Heat sink clip with plurality of pressing portions

Details Heat sink clip with plurality of pressing portions Heat sink clip with plurality of pressing portions

2002-12-09

2004-08-10

Vortman, Anatoly (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C361S696000, C361S702000, C361S703000, C257S706000, C257S707000, C024S458000

Reexamination Certificate

active

06775138

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to heat sink clips, and more particularly to a heat sink clip which easily and securely attaches a heat sink to an electronic device such as a central processing unit (CPU) that is mounted on a socket.
2. Description of Prior Art
Continued development of CPUs has enabled them to perform more and more functions. Heat generated by CPUs has increased commensurately. Measures must be taken to efficiently remove the heat from the CPU. Typically, a heat sink having great heat conductivity is mounted on the CPU to remove heat therefrom. A clip is frequently used to firmly attach the heat sink to the CPU, thus achieving greater efficiency of heat dissipation.
A conventional clip for securing a heat sink, a CPU and a CPU socket together is disclosed in U.S. Pat. No. 5,771,155. Referring to
FIG. 3
, the clip comprises a horizontal portion
514
, a first leg
588
, a second leg
594
, and a handle
592
. A coiled pressing portion
552
is formed in a middle part of the horizontal portion
514
, for pressing a heat sink
400
against a CPU
600
. A pair of looped hooks
590
is respectively formed at distal ends of the first and second legs
588
,
594
. The hooks
590
are resiliently engaged with ears
710
formed at opposite sides of a CPU socket
700
. However, the pressing portion
552
provides only two contact points pressing against the heat sink
400
. The clip does not apply enough force to securely retain the heat sink
400
against the CPU
600
, particularly when the assembly is subjected to vibration or shock during use.
Thus, a heat sink clip which can overcome the above-mentioned problems is desired.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a heat sink clip which easily and securely attaches a heat sink to an electronic device such as a CPU that is mounted on a socket.
In order to achieve the object set out above, a heat sink clip in accordance with a preferred embodiment of the present invention is for securing a heat sink to a CPU mounted on a CPU socket. The clip is shaped from a single piece of metal wire. Opposite ends of the metal wire are bent to form a generally twin strand structure that is the clip. The clip comprises a central pressing portion, two resilient connecting portions extending outwardly and upwardly from the pressing portion, and two arms depending from distal ends of the connecting portions. The pressing portion comprises four contact points at a bottom thereof, for pressing the heat sink onto the CPU. A pair of hooks is inwardly formed from distal ends of the arms respectively, for engaging with a pair of retaining ears at opposite sides of the CPU socket. The contact points of the pressing portion enable the heat sink to be securely fastened to the CPU on the CPU socket.
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:


REFERENCES:
patent: 4716494 (1987-12-01), Bright et al.
patent: 5448449 (1995-09-01), Bright et al.
patent: 5771155 (1998-06-01), Cook
patent: 6424530 (2002-07-01), Lee et al.
patent: 6518507 (2003-02-01), Chen

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