CPU heat sink mounting structure

A CPU heat sink mounting structure which includes a front clamping wire, a rear clamping wire, and a heat sink mounted on a CPU above a CPU mount and secured in place by the clamping wires, wherein the front clamping wire has two hooked tips respectively hooked in a pair of first retaining holes on the heat sink, an arched middle section, two S-shaped clamping arm sections connected between the hooked tips and the arched middle section and clamped on the periphery of the heat sink and the CPU, and two retaining sections bilaterally connected between the S-shaped clamping arm sections and the arched middle section and respectively forced into engagement with respective retainer blocks of the CPU mount; the rear clamping wire has two hooked tips respectively hooked in a pair of second retaining holes on the heat sink, a downward middle section hung on a rib at the rear side of the CPU mount, and two L-shaped clamping arm sections connected between the hooked tips and the downward middle section and clamped on the periphery of the heat sink and the CPU.

BACKGROUND OF THE INVENTION 
The present invention relates to a CPU heat sink mounting structure which 
uses two steel clamping wires to detachably secure a heat sink to a CPU 
mount to hold down a CPU. 
During the operation of the CPU of a computer system, heat must be quickly 
carried away from the CPU so that the CPU can work normally. Various heat 
sinks and fans have been developed for this purpose. When a heat sink is 
used, it must be closely secured to the CPU so that heat can be 
efficiently carried away from the CPU. Conventionally, heat sink mounting 
frames or fixtures are used for securing heat sinks in place. However, 
these heat sink mounting frames and fixtures are complicated to install, 
and cannot be conveniently dismantled after installation. 
SUMMARY OF THE INVENTION 
It is one object of the present invention to provide a CPU heat sink 
mounting structure which can be conveniently installed. It is another 
object of the present invention to provide a CPU heat sink mounting 
structure which can be conveniently dismantled. It is still another object 
of the present invention to provide a CPU heat sink mounting structure 
which is easy and inexpensive to manufacture. According to one embodiment 
of the present invention, the CPU heat sink mounting structure comprises a 
front clamping wire, a rear clamping wire, and a heat sink mounted on a 
CPU above a CPU mount and secured in place by the clamping wires, wherein 
the front clamping wire has two hooked tips respectively hooked in a pair 
of first retaining holes on the heat sink, an arched middle section, two 
S-shaped clamping arm sections connected between the hooked tips and the 
arched middle section and clamped on the periphery of the heat sink and 
the CPU, and two retaining sections bilaterally connected between the 
S-shaped clamping arm sections and the arched middle section and 
respectively forced into engagement with respective retainer blocks of the 
CPU mount; the rear clamping wire has two hooked tips respectively hooked 
in a pair of second retaining holes on the heat sink, a downward middle 
section hung on a rib at the rear side of the CPU mount, and two L-shaped 
clamping arm sections connected between the hooked tips and the downward 
middle section and clamped on the periphery of the heat sink and the CPU. 
According to another embodiment of the present invention, the front 
clamping wire and the rear clamping wire have looped portions for 
fastening to a fan above the heat sink by screws.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIGS. 1 and 2, a heat sink 30 is mounted on a CPU 50 above a 
CPU mount 40, and secured in place by two steel clamping wires, namely, 
the rear clamping wire 10 and the front clamping wire 20. The rear 
clamping wire 10 comprises two hooked tips 11 at two opposite ends 
horizontally facing toward each other, a downward middle section 13, and 
two L-shaped clamping arm sections 12 horizontally disposed at two 
opposite sides and connected between the hooked tips 11 and the downward 
middle section 13. The front clamping wire 20 comprises two hooked tips 21 
at two opposite ends horizontally facing toward each other, an arched 
middle section 24 vertically disposed in the middle, two S-shaped clamping 
arm sections 22 horizontally disposed at two opposite sides and connected 
between the hooked tips 11 and the arched middle section 24, and two 
retaining sections 23 bilaterally connected between the S-shaped clamping 
arm sections 22 and the arched middle section 24. 
Referring to FIGS. 3 and 4, during the installation of the CPU heat sink 
mounting structure, the hooked tips 11 and 21 of the clamping wires 10 and 
20 are respectively hooked in respective retaining holes 32 and 31 at two 
opposite sides of the heat sink 30, the middle section 13 of the rear 
clamping wire 10 is hung on a rear rib 41 at the rear side of the CPU 
mount 40, the two retaining sections 23 are respectively fastened to two 
retainer blocks 42 at the front side of CPU mount 40, the L-shaped 
clamping arm sections 12 of the rear clamping wire 10 and the S-shaped 
clamping arm sections 22 of the front clamping wire 20 are respectively 
clamped on the periphery of said heat sink and said CPU 50. 
Referring to FIGS. 5, 6, and 7, the arm of force L1 of the arched middle 
section 24 is bigger than the arm of force L2 of each of the retaining 
sections 23. When the arched middle section 24 is forced forwardly 
downwards, the retaining sections 23 are forced away from the retainer 
blocks 42, and therefore the heat sink 30 can be quickly removed from the 
CPU 50. 
Referring to FIG. 8, two spaced ribs 41 may be made on the rear side of the 
CPU mount 40 (instead of the aforesaid single rib 41) for mounting the 
middle section 13 of the rear clamping wire 10. 
FIGS. 9 and 10 show an alternate form of the present invention, in which a 
heat sink 30 is mounted on a CPU 50 above a CPU mount 40 to carry a fan 
90, a rear clamping wire 60 and a front clamping wire 70 are fastened to 
the heat sink 30, the fan 90, and the CPU mount 40 to secure them 
together. The rear clamping wire 60 comprises two hooked tips 62 at two 
opposite ends, a downward middle section 64, two L-shaped clamping arm 
sections 63 bilaterally connected between the hooked tips 62 and the 
downward middle section 64, and two looped portions 61 disposed between 
the hooked tips 62 and the L-shaped clamping arm sections 63. The front 
clamping wire 70 comprises a middle section 74, a hooked tip 72 at one 
end, a L-shaped clamping arm section 73, a looped portion 71 connected 
between the hooked tip 72 and the L-shaped clamping arm section 73, an 
actuating arm section 75 extending from one end of the middle section 74 
remote from the L-shaped clamping arm section 73 and terminating in a 
loop-like handle portion 76. 
Referring to FIGS. 11, 12, 13, and 14, during the installation of the 
embodiment of FIG. 10, the looped portions 61 of the rear clamping wire 60 
and the looped portion 71 of the front clamping wire 70 are respectively 
fastened to respective mounting holes 91 of the fan 90 and respective 
mounting holes (not shown) of the heat sink 30 by respective screws 80, 
permitting the hooked tips 62 and 71 to be respectively stopped against 
the periphery of the fan 90, then the middle section 64 of the rear 
clamping wire 60 is hung on the rib 41 of the CPU mount 40, and then the 
handle portion 76 of the front clamping wire 70 is turned by hand to force 
the middle section 74 of the front clamping wire 70 into engagement with 
the retainer blocks 42 of the CPU mount 40. 
It is to be understood that the drawings are designed for purposes of 
illustration only, and are not intended as a definition of the limits and 
scope of the invention disclosed.