U.S. patent application number 13/220687 was filed with the patent office on 2012-12-27 for heat sink.
This patent application is currently assigned to FOXCONN TECHNOLOGY CO., LTD.. Invention is credited to YU-CHAO CAI, WEI-HSIANG CHANG.
Application Number | 20120325452 13/220687 |
Document ID | / |
Family ID | 47360725 |
Filed Date | 2012-12-27 |
United States Patent
Application |
20120325452 |
Kind Code |
A1 |
CHANG; WEI-HSIANG ; et
al. |
December 27, 2012 |
HEAT SINK
Abstract
A heat sink includes a plurality of fins arranged parallel to
each other. The fins include a first fin, a second fin, a third
fin, a fourth fin, and a plurality of middle fins sandwiched
between the third fin and the fourth fin. The first fin is at an
outmost side of the heat sink. The first fin has a protrusion. The
second fin is located at an opposite outmost side of the heat sink.
The third fin is adjacent to the first fin. The protrusion of the
first fin abuts against the third fin. The fourth fin is adjacent
to the second fin and has a protrusion to abut against the second
fin. The middle fins being flat with no protrusions.
Inventors: |
CHANG; WEI-HSIANG; (New
Taipei, TW) ; CAI; YU-CHAO; (KunShan City,
CN) |
Assignee: |
FOXCONN TECHNOLOGY CO.,
LTD.
Tu-Cheng
TW
FURUI PRECISE COMPONENT (KUNSHAN) CO., LTD.
KunShan City
CN
|
Family ID: |
47360725 |
Appl. No.: |
13/220687 |
Filed: |
August 30, 2011 |
Current U.S.
Class: |
165/185 |
Current CPC
Class: |
H01L 2924/0002 20130101;
H01L 2924/00 20130101; H01L 2924/0002 20130101; H01L 23/3672
20130101 |
Class at
Publication: |
165/185 |
International
Class: |
F28F 7/00 20060101
F28F007/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 27, 2011 |
CN |
201110174309.9 |
Claims
1. A heat sink comprising a plurality of fins arranged parallel to
each other, the fins comprising: a first fin at an outmost side of
the heat sink, the first fin comprising a protrusion; a second fin
at an opposite outmost side of the heat sink; a third fin adjacent
to the first fin, the protrusion abutting against the third fin; a
fourth fin adjacent to the second fin, the fourth fin comprising
another protrusion abutting against the second fin; and a plurality
of middle fins sandwiched between the third fin and the fourth fin,
the middle fins being flat with no protrusions.
2. The heat sink of claim 1, wherein each of the fins has two
flanges extending from opposite sides thereof.
3. The heat sink of claim 2, wherein the protrusions of the first
fin and the fourth fin are formed between the flanges.
4. The heat sink of claim 3, wherein the protrusions of the first
fin and the fourth fin are punched from middle portions of the
first fin and the fourth fin.
5. The heat sink of claim 1, wherein each of the protrusions has a
trapezoid-shaped cross section.
6. The heat sink of claim 5, wherein the protrusion of the first
fin has a narrow portion abutting against the third fin and two
inclined portions interconnecting the first fin and the narrow
portion.
7. The heat sink of claim 5, wherein the protrusion of the fourth
fin has a narrow portion abutting against the second fin and two
inclined portions interconnecting the fourth fin and the narrow
portion.
8. A heat sink comprising a plurality of fins arranged parallel to
each other, each of the fins comprising a body and two flanges
extending from opposite sides of the body, the fins comprising: an
outermost fin; an adjacent fin adjacent to the outermost fin; a
plurality of middle fins sandwiched between the adjacent fins, the
body of each middle fin being flat with no protrusion; and at least
a protrusion extending from the body of one of the outermost fin
and the adjacent fin to contact the other one of the outermost fin
and the adjacent fin.
9. The heat sink of claim 8, wherein the protrusion and the flanges
of the same fin are located at opposite sides of the body of the
corresponding fin.
10. The heat sink of claim 8, wherein the protrusion is formed
between the flanges.
11. The heat sink of claim 8, wherein the protrusion is punched
from a middle portion of the outermost fin to the adjacent fin.
12. The heat sink of claim 11, wherein the protrusion has a narrow
portion abutting against the adjacent fin and two inclined portions
interconnecting the outermost fin and the narrow portion.
13. The heat sink of claim 8, wherein the protrusion is punched
from a middle portion of the adjacent fin to the outermost fin.
14. The heat sink of claim 13, wherein the protrusion has a narrow
portion abutting against the outermost fin and two inclined
portions interconnecting the adjacent fin and the narrow
portion.
15. The heat sink of claim 8, wherein the protrusion has a
trapezoid-shaped cross section.
Description
BACKGROUND
[0001] 1. Technical Field
[0002] The disclosure relates to heat sinks in electronics, and
more particularly to a heat sink with a plurality of fins.
[0003] 2. Description of Related Art
[0004] During operation of an electronic device such as a computer
central processing unit (CPU), a large amount of heat is often
produced. The heat must be quickly removed from the CPU to prevent
it from becoming unstable or being damaged. Typically, a heat sink
is attached to an outer surface of the CPU to absorb the heat from
the CPU.
[0005] Conventionally, a heat sink includes a plurality of fins to
dissipate the heat from the CPU to an ambient atmosphere. The fins
are spaced from each other to define channels therebetween. In
order to improve a thermal capability of the heat sink, the fins
are manufactured thinner for easily dissipating the heat. However,
the heat sink will be struck in operation and outmost fins of the
heat sink will be easily damaged.
[0006] What is needed, therefore, is a heat sink which can overcome
the limitations described.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Many aspects of the present embodiments can be better
understood with reference to the following drawings. The components
in the drawings are not necessarily drawn to scale, the emphasis
instead being placed upon clearly illustrating the principles of
the present embodiments. Moreover, in the drawings, like reference
numerals designate corresponding parts throughout the several
views.
[0008] FIG. 1 is an assembled, isometric view of a heat sink in
accordance with an embodiment of the disclosure.
[0009] FIG. 2 is a partly assembled view of the heat sink of FIG.
1.
[0010] FIG. 3 is a view similar FIG. 1, but showing the heat sink
in another view.
DETAILED DESCRIPTION
[0011] Referring to FIG. 1, a heat sink 100 in accordance with an
exemplary embodiment of the disclosure is shown. The heat sink 100
includes a number of fins 10 arranged together. Every two adjacent
fins 10 define a channel 20 therebetween.
[0012] Each of the fins 10 includes a body 11 and two flanges 13.
The flanges 13 extend from top and bottom sides of the body 11
respectively and perpendicularly to the body 11 along a same
direction, respectively. Each of the flanges 13 abuts against the
body 11 of the adjacent fin 10. The body 11 includes a first part
110 and a second part 113 extending from a left end of the first
part 110. The first part 110 is substantially rectangular. The
second part 113 is irregular. A bottom of the first part 110 and a
bottom of the second part 113 are coplanar. A height of the second
part 113 is larger than that of the first part 110.
[0013] Referring to FIGS. 2-3, the outmost fins 10 of the heat sink
100 include a first fin 10a and a second fin 10b at opposite ends
of the heat sink 100, respectively. The heat sink 100 includes a
third fin 10c adjacent to the first fin 10a and a fourth fin 10d
adjacent to the second fin 10b. The first fin 10a includes a
protrusion 15 extending therefrom to the third fin 10c and abutting
against the third fin 10c. The fourth fin 10d includes a protrusion
16 extending therefrom to the second fin 10b and abutting against
the second fin 10b. Each of the protrusions 15, 16 is punched
respectively from a middle of an outer edge of the second part 113
of the first fin 10a and the fourth fin 10d. Each of the
protrusions 15, 16 has a trapezoid-shaped cross section. The
protrusion 15 and the flanges 13 of the first fin 10a are located
at opposite sides of the body 11 of the first fin 10a. The
protrusion 16 and the flanges 13 of the fourth fin 10d are located
at opposite sides of the body 11 of the fourth fin 10d. The
protrusion 15 includes a narrow portion 151 and two inclined
portions 152 interconnecting the first fin 10a and the narrow
portion 151. The narrow portion 151 abuts against the third fin
10c. The protrusion 16 includes a narrow portion 161 and two
inclined portions 162 interconnecting the fourth fin 10d and the
narrow portion 161. The narrow portion 161 abuts against the second
fin 10b. The bodies 11 of middle fins 10 between the third fin 10c
and the fourth fin 10d are flat with no protrusion.
[0014] Since the first fin 10a abut against the third fin 10c by
the protrusion 15, the second fin 10b abut against the fourth fin
10d by the protrusion 16, middle portions of the outmost fins 10a,
10b of the heat sink 100 are supported and protected to avoid a
damage from an outer object. Therefore, a robust structure of the
heat sink 100 is provided.
[0015] Alternatively, in another embodiment, the protrusion 15 can
extend from the third fin 10c to the first fin 10a, or the
protrusion 16 can extend from the second fin 10b to the fourth fin
10d. An amount of the protrusions 15, 16 can be two or more. The
protrusions 15, 16 can be designed at a weak portion of the fins 10
for need to intensify the heat sink 10.
[0016] It is to be understood, however, that even though numerous
characteristics and advantages of certain embodiments have been set
forth in the foregoing description, together with details of the
structures and functions of the embodiments, the disclosure is
illustrative only, and changes may be made in detail, especially in
matters of shape, size, and arrangement of parts within the
principles of the disclosure to the full extent indicated by the
broad general meaning of the terms in which the appended claims are
expressed.
* * * * *