JPH0517973U - IC Socket - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an IC socket capable of ensuring proper operation of contact pins and effectively realizing a fine pitch of the contact pins. [Structure] A plurality of contact pins 1 arranged in a row on a socket body 6 are mounted with lead terminals of an IC element, and a lid 7 pivotally supported on the socket body 6 is closed to close the IC.
By pressing the element, the lead terminal and the contact pin 1
The contact pin 1 is provided with an annular contact arm 2 composed of a pair of opposing arm portions 2a and 2b, and the contact pin 1 is arranged on the socket body 6. The guide wall 5 for installation has guide / regulating portions formed on the front free end side and the rear fixed end side of the contact arm 2 of the contact pin 1, and the contact arm 2 has at least the front portion thereof. The region between the free end and the rear fixed end is insulation molded 2c.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an IC socket for electrically connecting a lead terminal of an IC element and an external circuit, and particularly to an IC socket in which contact pins to be brought into contact with the lead terminal are arranged in a row in a socket body at an extremely fine pitch.

[0002]

[Prior Art]

 The lead terminals of the IC element are mounted on a large number of contact pins arranged in a row on the socket body, and the lid body pivotally supported on the socket body is closed to press the IC element so that the lead terminals and the contact pins are pressed against each other. In the above-mentioned IC socket, the fine pitch of the contact pins is being advanced in order to cope with higher density of IC elements. As such miniaturization progresses, not only the contact pin itself but also the molding of the guide wall to guide and regulate the contact operation with the contact pin by implanting the contact pin in the socket body becomes difficult. ..

Conventionally, for example, in a connector for an integrated circuit mounting board disclosed in Japanese Utility Model Laid-Open No. 58-70687, a contact portion for mounting a terminal of the integrated circuit board is formed at a free end of an elastic contact arm and the contact is formed. A guide piece is formed so as to project near the portion, and the guide piece is inserted into a guide groove (guide wall) formed in the socket body to guide the elastic displacement of the elastic contact arm. That is, according to this connector, the elastic contact arm corresponding to the contact pin of this type of IC socket is designed such that the front free end side and the rear fixed end side thereof are partially guided. The molding process of the main body can be facilitated.

On the other hand, in order to realize the above-described fine pitch of the contact pins, the present applicant has already tried to make the thickness extremely thin and to guarantee the strength and the like according to Japanese Patent Application No. 3-41476. We are proposing contact pins for IC sockets. As shown in FIG. 3, the contact pin has an annular contact arm 2 composed of a pair of arm portions 2a and 2b facing each other. Further, in the figure, a contact portion 3 for contacting a lead terminal of an IC element (not shown) is formed at the front free end of the contact arm 2, and the contact arm 2 makes contact via a neck portion 4 at the rear fixed end. It is connected to the base of pin 1. According to the 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 2a and 2b disperse the force F upward and downward. Even with the contact pin 1 which is formed extremely thin without being twisted by the arms 2a and 2b, proper contact operation with the lead terminal of the IC element is guaranteed.

[0005]

[Problems to be solved by the device]

 However, in the conventional IC socket of this type, for example, although the contact pin 1 has sufficient strength in the vertical direction with respect to the force F as described above, it is easy to bend in the row direction in the socket body, For this reason, there was a problem such as a contact accident between the two. When it is implanted in the socket body, the elastic contact arm (contact arm 2) is partially formed on the front free end side and the rear fixed end side like the connector described in Japanese Utility Model Laid-Open No. 58-70687. If it is configured so that it will be difficult to prevent contact accidents between the contact pins 1 at the intermediate portion.

In view of the above situation, the present invention provides an IC socket of this type that can ensure proper operation of the contact pins and can effectively realize a fine pitch of the contact pins. To aim.

[0007]

[Means for Solving the Problems]

 In the IC socket according to the present invention, a large number of contact pins arranged in a row on the socket body are mounted with lead terminals of the IC element, and the lid body pivotally supported on the socket body is closed to press the IC element. The lead terminal and the contact pin are pressed against each other.The contact pin has an annular contact arm composed of a pair of opposing arm portions, and the contact pin is attached to the socket body. As guide walls for disposing, guide / regulating portions are 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 the front free end thereof. And the area between the rear fixed ends is insulation molded.

[0008]

[Action]

 According to the IC socket of the present invention, the contact pin can guide and regulate the front free end side and the rear fixed end side of the contact arm to perform proper contact operation with the lead terminal of the IC socket, and also to make contact. Since at least the region between the front free end and the rear fixed end of the arm is formed by insulation molding, it is possible to completely insulate the contact pins from each other.

[0009]

【Example】

 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 the same as that of the conventional example, but as shown in FIG. 1, the front free end side of the contact arm 2 is formed by one slit 5a of the guide wall 5, The rear 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. 2 shows a state in which the contact pins 1 are arranged in multiple rows on the socket body 6, but in the figure, 7 is a lid body pivotally supported on the socket body 6 via a shaft 8 and 9 is a lid body. It is a pad provided on the inner side surface of the lid body 7 so as to press the IC element by closing the lid body 7 to bring the lead terminal and the contact portion 3 of the contact pin 1 into pressure contact. Further, as shown in FIG. 1, the contact pin 1 is provided with an insulating means 2c formed by coating an insulating material, for example, in a region between at least the front free end and the rear fixed end of the contact arm 2. ..

Since the IC socket according to the present invention is configured as described above, the lid body is mounted with the lead terminal of the IC element corresponding to the contact portion 3 of the contact arm 2 of the contact pin 1 mounted thereon. By closing the lid 7, the lead terminal and the contact portion 3 are brought into pressure contact with each other, and the IC element and the contact pin 1 are electrically connected. In this case, as described above, since the contact arm 2 of the contact pin 1 is composed of the pair of arm portions 2a and 2b, it should be twisted especially against the force F (see FIG. 4) in the pressure contact direction of the lead terminal. Therefore, proper contact operation with the lead terminals of the IC element is guaranteed.

In addition, in the contact operation of the contact pins 1, when the contact pins 1 arranged at an extremely fine pitch are bent in the row direction, the contact arms 2 of the contact pins 1 adjacent to each other contact each other. I have something to do. On the other hand, since the contact arm 2 is provided with the insulating means 2c, the insulation between the contact pins 1 is guaranteed, so that a short-circuit accident between the contact pins 1 can be prevented. Therefore, a safe and reliable electrical connection between the IC element and the contact pin 1 is achieved. 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]

[Effect of the device]

 As described above, according to the present invention, it is possible to ensure proper operation of the IC socket of this type having a contact pin with a thin wall and a fine pitch and to facilitate the forming process. There is.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential 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 related to a conventional IC socket.

[Explanation of symbols]

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

Claims (1)

[Scope of utility model registration request] 1. A lead terminal of an IC element is mounted on a contact pin arranged in a row on a socket body, and a lid body pivotally supported on the socket body is closed to press the IC element to thereby lead the lead terminal. In the IC socket in which the contact pin and the contact pin are brought into pressure contact with each other, the contact pin has an annular contact arm composed of a pair of opposing arm portions, and the contact pin is arranged on the socket body. As a guide wall, a guide / regulating portion 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 characterized in that the region is formed by insulation.