TWI574147B - Fan structure - Google Patents

Description

Fan structure

The fan structure of the present invention is a plurality of circularly arranged positioning holes on the surface of the circuit board, and a plurality of coils are wound with at least one wire on the plurality of winding posts that pass through the positioning holes, and the two ends of the wires are welded. It is set on the control circuit preset on the circuit board, which simplifies the process of winding multiple coils on the outside and then placing the circuit board, thereby reducing the assembly cost required for operation.

According to the current development of high technology, electronic devices such as desktop computers, notebook computers, tablet computers or smart phones are designed to be light, thin, short and small, in order to reduce the electronic device indoors. The occupied space or the convenience for people to carry the electronic device is such that the electronic device is even 1 mm or 2 mm, so the electronic components inside the electronic device must also be considered for assembly and thickness.

Generally, electronic devices generate heat energy during operation, so most of them are provided with a brushless motor fan. The brushless motor fan has a casing, and a shaft portion is disposed on an inner wall surface of the casing, and a gasket, a magnetic conductive member and a circular circuit board are sleeved around the periphery of the shaft portion, and the circuit board is a plurality of coils and a detecting component are disposed on the surface, and a fan is pivotally connected to the shaft portion. The fan is provided with a ring magnet opposite to the plurality of coils and the detecting component on the inner side, and the magnet is set by using a magnetizing method. There are staggered N magnetic poles and S magnetic poles.

In the actual application, the brushless motor fan detects the through the detecting component The magnetic field of the magnet changes (the change of the S pole and the N pole), the circuit board changes according to the magnetic field of the magnet to control the complex coil to generate an alternating magnetic field, so that the plurality of coils sequentially repel the N magnetic pole of the magnet and S The magnetic pole, in turn, drives the fan to rotate, thereby performing heat dissipation on the inside of the electronic device.

However, the process of combining the plurality of coils of the brushless heat-dissipating fan on the circuit board requires that the enamel wire is externally wound into a plurality of coils, and then the plurality of coils are soldered one by one on the circuit board, and the process is quite complicated and equivalent. It is easy to weld failure and consumes a lot of manpower and time, which increases the defect rate and assembly cost.

Therefore, how to solve the problem that the conventional brushless cooling fan is too complicated due to its complex coil process and assembly on the circuit board, thereby increasing the defect rate and the assembly cost, is the research and improvement of the relevant manufacturers engaged in this industry. The direction of the person.

Therefore, in view of the above-mentioned problems and deficiencies, the inventors have collected relevant information, and through multi-party evaluation and consideration, and through years of experience in the industry, through continuous trial and modification, the invention of this fan structure was born. .

The main purpose of the present invention is that the surface of the base of the outer casing is concavely provided with a receiving groove, and a shaft portion is protruded from the bottom surface of the receiving groove, and the shaft portion has a fixing portion around the bottom surface of the receiving groove, and then fixed. A plurality of winding posts are arranged around the portion, and the circuit module has a circuit board, and a plurality of positioning holes are annularly arranged on the surface of the circuit board, and at least one wire coil is wound on the plurality of winding posts of the positioning holes. A plurality of coils are wound, and the two ends of the wires are soldered to a predetermined control circuit of the circuit board, thereby simplifying winding a plurality of coils on the outside and placing the plurality of head ends of the plurality of coils on the circuit board , the process of soldering on the circuit board, thereby reducing the defect rate and assembly cost .

1‧‧‧Shell

11‧‧‧

110‧‧‧ accommodating slots

111‧‧‧Axis

1110‧‧‧ shaft slot

112‧‧‧Fixed Department

1121‧‧‧winding column

1122‧‧‧ Fixed disk

1123‧‧‧through hole

113‧‧‧First air vent

114‧‧‧ channel

1141‧‧‧ buckle

115‧‧‧ openings

116‧‧‧ Groove

12‧‧‧ Cover

121‧‧‧Second air vent

122‧‧‧ plates

1221‧‧‧ buttonhole

13‧‧‧Magnetic parts

2‧‧‧Rotary Module

21‧‧‧fan

211‧‧‧ joint groove

212‧‧‧ fan leaves

22‧‧‧Axis joint

221‧‧‧shims

222‧‧‧ bearing

223‧‧‧ shaft core

23‧‧‧The Ministry of Magnetics

231‧‧‧ Carrying tray

2310‧‧‧ docking slot

2311‧‧‧through hole

232‧‧‧ Magnet

2321‧‧‧South Magnetic Area

2322‧‧‧North Magnetic Area

3‧‧‧Circuit Module

31‧‧‧ boards

311‧‧‧Perforation

312‧‧‧Positioning holes

313‧‧‧ Limit set

32‧‧‧ coil

321‧‧‧ head end

33‧‧‧Detection components

The first figure is a three-dimensional appearance of the present invention.

The second figure is a perspective exploded view of the present invention.

The third figure is an exploded perspective view of another embodiment of the present invention.

The fourth figure is an exploded perspective view of another perspective of the present invention.

Figure 5 is an exploded perspective view of another embodiment of the present invention.

Figure 6 is a side cross-sectional view of the present invention.

In order to achieve the above objects and effects, the technical means and the configuration of the present invention will be described in detail with reference to the preferred embodiments of the present invention.

Please refer to the first, second, third, fourth, fifth and sixth figures, which are stereoscopic and stereoscopic views of the present invention, three-dimensional decomposition of another embodiment, three-dimensional exploded view of another perspective, and another implementation. A perspective exploded view and a side cross-sectional view of another embodiment, as is clear from the figure, the present invention includes a housing 1, a rotary module 2 and a circuit module 3, wherein the housing 1 includes a seat body 11, a cover body 12 and a magnetic conductive member 13; the base body 11 has a receiving groove 110 recessed in the surface thereof, and a shaft portion 111 is protruded from the bottom surface of the receiving groove 110, and the shaft portion 111 is concave at the top. The shaft groove 1110 is provided, and has a fixing portion 112 around the shaft portion 111 at the bottom surface of the accommodating groove 110, and a plurality of winding posts 1121 on the fixing portion 112, and the base body 11 is disposed in the accommodating groove 110. Have a fix at A plurality of first air vents 113 are formed on the periphery of the portion 112, and a plurality of channels 114 are disposed at the periphery of the body 11. The plurality of channels 114 are respectively convexly disposed on the surface of the block 1141, and are disposed on the outer side of the body 11. An opening 115 is formed in the accommodating groove 110, and a groove 116 is disposed on the outer surface of the shaft portion 111 opposite to the shaft portion 111. The cover body 12 is provided with a second air vent 121 on the surface. A plurality of plates 122 are disposed on the periphery of the cover 12, and the plurality of plates 122 are respectively disposed on the surface of the cover plate 122. The magnetic holes are respectively fastened and fixed to the plurality of buckles 114; The member 13 is mounted and fixed in the recess 116.

The slewing module 2 includes a fan 21, a shaft portion 22 and a magnetic portion 23; the fan 21 is received in the accommodating groove 110 of the base body 11, and an engaging groove 211 is recessed on a surface of the fan 21 side. The fan 21 further includes a plurality of adjacent blades 212 arranged around the periphery of the fan 21; the shaft portion 22 includes a gasket 221 and a bearing 222 received in the shaft groove 1110, and is disposed in the bearing 222. The shaft 223 is fixed to the center of the fan 21; the magnetic portion 23 includes a carrier 231 and a ring magnet 232. The carrier 231 is mounted in the engaging groove 211, and the carrier 231 is concave. The through hole 2311 is disposed in the center of the surface of the mating groove 2310, and the magnet 232 is assembled and fixed in the mating groove 2310 of the carrying tray 231, and the magnet 232 is staggered by magnetization. Arranged south magnetic area 2321 and north magnetic area 2322.

The circuit module 3 includes a circuit board 31, a coil 32 and a detecting component 33. The circuit board 31 has a circular plate shape and is provided with a through hole 311 which can be sleeved on the shaft portion 111 at a central position of the surface. A loop for the bobbin 112 is provided around the perforation 311 l The plurality of positioning holes 312 are pierced, and the limiting hole 313 is sleeved on the winding hole 1121 corresponding to the positioning hole 312 above the circuit board 31, and is further disposed on the winding column 1121 of the positioning hole 312. At least one wire is wound with a plurality of coils 32, and the plurality of coils 32 extend to have two ends 321 soldered on the circuit board 31. However, the surface of the circuit board 31 is soldered with detection elements adjacent to the plurality of positioning holes 312. 33. The circuit board 31 and the plurality of coils 32 and the detecting component 33 have a predetermined circuit configuration, and the detecting component 33 can be a Hall sensing chip for sensing the strength of the magnetic field.

In the preferred embodiment of the present invention, the base 11 has a fixing portion 112, and a plurality of winding posts 1121 are annularly formed on the surface of the fixing portion 112, and the winding post 1121 can be integrally formed with the fixing portion 112. The circuit board 31 is placed in the receiving slot 110 of the base 11, and the winding post 1121 is inserted into each positioning hole 312, and the limiting sleeve 313 above the circuit board 31 is sleeved and fixed on the bobbin 1121. Then, the plurality of coils 32 are wound on the bobbin 1121 with at least one wire, and the two ends 321 of the wire are soldered to the preset control circuit on the circuit board 31, thereby eliminating the need to place the plurality of coils 32 on the circuit board. The step of 31 does not require labor to weld the two ends 321 of the plurality of wires one by one to the circuit board 31, thereby reducing the defect rate and the assembly cost.

Another embodiment (third and fifth figures) of the present invention is that the plurality of winding posts 1121 of the base 11 can also be manufactured separately from the fixing portion 112, and the plurality of winding posts 1121 are integrally formed below and have a disk shape. The fixing plate 1122 is coupled to the surface of the fixing portion 112, and a through hole 1123 through which the shaft portion 111 is bored is disposed at the center of the surface of the fixing plate 1122, and the circuit board 31 is passed through the winding column 1121. The positioning hole 312 is sleeved and fixed to the winding post 112 of the limiting sleeve 313 above the circuit board 31. 1 , and a plurality of coils 32 are wound on the bobbin 1121 with at least one wire, and the two ends 321 of the wire are soldered to a preset control circuit on the circuit board 31; wherein the bottom of the fixing plate 1122 is coupled to The bonding on the surface of the fixing portion 112 is by chemical bonding, welding, high-frequency thermal fusion or other equivalent means.

However, in another embodiment, the fixing plate 1122 can take out the accommodating groove 110 and pass the bobbin 1121 on the fixing plate 1122 out of the positioning hole 312 of the circuit board 31, and then make the circuit board 31 above. The limiting sleeve 313 is sleeved and fixed on the bobbin 1121, and at least one wire is wound on the bobbin 1121 to form a plurality of coils 32, and the two ends 321 of the wires are soldered on the circuit board 31. The preset control circuit is not assembled in the accommodating groove 110 of the outer casing 1 because the circuit module 3 is assembled, so that the winding and the welding are not caused by the inconvenient operation of the narrow accommodating groove 110. Assembly failure, which in turn increases product yield.

Furthermore, the shaft portion 111 of the outer casing 1 of the present invention is preferably configured to have a shaft groove 1110, and the shaft portion 22 of the rotary module 2 located at the center of the fan 21 is sleeved with a bearing 222 and then positioned at the shaft core 223. In the shaft groove 1110 of the shaft portion 111, the shaft portion 22 can be rotatably rotated on the shaft portion 111 when the fan 21 is operated. However, in the actual application, the shaft portion 111 of the outer casing 1 can also be provided with a shaft core (in the figure) Not shown), after the bearing is sleeved on the shaft core, the shaft core is positioned through the bearing in the corresponding shaft groove on the shaft joint portion 22, so that the shaft core can be matched with the bearing and the shaft groove for positional exchange. The fan 21 can be pivotally connected to the shaft portion 111 of the outer casing 1 to achieve a rotation function.

The invention can be installed in a computer, a notebook computer or any electronic device (not shown) for heat dissipation, and in actual application, the circuit board 31 transmits the The detecting component 33 detects the magnetic field strength of the magnet 232 above it, thereby identifying the south magnetic region 2321 or the north magnetic region 2322 above the detecting component 33 for use as the input voltage of the circuit board 31 to the plurality of coils 32. The information about the opening or closing is formed, wherein the circuit board 31 controls the complex coil 32 to generate an alternating magnetic field during use, so that the plurality of coils 32 alternately attract and repel the south magnetic region 2321 and the north magnetic region of the magnet 232. 2322 drives the fan 21 to rotate, thereby further dissipating the electronic device.

When the fan 21 rotates, the plurality of first air vents 113 are used as air outlets, and the second air vents 121 are used as air inlets, thereby forming an axial fan structure design (not shown). The fan 21 does not need to have an opening 115. When the seat body 11 is provided with an opening 115 that communicates with the receiving slot 110, the fan 21 is provided with the plurality of first air vents 113 as shown. The second air vent 121 is used as an air inlet, and the opening 115 is used as an air outlet, thereby providing a lateral air blowing function similar to a blower.

Therefore, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The present invention is directed to a fan structure including a housing 1, a rotary module 2, and a circuit module 3. The inside of the housing 1 is formed with a receiving groove 110, and a shaft portion 111 is protruded from the bottom of the receiving groove 110, and a fixing portion 112 is provided around the shaft portion 111 at the bottom surface of the receiving groove 110, and the fixing portion is provided. 112 has a plurality of winding posts 1121, and the rotating module has a fan 21, and the fan 21 is provided with a shaft connecting portion 22 pivotally connected to the shaft portion 111, and the circuit module 3 is provided with a circuit board 31 at a periphery of the shaft portion 111, and a plurality of positioning holes 312 are annularly disposed on the surface of the circuit board 31, and a plurality of limiting sleeves 313 are disposed on the plurality of winding posts 1121 of the positioning holes 312. At least one wire is wound with a plurality of coils 32, and the two ends 321 of the wires are soldered to the circuit board 3 In the preset control circuit, the plurality of coils 32 can be directly wound around the plurality of bobbins 1121, thereby simplifying the winding of the plurality of coils 32 on the outside and placing the plurality of coils 32 on the circuit board 31. The process of soldering the two ends 321 of the plurality of wires to the circuit board 31 one by one, thereby reducing the defect rate and the assembly cost, so that the structures and devices that can achieve the foregoing effects are covered by the present invention. Such simple modifications and equivalent structural changes shall be included in the scope of the patent of the present invention and shall be combined with Chen Ming.

In summary, the fan structure of the present invention can achieve its efficacy and purpose when it is used. Therefore, the present invention is a practical and excellent creation, and is in accordance with the application requirements of the invention patent, and submits an application according to law. The Commission will grant this case as soon as possible to protect the hard work of the inventor. If there is any doubt in the trial committee, please do not hesitate to give instructions, the inventor will try his best to cooperate with him.

1‧‧‧Shell

11‧‧‧

110‧‧‧ accommodating slots

111‧‧‧Axis

1110‧‧‧ shaft slot

112‧‧‧Fixed Department

1121‧‧‧winding column

113‧‧‧First air vent

114‧‧‧ channel

1141‧‧‧ buckle

115‧‧‧ openings

12‧‧‧ Cover

121‧‧‧Second air vent

122‧‧‧ plates

1221‧‧‧ buttonhole

13‧‧‧Magnetic parts

2‧‧‧Rotary Module

21‧‧‧fan

212‧‧‧ fan leaves

22‧‧‧Axis joint

221‧‧‧shims

222‧‧‧ bearing

223‧‧‧ shaft core

23‧‧‧The Ministry of Magnetics

231‧‧‧ Carrying tray

2311‧‧‧through hole

232‧‧‧ Magnet

2321‧‧‧South Magnetic Area

2322‧‧‧North Magnetic Area

3‧‧‧Circuit Module

31‧‧‧ boards

311‧‧‧Perforation

312‧‧‧Positioning holes

313‧‧‧ Limit set

32‧‧‧ coil

321‧‧‧ head end

33‧‧‧Detection components

Claims (10)

A fan structure includes a casing, a rotating module and a circuit module, wherein the casing has a receiving groove formed therein, and a shaft portion is protruded from the bottom of the receiving groove, and then around the shaft portion The fixing portion has a plurality of winding posts adjacent to the periphery of the shaft portion; the rotating module has a fan, and the fan is pivotally connected to the shaft portion. And a magnetic portion having a south magnetic region and a north magnetic region staggered at a periphery of the shaft portion; and the circuit module is mounted on the periphery of the shaft portion a circuit board, and a plurality of positioning holes for the bobbin to pass through on the surface of the circuit board, and a plurality of coils are directly wound on the bobbin penetrating the positioning holes, and the plurality of coils are wound on the surface of the circuit board A detecting element is welded adjacent to the positioning hole. The fan structure according to claim 1, wherein the outer casing is provided with a groove on an outer surface of the shaft portion, and a magnetic conductive member for attracting the magnetic portion is disposed in the groove. The fan structure of claim 1, wherein the shaft portion is provided with a shaft groove at the top, and the shaft portion has a gasket and a bearing disposed in the shaft groove, and is in the bearing A shaft core protruding toward the fan is disposed, and the circuit board has a circular plate shape and a through hole for the shaft portion is provided at a center of the surface. The fan structure of claim 1, wherein the outer casing has a seat body, the seat body is concavely provided with a receiving groove on the surface, and the seat body has a shaft portion protruding at the bottom of the receiving groove, and then a fixing portion around the shaft portion, and a surface of the fixing portion is convexly disposed adjacent to the periphery of the shaft portion The plurality of winding bobbins are further provided with a cover body opposite to the receiving groove of the base body. The fan structure of claim 4, wherein the receiving groove of the seat body is provided with a plurality of first air venting ports opposite to the fan at a periphery of the shaft portion, and the cover body is also provided on the surface The fan is opposite to the second air vent. The fan structure of claim 4, wherein the seat body is provided with an opening connected to the receiving groove on an outer side. The fan structure of claim 1, wherein the fan is provided with an engagement groove around the surface of the shaft portion, and the magnetic portion has a carrier plate mounted in the engagement groove, The carrier disk has a matching groove on the surface, and a through hole for the shaft connecting portion is disposed at a center of the surface of the carrier disk, and a ring magnet is disposed on the docking groove, and the ring magnet has the axis The south magnetic zone and the north magnetic zone are arranged in a staggered circumference. The fan structure of claim 4, wherein a plurality of winding posts are integrally formed on the surface of the fixing portion of the base body around the shaft portion, and the plurality of positioning holes of the circuit board are positioned on the winding column. A positioning. The fan structure of claim 1, wherein the circuit board of the circuit module is provided with a limiting sleeve that is sleeved and fixed to a top of the bobbin passing through the positioning hole of the circuit board. The fan structure according to claim 4, wherein a fixed disk is integrally formed under the plurality of winding posts of the base body, and the plurality of winding wires are separately manufactured from the fixing portion, and the bottom of the fixing plate is coupled to the fixing portion. On the surface, a plurality of winding posts are respectively disposed at a plurality of positioning holes of the circuit board.