JPH0883659A - Ic socket - Google Patents

Abstract

PURPOSE: To provide a proper contact operation through guide and restriction with the front and rear ends of the contact arm of a contact pin. CONSTITUTION: The lead terminal of an IC element comes in contact with the corresponding contact section 3 of the contact arm 2 of a contact pin 1 under pressure, when a cover is closed with the lead terminal mounted. In addition, the IC element and the arm 2 of the pin 1 are formed out of arm sections 2a and 2b and, therefore, not twisted, even when subjected to a force in pressure contact direction, thereby ensuring the proper contact operation of the arm 2 with the lead terminal of the IC element. Furthermore, the pin 1, even when subjected to a force from an upper level, is not twisted as mentioned, because the force is distributed in upper and lower directions with the mutual action of a pair of the arm sections 2a and 2b. Thus, even when the pin 1 is formed extremely thin, the proper contact thereof with the lead terminal of the IC element is guaranteed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IC socket for electrically connecting a lead terminal of an IC element to an external circuit, in particular, contact pins to be brought into contact with the lead terminal are arranged in a very fine pitch on a socket body. Related to an IC socket.

[0002]

2. Description of the Related Art A lead terminal of an IC element is mounted on a contact pin arranged in multiple rows on a socket body, and a lid body pivotally supported on the socket body is closed to press the IC element to form a lead terminal and a contact pin. In the IC socket in which the contacts are pressed, the fine pitch of the contact pins is being advanced in order to cope with higher density of IC elements. As the miniaturization progresses, it becomes more difficult to form not only the contact pins themselves but also the guide walls for implanting the contact pins in the socket body and guiding and regulating the contact operation with the lead terminals.

Conventionally, for example, in a connector for an integrated circuit board disclosed in Japanese Utility Model Application Laid-Open No. 58-70687, a contact portion for mounting a terminal of an integrated circuit board on a free end of an elastic contact arm is formed and formed. A guide piece is formed protruding in the vicinity of the portion, and the elastic displacement of the elastic contact arm is guided by interposing the guide piece into a guide groove (guide wall) formed in the socket body.
In other words, according to this connector, the elastic contact arm corresponding to the contact pin of this type of IC socket is configured such that the front free end side and the rear fixed end side are partially guided, so that particularly the socket body Molding can be facilitated.

On the other hand, in order to realize the fine pitch of the contact pins described above, the present applicant has already filed Japanese Utility Model Application No. 3-414.
No. 76 proposes an IC socket contact pin whose thickness is extremely thin and whose strength and the like are guaranteed. As shown in FIG. 3, the contact pin has an annular contact arm 2 composed of a pair of arms 2a and 2b opposed to each other. Also, in the figure,
A contact portion 3 for contacting a lead terminal of an IC element (not shown) is formed at a front free end of the contact arm 2, and the contact arm 2 is connected to a base of the contact pin 1 via a neck 4 at a rear fixed end. Have been. According to this contact pin 1, for example, as shown in FIG. 4, even if a force F is applied from above the contact pin 1, the pair of arm portions 2
Since the force F is distributed upward and downward by the arms 2a and 2b, even the contact pin 1 which is formed extremely thin without being twisted by the arm portions 2a and 2b can properly operate with the lead terminal of the IC element. Guaranteed.

[0005]

However, in this type of conventional IC socket, for example, although the contact pin 1 has a sufficient strength in the vertical direction with respect to the force F as described above, it does not It is easy to bend in the direction in which it is arranged, and there is a problem that a contact accident may occur between adjacent members. When implanted in the socket body, the elastic contact arm (contact arm 2) is partially formed at the front free end side and the rear fixed end side as in the connector described in Japanese Utility Model Application Laid-Open No. 58-70687. With such a configuration, it is difficult to prevent such contact accident between the contact pins 1 at the intermediate portion.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an IC socket of this kind which can ensure proper operation of contact pins and effectively realize a fine pitch of contact pins. I do.

[0007]

An IC socket according to the present invention has a plurality of contact pins arranged on a socket body.
By mounting the lead terminal of the C element and closing the lid body pivotally supported by the socket body, the IC element is pressed to press the lead terminal and the contact pin into contact with each other. The contact pin includes an annular contact arm composed of a pair of opposing arm portions, and serves as a guide wall for disposing the contact pin in the socket body, and the front portion of the contact arm of the contact pin is free. Guide / restriction portions are formed on the end side and the rear fixed end side, and further, at least the region between the front free end and the rear fixed end of the contact arm is insulation-molded.

[0008]

According to the IC socket of the present invention, the contact pin can perform proper contact operation with the lead terminal of the IC socket by guiding and regulating the front free end side and the rear fixed end side of the contact arm. At the same time, the contact arm can be completely insulated between the contact pins because at least the region between the front free end and the rear fixed end of the contact arm is insulation-molded.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an IC socket according to the present invention will be described below with reference to FIGS. 1 and 2 by using the same reference numerals for the same members as in the conventional example. The basic configuration of the contact pin 1 is similar to that of the conventional example, but as shown in FIG. 1, the front free end side of the contact arm 2 is supported by one slit 5a of the guide wall 5 and the rear part thereof. The fixed end side is planted in the socket body 6 so as to be guided and regulated by the other slit 5b of the guide wall 5, respectively. FIG. 2 shows a state in which a large number of such contact pins 1 are arranged in the socket body 6. In the figure, reference numeral 7 denotes a lid pivotally supported by the socket body 6 via a shaft 8, and 9 denotes a cover. A pad provided on the inner surface of the lid 7 so that the IC element is pressed by closing the lid 7 to press the lead terminal against the contact portion 3 of the contact pin 1. Further, as shown in FIG. 1, the contact pin 1 has an insulating means 2c formed by coating, for example, an insulating material at least in a region between the front free end and the rear fixed end of the contact arm 2.

Since the IC socket according to the present invention is constructed as described above, the contact arm 2 of the contact pin 1
When the lead terminal of the IC element corresponding to the contact portion 3 of the above is mounted and closed, the lead terminal and the contact portion 3 are pressed against each other by closing the lid body 7, and the IC element and the contact pin 1
Connect electrically. In this case, as described above, the contact arm 2 of the contact pin 1 includes the pair of arm portions 2a, 2
b, so that the IC is not twisted especially with respect to the force F in the pressure contact direction of the lead terminal (see FIG. 4).
Proper contact operation with the lead terminals of the element is guaranteed.

In the contact operation of the contact pins 1, if the contact pins 1 arranged at an extremely fine pitch are bent in the direction in which the contact pins 1 are arranged, the contact arms 2 of the adjacent contact pins 1 come into contact with each other. May be. On the other hand, the contact arm 2 has insulating means 2
Since c is formed, the insulation between the contact pins 1 is ensured, so that a short-circuit accident between the contact pins 1 can be prevented. Therefore, the safe and reliable connection between the IC element and the contact pins 1 can be prevented. An electrical connection is made. Then, by ensuring proper operation of the contact pins 1 and eliminating electrical contact accidents between the contact pins 1, it is possible to effectively cope with the thinning of the contact pins 1 and the fine pitch of their arrangement.

[0012]

As described above, according to the present invention, it is possible to guarantee the proper operation of this type of IC socket having a contact pin having a reduced thickness and a fine pitch, and to facilitate the molding process. There are advantages such as possible.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part according to an embodiment of an IC socket of the present invention.

FIG. 2 is a plan view of an IC socket according to an embodiment of the present invention.

FIG. 3 is a front view of a contact pin used in a conventional IC socket.

FIG. 4 is a front view illustrating the operation of a contact pin according to a conventional IC socket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact pin 2 Contact arm 3 Contact part 4 Neck 5 Guide wall 6 Socket body 7 Lid 8 Axis 9 Pad

Claims (1)

[Claims] An IC element lead terminal is placed on a large number of contact pins arranged in a socket body, and a lid pivotally supported by the socket body is closed to press the IC element to thereby press the lead terminal. And an IC socket configured to press-contact the contact pin with the contact pin, wherein the contact pin includes an annular contact arm including a pair of opposed arm portions, and the contact pin is disposed on the socket body. As a guide wall, a guide / regulator is formed on the front free end side and the rear fixed end side of the contact arm of the contact pin, and the contact arm is at least between the front free end and the rear fixed end. An IC socket, wherein an area is formed by insulation molding.