JP5776354B2 - Contact electrode and contactor - Google Patents

Description

  The present invention relates to a contact electrode and a contactor used for a device evaluation jig or the like.

  In a device evaluation jig for evaluating device electrical continuity and the like, a contactor having a contact electrode for electrically connecting a device electrode and a circuit board electrode is used. Conventional contact electrodes are composed of a conductor having a complicated shape. In addition, a contact electrode in which a plurality of Au balls is held by an elastic holding member so as to be deformable has been proposed (for example, see Patent Document 1).

JP-A-11-72512

  In the case of a contact electrode having a complicated shape, an advanced fine processing technique is required, and assembly requires skill. As a result, maintenance was poor and the unit price was high. In addition, in the case of a contact electrode using a plurality of Au balls, there is a problem that the contact area is reduced because the Au ball is in point contact with the electrode, and the electrical conductivity and thermal conductivity are poor.

  The present invention has been made to solve the above-described problems, and its purpose is to obtain a contact electrode and a contactor with good maintainability, low unit cost, and good electrical conductivity and thermal conductivity. .

The contactor according to the present invention includes a first cylindrical conductor having a first side surface, a first contact surface oblique to the first side surface, and a first end surface perpendicular to the first side surface; The first contact of the first cylindrical conductor has a side surface, a second contact surface oblique to the second side surface, and a second end surface perpendicular to the first side surface. A second cylindrical conductor in contact with the surface; and a cylindrical elastic body having elasticity and accommodating the first and second cylindrical conductors , wherein the first cylindrical conductor is divided vertically. The first contact surface of the first cylindrical conductor has a concave shape, and the second contact surface of the second cylindrical conductor has a convex shape .

  According to the present invention, a contact electrode and a contactor having good maintainability, low unit cost, and good electrical conductivity and thermal conductivity are obtained.

It is a cross-sectional perspective view which shows the contactor which concerns on Embodiment 1 of this invention. It is a top view which shows the contact electrode which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the contact electrode which concerns on Embodiment 1 of this invention. It is a top view which shows the state in which force was applied to the contact electrode which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the state in which force was applied to the contact electrode which concerns on Embodiment 1 of this invention. It is a top view which shows the contact electrode which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the contact electrode which concerns on Embodiment 2 of this invention. It is a top view which shows the modification of the contact electrode which concerns on Embodiment 2 of this invention. It is a top view which shows the modification of the contact electrode which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the contact electrode which concerns on Embodiment 3 of this invention. It is a top view which shows the contactor which concerns on Embodiment 4 of this invention.

  A contact electrode and a contactor according to an embodiment of the present invention will be described with reference to the drawings. The same or corresponding components are denoted by the same reference numerals, and repeated description may be omitted.

Embodiment 1 FIG.
1 is a cross-sectional perspective view showing a contactor according to Embodiment 1 of the present invention. A contactor 1 is installed between the circuit board 2 and the device 3. The contactor 1 has a plurality of contact electrodes 4 and an insulating housing 5 for holding them. The electrode 6 of the circuit board 2 and the electrode 7 of the device 3 are electrically connected through the contact electrode 4.

  FIG. 2 is a top view showing the contact electrode according to Embodiment 1 of the present invention, and FIG. 3 is a cross-sectional view thereof. The columnar conductor 8 has a side surface 8a, a contact surface 8b oblique to the side surface 8a, and an end surface 8c perpendicular to the side surface 8a. The columnar conductor 9 has a side surface 9a, a contact surface 9b oblique to the side surface 9a, and an end surface 9c perpendicular to the side surface 9a. The angle of the contact surface 8b of the cylindrical conductor 8 with respect to the side surface 8a is the same as the angle of the contact surface 9b of the cylindrical conductor 9 with respect to the side surface 9a.

  The contact surface 9 b of the cylindrical conductor 9 is in contact with the contact surface 8 b of the cylindrical conductor 8. In this state, the hollow cylindrical elastic body 10 having elasticity accommodates the cylindrical conductors 8 and 9. The material of the cylindrical elastic body 10 is an elastic body such as rubber. The inner wall of the cylindrical elastic body 10 is in contact with the side surfaces 8 a and 9 a of the columnar conductors 8 and 9. Part of the columnar conductors 8 and 9 protrudes from the cylindrical elastic body 10.

  The insulating housing 5 holds the plurality of contact electrodes 4 while maintaining the elasticity of the cylindrical elastic body 10. The position where the housing 5 holds the contact electrode 4 can be arbitrarily determined according to the position of the electrode 6 of the circuit board 2 or the electrode 7 of the device 3. Note that the housing 5 only holds the contact electrode 4, and one or all of the contact electrodes 4 can be attached or detached depending on the use situation or application.

  Subsequently, the operation will be described. FIG. 4 is a top view showing a state in which a force is applied to the contact electrode according to Embodiment 1 of the present invention, and FIG. 5 is a cross-sectional view thereof. When the contactor 1 is sandwiched between the circuit board 2 and the device 3, pressure is applied to the contact electrode 4 from above and below. Then, as shown in FIGS. 4 and 5, the cylindrical conductor 8 and the cylindrical conductor 9 are laterally displaced while the contact surface 8b and the contact surface 9b rub against each other. The columnar conductor 9 is extended to the outside while being held. The height of the contact electrode 4 is lower than before the pressure is applied. Thereafter, when the pressure is weakened, the displacement between the cylindrical conductor 8 and the cylindrical conductor 9 is pushed back by the force shrinking inward of the cylindrical elastic body 10, and the state returns to the state of FIGS.

  Then, the effect of this Embodiment is demonstrated. In the present embodiment, the cylindrical conductors 8 and 9 have contact surfaces 8b and 9b that are inclined with respect to the side surfaces 8a and 9a. Therefore, when the contactor 1 electrically connects the electrode 6 of the device 3 and the electrode 7 of the circuit board 2, the cylindrical conductor 8 and the cylindrical conductor 9 are laterally moved while the contact surface 8 b and the contact surface 9 b rub against each other. To absorb pressure. Therefore, contact failure can be avoided and the influence on electrical characteristics due to contact can be suppressed.

  Moreover, the cylindrical elastic body 10 can be formed only by cutting a tube-shaped elastic body, and the cylindrical conductors 8 and 9 can also be formed only by cutting from a cylindrical conductive material. For this reason, processing is very easy, and the length can be arbitrarily changed. Therefore, many types of products can be created even during small-scale production. Moreover, since the structure is simple, assembly is also easy. As a result, the maintainability is excellent and the unit price is low.

  Further, since the end faces 8c and 9c of the cylindrical conductors 8 and 9 are perpendicular to the side faces 8a and 9a, they are in surface contact with the electrodes 6 and 7, respectively. Therefore, since the contact area can be increased, the electrical conductivity and thermal conductivity are good.

Embodiment 2. FIG.
6 is a top view showing a contact electrode according to Embodiment 2 of the present invention, and FIG. 7 is a cross-sectional view thereof. A columnar conductor 8 is vertically divided into two. The contact surface 8b of the columnar conductor 8 has a concave shape, and the contact surface 9b of the columnar conductor 9 has a convex shape.

  When pressure is applied to the contact electrode 4 from above and below, the divided columnar conductors 8 are displaced from the center to the outside and disperse the pressure. The cylindrical elastic body 10 extends outward while holding the columnar conductor 8 and the columnar conductor 9. Thereafter, when the pressure is weakened, the displacement between the cylindrical conductor 8 and the cylindrical conductor 9 is pushed back by the force shrinking inward of the cylindrical elastic body 10, and the original state is restored.

  8 and 9 are top views showing modifications of the contact electrode according to Embodiment 2 of the present invention. In FIG. 8, the columnar conductor 8 is vertically divided into three, and in FIG. 9, the columnar conductor 8 is vertically divided into four. Even in this case, the same effect as described above can be obtained.

Embodiment 3 FIG.
FIG. 10 is a sectional view showing a contact electrode according to Embodiment 3 of the present invention. In the present embodiment, the configuration of the columnar conductor 8 and the columnar conductor 9 is opposite to that of the second embodiment. That is, the columnar conductor 9 is divided vertically, the contact surface 9b of the columnar conductor 9 is concave, and the contact surface 8b of the columnar conductor 8 is convex. Even in this case, the same effect as in the second embodiment can be obtained.

Embodiment 4 FIG.
FIG. 11 is a top view showing a contactor according to Embodiment 4 of the present invention. The housing 5 has a tape shape and holds the plurality of contact electrodes 4 in a plurality of sets. A positioning hole 11 is provided in the vicinity of each set. As a result, the housing 5 is slid automatically or manually after the set of the plurality of contact electrodes 4 is used an arbitrary number of times, so that it can be easily replaced with a new set of the plurality of contact electrodes 4.

  In the first to third embodiments, the case where there are two columnar conductors has been described. However, the present invention is not limited to this, and the same effect can be obtained even when three or more columnar conductors are stacked.

  Further, the areas of the end faces 8c and 9c of the cylindrical conductors 8 and 9 depend on the diameter of the cylindrical conductive material before formation. Therefore, the contact area with the electrodes 6 and 7 can be changed simply by preparing an arbitrary columnar material.

DESCRIPTION OF SYMBOLS 1 Contactor 4 Contact electrode 5 Housing 8, 9 Cylindrical conductor 8a, 9a Side surface 8b, 9b Contact surface 8c, 9c End surface 10 Cylindrical elastic body 11 Positioning hole

Claims (3)

A first cylindrical conductor having a first side surface, a first contact surface oblique to the first side surface, and a first end surface perpendicular to the first side surface;
The second side surface has an oblique second contact surface with respect to the second side surface, and a second end surface perpendicular to the first side surface, and the second contact surface is the first side of the first cylindrical conductor. A second cylindrical conductor in contact with one contact surface;
A cylindrical elastic body having elasticity and accommodating the first and second cylindrical conductors;
The first cylindrical conductor is vertically divided;
The first contact surface of the first cylindrical conductor is concave;
The contact electrode, wherein the second contact surface of the second cylindrical conductor has a convex shape. A plurality of contact electrodes according to claim 1 ;
A contactor comprising: an insulating housing that holds the plurality of contact electrodes while maintaining elasticity of the cylindrical elastic body. 3. The contactor according to claim 2 , wherein the housing is in a tape shape, holds the plurality of contact electrodes in a plurality of sets, and has positioning holes in the vicinity of each set.

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