CN216871159U

CN216871159U - Industrial test computer with multiple USB ports

Info

Publication number: CN216871159U
Application number: CN202220660838.3U
Authority: CN
Inventors: 陈家斌; 陈丽瑶; 周康明
Original assignee: Shenzhen Boga Electronics Co ltd
Current assignee: Shenzhen Boga Electronics Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-01
Anticipated expiration: 2032-03-24

Abstract

The application relates to an industrial test computer with multiple USB ports, which belongs to the technical field of USB test and comprises a case, a mainboard, a USB test circuit board and a connecting component, wherein the mainboard and the USB test circuit board are electrically connected through the connecting component; the case comprises an upper shell and a lower shell, and the upper shell is connected with the lower shell in a covering manner; the USB test circuit board is arranged on one side of the upper shell facing the lower shell, a plurality of connecting rods are further arranged on the upper shell, and one ends of the connecting rods, far away from the upper shell, penetrate through the USB test circuit board and are connected with the mainboard; the connecting assembly comprises a first connector, a second connector and a transmission plate, the first connector is connected with the mainboard in an inserting mode, the second connector is connected with the USB test circuit board in an inserting mode, and the transmission plate is connected with the first connector and the second connector. This application has the effect of improving mainboard and the complicated defect of USB test circuit board electric connection.

Description

Industrial test computer with multiple USB ports

Technical Field

The application relates to the technical field of USB testing, in particular to an industrial testing computer with multiple USB ports.

Background

At present, more and more electronic devices with USB (Universal Serial Bus) ports are available, and in order to ensure that the USB ports can work normally, the quality of the USB ports often needs to be tested during factory inspection and daily maintenance of the electronic devices, and whether the transmission data performance of the electronic devices is good or not needs to be checked. When testing an electronic device with a USB port, it is usually necessary to connect a testing apparatus through a Universal Serial Bus (USB).

In the related art, the testing device generally includes a motherboard and a USB testing circuit board, and the motherboard and the USB testing circuit board are electrically connected through a large number of wires, and the large number of wires can affect the installation and later maintenance of the motherboard and the USB testing circuit board.

In view of the above-mentioned related art, the inventor considers that the way of electrically connecting the motherboard and the USB test circuit board through a larger number of wires is complicated.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that the electrical connection between a mainboard and a USB test circuit board is complex, the application provides an industrial test computer with multiple USB ports.

The application provides an industrial test computer of many USB ports, adopts following technical scheme:

an industrial test computer with multiple USB ports comprises a case, a mainboard, a USB test circuit board and a connecting component, wherein the mainboard and the USB test circuit board are electrically connected through the connecting component; the case comprises an upper shell and a lower shell, and the upper shell and the lower shell are connected in a covering manner; the USB test circuit board is arranged on one side of the upper shell facing the lower shell, a plurality of connecting rods are further arranged on the upper shell, and one ends of the connecting rods, far away from the upper shell, penetrate through the USB test circuit board and are connected with the mainboard; the connecting assembly comprises a first connector, a second connector and a transmission plate, the first connector is connected with the mainboard in an inserting mode, the second connector is connected with the USB test circuit board in an inserting mode, and the transmission plate is connected with the first connector and the second connector.

By adopting the technical scheme, the mainboard and the USB test circuit board are positioned in the case, and the case can protect the mainboard and the USB test circuit board; the connecting rod realizes that the mainboard is connected on the upper shell, and the mainboard and the USB test circuit board are connected stably due to the existence of the connecting rod, and the mainboard and the USB test circuit board can be structurally well-arranged; the main board is inserted with a first connector, the USB test circuit board is inserted with a second connector, and the first connector and the second connector are connected through the transmission board, so that the main board and the USB test circuit board can be electrically connected through the transmission board; in addition, the connecting component can electrically connect the mainboard and the USB test circuit board, and meanwhile, the connecting component can also play a role of fixing and supporting the connection of the mainboard and the USB test circuit board; in the conventional technology, the electrical connection between the motherboard and the USB test circuit board is performed through a large number of wires, which may cause disorder of the wires, and the large number of and disorder wires may cause great interference to the installation or maintenance of the motherboard and the USB test circuit board; compare in the connected mode of traditional technology mainboard and USB test circuit board, the connected mode of this application technical scheme can reduce the use of electric wire in a large number, has improved the complicated defect of mainboard and USB test circuit board electric connection.

Optionally, all be provided with the joint piece on mainboard and the USB test circuit board, all be provided with joint portion on first connector and the second connector, joint portion is including installation piece, hinge bar and connecting plate, the installation piece sets up in the one end of first connector or second connector, the mounting groove has been seted up on the installation piece, the hinge bar sets up in the mounting groove, just the hinge bar rotates with the inner wall of mounting groove to be connected, the one end of connecting plate is connected in the one end that the connector was kept away from to the hinge bar, just the connecting plate is connected with the hinge bar is perpendicular, the joint mouth has still been seted up on the connecting plate, the tip of joint piece is located the joint mouth.

Through adopting above-mentioned technical scheme, the connector is pegged graft on mainboard or USB test circuit board after, the staff stirs the connecting plate, the connecting plate drives the hinge bar that is located the mounting groove and rotates to the direction of the joint piece that is close to mainboard or USB test circuit board, make the tip of joint piece be located the joint mouth of connecting plate, so that fix the connector at mainboard or USB test circuit board, reduced the risk that the connector drops from mainboard or USB test circuit board.

Optionally, the inner wall epirelief of mounting groove is equipped with the card strip, the one end that the hinge bar was kept away from to the connecting plate is provided with the joint plate, the joint plate is provided with the butt strip towards one side of hinge bar, the butt groove has been seted up on the butt strip, the tip and the butt of card strip, and be located the butt inslot.

Through adopting above-mentioned technical scheme, in the connector of installation, the staff dials the joint board, the joint board moves the butt strip and rotates, make the tip of the card strip of mounting groove inner wall be located the butt inslot, and with butt strip butt, the tip of card strip is through being located the butt inslot, can carry on spacingly to the butt strip, the pivoted resistance takes place for the increase hinge bar, when having reduced mainboard or USB test circuit board and having received the collision, the hinge bar takes place to rotate easily, make the tip of card strip break away from the condition of joint mouth.

Optionally, the outer side wall of the mounting block is further provided with a limiting table, the limiting table is provided with a limiting strip, and an inclined surface is formed at one end of the limiting table, which is far away from the first connector or the second connector; still be provided with the butt joint board on the connecting plate, and the butt joint board is located the both sides of installation piece, the one end and the spacing butt of butt joint board, the other end and inclined plane butt.

Through adopting above-mentioned technical scheme, the hinge bar is at the pivoted in-process, and the one end of butt board can with the spacing platform in the installation piece outside, the other end can with the inclined plane butt, spacing platform and inclined plane can carry on spacingly to the butt board, have reduced because the butt board rotates excessively, and influence the condition that the staff will connect the connector joint to mainboard or USB test circuit board.

Optionally, one side of the USB test circuit board facing the upper shell is provided with a plurality of USB sockets, and the upper shell is provided with a plurality of USB jacks matched with the plurality of USB sockets.

Through adopting above-mentioned technical scheme, and USB test circuit board is provided with the USB socket of a plurality of quantity, can realize the test to a plurality of USB electronic equipment simultaneously, and USB jack on the epitheca has then realized USB socket and external intercommunication.

Optionally, a signal interface and a USB interface are arranged on the main board, a power interface, a power switch and a USB switch are arranged on the USB test circuit board, and interface jacks matched with the signal interface, the USB interface, the power switch and the USB switch are formed in the side wall of the lower casing.

By adopting the technical scheme and the arrangement of the interface jacks, the connection between each interface and the external equipment is realized; the signal interface and the USB interface can be used for connecting external equipment, the power switch can control the USB test circuit board to be opened or closed, and the USB switch can control the USB sockets of the USB test circuit board to be opened or closed.

Optionally, a ventilation fan is arranged on the lower shell, and a plurality of heat dissipation holes corresponding to the ventilation fan are further formed in the bottom wall of the lower shell; and a plurality of vent holes are also formed in the side wall of the lower shell.

Through adopting above-mentioned technical scheme, USB test circuit board can produce great heat when testing USB electronic equipment, opens the ventilation fan, and the ventilation fan can discharge the heat of quick-witted incasement through the louvre through rotating to the temperature of quick-witted incasement has been reduced.

Optionally, one side that the epitheca was kept away from to the inferior valve diapire is provided with the butt post of a plurality of quantity, the one end and the horizontal plane butt of inferior valve are kept away from to the butt post.

Through adopting above-mentioned technical scheme, the setting of butt post for certain space has between inferior valve and the horizontal plane, so that the heat dissipation.

Optionally, a heat dissipation fan is disposed on one side of the main board facing the USB test circuit board, heat dissipation fins are disposed around the heat dissipation fan, and a plurality of air vents are further disposed on the side wall of the lower case.

Through adopting above-mentioned technical scheme, the heat that mainboard or USB test circuit board produced has been absorbed to the fin, and radiator fan blows the heat of fin and discharges away through the air vent, in time for mainboard or USB test circuit board heat dissipation cooling.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the technical scheme of the application, the connecting component can electrically connect the mainboard with the USB test circuit board, and meanwhile, the connecting component can also play a role of fixing and supporting the connection of the mainboard and the USB test circuit board; the connection mode of the mainboard and the USB test circuit board can greatly reduce the use of electric wires, and the defect of complex electrical connection between the mainboard and the USB test circuit board is overcome;

2. the end part of the clamping sheet is positioned in the clamping opening of the connecting plate so as to fix the first connector or the second connector on the mainboard or the USB test circuit board, and the risk that the first connector or the second connector falls off from the mainboard or the USB test circuit board is reduced;

the USB test circuit board is provided with a plurality of USB sockets, so that a plurality of USB electronic devices can be tested simultaneously.

Drawings

Fig. 1 is a schematic diagram of an overall structure of an industrial test computer with multiple USB ports according to an embodiment of the present invention.

FIG. 2 is an exploded view of an industrial test computer with multiple USB ports according to an embodiment of the present application.

Fig. 3 is a schematic overall structure diagram of a connection component of an industrial test computer with multiple USB ports according to an embodiment of the present application.

FIG. 4 is an exploded view of a connection module of an industrial test computer with multiple USB ports according to an embodiment of the present application.

Fig. 5 is a bottom view of fig. 1.

Description of reference numerals: 1. a main board; 11. a golden finger; 12. a clip sheet; 13. a signal interface; 14. a USB interface; 15. a heat-dissipating fan; 16. a heat sink; 17. a test switch; 2. a USB test circuit board; 21. a USB socket; 22. a power interface; 23. a power switch; 24. a USB switch; 25. a general indicator light; 26. a sub indicator light; 3. a chassis; 31. an upper shell; 311. a USB jack; 312. a connecting rod; 32. a lower case; 321. an interface jack; 322. a ventilating fan; 323. heat dissipation holes; 324. a butting post; 325. a vent hole; 4. a connecting assembly; 41. a first connector; 42. a second connector; 43. a transmission plate; 44. a clamping part; 441. mounting blocks; 4411. mounting grooves; 4412. clamping the strip; 4413. a limiting table; 44131. a limiting strip; 44132. a bevel; 442. a hinged lever; 443. a connecting plate; 4431. a card interface; 4432. a butt joint plate; 444. a clamping plate; 4441. an abutment bar; 4442. a butt joint groove; 4443. and (4) anti-skid lines.

Detailed Description

The present application is described in further detail below with reference to the attached drawing figures.

The embodiment of the application discloses an industrial test computer with multiple USB ports. Referring to fig. 1 and 2, the industrial test computer with multiple USB ports includes a main board 1, a USB test circuit board 2, a connecting assembly 4 and a case 3, wherein the main board 1 and the USB test circuit board 2 are electrically connected through the connecting assembly 4, and the main board 1 and the USB test circuit board 2 are both disposed in the case 3, and the case 3 can provide a mounting and protection basis for internal components.

Referring to fig. 2 and 3, the motherboard 1 and the USB test circuit board 2 both have a gold finger 11 thereon, and the motherboard 1 and the USB test circuit board 2 are further provided with a clip 12 at a position close to the gold finger 11. The connecting assembly 4 includes a first connector 41, a second connector 42 and a transmission board 43, the first connector 41 is plugged with the gold finger 11 of the motherboard 1, the second connector 42 is plugged with the gold finger 11 of the USB test circuit board 2, and the transmission board 43 is connected with both the first connector 41 and the second connector 42. One end of each of the first connector 41 and the second connector 42 is provided with a clamping portion 44, and the clamping portion 44 is connected with the clamping pieces 12 on the main board 1 and the USB test circuit board 2 in a clamping manner. Card with a detachable cover

Referring to fig. 3 and 4, the clamping portion 44 includes a mounting block 441, a hinge rod 442 and a connecting plate 443, the mounting block 441 is integrally formed at one end of the connector, a mounting groove 4411 is formed on the mounting block 441, and the forming direction of the mounting groove 4411 is identical to the length direction of the first connector 41 and the second connector 42. The hinge rod 442 is hinged to an inner wall of the mounting groove 4411, and the hinge rod 442 can rotate relative to the mounting block 441. The connection plate 443 is integrally connected to an end of the hinge rod 442 remote from the first connector 41 or the second connector 42, and the connection plate 443 is disposed perpendicular to the hinge rod 442. One end integrated into one piece that hinge rod 442 was kept away from to connecting plate 443 is connected with joint plate 444, and joint plate 444 has butt strip 4441 towards one side integrated into one piece of mounting groove 4411, has seted up butt groove 4442 on the butt strip 4441, and still integrated into one piece is provided with card strip 4412 on the inner wall of mounting groove 4411, and the tip of card strip 4412 is located butt groove 4442, and the tip of card strip 4412 still with butt strip 4441 butt. The side of the clamping plate 444 away from the connecting plate 443 is further provided with anti-slip threads 4443 to increase the friction force between the fingers of the worker and the clamping plate 444.

The connecting plate 443 is also integrally formed with an abutting plate 4432, and the abutting plates 4432 are located on both sides of the mounting block 441. The two sides of the mounting block 441 are further integrally formed with a limiting table 4413, and one end of the limiting table 4413 close to the first connector 41 or the second connector 42 is integrally formed with a limiting strip 44131, and one side of the limiting strip 44131 far from the limiting table 4413 is abutted against one end of the abutting plate 4432. An inclined surface 44132 is formed at one end of the limiting table 4413, which is far away from the first connector 41 or the second connector 42, and the inclined surface 44132 is abutted against the other end of the abutting plate 4432, so that the condition that the hinge rod 442 rotates excessively is reduced.

Referring to fig. 2 and 3, a card interface 4431 is formed on the connecting plate 443, and an end portion of the card sheet 12 is located in the card interface 4431, so that the card sheet 12 is clamped with the card interface 4431. The card connecting plate 444 is further provided with an abdicating channel so that the card connecting piece 12 enters the mounting groove 4411 through the abdicating channel, thereby realizing that the end part of the card connecting piece 12 is located in the card interface 4431.

Referring to fig. 1 and 2, the cabinet 3 includes an upper case 31 and a lower case 32, and the upper case 31 and the lower case 32 are covered, and the upper case 31 and the lower case 32 are coupled by screws. The USB test circuit board 2 is disposed on one side of the upper case 31 facing the lower case 32 through screws, and the USB test circuit board 2 is disposed on one side of the upper case 31 facing the lower case 21 and has a plurality of USB sockets 21, and the upper case 31 has USB sockets 311 matching with the USB sockets 21, in this embodiment, the USB sockets 21 are arranged in a matrix form on the USB test circuit board 2 and are adapted to the USB sockets 311 on the upper case 31. The adopted USB sockets 21 are 4 groups, and each group has 8 USB sockets 21.

USB test circuit board 2 is provided with total pilot lamp 25 and sub-pilot lamp 26 towards one side of face-up shell 31, is provided with test switch 17 on the mainboard 1, and test switch 17 passes through electric wire and mainboard 1 electric connection. The total indicator light 25 is located the tip of USB test circuit board 2, and sub-indicator light 26 is adjacent to be set up in one side of USB socket 21, and every USB socket 21 corresponds 1 sub-indicator light 26 of matching, and sub-indicator light 26's light can see through USB jack 311 and disperse away. In this embodiment, the total indicator light 25 that adopts is two, and each total indicator light 25 can correspond two sets of USB socket 21, and when total indicator light 25 did not light, these two sets of USB socket 21 all broke down, and when sub-indicator light 26 did not light, its corresponding USB socket 21 broke down to in the discernment trouble USB socket 21, improve the convenience of use and maintenance. Still be provided with test switch 17 on the mainboard 1, test switch 17 passes through electric wire and mainboard 1 electric connection, has seted up the mounting hole on the epitheca 31, and test switch 17 is located the mounting hole, and test switch 17 mainly used controls USB test circuit board 2's use.

One end of the motherboard 1 is provided with a signal interface 13 and a USB interface 14 in parallel, and in this embodiment, the number of the adopted USB interfaces 14 is two. The signal interface 13 is used for connecting a computer with an external display to be used in a single machine or a network, the signal interface 13 is one or more of a VGA interface, a DVI interface and an HDMI interface, in the embodiment, the signal interface 13 is an HDMI and RJ45 interface, and the USB interface 14 is only connected with the computer mainboard 1 and used by the computer mainboard 1. The USB test circuit board 2 is provided with a power interface 22, a power switch 23, and a USB switch in parallel at one end close to the signal interface 13 and the USB interface 14, where the power interface 22 is a DV interface with a voltage of 12V in this embodiment. The power switch 23 may control the activation or closing of the entire USB test circuit board 2, and the USB switch may control the activation or closing of the respective USB sockets 21 on the USB test circuit board 2. The lower shell 32 is provided with a plurality of interface jacks 321, and each interface jack 321 is matched with the signal interface 13, the USB interface 14, the power interface 22, the power switch 23 and the USB switch.

Still integrated into one piece has the connecting rod 312 of a plurality of quantity on the epitheca 31, and the quantity of the connecting rod 312 that this embodiment adopted is three, and the one end that the epitheca 31 was kept away from to connecting rod 312 passes USB test circuit board 2 and mainboard 1 screwed connection, and the length of connecting rod 312 is less than the height of epitheca 31 lateral wall. In this embodiment, the installation of mainboard 1 has been realized to the setting of connecting rod 312, and the setting of connecting rod 312 length in addition for have the space between mainboard 1 and the USB test circuit board 2, so that the heat dissipation. The side of the main board 1 facing the USB circuit test board is provided with a heat dissipation fan 15 and a heat dissipation fin 16 by screws, and the heat dissipation fin 16 is disposed around the heat dissipation fan 15. The sidewall of the lower case 32 near the interface jack 321 is further provided with a plurality of vent holes 325, and the heat dissipation fan 15 can blow heat and discharge the heat through the vent holes 325.

Referring to fig. 2 and 5, a ventilation fan 322 is further disposed on one side of the upper casing 31 above the lower casing 32 through a screw, and a plurality of heat dissipation holes 323 are further formed in the bottom wall of the lower casing 32 at positions corresponding to the ventilation fan 322, in this embodiment, the heat dissipation holes 323 are semi-annular, and the plurality of heat dissipation holes 323 form a circular heat dissipation area. One side of the lower case 32, which is far away from the upper case 31, is provided with a plurality of abutment columns 324 through screws, and the number of the abutment columns 324 adopted in this embodiment is four, and the abutment columns are located around the lower case 32. The abutting posts 324 are disposed such that when the lower case 32 is placed on a horizontal plane, the lower case 32 keeps a distance from the horizontal plane, so that the ventilation fan 322 discharges heat through the heat discharging holes 323.

The implementation principle of the industrial test computer with multiple USB ports in the embodiment of the application is as follows: the circuit board with multiple USB ports is integrated with a computer host, and the case 3 provides a large-area USB port splicing top wall, so that simultaneous operation of multiple ports can be met, and the operation transmission efficiency is also improved; the mainboard 1 is inserted with the first connector 41, the USB test circuit board 2 is inserted with the second connector 42, and the first connector 41 and the second connector 42 are connected through the transmission plate 43, so that the mainboard 1 and the USB test circuit board 2 can be electrically connected through the transmission plate 43, and the connecting component 4 can also play a role of fixing and supporting the connection of the mainboard 1 and the USB test circuit board 2; the connection mode of the mainboard 1 and the USB test circuit board 2 can greatly reduce the use of electric wires, and the defect that the electrical connection between the mainboard 1 and the USB test circuit board 2 is complex is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An industrial test computer with multiple USB ports is characterized in that: the USB test device comprises a case (3), a mainboard (1), a USB test circuit board (2) and a connecting component (4), wherein the mainboard (1) and the USB test circuit board (2) are electrically connected through the connecting component (4); the case (3) comprises an upper shell (31) and a lower shell (32), and the upper shell (31) and the lower shell (32) are connected in a covering manner; the USB test circuit board (2) is arranged on one side, facing the lower shell (32), of the upper shell (31), a plurality of connecting rods (312) are further arranged on the upper shell (31), and one end, far away from the upper shell (31), of each connecting rod (312) penetrates through the USB test circuit board (2) to be connected with the mainboard (1); coupling assembling (4) include first connector (41), second connector (42) and transmission board (43), first connector (41) are pegged graft with mainboard (1), second connector (42) are pegged graft with USB test circuit board (2), transmission board (43) are all connected with first connector (41) and second connector (42).

2. The multi-USB port industrial test computer of claim 1, wherein: the mainboard (1) and the USB test circuit board (2) are both provided with a clamping sheet (12), the first connector (41) and the second connector (42) are both provided with clamping parts (44), the clamping part (44) comprises a mounting block (441), a hinge rod (442) and a connecting plate (443), the mounting block (441) is disposed at one end of the first connector (41) or the second connector (42), the mounting block (441) is provided with a mounting groove (4411), the hinge rod (442) is arranged in the mounting groove (4411), the hinge rod (442) is rotatably connected with the inner wall of the mounting groove (4411), one end of the connecting plate (443) is connected with one end of the hinge rod (442) far away from the connector, the connecting plate (443) is vertically connected with the hinge rod (442), a clamping interface (4431) is further formed in the connecting plate (443), and the end portion of the clamping sheet (12) is located in the clamping interface (4431).

3. The multi-USB port industrial test computer of claim 2, wherein: the inner wall epirelief of mounting groove (4411) is equipped with card strip (4412), the one end that articulated pole (442) was kept away from in connecting plate (443) is provided with joint board (444), joint board (444) are provided with butt strip (4441) towards one side of articulated pole (442), butt groove (4442) has been seted up on butt strip (4441), the tip and the butt strip (4441) butt of card strip (4412), and be located butt groove (4442).

4. The multi-USB port industrial test computer of claim 2, wherein: the outer side wall of the mounting block (441) is further provided with a limiting table (4413), a limiting strip (44131) is arranged on the limiting table (4413), and an inclined surface (44132) is formed at one end, far away from the first connector (41) or the second connector (42), of the limiting table (4413); the connecting plate (443) is further provided with abutting plates (4432), the abutting plates (4432) are located on two sides of the mounting block (441), one end of each abutting plate (4432) abuts against the limiting strip (44131), and the other end of each abutting plate (4432) abuts against the inclined surface (44132).

5. The multi-USB port industrial test computer of claim 1, wherein: USB test circuit board (2) are provided with USB socket (21) of a plurality of quantity towards one side of face casing (31), seted up USB jack (311) with USB socket (21) assorted of a plurality of quantity on upper casing (31).

6. The multi-USB port industrial test computer of claim 1, wherein: be provided with signal interface (13) and USB interface (14) on mainboard (1), be provided with power source (22), switch (23) and USB switch (24) on USB test circuit board (2), seted up on the lateral wall of inferior valve (32) with signal interface (13), USB interface (14), power source (22), switch (23) and USB switch (24) assorted interface jack (321).

7. The multi-USB port industrial test computer of claim 1, wherein: be provided with ventilating fan (322) on inferior valve (32), still set up louvre (323) with a plurality of quantities that ventilating fan (322) correspond on the diapire of inferior valve (32).

8. The multi-USB port industrial test computer of claim 1, wherein: one side that epitheca (31) were kept away from to inferior valve (32) diapire is provided with the butt post (324) of a plurality of quantity, the one end and the horizontal plane butt of inferior valve (32) are kept away from to butt post (324).

9. The multi-USB port industrial test computer of claim 1, wherein: one side of the mainboard (1) facing the USB test circuit board (2) is provided with a heat radiation fan (15), the periphery of the heat radiation fan (15) is provided with heat radiation fins (16), and the side wall of the lower shell (32) is also provided with a plurality of air vents (325).