Zero insertion force socket

Details Zero insertion force socket Zero insertion force socket

1999-04-29

2001-02-13

Abrams, Neil (Department: 2839)

Electrical connectors

With coupling movement-actuating means or retaining means in...

Including compound movement of coupling part

C439S924100

Reexamination Certificate

active

06186815

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an electrical socket for electrically connecting a electronic package and a mother board, and particularly to a zero insertion force (ZIF) electrical socket which can lower the operating resistance of the ZIF socket.
A conventional socket of the prior arts for electrically engaging with a electronic package having a large number of terminals should be equipped with auxiliary features for facilitating the mating process. For example, a cam lever can be introduced for simplifying opening and closing operations. In addition, engaging terminals of the ZIF socket can be configured to reduce a normal contact force between the engaging terminals of the ZIF socket and conductive contacts of a mating electronic package. However, large operating resistance is still not properly addressed by sockets of the prior art. Large contact normal peak force between engaging terminals of the electronic package and conductive terminals of a mating socket must be overcome at the onset of operation. Furthermore, unstable or inaccurate contact may result between terminals of an electronic package and a socket during assembly.
BRIEF SUMMARY OF THE INVENTION
A main object of the present invention is to provide a socket exhibiting the advantages of a low peak operating resistance and a reliable electrical connecting performance thereby ensuring mating quality.
In accordance with one aspect of the present invention, adjacent groups of engaging terminals received in corresponding engaging slots of a socket are arranged to be offset relative to each other. Thus, the engaging terminals of the socket contact with corresponding conductive terminals of a mating electronic package at different times thereby lowering operating resistance of the socket for moving from an inoperative position to an operative position by activating a lever from a vertical position to a horizontal position during assembly.
In accordance with another aspect of the present invention, rows of engaging slots receiving the corresponding engaging terminals of the socket are arranged to be offset relative to each other for electrically engaging the conductive terminals of the electronic package at different times.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 5380997 (1995-01-01), Hania et al.
patent: 5649836 (1997-07-01), Kashiwagi

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