U.S. patent application number 09/855494 was filed with the patent office on 2002-02-28 for heat sink.
Invention is credited to Shih, Ming Fa.
Application Number | 20020024796 09/855494 |
Document ID | / |
Family ID | 21671917 |
Filed Date | 2002-02-28 |
United States Patent
Application |
20020024796 |
Kind Code |
A1 |
Shih, Ming Fa |
February 28, 2002 |
HEAT SINK
Abstract
A heat sink includes a bottom heat sink unit having parallel
upright fins, and a top heat sink unit having parallel bottom fins
respectively forced into engagement with the upright fins of the
bottom heat sink at one side, and two hook plates respectively
hooked in respective mounting grooves on the bottom heat sink unit
and the top heat sink unit to secure the two heat sink units
together.
Inventors: |
Shih, Ming Fa; (Chia Yi
Hsien, TW) |
Correspondence
Address: |
BACON & THOMAS, PLLC
625 Slaters Lane, 4th Floor
Alexandria
VA
22314-1176
US
|
Family ID: |
21671917 |
Appl. No.: |
09/855494 |
Filed: |
May 16, 2001 |
Current U.S.
Class: |
361/703 ;
257/E23.099; 257/E23.103; 361/688; 361/709 |
Current CPC
Class: |
H01L 2924/00 20130101;
H01L 23/467 20130101; H01L 2924/0002 20130101; H01L 23/3672
20130101; H01L 2924/0002 20130101 |
Class at
Publication: |
361/703 ;
361/688; 361/709 |
International
Class: |
H05K 007/20 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 24, 2000 |
TW |
089214627 |
Claims
What the invention claimed is:
1. A heat sink comprising: a bottom heat sink unit, said bottom
heat sink unit comprising a plurality of transversely extended
upright fins, and two side rails transversely disposed at two
opposite lateral sides thereof, said side rails each comprising a
first horizontal mounting groove, and a second horizontal mounting
groove for receiving fastener means adapted to secure said bottom
heat sink unit to a CPU module; a top heat sink unit fastened to
said bottom heat sink unit at a top side, said top heat sink unit
comprising a plurality of transversely extended bottom fins
respectively forced into engagement with the upright fins of said
bottom heat sink unit at one side, a circular top recess disposed
at the center of a top sidewall thereof and adapted to receive a
fan, two top locating grooves transversely disposed at the top
sidewall and cut through the border of said circular top recess at
two opposite sides and adapted to receive tie screws that fasten a
fan to said circular top recess, and two coupling flanges
transversely disposed at two opposite lateral sides and
respectively coupled to first and last upright fins of said bottom
heat sink unit, said coupling flanges each having a horizontal
mounting groove; and two hook plates respectively hooked in the
horizontal mounting groove of each of said coupling flanges and the
first horizontal mounting grooves of each of said side rails to
secure the top heat sink unit and said bottom heat sink unit
together.
2. The heat sink of claim 1 wherein the first and last upright fins
of said bottom heat sink unit each comprises a positioning groove
in the respective topmost edge, and said coupling flanges of said
top heat sink unit each have a positioning rib respectively engaged
into the positioning groove in the topmost edge of each of the
first and last upright fins of said bottom heat sink unit.
3. A heat sink comprising: a bottom heat sink unit, said bottom
heat sink unit comprising a plurality of transversely extended
upright fins, and a longitudinal mounting groove cut through said
upright fins on the middle; and a top heat sink unit fastened to
said bottom heat sink unit at a top side, said top heat sink unit
comprising a plurality of transversely extended bottom fins
respectively forced into engagement with the upright fins of said
bottom heat sink unit at one side, a longitudinal mounting groove
cut through said bottom fins on the middle and fitting the
longitudinal mounting groove of said bottom heat sink unit for
mounting, and a plurality of peripheral ribs disposed at a top
side.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a heat sink adapted to
dissipate heat from a CPU.
[0002] In order to enhance the heat dissipation efficiency of a
heat sink, the heat dissipation area must be relatively increased.
FIG. 1 shows a heat sink according to the prior art. This structure
of heat sink is extruded from aluminum, comprising a flat bottom
panel 11 and parallel radiation fins 2 perpendicularly extended
from the top surface of the flat bottom panel 11. In order to
increase the heat dissipation area, the radiation fins 2 are made
as longer as possible. However, due to aluminum extrusion technical
problem, there is a limitation to the length of the radiation fins
2.
SUMMARY OF THE INVENTION
[0003] The present invention has been accomplished under the
circumstances in view. It is the main object of the present
invention to provide a heat sink, which provides a big heat
dissipation area to dissipate heat efficiently. According to one
aspect of the present invention, the heat sink comprises a bottom
heat sink unit having parallel upright fins, and a top heat sink
unit having parallel bottom fins respectively forced into
engagement with the upright fins of the bottom heat sink, and two
hook plates respectively hooked in respective mounting grooves on
the bottom heat sink unit and the top heat sink unit to secure the
two heat sink units together. According to another aspect of the
present invention, the top heat sink unit has a circular top recess
and two locating grooves at two sides of the circular top recess
for the mounting of a fan.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] FIG. 1 is an elevational view of a heat sink according to
the prior art.
[0005] FIG. 2 is an elevational view of a heat sink according to a
first embodiment of the present invention.
[0006] FIG. 3 is an exploded view of the heat sink shown in FIG.
2.
[0007] FIG. 4 is an elevational view of a heat sink according to a
second embodiment of the present invention (before processing of
the top heat sink unit).
[0008] FIG. 5 is an elevational view of the heat sink of the second
embodiment of the present invention, showing the top heat sink unit
processed.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0009] Referring to FIGS. 2 and 3, a heat sink 100 is shown
generally comprised of a top heat sink unit 2, and a bottom heat
sink unit 3. The top heat sink unit 2 comprises a plurality of
transversely extended bottom fins 21, a circular top recess 22
disposed at the center of the top sidewall thereof and adapted to
receive a fan (not shown), two top locating grooves 23 transversely
disposed at the top sidewall and cut through the border of the
circular top recess 22 at two opposite sides and adapted to receive
tie screws that fasten the fan to the circular top recess 22, and
two coupling flanges 24 transversely disposed at two opposite
lateral sides. The coupling flanges 24 each have a horizontal
mounting groove 25. The bottom heat sink unit 3 comprises a
transversely extended upright fins 31, and two side rails 32
transversely disposed at two opposite lateral sides. The side rails
32 each comprises two horizontal mounting grooves 33;33a disposed
at different elevations. During assembly process of the heat sink
100, the transversely extended bottom fins 21 of the top heat sink
unit 2 are respectively vertically inserted into gaps in between
the transversely extended upright fins 31 of the bottom heat sink
unit 3 from the top side, permitting the bottom fins 21 of the top
heat sink unit 2 to be respectively forced into engagement with the
upright fins 31 of the bottom heat sink unit 3 at one side, and
then two hook plates 4 are respectively hooked in the horizontal
mounting groove 25 of each of the coupling flanges 24 and the upper
horizontal mounting grooves 33 of each of the side rails 32 to
secure the top heat sink unit 2 and the bottom heat sink unit
firmly together. During installation of the heat sink 100, clamp
means or the like is fastened to the lower horizontal mounting
grooves 33a of each of the side rails 32 to secure the heat sink
100 to the CPU module. Furthermore, the first and last upright fins
31 of the bottom sink heat unit 3 are relatively taller than the
other upright fins, each having a positioning groove in the topmost
edge. The coupling flanges 24 each have a positioning rib 26
respectively engaged into the positioning groove 34 in the topmost
edge of each of the first and last upright fins 31 of the bottom
heat sink unit 3.
[0010] FIGS. 4 and 5 show a heat sink 200 according to a second
embodiment of the present invention. The heat sink 200 is comprised
of a top heat sink unit 5 and a bottom heat sink unit 6. The top
heat sink unit 5 comprises a plurality of transversely extended
bottom fins 51. The bottom heat sink unit 6 comprises a plurality
of transversely extended upright fins 61 respectively forced into
engagement with the bottom fins 51 of the top heat sink unit 5.
When assembled, the top heat sink 5 is processed to provide top
peripheral ribs 52 and a longitudinally extended middle mounting
groove 53 for receiving fastener means adapted to secure the heat
sink 200 to the CPU module.
[0011] A prototype of heat sink has been constructed with the
features of FIGS. 2-5. The heat sink functions smoothly to provide
all of the features discussed earlier.
[0012] Although particular embodiments of the invention have been
described in detail for purposes of illustration, various
modifications and enhancements may be made without departing from
the spirit and scope of the invention. Accordingly, the invention
is not to be limited except as by the appended claims.
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