Contact for CPU socket connector

Details Contact for CPU socket connector Contact for CPU socket connector

2001-04-18

2001-11-20

Sircus, Brian (Department: 2839)

Electrical connectors

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

Including compound movement of coupling part

Reexamination Certificate

active

06319038

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a contact for an electrical connector, and particularly to a contact for a CPU (Central Processing Unit) socket connector.
2. Brief Description of the Prior Art
U.S. Pat. No. 4,498,725 discloses a conventional terminal
5
for a CPU socket connector, as is shown in FIG.
6
. The terminal
5
comprises a base
50
, a soldering tail
52
depending from the base
50
, and a pair of arms
51
extending upwardly and rearwardly from the base
50
. Forwardly extending palms
55
are connected to the arms
51
by contact regions
53
. A distance between the contact regions
53
is greater than that between the palms
55
.
A pin of a CPU (not shown) is resiliently clamped between the palms
55
for establishing an electrical connection therebetween. As the palms
55
are cantilevers, their resilience is relatively small. The palms
55
cannot apply sufficient mating force against the pin to ensure reliable engagement between the pin and the palms
55
. Thus when the terminal
5
or the pin is subjected to vibration or shock, the pin is sometimes dislodged.
Hence, an improved electrical connector is required to overcome the disadvantage of the prior art. The application Ser. No. 09/792,802 filed on Feb. 23, 2001 having one common inventor and the same assignee with the instant application, discloses one approach which relates to the invention with somewhat extent. Also, U.S. Pat. Nos. 5,299,950, 5,443,591, 5,454,727, 5,797,774 and 4,832,611 were cited as references in the aforementioned copending application.
BRIEF SUMMARY OF THE INVENTION
A main object of the present invention is to provide a contact for a CPU socket connector providing improved mating force against a pin of a CPU.
To achieve the above-mentioned object, a contact for a CPU socket connector in accordance with a first embodiment of the present invention includes a base and a pair of arm sections. The base has a body section adapted to optionally abut against the housing of the connector in the corresponding passageway in which the contact is received, a head section for being secured in the CPU socket connector, and a soldering section for being soldered onto a printed circuit board.
Each arm section includes an upper arm projecting obliquely downwardly from a lateral side of the body section and adapted to optionally abut against the housing of the connector in the corresponding passageway, a forearm extending upwardly from a free end of the upper arm, a contact region at a free end of the forearm, and a palm extending obliquely from the contact region toward the body section. A first space is defined between the forearms. A channel is defined between the contact regions, and within the first space. A second space is defined between the palms, in communication with the first space at the channel. A width of the channel is not only narrower than widths of the first space, but also narrower than widths of the second space. A pin of a CPU is adapted to engage with the contact regions and establish electrical connection therebetween. Since the contact regions are located between the palms and the forearms rather than at free ends of the palms, mating force exerted by the contact regions against the pin is enhanced.
A second embodiment does not have a head section to reduce the possibility of interference with an inserted pin. Accordingly, the arm sections extend beyond an upper limit of the body section.
Other objects, advantages and novel features of the present invention will become more apparent from the following detailed description of the preferred embodiments when taken in conjunction with the accompanying drawings.


REFERENCES:
patent: 4422703 (1983-12-01), Christensen et al.
patent: 4498725 (1985-02-01), Bright 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
patent: 6113412 (2000-09-01), Lin
patent: 6142810 (2000-11-01), Hsiao et al.

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