JPH0652956A - Ic socket for sop - Google Patents

Abstract

PURPOSE:To prevent reduction in the strength by improving the elastic deformation force of the leg part, which thus is not easily broken. CONSTITUTION:A leg part 2 is hung from a rectangular socket frame 1. An engagement pawl part 3 is provided below the leg part 2. The engagement pawl part of a socket main body. An IC for SOP is sandwiched and held between the socket main body and the socket frame 1. A plurality of leg parts 2 are hung from a pair of sides 1a of the socket frame 1, which are opposed to one another. The thickness of the side 1a, from which the leg part 2 of the socket frame 1 is hung, is made to be thinner compared with the other side 1b, except for a guiding protrusion 7 of the IC for SOP, and a thinned part 8 reaches the corner part of the rectangular socket frame 1. The hung base part of the leg part 2 is wider in the upper part, and the side edge of the hung base part is formed into arc. The leg parts 2 are connected by a reinforcing wall 9, and are thus reinforced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an SOP IC socket, and more particularly to a technique for preventing damage to legs of a socket frame that is detachably attached to a socket body.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS.
Hanging the leg 2 from the rectangular socket frame 1,
A locking claw 3 is provided below the leg 2, the locking claw 3 is elastically locked to the locking part 5 of the socket body 4, and the SOP IC 6 is provided between the socket body 4 and the socket frame 1. There are known SOP IC sockets (small, outline, package IC sockets) that sandwich and hold the SOP. In this SOP IC socket, conventionally, a rectangular socket frame 1 as shown in FIG. 7 is used.
The sides 1a and 1b have the same thickness, and only the upper position of the leg 2 is thinned on the side 1a on which the leg 2 is suspended, and the leg 2 is deformed as shown in FIG. The locking claw portion 3 provided at the lower end of 2 is locked to the locking portion 5 of the socket body 4, or conversely, the locking is released.

[0003]

However, in the above-mentioned conventional example, when the leg portion 2 is bent and locked, or unlocked, the cross hatching portion shown in FIG. 9 is used. If stress concentrates on the portion and the material becomes brittle due to variations in the molding material or the like, there is a problem that the hanging base portion of the leg 2 is easily damaged. That is, the socket frame 1
The strength difference between the thick portions of the sides 1a and 1b and the leg portion 2 is large, and the stress is concentrated on the boundary portion. In particular, the stress concentration due to the difference in thickness in the portion A of FIG. 8
There is a problem that stress concentrates on this portion because the side edge of the portion widened upward from the hanging base of the leg 2 is straight.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to improve the elastic deformation force of the leg portion so that the leg portion is hard to be broken, and yet the strength is high. An object is to provide an SOP IC socket that can prevent the deterioration.

[0005]

The SOP IC socket of the present invention comprises a rectangular socket frame 1 to a leg portion 2.
And a locking claw portion 3 is provided below the leg portion 2 to elastically lock the locking claw portion 3 to the locking portion 5 of the socket body 4 and between the socket body 4 and the socket frame 1. At SOP
In an SOP IC socket in which an IC 6 for holding is sandwiched and held, a plurality of legs 2 are hung on a pair of opposing sides 1a of a rectangular socket frame 1 to form a leg of the rectangular socket frame 1. The side 1a that hangs the part 2 is S
The guide projection 7 of the OP IC 6 is left to be thinner than the other side 1b so that the thin portion 8 reaches the corner portion of the rectangular socket frame 1, and the hanging base portion of the leg portion 2 is widened upward. It is wide, and the side edge of the hanging base portion of the leg portion 2 is arcuate, and the leg portions 2 are connected by a reinforcing wall 9. By adopting such a configuration, The object of the present invention is achieved by solving the above-mentioned problems of the conventional example.

[0006]

In the present invention having the above-described structure, a plurality of leg portions 2 are hung from a pair of opposing sides 1a of the rectangular socket frame 1 so that the rectangular socket frame 1 has a rectangular shape.
The side 1a that hangs the leg 2 is made thinner than the other side 1b while leaving the guide projection 7 of the SOP IC 6, and the thin portion 8 reaches the corner portion of the rectangular socket frame 1. Thus, the bending is obtained in a wide range including the side 1a so that the stress is not concentrated only on the hanging base of the leg 2, and the hanging base of the leg 2 is wider toward the upper side. In addition, by making the side edge of the hanging base portion of the leg portion 2 into an arc shape, stress can be dispersed and it is more difficult to break as compared with the case where the side edge of the hanging base portion of the leg portion 2 is straight. Further, since the leg portions 2 are connected to each other by the reinforcing wall 9, the strength can be secured in good balance as a whole even though the side 1a is thin.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. The SOP IC socket has a rectangular socket frame 1 similar to the conventional example shown in FIGS.
It is composed of a socket body 4, a leg portion 2 is hung from the socket frame 1, a locking claw portion 3 is provided at a lower portion of the leg portion 2, and the locking claw portion 3 is elastically attached to the locking portion 5 of the socket body 4. The SOP IC 6 is sandwiched and held between the socket body 4 and the socket frame 1.
The socket body 4 is a printed wiring board (not shown).
The terminal board 10 can be attached by soldering to
When the SOP IC 6 is sandwiched and held on the terminal plate 10 by the socket body 4 and the socket frame 1 as described above, the terminal 11 of the SOP IC 6 is elastically pressed against the terminal plate 10 of the socket body 4. It is supposed to be done. In the present invention, the structure of the socket frame 1 is different from that of the conventional example, and therefore the socket frame 1 will be described below.

The socket frame 1 is made of synthetic resin and has a rectangular shape. As shown in FIGS. 1 and 2, a plurality of (two in the illustrated embodiment) leg portions 2 hang down on a pair of opposing sides 1a of the rectangular socket frame 1. On the inner surface side of the lower end portion of the leg portion 2, a locking claw portion 3 is provided so as to project. The inner surface of the side 1a hanging the leg 2 of the rectangular socket frame 1 is SOP.
The other portion of the IC 6 for use is left thinner than the other side 1b of the socket frame 1 except the guide projection 7. The thin portion 8 reaches the corner of the rectangular socket frame 1. As shown in FIG. 2, the hanging base portion of the leg portion 2 is wider toward the upper side, and the side edge of the hanging base portion of the leg portion 2 is arcuate. Furthermore,
The outer surface sides of the two leg portions 2 (that is, the locking claw portions 3 and the half body side) are connected by a thin plate-shaped reinforcing wall 9.

However, the locking claw portion 3 is elastically locked to the locking portion 5 of the socket body 4 and the SOP IC 6 is held by being held between the socket body 4 and the socket frame 1. . Here, the leg portion 2 bends when the engaging claw portion 3 is attached to or detached from the engaging portion 5, but in the present invention, a plurality of leg portions are provided on a pair of opposing sides 1a of the rectangular socket frame 1. 2 is hung down, the side 1a on which the leg 2 of the rectangular socket frame 1 is hung down, and the other part is made thinner than the other side 1b while leaving the guide projection 7 of the IC 6 for SOP. By bringing 8 to the corner portion of the rectangular socket frame 1, stress is applied to a wide range including the side 1a portion as shown by the cross hatching in FIG. 3, and stress is applied only to the depending base portion of the leg portion 2. It is not concentrated and the stress value in this case is small so that the material limit is not exceeded. Further, by making the hanging base of the leg 2 wider toward the upper side and by making the side edge of the hanging base of the leg 2 arcuate, the side edge of the hanging base of the leg 2 becomes straight as compared with the one having a straight shape. The stress can be dispersed, making it even more difficult to damage. Further, since the leg portions 2 are connected to each other by the reinforcing wall 9, the strength can be secured in good balance as a whole even though the side 1a is thin.

[0010]

As described above, according to the present invention, a plurality of legs are hung on a pair of opposite sides of a rectangular socket frame, and the legs of a rectangular socket frame are hung. Since the side is thinner than the other side to leave the guide projection of the SOP IC, and the thin portion reaches the corner portion of the rectangular socket frame, the side portion can be flexed in a wide range. It is possible to prevent stress from concentrating only on the hanging base part of the leg part and prevent damage to the leg part. Also, the hanging base part of the leg part is made wider toward the upper side and the hanging part of the leg part is By making the side edges of the base part arcuate, the stress can be dispersed and the damage can be prevented further, as compared with the case where the side edges of the hanging base parts of the legs are straight. Further, in the present invention, since the leg portions are connected by the reinforcing wall, the strength can be secured in good balance as a whole even though the sides are thin.

[Brief description of drawings]

FIG. 1 is a partially omitted perspective view of a socket frame used in the present invention.

FIG. 2 is an enlarged perspective view of a leg portion of the above.

FIG. 3 is a schematic plan view for explaining a stress concentration portion when the leg portion of the same is flexed.

FIG. 4 is a perspective view of an SOP IC socket.

FIG. 5 is an exploded perspective view of the above.

FIG. 6 is an explanatory view showing a state in which the locking claw portion of the same is being attached to and detached from the locking portion.

FIG. 7 is a partially omitted perspective view of a conventional socket frame.

FIG. 8 is an enlarged perspective view of a leg portion of a conventional example.

FIG. 9 is a schematic plan view for explaining a stress concentration portion when a leg portion of a conventional example is bent.

[Explanation of symbols]

 1 Socket Frame 2 Leg 3 Locking Claw 4 Socket Main Body 5 Locking Part 6 SOP IC 7 Guide Projection 8 Thin Wall 9 Reinforcement Wall

Claims (1)

[Claims] 1. A leg portion is hung from a rectangular socket frame, a locking claw portion is provided at a lower portion of the leg portion, and the locking claw portion is elastically locked to a locking portion of a socket body, and a socket is also provided. In an SOP IC socket in which an SOP IC is sandwiched and held between a main body and a socket frame,
A plurality of legs are hung on a pair of opposite sides of the rectangular socket frame, and the side where the legs of the rectangular socket frame are hung is on the other side leaving the guide projection of the SOP IC. In comparison, the thin-walled portion is made thinner to reach the corner portion of the rectangular socket frame, the hanging base portion of the leg portion is widened toward the upper side, and the side edge of the hanging base portion of the leg portion is formed into an arc shape so that the distance between the leg portions is increased. IC socket for SOP, characterized in that the above are connected by a reinforcing wall.