Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2001-04-05
2002-05-21
Picard, Leo P. (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S695000, C361S704000, C257S718000, C257S719000, C257S722000, C257S727000, C174S016300, C165S080300, C165S185000, C024S458000
Reexamination Certificate
active
06392885
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a holder, and particularly to a fan holder for attaching a fan to a heat sink.
2. Description of Related Art
Computer electronic devices such as central processing units (CPUs) generate a lot of heat during normal operation. This can deteriorate their operational stability and damage associated electronic equipment. Thus the heat must be removed quickly to ensure normal operation. A heat dissipation device is often attached to a top surface of a CPU, to remove heat therefrom.
Referring to
FIG. 5
, a conventional heat dissipation device
100
comprises a heat sink
120
and a fan
140
. The fan
140
is secured on the heat sink
120
by screws
160
engaging with threads defined in fins
122
of the heat sink
120
. Spaces between the adjacent fins
122
which accommodate the screws
160
are required to be larger than other spaces between other adjacent fins
122
. Thus all the spaces between adjacent fins
122
are not uniform. This makes manufacturing of the heat sink
120
more complicated.
Furthermore, contemporary CPUs generate unprecedented amounts of heat, which has resulted in large height-to-width ratios of fins of modem heat sinks. The fins of such heat sinks are thin. Thus, in assembly, the fins
122
of the heat dissipation device
100
are prone to deform. Later, during normal operation of the heat dissipation device
100
, the screws
160
are liable to gradually disengage from the fins
122
.
Moreover, during securing of the screws
160
with the fins
122
of the heat sink
120
, fragments are often torn away from the fins
122
. The fragments are deposited in the spaces between adjacent fins
122
, thereby decreasing the efficiency of heat dissipation.
Examples of conventional heat dissipation devices are disclosed in Taiwan Patent Applications Nos. 85207163 and 86216714.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a fan holder which can securely attach a fan to a heat sink.
Another object of the present invention is to provide a fan holder which can readily attach a fan to a heat sink.
In order to achieve the above-mentioned objects, a fan holder for attaching a fan to a heat sink in accordance with the present invention comprises a base defining a vent for allowing air flow, two pairs of legs, two pairs of posts around the vent and a pair of positioning blocks. The legs depend from the base, and each leg has a hook for engaging with the heat sink. A pair of handles extends upwardly from one pair of legs, for facilitating disassembly of the holder. A pair of slots is defined in the base on opposite sides of each leg, for facilitating deformation of the leg. The posts extend upwardly from the base, for being received in corresponding holes of the fan. Each post has a resilient tab and a notch. The tabs elastically deform and firmly attach the fan on the fan holder. The positioning blocks are formed under the base, on opposite sides of the vent and perpendicular to the hooks.
Other objects, advantages and novel features of the invention will become more apparent from the following detailed description of the preferred embodiments when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 5495392 (1996-02-01), Shen
patent: 5615998 (1997-04-01), Kodama et al.
patent: 5677829 (1997-10-01), Clemens
patent: 5724228 (1998-03-01), Lee
patent: 6017185 (2000-01-01), Kuo
patent: 6118687 (2000-09-01), Clemens
Lee Dong-yun
Lee Hsieh Kun
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