Electricity: conductors and insulators – With fluids or vacuum – Boxes and housings
Reexamination Certificate
2000-10-30
2001-10-02
Reichard, Dean A. (Department: 2831)
Electricity: conductors and insulators
With fluids or vacuum
Boxes and housings
C361S709000, C257S706000
Reexamination Certificate
active
06297444
ABSTRACT:
FIELD OF THE INVENTION
The present invention is related to a fixing device, and especially to a fixing device having three elastic fixers for fixing a heat sink in X, Y, and Z directions.
BACKGROUND OF THE INVENTION
As the size of an electronic devices are getting smaller and smaller, the heat-generating amount in a unit area of the electronic device is increased seriously. Therefore, how to increase the heat-dissipating efficiency is a very important task.
The heat generated from an electronic device is usually dissipated by using a fan. There are many kinds of fans. Some are disposed on a high-powered electronic device, such as the central processing unit (CPU), and some are disposed on the computer case for increasing the heat convection in the case. Among them, a specific kind of fan is disposed on a gliding tube for gliding the air-current generated from the fan on the electronic device directly to improving the heat-dissipating efficiency.
Conventionally, the fan and the guiding tube are assembled together by screws. As shown in
FIG. 1
, there are many screw holes
12
on the frame
11
of the fan, and screws
13
are screwed into the holes
12
to assemble the fan on an opening of a guiding tube. Therefore, a screwdriver is an indispensable for assembling or disassembling the fan and guiding tube. Obviously, assembling and disassembling the fan by screws is very time-consuming and seriously increases the production costs.
In addition, assembling the fan and guiding tube by screws will inevitably remain a seam between the fan and tube because they call not be assembled very tight by screws. Therefore, some air will be leaking from the seam to weaken the air-current blown on the electronic device so that the lheat-dissipating efficiency of the fan is lowered.
It is therefore attempted by the present applicant to deal with the above situation encountered with the prior art.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a novel fixing device for depositing a heat sink on an opening of a gliding tube without using any screw so that the heat sink can be assembled or disassembled easily.
Another object of the present invention is to provide a novel fixing device for depositing a heat sink on an opening of a gliding device, wherein there is no seam between the opening and the heat sink to prevent a gas-current from leaking.
The fixing device includes a circular rib set around the opening for depositing the heat sink and sealing seams between the opening and the heat sink when the heat sink is assembled onto the opening, a first elastic fixer set on the circular rib and having a first inclined plane for fixing the heat sink on the opening by pushing the first inclined plane against the heat sink along a first direction, a second elastic fixer set on the circular rib and having an indent for fixing the heat sink on the opening by locking the heat sink in the indent to prevent the heat sink from moving along a second direction, and a third elastic fixer set on the circular rib and having a second inclined plane for fixing the heat sink on the opening by pulsing the second inclined plane against the heat sink along a third direction.
The heat sink preferably is a fan. The first, second, and third directions of the present invention are X, Y, and Z directions and they are perpendicular to each other.
The present invention may best be understood through the following description with reference to the accompanying drawings, in which:
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patent: 5548481 (1996-08-01), Salisbury et al.
patent: 5953212 (1999-09-01), Lee
patent: 5973261 (1999-10-01), Chevallet et al.
patent: 6055159 (2000-04-01), Sun
patent: 6118662 (2000-09-01), Hutchison et al.
patent: 6143978 (2000-11-01), Ren et al.
patent: 6166327 (2000-12-01), Saito et al.
patent: 406125182 (1994-05-01), None
Chuang Te-Tsai
Huang Wen-Shi
Lin Kuo-Cheng
Delta Electronics , Inc.
Niro Scavone Haller & Niro
Patel Dhiru R
Reichard Dean A.
Vogt Keith A.
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