Patent Application
20100307719
1. Technical Field
The present disclosure relates generally to a heat dissipation device, and more particularly to a heat dissipation device having a clip for facilitating securing of a heat pipe to a heat-absorbing plate thereof.
2. Description of Related Art
Generally, in order to ensure the normal running of an electronic device, a heat dissipation device is used to dissipate heat generated by the electronic device.
A typical heat dissipation device includes a heat sink, a heat-absorbing plate and a heat pipe with two opposite ends thereof respectively connecting the heat-absorbing plate and the heat sink. The heat-absorbing plate is provided for contacting the electronic device and absorbing heat therefrom. The heat pipe is utilized to transfer heat from the heat-absorbing plate to the heat sink. Usually the end of the heat pipe and the heat-absorbing plate are combined together by soldering for ensuring an intimate contacting therebetween. However, such a fixing mechanism has shortcomings such as high cost and unreliability. There is a risk that the heat pipe and the heat-absorbing plate are connected together without sufficient solder, or even worse that the soldering does not effectively connect the heat pipe and the heat-absorbing plate together, which results in an insufficient contacting between the heat pipe and the heat-absorbing plate, and directly affects a heat dissipation efficiency of the heat dissipation device.
What is need therefore is a heat dissipation device and a method for manufacturing thereof which can overcome the limitation described.
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.
The heat sink 10 comprises a plurality of parallel fins 12. The fins 12 are vertically arranged such that a plurality of vertical channels 13 are defined therebetween. An opening (not labeled) is defined in the middle of each fin 12. The openings cooperatively define a receiving groove 120 to receive the heat pipe 30.
The centrifugal fan 20 comprises a frame 22 and an impeller 24 rotatably received in the frame 22. A round air inlet 220 is defined in a middle of a top of the frame 22. A straight air outlet (not labeled) is defined at a rear side of the frame 22 corresponding to the channels 13 of the heat sink 10. The air generated by the centrifugal fan 20 flows through the air outlet into the channels 13.
The heat pipe 30 is flattened and comprises a straight evaporating section 32, a straight condensing section 34, and a bending connecting section 36 interconnecting the evaporating section 32 and the condensing section 34. The evaporating section 32 is attached to the heat-absorbing plate 50. The condensing section 34 is received in the groove 120 of the heat sink 10.
The heat-absorbing plate 50 is substantially a rectangular plate and made of material with high heat conductivity such as copper or aluminum. A bottom surface of the heat-absorbing plate 50 is attached to the heat-generating component 10. Two first slots 52 are respectively defined through the heat-absorbing plate 50 and located adjacent to two opposite lateral sides of the heat-absorbing plate 50. The first slots 52 are provided for extension of parts of the clip 40 therethrough. Two columned studs 54 are formed at two ends of each first slot 52. The studs 54 stand on a top surface of the heat-absorbing plate 50. Two rectangular concaves 56 are defined in two lateral sides of the bottom surface of the heat-absorbing plate 50. Each concave 56 is located at an outer lateral side of a corresponding first slot 52 and spaced therefrom.
The clip 40 is an integral metal plate and comprises a substantially inverted U shaped abutting portion 42 and two locking portions 44 extending downwardly from two opposite bottom ends of the abutting portion 42. The abutting portion 42 spans the condensing portion 32 of the heat pipe 30 and has two holding arms 420 holding two sides of the condensing portion 32 of the heat pipe 30. The clip 40 shown in
Each locking plate 70 comprises a fixing part 71 fixed on the heat-absorbing plate 50 and two assembly parts 73 extending from two ends of the fixing part 71. A second slot 72 is defined in the middle of the fixing part 71 corresponding to the first slot 52 of the heat-absorbing plate 50. Two holes 74 are defined at two sides of the second slot 72 to correspond to the studs 54 of the heat-absorbing plate 50. The studs 54 can be interferentially engaged in the holes 74 and then riveted to the locking plates 70 to thereby secure the locking plates 70 on the heat-absorbing plate 50. A mounting hole (not labeled) is defined in a free end of each assembly part 73 of each locking plate 70 for a fastener (not labeled) extending therethrough to fix the locking plate 70 onto the printed circuit board.
Also referring to
It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 200910302935.4 | Jun 2009 | CN | national |
