Contact for socket connector

Details Contact for socket connector Contact for socket connector

2001-02-23

2001-07-31

Ta, Tho D. (Department: 2833)

Electrical connectors

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

Including compound movement of coupling part

C439S857000

Reexamination Certificate

active

06267615

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a contact for an electrical connector, and particularly to a contact for a Central Processing Unit (CPU) socket connector.
BACKGROUND OF THE INVENTION
U.S. Pat. No. 4,498,725 discloses a conventional contact for a CPU socket connector, as is shown in FIG.
4
. The contact comprises a base
90
, a soldering tail
92
depending from the base
90
, and a pair of arms
94
extending upwardly and rearwardly from the base
90
. Forwardly extending palms
98
are connected to the arms
94
by twists
96
.
One of a plurality of pins (not shown) of a CPU is resiliently clamped between the palms
98
, for establishing an electrical connection therebetween. As the palms
98
are cantilevers having limited effective length, their resilience is relatively small. When the contact and the pin are subjected to vibration or shock, transmission of electrical signals may be adversely affected.
Furthermore, the two arms
94
are arranged symmetrically. When the pin is moved from a wide space
961
between the twists
96
to a narrow space
981
between the palms
98
, it contacts the arms
94
simultaneously. At this point, resistance to further movement of the pin is excessively large. This makes interposition of the pin between the arms
94
unduly difficult. Thus bent or broken pins or poor electrical connection can result.
Hence, an improved electrical connector is required to overcome the disadvantages of the related art.
SUMMARY OF THE INVENTION
A main object of the present invention is to provide a contact for a socket connector providing improved mating force against a pin of a CPU.
Another object of the present invention is to provide a socket contact which substantially reduces force required to move a pin of a CPU from a free space of the contact into a clamping space of the contact.
To achieve the above-mentioned objects, a contact for a socket connector in accordance with the present invention includes a base and a pair of arm sections. The base has a body section, a head section for being secured in the socket connector, and a soldering section for being soldered onto a printed circuit board.
Each arm section includes an upper arm extending obliquely downwardly from a lateral side of the body section, a forearm extending upwardly from a free end of the upper arm, a clamp at an upper end of the forearm, and a palm extending obliquely from the clamp toward the body section. A free space is defined between the palms. A clamping space is defined between the clamps. The pin is adapted to engage between the clamps and establish electrical connection therebetween.
Since the pin is engaged between the clamps rather than at free ends of the palms, mating force exerted by the clamps against the pin is enhanced.
The first clamp is longer than the second clamp. When the pin is moved toward the clamping space, it firstly contacts the palm connected to the end of the first clamp, and thereafter contacts the other palm connected to the end of the second clamp. Thus resistance during engaging of the pin is reduced.
Other objects, advantages and novel features of the present invention will be drawn from the following detailed description of preferred embodiments of the present invention with the attached drawings, in which:


REFERENCES:
patent: 4832611 (1989-05-01), Noda et al.
patent: 5299950 (1994-04-01), Kaneko
patent: 5443591 (1995-08-01), Tsai
patent: 5454727 (1995-10-01), Hsu
patent: 5797774 (1998-08-01), Kaneko

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