JP2009283182A - Electrical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress changes in the relative position of each conductor part in an electrical connector disposed between a pair of electronic apparatus. <P>SOLUTION: This electrical connector 1 is disposed between a pair of circuit boards to electrically connect them. The electrical connector 1 is equipped with a plurality of conductive elastic bodies 50 each of which has an elastic dielectric 51, a center conductor part 54 formed in the dielectric 51 in its thickness direction to electrically connect the front side of the dielectric 51 to its back side, and an outside conductor part 53 formed to surround the center conductor part 54 in the dielectric 51 while electrically connecting the front side of the dielectric 51 to its back side. A plurality of the conductive elastic bodies 50 are held by a frame 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrical connector that is disposed between a pair of electronic devices and connects them.

2. Description of the Related Art Conventionally, there is an electrical connector that is disposed between two electronic devices such as a circuit board and is electrically connected to the two electronic devices by being sandwiched between conductor portions provided on them. Patent Document 1 discloses, as one type of such an electrical connector, a sheet-like connector disposed between a probe card provided in a semiconductor wafer inspection apparatus and an inspection substrate (performance board in Patent Document 1). It is disclosed. This electrical connector includes an elastomer which is a rubber-like elastic body, and a conductor portion is formed in the elastomer in the thickness direction. Further, in this electrical connector, in order to achieve impedance matching of the transmission line, each conductor portion has a coaxial structure having a center conductor portion and an outer conductor portion surrounding the center conductor portion.
Japanese Utility Model Publication No. 5-55553

  However, in the electrical connector disclosed in Patent Document 1, since many conductor parts are formed in one elastic body, the position of each conductor part is easily shifted from a normal position corresponding to the terminal of the electronic device. There was a problem. That is, in order to form many conductor parts in one elastic body, it is necessary to increase the area of the elastic body. However, when the large elastic body is stretched by heat or external force, the change in size is significant compared to the small elastic body. Therefore, the relative positions of the conductor portions formed in the elastic body are also likely to change, and each conductor portion is likely to be displaced from the normal position.

  This invention is made | formed in view of the said subject, The objective is providing the electrical connector which can suppress the change of the relative position of each conductor part in the electrical connector arrange | positioned between a pair of electronic devices. It is in.

  In order to solve the above problems, an electrical connector according to the present invention is an electrical connector that is arranged between a pair of electronic devices and electrically connects them, and has an elastic dielectric, and the dielectric A central conductor portion that is formed in the thickness direction and that conducts between the front surface side and the back surface side of the dielectric, and that conducts between the front surface side and the back surface side of the dielectric, and the central conductor in the dielectric A plurality of conductive elastic bodies including an outer conductor portion formed so as to surround the portion, and a frame for holding each of the plurality of conductive elastic bodies.

  According to the present invention, since the plurality of conductive elastic bodies are respectively held by the frame, the change in the relative position of each conductive elastic body can be suppressed. As a result, it is possible to suppress changes in the relative positions of the central conductor portion and the outer conductor portion formed in the conductive elastic body and the central conductor portion and the outer conductor portion formed in another conductive elastic body.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an electrical connector 1 as an example of an embodiment of the present invention and circuit boards 100A and 100B electrically connected via the electrical connector 1. FIG. 2 is an enlarged perspective view of the electrical connector 1, and FIG. 3 is a cross-sectional view of the electrical connector 1 and the circuit boards 100A and 100B sandwiching the electrical connector 1 at the position indicated by the line III-III in FIG. . 4 is a perspective view of the conductive elastic body 50 included in the electrical connector 1, FIG. 5 is a side view of the conductive elastic body 50, and FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG. 7 is an enlarged perspective view of the frame 11 included in the electrical connector 1, and FIG. 8 is a cross-sectional view taken along line VIII-VIII shown in FIG. FIG. 9 is an enlarged plan view of the circuit board 100A for explaining an example of the conductor pattern of the circuit board 100A.

  The electrical connector 1 is a sheet-like electrical connector that is disposed between a pair of electronic devices and electrically connects them. In this description, the electrical connector 1 is disposed between circuit boards 100A and 100B, which are examples of electronic devices (see FIGS. 1 and 3). As shown in FIG. 2, the electronic connector 1 includes a plurality of conductive elastic bodies 50 that conduct between the front surface and the back surface, and a frame 11 that holds the plurality of conductive elastic bodies 50. The plurality of conductive elastic bodies 50 are arranged side by side on the same plane. The frame 11 holds a plurality of conductive elastic bodies 50 at positions corresponding to the conductor portions 101 of the circuit boards 100A and 100B.

  As shown in FIG. 4 or 6, the conductive elastic body 50 includes a conductor portion 52 and a dielectric 51. The dielectric 51 is formed in a disk shape by an elastic dielectric. For example, the dielectric 51 is made of rubber (for example, silicon rubber) or an elastomer that is a rubber-like elastic body. A recess 51 h is formed on the outer peripheral surface of the dielectric 51. The conductive elastic body 50 is held inside the holding hole 12 by fitting the convex part 12a formed on the inner peripheral surface of the holding hole 12 of the frame 11 into the concave part 51h (see FIG. 3). The frame 11 will be described in detail later.

  The electrical connector 1 is a high-speed transmission connector that transmits a high-frequency signal, and the conductor portion 52 of the conductive elastic body 50 has a coaxial structure in order to match the impedance of the transmission line. That is, the conductor 52 has a cylindrical center conductor 54 that is a signal conductor and a cylindrical outer conductor 53 that is a ground conductor. The center conductor portion 54 is formed in the dielectric 51 so as to face the thickness direction (Z1-Z2 direction), and conducts the front surface 51a side and the back surface 51b side of the dielectric 51. The outer conductor portion 53 is formed in the dielectric 51 so as to surround the center conductor portion 54. The outer conductor portion 53 is also formed so as to face the thickness direction of the dielectric 51, and the surface 51a side and the back surface 51b side of the dielectric 51 are electrically connected. The diameter of the outer conductor portion 53 is set according to the impedance of the electrical connector 1 that is required to achieve impedance matching of the transmission line between the circuit board 100A and the circuit board 100B. The dielectric 51 has a diameter corresponding to the outer conductor portion 53. Specifically, the outer diameter of the dielectric 51 is slightly larger than the outer diameter of the outer conductor portion 53. The dielectric 51 has outer peripheral portions 51j and 51k surrounding the outer conductor portion 53 and in contact with the outer peripheral surface, and the outer peripheral portions 51j and 51k are formed in a thin annular shape (see FIG. 6). In this description, one central conductor portion 54 and one outer conductor portion 53 are formed for one conductive elastic body 50.

  As shown in FIG. 6, the central conductor portion 54 and the outer conductor portion 53 are provided so as to penetrate the dielectric 51, and the end portions 54 a, 54 b, 53 a, and 53 b are the front surface 51 a and the back surface of the dielectric 51, respectively. It is exposed from 51b. In particular, in the conductive elastic body 50, the end portion 54 a of the center conductor portion 54 and the end portion 53 a of the outer conductor portion 53 are located above the surface 51 a of the dielectric 51, and the outer end portion 54 b of the center conductor portion 54 and the outer side. The end portion 53 b of the conductor portion 53 is located below the back surface 51 b of the dielectric 51. In addition, inner ring portions 51 d and 51 e surrounding the end portions 54 a and 54 b of the center conductor portion 54 are provided on the front surface 51 a and the back surface 51 b of the dielectric 51. Also, outer annular portions 51f and 51g are provided on the front surface 51a and the rear surface 51b of the dielectric 51 along the inner peripheral surfaces of the end portions 53a and 53b of the outer conductor portion 53.

  The electrical connector 1 is disposed between the circuit boards 100A and 100B, and the conductor portions 101 of the circuit boards 100A and 100B are pressed into contact with the conductive elastic bodies 50 (see FIG. 3). As shown in FIG. 9, in the example described here, the conductor pattern 101a for signal and the conductor patterns 101b, 101c, 101d for ground are formed on the surface of the circuit board 100A facing the electrical connector 1. Is provided. The conductor patterns 101a, 101b, 101c, and 101d form one set corresponding to one conductive elastic body 50. The conductor patterns 101b, 101c, and 101d are provided on a circumference having substantially the same diameter as the outer conductor portion 53, and the conductor pattern 101a is located on the inner side thereof. The conductor pattern 101a is pressed against the center conductor 54, and the conductor patterns 101c, 101d, and 101e are pressed against the outer conductor 53. A conductor pattern similar to that of the circuit board 100 </ b> A is also formed on the surface of the circuit board 100 </ b> B that faces the electrical connector 1, and each conductor pattern is in pressure contact with the central conductor portion 54 or the outer conductor portion 53. The conductor patterns 101a, 101b, 101c, and 101d shown in FIG. 9 are examples of conductor patterns, and other conductor patterns may be provided on the circuit board 100A.

  In addition, the center conductor part 54 and the outer side conductor part 53 are comprised by the metal filler (for example, particle | grains, such as nickel) which aligned in the thickness direction and continued with each other, for example. For example, the central conductor portion 54 and the outer conductor portion 53 formed of such a metal filler are mixed with a material that is a source of the dielectric 51 and then the thickness of the conductive elastic body 50 is reduced. It can be formed in the dielectric 51 by a known method such as alignment by a directional magnetic field.

  The frame 11 is formed in a rectangular plate shape by an insulating material having rigidity higher than that of the dielectric 51 such as resin (for example, plastic). As shown in FIG. 7, the frame 11 has a plurality of circular holding holes 12 formed therein. The inner diameter of the holding hole 12 corresponds to the outer diameter of the conductive elastic body 50, and each conductive elastic body 50 is held inside each holding hole 12. As a result, the relative positions of the plurality of conductive elastic bodies 50 are fixed (see FIG. 3). Here, irregularities are formed on the inner peripheral surface of the holding hole 12 and the outer peripheral surface of the dielectric 51, and the conductive elastic body 50 is held inside the holding hole 12 by fitting with each other. . That is, as shown in FIG. 7 or 8, a convex portion 12 a that protrudes toward the center side in the radial direction of the holding hole 12 is formed on the inner peripheral surface of the holding hole 12. The convex portion 12 a has an annular shape and is formed on the inner peripheral surface of the holding hole 12 in the circumferential direction of the holding hole 12. On the other hand, on the outer peripheral surface of the dielectric 51, as shown in FIG. 5 or FIG. 6, a recess 51h that is recessed toward the center in the radial direction is formed. The recess 51 h is also formed on the outer peripheral surface of the dielectric 51 in the circumferential direction of the dielectric 51. And as shown in FIG. 3, the electroconductive elastic body 50 is hold | maintained inside the holding hole 12 by the convex part 12a fitting in the recessed part 51h.

  The conductive elastic body 50 is fitted into the holding hole 12 by elastic deformation. That is, when the conductive elastic body 50 is fitted into the holding hole 12, the outer peripheral edge 51 i of the dielectric 51 is slightly shrunk to get over the convex portion 12 a of the holding hole 12, and then the outer peripheral edge 51 i is elastic. By returning, the conductive elastic body 50 is held inside the holding hole 12. The structure for holding the conductive elastic body 50 inside the holding hole 12 is not limited to this. For example, a concave portion is formed on the inner surface of the holding hole 12 and a convex portion is formed on the side surface of the dielectric 51. Good.

  The conductive elastic body 50 is formed thicker than the frame 11, and the end portion 54 a of the center conductor portion 54 and the end portion 53 a of the outer conductor portion 53 are located above the surface of the frame 11, respectively. The edge part 54b and the edge part 53b of the outer side conductor part 53 are each located below the back surface of the flame | frame 11 (refer FIG. 3).

  The conductive elastic body 50 is held by the frame 11 at a position corresponding to the conductor portion 101 of the circuit boards 100A and 100B. Here, as shown in FIG. 1 or FIG. 2, the plurality of conductive elastic bodies 50 are arranged to form a plurality of (here, four) rows (rows in the X1-X2 direction). Further, the plurality of conductive elastic bodies 50 are arranged in an oblique lattice shape, and each conductive elastic body 50 is inclined with respect to the conductive elastic bodies 50 in the adjacent rows (direction D in FIG. 2). ). That is, it passes through an intermediate position (position indicated by P in FIG. 2) between two adjacent conductive elastic bodies 50, 50 in the same row, and is adjacent to the direction perpendicular to the row (Y1-Y2 direction). The center of the row of conductive elastic bodies 50 is located.

  As shown in FIG. 7 or FIG. 8, a connecting portion 11 b that is thinner than other portions of the frame 11 is formed between two holding holes 12 that are located in the same row and adjacent to each other. Each holding hole 12 is partitioned from the adjacent holding hole 12 by a connecting portion 11b. As described above, the convex portion 12 a has an annular shape protruding inward on the inner peripheral surface of the holding hole 12. Moreover, in the example demonstrated here, the two holding holes 12 adjacent in the same row | line | column are arrange | positioned so that those outermost edges may contact | connect. A part of the convex portion 12 a of the two adjacent holding holes 12 serves as a connecting portion 11 b that partitions the two holding holes 12. Thereby, the plurality of holding holes 12 partitioned from each other can be arranged at positions as close as possible.

  Further, as shown in FIG. 1, the frame 11 includes a plurality (here, two) of fastening portions 13 and 13 that fix the circuit boards 100 </ b> A and 100 </ b> B to the frame 11. The fastening portions 13 and 13 are formed on the edge of the frame 11 and are positioned on the diagonal line of the frame 11. In this description, the fastening portion 13 is a rivet and has projecting portions 13a and 13b projecting upward and downward from the frame 11 (see FIG. 2 or FIG. 7). Holes 102A and 102A are formed in the circuit board 100A at positions corresponding to the fastening portions 13 and 13, and holes 102B and 102B are formed in the circuit board 100B at positions corresponding to the fastening portions 13 and 13. The protrusions 13a and 13b of the fastening portion 13 are fitted into these holes 102A and 102B. Then, the circuit boards 100A and 100B are respectively fixed to the electrical connector 1 by crimping the tops of the protrusions 13a and 13b in a state where the circuit boards 100A and 100B are pressed against the electrical connector 1 (see FIG. 3). . FIG. 3 shows a state after the top portions of the protruding portions 13a and 13b are caulked.

  As described above, the electrical connector 1 includes the dielectric 51 having elasticity, the center formed in the dielectric 51 in the thickness direction, and conducting between the surface 51a side and the back surface 51b side of the dielectric 51. A plurality of conductive elastic bodies including a conductor portion 54 and an outer conductor portion 53 formed so as to enclose the central conductor portion 54 in the dielectric 51 while conducting the front surface 51a side and the back surface 51b side of the dielectric 51. 50. Each conductive elastic body 50 is held by the frame 11. Thereby, the change of the relative position of each electroconductive elastic body 50 can be suppressed. As a result, the relative positions of the central conductor portion 54 and the outer conductor portion 53 formed in the conductive elastic body 50 and the central conductor portion 54 and the outer conductor portion 53 formed in another conductive elastic body 50 are different. Change can be suppressed.

  The frame 11 has a plate shape in which a plurality of holding holes 12 are formed, and the plurality of conductive elastic bodies 50 are respectively held inside the holding holes 12. Thereby, each conductive elastic body 50 can be held with a simple structure.

  The conductive elastic body 50 is fitted into the holding hole 12 of the frame 11 by elastic deformation. Thereby, the conductive elastic body 50 can be more reliably held inside the holding hole 12.

  Further, the frame 11 has fastening portions 13 and 13 for fixing a pair of electronic devices (here, the circuit boards 100A and 100B) to the frame 11. Thus, the circuit board 100A and the circuit board 100B can be connected by the electrical connector 1.

  In addition, this invention is not restricted to the electrical connector 1 demonstrated above, A various change is possible. For example, in the above description, one conductor portion 52 is formed in one dielectric 51. However, a plurality of conductor portions 52 may be formed in one dielectric 51, and a conductive elastic body having the plurality of conductor portions 52 may be held by a frame.

  Further, in the above description, the plurality of conductive elastic bodies 50 are held in an oblique lattice shape by the frame 11. However, the position of the conductive elastic body 50 is not limited to this, and may be appropriately changed according to the position of the conductor portion of the electronic device connected to the electrical connector 1.

  In the above description, a rivet is used as the fastening portion 13, but the fastening portion is not limited to this, and may be, for example, a bolt.

It is a disassembled perspective view of the electrical connector which is an example of embodiment of this invention, and the circuit board electrically connected via an electrical connector. It is an expansion perspective view of the said electrical connector. It is sectional drawing of the electrical connector 1 and the circuit board in the position shown to the III-III line shown in FIG. It is a perspective view of the electroconductive elastic body with which the said electrical connector is provided. It is a side view of the said conductive elastic body. It is sectional drawing of the VI-VI line shown in FIG. It is an expansion perspective view of the flame | frame with which the said electrical connector is provided. It is sectional drawing of the VIII-VIII line shown in FIG. It is an enlarged plan view of the circuit board for explaining an example of the conductor pattern of the circuit board.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Electrical connector, 11 Frame, 11b Connection part, 12 Holding hole, 12a Convex part, 13 Fastening part, 13a Protrusion part, 50 Conductive elastic body, 51 Dielectric, 51a Surface, 51b Back surface, 51d Inner ring part, 51f Outer side Annular part, 51h recessed part, 51i outer peripheral edge, 51j, 51k outer peripheral part, 52 conductor part, 53 outer conductor part, 53a end part, 53b end part, 54 central conductor part, 54a end part, 54b end part, 100A, 100B circuit Substrate (electronic device), 101 conductor portion, 101a, 101b, 101c, 101d conductor pattern, 102A, 102B hole.

Claims (4)

An electrical connector disposed between a pair of electronic devices and electrically connecting them,
An elastic dielectric, a central conductor formed in the dielectric in the thickness direction and conducting between the surface side and the back side of the dielectric, and conducting between the surface side and the back side of the dielectric And a plurality of conductive elastic bodies comprising an outer conductor portion formed so as to surround the central conductor portion in the dielectric,
A frame for holding each of the plurality of conductive elastic bodies;
An electrical connector comprising: The electrical connector according to claim 1,
The frame has a plate shape in which a plurality of holes are formed,
The plurality of conductive elastic bodies are respectively held inside the holes of the frame.
An electrical connector characterized by that. The electrical connector according to claim 2,
The conductive elastic body is fitted into the hole of the frame by elastic deformation.
An electrical connector characterized by that. The electrical connector according to claim 1,
The frame includes a fastening portion that fixes the pair of electronic devices to the frame.
An electrical connector characterized by that.

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