U.S. patent application number 11/744817 was filed with the patent office on 2008-11-06 for holding device for a heat sink.
Invention is credited to HSIN-CHENG LIN.
Application Number | 20080273310 11/744817 |
Document ID | / |
Family ID | 39855632 |
Filed Date | 2008-11-06 |
United States Patent
Application |
20080273310 |
Kind Code |
A1 |
LIN; HSIN-CHENG |
November 6, 2008 |
HOLDING DEVICE FOR A HEAT SINK
Abstract
A holding device for a heat sink being attached to a circuit
board includes a back plate and a frame member. The back plate
provides a plurality of fixing posts with a free end of the
respective fixing post having a neck recess piecing the circuit
board and each of the fixing posts being surrounded with a spring.
The frame member provides a plurality of corners with a support leg
vertically extending from the corners respectively and a first flat
fixing ear horizontally extending outward from the corners. The
first fixing ear has a first elongated hole with a first end part
for being pierced by the fixing post and a second end part for
fitting with the neck recess. The first elongated hole extends from
the first end part to the second end part in a way of allowing the
frame member being moved along a direction before the second end
part fitting with neck recess.
Inventors: |
LIN; HSIN-CHENG; (Kaohsiung,
TW) |
Correspondence
Address: |
G. LINK CO., LTD.
3550 BELL ROAD
MINOOKA
IL
60447
US
|
Family ID: |
39855632 |
Appl. No.: |
11/744817 |
Filed: |
May 4, 2007 |
Current U.S.
Class: |
361/719 ;
361/709 |
Current CPC
Class: |
H01L 2023/4081 20130101;
H01L 23/4006 20130101; H01L 2924/0002 20130101; H01L 2924/00
20130101; H01L 2023/4056 20130101; H01L 2023/4087 20130101; H01L
2924/0002 20130101; H01L 2023/405 20130101; H01L 2023/4062
20130101 |
Class at
Publication: |
361/719 ;
361/709 |
International
Class: |
H05K 7/20 20060101
H05K007/20 |
Claims
1. A holding device for a heat sink being attached to a circuit
board comprising: a back plate providing a plurality of fixing
posts with a free end of the respective fixing post having a neck
recess piecing the circuit board and each of the fixing posts being
surrounded with a spring; and a frame member providing a plurality
of corners with a support leg vertically extending from the corners
respectively and a first flat fixing ear horizontally extending
outward from the corners respectively, the first fixing ear having
a first elongated hole with a first end part for being pierced by
the fixing post and a second end part for fitting with the neck
recess and the first elongated hole extending from the first end
part to the second end part in a way of allowing the frame member
being moved along a direction before the second end part fitting
with neck recess.
2. The holding device as defined in claim 1, wherein a second flat
fixing ear with a second elongated hole extends outward from the
support leg corresponding to the first fixing ear for being pieced
with the respective fixing post.
3. The holding device as defined in claim 1, wherein the frame
provides a configuration to comply with what shape of the heat
sink.
4. The holding device as defined in claim 1, wherein the neck
recess has a diameter smaller than that of the respective fixing
post.
5. The holding device as defined in claim 1, wherein the spring is
compression spring.
6. The holding device as defined in claim 1, wherein the elongated
holes extend a direction toward a corner of the fixing ears
respectively or toward a lateral side of the fixing ears
respectively.
7. A holding device for a heat sink being attached to a circuit
board comprising: a plurality of fixing posts extends from the
circuit board with a free end of the respective fixing post having
a neck recess piecing the circuit board and each of the fixing
posts being surrounded with a spring; and a frame member providing
a plurality of corners with a support leg extending from the
corners respectively, extending outward a first flat fixing ear
from the corners respectively, the first fixing ear having a first
elongated hole with a first end part for being pierced by the
fixing post and a second end part for fitting with the neck recess
and the first elongated hole extending from the first end part to
the second end part in a way of allowing the frame member being
moved along a direction before the second end part fitting with
neck recess.
8. The holding device as defined in claim 7, wherein a second flat
fixing ear with a second elongated hole extends outward from the
support leg corresponding to the first fixing ear for being pieced
with the respective fixing post.
9. The holding device as defined in claim 7, wherein the frame
provides a configuration to comply with what shape of the heat
sink.
10. The holding device as defined in claim 7, wherein the neck
recess has a diameter smaller than that of the respective fixing
post.
11. The holding device as defined in claim 7, wherein the spring is
compression spring.
12. The holding device as defined in claim 7, wherein the elongated
holes extend a direction toward a corner of the fixing ears
respectively or perpendicular to a lateral side of the fixing ears
respectively.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention is related to a holding device for a
heat sink and particularly to a holding device capable of being
detachably joined to a heat sink conveniently, saving material and
suitable for heat sinks in different configuration.
[0003] 2. Brief Description of the Related Art
[0004] Heat dissipation for a central processing unit (CPU) is kept
as an important research subject along with electronic technology
development. There are a variety of heat sinks available for
different CPU's. The computer technique is getting to become a
common sense to the consumers and a trend to set up a computer is
getting popular such that a holding device capable of enhancing
heat dissipation effect of a heat sink and being operated
conveniently is one of hot products at the present time.
[0005] Taiwan Utility Model No. M253204 entitled "ENGAGING DEVICE
FOR A HEAT SINK" discloses a back plate and a plurality of engaging
pieces to attach a heat sink to a circuit board and contact with a
heat generating electronic component. The back plate has a
plurality of posts extending upward from the plate and each post
has an annular recess near the upper end thereof. Each engaging
piece forms a holding part at an edge thereof extending to another
edge from the middle thereof to constitute an elastic piece. The
elastic piece has an elongated groove at the center thereof. The
posts pass through a circuit board and the heat sink in a way of
the annular groove fitting with the elongated groove such that the
heat sink is held.
[0006] However, the base of the preceding engaging device has a
constant elevation difference from the back plate so that it is
suitable for one or two sizes of circuit board only. As a result,
many different types engaging devices have to be fabricated
individually with a lot of cost for making a specific die
respectively. Further, in case of errors being produced during
manufacturing process, the heat sink is not held firmly to degrade
the heat dissipation effect. In addition, the preceding engaging
device has lots of engaging parts and it is a very tedious work
while the users set up the heat sink.
SUMMARY OF THE INVENTION
[0007] In order to overcome the preceding problems, an object of
the present invention is to provide a holding device, which is
capable of being set up easily, performing firm engagement and
suitable for circuit boards in different thickness, such that
production cost can be lowered tremendously.
[0008] Accordingly, a holding device for a heat sink being attached
to a circuit board according to the present invention includes a
back plate and a frame member. The back plate provides a plurality
of fixing posts with a free end of the respective fixing post
having a neck recess piecing the circuit board and each of the
fixing posts being surrounded with a spring. The frame member
provides a plurality of corners with a support leg extending
vertically from the corners and a first flat fixing ear extending
horizontally from the corners, respectively. The first fixing ear
has a first elongated hole with a first end part for being pierced
by the fixing post and a second end part for fitting with the neck
recess. The first elongated hole extends from the first end part to
the second end part in a way of allowing the frame member being
moved along a direction before the second end part fitting with
neck recess.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The detail structure, the applied principle, the function
and the effectiveness of the present invention can be more fully
understood with reference to the following description and
accompanying drawings, in which:
[0010] FIG. 1 is a disassembled perspective view of a preferred
embodiment of a holding device for a heat sink the conventional
support device according to the present invention;
[0011] FIG. 2 is an assembled perspective view of FIG. 1;
[0012] FIG. 3 is an assembled perspective view of a holding device
for a heat sink according to the present invention with a circular
heat sink;
[0013] FIG. 4 is a plan view of the frame shown in FIGS. 1 and 2
illustrating the fitting holes provided with another shapes
instead; and
[0014] FIG. 5 is a disassembled perspective view similar to FIG. 1
illustrating the fixing posts being provided on the circuit
board.
DETAILED DESCRIPTION OF THE INVENTION
[0015] Referring to FIG. 1, a holding device for a heat sink
according to the present invention includes a frame member 10, a
heat sink 40, a circuit board 60 and a back plate 60. The circuit
board 60 has a heat generating electronic component 50 and four
fitting holes 61. The frame 10 is in association with the back
plate 20 to hold the heat sink 40 to the circuit board 60 such that
the heat sink 40 keeps contact with the electronic component 50
tightly to help heat generated from the electronic component 50
being dissipated. The heat sink 40 can be a shape of square, a
circle (shown in FIG. 3), a polygon or any other geometry and the
frame member 10 is provided a configuration to comply with the
different shapes of heat sink 40 respectively.
[0016] The back plate 20 provides a plate member 21 with four sides
thereof concave inward and four extending outward corners and a
fixing post 22 extends upward from the four corners respectively
corresponding to the fitting holes 61 with the free end of the
fixing post 22 providing a neck recess 221 and a spring 23 being
arranged to surround the fixing post 22.
[0017] The frame member 10 provides a support leg 11 extending
vertically from four corners thereof respectively and provides a
first flat fixing ear 12a horizontally extending outward from the
four corners thereof respectively. A second flat fixing ear 12b
vertically extends outward from the four support legs to be near
and corresponding to the first fixing ear 12a respectively. The
first fixing ear 12a has an elongated hole with a large circular
end part 121 extending to a second circular end pat 122 toward a
corner of the first fixing ear 12a such that the large circular end
part 121 is passed through with the respective fixing post 22 and
the small circular end part 122 fitting with the neck recess 122.
The second fixing ear 12b has an elongated locating hole 123
corresponding to the elongated hole of the first fixing ear 12a for
being pierced by the fixing post 22. Hence, when the frame 10 is
attached to the heat sink 40, the fixing post 22 pierces the second
fixing ear 12b, the first fixing ear 12a respectively and the
second fixing ear 12b exerts a pressing force to the spring 23.
Under this circumference, the spring 23 is disposed between the
circuit board 60 and the second fixing ear 12b in a way of being
compressed and the second hole end part 122 is in a position
corresponding to the neck recess 122 such that the frame member 10
moves to a position that the neck recess 221 of the free end of the
fixing post 22 fitting with the small circular end part 122. In the
meantime, the spring 23 provides an elastic tension against the
circuit board 60 and the frame member 10 is capable of engaging
with the circuit board 60 firmly.
[0018] Referring to FIG. 4, the elongated hole of the first fixing
ear 12a provides a second end part 322 extending from the first end
part 121 along a direction perpendicular to a lateral side of the
first fixing ear 12a instead of extending toward a corner of the
first fixing ear 12a. The elongated hole of the second fixing ear
12b is provided to extend toward the same direction as the second
end part 322. In this way, the frame member 10 is rotationally
joined to the fixing post 22 so as to hold the circuit board
60.
[0019] Referring to FIG. 5, another embodiment of the present
invention provides the fixing post 22 is joined to the circuit
board with an end thereof directly instead of engaging with the
plate member 21.
[0020] While the invention has been described with referencing to
preferred embodiments thereof, it is to be understood that
modifications or variations may be easily made without departing
from the spirit of this invention, which is defined by the appended
claims.
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