JP3701738B2 - Electrical connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical connector, and more particularly to an electrical connector having a spring contact for connecting a printed circuit board and another printed circuit board.
[0002]
[Prior art]
As an electrical connector having a conventional spring contact, for example, one shown in FIG. 4 is known (see Japanese Patent Publication No. 6-85342).
In FIG. 4, the electrical connector 100 includes an insulating housing 110 and a plurality of spring contacts 120 attached and fixed to the insulating housing 100 in a row. The insulating housing 110 has a spring contact receiving groove (not shown) formed in a line along the transverse direction of the insulating housing 110, a mounting post mounting hole (not shown) intersecting the receiving groove, and a spring contact receiving. The spring contact 120 has a contact pad 121 received in the spring contact receiving groove of the insulating housing 110, and the mounting post mounting hole intersecting the contact pad 121. A mounting post 122 to be mounted and fixed, a spring arm 123 received in the slot 111 communicating with the contact pad 121, and an IC chip contact portion 124 protruding upward from an insulating housing 110 provided on the spring arm 123. Yes.
The electrical connector 100 having the contact spring 120 attached and fixed to the insulating housing 110 is attached to the printed circuit board 130 placed on the base 160 by an attachment peg 112 protruding from the lower surface of the insulating housing 110, The IC chip 140 fixed to the plastic holder 141 is inserted between the panel 150 and the IC chip contact portion 124 of the electrical connector 100. As a result, the contact pad 121 of the contact spring 120 in the electrical connector 100 comes into contact with the conductive path on the printed circuit board 130, and the IC chip contact portion 124 comes into elastic contact with the lower surface of the IC chip 140. The conductive path and the IC chip 140 are electrically connected.
[0003]
[Problems to be solved by the invention]
However, in this conventional electrical connector having spring contacts, since the spring contacts 120 are arranged in a row in the transverse direction of the insulating housing 110, the lower surface of the IC chip 140 fixed to the plastic holder 141 is When the IC chip contact portion 124 of the spring contact 120 protruding upward from the insulating housing 110 is contacted, the IC chip 140 is bent (warped).
[0004]
Accordingly, an object of the present invention, when the printed circuit board is in contact with the contact portion of the spring contact projecting upward from the insulating housing, to reduce the bending (warpage) occurring on the printed circuit board, the printed circuit board and the other It is an object of the present invention to provide an electrical connector having a spring contact for connecting to a printed circuit board.
[0005]
[Means for Solving the Problems]
An electrical connector according to the present invention includes an insulating housing having substantially rectangular four sides, and a plurality of spring contacts that have a contact portion protruding upward from an opening formed on the upper surface of the insulating housing and are fixedly attached to the insulating housing. And the plurality of spring contacts are arranged in rows along the four sides of the insulating housing, wherein each row of the spring contacts is offset to one side of each side of the four sides. are arranged so as to be point symmetry against the center of the insulating housing, in the center of the upper surface of the insulating housing and is characterized in that a base portion which projects slightly from the upper surface.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of the electrical connector of the present invention, FIG. 2 is a front view showing the relationship between the electrical connector of the present invention, a printed circuit board for mounting and a printed circuit board for contact, and FIG. 3 is a line 3-3 in FIG. FIG.
[0007]
In these drawings, the electrical connector 1 includes an insulating housing 10 and a plurality of spring contacts 20 attached and fixed to the insulating housing 10.
[0008]
The insulating housing 10 has a housing body 11 having a substantially rectangular four sides, on the lower surface of the housing main body 11, a plurality of spring contact base receiving groove 12 is formed. The plurality of spring contact base receiving grooves 12 are arranged along four sides of the housing body 11 so that each row is point-symmetrical with respect to the center of the offset housing body 11 on one side of each of the four sides. Is arranged. The pitch of the spring contact base receiving grooves 12 adjacent to each other is about 0.5 mm. The housing body 11 is formed with a mounting post mounting hole 14 and a spring portion receiving space 13 extending upward from the spring contact base receiving groove 12. An opening 15 communicating with the spring housing space 13 is formed on the upper surface of the housing body 11, and this opening 15 has a vertically long rectangular cross section so that a contact portion 25 of a spring contact 20 described later can freely move. ing. The arrangement of the openings 15 adjacent to each other is a staggered arrangement. Further, a base portion 16 with which the printed circuit board for contact 50 abuts is provided at the center of the housing body 11 in the left-right direction (left-right direction in FIG. 1) and the front-back direction (up-down direction in FIG. 1). The portion 16 protrudes slightly (about 0.1 mm) from the upper surface of the surrounding housing body 11. Accordingly, when the contact printed circuit board 50 abuts on the base portion 16, the step between the lower surface of the base material and the lower surface of the pattern caused by the thickness of the pattern on the printed circuit board 50 for contact and the thickness of solder plating, etc. Will be absorbed. A mounting screw through hole 17 for attaching the contact printed circuit board 50 to the electrical connector 1 is formed at the center of the base portion 16, and the contact printed circuit board 50 is positioned on the upper surface of the housing body 11. A plurality of positioning bosses 30 for projecting are provided.
[0009]
On the other hand, each spring contact 20 includes a base portion 21 received in each spring contact base receiving groove 12 of the insulating housing 10, a tine portion 22 extending outward from the base portion 21, and a base portion 21. A mounting post 23 having a protrusion 26 that extends upward and is fixed to each mounting post mounting hole 14 of the insulating housing 10, and extends upward from the base portion 21 and accommodated in each spring portion accommodating space 13 of the insulating housing 10. A corrugated (S-shaped) spring portion 24 and a contact portion 25 extending upward from the spring portion 24 and projecting upward from each opening 15 of the insulating housing 10, and punching a metal sheet (plate). Produced by. The spring portion 24 may have another shape instead of the S shape.
[0010]
Then, by inserting each base 21 of each of the plurality of spring contacts 20 into each spring contact base receiving groove 12 of the insulating housing 10 and fixing each mounting post 23 to each mounting post mounting hole 14, The electrical connector 1 is completed. At this time, the plurality of spring contacts 20 are arranged in rows along the four sides of the insulating housing 10, and each row is point-symmetric with respect to the center of the offset insulating housing 10 on one side of each side of the four sides. The contact portions 25 of the spring contacts 20 adjacent to each other are arranged in a staggered arrangement.
[0011]
Next, a method of mounting the above-described electrical connector 1 on the mounting printed circuit board 40 and connecting the contact printed circuit board 50 and the mounting printed circuit board 40 will be described with reference to FIGS. .
[0012]
First, the electrical connector 1 is mounted on the mounting printed circuit board 40, the contact pads 22 of the electrical connector 1 are soldered to the conductive paths on the mounting printed circuit board 40, and the electrical connector 1 is mounted on the mounting printed circuit board 40. Install on top.
Next, the positioning through holes 51 formed in the contact printed circuit board 50 are inserted into the positioning bosses 30 of the electrical connector 1 to position the contact printed circuit board 50 with respect to the electrical connector 1 and mounting screws (not shown). Are inserted into the through holes 52 formed in the contact printed circuit board 50, the mounting screw through holes 17 of the electrical connector 1, and the through holes 41 formed in the mounted printed circuit board 40. Tighten with a nut (not shown) from below the substrate 40. The nut may be insert-molded in the mounting printed circuit board 40. As a result, the contact printed circuit board 50 is fixed to the electrical connector 1, and the lower surface of the contact printed circuit board 50 abuts on the base portion 16, and the conductive path formed on the lower surface of the contact printed circuit board 50 is The elastic contact is made with the contact part 25 of the spring contact 20, and the conductive path of the mounting printed circuit board 40 is conducted. At this time, the spring contacts 20 are arranged in rows along the four sides of the insulating housing 10 so that each row is point-symmetric with respect to the offset insulating housing 10 on one side of each side of the four sides of the insulating housing 10. The printed circuit board 50 for contact comes into contact with the spring contact 20 of the electrical connector 1 in four vertical and horizontal directions, and is in contact with the case where the spring contacts are arranged in one vertical row or one horizontal row. The printed circuit board 50 can be bent (warped) with little space, and the spring contacts can be mounted at a high density with little space for the spring contacts, so that the electrical connector 1 has a compact and compact shape. Can be offered at. Further, since the contact portions 25 of the spring contacts 20 adjacent to each other are arranged in a staggered arrangement, the space where the spring contacts are not arranged is further reduced, and the spring contacts can be mounted on the insulating housing with high density. The base portion 16 of the electrical connector 1 is formed so as to protrude, and the step between the base material surface and the pattern surface of the contact printed circuit board 50 is in contact with the contact printed circuit board 50 on the base portion 16. Therefore, the bending (warping) of the printed circuit board 50 for contact is further reduced.
[0013]
【The invention's effect】
According to the first aspect of the present invention, the plurality of spring contacts are arranged in rows along the four sides of the insulating housing, and each row is pointed with respect to the center of the offset insulating housing on one side of each of the four sides. Since they are arranged symmetrically, when the printed circuit board for contact comes into contact with the contact portion protruding upward from the insulating housing, the printed circuit board for contact comes into contact with the contact portion of the spring contact in four directions. Thus, the printed circuit board can be bent (warped) less than the case where the spring contacts are arranged in one vertical row or one horizontal row, and the space of the insulating housing in which the spring contacts are not arranged is reduced. Fewer spring contacts can be mounted at high density, and the electrical connector can be provided in a compact and compact shape.
[Brief description of the drawings]
FIG. 1 is a plan view of an electrical connector of the present invention.
FIG. 2 is a front view showing a relationship among an electrical connector, a mounting printed circuit board, and a contact printed circuit board according to the present invention.
3 is a cross-sectional view taken along line 3-3 in FIG.
4A and 4B show a conventional electrical connector, wherein FIG. 4A is a plan view of the electrical connector, and FIG. 4B is a partial cross-sectional view of the electrical connector that is attached to a printed circuit board and arranged to read an IC chip.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electrical connector 10 Insulation housing 20 Spring contact 25 Contact part 40 Printed circuit board 50 for mounting Printed circuit board for contact

Claims (1)

An insulating housing having substantially rectangular four sides; and a plurality of spring contacts having a contact portion protruding upward from an opening formed on the upper surface of the insulating housing and fixedly attached to the insulating housing. In the electrical connector in which the contacts are arranged in a row along the four sides of the insulating housing ,
Wherein each column of spring contact is disposed so as to be point symmetry against the center of the insulating housing offset to one side of the four sides each side,
An electrical connector characterized in that a base portion slightly projecting from the upper surface is provided at the center of the upper surface of the insulating housing .

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