JPH0350634Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a structure of a socket suitable for use as a socket for, for example, a multi-pin type IC.

``Prior Art'' In a conventional IC socket, a pair of contact pieces 1 are arranged facing each other as shown in FIG. 2
A socket contact is used in which a pin 3 is inserted, the contact piece 1 is pushed apart by the insertion force of the pin 3, the pin 3 and the contact piece 1 are fitted, and a mutual contact state is maintained.

``Problem that the invention aims to solve'' According to the conventional IC socket, the pin 3 of the connected object 2 expands the opposing gap of the contact piece 1 and comes into contact with it, so the pin 3 is connected to the contact piece 1. When pushing and expanding the pins 3, an excessive force may be applied to the pins 3 and an accident may occur where the pins 3 become bent.

In particular, the number of pins is large when the connected object 2 has a structure in which hundreds of pins are implanted on one plate surface of a flat package, such as a PGA (pin clamped array) type IC. Therefore, it is necessary to reduce the diameter of the wire that constitutes the pin, which tends to increase the likelihood of bending accidents. Furthermore, even if the force applied to each pin is small when each pin is fitted into the contact piece 1 of the socket, the combined force is large, resulting in the disadvantage that unreasonable force is applied to the package during insertion.

"Means for solving the problem" In this invention, an insulating cover is inserted between the connected object and the contact, and the engaging means provided on the insulating cover pushes out the gap between the opposing pieces of the pair of contact pieces that make up the contact. state. The engaging means is activated by inserting the pin of the object to be connected into the opposing gap of the contact piece while the opposing gap of the contact piece is being pushed wide, and then moving the insulating cover away from the contact piece. The contact piece is disengaged from the engagement state, whereby the contact piece engages only the pin of the object to be connected and comes into contact.

As described above, according to this invention, the pin of the connected body is inserted into the opposing gap between the contact pieces with the opposing gap between the contact pieces being expanded by the insulating cover.
The pin of the object to be connected can be inserted into the opposing gap of the contact piece without resistance. Therefore, when applied to a multi-pin type IC, the pin can be inserted into the opposing gap portion of the contact piece without supporting the IC package with excessive force.

Further, when the contact piece is in contact with the pin of the object to be connected, contact pressure is applied to the pin by the spring force of the contact piece, so that the contact state is stably maintained.

"Embodiment" An embodiment of this invention is shown in FIGS. 1 to 11. In the figure, 100 is a socket contact, 200 is an insulating substrate that implants and supports this socket contact 100, 300 is an insulator that supports the contact pieces 101 of the socket contact 100 in a predetermined arrangement position, and 4
00 indicates an insulating cover that is a feature of this invention.

The insulating substrate 200 can be, for example, a printed wiring board, and the terminal portion 102 of the socket contact 100 is electrically connected to a wiring conductor formed on the printed wiring board by, for example, soldering or spot welding. Ru. Contact piece 101 of socket contact 100
is held by the insulator 300 at a position corresponding to the arrangement position of the pins 501 of the connected body 500 (see FIG. 5).

In other words, the insulator 300 is formed of a flat plate, and the plate surface is attached to the insulating substrate 200 with a predetermined gap maintained by the holding fittings 302. Insulator 3
00 has through holes 301 arranged in the same arrangement as the pin arrangement of the connected body 500, and the through holes 30
The contact piece 101 of the socket contact 100 is housed in the socket 1. The through hole 301 has a tapered surface that becomes narrower on the side closer to the insulating substrate 200, and the base of the contact piece 101 is press-fitted into this tapered lower end position, and the base side of the contact piece 101 is fixed to the insulator 300, and the free The end side is made to protrude upward from the upper surface of the insulator 300.

In this example, the contact pieces 101 of the socket contact 100 are arranged so that the center axis of one contact piece is shifted from the center axis of the other contact piece, and they protrude in opposite directions from each other, as shown in FIG. The protruding portion 101A,
101B is provided, and these protruding parts 101A and 101
B is engaged with the engaging means formed on the insulating cover 400 to perform an operation of pushing and widening the opposing gap between the contact pieces 101.

In other words, the insulating cover 400 is formed of a flat plate made of an insulator, and pin insertion holes 401 are formed in the front plate surface in the same arrangement as the pins 501 of the connected object 500, as shown in FIG. Ru. A contact piece accommodating hole 402 is formed on the back surface in communication with the pin insertion hole 401, and the contact piece 101 of the socket contact 100 protruding from the upper surface of the insulator 300 is inserted into this contact piece accommodating hole 402.

The engagement means is provided inside the armature housing hole 402. In this example, as shown in FIG.
A protruding portion 10 formed in a contact piece 101 on the side wall of 02
Projecting walls 403A and 403 that engage with 1A and 101B
B is formed, and the engaging means 403 is formed by these projecting walls 403A and 403B. Projection wall 4
03A and 403B are composed of walls facing in opposite directions, and the distance between these walls is W (see Figure 6).
is selected to be equal to or larger than the diameter of the pin 501 of the connected body 500. Also, at the bottom end there is a contact piece 10.
A tapered surface TP is formed that guides 1 in the direction of pushing and expanding. With this configuration, by placing the insulating cover 400 on the contact piece 101 and pushing it downward, the engaging means 403 is engaged with the contact piece 101, and the contact piece 101 is inserted into the contact piece storage hole 402. Insert and store. In this stored state, the opposing gap between the contact pieces 101 is expanded by the engaging means 403 as shown in FIG.

Therefore, in this state, by inserting the pin 501 of the connected object 500 into the pin insertion hole 401 formed on the upper surface side of the insulating cover 400, the connected object 50 is inserted.
The pin 501 of 0 can be inserted into the opposing gap portion of the contact piece 101 with almost no resistance.

In this state, attach the insulating cover 400 to the connected object 500.
and move the engaging means 403 upward with the contact piece 1.
01, the contact pieces 101 move toward each other due to their own spring force, and as shown in FIGS. 8 and 9, the pins 5 of the connected body 500
Contact 01. This contact pressure is applied by the spring force of the contact piece 101, and a safe contact state can be maintained.

To remove the connected object 500 from the socket, the insulating cover 400 may be pushed downward. By lowering the insulating cover 400, the engaging means 4
03 presses and spreads the contact pieces 101, so if the object to be connected 500 is pulled out in this state, the object to be connected 500 can be pulled out without resistance.

"Modified Embodiment" FIGS. 10 and 11 show a modified embodiment of this invention. In this example, the engagement means 403 provided in the contact piece storage hole 402 of the insulating cover 400 is connected to the protruding piece 403C.
This shows the case configured by In other words, in this example, the axes of the contact pieces 101 are arranged directly facing each other without being shifted from each other, and the protruding pieces 401 are arranged in the contact piece storage hole 402.
3C is formed, and this protruding piece 403C is inserted into the opposing gap of the contact piece 101 to push and spread the contact piece 101. The contact piece 403C is formed so as not to hang on the axis of the pin insertion hole 401, and the protruding piece 403C is connected to the contact piece 10.
1, connect the pin of the object to be connected with the contact piece 101.
It is permitted to insert it into the opposing gap.

Even if the engaging means 403 is constituted by the projecting piece 403C in this way, when the engaging means 403 is engaged with the contact piece 101, the contact piece 101 is pushed out, so that the pin of the connected object cannot be pinned. can be inserted into the opposing gap portion of the contact piece 101 without resistance,
The same effects as in the above embodiment can be obtained.

In the above-mentioned embodiment, the explanation of the driving means for the insulating cover 400 was omitted, but the insulating cover 40
The driving means for raising and lowering 0 can be constructed, for example, by a structure in which an eccentric cam is rotated by a lever, and various other driving mechanisms can be applied.

"Effects of the invention" As explained above, according to this invention, no insertion or removal force is applied to the pins of the connected objects when the connected objects are connected or removed, so accidents such as bending of the pins of the connected objects occur. can be prevented.

In addition, since no insertion/extraction force is required, no unreasonable force is applied to the package of the connected object, so accidents that damage the package will not occur.

Therefore, a highly reliable multi-pin socket can be provided.

[Brief explanation of the drawing]

Figure 1 is a partially sectional side view showing an embodiment of this invention; Figure 2 is a partially sectional side view seen from a direction 90° different from the side view of Figure 1;
The figure is a plan view for explaining the shape of the insulating cover used in this invention, FIG. 4 is a perspective view for explaining an example of a socket contact used in an embodiment of this invention, and FIG. 5 is a diagram for explaining this invention. FIG. 6 is an enlarged back view for explaining an example of the main part of this invention, and FIGS. 7 to 9 are side views of the main parts of this invention. FIG. 10 is an enlarged sectional view for explaining the operation, FIG. 10 is a back view for explaining the modified embodiment of this invention, FIG. 11 is an enlarged sectional view for explaining the operation of this modified embodiment,
FIG. 2 is a perspective view for explaining the conventional technology. 100... Socket contact, 101... Contact piece, 200... Insulating substrate, 300... Insulating flat plate, 400... Insulating cover, 401... Pin insertion hole, 402... Contact piece storage hole, 403... Engagement means.

Claims (1)

[Scope of Claim for Utility Model Registration] A: A pair of contact pieces arranged to form a gap narrower than the diameter of the pin of the connected body; B: A contact piece storage hole that receives the free end of the contact piece;
With the free end of the contact piece received in the contact piece storage hole and the pin insertion hole of the connected body that communicates with the surface opposite to the surface where the contact piece storage hole is formed, press the opposing gap between the contact pieces. an insulating cover comprising an expanding engagement means; and a socket comprising: