TWI658775B - Power supply device and cooling fan - Google Patents

Abstract

A power supply device and a cooling fan thereof. The cooling fan includes a fan frame, a rotating shaft connected to the fan frame, and a plurality of fan blades connected to the rotating shaft. The fan frame is provided with a fixed structure, and the axial direction of the fixed structure is perpendicular to The axial direction of the rotating shaft is connected to the casing of the power supply device by a fixing structure. Since the axial direction of the fixed structure is perpendicular to the axial direction of the rotating shaft, compared with the connection method in the prior art where the screw locking direction is parallel to the axial direction of the rotating shaft, the creepage distance between the fixed structure and the main circuit board of the present invention is longer, The circuit board does not need to increase the circuit board area in order to achieve a fixed creepage distance, and can effectively increase the circuit wiring space on the main circuit board under the premise of ensuring the creepage distance.

Description

   Power supply device and cooling fan   

The invention relates to a cooling fan and a power supply device provided with the cooling fan.

There are many power components on the circuit board of the power supply. These power components generate a lot of heat during work. If the heat is not released in time, excessive temperature will affect the performance and service life of the power components. Therefore, a fan is usually provided on the housing of the power supply, and the fan accelerates the flow of air around the circuit board to quickly remove the heat generated by the power components on the circuit board.

A conventional fixing method of the cooling fan 20 'of the power supply 1' is shown in Fig. 1. First, a fixing seat 40 'is provided on the lower plate 11' of the casing 10 ', and a hole is formed in the fixing seat 40'. The axial direction of the perforation is parallel to the axial direction of the fan blade rotation axis 21 ′, and a through hole 22 ′ corresponding to the perforation is formed axially on the outer frame of the air outlet end of the cooling fan 20 ′. The screw 50` in 22` locks the cooling fan 20` to the fixing base 40`, and the screw 50` protrudes from the end face of the air inlet end of the cooling fan 20`.

The above-mentioned fixing method using the screw lock has the following disadvantages: (1) The fixing base 40` and the screw 50` will protrude outward from the cooling fan 20`, thereby occupying the internal space of the power supply 1` and affecting the main circuit The size of the plate 30`. (2) The locking direction of the screw 50` is parallel to the axial direction of the fan blade rotation axis 21`. One end of the screw 50` protrudes from the end face of the air inlet end of the cooling fan 20`. Therefore, the screw 50` and the main circuit board 30` The distance is relatively short, in order to avoid the short circuit arc and spark discharge between the screw 50` and other components on the main circuit board 30`, a creepage distance (insulation distance) is required between the two, so that the main circuit board 30` is on the Insufficient circuit wiring space. (3) Setting the above creepage distance under the premise of ensuring circuit wiring space will increase the area of the main circuit board 30 ′, which will inevitably increase the volume of the power supply 1 ′, making the product unable to be miniaturized.

Therefore, it is necessary to provide a power supply and a cooling fan that can ensure the creepage distance and the circuit wiring space on the main circuit board, and can effectively increase the internal space, so as to solve the above-mentioned shortcomings of the prior art.

One of the objectives of the present invention is to provide a cooling fan capable of ensuring the creepage distance and the circuit wiring space on the main circuit board and effectively increasing the internal space of the power supply device.

Another object of the present invention is to provide a power supply device capable of ensuring creepage distance and circuit wiring space on a main circuit board and effectively increasing the internal space.

To achieve the above object, the present invention provides a cooling fan, which includes a fan frame, a rotating shaft connected to the fan frame, and a plurality of fan blades connected to the rotating shaft, wherein the fan frame is provided with a fixed structure, and the axial direction of the fixed structure is The heat dissipating fan is connected to the casing through a fixing structure perpendicular to the axial direction of the rotating shaft.

In an embodiment of the present invention, the fixing structure is a fixing hole or groove provided on the fan frame, and the axial direction of the fixing hole or groove is perpendicular to the axial direction of the rotating shaft.

In an embodiment of the present invention, the fan frame includes a plurality of side plates connected in sequence, and the fixing hole or the groove is opened on at least one side plate.

In an embodiment of the present invention, the groove is opened at the connection of the adjacent two side plates.

In an embodiment of the present invention, a through mounting hole is enclosed between the plurality of side plates, a mounting portion is provided on one side of the fan frame, and the rotating shaft is connected to the mounting portion and accommodated in the mounting hole.

In order to achieve the above object, the present invention further provides a power supply device including a casing and a heat dissipation fan connected to the casing. The heat dissipation fan includes a fan frame, a rotating shaft connected to the fan frame, and a plurality of fans connected to the rotating shaft. The fan frame is provided with a fixed structure. The axial direction of the fixed structure is perpendicular to the axial direction of the rotating shaft. The heat dissipation fan is connected to the casing through the fixed structure.

In an embodiment of the present invention, the fixing structure is a fixing hole or groove provided on the fan frame, and the axial direction of the fixing hole or groove is perpendicular to the axial direction of the rotating shaft.

In an embodiment of the present invention, the casing includes an upper plate body, a lower plate body, and a side plate body connected between the two. The cooling fan is connected to at least one of the upper plate body, the lower plate body, and the side plate body.

In an embodiment of the present invention, the housing is provided with a locking structure corresponding to the fixing structure, the axial direction of the locking structure is perpendicular to the axial direction of the rotating shaft, and the locking structure is correspondingly connected with the fixing structure to fix the cooling fan. On the shell.

In an embodiment of the present invention, the locking structure is a locking member or a positioning member provided on the housing, and the axial direction of the locking member or the positioning member is perpendicular to the axial direction of the rotating shaft.

In an embodiment of the present invention, a through hole corresponding to the fixing hole is provided on the casing, and the lock member is fixed in the through hole and the fixing hole in this order.

In an embodiment of the invention, the locking member is a screw.

In an embodiment of the present invention, the positioning member is a folded plate protrudingly disposed on the housing, the folded plate corresponds to the groove and its axial direction is perpendicular to the axial direction of the rotating shaft, and the folded plate is correspondingly fixed in the groove. .

Compared with the prior art, since the axial direction of the fixing structure provided on the fan frame of the present invention is perpendicular to the axial direction of the rotating shaft, the heat dissipation fan is connected to the housing of the power supply device through the fixing structure. Therefore, in the axial direction of the rotating shaft of the cooling fan, the fixing structure does not protrude outward from the fan frame, thereby effectively increasing the internal space of the power supply device; meanwhile, compared with the prior art, the direction of screw fixing is parallel to the axial direction of the rotating shaft. In the connection mode, the creepage distance (insulation distance) between the fixed structure of the present invention and the main circuit board is long, and the main circuit board does not need to increase the circuit board area in order to achieve a fixed creepage distance, and can ensure the creepage distance. Effectively increase the circuit wiring space on the main circuit board; at the same time, the structure is simple, the assembly is convenient, and the manufacturing cost is effectively saved. Correspondingly, the power supply device having the cooling fan of the present invention also has the same technical effect.

1‧‧‧ power supply device

10‧‧‧shell

11‧‧‧ lower plate

12‧‧‧ Upper plate

13‧‧‧side plate

14‧‧‧Locking structure

141‧‧‧lock firmware

142‧‧‧through hole

143‧‧‧First Folding Plate

144‧‧‧Second Folding Plate

20‧‧‧cooling fan

21‧‧‧fan frame

211‧‧‧First side plate

212‧‧‧Second side plate

213‧‧‧Third side plate

214‧‧‧Fourth side plate

215‧‧‧Mounting hole

216‧‧‧Mounting Department

217‧‧‧Wire Trough

22‧‧‧ shaft

23‧‧‧fan leaves

24, 24’‧‧‧ fixed structure

241‧‧‧First groove

242‧‧‧Second groove

243‧‧‧Third groove

244‧‧‧Fourth groove

30‧‧‧Main circuit board

31‧‧‧Electronic components

50’‧‧‧screw

D, d‧‧‧ Creepage distance

FIG. 1 is a schematic diagram of a fixing manner of a cooling fan in the prior art.

FIG. 2 is a schematic structural diagram of an embodiment of a cooling fan according to the present invention.

FIG. 3 is a schematic structural diagram of a fan frame in FIG. 2.

FIG. 4 is a schematic structural diagram of a part of a casing that cooperates with the cooling fan in FIG. 2.

FIG. 5 is a schematic structural diagram of another embodiment of a cooling fan according to the present invention.

FIG. 6 is a schematic structural diagram of a fan frame in FIG. 5.

FIG. 7 is a schematic structural diagram of the cooling fan matching the casing in FIG. 5.

FIG. 8 is a schematic diagram of the positional relationship between the heat sink fan and the main circuit board after the heat sink is fixed according to the present invention.

With reference to FIG. 2 to FIG. 7, the power supply device 1 provided by the present invention includes a casing 10 and a cooling fan 20 connected to the casing 10. Referring to FIGS. 4 and 7, the housing 10 includes a lower plate body 11, an upper plate body 12, and a side plate body 13 connected between the two. The cooling fan 20 is fixed to the lower plate body 11, the upper plate body 12, and the side plates. At least one of the bodies 13.

The cooling fan 20 includes a fan frame 21, a rotating shaft 22, and a plurality of fan blades 23. The rotating shaft 22 is connected to the fan frame 21, and the plurality of fan blades 23 are connected to the rotating shaft 22. The fan frame 21 is provided with a fixing structure 24. The axial direction of the fixing structure 24 is perpendicular to the axial direction of the rotating shaft 22. Correspondingly, the housing 10 is provided with a locking structure 14 (as shown in FIG. 4) corresponding to the fixing structure 24. The axial direction of the locking structure 14 is perpendicular to the axial direction of the rotating shaft 22 of the cooling fan 20. The locking structure 14 is correspondingly connected to the fixing structure 24 to fix the heat dissipation fan 20 on the casing 10.

In the present invention, other structures of the power supply device 1 are well known to those skilled in the art, and therefore will not be described again. In the following, only different embodiments of the cooling fan 20 of the power supply device 1 of the present invention and the structure of the corresponding casing 10 are described with reference to the drawings.

First referring to FIG. 2 and FIG. 3, in an embodiment of the cooling fan 20 according to the present invention, the fan frame 21 includes a first side plate 211, a second side plate 212, and a first side plate 212 connected between the two side plates. The three side plates 213 and the fourth side plate 214 define a through-hole 215 between the four side plates. A side of the fan frame 21 is provided with a mounting portion 216 corresponding to the mounting hole 215. The rotating shaft 22 is connected to the mounting portion 216. A plurality of fan blades 23 are connected to the rotating shaft 22 and accommodated in the mounting holes 215.

The fixing structure 24 is a fixing hole opened in at least one of the first side plate 211, the second side plate 212, the third side plate 213, and the fourth side plate 214. The axial direction of the fixing hole is perpendicular to the axial direction of the rotating shaft 22.

In this embodiment, the first side plate 211, the second side plate 212, the third side plate 213, and the fourth side plate 214 are all provided with fixing holes, and preferably two fixing holes are respectively provided in each side plate to achieve stable heat dissipation. The effectiveness of the fan 20. However, the number of holes to be opened is not limited, and only one fixing hole may be provided. For example, one end of the third side plate 213 is provided with a wire slot 217, which is used to guide the cable electrically connected to the cooling fan 20, so only A fixing hole is opened in the third side plate 213 for locking.

Understandably, the number of side plates of the fan frame 21 is not limited to four, and the provision of other numbers of side plates does not affect the implementation of the technical solution.

With reference to FIG. 4, the locking structure 14 on the casing 10 includes a locking member 141 and a through hole 142 formed in the casing 10. The position of the through hole 142 corresponds to the fixing hole, and the locking member 141 is connected to the through hole Inside 142 and its axial direction is perpendicular to the axial direction of the rotating shaft 22, the heat dissipation fan 20 is connected to the casing 10 through the locking member 141 correspondingly connected to the fixing hole.

In this embodiment, the lower plate body 11, the upper plate body 12, and the side plate body 13 of the casing 10 are respectively provided with through holes 142 corresponding to the fixing holes, so that the user can selectively connect the cooling fan 20 to the lower plate. At least one of the body 11, the upper plate body 12, and the side plate body 13 is on.

Continuing to refer to FIG. 4, in this embodiment, the heat dissipation fan 20 is fixed to the casing 10 through the locking member 141 and the fixing hole on one side plate of the fan frame 21, for example, the first side plate 211 is locked. Fixed to the upper plate 12 of the casing 10, or locked the second side plate 212 to the lower plate 11 of the casing 10, or one of the third side plate 213 and the fourth side plate 214 to one of the casing 10侧板 体 13。 Side plate body 13. However, it is not limited to this, and two or more side plates of the fan frame 21 may be locked to the casing 10.

Preferably, the locking member 141 in this embodiment is a screw, but is not limited thereto, and other locking members may also be used to fix the cooling fan 20.

Referring to FIG. 5 to FIG. 7, in another embodiment of the heat dissipation fan 20 of the present invention, the difference from the heat dissipation fan 20 in the above embodiment is only in the fixed structure 24 ′, and other structures are the same, and will not be described again. The following only describes the differences between the two.

As shown in FIG. 5 and FIG. 6, in this embodiment, the fixing structure 24 ′ is a groove opened on at least one side plate of the fan frame 21, and the axial direction of the groove 24 ′ is perpendicular to the rotation axis of the cooling fan 20. In the axial direction of 22, the cooling fan 20 is fixed on the casing 10 by the groove 24 '.

As shown in FIG. 6, in a preferred embodiment of the present invention, grooves 24 ′ are provided at the joints of adjacent two side plates of the fan frame 21, that is, the grooves 24 ′ are provided in four pairs of the fan frame 21. Corner. Specifically, a first groove 241 and a second groove 242 are respectively provided at the joints of the second side plate 212 with the third side plate 213 and the fourth side plate 214, and the connection between the first side plate 211 and the third side plate 213 and the fourth side plate 214 A third groove 243 and a fourth groove 244 are respectively opened at each place.

With reference to FIG. 7, the locking structure 14 is a positioning member provided on the housing 10. The position of the positioning member corresponds to the position of the groove 24 ′, and the axial direction of the positioning member is perpendicular to the rotation axis of the cooling fan 20. In the axial direction of 22, the positioning member is correspondingly fixed in the groove 24 'to connect the heat dissipation fan 20 to the casing 10.

In this embodiment, the locking structure 14 includes a first folded plate 143 and a second folded plate 144 formed by bending the lower plate body 11 inward. The first folded plate 143 corresponds to the first groove 241 and the second folded The plate 144 corresponds to the second groove 242, and is inserted into the first groove 241 through the first folding plate 143, and is inserted into the second groove 242 through the second folding plate 144, thereby fixing the cooling fan 20 to the casing. The lower plate body 11 of the body 10.

Of course, the folding plate is not limited to the plate body 11 below the housing 10, and the plate body 12 above the housing 10 may be bent inward to form a third corresponding to the third groove 243 and the fourth groove 244. The folding plate (not shown) and the fourth folding plate (not shown), the user can configure the component according to requirements or components to fix the cooling fan 20 on the casing 10 through the third folding plate and the fourth folding plate.板 体 12 上.

Understandably, if a folding plate is provided on the side plate body 13 of the casing 10, the installation of the cooling fan 20 can also be realized.

In this embodiment, the cooling fan 20 is fixed on the casing 10 by using the groove 24 ′ on the fan frame 21 and the folding plate of the casing 10 itself, without using screws, clamps or other fixing members to fix the cooling fan 20. The cooling fan 20 effectively saves manufacturing costs and facilitates assembly.

Referring to FIG. 8, after the cooling fan 20 of the power supply device 1 of the present invention is fixed to the casing 10, the cooling fan 20 is fixed by using the fixing structure 24 and the locking member 141 whose axial direction is perpendicular to the rotating shaft 22. Compared with the conventional screw 50 'locking direction parallel to the axial direction of the rotating shaft 22, the creepage distance (insulation distance) D of the lock 141 of the present invention and the electronic component 31 on the main circuit board 30 is larger than the conventional screw 50` (the locking direction is parallel to the axis of the rotating shaft 22) and the creepage distance d of the electronic component 31 on the main circuit board 30. For example, if the creepage distance D is the minimum creepage distance specified in the safety regulations, In order to achieve the minimum creepage distance, the screw 50 ′ (the locking direction is parallel to the axial direction of the rotating shaft 22) needs to increase the distance between the main circuit board 30 / or the electronic component 31 and the cooling fan 20. Therefore, the cooling fan 20 of the present invention is beneficial to the miniaturization of the product; and because the distance between the fixed structure 24 and the main circuit board 30 is large, the wiring on the main circuit board can be effectively increased on the premise of reaching a fixed creepage distance. In addition, since the fixing structure 24 and the locking structure 14 do not protrude from the fan frame 21 in the axial direction of the rotating shaft 22, the internal space of the power supply device 1 is effectively increased.

In summary, since the cooling fan 20 of the present invention includes a fan frame 21, a rotating shaft 22, and a plurality of fan blades 23, the fan frame 21 is provided with a fixing structure 24, and the axial direction of the fixing structure 24 is perpendicular to the axis of the rotating shaft 22. In the axial direction, the cooling fan 20 is connected to the casing 10 of the power supply device 1 through the fixing structure 24. Therefore, in the axial direction of the rotating shaft 22 of the cooling fan 20, the fixing structure 24 does not protrude outward from the fan frame 21, thereby effectively increasing the internal space of the power supply device 1; and is parallel to the screw-locking direction in the prior art With regard to the axial connection of the rotating shaft 22, the creepage distance (insulation distance) between the fixed structure 24 and the electronic component 31 on the main circuit board 30 of the present invention is long, and the main circuit board 30 does not need to achieve a fixed creepage distance. Increasing the area of the circuit board and ensuring the creepage distance can effectively increase the circuit wiring space on the main circuit board 30; at the same time, the structure is simple, the assembly is convenient, and the manufacturing cost is effectively saved.

Correspondingly, the power supply device 1 having the cooling fan 20 of the present invention also has the same technical effect.

The above disclosure is only the preferred embodiments of the present invention. Of course, the scope of rights of the present invention cannot be limited by this. Therefore, equivalent changes made according to the scope of the patent application for the present invention still fall within the scope of the present invention. .

Claims (13)

A cooling fan includes a fan frame, a rotating shaft connected to the fan frame, and a plurality of fan blades connected to the rotating shaft. The fan frame is provided with a fixed structure, and the axial direction of the fixed structure is perpendicular to In the axial direction of the rotating shaft, the cooling fan is connected to a casing by the fixing structure, wherein the casing is provided with a locking structure corresponding to the fixing structure, and the axial direction of the locking structure is perpendicular to In the axial direction of the rotating shaft, the locking structure is correspondingly connected to the fixing structure to fix the cooling fan on the casing, so as to increase the creepage between the locking structure and an electronic component of a main circuit board in the casing. Electric distance. The cooling fan according to item 1 of the patent application scope, wherein the fixing structure is a fixing hole or a groove provided on the fan frame, and the axial direction of the fixing hole or the groove is perpendicular to the axis of the rotating shaft. to. The cooling fan according to item 2 of the patent application scope, wherein the fan frame includes a plurality of side plates connected in sequence, and the fixing hole or the groove is opened on at least one of the side plates. The cooling fan according to item 3 of the scope of patent application, wherein the groove is opened at a connection between two adjacent side plates. The cooling fan according to item 3 of the scope of patent application, wherein a plurality of through-holes are enclosed between the side plates, a side of the fan frame is provided with a mounting portion, and the rotating shaft is connected to the mounting portion and accommodates it. In the mounting hole. The cooling fan according to item 2 of the scope of patent application, wherein the locking structure is a locking member provided on the housing and a through hole provided on the housing, and the through hole corresponds to the fixing hole. The axial direction of the locking member is perpendicular to the axial direction of the rotating shaft. The cooling fan according to item 6 of the patent application scope, wherein the locking member is a screw. The cooling fan according to item 2 of the scope of patent application, wherein the locking structure is a positioning member provided on the casing, and the axial direction of the positioning member is perpendicular to the axial direction of the rotating shaft, wherein the positioning member is convex A folded plate provided on the casing, the folded plate corresponds to the groove, and the folded plate is correspondingly fixed in the groove. A power supply device includes a casing, a cooling fan connected to the casing, and a main circuit board disposed in the casing. The cooling fan includes a fan frame and a fan frame connected to the fan frame. The rotating shaft and a plurality of fan blades connected to the rotating shaft. The fan frame is provided with a fixed structure. The axial direction of the fixed structure is perpendicular to the axial direction of the rotating shaft. The cooling fan is connected to the casing through the fixed structure. On the main circuit board, at least one electronic component is provided. The housing is provided with a locking structure corresponding to the fixed structure. The axial direction of the locking structure is perpendicular to the axial direction of the rotating shaft. The fixing structure is correspondingly connected with the fixing structure to fix the cooling fan on the casing, so as to increase the creepage distance between the locking structure and the electronic component of the main circuit board. The power supply device according to item 9 of the scope of patent application, wherein the fixing structure is a fixing hole or a groove provided on the fan frame, and the axial direction of the fixing hole or the groove is perpendicular to the rotation shaft. Axial. The power supply device according to item 9 of the scope of patent application, wherein the housing includes an upper plate body, a lower plate body, and a side plate body connected between the two, and the cooling fan is connected to the upper plate body and the lower plate. Body, at least one of the side plate body. The power supply device according to item 10 of the scope of patent application, wherein the locking structure is a lock or a positioning member provided on the housing, and the axial direction of the lock or the positioning member is perpendicular to the axial direction of the rotating shaft. . The power supply device according to item 12 of the scope of patent application, wherein the locking structure further includes a through hole corresponding to the fixing hole provided on the housing, and the locking member is sequentially fixed to the through hole and the fixing hole. Inside.