JP3070872U - fan - Google Patents

Abstract

(57) [Abstract] [Problem] To eliminate noise, increase rotation speed and air flow,
Provide a fan with an extended life. SOLUTION: A dustproof cover plate 21, a fan blade plate structure 2 are provided.
2, magnet 23, sleeve 24, starter 25, rotating plate 2
6, a housing base 27 and a pressing board 28 are provided. There is an annular gap A between the fan blade plate structure 22 and the inner annular portion 273 of the housing base 27. Magnet 2
3 is integrally connected to the fan blade plate structure 22, and the starter 25 is located in the magnet 23 and
2 is driven. The sleeve 24 is fitted to the starter 25, the circuit board 26 is integrally fixed to the sleeve 24, the central shaft 223 of the fan blade plate structure 22 is fitted to the central hole of the pressing plate 28, and the pressing plate 28 Are integrally connected to the fan blade plate structure 22 and the magnet 23. When the fan blade plate structure 22 rotates, the pressing plate 28
A pressing gap B is formed between the housing base 27 and the housing base 27.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention can be attached to system units and devices that require heat dissipation, cooling or convection.For example, it can be used in a computer CPU to force convection cooling, and has low noise, high speed, and long service life. Regarding long fans.

[0002]

[Prior art]

 As shown in FIG. 1, for example, a conventional general fan includes a fan blade plate structure 11, a magnet 12, a starter 13, a sleeve 14, a circuit board 15, a ball bearing 16, a pressing spring 17, a pressing washer 18 and A housing base 19 is included. The ball bearing 16 is used to support the rotation of the fan blade plate structure. When the fan rotates at a high speed, the noise is large due to the contact friction between the ball bearing 16 and the central shaft of the fan blade plate structure 11. Another problem is that the rotation speed cannot be increased.

In addition, when the fan rotates at a high speed, an axial pushing force is generated. This is because the fan blade plate structure 11 and the pressing spring 17 and the pressing washer 18 are in direct contact with each other, generating noise and increasing the frictional force. And the pressing washer 18 is worn and damaged.

[0004]

[Problems to be solved by the invention]

 In the above-described conventional fan configuration, when the fan rotates at a high speed, the noise is large, and the spring and the washer are in direct contact with each other, so that the abrasion is large and easily damaged. Therefore, an object of the present invention is to provide a fan that eliminates contact friction between the central shaft of a conventional fan blade plate structure and a ball bearing, thereby eliminating noise, increasing the rotation speed and air volume, and extending the life. It is in.

[0005]

Means for Solving the Problems According to the first aspect of the present invention, there is provided a fan for solving the above-mentioned problems, comprising a fan blade plate structure, a magnet, a starter, a sleeve, a circuit board, and a housing. A base and a pressing board are provided. The fan blade plate structure has a fan blade plate, a flow guide hole formed on an upper surface, a central axis extending vertically from a lower surface, and an outer annular portion. The magnet is fixed inside the fan blade so as to be integrally connected to the fan blade structure. The starter has a central hole and is provided in the magnet without being in contact with the magnet. The sleeve has an inner annular portion having a diameter larger than the diameter of the central shaft, and is fitted in the central hole of the starter. The circuit board has a central hole and is integrally fixed to the sleeve. The housing base has a flow guide groove, a central hole, and an inner annular portion, and the inner annular portion forms an annular gap with the outer annular portion. The pressing plate has a flow guide groove and a central hole, and the end of the central shaft is fitted into the central hole, so that the fan blade plate structure and the magnet are integrally connected, and the fan blade plate structure is formed. When the is rotated, the pressing plate forms a pressing gap with the bottom surface of the housing base.

According to the fan of the present invention, when the fan blade plate structure rotates, the annular gap forms a pressure bearing by the introduced air, and the pressing gap is pushed by the introduced air. A stop bearing is formed, the housing base, starter, sleeve and circuit board are stationary, and the fan blade plate structure, magnets and retaining plate are not in contact with the stationary housing base, starter, sleeve and circuit board. Rotate with.

According to the third aspect of the present invention, a groove is formed in at least one of the outer annular portion of the fan blade plate structure and the inner annular portion of the housing base. According to the fan according to the fourth aspect of the present invention, a spiral groove or a step groove is formed in the flow guide groove of the pressing plate and / or the bottom surface of the housing base.

[0008] A fan according to a fifth aspect of the present invention includes a dustproof cover plate, and the dustproof cover plate is mounted on an upper side of the fan blade plate structure. As described above, the fan of the present invention mainly includes the fan blade plate structure, the magnet, the sleeve, the starter, the circuit board, the housing base, and the pressing plate. With the dynamic pressure distribution of the present invention, support and pressing are obtained, so that the noise of friction generated at the time of high-speed operation in the past is reduced, and the service life is increased.

[0009]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 2 and 3, the fan according to one embodiment of the present invention includes a dustproof cover plate 21, a fan blade plate structure 22, a magnet 23, a sleeve 24, a starter 25, a rotating plate 26, a housing base 27, Including a retaining plate 28. An air entry hole 211 is provided at the center of the dustproof cover plate 21, but the description of this portion will be omitted.

The fan blade plate structure 22 has a plurality of fan blade plates 221, a plurality of flow guide holes 222 formed in the upper surface, and extends vertically from the lower surface of the fan blade plate structure 22. There is a central axis 223. There is an annular gap A between the outer annular portion 224 of the fan blade plate structure 22 and the inner annular portion 273 of the housing base 27. The outer shape of the magnet 23 is annular. The magnet 23 is fixed inside the plurality of fan blade plates 221 and is combined with the fan blade plate structure 22 to be integral therewith.

The starter 25 is inside the magnet 23 and is not in contact with the magnet 23. The starter 25 has a central hole 251 and is provided with a plurality of magnetic poles whose polarity can be changed, so that the rotation of the fan blade plate structure 22 to which the magnet 23 is attached can be driven. The sleeve 24 is fitted into the central hole 251 of the starter 25, and has an annular outer shape. The diameter of the inner annular portion 241 of the sleeve 24 is larger than the diameter of the central shaft 223.

The circuit board 26 is integrally fixed to the sleeve 24 and has a central hole 261. The housing base 27 has a flow guide groove 271 and a central hole 272. The pressing plate 28 has a flow guide groove 281 and a central hole 282, and the end of the central shaft 223 is fitted in the central hole 282 of the pressing plate 28, and the fan blade plate structure 22 and the magnet 23 They are integrally connected. When the fan blade plate structure 22 rotates, a pressing gap B is formed between the pressing plate 28 and the bottom surface of the housing base 27.

Accordingly, when the fan blade plate structure 22 rotates, the annular gap A forms a pressure bearing by the introduced air, and the pushing gap B forms a pressing bearing by the introduced air. Then, the rotating fan blade plate structure 22, the magnet 23 and the pressing plate 28 are prevented from coming into contact with the completely stationary housing base 27, starter 25, sleeve 24 and circuit board 26.

As shown in FIG. 2, assembling the fan according to the present embodiment, a dustproof cover plate 21, a fan blade plate structure 22 (including a magnet 23), a sleeve 24, a starter 25, a circuit board 26, and a housing The base 27 and the pressing plate 28 are assembled and connected in order. First, the sleeve 24 is press-fitted into the center hole 251 of the starter 25 and then into the center hole 261 of the circuit board 26. Then, it is pressed into the central hole 272 of the housing base 27 and fixed. Subsequently, the outer annular portion 224 of the fan blade plate structure 22 and the inner annular portion 273 of the housing base 27 are gently combined. Next, the center hole 282 of the pressing plate 28 is tightened and combined with another surface at the bottom of the housing base 27 and the center shaft 223 of the fan blade plate structure 22. Finally, the hook groove 212 of the dustproof cover plate 21 and the hook 274 of the housing base 27 are mixed by press-fitting, and the assembly is completed.

FIG. 3 shows the principle of operation. Air enters through the flow guide hole 222 of the fan blade plate structure 22, passes through the flow guide groove 271 of the housing base 27, and forms an annular portion between the outer annular portion 224 of the fan blade plate structure 22 and the inner annular portion 273 of the housing base 27. And flows out from the bottom of the housing base 27 to form an air pressure film. Thus, the air bearing has the function of supporting the dynamic pressure air floating and forms a pneumatic bearing on the outer annular portion 224 of the fan blade plate structure 22 and the inner annular portion 273 of the housing base 27. In order to enhance the stability of the pneumatic bearing, the outer annular portion 224 of the fan blade plate structure 22 or the inner annular portion 273 of the housing base 27 is formed into a spiral shape or a human shape as shown in FIGS. Grooves can be provided.

Further, when air flows between the inner annular portion 24 of the sleeve 24 and the central shaft 223 of the fan blade plate structure 22, the air is guided by the flow of the pressing plate 28 by the high-speed rotation of the pressing plate 28. It flows out of the groove 281 and is pressed at the pushing gap B to form a pneumatic film. The push-stop pressure film is a push-stop bearing. The flow path of the air is as shown in FIG. 10, and the fan rotates at a high speed to produce a high-pressure film, and supports the load exerted by the gravity of the fan and the wind resistance. Flow plan of the pressing plate 28 The inner groove 281 may have a different shape. For example, as shown in FIGS. 6 to 9, a spiral groove or a step groove may be used. Alternatively, the flow guide groove may be formed at the center of the bottom surface of the housing base 27.

[0017]

[Effect of the invention]

 The present invention is practical because it improves the performance of fans with conventional ball bearings and can be used to dissipate heat for CPUs or other electronic components.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one conventional fan.

FIG. 2 is an exploded perspective view showing the fan according to the embodiment of the present invention;

FIG. 3 is a sectional view showing a fan according to an embodiment of the present invention;

FIG. 4 is a diagram showing an outer annular portion of the fan blade plate structure and an inner annular portion of the housing base according to the embodiment of the present invention;

FIG. 5 is a view showing an outer annular portion of the fan blade plate structure and an inner annular portion of the housing base according to the embodiment of the present invention;

FIG. 6 is a view showing a center portion of a bottom surface of a pressing plate and a housing base according to the embodiment of the present invention;

FIG. 7 is a view illustrating a center portion of the bottom surface of the pressing plate and the housing base according to the embodiment of the present invention;

FIG. 8 is a view illustrating a center portion of a bottom surface of the pressing plate and the housing base according to the embodiment of the present invention;

FIG. 9 is a view showing a center portion of the bottom surface of the pressing plate and the housing base according to the embodiment of the present invention;

FIG. 10 is a cross-sectional view illustrating the flow of air of the fan according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 22 fan blade plate structure 23 magnet 24 sleeve 25 starter 26 circuit board 27 housing base 28 pressing plate 221 fan blade plate 222 flow guide hole 223 central shaft 224 outer annular portion 241 inner annular portion 251 central hole 261 central hole 271 flow guide Groove 272 Central hole 273 Inner annular portion 281 Flow guide groove 282 Central hole A Annular gap B Pressing gap

Claims (5)

[Utility model registration claims] 1. A fan blade plate structure, comprising a magnet, a starter, a sleeve, a circuit board, a housing base, and a retaining plate, wherein the fan blade plate structure includes a fan blade plate, A flow guide hole, a central axis extending perpendicularly from the lower surface, and an outer annular portion, wherein the magnet is provided on the fan blade plate so as to be integrally connected to the fan blade plate structure. Fixed inside, the starter has a central hole and is provided in the magnet without being in contact with the magnet; and the sleeve has an inner annular portion having a diameter larger than the diameter of the central shaft. Wherein the circuit board has a central hole and is integrally fixed to the sleeve, and the housing base has a flow guide groove, a central hole and an inner annular portion. Having its inner annular part Forms an annular gap with the outer annular portion, the pressing plate has a flow guide groove and a central hole, and the end of the central shaft is fitted into the central hole, and the fan blade plate The fan, wherein the pressing plate is formed integrally with the structure and the magnet and forms a pressing gap between the pressing plate and the bottom surface of the housing base when the fan blade plate structure rotates. 2. When the fan blade plate structure rotates, the annular gap forms a pressure bearing by the introduced air, and the pressing gap forms a pressing bearing by the introduced air. The housing base, the starter, the sleeve, and the circuit board are stationary, and the fan blade plate structure, the magnet, and the pressing plate are not in contact with the stationary housing base, starter, sleeve, and circuit board. The fan according to claim 1, wherein the fan rotates. 3. An outer annular portion of the fan blade plate structure,
The fan according to claim 1, wherein a groove is formed in at least one of the inner annular portion of the housing base. 4. The pneumatic bearing according to claim 1, wherein a spiral groove or a step groove is formed in at least one of the flow guide groove of the pressing plate and the bottom surface of the housing base. One fan. 5. The fan according to claim 1, further comprising a dustproof cover plate, wherein the dustproof cover plate is mounted above the fan blade plate structure.