Snapping device for CPU cooler

Details Snapping device for CPU cooler Snapping device for CPU cooler

2002-11-19

2003-12-16

Tolin, Gerald (Department: 2835)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C024S278000, C248S510000, C257S719000

Reexamination Certificate

active

06665188

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to fastening of a cooler on CPU (central processing unit) and more particularly to an improved snapping device for reliably fastening the CPU cooler and increasing a heat dissipation capability of the CPU cooler.
BACKGROUND OF THE INVENTION
A conventional CPU cooling assembly is shown in FIG.
1
A. As shown, it comprises a fastening resilient strip
9
including a main body
91
, two arms
92
at both ends, and two openings
93
at both arms
92
. A hollow four-sided support
82
is provided around a plurality of apertures
86
arranged as two enclosed squares on a circuit board
81
. Two tabs
83
are formed on opposite sides of the support
82
. Further, the tabs
83
are disposed corresponding to the openings
93
. It is possible of inserting the tabs
83
into the openings
93
after a CPU
84
is secured on the apertures
86
. Also, the main body
91
is pressed on a central channel
801
of a cooler
80
. Hence, the cooler
80
is secured onto the CPU
84
. As an end, heat generated by the running CPU
84
can be driven away via the cooler
80
.
As stated above, the cooler
80
is secured onto the CPU
84
so as to absorb heat generated by the running CPU
84
prior to driving away heat via fins
802
of the cooler
80
. As such, an optimum pressure should be exerted on the CPU
84
by the cooler
80
. A poor heat conduction may be occurred between the cooler
80
and the CPU
84
if the pressure exerted on the cooler
80
by the main body
91
is not enough. This is true for the conventional CPU cooling assembly since the pressure exerted on the cooler
80
by the fastening resilient strip
9
is mainly caused by the fastening of the tabs
83
and the openings
93
at the arms
92
. Further, apparently such pressure is not sufficient to appropriately press the cooler
80
on the CPU
84
.
A solution to the above problem of insufficient pressure is illustrated in FIG.
1
B. As shown, each arm
92
is bent to form a horizontal positioning member
94
with the opening
93
provided thereat. In assembly, a plurality of screws (two are shown)
95
are driven through the openings
93
to secure the fastening resilient strip
9
to the circuit board
81
. It is advantageous since the fastening resilient strip
9
is able to exert a sufficient pressure on the cooler
80
. However, for the purpose of exerting a uniform pressure on the cooler
80
a simple single driving of either screw
95
is not adopted. Instead, a stepwise technique of advancing one screw
95
a predetermined distance and then advancing the other screw
95
the same predetermined distance in alternate is implemented until the fastening resilient strip
9
is secured to the circuit board
81
. Inevitably, it is a time-consuming process, resulting in a contradiction to mass production implemented in a long period of time. Thus, it is desirable to provide an improved snapping device in order to overcome the above drawbacks of the prior art.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a snapping device for reliably fastening a cooler on a CPU and increasing a heat dissipation capability of the cooler. By utilizing this snapping device, it is possible of overcoming the drawback of the first prior art such as poor heat conduction between the cooler and the CPU since there is no sufficient pressure exerted on the cooler and the drawbacks of the second prior art such as a uniform pressure on the cooler being difficult which in turn causes a poor heat conduction between the cooler and the CPU, and a time-consuming assembly process.
To achieve the above and other objects, the present invention provides a snapping device comprising a fastening resilient strip including a main body; at least one bolt parallel to the fastening resilient strip; a contact section moveable along the shank of either bolt; and a hollow support secured to a circuit board having a central hole for receiving an element mounted on the circuit board, wherein a cooler is mounted in the support and is in contact with the top of the element for dissipating heat generated by the element so as to achieve the purpose of quickly securing the fastening resilient strip to the circuit board and securing the cooler to the element on the circuit board. At this position, the fastening resilient strip is secured to the support and the contact section is on the cooler. In response to a rotation of the at least one bolt, the contact section moves along the bolt. As such, the contact section moves toward the cooler because a reaction is occurred in the main body, the cooler is pressed on the element consequently. As an end, the cooler is in an optimum contact with the element.


REFERENCES:
patent: 5220485 (1993-06-01), Chakrabarti
patent: 5546275 (1996-08-01), Moutrie et al.
patent: 6480386 (2002-11-01), Yu

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