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.
2. Description of the Prior Art
U.S. Pat. No. 4,498,725 discloses a conventional terminal 3′ for a CPU socket, as is shown in
A pin of a CPU (not shown) is resiliently clamped between the forearms 322′ and contacted with the contact regions 33′ for establishing an electrical connection therebetween. As the forearms 322′ are cantilevers, their resilience is relatively small. The forearms 322′ cannot apply sufficient mating force against the pin to ensure reliable engagement between the pin and the contact regions 33′. Thus when the terminal 3′ or the pin is subjected to vibration or shock, the pin is sometimes dislodged.
Thus, there is a need to provide a contact for CPU socket that overcomes the above-mentioned problems.
Accordingly, an object of the present invention is to provide a contact for a CPU socket providing improved mating force against a pin of a CPU.
To fulfill the above-mentioned object, a contact for a CPU socket in accordance with a preferred embodiment of the present invention comprises a base and a pair of arm sections. The base has a body section adapted to optionally abut against the housing of the socket in the corresponding passageway in which the contact is received, a head section for being secured in the CPU socket, and a soldering section for being soldered onto a printed circuit board via a solder ball. Each arm section comprises an upper arm projecting obliquely and downwardly from a lateral side of the body section and adapted to optionally abut against the housing of the socket in the corresponding passageway, a forearm extending obliquely, circuitously and upwardly from a free end of the upper arm, a contact region divergently away from each other at a free end of the forearm. A first space is defined between the forearms and a second space is defined between the contact regions, and a channel is defined between the first and second spaces to connect the first and second spaces. A width of the channel is not only narrower than that of the first space, but also narrower than that of the second space. A pin of a CPU is adapted to engage with the contact regions and establish electrical connection therebetween. Since the forearm and the upper arm are resiliently located on the contact to provide great resilience for the contact region located at a free end of the forearm, mating force exerted by the contact regions against the pin of the CPU is enhanced than the conventional contact.
Other objects, advantages and novel features of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
Reference will now be made to the drawings to describe the present invention in detail.
The base 10 comprises a body section 12, a head section 11 upwardly projecting from the body section 12, and a soldering section 14 extending perpendicularly from a bottom edge of the body section 12. A pair of upper projections 111 is respectively formed at top portions of opposite lateral edges of the head section 11, and a pair of lower projections 121 is respectively formed at bottom portions of the opposite lateral edges of the body section 12, for interferingly securing the contact 1 in the CPU socket. A junction 211 is defined where each arm section 20 meets the body section 12.
Each arm section 20 comprises an upper arm 21 extending obliquely downwardly from one lateral edge of the body section 12 toward the soldering section 14, an elbow 23 at a bottom portion of the upper arm 21, a forearm 25 extending obliquely, circuitously and upwardly from a free end of the upper arm 21, a contact region 27 divergently away from each other at a free end of the forearm 25. Each forearm 25 extends from a corresponding elbow 23 toward each other in a direction whose projection in side view is essentially parallel to the body section 12. The forearms 25, elbows 23 and contact regions 27 together define a bellow first space 251. A second space 271 is defined between the contact regions 27, in communication with the first space 251 at a channel 272 connected between the first and second spaces 251, 271. A portion of the first space 251 between the elbows 23 is wider than that of the channel 272 between the forearms 25. A portion of the second space 271 between the contact regions 27 is narrower than that of the first space 251 between the elbows 23. The first space 251 and the second space 271 are respectively contained in the first and second planes to be perpendicular to each other.
As is indicated in
In the present invention, the forearm 25 and the upper arm 21 are resiliently located on the contact 1 to provide great resilience for the contact region 27 located at a free end of the forearm 25, mating force exerted by the contact regions 27 against the pin 3 of the CPU is enhanced than the conventional contact.
Although the present invention has been described with reference to particular embodiments, it is not to be construed as being limited thereto. Various alterations and modifications can be made to the embodiments without in any way departing from the scope or spirit of the present invention as defined in the appended claims.
Number | Date | Country | Kind |
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93220378 | Dec 2004 | TW | national |