KR20030061329A - electrical connector - Google Patents

Abstract

In the board mounting type electrical connector, it is suitable for high frequency transmission, has a small mounting area, and makes it possible to arrange contacts with high density.

The electrical connectors 1, 100 have insulated housings 3, 10 and contacts 8, 108 implanted therein, respectively. The lower ends of the tine portions of the contacts 8 and 108 respectively penetrate into the electrically conductive elastomers 20 and 120 and are electrically connected. When the electrical connectors 1 and 100 are mounted on the substrate, the conductive elastomers 20 and 120 contact the conductive pads of the substrate, and the contacts 8 and 108 and the substrate respectively pass through the conductive elastomers 20 and 120, respectively. Electrically connected.

Description

Electrical connector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to substrate mount electrical connectors, and more particularly to substrate mount electrical connectors suitable for high frequency transmission.

Background Art Conventionally, zero insertion force connectors combined with each other disclosed in, for example, Japanese Unexamined Patent Application, First Publication No. 2000-30815 have been known. This board-mount type electrical connector has terminals that are spring-loaded to the conductive pads of the substrate to elastically contact and are not soldered to the substrate. The tines of the terminals, i.e., the portions in contact with the conductive pads of the substrate, are elongated in size so as to obtain elasticity.

In addition, electrical connectors having terminals permanently soldered to a substrate are also known in the art as surface mount (SMT) connectors or through-hole connectors. The terminals of the surface mount connector have tines that are soldered directly to the conductive pads formed on the surface substrate. In addition, the through-hole type electrical connector terminal has a tin that is inserted into the through-hole (through hole) of the substrate and soldered directly.

In recent years, CPUs (central processing units) used in PCs have become high performance, and transmission frequencies (clock frequencies) have become high frequencies of 1.5 to 3 GHz. Electrical connectors used in transmission paths are also required to be capable of high speed transmission corresponding thereto. In the electrical connector having the spring-loaded terminal described above, the electric field including the terminal is long and cannot cope with high-speed transmission.

In the latter prior art, that is, the surface mount connector and the through-hole connector, soldering is required and the work process is increased. Moreover, in the surface mount type connector, the tines to be soldered in order to be able to check whether soldering has been properly performed need to be arranged outside the outline of the external shape of the electrical connector to check the soldering portion from the outside. Therefore, the mounting area of the electrical connector is required to be larger than the external shape of the connector as the soldering part, thereby increasing the mounting area of the electrical connector. The importance of this is increasing because electronic devices are becoming smaller and the area for mounting electrical connectors tends to be narrower.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an electrical connector which has a small mounting area suitable for high frequency transmission and can also arrange contacts at a high density.

BRIEF DESCRIPTION OF THE DRAWINGS The front view before fitting of the electrical connector of 1st Embodiment of this invention, and the electrical connector of 2nd Embodiment.

FIG. 2 is a cross-sectional view of the electrical connector of FIG. 1 before fitting along line A-A. FIG.

3 is a perspective view, as viewed obliquely from above, of the electrical connector of FIG. 1;

FIG. 4 is a perspective view as viewed obliquely downward of the electrical connector of FIG. 1; FIG.

Fig. 5 is a perspective view showing the male connector of the first embodiment and the female connector of the second embodiment together with the substrate;

Fig. 6 is a cross-sectional view showing the electrical connector of the third embodiment of the present invention together with the electrical connector of the other party, wherein (a) is a cross-sectional view taken along the portion of the short contact among the contacts arranged alternately, and (b) is a long contact. Sectional drawing along the part of is shown, respectively.

The perspective view which showed the state before attaching the electrical connector of 3rd Embodiment to a board | substrate with a board | substrate and a counterpart connector.

* Brief description of the major reference numerals

1, 100, 200 electrical connectors

3, 102, 202 Insulated Housing

8, 108, 208 Electrical Contacts

12, 112, 212 substrate

20, 120, 220 conductive elastomer

22, 122, 222 Insulation Sheet

36, 136, 236 Mounting member

112b, 212a conductive pads

The electrical connector of the present invention is an electrical connector mounted on a substrate on which a conductive pad having at least one electrical connector and an insulating housing holding the electrical connector is formed, the insulating housing having a mounting member for attaching the insulating housing to the substrate. And at the same time having a particulate conductive elastomer connected to the contact at a position corresponding to the conductive pad on the bottom of the insulating housing, and when the insulating housing is mounted on the substrate, the electrical contact corresponds to the conductive pad through the conductive elastomer. It is characterized in that it is configured to be electrically connected to.

The particulate conductive elastomer is preferably configured to be held by an insulating sheet attached to the insulating housing.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of the electrical connector of this invention (henceforth simply a connector) is described in detail with reference to an accompanying drawing.

Fig. 1 is a front view before fitting of two types of connectors of the present invention, that is, the connector of the first embodiment and the connector 100 of the second embodiment, and Fig. 2 is a fitting along the line AA of both connectors of Fig. 1. 3 is a perspective view of both connectors of FIG. 1 viewed obliquely from above, and FIG. 4 is a perspective view of both connectors of FIG. 1 viewed obliquely from below.

Hereinafter, a description will be given with reference to FIG. 1 to FIG. 4.

The connector shows two kinds of male connector 1 and female connector 100 which can be combined with each other. First, the male connector 1 of 1st Embodiment is demonstrated. The male connector 1 has a rectangular insulating base housing 2 and an insulating guide housing 4 in combination with the base housing 2. The insulating housing 3 of the male connector 1 is constituted from these base housings 2 and the insulating guide housings 4. The base housing 2 and the guide housing 4 have mounting surfaces 14 and 15 respectively attached to the substrate 12 (FIG. 5) described later. These mounting surfaces 14 and 15 are made to coincide with each other. The base housing 2 has convex portions 6 (FIG. 2) in the central portion opposite the mounting surface 14 along its longitudinal direction.

In the convex portion 6 of the base housing 2, an electrical contact (hereinafter simply referred to as a contact) 8 having a curved portion 10 near its tip, as best seen in FIG. 2, moves the curved portion 10 outward. Installed in two rows. The contact 8 is provided in the base housing 2 by insert molding or press fitting. In the mounting surface 14 of the base housing 2, a narrow and flat recessed part 16 (FIG. 2) is formed in the position corresponding to the convex part 6. As shown in FIG.

The recessed portion 16 is formed with a groove 18 deeper than the recessed portion 16 at a position corresponding to the contact 8. On both sides of the base housing 2, three pairs of holes 37 are inserted into the bolt 36 to be described later along the longitudinal direction.

As best shown in FIG. 2, the end portion of the side embedded in the contact 8, that is, the base housing 2, is provided to protrude into the groove 18. In each of the above-described recessed portions 16, particulate conductive elastomers 20 serving as connection members for electrically connecting the contacts 8 and the substrate 12 are disposed. Each electroconductive elastomer 20 has shown the shape which combined two large cones. In this embodiment, the diameter of the largest center part of the electroconductive elastomer 20 is formed in 0.8 mm. These conductive elastomers 20 are held in the polyimide sheet (insulation sheet) 22 and are configured as the subassembly 21. Each conductive elastomer 20 is disposed in the subassembly 21 corresponding to each contact 8.

The polyimide sheet 22 is disposed in the above-described recessed part 16 and mounted to the base housing 2 by, for example, thermocompression bonding. The conductive elastomers 20 are disposed in the grooves 18, respectively. When the conductive elastomer 20 is mounted on the base housing 2, a part thereof protrudes from the mounting surface 14 of the base housing 2. The tines 8a of the contacts 8 penetrate and contact the conductive elastomer 20, and electrical contact is made between the contacts 8 and the conductive elastomer 20. The conductive elastomer 20 is compressed and deformed at the time of attaching the substrate, but the groove 18 is set to a slightly larger dimension than the conductive elastomer 20 to absorb the strain.

The guide housing 4 is a rectangular member having the same width as the base housing 2 and having a dimension longer than that of the base housing 2. The guide housing 4 has an accommodating portion 24 for accommodating the base housing 2 on the rear side, and a contact holding portion 26 for holding the contact 8 on the front side and the guide plate 28 integrally. Have The contact holding part 26 has a contact holding groove 30 for positioning and holding the contact 8 in correspondence with the contact 8. Further, among the contact holding grooves 30 shown in FIGS. 1, 2, 3, and 4, the contact 8 is disposed only in a part of the contact holding grooves 30, and the contacts arranged in the other contact holding grooves 30. (8) is omitted. At the tip of the contact holder 26, a contact protector 27 is formed to cover the tip 8b (FIG. 2) of the contact 8 in two rows.

The guide plate 28 mentioned above is spaced apart from the contact holding part 26 at both sides of the contact holding part 26 in the longitudinal direction, and integrally protrudes with the guide housing 4. The inclined surface 28a is formed in the front-end | tip of the guide plate 28, and guides at the time of fitting with the female connector 100 mentioned later. On both sides of the base 32 of the guide housing 4, three holes 34 are formed respectively corresponding to the above-described holes 37 of the base housing 2. When the base housing 2 and the guide housing 4 are combined, bolts (mounting members) 36 are inserted into these holes 34 and screwed to the substrate 12 by the bolts 36 and nuts (not shown). Is locked.

When the male connector 1 is mounted on the substrate 12, the conductive elastomer 20 is in close contact with the conductive pad (not shown) of the substrate 12 and electrically connected to the substrate 12. In other words, the contact 8 is electrically connected to the conductive pad of the substrate 12 via the conductive elastomer 20. Since many electroconductive elastomers 20 need to be pressed against the board | substrate 12, the insulating housing 3 is attached to the board | substrate 12 by the above-mentioned metal bolt 36 and a nut with a large holding force. These bolts 36 may be metal rivets.

Next, the female connector 100 of 2nd Embodiment is demonstrated with reference to FIGS. The female connector 100 consists of an elongated rectangular insulating housing 102 and a contact 108 held in the housing 102. The housing 102 has a guide plate at a position spaced apart from the elongated fitting recess 126 for receiving the contact holding portion 26 of the male connector 1 and the fitting recess 126 on both sides of the fitting recess 126. 28 has a pair of guide holes 128 (FIG. 3) formed correspondingly. The guide hole 128 cooperates with the guide plate 28 to guide the male connector 1 to fit the female connector 100 smoothly.

The contact 108 is mounted by insert molding or press-fitting into the groove 130 extending in the insertion direction of the male connector 1 formed in the inner wall 129 of the fitting recess 126. (FIGS. 2 and 3) In the mounting surface 114 of the substrate 112 (FIG. 5) of the 102, similarly to the case of the base housing 2 of the male connector 1, the recesses 116 are formed in two rows. This recessed part 116 is formed in the shape of the frame which is connected in the both ends, and encloses the rivet 136 mentioned later. The recess 116 is provided with the same groove 118 as the above-described groove 18 at a position corresponding to the contact 108. Each of these recesses 116 and the groove 118 is provided with a polyimide (insulation sheet) 122 and a particulate conductive elastomer 120 held therein.

The groove 118 is formed slightly larger than the size of the conductive elastomer 120 for the same reason as in the case of the first embodiment. The polyimide sheet 122 has a shape in which an elongated sheet for holding a single row of conductive elastomers 120 is integrally connected at both ends, and the subassembly 121 is formed by holding the conductive elastomers 120. 2 and 4, the subassembly 121 facilitates the attachment of the conductive elastomer 120 to the insulating housing 102.

These conductive elastomers 120 also protrude from the mounting surface 114 of the housing 102 after mounting. Five unshown holes are formed in the bottom wall 150 of the fitting recess 126 along the longitudinal direction of the housing 102, and a rivet (mounting member) 136 is inserted through the metal plate 152 through the bottom wall 150 of the fitting recess 126. It is. The female connector 100 is fixed to the substrate 112 by these rivets 136. The metal plate 152 may have a washer, but a shape extending in the longitudinal direction to insert the plurality of rivets 136 is preferable since the tightening force at the time of mounting prevents deformation of the insulating housing 102. The action of the conductive elastomer 120 when the female connector 100 is attached to the substrate 112 is the same as that of the first embodiment, and thus detailed description thereof will be omitted. The rivet 136 may also be used as a bolt.

The male connector 1 of 1st Embodiment demonstrated above and the female connector 100 of 2nd Embodiment are shown in perspective with FIG. 5 with a board | substrate. As shown in FIG. 5, the male connector 1 is mounted on the upper substrate 12. The board | substrate 12 is provided with two rows of through-holes 12a through which bolts 36 are mounted. In addition, the female connector 100 is mounted on the lower substrate 112. The substrate 112 is provided with one row of through-holes 112a through which the rivets 136 are inserted. It is shown that both sides of the through hole 112a are arranged with a plurality of conductive pads 112b according to the rows of the through holes 112a, that is, corresponding to the contacts 108. When the female connector 100 is mounted on the substrate 112, each of the conductive elastomers 120 is pressed against and contacts their corresponding conductive pads 112b.

Next, the connector 200 of 3rd Embodiment of this invention is demonstrated with reference to FIG. 6 and FIG. Fig. 6 is a cross-sectional view showing the connector 200 of the third embodiment together with the counterpart connector, wherein (a) is a cross-sectional view taken along the portion of the short contact among the contacts arranged alternately, and (b) is taken along the portion of the long contact. Sectional drawing is shown, respectively. 7 is a perspective view which shows the state before attaching the connector 200 to a board | substrate with a board | substrate and a counterpart connector.

The connector 200 is a female connector similar to the connector 100 described in the second embodiment, and the same components will be described with the corresponding reference numerals. Connector 200 has a rectangular insulating housing 202 and a contact 208. The contact 208 is disposed in the groove 230 formed in the inner wall 229 (FIG. 7) of the fitting recess 206 of the housing 202 as in the second embodiment. The contact 208 is composed of a contact 208a having a short dimension in the insertion direction of the connector 200 and a long contact 208b.

The contacts 208a and 208b are arranged alternately, and the tine lower end portion 209a of the contact 208a is bent inward substantially at right angles as shown in Fig. 6 (a) and the tine lower end portion of the contact 208b. 209b is bent substantially perpendicularly outward as shown to FIG. 6 (b). Further, the tip portion 211a bent to the outside of the contact 208a is located inward from the fitting surface 213 of the housing 202, and the tip portion 211b bent to the outside of the contact 208b is to the fitting surface 213. Reached.

By changing the lengths of the contacts 208 and changing the positions of the tip portions 211a and 211b as described above, the contact pressure caused by the contact between the contacts at the time of fitting with the mating connector 300 reaches a large peak at a time, thereby increasing the fitting force. It is to prevent that. That is, it is for lowering the fitting force at the time of fitting by shifting the peak point of the contact pressure at the time of fitting. An end portion 255 is formed on the mounting surface 214 of the housing 202 along the rows of the contacts 208. The subassembly 221 is constituted by the polyimide (insulation sheet) 222 holding the particulate conductive elastomer 120 at positions corresponding to the lower ends 209a and 209b of the contacts 208a and 208b, respectively. do. The subassembly 221 is disposed at the end portion 255 described above.

When the conductive elastomer 220 is mounted on the housing 202, the conductive elastomer 220 contacts the lower ends 209a and 209b of the corresponding contact 208, and at the same time, a part of the conductive elastomer 120 is attached to the mounting surface 214. It protrudes, ie, protrudes toward the substrate 212 side. In addition, since the rivet (mounting member) 236 and the metal plate 252 are the same as that of 2nd Embodiment, description is abbreviate | omitted.

7 clearly shows that the conductive pads 212a on the side of the substrate 212 connected to the contacts 208 are arranged in the shape of a bird's-eye in correspondence with the lower end portions 209a and 209b of the contacts 208. . This arrangement prevents the lower end portions 209a and 209b from coming into contact with each other because the lower end portions 209a and 209b of the adjacent contacts 208 are reversed. Thereby, the pitch of the contact 208 along a longitudinal direction can be made into narrow pitch of 0.8 mm, for example. In addition, since the lower end portions 209a and 209b of horizontally bent contacts the conductive elastomer 220, the contact area can be secured relatively large, thereby improving contact reliability and reducing damage to the compressed conductive elastomer. Can be.

In addition, the conductive elastomers 20, 120, and 220 used in the connectors 1, 100, and 200 of the present invention are held by the polyimide sheets 22, 122, and 222, respectively. The mer can be used alone. For example, a particulate conductive elastomer may be embedded so as to form a groove at a position corresponding to the contact on the bottom surface of the insulating housing and to contact the contact in the groove.

Next, the counterpart connector 300 fitting with the connector 200 will be briefly described. The connector 300 has a base housing 302 in which the contact 308 is implanted and a guide housing 304 in which the base housing 302 is accommodated. The guide housing 304 has a mounting angle 357 for attaching to the substrate 312, a contact holding portion 326 and a guide plate 328 similar to those of the first embodiment. The board | substrate 312 is arrange | positioned between opposing mounting angles 357 as shown in FIG. 7, and is fixed by the bolt and nut which are not shown in figure. At that time, the contact 308 is soldered and fixed to the conductive pad 312a of the substrate 312.

The electrical connector of the present invention has a mounting member for attaching the insulating housing to the substrate, and has a particulate conductive elastomer connected to the contact at a position corresponding to the conductive pad on the bottom of the insulating housing. Since it is comprised so that it may electrically connect with the corresponding electrically conductive pad through an electroconductive elastomer, the following effects are exhibited.

Since the electrical connector does not need to solder the contact to the board, the number of steps for mounting on the board is reduced, and the housing and the contact due to heating during soldering do not deteriorate. In addition, since there is no need to check the soldering portion, there is no need to secure an area for mounting from the outside of the connector to the outside, and the mounting area can be made small. In addition, since a soldering part that requires a certain area on the substrate is unnecessary, the contact can be disposed at a high density. Moreover, since soldering of contacts is unnecessary and can be arranged with short-size contacts, the electric field can be shortened, thereby obtaining an electrical connector suitable for high abacus transmission.

When the particulate conductive elastomer is held by the insulating sheet attached to the insulating housing, the assembly of the conductive elastomer to the electrical connector can be easily performed collectively.

Claims (2)

An electrical connector mounted on a substrate on which a conductive pad having at least one electrical connector and an insulating housing holding the electrical connector is formed, The insulating housing has a mounting member for attaching the insulating housing to the substrate, and at the bottom of the insulating housing has a particulate conductive elastomer connected to the contact at a position corresponding to the conductive pad, And the electrical contact is electrically connected to the corresponding conductive pad through the conductive elastomer when the insulating housing is mounted to the substrate. The method of claim 1, And said particulate conductive elastomer is held on an insulating sheet attached to said insulating housing.