U.S. patent application number 09/894094 was filed with the patent office on 2003-01-16 for clip for heat sink.
Invention is credited to Lee, Cheng-Chi, Peng, Xian Cai, Yang, Ming Hung.
Application Number | 20030011991 09/894094 |
Document ID | / |
Family ID | 25402599 |
Filed Date | 2003-01-16 |
United States Patent
Application |
20030011991 |
Kind Code |
A1 |
Peng, Xian Cai ; et
al. |
January 16, 2003 |
CLIP FOR HEAT SINK
Abstract
A clip (10) includes a first member (12) and a second member
(14). The first member includes a spring portion (122), a first leg
(126) extending from one end of the spring portion, and a handle
(128) extending from an opposite end of the spring portion. The
spring portion has flanges (130) extending from opposite sides
thereof and folded back thereover for reinforcing the clip. The
handle defines a cutout (134) including a receiving section (136)
and a locking section (138). The second member includes a connect
portion (144) forming a plurality of teeth (148) on opposite edges
thereof, and a second leg (142). The connect portion is received in
the receiving section and engages in the locking section. A slot
(146) in the connect portion facilitates elastic deformation. The
effective length of the second member is adjustable according to
the particular teeth selected to engage in the locking section.
Inventors: |
Peng, Xian Cai; (Zhenshen,
CN) ; Yang, Ming Hung; (Taipei, TW) ; Lee,
Cheng-Chi; (Taipei, TW) |
Correspondence
Address: |
WEI TE CHUNG
FOXCONN INTERNATIONAL, INC.
1650 MEMOREX DRIVE
SANTA CLARA
CA
95050
US
|
Family ID: |
25402599 |
Appl. No.: |
09/894094 |
Filed: |
June 28, 2001 |
Current U.S.
Class: |
361/703 ;
257/E23.086 |
Current CPC
Class: |
Y10T 29/4935 20150115;
H01L 23/4093 20130101; H01L 2924/0002 20130101; H01L 2924/0002
20130101; H01L 2924/00 20130101 |
Class at
Publication: |
361/703 |
International
Class: |
H05K 007/20 |
Claims
1. A clip adapted to secure a heat sink to an electronic device
mounted on a socket, comprising: a first member comprising a spring
portion, a first leg depending from one end of the spring portion
and adapted to engage with one side of the socket, and a handle
extending from an opposite end of the spring portion, the handle
defining a cutout comprising a receiving section and a locking
section which is smaller than the receiving section; and a second
member connected with the handle, the second member comprising a
connect portion receivable in the receiving section and engaged in
the locking section, and a second leg adapted to engage with an
opposite side of the socket; wherein an effective length of the
second member between the second leg and the engagement of the
connect portion in the locking section is adjustable by way of
adjusting means formed on the connect portion of the second
member.
2. The clip as claimed in claim 1, wherein the adjusting means
comprises a plurality of symmetrically opposite teeth formed on
opposite edges of the connect portion.
3. The clip as claimed in claim 1, wherein a slot is defined in the
connect portion of the second member for facilitating elastic
deformation of the connect portion.
4. The clip as claimed in claim 1, wherein at least one flange
extends from at least one of opposite side edges of the spring
portion of the first member, and each flange is folded back over a
top surface of the spring portion for reinforcing the clip.
5. The clip as claimed in claim 1, wherein a distance between
outmost ends of topmost teeth is greater than a corresponding width
of the receiving section of the first member, for preventing the
second member from slipping out of the cutout of the first
member.
6. The clip as claimed in claim 3, wherein a protrusion is formed
on one edge of the handle of the first member at the cutout and
opposite to the locking section, for being received in the slot of
the second member to pre-position the connect portion of the second
member in the cutout of the first member.
7. An electronic device assembly comprising: a socket having first
and second catches on opposite sides thereof; an electronic device
mounted on the socket; a heat sink placed on the electronic device
for dissipating heat from the electronic device; and a clip
interlocked with said first and second catches for pressing said
heat sink against said electronic device, including a first member
having a spring portion pushing against the heat sink, and a first
leg engaged with said first catch of the socket; and a second
member engaged to said second catch at one end and a connect
portion interlockable with an opening defined in free end of said
spring portion of said first member; wherein said opening is
interlocked in a first position of said connect portion in which
said heat sink is free to move, and a second position in which said
heat sink is securely positioned.
8. A clip for fastening a heat sink to an electronic device,
comprising: a first member comprising a spring portion adapted for
pressing against the heat sink, a first leg depending from an end
of the spring portion, said first leg forming an engaging structure
about a lower end thereof; and a second member forming an engaging
structure about a lower end thereof, and a connect portion above
the engaging structure of the second member and connected to an
opposite end of the spring portion of the first member, said
connect portion being so configured that its connection with the
opposite end of the spring portion of the first member can be
varied along a length of the connect portion by manipulating the
connect portion.
9. The clip as claimed in claim 8, wherein the connect portion is
configured with a plurality of pairs of teeth formed at its
opposite side edges, a slot being vertically defined in a middle
portion of the connect portion and extending downwardly from a top
edge of the connect portion.
10. The clip as claimed in claim 9, wherein the opposite end of the
spring portion of the first member defines a cutout therein, the
cutout comprising a receiving section and a locking section
communicating with each other, the receiving section being larger
than the locking section, the connect portion of the second member
being receivable in the receiving section and engaged in the
locking section to engage with the opposite end of the spring
portion of the first member.
11. A method for assembling a heat sink assembly, comprising:
Preparing a heat sink with a base and a plurality of fins extending
upwardly from the base; Mounting an electric fan onto the fins;
Extending a spring portion of a first member of a clip through the
fins, said first member having a first leg depending from an end of
the spring portion, said first leg having an engaging structure
near a lower end thereof; and Connecting a second member of the
clip to an opposite end of the spring portion, the second member
being located outside an edge of the base of the heat sink, the
second member having an engaging structure about a lower end
thereof, a length between the engaging structure of the second
member and the connection between the second member and the
opposite end of the spring portion of the first member being
adjustable by varying the connecting point of the second member
with the opposite end of the spring portion of the first
member.
12. A method for assembling a heat sink assembly as claimed in
claim 11, wherein the second member has a plurality of
symmetrically opposite teeth formed on opposite edges thereof and
the opposite end of the spring portion defines a cutout, a length
between the engaging structure of the second member and the
connection between the second member and the opposite end of the
spring portion of the first member being adjustable according to a
pair of particular teeth selected to engage in the cutout.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to clips securing heat sinks
onto heat-generating electronic devices, and particularly to clips
which readily and securely attach a heat sink to an electronic
device.
[0003] 2. Prior Art
[0004] Computer electronic devices such as central processing units
(CPUs) frequently generate large amounts of heat, which can
destabilize operation and cause damage. A heat sink placed in
thermal contact with an electronic device mounted on a socket
transfers heat from the electronic device through conduction.
Oftentimes, the heat sink is secured to the electronic device with
a clip.
[0005] FIG. 4 shows a conventional clip 1. The clip 1 comprises a
central press portion 2, a pair of spring portions 3 respectively
extending in opposite directions from the press portion 2, and a
pair of legs 4 respectively depending from the spring portions 3.
Each leg 4 defines an opening 5 for engaging with a catch formed on
a socket, to thereby secure a heat sink to an electronic
device.
[0006] This kind of clip 1 is integrally formed by stamping and
bending. The lengths of the legs 4 of the clip 1 are not
adjustable. Thus the fixing force of the clip 1 cannot be adjusted
to fit heat sinks of varying size and weight. In other words, the
clip 1 is not very versatile. Furthermore, during assembly, the
clip 1 must be attached to a heat sink prior to installation of a
fan. This can be unduly inconvenient, particularly for mass
production on an assembly line. Moreover, the legs 4 of the clip 1
are prone to plastic deformation, particularly after prolonged use
of the clip 1. The clip 1 is then not able to securely attach a
heat sink to an electronic device.
SUMMARY OF THE INVENTION
[0007] Accordingly, an object of the present invention is to
provide a clip which readily and securely attaches a heat sink to
an electronic device.
[0008] Another object of the present invention is to provide a clip
which has adjustable fixing force according to the particular heat
sink being used.
[0009] To achieve the above-mentioned objects, a clip in accordance
with the present invention comprises a first member and a second
member attached to the first member. The first member comprises a
spring portion, a first leg extending from one end of the spring
portion and adapted to engage with a socket, and a handle extending
from an opposite end of the spring portion. A pair of flanges
extends from opposite side edges of the spring portion. Both
flanges are folded back one over the other and over the spring
portion, for reinforcing the clip. The handle defines a cutout
comprising a receiving section and a locking section. The second
member comprises a connect portion forming a plurality of teeth on
opposite edges thereof, and a second leg. The connect portion is
first received in the receiving section and then engages in the
locking section. A slot is defined through the connect portion for
facilitating elastic deformation of the connect portion. The
effective length of the second member is adjustable according to
the particular teeth selected to engage in the locking section.
[0010] Other objects, advantages and novel features of the present
invention will be drawn from the following detailed embodiment of
the present invention with attached drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is an exploded view showing a clip of the present
invention for attaching a heat sink to a central processing unit
mounted on a socket, the heat sink having a fan attached
thereon;
[0012] FIG. 2 is an exploded view of the clip of FIG. 1;
[0013] FIG. 3 is an assembled view of FIG. 1; and
[0014] FIG. 4 is a perspective view of a conventional clip.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0015] Referring to the attached drawings, FIG. 1 is an exploded
view showing a clip 10 of the present invention for attaching a
heat sink 22 to a central processing unit (CPU) 30 mounted on a
socket 40. The heat sink 22 has a fan 24 attached thereon.
[0016] The heat sink 22 comprises a base 222 having a bottom face
(not labeled), and a top face (not labeled) opposite to the bottom
face. A plurality of fins 224 extends upwardly from the top face of
the base 222. A channel 226 is defined between two adjacent central
fins 224. The fan 24 is attached on the fins 224 of the heat sink
22. A pair of catches 44 (one not visible) is formed on opposite
sides of the socket 40 respectively.
[0017] Referring also to FIG. 2, the clip 10 in accordance with the
present invention comprises a first member 12 and an second member
14 attached to the first member 12. The first member 12 comprises a
central spring portion 122, a first leg 126 extending downwardly
from one end of the spring portion 122, and a handle 128 extending
from an opposite end of the spring portion 122. A pair of flanges
130 extends from opposite side edges of the spring portion 122.
Both flanges 130 are folded back one over the other and over a top
surface of the spring portion 122, for reinforcing the clip 10. A
first aperture 132 is defined in the first leg 126. A cutout 134 is
defined in the handle 128. The cutout 134 comprises a receiving
section 136 and a locking section 138. The locking section 138 is
smaller than the receiving section 136, is disposed inwardly from
the receiving section 136, and is in communication with the
receiving section 136. A protrusion 139 is formed on one edge of
the handle 128 at the cutout 134. The protrusion 139 is opposite to
the locking section 138, and extends into the cutout 134 toward the
locking section 138.
[0018] The second member 14 comprises a second leg 142, and a
connect portion 144 extending upwardly from the second leg 142. A
second aperture 150 is defined in the second leg 142. The connect
portion 144 forms a plurality of symmetrically opposite teeth 148
on opposite edges thereof, for entering into the receiving section
136 and engaging in the locking section 138 of the cutout 134 of
the first member 12. A distance between outmost ends of topmost
teeth 148 is greater than a corresponding width of the receiving
section 136, for preventing the second member 14 from slipping out
of the cutout 134. A slender V-shaped slot 146 is defined through a
middle of the connect portion 144 from a top edge thereof, for
facilitating elastic deformation of the connect portion 144.
[0019] Referring also to FIG. 3, in assembly, the first member 12
of the clip 10 is passed through the channel 226 of the heat sink
22. The connect portion 144 of the second member 14 is inserted
into the receiving section 136 of the first member 12 from under
the handle 128. The connect portion 144 elastically deforms to
allow the topmost teeth 148 to engage with the handle 128 in the
receiving section 136 of the first member 12. The protrusion 139 is
received in the slot 146, thereby pre-positioning the connect
portion 144 in the cutout 134. The combined heat sink 22, fan 24
and clip 10 is then placed onto the CPU 30. The catches 44 of the
socket 40 are loosely received in the first and second apertures
132, 150 of the first and second legs 126, 142 respectively. A pair
of directly opposite teeth 148 is selected according to the
particular dimensions of the heat sink 22. The handle 128 is
depressed and the connect portion 144 is simultaneously pushed
toward the locking section 138 of the first member 12, such that
the pair of selected teeth 148 engage at the locking section 138.
The catches 44 of the socket 40 are thereby firmly engaged by the
first and second legs 126, 142 at the first and second apertures
132, 150. The heat sink 22 with the fan 24 attached thereon is thus
firmly fixed on the CPU 30.
[0020] In the present invention, an effective operating length of
the second member 14 between the second leg 142 and the engagement
of the connect portion 144 in the locking section 138 is
adjustable. Adjustment varies according to which pair of directly
opposite teeth 148 engages in the locking section 138. Thus the
fixing force of the clip 10 is adjustable according to the
particular heat sink 22 being used. Accordingly, the clip 10 can
securely attach a variety of heat sinks 22 onto the CPU 30.
Furthermore, the flanges 130 of the first member 12 reinforce the
clip 10. Thus the clip 10 is able to sustain a large fixing
force.
[0021] It is understood that the invention may be embodied in other
forms without departing from the spirit thereof. Thus, the present
example and embodiment is to be considered in all respects as
illustrative and not restrictive, and the invention is not to be
limited to the details given herein.
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