Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2000-02-29
2001-05-01
Tolin, Gerald (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C024S625000, C257S719000
Reexamination Certificate
active
06226186
ABSTRACT:
FILED OF THE INVENTION
The present invention relates to a fastener for CPU radiating module, and more particularly to an integrally formed fastener for CPU radiating module that includes pressing part and control part having enhanced strength to resist against quick elastic fatigue and has a handle portion provided with anti-skid serrated surface for an operator to manipulate the fastener more stably.
DESCRIPTION OF THE PRIOR ART
A CPU radiating module, as shown in
FIG. 3
, usually includes a CPU
5
, a CPU seat
6
to a top of which the CPU
5
is connected, and a fin radiator
4
attached to a top of the CPU
5
. The CPU
5
produces a large amount of heat during its operation. To effectively absorb and then radiate the heat produced by the CPU
5
, the fin radiator
4
above the CPU
5
usually includes a plurality of fins in order to increase a contact area of the fin radiator
4
with the air and must be firmly attached to the CPU
5
by means of a fastener. To allow the fastener to firmly hold the fin radiator
4
and the CPU
5
and the CPU seat
6
together, the CPU seat
6
is provided at a first end and a second end with first and second catches
61
,
62
, respectively, for engaging with two ends of the fastener.
FIGS. 1 and 2
illustrate two conventional fasteners
1
and
2
for firmly holding the fin radiator
4
to the CPU
5
and the CPU seat
6
, so that they together form an integral unit with high heat-radiating efficiency.
The conventional fastener
1
for a CPU radiating module as shown in
FIG. 1
mainly includes a pressing plate
11
and a control plate
12
connected to a first end of the pressing plate
1
. The pressing plate
11
has an elongated body and is slightly downward bent near a middle point thereof. The pressing plate
11
is provided at a second end opposite to the first end with a downward bent tail
111
on which a second retaining hole
112
is provided for engaging with the second catch
62
on the CPU seat
6
. The first end of the pressing plate
11
is in the form of a U-shaped head
122
to which the control plate
12
is connected. A free end of the control plate
12
provides a hook-shaped handle
120
. The U-shaped head
122
has a first retaining hole
121
formed thereat for engaging with the first catch
61
on the CPU seat
6
. By pushing down the handle
120
, an operator controls the engagement or release of the first retaining hole
121
with or from the first catch
61
on the CPU seat
6
to press or loosen the fin radiator
4
against or from the CPU
5
.
The conventional fastener
1
for the CPU radiating module is uneasy to manufacture. And, an overall length of the pressing plate
11
and the control plate
12
tends to change when an external force is applied on the fastener
1
and therefore prevents the fin radiator
4
from always firmly and closely contacting with the CPU
5
. Moreover, the fastener
1
, due to its shape, is subject to quick elastic fatigue and provides only pretty weak binding force and therefore causes the fin radiator
4
and the CPU
5
of the CPU radiating module to easily loosely move relative to one another. All these conditions result in a clearance between the fin radiator
4
and the CPU
5
to largely reduce the radiating efficiency of the fin radiator
4
and accordingly shorten the life of the CPU
5
. Furthermore, it is not easy to apply a force on the hook-shaped handle
120
to stably manipulate the control plate
12
.
The conventional fastener
2
for a CPU radiating module as shown in
FIG. 2
mainly includes a pressing plate
21
and a control plate
24
connected to a first end of the pressing plate
21
. The pressing plate
21
has an elongated body and is slightly downward bent near a middle part thereof. The pressing plate
21
is provided at a second end opposite to the first end with a downward bent tail
211
on which a second retaining hole
212
is provided for engaging with the second catch
62
on the CPU seat
6
. The first end of the pressing plate
21
is provided with a hole
22
from where the first end is outward split into two arms
23
that may be elastically separated from one another by some extent in order to clamp the control plate
24
therebetween. The control plate
24
is provided at a lower part with a first retaining hole
241
and at two lateral sides with a notch
242
each. By positioning the control plate
24
between the two arms
23
with inner edges of the arms
23
engaging into the notches
242
, the control plate
24
is fixedly connected to the first end of the pressing plate
21
. An upper part of the control plate
24
is bent backward toward the second of the pressing plate
21
to provide a handle
240
.
The conventional fastener
2
for the CPU radiating module is also uneasy to manufacture. The pressing plate
21
and the two arms
23
thereof is subject to quick elastic fatigue, and the control plate
24
tends to move between or even separate from the arms
23
when an external force is applied on the control plate
24
, preventing the pressing plate
21
from being firmly depressed down to effectively hold the fin radiator
4
, the CPU
5
and the CPU seat
6
together. That is, there would be a clearance existing between the fin radiator
4
and the CPU
5
to largely reduce the radiating efficiency of the fin radiator
4
and accordingly shorten the life of the CPU
5
. Furthermore, it is not easy to apply a force on the backward bent handle
240
to stably manipulate the control plate
24
.
Therefore, it is desirable to develop an improved fastener for a CPU radiating module to eliminate the drawbacks existing in the conventional fasteners for such purpose and to increase the radiating efficiency of the fin radiator
4
to prolong the life of CPU
5
.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide a fastener for CPU radiating module that can be easily manufactured at reduced labor cost and time.
Another object of the present invention is to provide a fastener for CPU radiating module that can be conveniently and stably manipulated via a partially serrated handle to firmly clamp the fin radiator and the CPU together to ensure the radiating efficiency of the fin radiator.
REFERENCES:
patent: 5873406 (1999-02-01), Horng
patent: 5933325 (1999-08-01), Hou
patent: 6071128 (2000-06-01), Brewington
patent: 6108207 (2000-08-01), Lee
patent: 6111752 (2000-08-01), Huang
Spring-Clip—Sink, IBM Tech Disc Bull vol. 23 No 12 May 1981, pD 5303, Almquist.
Dougherty & Troxell
Tolin Gerald
Yang Ya-Wen
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