CN106922102B

CN106922102B - Heat dissipation unit combined element

Info

Publication number: CN106922102B
Application number: CN201510988352.7A
Authority: CN
Inventors: 林胜煌; 林源亿
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2023-02-24
Anticipated expiration: 2035-12-24
Also published as: CN106922102A

Abstract

A heat dissipation unit assembly element, correspondingly combining a screw locking element with a heat dissipation unit in a correspondingly pivotable manner, the heat dissipation unit assembly element comprising: the clamping device comprises a body, a blocking part, a first inner clamping part, a second inner clamping part and a first outer clamping part; the body is provided with a first part and a second part, a through hole is arranged along the axial direction of the body, and the blocking part is arranged on the outer edge of any one of the first part and the second part in a ring-shaped manner; the first inner clamping part is provided with a plurality of clamping sheets and is arranged corresponding to the blocking part; the second inner clamping part is provided with a plurality of stoppers which are selectively arranged on any one of the first part and the second part; the first outer clamping part is arranged at the outer edge of the other end opposite to the position where the blocking part is arranged; the present invention increases the convenience and stability of the screw locking device temporarily fixed on the heat dissipation unit, and prevents the screw locking device from being disassembled and dropped during transportation.

Description

Heat radiation unit combined element

[ technical field ] A method for producing a semiconductor device

A heat dissipation unit assembly, and more particularly to a heat dissipation unit assembly that facilitates temporary fixing of a screw locking device for fixing a heat dissipation unit to prevent the heat dissipation unit from falling off during transportation.

[ background of the invention ]

The electronic components inside the existing electronic equipment can generate heat sources when in operation, so that the heat dissipation efficiency needs to be increased by the aid of a heat dissipation unit to avoid damage of the electronic components caused by overhigh temperature, a heat dissipation fin set or a heat sink is matched with at least one heat dissipation fan set, and the heat dissipation unit is forcibly dissipated by the heat dissipation fan to improve the overall heat dissipation efficiency; furthermore, the commonly used heat dissipation fin set or heat sink is required to be firmly disposed on the electronic device generating a heat source through the support structure, so as to effectively achieve the effects of heat conduction and heat dissipation.

Various heat dissipating units are usually assembled by different fastening or screwing, for example, a heat dissipating fan and a heat sink are usually assembled by fixing the heat sink through a heat sink frame or a fan frame, and then screwing two heat dissipating units and holes or internal threads formed on the frame through screw or other screwing elements to fasten the two heat dissipating units together, or one of the heat dissipating units and a heat source are directly assembled by corresponding fastening.

The screw locking elements cannot be directly fixed with the heat dissipation units at the same time, and the screw locking elements are correspondingly inserted into the heat dissipation units for screw locking when the screw locking elements are required to be assembled, so that the screw locking elements cannot be fixed when the screw locking elements are firstly inserted into the pre-arranged orifices of the heat dissipation units, and the screw locking elements are easy to separate from the heat dissipation units when the heat dissipation units are transported, and the falling screw locking elements can cause short-circuit faults and damages to the electronic equipment substrate when the screw locking elements are arranged on the electronic equipment substrate.

In addition, those skilled in the art also provide a clip structure for temporarily clipping the screw locking element by the clip structure to prevent the screw locking element from separating from the heat dissipation unit, and the clip structure needs to be additionally designed for different types of heat dissipation units, so the sharing is not good, even if the problem of the screw locking element falling off during the transportation of the heat dissipation unit is solved, the sharing is not good, which becomes another derivative problem. As mentioned above, the known support structure has the following disadvantages:

1. the common usability cannot be achieved;

2. the falling off is easy to carry;

3. consuming the cost of mold development.

[ summary of the invention ]

To solve the above-mentioned drawbacks of the prior art, the present invention provides a heat dissipating unit assembly capable of preventing a screw locking device from falling off during the transportation of a heat dissipating unit.

To achieve the above object, the present invention provides a heat dissipating unit assembly, which correspondingly pivotally combines a screw locking element with a heat dissipating unit, the heat dissipating unit assembly comprising: a body having a first portion and a second portion, wherein the first portion and the second portion are connected to each other, and the first portion and the second portion are respectively disposed at two ends of the body, the body is axially provided with a through hole, and the through hole penetrates through the first portion and the second portion of the body; a blocking part, which is arranged on the outer edge of any one of the first part and the second part in a selective ring manner; a first inner clip part having a plurality of clip pieces formed by radially extending the inner wall of the body having the through hole toward the through hole, the first inner clip part corresponding to the blocking part; a first external clamping part correspondingly arranged on the outer edge of the other end opposite to the position where the blocking part is arranged and formed by the outward protrusion of the outer edge of the body.

The clamping sheets are provided with a first end face and a second end face which are respectively arranged on the upper side and the lower side of the clamping sheet, and any one of the first end face and the second end face is inclined.

The second inner clamping part is selectively arranged on any one of the first part and the second part, the second inner clamping part is provided with a plurality of stop blocks, the stop blocks are formed by radially extending the inner wall of the through hole of the body to the through hole, the stop blocks are provided with a first top surface and a second top surface which are respectively arranged at two ends of the stop blocks, and any one of the first top surface and the second top surface is in an inclined shape.

The stoppers are arranged along the axial direction of the inner wall surface of the shaft hole of the body in either a continuous or discontinuous manner.

The body is provided with at least a first axial slot and a second axial slot at the opposite end of the blocking part and is correspondingly arranged, the first and second axial slots are formed by extending along the outer edge of the body in the axial direction and are communicated with the through hole of the body, and the first and second axial slots define a first hook body and a second hook body on the outer edge of the body.

The body is provided with at least a first axial slot, a second axial slot and a third axial slot at the opposite end of the blocking part, and the first axial slot, the second axial slot and the third axial slot are arranged at a distance of 120 degrees (or at any other angle), the first axial slot, the second axial slot and the third axial slot are formed by extending axially along the outer edge of the body and communicated with the through hole of the body, and the first axial slot, the second axial slot and the third axial slot define a first hook body, a second hook body and a third hook body on the outer edge of the body.

The body further comprises a third part and a second external clamping part, the third part is connected with the first part, the second external clamping part is arranged at the outer edge of the tail end of the third part and formed by the outward protrusion of the outer edge of the tail end of the third part, and the external clamping part is provided with at least one oblique conical surface arranged on the top surface of the second external clamping part.

The stoppers can also be arranged between the first part and the third part, and the stoppers are arranged along the axial direction of the inner wall surface of the shaft hole of the body in any one of a continuous or discontinuous manner.

The body has at least a fifth axial slot and a sixth axial slot at the opposite end of the body to the blocking portion, the fifth and sixth axial slots are formed by extending axially along the outer edge of the body and are communicated with the through hole of the body, and the fifth and sixth axial slots define a fifth hook body and a sixth hook body on the outer edge of the body.

The opposite end of the body where the blocking portion is disposed has at least a fifth axial slot, a sixth axial slot and a seventh axial slot, which are disposed at a distance of 120 degrees from each other, the fifth, sixth and seventh axial slots extend axially along the outer edge of the body and are connected to the through hole of the body, and the fifth, sixth and seventh axial slots define a fifth hook body, a sixth hook body and a seventh hook body on the outer edge of the body.

The heat dissipation unit assembly of the present invention can ensure that the screw locking device for screw locking and fixing the heat dissipation unit will not fall off during the transportation of the heat dissipation unit, and the sharing elasticity between the heat dissipation unit assembly and each heat dissipation unit is large, so as to save the manufacturing cost of repeatedly developing the mold.

[ description of the drawings ]

FIG. 1 is a perspective view of a heat dissipation unit assembly according to a first embodiment of the present invention;

FIG. 2 is a sectional view of a first embodiment of the heat dissipating unit assembly of the present invention;

FIG. 3 is a sectional view of the assembly of the heat dissipating unit of the present invention;

FIG. 4 is a perspective view of a second embodiment of the heat dissipation unit assembly of the present invention;

FIG. 5 is a perspective view of a heat sink assembly according to a third embodiment of the present invention;

FIG. 6 is a perspective view of a fourth embodiment of the heat dissipation unit assembly of the present invention;

FIG. 7 is a sectional view of a fifth embodiment of the heat dissipating unit assembly of the present invention;

FIG. 8 is a perspective view of a sixth embodiment of the heat dissipating unit assembly of the present invention;

FIG. 9 is a perspective view of a seventh embodiment of the heat dissipating unit assembly of the present invention;

FIG. 10 is a perspective view of an eighth embodiment of the heat dissipation unit assembly of the present invention;

FIG. 11 is a perspective view of a ninth embodiment of the heat dissipation unit assembly of the present invention;

FIG. 12 is an operation diagram of the present invention;

FIG. 13 is an operation diagram of the present invention;

FIG. 14 is an operation diagram of the present invention;

FIG. 15 is an operation diagram of the present invention.

The components represented by the respective numbers in the drawings are:

heat radiation unit combined element 1

Body 11

First portion 11a

Second part 11b

First axial slot 11c

Second axial slot 11d

The first hook buckle 11e

Second hook body 11f

Third axial slot 11g

Third hook buckle body 11h

Third portion 11i

Fifth axial slot 11j

Sixth axial slit 11k

Fifth hook buckle 11l

Sixth hook body 11m

Seventh axial slot 11n

Seventh hook buckle 11o

Stop part 12

First inner clip part 13

Card sheet 131

First end surface 1311

Second end 1312

Second inner clip part 14

Stopper 141

First outer clip part 15

First surface 151

Second face 152

Through hole 16

Second external card portion 17

Oblique cone surface 17a

Heat radiation unit 2

First side surface 21

Second side surface 22

Through hole 23

Screw locking element 3

Head 31

Body part 32

Step groove 321

Inner bore 322

Internal thread 323

Electronic circuit board 4

Fixing frame 41

Stud 411

External thread 412

A heat source 42.

[ detailed description ] embodiments

The above objects of the present invention, together with the structural and functional features thereof, will be best understood from the following description taken in conjunction with the accompanying drawings.

Referring to fig. 1, fig. 2 and fig. 3, which are a perspective view and a cross-sectional view of a heat dissipating unit assembly according to a first embodiment of the present invention, as shown in the drawings, the heat dissipating unit assembly 1 includes: a main body 11, a blocking portion 12, a first inner locking portion 13, a second inner locking portion 14, and a first outer locking portion 15;

the body 11 has a first portion 11a and a second portion 11b, the first and

second portions

11a, 11b are connected to each other, the first and

second portions

11a, 11b are respectively disposed at two ends of the body, the body 11 is axially provided with a through hole 16, and the through hole 16 penetrates through the first and

second portions

11a, 11b of the body 11.

The blocking portion 12 can be selectively and annularly disposed on the outer edge of any one of the first and

second portions

11a and 11b, and the embodiment takes the outer edge of the end of the first portion 11a disposed on the body 11 as an illustrative embodiment, but not limited thereto; the blocking portions 12 can be arranged in a continuous or discontinuous manner, but the embodiment of the invention is a discontinuous arrangement of rings as an illustrative embodiment, but not limited thereto.

The first inner locking portion 13 has a plurality of locking pieces 131, the locking pieces 131 are formed by radially extending from the inner wall of the main body 11 where the through hole 16 is formed to the center of the through hole 16, and the first inner locking portion 13 is disposed corresponding to the blocking portion 12; the card sheet 131 has a first end surface 1311 and a second end surface 1312 respectively disposed on the upper and lower sides of the card sheet 131, and any one of the first and

second end surfaces

1311, 1312 is inclined.

The second inner locking portion 14 is selectively disposed on any one of the first and

second portions

11a, 11b, and has a plurality of stoppers 141, the stoppers 141 are formed by radially extending and protruding from the inner wall of the body 11 where the through hole 16 is disposed toward the center of the through hole, in this embodiment, the extending pattern of the stoppers 141 is axially extended from the inner wall of the body 11 where the through hole 16 is disposed (i.e., the first portion 11a extends to the inner side of the second portion 11 b) from the first portion 11a of the body 11 toward the second portion 11b, the stoppers 141 have a first top surface 1411 and a second top surface 1412 disposed at two ends of the stoppers 141, and any one of the first and second

top surfaces

1411, 1412 is inclined, another embodiment of the second inner locking portion 14 is shown in fig. 3, and the second inner locking portion 14 is disposed at the end of the second portion 11b in a discontinuous ring.

The first external locking portion 15 is correspondingly disposed at the outer edge of the other end opposite to the location where the blocking portion 12 is disposed, and is formed by the outer edge of the body 11 protruding outward, the blocking portion 12 of the present embodiment is disposed at the outer edge of the end of the first portion 11a as an illustrative embodiment, the first external locking portion 15 is correspondingly disposed at the outer edge of the end of the second portion 11b as an illustrative embodiment, the first external locking portion 15 has a first surface 151 and a second surface 152, the second surface 152 is either an arc surface or an inclined surface, the present embodiment takes the arc surface as an illustration but not limited thereto.

Please refer to fig. 4, which is a perspective view of a second embodiment of the heat dissipating unit assembly of the present invention, as shown in the drawing, the present embodiment has the same technical features as the first embodiment, and therefore will not be described herein, but the difference between the present embodiment and the first embodiment is that the opposite end (i.e. the second portion 11 b) of the body 11 where the blocking portion 12 (i.e. the first portion 11 a) is disposed has at least one first axial slot 11c and one second axial slot 11d, and the first and second

axial slots

11c and 11d are formed by extending axially along the outer edge of the body 11 and are communicated with the through hole 16 of the body 11, and the first and second

axial slots

11c and 11d define a first hook 11e and a second hook 11f on the outer edge of the body 11.

Please refer to fig. 5, which is a perspective view of a third embodiment of the heat dissipating unit assembly of the present invention, as shown in the drawing, the present embodiment has the same technical features as the first embodiment, and therefore will not be described herein, but the difference between the present embodiment and the first embodiment is that the opposite end (i.e. the second portion 11 b) of the body 11 where the blocking portion 12 (i.e. the first portion 11 a) is disposed has at least a first axial slot 11c, a second axial slot 11d and a third axial slot 11g, which are disposed at an angle different from each other by 120 degrees or other angles, the first, second and third

axial slots

11c, 11d and 11g are formed by extending axially along the outer edge of the body 11 and are communicated with the through hole 16 of the body 11, and the first, second and third

axial slots

11c, 11d and 11g define a first hook 11e, a second hook 11f and a third hook 11h along the outer edge of the body 11.

Please refer to fig. 6, which is a perspective view of a fourth embodiment of the heat dissipating unit assembly of the present invention, and as shown in the drawing, the present embodiment has the same technical features as the second embodiment, and therefore will not be described herein again, but the present embodiment is different from the second embodiment in that the opposite end (i.e. the second portion 11 b) of the body 11 where the blocking portion 12 (i.e. the first portion 11 a) is disposed has at least one first axial slot 11c and one second axial slot 11d and is disposed correspondingly, the first and second

axial slots

11c and 11d are formed by extending axially along the outer edge of the body 11 and are communicated with the through hole 16 of the body 11, but the first and second

axial slots

11c and 11d do not completely penetrate the second portion 11b of the body 11 axially, i.e. the first outer locking portion 15 of the second portion 11b is still disposed at the end of the second portion 11b completely.

The number of the axial slots provided in the second, third and fourth embodiments is not limited to four or more.

Please refer to fig. 7, which is a perspective view of a fifth embodiment of a heat dissipating unit assembly of the present invention, and as shown in the drawing, the present embodiment has the same technical features as the first embodiment, and therefore will not be described herein again, but the present embodiment is different from the first embodiment in that the cross section of any one of the first and

second portions

11a, 11b of the main body is non-circular, and the present embodiment takes the non-circular cross section of the second portion 11b as an illustration but not a limitation, such as one of an oval shape, a square shape, a ladder shape, and a polygonal shape, and the cross section is made to correspond to a desired assembly position to avoid relative radial rotation.

Please refer to fig. 8, which is a perspective view of a sixth embodiment of the heat dissipating unit assembly of the present invention, as shown in the drawing, the present embodiment has the same technical features as the first embodiment, and therefore will not be described herein, but the present embodiment is different from the first embodiment in that the main body 11 further has a third portion 11i and a second external locking portion 17, the third portion 11i is connected to the first portion 11a, the second external locking portion 17 is disposed on the outer edge of the end of the third portion 11i and is formed by the outer edge of the end of the third portion 11i protruding outward, and the second external locking portion 17 has at least one inclined cone 17a disposed on the top surface of the second external locking portion 17.

Please refer to fig. 9, which is a cross-sectional view of a seventh embodiment of the heat dissipating unit assembly of the present invention, as shown in the figure, the present embodiment has the same technical features as the fourth embodiment, and therefore will not be described herein, but the present embodiment is different from the fourth embodiment in that the stoppers 141 may be disposed between the first and

third portions

11a and 11i at the same time, and the stoppers 141 are disposed along the inner wall of the axial hole 16 of the body 11 in either a continuous or discontinuous manner.

Please refer to fig. 10, which is a perspective view and a cross-sectional view of an eighth embodiment of the heat dissipating unit assembly of the present invention, as shown in the drawings, the present embodiment has the same technical features as the above-mentioned sixth embodiment, and therefore will not be described herein, but the difference between the present embodiment and the above-mentioned sixth embodiment is that the opposite end (i.e. the third portion 11 i) of the body 11 where the blocking portion 12 (i.e. the first portion 11 a) is disposed also has at least one fifth axial slot 11j and one sixth axial slot 11k and is correspondingly disposed, the fifth and sixth axial slots 11j, 11k are formed by extending axially along the outer edge of the body 11 and are communicated with the through hole 16 of the body 11, and the fifth and sixth axial slots 11j, 11k define a fifth hook 11l and a sixth hook 11m on the outer edge of the body 11.

Please refer to fig. 11, which is a perspective view of a ninth embodiment of the heat dissipating unit assembly of the present invention, and as shown in the drawing, the present embodiment has the same technical features as the sixth embodiment, and therefore will not be described herein again, but the difference between the present embodiment and the sixth embodiment is that the opposite end (i.e. the third portion 11 i) of the body 11 where the blocking portion 12 (i.e. the first portion 11 a) is provided has at least a fifth axial slot 11j, a sixth axial slot 11k and a seventh axial slot 11n, which are arranged at an interval of 120 degrees, the fifth, sixth and seventh

axial slots

11j, 11k and 11n are formed by extending axially along the outer edge of the body 11 and are communicated with the through hole 16 of the body 11, and the fifth, sixth and seventh

axial slots

11j, 11k and 11n define a fifth hook 11l, a sixth hook 11m and a seventh hook 11o along the outer edge of the body 11.

The number of the axial slots formed in the sixth, seventh, eighth and ninth embodiments is not limited to four or more.

Referring to fig. 12 and 13, which are schematic operation diagrams of the present invention and additionally referring to fig. 1 to 11, the present embodiment includes a heat dissipation unit 2, a fixing element 1 of the heat dissipation unit, a screw locking element 3, an electronic circuit substrate 4, and a fixing frame 41 disposed on the electronic circuit substrate 4;

the heat dissipation unit 2 has a first side surface 21, a second side surface 22 and a plurality of through holes 23, and the through holes 23 are disposed in left and right or up and down correspondence and penetrate the first and second side surfaces 21, 22 of the heat dissipation unit 2.

The fixing frame 41 is also provided with at least one stud 411 corresponding to the through holes 23, and the outer edge of the stud 411 is provided with a plurality of external threads 412.

The screw locking element 3 has a head 31 and a body 32, the head 31 and the body 32 are connected with each other, the outer diameter of the head 31 is larger than the outer diameter of the body 32, the body 32 further has a stepped groove 321 surrounding the outer edge of the body 32, the end of the body 32 has an inner hole 322, and the inner hole 322 has a plurality of inner threads 323.

The fixing frame 41 is correspondingly disposed near the electronic circuit board 4 where a heat source 42 is disposed.

When assembling, firstly, the fixing elements 1 of the heat dissipating unit are correspondingly inserted into the through holes 23, the blocking portion 12 of the body 11 is correspondingly attached to the first side surface 21 of the heat dissipating unit 2, the first external locking portion 15 at the other end of the body 11 is correspondingly hooked on the second side surface 22 of the heat dissipating unit 2, then the body portion 32 of the screw locking element 3 is correspondingly inserted into the through hole 16 of the body 11 of the heat dissipating unit assembly 1, and the head portion 31 of the screw locking element 3 is correspondingly abutted against the side of the blocking portion 12 of the body 11 opposite to the side where the first side surface 21 of the heat dissipating unit 2 is attached to each other, the blocking portion 12 has the function of mutually attaching and assembling the body 11 and the first side surface 21 of the heat dissipating unit 2, and can be used as a gasket for screw locking the screw locking element 3 to prevent the screw locking element 3 from being loosened after assembling.

The locking pieces 131 of the first inner locking portion 13 of the body 11 contact the step groove 321 of the body 32 of the screw locking device 3 and have an axial limiting effect, the second inner locking portion 14 of the body 11 abuts against the outer edge of the portion of the body 32 of the screw locking device 3 where the step groove 321 is disposed to prevent the second portion 11b of the body 11 from retracting inward and separating from the through hole 16 of the heat dissipating unit assembly body 1, and finally the plurality of internal threads 323 of the inner hole 322 disposed at the end of the screw locking device 3 are screwed with the external threads 412 of the outer edge of the stud 411, so that the heat dissipating unit 2 is not removed before the screw locking device 3 is screwed.

Please refer to fig. 14, which is an operation diagram of the present invention and refer to fig. 1 to fig. 11, part of the operation embodiment is the same as the previous embodiment and will not be described herein again, but the present embodiment is different from the previous embodiment in the structural configuration of the fourth embodiment of the heat dissipating unit assembly selected in the present embodiment, and the heat dissipating unit assembly 1 of the present embodiment is a heat dissipating unit assembly that can be assembled with the screw locking element 3 at both ends, that is, both ends of the heat dissipating unit assembly 1 can be inserted with the through holes 23 formed in the heat dissipating unit 2, which does not limit the directionality any more, and both ends can be used.

When the through hole 23 formed in the heat dissipating unit 2 is non-circular, the cross-sectional shape of the heat dissipating unit assembly 1 can be configured to be non-circular, so as to prevent the heat dissipating unit assembly 1 and the through hole 23 formed in the heat dissipating unit 2 from rotating radially (as shown in fig. 15).

Claims

1. A heat dissipation unit assembly for correspondingly pivotally combining a screw locking element with a heat dissipation unit, the heat dissipation unit assembly comprising:

a body having a first portion and a second portion, wherein the first portion and the second portion are connected to each other, and the first portion and the second portion are respectively disposed at two ends of the body, the body is axially provided with a through hole, and the through hole penetrates through the first portion and the second portion of the body;

a blocking part which is arranged on the outer edge of any one of the first part and the second part in a selective ring manner;

a first inner clip part having a plurality of clip pieces formed by radially extending the inner wall of the body having the through hole toward the through hole, the first inner clip part corresponding to the blocking part;

a first external clamping part correspondingly arranged on the outer edge of the other end opposite to the position where the blocking part is arranged and formed by the outward protrusion of the outer edge of the body;

a second inner clamping part selectively arranged on any one of the first part and the second part, wherein the second inner clamping part is provided with a plurality of stoppers which are formed by radially extending the inner wall of the through hole of the body to the center of the through hole, the stoppers are provided with a first top surface and a second top surface which are respectively arranged at two ends of the stoppers, and any one of the first top surface and the second top surface is inclined;

the body further comprises a third part and a second external clamping part, the third part is connected with the first part, the second external clamping part is arranged at the outer edge of the tail end of the second part and formed by the outward protrusion of the outer edge of the tail end of the third part, and the external clamping part is provided with at least one oblique conical surface arranged on the top surface of the second external clamping part.

2. The assembly of claim 1, wherein the clip has a first end and a second end disposed on the upper and lower sides of the clip, and either of the first and second ends is inclined.

3. The heat dissipating unit assembly of claim 1, wherein the stopper is axially disposed along an inner wall of the axial hole of the body in either a continuous or discontinuous manner.

4. The heat dissipating unit assembly as claimed in claim 1, wherein the body has at least a first axial slot and a second axial slot at opposite ends thereof, the first and second axial slots extending axially along the outer edge of the body and communicating with the through hole of the body, the first and second axial slots defining a first hook and a second hook on the outer edge of the body.

5. The heat dissipating unit assembly as claimed in claim 1, wherein the body has at least a first axial slot, a second axial slot and a third axial slot at opposite ends thereof, the first axial slot, the second axial slot and the third axial slot being spaced apart from each other by 120 degrees, the first axial slot, the second axial slot and the third axial slot extending axially along the outer periphery of the body and communicating with the through hole of the body, the first axial slot, the second axial slot and the third axial slot defining a first hook body, a second hook body and a third hook body at the outer periphery of the body.

6. The heat dissipating unit assembly as claimed in claim 1, wherein the stoppers are disposed between the first and third portions and are axially continuous or discontinuous along the inner wall of the axial hole of the body.

7. The heat dissipating unit assembly of claim 1, wherein the body has a fifth axial slot and a sixth axial slot at opposite ends thereof, the fifth and sixth axial slots extending axially along the outer periphery of the body and communicating with the through hole of the body, the fifth and sixth axial slots defining a fifth hook and a sixth hook on the outer periphery of the body.

8. The heat dissipating unit assembly as claimed in claim 1, wherein the body has a fifth axial slot, a sixth axial slot and a seventh axial slot at opposite ends thereof, the fifth axial slot, the sixth axial slot and the seventh axial slot being spaced apart from each other by 120 degrees, the fifth axial slot, the sixth axial slot and the seventh axial slot extending axially along the outer periphery of the body and communicating with the through hole of the body, the fifth axial slot, the sixth axial slot and the seventh axial slot defining a fifth hook body, a sixth hook body and a seventh hook body on the outer periphery of the body.