Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2002-06-11
2003-07-29
Gandhi, Jayprakash N (Department: 2841)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S709000, C361S801000, C257S718000, C024S457000, C248S510000
Reexamination Certificate
active
06600650
ABSTRACT:
BACKGROUND OF THE INVENTION
I. Field of the Invention
This invention relates generally to a fastening device of the CPU heat sink and, more specifically, to a fastening device of the CPU heat sink that to reduce the material cost, and simplify the manufacturing process to fasten the fan onto the heat dissipating plate without any tool to reduce the manufacturing cost.
II. Description of the Prior Art
Heretofore, it is known a CPU heat sink as shown in
FIG. 1
, the heat sink
1
consists of: a base
10
with a plurality numbers of heat dissipating plate
20
, the heat dissipating plate
20
is made of a long thin metal sheet folded continuously to form a square wave shape heat dissipating area with top and bottom in “U” shape. A fan
30
is fixed on top center of the heat dissipating area. The contact area
11
of the base
10
contacts directly with CPU
40
on mainboard, the heat dissipating plate
20
dissipates heat generated by the CPU
40
, the fan
30
blows air that further conducts heat out of the mainboard.
Since on top of the heat dissipating plate
20
is very difficult to have screw holes, therefore the way to have the fan
30
fixed on the heat dissipating plate
20
of the known heat sink
1
, as shown in
FIG. 1
, is to have a frame
50
on top or surround the heat dissipating plate
20
, then open a big airflow hole
51
, and have screw hole
52
corresponding to fixing hole
31
of the fan
30
to have screws
32
fix fan of top of the frame
50
. The frame adds extra cost and extra labor to have those screws to fix the fan.
SUMMARY OF THE INVENTION
It is therefore a primary object of the invention to provide a fastening device of the CPU heat sink to reduce material cost, and simplify the manufacturing process to fasten the fan onto the heat dissipating plate without any tool to reduce the manufacturing cost.
In order to achieve the objective set forth, a fastening device of the CPU heat sink in accordance with the present invention comprises two identical fasteners, the side view of the fastener is in 90°, the fastener is in long rectangle shape, a fixing part is on both top ends of the fastener that corresponds to the fixing hole of the fan; at least one hook is on bottom of the fastener that corresponds to the fastening hole of the fan heat dissipating plate; the fixing part and the hook are tied together with a elastic arm. The fixing part of the fastener is placed into the fixing hole of the fan first, then the hook of the fastener is pressed into the fastening hole of the fan heat dissipating plate without any tool, a elastic arm is between and ties the top fixing part and the bottom hook, the fan is fixed firmly on top of the heat dissipating plate by the elastic arm.
BRIEF DESCRIPTION OF THE DRAWINGS
REFERENCES:
patent: 5299632 (1994-04-01), Lee
patent: 5495392 (1996-02-01), Shen
patent: 5701951 (1997-12-01), Jean
patent: 6160704 (2000-12-01), Rusate
patent: 6487079 (2002-11-01), Katsui
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