Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
2002-02-04
2004-03-23
Tolin, Gerald (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C165S080300, C415S213100, C454S184000
Reexamination Certificate
active
06711015
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a device for cooling a CPU chip; in particular, the invention relates to a CPU cooling device attached without the use of fasteners.
2. Description of the Related Art
With developments in the computer and the electronic technologies, efficiency of the central processing unit (CPU) has been improved dramatically. The CPU chip generates heat during operation that must be dissipated to avoid damage to the CPU chip. Therefore, it is necessary to aid the dissipation of internally generated heat by the use of a cooling device.
A wide variety of cooling device designs has been employed for dissipation of internally generated heat from the CPU chip. For example, a conventional CPU cooling device is shown in FIG.
1
. The cooling device comprises a heat sink
1
, a bracket
2
and a cooling fan
25
. The heat sink
1
is disposed on the CPU chip
30
.
The heat sink
1
includes a plurality of rows and/or columns of fins
11
extending upwardly from an upper side of the based plate of the heat sink
1
, wherein two separate grooves
13
are defined between each adjacent fin block
15
. The bracket
2
includes a hole
21
defined in an appropriate portion thereof, and a support member
23
provided in the hole
21
and connected to the periphery defining the hole
21
by a plurality of ribs
22
extending to the support member
23
. A stud
24
is formed on an upper side of the support member
23
and includes a second hole (not labeled) defined therein for rotationally receiving a rotor shaft of the fan
25
.
After the bracket
2
, receiving the fan
25
, is mounted on the heat sink
1
, the whole cooling device is fixed on the CPU chip
30
by the use of screws
40
. The screws
40
, passing through through-holes (not shown) of the heat sink
1
, screw into screw hole
31
of the CPU chip
30
.
There are other mounting aspects to the cooling device. For example, the bracket is fixed at the chassis of the computer by the screws. However, the fan assembly, comprising the fan and the bracket, is typically mounted with fasteners, such as screws. This method of attachment is more costly and time consuming.
SUMMARY OF THE INVENTION
In order to address the disadvantages of the aforementioned cooling device, the invention provides a cooling device attached without the use of fasteners.
Accordingly, the invention provides a CPU chip-cooling device. The CPU chip is disposed on a chassis, and the cooling device comprises a heat sink, a bracket and a fan. The heat sink is disposed on the CPU chip. The bracket, having at least one pivot portion and at least one retention portion, is pivotally disposed on the chassis by the pivot portion. The fan is disposed on the bracket. The fan is adjacent to the heat sink when the bracket engages with the chassis by the retention portion. The fan is away from the heat sink when the retention portion of the bracket does not engage with the chassis.
Furthermore, the chassis is provided with at least one pivot recess and at least one retention recess, and the pivot portion is provided with at least one pivot post corresponding to the pivot recess, and the retention portion is provided with at least one retention post corresponding to the retention recess.
Furthermore, the bracket is provided with a first engaging portion, and the fan is provided with a second engaging portion corresponding to the first engaging portion. The first engaging portion comprises at least one raised pad and at least one locator post. The raised pad is integrally formed on the bracket, and the locator post is integrally formed on the raised pad. The second engaging portion comprises at least one locator recess corresponding to the locator post.
Furthermore, the bracket is provided with at least one retaining hook for retaining the fan in position.
Furthermore, the invention provides a fan assembly comprising a bracket and a fan. The bracket is provided with at least one first engaging portion and at least one retaining hook. The fan, having a second engaging portion corresponding to the first engaging portion, is disposed on the bracket by the retaining hook and the engagement of the first engaging portion and the second engaging portion.
REFERENCES:
patent: 5495389 (1996-02-01), Dewitt et al.
patent: 5707282 (1998-01-01), Clements et al.
patent: 6164369 (2000-12-01), Stoller
patent: 6269001 (2001-07-01), Matteson et al.
patent: 6478284 (2002-11-01), Qiu
Karl Rex
Syring Harold
Acer Inc.
Tolin Gerald
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