JP2010107434A - Contact - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact for preventing contact failure, without fail. <P>SOLUTION: The contact includes a first contact section abutting against one member, and a second contact section abutting against the other member, while being electrically connected to the first contact section. The first contact section includes a contact piece, directly abutting against one member, and a contact tube integrally provided in the contact piece. The second contact section includes an energization means and an elasticizing member. By the energization means, a tip side is inserted into the contact tube, at the first contact section while a base end side abuts against the other member, and the first contact section is energized to the side of one member. The elastic member covers the outside of the energization means, while being mutually connected on the side of the base end of the energization means, and elastically abuts against the outer or the inner surface of the contact tube, at the first contact section for electric connection. Also, the elastic member includes coil springs that elastically abut against the outer surface of the contact tube at a plurality of points or lines. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a contact that is in contact with an electrode provided on a wiring board, a semiconductor integrated circuit, or the like.

  A contact for electrically connecting electrical circuits and the like of wiring boards disposed opposite to each other is generally known. Such a contact includes a spring and elastically connects the two opposed electrodes by the spring. An example of this is shown in FIG.

  The contact 1 is mainly composed of a sleeve 2, a first contact piece 3, a second contact piece 4, and a spring 5.

  The sleeve 2 is a cylindrical member for accommodating the first contact piece 3 and the like therein. Both ends of the sleeve 2 are caulked so that the first contact piece 3 and the second contact piece 4 do not fall out. The first contact piece 3 includes a plunger portion 3A and a contact bar portion 3B. The plunger portion 3A is inserted into the sleeve 2, and the contact rod portion 3B extends from the sleeve 2 to the outside. Similarly, the second contact piece 4 includes a plunger portion (not shown) and a contact bar portion 4B. The plunger portion is inserted into the sleeve 2, and the contact bar portion 4 </ b> B extends from the sleeve 2 to the outside. The spring 5 is inserted between the two plunger portions in the sleeve 2 and urges them in a direction away from each other. Thereby, the plunger portion 3A of the first contact piece 3 and the sleeve 2 are in electrical contact with each other, and the sleeve 2 and the plunger portion of the second contact piece 4 are in electrical contact with each other. The contact bar portion 3B of the contact piece 3 and the contact bar portion 4B of the second contact piece 4 are electrically connected.

  And the 1st contact piece 3 and the 2nd contact piece 4 of the contactor 1 each contact two electrodes which oppose, and electrically connect between each electrode.

Moreover, there are Patent Documents 1 to 3 as examples having the same function as the contact 1.
Japanese Patent Laid-Open No. 2004-257831 JP 2004-247170 A Japanese Patent Laid-Open No. 2001-41976

  However, in the conventional contact 1 described above, the first contact piece 3 and the second contact piece 4 and the sleeve 2 do not contact each other over the entire surface. Since the outer diameters of the plunger portion 3A of the first contact piece 3 and the plunger portion of the second contact piece 4 are smaller than the inner diameter of the sleeve 2 and no gap is provided, the first contact piece 3 cannot slide. There is a gap between the outside of the second contact piece 4 and the inside of the sleeve 2. For this reason, as shown in FIG. 3, the plunger portion comes into contact with the inner surface of the sleeve 2 at approximately one point P. If contact is repeated at one point, the part will wear and eventually corrode, causing poor contact.

  For this reason, the transmission accuracy of a signal etc. falls. Moreover, the replacement frequency of the contact 1 increases, and the running cost increases. Furthermore, there is a problem that the work efficiency is reduced during work such as inspection.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a contactor that eliminates contact failure and improves signal transmission accuracy, cost reduction, and work efficiency.

  The contact according to the present invention includes a first contact portion that contacts one member, and a second contact portion that contacts the other member while being electrically connected to the first contact portion. In the contact that electrically connects the one member and the other member, the first contact portion is provided integrally with the contact piece that directly contacts the one member, and the contact piece. The second contact portion is inserted into the contact tube of the first contact portion with the base end side in contact with the other member, and the first contact portion is inserted into the contact tube of the first contact portion. Of the contact tube of the first contact portion provided so as to cover the outside of the biasing means in a state of being connected to each other on the base end side of the biasing means. An elastic member that elastically contacts and electrically connects to the outer or inner surface And features.

  In the contactor according to the present invention, the elastic member is in elastic contact with and electrically connected to the contact tube of the first contact portion, thereby making contact at a plurality of points or lines, wear, Corrosion can be prevented and contact failure can be eliminated.

  Hereinafter, a contact according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a contact according to this embodiment. In the contact of this embodiment, like the conventional contact, the members such as one electrode and the other member such as the electrode are electrically connected to each other to electrically connect the electric circuits and the like of the facing wiring boards to each other. It is intended for connection. This contact can be used as, for example, a spring probe or a pogo pin. Since parts other than this contact are the same as those in the conventional or known technology, only the contact will be described below.

  The contact 10 of the present embodiment is in contact with a first contact portion 11 that is in contact with a member such as one electrode and the other electrode and the like while being electrically connected to the first contact portion 11. And the second contact portion 12.

  The first contact portion 11 includes, for example, a contact piece 14 that directly contacts a solder ball-shaped electrode 13 as one member, and a contact tube 15 that is provided integrally with the contact piece 14.

  The contact piece 14 has a pointed portion 14A that bites into the electrode 13 at the tip (upper end) thereof. The interval between the cusps 14A is set slightly smaller than that of the electrode 13, and each cusp 14A bites into the electrode 13 so as to be electrically connected reliably.

  The contact tube 15 is a member for electrically connecting to the second contact portion 12. The contact tube 15 is formed in a cylindrical shape, and an upper end portion thereof is provided integrally with the contact piece 14. The lower end portion of the contact tube 15 is opened, and an urging means 17 for the second contact portion 12 to be described later is inserted. A conical contact surface 15 </ b> A is formed on the bottom (upper end) of the contact tube 15. The contact surface 15A is a surface with which the urging means 17 abuts. By pressing the upper end portion of the urging means 17 against the contact surface 15A, the upper end portion of the urging means 17 is contracted along the slope of the contact surface 15A so as to come into strong contact and come into stable contact. ing. The force of pressing the upper end of the urging means 17 against the contact surface 15A and the force of the upper end of the urging means 17 trying to spread by the upper end of the urging means 17 being strongly contacted while reducing its diameter. The urging means 17 and the first contact portion 11 are securely and electrically connected to each other so as to be electrically connected.

  On the outer surface of the end portion of the contact tube 15 (lower end portion in FIG. 1), the contact tube 15 inserted into an elastic member 18 which is a coil spring described later is allowed to move smoothly to ensure electrical contact. A taper 15B is provided. The contact tube 15 moves smoothly in the elastic member 18 by the taper 15 </ b> B so that the elastic member 18 is elastically adhered to the outer surface of the contact tube 15. The taper 15B is configured by a straight or curved slope. That is, it is composed of a straight slope as a part of a conical surface or a curved slope as a part of a spherical surface. The taper 15B ensures smooth movement of the contact tube 15 even when the contact tube 15 and the elastic member 18 are displaced from each other and the contact tube 15 is inserted obliquely into the elastic member 18. The contact tube 15 is caught on the coil spring (elastic member 18), and the deformation of the coil spring caused thereby is eliminated, so that the coil spring is elastically adhered to the surface of the contact tube 15.

  A movement restricting means 15 </ b> C is provided on the outer peripheral surface of the contact tube 15 at the end of the contact piece 14. This movement restricting means 15 </ b> C is a means for restricting the movement of the first contact portion 11. The movement restricting means 15C is composed of an annular ridge 16A and an annular groove 16B. The annular ridge 16A is fitted between the front plate 20 and the middle plate 21 of the device to which the contact 10 is mounted. An intermediate plate 21 is fitted in the annular groove 16B. Thereby, the movement of the contact 10 is regulated within a range in which the annular ridge 16A and the intermediate plate 21 can be displaced.

  The second contact portion 12 includes an urging means 17 and an elastic member 18.

  The urging means 17 is a means for urging the first contact portion 11 toward the electrode 13 that is one member side. The urging means 17 is composed of a compression coil spring that can be expanded and contracted without sticking the bar-shaped spring steel wound a plurality of times, and the tip side thereof is inserted into the contact tube 15 of the first contact portion 11. And the front-end | tip part of the biasing means 17 is contacting 15 A of contact surfaces. The base end side of the urging means 17 is in contact with the electrode 23 which is the other member. Thereby, the urging means 17 electrically connects the electrode 23 and the contact piece 14.

  The elastic member 18 is a member for elastically contacting and electrically connecting to the outer surface of the contact tube 15 of the first contact portion 11. The elastic member 18 is provided so as to cover the outside of the urging means 17 in a state of being connected to each other on the base end side (lower end side in FIG. 1) of the urging means 17. The elastic member 18 is constituted by a coil spring. That is, the elastic member 18 is formed in a cylindrical shape by winding a rod-shaped spring steel in a coil shape, and is fitted to the outside of the contact tube 15. Since the elastic member 18 is a coil spring, the diameter of the elastic member 18 can be elastically changed, and the elastic member 18 is elastically in contact with the outer surface of the contact tube 15 at a plurality of points or lines P, P,. Electrically connected. Specifically, the elastic member 18 is set so that the inner diameter of the coil spring is smaller than the outer diameter of the contact tube 15. As a result, the contact tube 15 is inserted into the coil spring, and the coil spring is elastically contacted to the outer surface of the contact tube 15 at a plurality of points or lines and is electrically closely connected. Further, since the coil spring is elastically wound around the contact tube 15, even if the contact tube 15 and the elastic member 18 are shifted from each other in the horizontal direction or in the vertical direction, they are reliably kept in electrical contact. It is supposed to be.

  The coil spring of the elastic member 18 is composed of a bar-shaped spring steel wound a plurality of times, but is composed of a close-contact spring that only stretches in close contact with each other. That is, the inner diameter of the coil spring of the elastic member 18 is elastically changed without contracting in the longitudinal direction, and deforms by flexibly following the shape of the contact tube 15 along the insertion of the contact tube 15. Electrical contact is made at the contact surface.

  The lower portion of the elastic member 18 is conically narrowed and integrally connected to the lower portion of the biasing means 17. Thus, the elastic member 18 is disposed so as to cover the outside of the urging means 17 in a state where the urging means 17 and the lower portion of the elastic member 18 are connected to each other. The contact tube 15 is inserted into the elastic member 18 with the urging means 17 inserted therein.

  The elastic member 18 is inserted into the fitting hole 22 of the device to which the contact 10 is mounted. When the elastic member 18 is inserted into the fitting hole 22, the lower end portion of the elastic member 18 extends to the outside, and is brought into contact with the electrode 23 together with the urging means 17.

  Next, operation | movement of the contactor 10 of the said structure is demonstrated.

  The second contact portion 12 of the contact 10 is inserted into the fitting hole 22 and electrically contacted with the electrode 23. The first contact portion 11 is attached to the front plate 20 and the middle plate 21, and the contact tube 15 is inserted into the elastic member 18.

  In this state, when the contact piece 14 comes into contact with the electrode 13 and bites, the contact piece 14 is pushed in by the reaction. As a result, the contact tube 15 is pushed into the elastic member 18.

  At this time, the taper 15B at the tip of the contact tube 15 slides smoothly without being caught in the elastic member 18, and the elastic member 18 flexibly deforms following the outer diameter of the contact tube 15. Thereby, the electrical contact state between the contact tube 15 and the elastic member 18 is maintained, and electrical connection is ensured. Further, the biasing means 17 is pressed against the contact surface 15A, and the electrical connection state is maintained. In this state, an inspection signal or the like is transmitted.

  When the contact piece 14 is brought into contact with a new electrode 13 after the inspection or the like is completed, the same slide as described above is repeated. Then, no matter how many times the contact tube 15 and the elastic member 18 are slid, the elastic member 18 is flexibly deformed following the outer diameter of the contact tube 15 and the electrical contact state is maintained. That is, the state where the contact tube 15 and the elastic member 18 are electrically connected reliably is maintained. Similarly, the electrical connection state is maintained between the urging means 17 and the contact surface 15A.

[effect]
As described above, the contact tube 15 of the first contact portion 11 and the urging means 17 and the elastic member 18 of the second contact portion 12 are electrically and reliably connected to each other. And the problem of corrosion can be solved and contact failure can be reliably prevented. This improves the signal transmission accuracy. Since wear and corrosion at the contact points are reduced, maintenance costs can be reduced and work efficiency can be improved.

  By configuring the elastic member 18 with a coil spring and elastically changing the diameter thereof, the outer surface of the contact tube 15 is elastically contacted with a plurality of points or lines, and the contact is ensured by flexible deformation. As a result, the electrical connection can be reliably maintained. Even if the contact tube 15 is displaced within the elastic member 18, further several times, or obliquely, the elastic member 18 is flexibly deformed, and electrical connection can be reliably maintained.

[Modification]
In the embodiment, the elastic member 18 is fitted to the outside of the contact tube 15 of the first contact portion 11 so as to elastically contact the outer surface of the contact tube 15. It may be inserted into the interior and elastically contacted and electrically connected to the inner surface. In this case, the outer diameter of the elastic member 18 is set larger than the inner diameter of the contact tube 15, and the elastic member 18 is compressed and inserted into the contact tube 15. And the elastic member 18 absorbs various shift | offset | differences and maintains an electrical connection reliably. Also in this case, the same operation and effect as the above-described embodiment can be obtained.

  In the above embodiment, the urging means 17 is constituted by a coil spring, but other means may be used. Other means may be used as long as the first contact portion 11 can be biased toward the electrode 13 and can be expanded and contracted by the width of the annular groove 16B.

It is sectional drawing which shows the contactor which concerns on embodiment of this invention. It is a partially broken front view which shows the conventional contactor. It is a plane sectional view of the contact of FIG.

Explanation of symbols

  10: contact, 11: first contact portion, 12: second contact portion, 13: electrode, 14: contact piece, 15: contact tube, 17: biasing means, 18: elastic member, 20: front plate , 21: middle plate, 22: fitting hole, 23: electrode.

Claims (6)

A first contact portion that contacts one member; and a second contact portion that contacts the other member in a state of being electrically connected to the first contact portion, the one member and the other member In the contact that electrically connects between the members,
The first contact portion includes a contact piece that directly contacts the one member, and a contact tube provided integrally with the contact piece,
The second contact portion is inserted into the contact tube of the first contact portion with the base end side in contact with the other member, and the first contact portion is attached to the one member side. An urging means for urging and elastically applied to an outer surface or an inner surface of the contact tube of the first contact portion provided to cover the outer side of the urging means in a state of being connected to each other on the base end side of the urging means. And an elastic member that contacts and electrically connects to the contact. The contact according to claim 1,
A contactor characterized in that the elastic member is constituted by a coil spring that elastically changes its diameter and contacts the outer or inner surface of the contact tube elastically at a plurality of points or lines. The contact according to claim 2,
An inner diameter of the coil spring is set to be smaller than an outer diameter of the contact tube, and the contact tube is inserted into the coil spring, whereby a plurality of the coil springs are elastically formed on the outer surface of the contact tube. A contact that is brought into electrical contact by contact at a point or line. The contact according to claim 3,
A contactor characterized in that a linear or curved taper is provided at the end of the contact tube to allow smooth movement even in the contact tube inserted obliquely into the coil spring to ensure electrical contact. The contact according to claim 2,
A contactor characterized in that the coil spring is composed of a contact spring in which rod-shaped spring steel wound a plurality of times is in close contact with each other. The contact according to claim 1,
The urging means is composed of a compression coil spring that can be expanded and contracted without sticking the bar-shaped spring steel wound several times,
The contact surface in the contact tube is conically formed;
An end of the compression coil spring contacts the conical contact surface while being compressed.

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