TWI416309B - Heat dissipation device - Google Patents

Abstract

A heat dissipation device includes a fan holder with a plurality of fastening pins formed thereon, a fan arranged on the fan holder and mounted on the fastening pins, and a plurality of fixtures mounted on the fastening pins and extending through the fan to secure the fan on the fastening pins of the fan holder. The fan has a plurality of fixing holes defined therein for the fastening pins extending therethrough. The fixtures each includes a plurality of claws with outer sides thereof abutting against the fan and inner sides thereof clamping on the fastening pins.

Description

Heat sink

The present invention relates to a heat sink, and more particularly to a heat sink having a fan mount.

With the rapid development of information technology, computer central processing units are becoming faster and faster, and the amount of heat generated by them is increasing. If too much heat is accumulated on the central processing unit and cannot be discharged in time, its operational stability will undoubtedly be affected.

To this end, the industry usually installs a heat sink on the top surface of the central processor, and a fan is placed on the top of the heat sink to utilize the fan and the heat sink to assist in discharging heat. However, it is not easy to mount the fan on the heat sink quickly and securely.

There are many methods for fixing the fan, and there are two commonly used methods. The first one uses a long screw that passes through the upper edge of the fan frame to cooperate with the fan holder, thereby directly locking the fan on the heat sink to reach the fan and the radiator. The combination. However, the head of the long screw is pressed against the upper edge of the fan frame, causing the upper edge of the fan frame to be pressed in one direction and deformed due to unbalanced forces, thereby causing undesirable conditions such as fan noise. The other type uses a small screw that passes through the lower edge of the fan frame to fit the fan holder to fix the fan to the heat sink. Although the lower edge of the fan frame is subjected to the pressure of the screw head and the fan holder at the same time, the force balance is not easily deformed. However, the screw of the fixed structure needs to use a special screwdriver to install and disassemble the fan. Will.

The present invention aims to provide a heat sink that is stable in use and easy to install.

A heat dissipating device includes a fan fixing frame and a fan disposed on the fan fixing frame. The fan fixing frame is formed with a plurality of protruding columns, and the fan forms a plurality of fixing holes for the protruding columns to pass through, and the heat dissipating device further comprises a sleeve a plurality of fixing members disposed on the protruding post and passing through the fixing holes of the fan, each fixing member includes a plurality of locking claws, the outer side of the locking claw abuts against the fan, and the inner side of the locking claw is clamped On the stud of the fan holder, the stud passes through the locking claw and extends beyond the locking claw.

Compared with the prior art, the fixing member in the above heat dissipating device has a simple structure, and the fan can be firmly mounted on the fan fixing frame only by using the locking claws of the fixing member, and no other tools are required when the fan is installed, and the operation is convenient.

10‧‧‧ radiator

12‧‧‧ center column

14‧‧‧ Thermal Conducting Branch

16‧‧‧Heat fins

20‧‧‧Fan holder

21‧‧‧ outer wall

210‧‧‧ openings

22‧‧‧ lugs

24‧‧‧Bump

25‧‧‧ Groove

26‧‧‧Fixed feet

28‧‧‧ Ribs

29‧‧‧ screws

30‧‧‧Fan

31‧‧‧ frame

32‧‧‧ top edge

33‧‧‧ bottom edge

330‧‧‧Fixed holes

35‧‧‧Rotor

40‧‧‧Fixed parts

41‧‧‧Base

42‧‧‧Coordination column

420‧‧‧ top board

422‧‧‧ slot

43‧‧‧Locking claws

44‧‧‧Flexible arm

45‧‧‧Locking Department

452‧‧‧ channel

47‧‧‧through hole

1 is an exploded perspective view of a heat sink of the present invention.

Figure 2 is an enlarged view of one of the fasteners of Figure 1, wherein one of the fasteners of the fastener is removed to reveal the internal structure of the fastener.

3 is a perspective assembled view of a heat sink of the present invention.

Figure 4 is a cross-sectional view taken along line IV-IV of Figure 3.

Referring to FIG. 1 , a heat dissipation device according to an embodiment of the invention includes a heat sink 10 , a fan holder 20 , a fan 30 , and four fixing members 40 . The fan holder 20 is disposed on the heat sink 10 , and the fixing members 40 are sleeved on the fan holder 20 and pass through the fan 30 . The fan 30 is thereby fixed on the fan holder 20.

The heat sink 10 has a cylindrical shape as a whole, and has a cylindrical central column 12 and four heat conducting branch portions 14 extending radially outward along the periphery of the central column 12. The four heat conducting branch portions 14 are curved. And distributed symmetrically around the center column 12. The central post 12 and the thermally conductive branch portion 14 extend outward to form a plurality of fins 16 having fins, and the ends of the fins 16 are in the same circumferential surface.

The fan mount 20 includes a tubular outer wall 21. The outer wall 21 encloses an opening 210. The airflow generated by the fan 30 can be blown to the corners of the heat sink 10 through the opening 210 to accelerate the heat dissipation of the heat sink 10. The four ribs 28 are equally spaced apart from the top end of the outer wall 21 to extend horizontally inward. The top end of the outer wall 21 extends horizontally outward to form four lugs 22. Each lug 22 is placed between two adjacent ribs 28. The lugs 22 are symmetrically distributed around the outer wall 21. The lug 22 is coplanar with the rib 28 and parallel to the top surface of the heat sink 10. Each lug 22 projects upwardly at its intermediate position to form an elongated post 24. An annular groove 25 is formed in each of the lugs 22 around the studs 24. Four fixing legs 26 are formed at the position of the outer wall 21 near the bottom end thereof. The fixing legs 26 are symmetrically distributed around the outer wall 21. A screw 29 is passed through each of the fixing legs 26 for fixing the fan holder 20. Each of the fixed legs 26 and its adjacent lugs 22 are offset from each other to provide an assembly space for the screws 29.

The fan 30 includes a substantially rectangular frame 31 and a rotor 35 housed in the frame 31. The frame 31 has a top edge 32 and a bottom edge 33. Four fixing holes 330 are formed in the four corners of the top and bottom edges 32, 33. The four fixing holes 330 on the bottom edge 33 correspond to the four bosses 24 on the fan holder 20. The protrusion 24 on the fan holder 20 can pass through the fixing hole 330 on the bottom edge 33 of the fan 30 to place the fan 30 on the fan. Fixed on frame 20.

Referring to FIG. 2 at the same time, each fixing member 40 includes a base 41 and a cylindrical support post 42 extending upward from the center of the base 41. The base 41 has a shape of a cone that removes the top end, that is, the area of the circular top surface is larger than the area of the circular bottom surface, so that the base 41 can be properly received in the annular groove 25 of the fan holder 20. A top plate 420 is provided at the top of the mating column 42. A through hole 47 is formed in the fitting column 42 and penetrates the base 41 downward. The matching post 42 is provided with four uniformly distributed slots 422 starting from a position near the lower end thereof, and the slots 422 are inserted through the top plate 420, whereby the matching post 42 and the top plate 420 are divided by the slot 422 to form four locks. Claw 43. The slots 422 are in communication with the through holes 47.

Each of the locking claws 43 is substantially L-shaped and includes a resilient arm 44 and a locking portion 45 extending horizontally inwardly from the end of the resilient arm 44. The resilient arm 44 is a portion of the mating post 42 and the latching portion 45 is a portion of the top plate 420. A curved surface is formed between the bottom surface of the locking portion 45 and the inner wall surface of the elastic arm 44. The four locking claws 43 are symmetrical to each other and are disposed separately. The latching portions 45 of the latching claws 43 are disposed face to face and form a passage 452 in the middle which communicates with the through hole 47 in the mating post 42.

The outer diameter of the mating post 42 of the fixing member 40 is slightly smaller than the inner diameter of the fixing hole 330 of the fan 30 so that the fixing member 40 can pass through the fixing hole 330 of the fan 30. The diameter of the through hole 47 in the fixing member 40 is equivalent to the diameter of the stud 24 on the fan holder 20, so that the stud 24 can pass through the through hole 47. After the mating post 42 of the fixing member 40 is sleeved on the boss 24 of the fan holder 20, the elastic arm 44 of the locking claw 43 can be bent outward to be elastically deformed. The elastic deformation of the resilient arm 44 produces an elastic force directed toward the middle of the locking portion 45, so that the locking portion 45 is firmly clamped to the stud 24.

Referring to FIG. 3-4 at the same time, when the heat sink is assembled, the fan holder 20 is covered on the heat sink 10. The fixing member 40 is pre-set on the protrusion 24 of the lug 22 of the fan holder 20, wherein the bottom surface of the locking portion 45 of the fixing member 40 is in contact with the top surface of the boss 24. The fan 30 is pre-set on the protrusion 24 of the lug 22 of the fan holder 20. At this time, the fixing member 40 is disposed in the fixing hole 330 of the bottom edge 33 of the fan 30, and the base 41 and the fan 30 of the fixing member 40 are disposed. The bottom surface of the bottom edge 33 is in contact. Then, the fan 30 is pressed down along the protrusion 24 together with the fixing member 40, so that the base 41 of the fixing member 40 is received in the groove 25 of the fan holder 20, and the bottom edge 33 of the fan 30 and the fan holder 20 contacts. At this time, the outer side of the locking claw 43, that is, the elastic arm 44 of the locking claw 43 abuts against the upper end of the bottom edge 33 of the fan 30, the inner side of the locking claw 43, that is, the locking portion 45 of the locking claw 43 The jaws are clamped onto the studs 24 of the fan mount 20 to prevent the fan 30 from slipping out of the studs 24.

More specifically, when the fan 30 and the fixing member 40 are pressed downward, the boss 24 on the fan holder 20 sequentially passes through the through hole 47 in the fixing member 40 and the passage 452 between the locking portions 45. Since the passage 452 is small, the elastic arms 44 of the locking claws 43 are elastically deformed outwardly, thereby generating an elastic force directed to the middle of the respective locking portions 45. At this time, the elastic arm 44 of the locking claw 43 abuts against the upper end 33 of the bottom edge 33 of the fan 30 to prevent the fan 30 from coming off the fixing member 40, and the locking portion 45 of the locking claw 43 is clamped to the fan holder. The stud 24 of the 20 prevents the fixing member 40 from coming off the boss 24 of the fan holder 20, so that the fan 30 is firmly fixed to the fan holder 20. In addition, since the fixing member 40 is further provided with a base 41 at the bottom end thereof that is engaged with the bottom edge 33 of the fan 30, the fixing member 40 can be further prevented from falling off from the boss 24 of the fan holder 20; The base 41 and the resilient arms 44 abut against the bottom edge 33 of the fan 30, respectively At both ends, the fan 30 can be more securely fixed to the fan holder 20.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧ radiator

12‧‧‧ center column

14‧‧‧ Thermal Conducting Branch

16‧‧‧Heat fins

20‧‧‧Fan holder

21‧‧‧ outer wall

210‧‧‧ openings

22‧‧‧ lugs

24‧‧‧Bump

25‧‧‧ Groove

26‧‧‧Fixed feet

28‧‧‧ Ribs

29‧‧‧ screws

30‧‧‧Fan

31‧‧‧ frame

32‧‧‧ top edge

33‧‧‧ bottom edge

330‧‧‧Fixed holes

35‧‧‧Rotor

40‧‧‧Fixed parts

Claims (9)

A heat dissipating device includes a fan holder and a fan disposed on the fan holder. The fan holder is formed with a plurality of protrusions, and the fan forms a plurality of fixing holes for the protrusions to pass through. The improvement is as follows: a plurality of fixing members disposed on the protruding post and passing through the fixing holes of the fan, each fixing member includes a plurality of locking claws, the outer side of the locking claw abuts against the fan, and the inner side clamp of the locking claw On the stud of the fan holder, the stud passes through the locking pawl and extends beyond the locking pawl. The heat dissipating device of claim 1, wherein each of the fixing members comprises a base sandwiched between the fan and the fan fixing frame, and a supporting column is formed upwardly from the base, and the supporting column is sleeved on The stud is passed through the fixing hole of the fan. The heat dissipating device of claim 2, wherein the matching column further has a top plate, and the plurality of slots are formed on the matching column and the top plate, so that the matching column and the top plate are divided to form the locking claws. The heat dissipating device of claim 3, wherein each of the locking claws has an L shape, and includes a resilient arm and a horizontally extending end portion of the elastic arm to form a locking portion, the elastic arm abutting Relying on the fan, the locking portion is clamped on the stud of the fan holder. The heat dissipating device of claim 4, wherein the elastic arm is a part of the mating column, and the latching portion is a part of the top plate. The heat dissipating device of claim 4, wherein the locking claws are separated from each other and symmetrically distributed. The heat sink of claim 4, wherein the fan has a bottom edge The fixing holes are formed on the bottom edge, and the base of the fixing member and the elastic arms of the locking claw abut against the lower ends of the bottom edge respectively. The heat dissipating device of claim 2, wherein a ring groove of the base for receiving the fixing member is formed on the fan holder and around the protruding post. The heat dissipating device of claim 1, further comprising a heat sink disposed under the fan holder, the heat sink comprising a center pillar, a plurality of heat conducting branches formed by the center pillar extending outward, and the The central column and the heat conducting branch portion extend outward to form a plurality of heat dissipating fins.