TWI384125B - Fan structure - Google Patents

Description

Fan structure

The present invention relates to a fan structure, and more particularly to a fan structure that can be thinned.

As shown in FIG. 1 , the conventional fan structure 100 includes a base 110 , a circuit board 120 , a fan 130 , a stator 140 , and a housing 150 . The circuit board 120 , the fan 130 , and the stator 140 are The stator 140 is coupled to the fan 130 and electrically connected to the circuit board 120 to operate the fan 130, and the housing 150 is coupled to the base 110 to protect the circuit board. The stator 140 and the fan 130 are disposed on the base 110 of the conventional fan structure 100. Therefore, the thickness of the conventional fan structure 100 is thick and does not match. The requirements for thinning the fan structure.

The main purpose of the present invention is to provide a fan structure including a fan, a circuit board and a stator. The fan has a hub and a plurality of blades. The circuit board has a fan setting area and a fan. An electronic component setting area outside the fan setting area and a fan driving circuit, the fan system is disposed in the fan setting area, and the fan setting area includes a pair of first setting areas of the hub and a pair of blades The second setting area, wherein the size of the fan is smaller than the size of the circuit board, the stator is disposed in the fan setting area and combined with the fan, the stator is electrically connected to the fan driving circuit of the circuit board. Since the fan and the stator are directly disposed on the circuit board having the fan driving circuit, the arrangement of the fan base is omitted, which has the advantages of cost saving and thinning of the fan structure.

Referring to FIG. 2, a fan structure 200 is disclosed in an embodiment of the present invention. The fan structure 200 includes a fan 210, a circuit board 220, a stator 230, and a bearing assembly 240. The fan 210 has a hub. 211, a plurality of blades 212 and a shaft 213, the circuit board 220 has a fan setting area 221, an electronic component setting area 222 located outside the fan setting area 221 and a fan driving circuit 223, see the third 4, the shape of the fan setting area 221 may be circular or rectangular, or, please refer to the figures 5, 6 and 7, in another embodiment, the circuit board 220 can be directly circular, rectangular Or cross-shaped, please refer to the figures 2, 3 and 4, the fan 210 is disposed in the fan setting area 221, and the fan setting area 221 includes a pair of first setting areas 221a of the hub 211 and a pair of should The second mounting area 221b of the fan blades 212, wherein the size of the fan 210 is smaller than the size of the circuit board 220, the fan driving circuit 223 includes at least one fan driving chip 223a. In this embodiment, the fan driving The wafer 223a can be a Hall IC. Fan drive train wafer 223a may be provided to the electronic device 222 or the fan setting region setting region 221, in this embodiment, the fan is disposed in the drive train 222 223a wafer to thin-fan configuration setting region of the electronic component.

Referring to FIG. 2 , the stator 230 is disposed in the fan installation area 221 and coupled to the fan 210 . The stator 230 is electrically connected to the fan driving circuit 223 of the circuit board 220 to drive the fan 210 to operate. The bearing assembly 240 is disposed in the first installation area 221a of the fan installation area 221, the bearing assembly 240 is coupled to the stator 230 and the fan 210, and the bearing assembly 240 includes a shaft tube 241 and a bearing 242 disposed in the shaft tube 241, the bearing 242 has a through hole 242a, and the fan setting area 221 has an opening 221c and at least one ventilation space 221d. In this embodiment, the ventilation space 221d The second installation area 221b is located in the fan setting area 221, and the ventilation space 221d exposes the plurality of blades 212, which may be slots or holes for gas circulation, and the through hole 242a of the bearing 242 is Corresponding to the opening 221c of the fan setting area 221, the axis 213 of the fan 210 is inserted into the through hole 242a of the bearing 242. In addition, please refer to FIG. 8 , the center point I of the hub 211 The center point I' of the fan setting area 221 is in the same line, and the center point I' of the fan setting area 221 to the outer side edge 221b' of the second setting area 221b has a spacing H, and the spacing H is It is larger than the radius r of the hub 211. Since the fan 210 and the stator 230 are directly disposed on the circuit board 220 having the fan driving circuit 223, the arrangement of the conventional fan base can be omitted, which has the advantages of cost saving and thinning of the fan structure.

Next, referring to FIGS. 9A, 9B, 10A, 10B, 11A, and 11B, the fan structure 200 further includes a housing 250, and the circuit board 220 further has a housing setting area 224, the housing setting area. The 224 is located outside the fan setting area 221, and the housing 250 is coupled to the housing setting area 224 of the circuit board 220. Referring to FIGS. 9A and 9B, the housing 250 has a coupling hole 251. The circuit The plate 220 has a fixing hole 225 corresponding to the fixing hole 225 and is coupled to the fixing hole 225 by a locking member (not shown). The locking member is optional. Since the screw or adhesive, in addition, please refer to FIG. 7. When the circuit board 220 is directly cross-shaped, the circuit board 220 has at least one rib L, and the housing setting area 224 is located on the rib. The fixing hole 225 is located on the housing setting area 224. Alternatively, please refer to FIGS. 10A and 10B. In another embodiment, the housing 250 has a plug portion A, the circuit board. The 220 series has a plug slot A', and the plug portion A is coupled to the plug slot A', or, as shown in Figures 11A and 11B, In one embodiment, the system housing 250 having a hook portion B, the circuit board 220 having a fastener system B ', the engaging member B based bonded to the hook portion B.

The scope of the present invention is defined by the scope of the appended claims, and any changes and modifications made by those skilled in the art without departing from the spirit and scope of the invention are within the scope of the present invention. .

100. . . Fan structure

110. . . Pedestal

120. . . Circuit board

130. . . fan

140. . . stator

150. . . case

200. . . Fan structure

210. . . fan

211. . . Wheel hub

212. . . Fan blade

213. . . Axis

220. . . Circuit board

221. . . Fan setting area

221a. . . First setting area

221b. . . Second setting area

221b’. . . Outer edge

221c. . . Opening

221d. . . Ventilation space

222. . . Electronic component setting area

223. . . Fan drive circuit

223a. . . Fan drive chip

224. . . Housing setting area

225. . . Fixed hole

230. . . stator

240. . . Bearing assembly

241. . . Shaft tube

242. . . Bearing

242a. . . Through hole

250. . . case

251. . . Bonding hole

A. . . Plug-in

A’. . . Docking slot

B. . . Buckle

B’. . . Fastener

H. . . spacing

I. . . Center point of the hub

I’. . . Center point of the fan setting area

L. . . Rib

r. . . radius

Figure 1: Schematic cross-section of a conventional fan structure.

Figure 2 is a schematic cross-sectional view of a fan structure in accordance with an embodiment of the present invention.

Figure 3 is a top plan view of a circuit board of the fan structure in accordance with an embodiment of the present invention.

Figure 4: A top view of a circuit board of the fan structure in accordance with an embodiment of the present invention.

Figure 5: A top view of a circuit board of the fan structure in accordance with another embodiment of the present invention.

Figure 6 is a top plan view of a circuit board of the fan structure in accordance with another embodiment of the present invention.

Figure 7 is a top plan view of a circuit board of the fan structure in accordance with another embodiment of the present invention.

Figure 8 is an exploded perspective view of a fan and circuit board of the fan structure in accordance with an embodiment of the present invention.

Figure 9A is a schematic cross-sectional view of the fan structure having a housing in accordance with an embodiment of the present invention.

Figure 9B is a schematic cross-sectional view of the fan structure having a housing in accordance with another embodiment of the present invention.

Figure 10A is a schematic cross-sectional view of the fan structure having a housing in accordance with an embodiment of the present invention.

Figure 10B is a schematic cross-sectional view of the fan structure having a housing in accordance with another embodiment of the present invention.

Figure 11A is a schematic cross-sectional view of the fan structure having a housing in accordance with an embodiment of the present invention.

Figure 11B is a schematic cross-sectional view of the fan structure having a housing in accordance with another embodiment of the present invention.

210‧‧‧fan

211‧‧ wheels

212‧‧‧ fan leaves

213‧‧‧Axis

220‧‧‧Circuit board

221‧‧‧Fan setting area

221a‧‧‧First setting area

221b‧‧‧Second setting area

221c‧‧‧Opening

221d‧‧‧ Ventilation space

222‧‧‧Electronic component setting area

223‧‧‧Fan drive circuit

223a‧‧‧Fan driver chip

224‧‧‧Shell setting area

230‧‧‧ Stator

240‧‧‧ bearing assembly

241‧‧‧ shaft tube

242‧‧‧ bearing

242a‧‧‧through hole

Claims (22)

A fan structure includes: a fan having a hub and a plurality of blades; a circuit board having a fan setting area, an electronic component setting area outside the fan setting area, and a fan drive a fan, the fan is disposed in the fan setting area, and the fan setting area includes a pair of first setting areas of the hub and a pair of second setting areas corresponding to the blades, wherein the size of the fan is smaller than the circuit a size of the board; and a stator that is disposed in the fan setting area and coupled to the fan, the stator is electrically connected to the fan driving circuit of the circuit board. The fan structure of claim 1, wherein the fan driving circuit comprises at least one fan driving chip, and the fan driving chip is disposed in the electronic component setting area. The fan structure of claim 1, wherein the fan driving circuit comprises at least one fan driving chip, and the fan driving chip is disposed in the fan setting area. The fan structure of claim 1, further comprising a casing, wherein the circuit board further has a casing setting area, the casing setting area is located outside the fan setting area and the casing is coupled The housing setting area of the circuit board. The fan structure of claim 4, wherein the housing has a plug portion, and the circuit board has a plug slot, and the plug portion is coupled to the plug slot. The fan structure of claim 4, wherein the housing has a catching portion, and the circuit board has a fastening member, and the fastening member is coupled to the hook portion. The fan structure of claim 4, wherein the housing has a coupling hole, and the circuit board has a fixing hole corresponding to the fixing hole and the coupling hole is coupled by a locking member. With the fixing hole. The fan structure of claim 1, wherein the fan installation area has at least one ventilation space. The fan structure of claim 8, wherein the venting space is located in the second setting area. A fan structure comprising: a fan having a hub and a plurality of blades; a circuit board having a fan setting area, an electronic component setting area and a fan driving circuit, wherein the fan system is disposed on a fan setting area, wherein the fan setting area includes a pair of first setting areas of the hub and a pair of second setting areas of the plurality of blades, wherein the size of the fan is smaller than the size of the circuit board, and the hub The center point is in the same line as the center point of the fan setting area, and a center point of the fan setting area to an outer side edge of the second setting area has a pitch which is greater than a radius of the hub; The fan is disposed in the fan setting area and is coupled to the fan, and the stator is electrically connected to the fan driving circuit of the circuit board. The fan structure of claim 10, wherein the fan driving circuit comprises at least one fan driving chip, and the fan driving chip is disposed in the electronic component setting area. The fan structure of claim 10, wherein the fan driving circuit comprises at least one fan driving chip, and the fan driving chip is disposed in the fan setting area. The fan structure of claim 10, further comprising a casing, wherein the circuit board further has a casing setting area, the casing setting area is located outside the fan setting area and the casing is coupled The housing setting area of the circuit board. The fan structure of claim 13, wherein the housing has a plug portion, and the circuit board has a plug slot, and the plug portion is coupled to the plug slot. The fan structure of claim 13, wherein the housing has a hook portion, and the circuit board has a fastening member, and the fastening member is coupled to the hook portion. The fan structure of claim 13, wherein the housing has a coupling hole, and the circuit board has a fixing hole corresponding to the fixing hole and the coupling hole is coupled by a locking component. With the fixing hole. The fan structure of claim 10, wherein the fan installation area has at least one ventilation space. The fan structure of claim 17, wherein the venting space is located in the second setting area. A fan structure, comprising: a fan having a hub and a plurality of blades; a circuit board having a fan setting area and a fan driving circuit, wherein the fan is disposed in the fan setting area, and The fan installation area includes a pair of first installation areas of the hub and a pair of second installation areas of the plurality of blades, wherein the size of the fan is smaller than the size of the circuit board, and the center point of the hub and the fan The center point of the setting area is located on the same straight line, and a center point of the fan setting area to an outer side edge of the second setting area has a spacing, the spacing is greater than a radius of the hub; and a certain sub-set is disposed on the The fan setting area is coupled to the fan, and the stator is electrically connected to the fan driving circuit of the circuit board. The fan structure of claim 19, further comprising a casing, wherein the circuit board further has a casing setting area, the casing setting area is located outside the fan setting area and the casing is coupled The housing setting area of the circuit board. The fan structure of claim 19, wherein the fan setting area has at least one ventilation space. The fan structure of claim 21, wherein the venting space is located in the second setting area.