JP3087160U - Heat dissipation fan structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent the heat radiation fan from affecting its overall height even when it is erected, laid down, or turned upside down, to extend the life of the heat radiation fan, The present invention provides a radiating fan structure which eliminates noise caused by the above-mentioned structure, and which can increase the life by rotating the balls in the ball bearing in the same track, and can reduce the occurrence of noise. SOLUTION: A radiating fan includes an impeller, a coil set, an electric circuit board and a bottom plate, wherein the impeller has a shaft portion, which is attached to the coil set, and the coil set includes an iron case and a magnet. And a winding frame and a bush around which the coil is wound, and a ball bearing and an oil-impregnated bearing which are vertically stacked inside the bush, and an O-ring and a C-ring are provided above and below the ball bearing and the oil-impregnated bearing. Locking the shaft portion, a magnetic device is mounted at a position corresponding to the bottom end of the shaft portion on the bottom plate, the shaft portion is sucked by the magnetic device, and the impeller is suction-fixed at a predetermined position, The magnetic device attracts and fixes the shaft.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a heat dissipation fan structure, in particular, a magnetic device is arranged on the heat dissipation fan, and the magnetic device adsorbs the shaft portion, so that the heat dissipation fan can stand upright, lie down, or stand upside down. The preload is applied to the ball bearing without affecting the height, and the ball in the ball bearing can be rotated in the same track. The present invention relates to a heat dissipating fan structure characterized in that direct friction is not generated, the life of the heat dissipating fan can be greatly improved, and noise generated by friction can be eliminated.

[0002]

[Prior art]

 As shown in FIGS. 1 and 2, the structure of the conventional heat dissipation fan 20 includes an impeller 7, a storage space 71 in the impeller 7, and a shaft vertically downward from an intermediate portion of the storage space 71. The coil set 8 is disposed inside the storage space 71, and the shaft 72 is attached to the inside of the coil set 8. The part 72 is turned to rotate the impeller 7 in conjunction with it. The coil set 8 has an iron case 81, the iron case 81 is mounted in the storage space 71, the magnet 82 is mounted inside the iron case 8, and the coil 83 is wound inside the magnet 82. Frame 84 is mounted. Further, a bush 85 made of a copper material is mounted inside the winding frame 84, and a ball bearing 86 and an oil-containing bearing 87 are mounted on the inside of the bush 85, respectively, so as to overlap with each other. An O-ring 88 is locked above, and a C-ring 89 is locked below the oil-impregnated bearing 87, and the bottom end of the bush 85 is fixed to the electric circuit board 201 and the bottom plate 202.

However, when the coil set 8 is mounted in the storage space 71 of the impeller 7, a predetermined gap is formed between the iron case 81 and the impeller 7, that is, the impeller 7 is vertically moved by the existence of the gap. The gap has a moving stroke, and therefore, the entire height of the heat dissipation fan 20 is different depending on the existence of the gap between the case where the heat dissipation fan 20 is upright and the case where the heat dissipation fan 20 is set upside down. Also, since there is no preload on the ball bearing 86, the balls in the ball bearing 86 cannot be operated in the same trajectory, which not only shortens the life but also often generates noise. In addition, the C ring 89 that is locked to the shaft 72 may also be brought into contact with the oil-impregnated bearing 87 by being set upside down from the heat radiating fan 20, so that the C ring 89 when the shaft 72 rotates. And the oil-impregnated bearing 87 are in frictional contact with each other, which affects the life of the entire heat dissipation fan 20 and often causes noise due to frictional contact.

[0004] In view of the problems of the above-mentioned conventional products, the inventor of the present invention has come to propose a heat dissipation fan structure of the present invention.

[0005]

[Problems to be solved by the invention]

 According to the present invention, a magnetic device is provided in a heat radiation fan, and the magnetic device absorbs a shaft portion so that the heat radiation fan does not affect the overall height of the heat radiation fan even when the fan is erected, laid down, or turned upside down. It is a main object to provide a heat dissipation fan structure characterized by the above.

In addition, the present invention provides a magnetic device to prevent the C ring in the shaft portion and the oil-impregnated bearing from directly rubbing each other, thereby extending the life of the heat radiating fan and eliminating noise caused by friction. The next object is to provide a heat dissipation fan structure that can.

Further, the present invention is characterized in that the shaft is attracted by the magnetic device and the ball in the ball bearing is rotated in the same track so that the life can be increased and the generation of noise can be reduced. Another object of the present invention is to provide a heat dissipating fan structure.

[0008]

[Means for Solving the Problems]

 According to the present invention, the radiating fan includes an impeller, a coil set, an electric circuit board, and a bottom plate, wherein the impeller has a shaft, which is attached to the coil set, and the coil set includes an iron case. It has a winding frame around which a magnet and a coil are wound, a bush, and a ball bearing and an oil-impregnated bearing which are vertically stacked inside the bush. O-rings and Cs are provided on upper and lower portions of the ball bearing and the oil-impregnated bearing. The shaft is locked by a ring, a magnetic device is mounted on the bottom plate at a position corresponding to the bottom end of the shaft, the shaft is attracted by the magnetic device, and the impeller is moved to a predetermined position. Since the magnetic device sucks and fixes the shaft portion, the gap can be slightly generated between the C ring and the oil-impregnated bearing in the shaft portion, so that direct contact friction can be prevented. Wherein since the magnetic device results in a preload to the ball bearing One provides a cooling fan structure which is characterized in that it is possible to operate the ball in the ball bearings within the same track.

[0009]

[Embodiment of the invention]

 The present invention proposes a heat dissipation fan structure. As shown in FIGS. 3 and 4, the heat dissipation fan 10 has an impeller 1, the impeller 1 has a storage space 11, The coil set 2 is mounted in the storage space 11 and the shaft portion 12 is mounted in the coil set 2 to form the coil set 2. The shaft part 12 turns and the impeller 1 rotates in conjunction with the change of the positive and negative polarities. The coil set 2 has an iron case 21, which is mounted in the storage space 11. A magnet 22 is provided inside, and a winding frame 24 around which a coil 23 is wound is mounted inside the magnet 22, and the action of the magnet 22 and the coil 23 causes a change in the positive or negative polarity.

A bush 25 made of a copper material is mounted in the winding frame 24, and a ball bearing 26 and an oil-impregnated bearing 27 are arranged on the upper and lower sides inside the bush 25, respectively. An O-ring 28 is abutted and engaged with the C-ring 29 under the oil-impregnated bearing 27, and the ball bearing 26 and the oil-impregnated bearing 27 are fixed in the bush 25. Are fixed to the electric circuit board 3 and the bottom plate 4.

The feature of the present invention is that the magnetic device 5 is disposed on the bottom plate 4 at a position corresponding to the bottom end of the shaft portion 12, and has a magnet 51 and a magnetic guide piece 52.

As shown in FIG. 4, when assembling, the present invention mounts an iron case 21 in the storage space 11 of the impeller 1, and then mounts a magnet 22 in the iron case 21 and then winds the coil 23. The rotating winding frame 24 is mounted on the magnet 22, and an operating force is generated by the magnet 22 and the coil 23. Further, the ball bearing 26 and the oil-impregnated bearing 27 are mounted in the bush 25, and then the bush 25 is stored in the winding frame 24, and the ball bearing 26 and the oil-impregnated bearing 27 are connected to the shaft 12 by an O-ring 28 and a C-ring 29. When the magnet 51 and the magnetic guide piece 52 of the magnetic device 5 are attached to the bottom plate 4 and correspond to the bottom end of the shaft portion 12, the assembly of the radiation fan 10 is completed.

[0013]

[Effect of the invention]

 The preferred embodiment of the present invention having the above structure has the following advantages. (1) When the heat radiation fan 10 is assembled, the impeller 1 and the coil set 2 are not tightly connected, still have a predetermined gap, and can be moved up and down. And the impeller 1 is fixed at a predetermined position by suction, so that the entire height of the radiating fan 10 is not affected even if the radiating fan 10 is erected, laid down or upside down. (2) Since the magnetic device 5 attracts the shaft portion 12, the magnetic device 5 generates a preload on the ball bearing 26 so that the balls in the ball bearing 26 can move in the same orbit. As a result, the service life can be extended and the effect of reducing noise can be obtained. (3) In addition, since the magnetic device 5 attracts the shaft portion 12 so that a gap is provided between the C ring 29 and the oil-impregnated bearing 27 in the shaft portion 12 so as not to cause direct contact friction, The life of the radiating fan 10 can be greatly increased, and noise during friction can be eliminated.

[Brief description of the drawings]

FIG. 1 is an exploded view of a conventional product.

FIG. 2 is a cross-sectional view of a conventional product.

FIG. 3 is an exploded view showing a heat dissipation fan structure according to a preferred embodiment of the present invention;

FIG. 4 is a cross-sectional view illustrating a structure of a heat dissipation fan according to a preferred embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Impeller 2 Coil set 3 Electric circuit board 4 Bottom plate 5 Magnetic device 10 Heat dissipation fan 11 Storage space 12 Shaft part 21 Iron case 22 Magnet 23 Coil 24 Winding frame 25 Bush 26 Ball bearing 27 Oil bearing 28 O ring 29 C ring 51 Magnet 52 Magnetic guide piece

Claims (3)

[Utility model registration claims] 1. An impeller having a shaft extending vertically downward, attached to the impeller, externally fitted to an outer peripheral edge of the shaft, and housed in a housing space. It has an iron case, a magnet is fitted in the iron case, a winding frame is attached inside the magnet, a bush is attached inside the winding frame, and a vertical A ball bearing and an oil-impregnated bearing are mounted on top of each other, and the shaft is locked by an O-ring and a C-ring above and below the ball bearing, respectively, and the bottom end of the bush is fixed to the electric circuit board and the bottom plate. A heat dissipating fan structure comprising: a coil set; and a magnetic device attached to the bottom plate and adsorbing the shaft portion corresponding to a bottom end of the shaft portion. 2. The impeller has a storage space, and a shaft portion is formed to extend vertically downward from an intermediate portion of the storage space, and the coil set is mounted in the storage space. The heat dissipation fan structure according to claim 1. 3. The radiating fan structure according to claim 1, wherein the magnetic device has a magnet and a magnetic guide piece.