to another conductor, the electrical connection is made excellent regardless of the positional relationship between the conductor and the other conductor. It was made for the purpose of making it.

  The contact of the present invention made to achieve the above object is formed of a metallic material in a bottomed cylindrical shape, and is formed of a support portion soldered to a conductor at the bottom, and an elastic material having conductivity at least on the surface, A contact portion that is inserted into the support portion and is movably disposed within a cylindrical portion of the support portion, and at least a tip portion farthest from the bottom portion protrudes from an opening of the cylindrical portion of the support portion; It is characterized by having.

  The contact of the present invention configured as described above is soldered to the conductor at the bottom of the support portion, and the tip of the contact portion protruding from the opening of the support portion is connected to another conductor to be electrically connected to the conductor. Used in contact. Here, the contact portion is formed of an elastic material having conductivity on at least the surface, and is configured to be movable within a cylindrical portion of a support portion that is formed of a metal material in a bottomed cylindrical shape. For this reason, the contact portion deforms itself and moves freely within the cylindrical portion of the support portion, so that the contact portion can be satisfactorily connected to the other conductor regardless of the positional relationship between the conductor and the other conductor. Contact and stress applied to the contact portion are also suppressed. Therefore, when the contact according to the present invention is used, the electrical connection is excellent regardless of the positional relationship between the conductor and the other conductor.

  When the tip of the contact portion is pressed in the direction of the bottom of the support portion, the contact portion is elastically deformed, and at least a part of the outer periphery of the contact portion is a cylindrical shape of the support portion. You may contact | abut to a partial inner wall surface. In this case, since the contact area between the contact portion and the support portion increases, the contact of the present invention can be used well for high frequency noise countermeasures.

  In addition, the opening of the cylindrical portion of the support portion is narrowed to a small diameter, and the contact portion has a base portion that is smaller in diameter than the opening portion and disposed inside the cylindrical portion. May have a larger diameter than the opening. In that case, the tip of the contact portion protrudes through the opening, but the base is larger in diameter than the opening, and therefore cannot easily pass through the opening. Can be suppressed.

  In that case, the base portion may have a hollow structure opened to the bottom side. In that case, since the base having a larger diameter than the tip has a hollow structure, the contact portion is more easily deformed at the base. For this reason, it becomes easier to displace the front-end | tip part of a contact part according to the positional relationship of the said conductor and said other conductor. Further, when pressed, the base portion swells outward to further contact the inner wall surface of the cylindrical portion of the support portion, and the contact area increases. Therefore, in this case, the electrical connection is further improved.

  Further, the cylindrical part inner wall surface of the support part and the outer peripheral surface of the contact part may be similar in cross section in any place in parallel to the bottom part. In that case, when the tip of the contact portion is pressed in the bottom direction, the outer periphery of the contact portion is more likely to come into contact with the inner wall surface of the cylindrical portion of the support portion, and the contact portion and the support portion The contact area can be increased more favorably.

  In that case, the cross-sectional shape parallel to the bottom portion of the contact portion and the support portion may be a circle or a ring at any location. In this case, since the cross-sectional shape is isotropic, the outer periphery of the contact portion is more likely to come into contact with the inner wall surface of the cylindrical portion of the support portion when pressed, and the contact portion and the support portion The contact area can be increased even better.

They are a top view (A), a front view (B), a bottom view (C), a perspective view (D), and a longitudinal sectional view (E) showing a configuration of a contact to which the present invention is applied. It is the top view (A), front view (B), bottom view (C), perspective view (D), and longitudinal cross-sectional view (E) showing the structure of the contact part of the contact. It is the top view (A), front view (B), bottom view (C), perspective view (D), and longitudinal cross-sectional view (E) showing the structure of the support part of the contact.

  Next, embodiments of the present invention will be described with reference to the drawings. 1A and 1B are diagrams showing a configuration of a contact 1 to which the present invention is applied, in which FIG. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a bottom view, FIG. FIG. 3 is a cross-sectional view taken along line AA in (B). As shown in FIG. 1, the contact 1 of the present embodiment has a contact portion 10 made of conductive rubber (an example of an elastic material: may be a conductive elastomer other than rubber) with a metal material. It is configured by being inserted into a cylindrical support portion 20.

  2A and 2B are diagrams illustrating the configuration of the contact portion 10, where FIG. 2A is a plan view, FIG. 2B is a front view, FIG. 2C is a bottom view, FIG. 2D is a perspective view, and FIG. It is a BB sectional view. 3A and 3B are diagrams illustrating the configuration of the support unit 20, in which FIG. 3A is a plan view, FIG. 3B is a front view, FIG. 3C is a bottom view, FIG. 3D is a perspective view, and FIG. It is a CC sectional view taken on the line of FIG.

The contact part 10 is comprised by the electroconductive rubber manufactured by the process of the following (1)-(3). That is, (1). Weigh each material in a predetermined amount. The material is mainly silicone rubber, silver filler, and other additives. (2). The weighed material is kneaded under predetermined conditions until it is properly dispersed with a kneader or a biaxial roller. (3). The kneaded material is molded into the shape shown in FIG. 2, heated under predetermined conditions, and crosslinked. The conductive rubber molded in this manner has a hardness of 20 to 90 with a JIS K 6301 A-type hardness meter, and a volume resistance value of 1 × 10 ⁻¹ to 1 × 10 ⁻⁴ Ω · cm. It has conductivity.

  As shown in FIG. 2, the contact portion 10 has an end portion 11 on the outer periphery of the other end surface 11 </ b> B of the end portion 11 configured in a dense columnar shape with one end surface 11 </ b> A serving as a contact portion with respect to another conductive member. It has a structure in which the base 12 configured to have a hollow cylinder shape with a larger diameter is connected. The connecting portion of the base portion 12 with respect to the end surface 11B of the distal end portion 11 is smoothly curved outward, and the end surface 11B and the base portion 12 form a shape in which a cup of water is covered.

  As shown in FIG. 3, the support portion 20 has a bottomed cylindrical shape in which an annular cylindrical portion 22 (an example of a cylindrical portion) is erected along the outer periphery of a disk-shaped bottom portion 21, A metal material such as phosphor bronze, beryllium copper, or SUS is formed into a predetermined shape by cutting, forging, pressing, or the like. The distal end portion 22A of the cylindrical portion 22 is caulked in a tapered shape as shown in the figure so that the opening portion 23 becomes smaller after the contact portion 10 is inserted into the hollow portion 25 inside the cylindrical portion 22 as follows. However, it may be configured as shown in the figure from the beginning, and the contact portion 10 may be deformed and inserted from the opening 23.

  The hollow portion 25 of the support portion 20 has a larger diameter than the base portion 12 of the contact portion 10, and as shown in FIG. 1, the contact portion 10 has an end edge 12 </ b> B of the base portion 12 (an edge opposite to the front end portion 11). Is inserted into contact with the bottom 21. Thereafter, the distal end portion 22A is caulked as described above, whereby the opening 23 is narrowed to a diameter smaller than that of the base portion 12, and the contact portion 10 does not fall off the support portion 20. Further, in this state, most of the tip end portion 11 is disposed so as to protrude from the opening 23.

  The contact 1 configured in this manner solders the bottom portion 21 of the support portion 20 to a conductor pattern or the like of the printed wiring board, and connects the end surface 11A of the tip portion 11 of the contact portion 10 protruding from the opening portion 23 of the support portion 20. It is used in contact with other conductors such as a shield case, device casing, and ground conductor.

  Here, as described above, the base portion 12 of the contact portion 10 having conductivity is movable in the hollow portion 25 of the support portion 20 having a larger diameter than that, and as a result, the contact portion 10 is also a support portion. 20 can move within a certain range. For this reason, the contact portion 10 is deformed and moves within the above range with respect to the support portion 20, so that the end face 11 </ b> A can be obtained even if the conductor pattern and the other conductors do not face each other in parallel. Can be in good contact with the other conductor. Moreover, it is suppressed that the biased stress is added to the contact part 10 by the contact part 10 moving as mentioned above. Therefore, if the contact 1 of this embodiment is used, both can be favorably electrically connected regardless of the positional relationship between the conductor pattern and the other conductor.

  Further, as described above, the base portion 12 of the contact portion 10 is formed in a hollow cylindrical shape having the hollow portion 15 and is easily deformed. Therefore, when the end surface 11A is pressed toward the bottom portion 21 by the other conductor, the base portion 12 is formed. Bulges outward, and its outer periphery abuts against the inner wall surface of the cylindrical portion 22 as a whole. Therefore, in this state, the contact area between the contact portion 10 and the support portion 20 is increased, and the contact 1 can be used well for high frequency noise countermeasures. In addition, since the base portion 12 is easily deformed as described above, the distal end portion 11 is more easily displaced according to the positional relationship between the conductor pattern and the other conductor.

  Therefore, in this embodiment, the conductor pattern and the other conductor can be electrically connected very well, and when the conductor pattern is an earth pattern and the other conductor ground conductor or the like, printed wiring It is possible to satisfactorily take measures against the ground of the substrate.

  In addition, this invention is not limited to the said embodiment at all, It can implement with a various form in the range which does not deviate from the summary of this invention. For example, in the said embodiment, although the cross-sectional shape parallel to the bottom part 21 of the contact part 10 and the support part 20 is a circle | round | yen or a ring in any place, another shape may be sufficient. However, if the cross-sectional shape is a circle or an annulus at any location, the cross-sectional shape is isotropic, so that the outer periphery of the base 12 further contacts the inner wall surface of the cylindrical portion 22 when pressed. It becomes easy to contact, and the contact area of the contact part 10 and the support part 20 can be increased still more favorably.

  Further, the base portion 12 may have a dense configuration without the hollow portion 15, and the outer periphery of the base portion 12 may have a shape different from the cylindrical portion inner wall of the support portion 20. For example, the outer periphery of the base portion 12 may be gear-shaped and the inner wall of the cylindrical portion of the support portion 20 may be cylindrical, the outer periphery of the base portion 12 may be a cross-shaped cross shape, and the inner wall of the cylindrical portion of the support portion 20 may be a quadrangular cross-sectional shape. There may be. However, when the outer peripheral surface of the base portion 12 and the cylindrical portion inner wall of the support portion 20 have a similar shape as in the above embodiment, when the end surface 11A is pressed in the direction of the bottom portion 21, the outer periphery of the contact portion 10 is It becomes easier to contact the inner wall surface of the cylindrical portion of the support portion 20, and the contact area between the contact portion 10 and the support portion 20 can be further improved. Furthermore, the contact part 10 should just be formed with the elastic material which has electroconductivity at least on the surface, and it cannot be overemphasized that elastic materials other than the above may be used.

DESCRIPTION OF SYMBOLS 1 ... Contact 10 ... Contact part 11 ... Tip part 12 ... Base part 15 and 25 ... Hollow part 20 ... Support part 21 ... Bottom part 22 ... Cylindrical part 22A ... Tip part 23 ... Opening part

Claims (6)

A support portion that is configured in a cylindrical shape with a metal material and whose bottom portion is soldered to a conductor;
At least the surface is formed of an elastic material having conductivity, and is inserted into the support portion so as to be movable in the cylindrical portion of the support portion. At least the tip portion farthest from the bottom portion of the support portion A contact portion protruding from the opening of the tubular portion;
A contact characterized by comprising.   When the tip of the contact portion is pressed in the direction of the bottom of the support portion, the contact portion is elastically deformed, and at least a part of the outer periphery of the contact portion is within the cylindrical portion of the support portion. The contact according to claim 1, wherein the contact is in contact with a wall surface. The support part has the opening of the cylindrical part narrowed down to a small diameter,
The contact portion is configured such that the tip portion has a smaller diameter than the opening portion, and a base portion disposed inside the cylindrical portion has a larger diameter than the opening portion. Or the contact according to 2.   The contact according to claim 3, wherein the base has a hollow structure opened to the bottom side.   5. The cylindrical portion inner wall surface of the support portion and the outer peripheral surface of the contact portion are similar in shape at any location in a cross-sectional shape parallel to the bottom portion. Contact described in the section.   The contact according to claim 5, wherein a cross-sectional shape parallel to the bottom portion of the contact portion and the support portion is a circle or a ring at any place.

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