JP2995391B2 - Socket contact for PGA and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pin grid array (PGA) in which a large number of pins for external connection are arranged in a grid, such as an IC or LSI, and inserted into a pin guide hole. The present invention relates to a device for the structure of a socket contact used for a socket for obtaining an electrical connection with the outside by shifting in the horizontal direction.

[0002]

2. Description of the Related Art An external connection of a PGA of an IC or an LSI is made by using a PGA socket connector as shown in FIG. The PGA socket connector is a cover insulator 1 having a pin guide hole 12 corresponding to PGA.
3 and a base insulator 14 in which socket contacts corresponding to the respective pin guide holes are embedded. When a PGA (not shown) is inserted into the pin guide hole 12 and the lever 15 is turned down, the cover insulator 13 moves in the direction of the arrow. The pins move in parallel, and each pin comes into contact with each socket contact (contact) in the base insulator 14.

Therefore, the hole of the base insulator 14 is elongated in the moving direction of the cover insulator 13, and the socket contact (contact) is embedded near the moving direction of the cover insulator 13. FIG. 7 shows the lever 15
7 shows that the cover insulator 13 has been moved in the direction of the arrow in FIG.

As shown in FIG. 8, a socket contact (contact) used in such a PGA socket connector has two contact pieces which are sandwiched between left and right contact pieces when a pin is inserted. As shown in FIG. 9, a single contact piece and a contact with a pin on only one side are used. FIG. 11 is a cross-sectional view of a state in which the contact of FIG. 9 is embedded in the base insulator.

[0005] Then, the contact of FIG.
0 was punched out and bent in a U-shape at the bending line L. The advantage is that a stable double-sided contact with the pin is obtained. Further, the contact shown in FIG. 9 is obtained by punching a contact according to the plane shape from a leaf spring material. The advantage is that material removal (material utilization rate) from the leaf spring material is better than that of the contact in FIG.

[0006]

However, the contact of FIG. 8 has to be cut out as shown in FIG. 10 and therefore has a problem of poor material removal, and the contact of FIG. 9 has contact with a pin. However, there is a problem that contact stability is inferior to double-sided contact as shown in FIG.

An object of the present invention is to provide a contact which has both sides of contact and has good material removal, and a method of manufacturing the same in view of the above-mentioned problems of the prior art.

[0008]

The present invention has the following means in order to achieve the above object. A first invention is an invention of a method of manufacturing a contact, and a depth dimension of a contact piece from one side at a position lower than an upper side of one leaf spring material by a height dimension of a contact piece of the contact. Cuts along the cutting line that is lowered by the height of the arm along the shape that forms the arm of the contact, and moves the other side at the position where the cutting stops. Is bent along the line in the width direction, and then bent back to the original direction at a position where the dimension between the upper contact pieces becomes a predetermined size from the bent position to form a crank shape. A method of manufacturing a socket contact for a PGA, comprising a structure in which a pin into which two contact pieces are inserted is sandwiched.

In the above invention, the cutting along the cutting line and the bending at two points may be performed by a shearing press.

A second invention is a socket contact for PGA manufactured by the above manufacturing method, wherein one leaf spring material is cut into two contact portions at a portion above a base, and The contact extends on an extension of the same plane as the base of the leaf spring material, and the other contact is bent into a crank shape at the height of the cutting dead end, and the upper contact piece of the one contact is A PGA socket contact having a structure facing a contact piece at a predetermined interval.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A feature of the present invention is that, as shown in FIG. 10, the material forming of the conventional contact is such that the left and right contact portions are formed at intervals corresponding to the interval between the contacts into which the pins are inserted. In the case of the present invention, both sides form left and right contacts, respectively, on the boundary of a cutting line that requires almost no width. The pin insertion interval is formed by bending the material on the convex side of the cutting line into a crank shape. Thereby, there is an advantage that the utilization rate of material removal of the two-contact socket contact from the leaf spring material is improved as compared with the related art.

Therefore, there are various embodiments satisfying such basic requirements. First of all, the cutting line is processed. There are a method in which a slit is formed in advance with a cutter or the like, and a method in which shearing is performed with a shearing machine. In the former case, crank bending will be performed after slitting,
In the latter case, the shearing and crank bending are performed once.

Further, the shape of the arm portion of the contactor and the shape of the contact piece can take various shapes, and the direction of inserting the pin into the contact piece can be either horizontal or front to crank bending. Since it is conceivable, a shape in which a pin is guided (a shape in which a tip portion is slightly curved) in accordance with the direction is conceivable.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a flat material obtained by press-cutting a leaf spring material, in which a slit 1 is formed. The slit 1 is located at a position lower than the upper side of the flat material by the height of the contact piece 2 and advances leftward from the right side by the depth of the contact piece 2 to form the arms 4 and 5 downward from there. It has stopped down by its height. At the height position, the surface portion on the opposite side to the side where the slit began to be formed, that is, the arm portion 5 is bent to the near side of the paper surface, and from the bent position to the near side, the contact piece 2
And 3 are bent so as to rise in the original direction again at a position having a size such that the distance between them becomes a predetermined distance in relation to the diameter of the insertion pin. That is, it is bent into a crank shape. Then, the structure shown in FIG. 2 is obtained.

The PGA pin 10 is inserted between the contact pieces 2 and 3 when it moves in the direction of the arrow. Contact pieces 2 and 3
Before the pin 10 is inserted, the interval between them is set to be slightly smaller than the diameter of the pin 10, and when the pin 10 is pushed in, the pin is pinched with a constant force by the spring action of the arms 4 and 5. . Reference numeral 9 denotes a rib pressed by a press in order to impart strength to the soldering terminal 7. Reference numeral 8 denotes a holding portion for fixing when the contact thus obtained is mounted on the base insulator 14. This bites into the wall of the contact mounting hole of the base insulator 14 and the contact is fixed. The contact pieces 2 and 3 are pins 1
When the 0 is inserted, the pin 10 is slightly warped outward so as to perform the operation reliably and smoothly.

FIG. 3 shows a state in which the contact of FIG. 2 is mounted on a socket connector for PGA, and a pin 10 of an LSI 17 having PGA is mounted.
FIG. 5 is a cross-sectional view when the cover is inserted into a pin guide hole of a cover insulator. The contact 18 is held and fixed by the holding portion 8 biting into the inner wall of the contact mounting hole 19 of the base insulator 14.

FIG. 3 shows a state where the lever 15 of the PGA socket connector (FIG. 6) is not yet tilted and the pin 1
Reference numeral 0 denotes a state in which the contact pieces 2 and 3 are not inserted between the contact pieces 2 and 3. When the lever 15 is tilted as shown in FIG. Will be inserted between.

FIG. 4 shows a support piece 11 provided behind (to the left of) the contact piece 2 of FIG. This is because, when the support piece 11 is bent 90 degrees toward the opposite side of the paper surface and mounted in the contact mounting hole 19 of the base insulator 14, the tip of the bent support piece 11 contacts the inner wall of the contact mounting hole 19 as shown in FIG. It is to make it.

By doing so, when bending the crank, the interval between the contact pieces 2 and 3 is set narrower, that is, the pin 10
What was folded so that it became tight against insertion of
When the support piece 11 abuts on the inner wall, the contact pieces 2 and 3 act in a slightly opening direction. By doing so, the lug when the pin 10 is inserted is improved, the buckling of the pin contact is eliminated, and the insertion force is reduced.

[0020]

As described above, according to the method of manufacturing a socket contact for PGA of the present invention, the cutting line for separating the left and right contact pieces and the left and right arm portions while leaving the base on one leaf spring material. After setting, cutting along this cutting line, and bending the rear arm as seen from the pin insertion side into a crank shape to obtain a contact pin sandwiching the pin between two contact pieces, When shaping from a spring material, material removal (material utilization rate) is higher and cost is reduced as compared to the case where a symmetrical contact piece and arm are formed with a pin-to-pin spacing as in the conventional case. There is an advantage that it becomes possible.

[Brief description of the drawings]

FIG. 1 is a view showing a state in which a slit is formed in a flat material obtained by shaping from a leaf spring material by pressing in the method of the present invention.

FIG. 2 is a plan view of the flat contact members 2 and 3 of FIG.
FIG. 4 is a perspective view of a state in which a root portion of the is bent in a crank shape.

FIG. 3 is a cross-sectional view when the contact of FIG. 2 is mounted on a PGA socket connector, and pins of an LSI having PGA are inserted into pin guide holes of a cover insulator.

FIG. 4 is a plan view of a shaped flat member provided with a support piece behind (leftward) a contact piece 2 of FIG. 1;

FIG. 5 is a cross-sectional view of the flat support piece 11 of FIG.
The contact pieces 2 and 3 are warped, the base of the arm 5 is bent into a crank shape, and the arm is attached to the contact mounting hole of the base insulator, and the tip of the support piece 11 contacts the inner wall of the contact mounting hole. It is a perspective view of the state made to be made.

FIG. 6 is a perspective view of the PGA socket connector in a non-contact state.

FIG. 7 is a perspective view of a contact state of the socket connector for PGA.

FIG. 8 is a perspective view of a conventional two-contact piece type contact.

FIG. 9 is a perspective view of a conventional one-contact piece type contact.

FIG. 10 is a plan view of a shaped flat member of the two-contact piece type contact of FIG. 8;

11 shows a state in which the one-contact-type contact of FIG. 9 is mounted on a PGA socket connector, a PGA pin is inserted into a pin guide hole of a cover insulator, and then the lever is depressed to bring the pin into contact with the contact piece. It is sectional drawing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slit 2 Contact piece 3 Contact piece 4 Arm part 5 Arm part 6 Base part 7 Soldering terminal 8 Holding part 9 Rib 10 Pin 11 Support piece 12 Pin guide hole 13 Cover insulator 14 Base insulator 15 Lever 17 LSI 18 Contact element 19 Contact element Mounting hole

Claims (3)

(57) [Claims] 1. An arm of a contact which advances inward from one side by the depth of the contact piece at a position which is lower than the upper side of one leaf spring material by the height of the contact piece of the contact and moves downward therefrom. Cut along the cutting line that is lowered by the height of the arm along the shape that forms the part, and bend the other side edge along the width direction line at the position where the cut stops A structure in which a pin into which two upper contact pieces are inserted is formed by folding back in the original direction at a position where the dimension between the upper contact pieces becomes a predetermined size from the bent position to form a crank shape. A method for manufacturing a socket contact for PGA. 2. A cutting machine according to claim 1, wherein cutting along the cutting line and bending at two points are performed by a shearing press.
A method for manufacturing the socket contact for PGA according to the above. 3. A single leaf spring material is provided at a portion above the base portion.
One contact part is extended on the same plane as the base of the leaf spring material, and the other contact is bent in a crank shape at the dead end of the cut. A PGA socket contact, wherein the upper contact piece faces the contact piece of the one contact at a predetermined interval.