CN110548346A - Case automatically cleaning dust keeper - Google Patents

Abstract

The invention provides a self-cleaning and dust-proof device for the case, which effectively solves the problem that the heat dissipation structure of the key parts in the existing large-scale computer case is easy to accumulate dust, cannot be cleaned in time, affects the heat dissipation efficiency, has unreliable performance, is easy to be damaged, and needs to be cleaned. Incomplete problem; the technical solution is to include the chassis, which has a hole, a cylinder in the hole, a filter screen installed on the right end of the cylinder, an annular plate on the outside of the left end of the cylinder, and a first The fan has a rotating shaft on the left side of the first fan. The rotating shaft is connected to the central shaft on the first fan through the first clutch. There is a second fan on the rotating shaft. The second fan includes a rotating cylinder. Clutch connection; a circular plate is fixed inside the cylinder, and a vent hole is opened on the circular plate. There is a connecting shaft on one side of the vent hole, a through groove on the circular plate, a small friction wheel in the through groove, a cover plate on the connecting shaft, and a center A large friction wheel is fixed on the shaft.

Description

Self-cleaning dust-proof device for chassis

technical field

The invention relates to the technical field of computer dust prevention, in particular to a self-cleaning dust prevention device for a chassis.

Background technique

With the popularity of computers, especially various large-scale servers and large computers, relying on their excellent performance, they are widely used in various industries, providing human beings with more convenient and faster production and lifestyle. In order to ensure its extremely fast computing power and strong data processing speed, its chassis needs to have more efficient cooling capacity. Generally, the processor and storage of this large-scale computing system are placed in a constant temperature room to ensure heat dissipation efficiency. And in the local area where the heat is concentrated, a fan is used to assist heat dissipation. After the fan has been running for a period of time, dust usually accumulates on the outside of the filter screen first. As time goes by, the permeability of the filter screen becomes poor, and the dust will gradually be sucked into the chassis with the airflow, and then on the side of the motherboard and the air inlet, etc. Accumulated on the air duct, and then accumulated in the case, affecting the normal operation of the internal components of the case, causing heat dissipation problems for the central processing unit, affecting data processing capabilities, and serious equipment damage may occur. Therefore, cleaning the dust on the air inlet filter in time can effectively reduce the accumulation of dust in the chassis, prolong the cleaning cycle of the chassis, and greatly benefit the heat dissipation of the entire chassis.

In the prior art, when cleaning the air inlet of the computer, some special processors are used to control the forward rotation and reverse rotation of the fan, such as the patent document with the authorized announcement number CN202748727U, but it also has considerable defects. The forward rotation and reverse rotation of the computer are independently separated. When the rotation is reversed, the heat dissipation of the processor, motherboard, capacitors and storage components of the computer cannot keep up, and the temperature in a local area of the chassis rises rapidly. At this time, if the motor drives the fan to forcibly change the Wind direction, one is that the instantaneous load of the motor is too large, and the other is that the inertia of the fan can easily cause damage to parts, so it can only be used in small computers; the application publication number is CN 108856154 A. Two switches are set, which are easy to forget by manual control. Misoperation may also occur, which is unreliable, and then the fan is controlled to rotate forward and reverse according to the circuit. When cleaning the dust, the heat dissipation efficiency inside the chassis is extremely low, and the heat dissipation in some areas cannot keep up with the effect. The circuit itself needs a controller or processing If the program is wrong or the system is reset, the cleaning function cannot be realized. And in the above documents, the dust is cleaned purely by blowing, and the impurities stuck on the filter cannot be cleaned, and the cleaning effect is not good.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a self-cleaning and dust-proof device for the chassis, which effectively solves the problem that the heat dissipation structure of the key parts in the existing large-scale computer chassis is easy to accumulate dust and cannot be cleaned in time. Affect heat dissipation efficiency, unreliable performance, easy damage, and incomplete cleaning.

The technical solution is to include a chassis with a hole, a horizontal cylinder in the hole, a filter screen installed at the right end of the cylinder, and an annular plate coaxial with the left end of the cylinder. The chassis is fixed by a number of screws, and the first fan coaxial with it is installed in the cylinder. There is a rotating shaft coaxial with it on the left side of the first fan. The rotating shaft and the central shaft on the first fan are connected by the first clutch. When rotating at a low speed, the rotation of the rotating shaft can drive the central shaft on the first fan to rotate. There is a second fan on the rotating shaft. The second fan includes a rotating cylinder sleeved on the rotating shaft. The cylinder and the rotating shaft are connected by the second clutch. When the rotating shaft rotates at high speed, the rotation of the rotating shaft can drive the rotating cylinder to rotate through the second clutch; when the first fan and the second fan rotate in the same direction, the first fan and the second fan the opposite direction of the wind;

A circular plate is fixed inside the cylinder, the left end of the central axis runs through the circular plate, the circular plate is placed between the first clutch and the first fan, and there are a plurality of fan-shaped ventilation holes uniformly distributed around the circumference of the circular plate. There is a connecting shaft arranged radially along the circular plate on one side of the vent hole, and the connecting shaft and the side wall of the vent hole are hinged together by a torsion spring. Friction wheel, the axis of the small friction wheel is perpendicular to the axis of the central shaft, and there is a cover plate perpendicular to the circular plate on the connecting shaft. The rotation of the small friction wheel can drive the cover plate to rotate around the connecting shaft and block the air hole. There is a large friction wheel coaxial with it, and the rotation of the central shaft can drive a plurality of small friction wheels to rotate simultaneously through the large friction wheel.

The invention has an ingenious structure. Without affecting the normal heat dissipation of the chassis, it utilizes the speed change when the power element is started or shut down, and relies on mechanical characteristics to realize the timely cleaning of the air duct opening of the computer every time the machine is turned on and off. The performance is reliable and can be thoroughly Clean the filter screen to greatly extend the life of the chassis and internal components.

Description of drawings

Fig. 1 is a front sectional view of the present invention.

Fig. 2 is a left view of the present invention.

Fig. 3 is the right view of the present invention.

Fig. 4 is an overall schematic diagram of the present invention.

Fig. 5 is a structural diagram of some parts in the present invention.

Fig. 6 is a structural diagram of core parts in the present invention.

Fig. 7 is a schematic diagram of the connection of the second circular plate and the parts on it in the present invention.

Fig. 8 is a schematic diagram of the installation relationship between the second circular plate and the connecting shaft in the present invention.

Fig. 9 is a sectional view of the first clutch in the present invention (viewed from left to right).

Fig. 10 is a sectional view of the second clutch in the present invention (viewed from left to right).

Fig. 11 is a schematic diagram of the filter screen in the present invention.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Given by Fig. 1 to Fig. 11, the present invention comprises cabinet 1, has hole on the cabinet 1, and horizontal cylinder 2 is arranged in the hole, and filter screen 3 is installed on the right end of cylinder 2, and the outside of cylinder 2 left end is fixed with The annular plate 26 coaxial with it, the annular plate 26 and the chassis 1 are fixed by a plurality of screws, the first fan 4 coaxial with it is installed in the cylinder 2, and the rotating shaft 5 coaxial with it is arranged on the left side of the first fan 4, the rotating shaft 5 is connected with the central shaft 6 on the first fan 4 via the first clutch, when the rotating shaft 5 rotates at a low speed, the rotation of the rotating shaft 5 can drive the central shaft 6 on the first fan 4 to rotate, and there is a second fan 7 on the rotating shaft 5, The second fan 7 includes a rotary drum 8 sleeved on the rotating shaft 5, the fan blades in the second fan 7 are fixed on the rotating drum 8, and the rotating drum 8 and the rotating shaft 5 are connected through the second clutch. When the rotating shaft 5 rotates at a high speed, The rotation of the rotating shaft 5 can drive the drum 8 to rotate through the second clutch; when the first fan 4 and the second fan 7 rotate in the same direction, the wind direction of the first fan 4 and the second fan 7 are opposite;

The circular plate 9 is fixed inside the cylinder 2, the left end of the central shaft 6 runs through the circular plate 9, the circular plate 9 is placed between the first clutch and the first fan 4, and there are a plurality of fan-shaped and circular plates on the circular plate 9. Ventilation holes 10 evenly distributed on the circumference, one side of the ventilation hole 10 has a connecting shaft 11 radially arranged along the circular plate 9, and the connecting shaft 11 and the side wall of the venting hole 10 are hinged together through a torsion spring. The ventilation holes 10 are one-to-one corresponding through grooves, and there are small friction wheels 12 in the through grooves. The rotation of the wheel 12 can drive the cover plate 13 to rotate around the connecting shaft 11 and block the air hole 10. The central shaft 6 is fixed with a large friction wheel 15 coaxial with it. The rotation of the central shaft 6 can drive multiple Small friction wheel 12 rotates simultaneously.

In order to better make the filter screen 3 clean, the filter screen 3 is a cylindrical shell 16 with an opening to the left. The filter screen 3 is buckled on the right end of the cylinder 2. Spring; the central axis 6 right-hand end on the first fan 4 has disc 14, and there are a plurality of hemispherical protuberances that are evenly distributed around the circumference on the right end surface of disc 14, and there are a plurality of hemispherical protuberances corresponding to filter screen 3 Wedge block, disc 14 rotates through hemispherical protrusion to make filter screen 3 vibrate.

In order to reduce the resistance when starting, the through groove is located on the side of the air hole 10 close to the central axis 6, and the gap between the outer edge surface of the small friction wheel 12 and the side wall of the through groove is very small.

In order to realize the low-speed rotation of the rotating shaft 5, the rotation of the rotating shaft 5 can drive the central shaft 6 on the first fan 4 to rotate. The first clutch includes a housing 16 with an opening to the left, and there are multiple pits on the inner wall of the housing 16. , the cross section of the pit is wedge-shaped, the housing 16 is fixed to the central shaft 6 on the first fan 4, the housing 16 has a first cylindrical block 17, the first cylindrical block 17 is fixed to the rotating shaft 5, and the outer edge of the first cylindrical block 17 Have a plurality of notches 18 that are evenly distributed around the circumference and open outwards. There is a movable rod 19 in the notch 18. The middle part of the movable rod 19 is hinged with the side wall of the notch 18. The movable rod 19 is gradually away from the first one along the counterclockwise direction. Cylindrical block 17, movable rod 19 is placed in the pit along one end of counterclockwise direction, movable rod 19 has steel ball along one end of counterclockwise direction, first cylindrical block 17 drives shell through movable rod 19 when first cylindrical block 17 rotates at low speed Body 16 rotates, and when the first cylindrical piece 17 rotates at a high speed, the steel ball on the movable rod 19 makes the movable rod 19 rotate with the hinge and break away from the pit, and the cylindrical block breaks away from the housing 16.

In order to realize that when the rotation speed of the rotating shaft 5 reaches a certain value, the cylindrical block and the housing 16 are quickly disengaged, the side wall of the notch 18 has a blind hole that opens inward, and the blind hole is located on the outside of the steel ball. The bayonet pin that slides in the hole, a clip spring is connected between the bayonet pin and the bottom of the blind hole, the other end of the bayonet pin is spherical and extends out of the blind hole, when the first cylindrical block 17 rotates at high speed, the movable rod 19 first presses the bayonet pin Only after the blind hole can it be turned around the hinge point.

In order to realize the high-speed rotation of the rotating shaft 5, the rotation of the rotating shaft 5 can drive the rotating drum 8 to rotate through the second clutch. There is a second cylindrical block 20 on the rotating shaft 5, and the rotating drum 8 is sleeved on the second cylindrical block 20. The second cylindrical block On the outer surface of the block 20, there are a plurality of rectangular holes with outward openings. On the outside of the second cylindrical block 20, there are a plurality of arc-shaped plates 21 corresponding to the rectangular holes and uniformly distributed around the circumference. There are rectangular blocks inside the arc-shaped plate 21. 22. The rectangular block 22 is placed in the rectangular hole, and a tension spring is connected between the rectangular block 22 and the bottom of the rectangular hole. When the second cylindrical block 20 rotates and a plurality of arc-shaped plates 21 contact the drum 8, the second cylindrical block 20 drives rotating drum 8 to rotate together.

In order to realize that the rotating shaft 5 can actively rotate, the left end of the second fan 7 has a fixed plate 23, and there are a plurality of L-shaped rods 24 distributed around the fixed plate 23, and the other end of the L-shaped rod 24 is fixed with the annular plate 26. , the fixed plate 23 and a plurality of L-shaped plates form a bracket, the main body of the second fan 7 is fixed on the bracket, the rotating shaft 5 is connected with a motor 25, and the motor 25 is fixed on the fixed plate 23.

It should be noted that when the first fan 4 and the second fan 7 in the present invention rotate in the same direction, the first fan 4 can blow air to the right, but the second fan 7 can blow air to the left; 9 and the cover plate 13 are perpendicular to each other, the vent hole 10 is opened, and the air can circulate left and right in the cylinder 2; the cover plate 13 can completely cover the vent hole 10, and when the central shaft 6 rotates, the central shaft 6 is driven by the large friction wheel 15 A plurality of small friction wheels 12 rotate, and a plurality of small friction wheels 12 drive the cover plate 13 on it to rotate and close the air hole 10, and then because the cover plate 13 cannot continue to rotate, so the small friction wheels 12 also stop rotating, and the large friction wheel 15 starts to slip between the small friction wheel 12, and now the torsion spring is compressed, and the left and right sides of the cylinder 2 are not ventilated; And the area of the cover plate 13 is larger than the flow area of the air hole 10 .

When the present invention is in use, after the motor 25 is started, the rotating shaft 5 can drive the central shaft 6 of the first fan 4 to rotate through the first clutch at this time, while the second clutch is in an idle state, and the central shaft 6 rotates the large friction wheel 15 Drive a plurality of small friction wheels 12 to rotate, and a plurality of small friction wheels 12 drive the cover plate 13 on it to rotate and close the vent hole 10. When the cover plate 13 completely blocks the vent hole 10, the air in the cylinder 2 Can not circulate left and right, lest the two fans offset each other's air volume. At this time, the cover plate 13 cannot continue to rotate, and the small friction wheel 12 cannot continue to rotate. The big friction wheel 15 and the small friction wheel 12 start to slip, and the torsion spring is compressed. The central shaft 6 drives the disc 14 to rotate, and the hemispherical protrusions on the disc 14 withstand the multiple wedge-shaped blocks on the filter screen 3 to make the filter screen 3 vibrate. During the vibration process, the dust on the filter screen 3 falls off, and the center The shaft 6 also drives the first fan 4 to rotate, and when the first fan 4 rotates, the dust that falls off will be blown away quickly to the right; When the pin resists, the movable rod 19 is disengaged from the pit on the housing 16, the first clutch is idling, and then the first fan 4 gradually stops rotating. At the same time, the arc plate 21 on the second clutch gradually rotates under the centrifugal force. Close to and close to the drum 8 outward, the drum 8 gradually starts to rotate until the drum 8 and the shaft 5 rotate synchronously, at this time the cover plate 13 gradually returns to its original shape under the action of the torsion spring, the air hole 10 is opened, and the first cylinder 2. Left and right can be ventilated, and the second fan 7 draws the external cold air into the chassis 1 from right to left to cool the inside. In the above process, when the first fan 4 rotates, the second fan 7 starts to start, and before the first clutch is disengaged, the second fan 7 already has a considerable rotational speed, which can dissipate heat for components.

In the above process, at the beginning, the torsion spring on the connecting shaft 11 is compressed, and the cover plate 13 blocks the air hole 10, so when the first fan 4 rotates, the cylinder 2 is pressed by the circular plate 9 and the cover plate 13. The partition is left and right. The first fan 4 is responsible for cleaning the filter screen 3. The second fan 7 starts to rotate and gradually rotates synchronously with the rotating shaft 5, so that the air in the box circulates for heat dissipation. When the first clutch is idling, the cover plate 13 is restored to its original state, the ventilation hole 10 is opened, and the cold air is pumped into the box by the second fan 7 from right to left through the cylinder 2.

When the motor 25 stopped, the rotational speed of the rotating shaft 5 gradually decreased from high to low, the arc plate 21 in the second clutch gradually broke away from the rotating drum 8, the second fan 7 gradually stopped, and the movable rod 19 gradually returned to its original state under the action of the torsion spring, and One end of the movable rod 19 enters the pit again, and the disc 14 drives the casing 16 to rotate through the movable rod 19, and the rotation of the casing 16 drives the first fan 4 to rotate. At the same time, the cover plate 13 and the circular plate 9 seal the cylinder 2 In order to prevent the two fans from canceling out the air volume, the rotation of the disc 14 makes the filter screen 3 vibrate, and the first fan 4 blows the dust away from the filter screen 3 quickly, so that the filter screen 3 is clean.

For the convenience of air intake, there are many small holes on the cylinder in the shape of a screen, and there are hard fibers on the inner wall of the filter to form a brush. During the vibration of the filter, the brush can also move the cylinder Clean the outside surface.

When the circular plate 9 and the cover plate 13 block the cylinder 2, the air cannot circulate left and right in the cylinder 2, the first fan 4 is responsible for cleaning the filter screen 3, and the rotation of the second fan 7 makes the air in the cabinet 1 circulate and Take the heat to the left.

The outstanding advantages and remarkable progress of the present invention:

1. The dust on the case 1 generally stays on the air intake side of the filter screen 3 of the case 1, so blowing back from the inside to the outside is the best and most efficient way. In the present invention, two fans with opposite wind directions are adopted, and the first fan 4 can clean the dust on the filter screen 3 from the right inside to the outside when rotating at a low speed, so that the dust attached to the filter screen 3 is quickly separated. When the rotation speed of the output shaft reaches a certain value, the cylinder 2 can ventilate left and right, and at this time, the second fan 7 can rush the external cold air into the chassis 1 to realize heat dissipation and work separately.

2. In the present invention, from the start of the motor 25 to the driving of the second fan 7 by the rotating shaft 5, the normal heat dissipation in the cabinet 1 will go through three stages: first, the rotating shaft 5 rotates at a low speed. At this stage, the rotating shaft 5 drives the center through the first clutch. The shaft 6 rotates, and the first fan 4 cleans the filter screen 3 to the right. At this time, the circular plate 9 and the cover plate 13 block the cylinder 2; then the rotation speed of the rotating shaft 5 gradually increases, and the rotating shaft 5 drives the central shaft 6 to rotate through the first clutch. , and the rotating shaft 5 drives the rotating cylinder 8 to rotate at the same time, the rotating speed of the rotating cylinder 8 gradually approaches the rotating speed of the rotating shaft 5, and the second fan 7 blows air into the cabinet 1 to make the air flow in the cabinet 1 and dissipate heat in the cabinet 1. At this time, the circular plate 9 Block the cylinder 2 with the cover plate 13; finally, the rotation speed of the rotating shaft 5 is large enough, the first clutch idles, the first fan 4 does not rotate, the cylinder 2 is transparent, the second fan 7 rotates and draws in the external cold air Heat dissipation is carried out in the chassis 1 . When shutting down, the above-mentioned process is just the opposite, and finally restores to the original state. As mentioned above, without affecting the normal use, the filter screen 3 can be cleaned up every time the machine is turned on or off, effectively preventing dust from accumulating, and can be cleaned in time to prolong the cleaning and maintenance period of the chassis 1 .

3. For the two fans in the present invention, when the first fan 4 and the second fan 7 are rotating, the circular plate 9 and the cover plate 13 make the cylinder 2 blocked, which can effectively prevent the first fan 4 and the second fan from rotating. Fan 7 mutually influences wind speed and exhaust air volume, can prevent that second fan 7 weakens the cleaning efficiency of filter screen 3 to the right of first row fan, also can prevent first fan 4 from weakening the heat dissipation efficiency to second fan 7.

4. In the present invention, not only the back blowing method is adopted for heat dissipation, but also the vibration is combined, so that the dust on the filter screen 3 falls off quickly, and the dust can be cleaned more thoroughly and efficiently.

5. The present invention can prevent misoperation, let alone forget to clean up the operation, and has high reliability.

Claims (7)

1. A self-cleaning dustproof device of a machine case is characterized by comprising the machine case (1), a hole is formed in the machine case (1), a horizontal cylinder (2) is arranged in the hole, a filter screen (3) is installed at the right end of the cylinder (2), an annular plate (26) coaxial with the cylinder is fixed on the outer side of the left end of the cylinder (2), the annular plate (26) is fixed with the machine case (1) through a plurality of screws, a first fan (4) coaxial with the cylinder is installed in the cylinder (2), a rotating shaft (5) coaxial with the first fan is arranged on the left side of the first fan (4), the rotating shaft (5) is connected with a central shaft (6) on the first fan (4) through a first clutch, when the rotating shaft (5) rotates at a low speed, the rotating shaft (5) can drive the central shaft (6) on the first fan (4) to rotate, a second fan (7) is arranged on the rotating shaft (5), the second fan (7) comprises a rotating drum (8) sleeved on the, the fan blades in the second fan (7) are fixed on the rotary drum (8), the rotary drum (8) is connected with the rotary shaft (5) through a second clutch, and when the rotary shaft (5) rotates at a high speed, the rotary shaft (5) can rotate to drive the rotary drum (8) to rotate through the second clutch; when the first fan (4) and the second fan (7) rotate in the same direction, the wind directions of the first fan (4) and the second fan (7) are opposite;

A circular plate (9) is fixed in the cylinder (2), the left end of the central shaft (6) penetrates through the circular plate (9), the circular plate (9) is arranged between the first clutch and the first fan (4), a plurality of fan-shaped vent holes (10) uniformly distributed in the circumferential direction are formed in the circular plate (9), a connecting shaft (11) arranged along the circular plate (9) in the radial direction is arranged on one side of each vent hole (10), the connecting shaft (11) is hinged with the side wall of each vent hole (10) through a torsion spring, through grooves corresponding to the vent holes (10) one by one are formed in the circular plate (9), small friction wheels (12) are arranged in the through grooves, the axis of each small friction wheel (12) is perpendicular to the axis of the central shaft (6), a cover plate (13) perpendicular to the circular plate (9) is arranged on the connecting shaft (11), the small friction wheels (12) can drive the cover plate (13) to rotate around the connecting shaft (11) and seal the vent holes (10) through, and a large friction wheel, the rotation of the central shaft (6) can drive a plurality of small friction wheels (12) to rotate simultaneously through the large friction wheel (15).

2. A self-cleaning device of machine case as claimed in claim 2, wherein the filter screen (3) is a cylindrical shell (16) with left opening, the filter screen (3) is buckled at the right end of the cylinder (2), and a tension spring is connected between the annular plate (2) and the filter screen (3); center pin (6) right-hand member on first fan (4) has disc (14), has a plurality of hemispheric archs that are the circumference equipartition on disc (14) the right-hand member face, has a plurality of wedge blocks that correspond with the hemispheric arch on filter screen (3), and disc (14) rotate and enable filter screen (3) vibration through the hemispheric arch.

3. A self-cleaning and dust-proof device for machine case as claimed in claim 1, wherein said through slot is located at the side of the ventilation hole (10) near the central shaft (6), and the gap between the outer edge surface of the small friction wheel (12) and the side wall of the through slot is small.

4. The machine box self-cleaning dust-proof device of claim 1, characterized in that the first clutch comprises a shell (16) with a left opening, the inner side wall of the shell (16) is provided with a plurality of pits with wedge-shaped cross sections, the shell (16) is fixed with a central shaft (6) on the first fan (4), the shell (16) is internally provided with a first cylindrical block (17), the first cylindrical block (17) is fixed with the rotating shaft (5), the outer edge of the first cylindrical block (17) is provided with a plurality of notches (18) with uniform circumferential distribution and outward openings, the notches (18) are internally provided with movable rods (19), the middle parts of the movable rods (19) are hinged with the side walls of the notches (18), the movable rods (19) are gradually far away from the first cylindrical block (17) along the counterclockwise direction, one ends of the movable rods (19) along the counterclockwise direction are arranged in the pits, one ends of the movable rods (19) along the counterclockwise direction are provided with steel balls, when the first cylindrical block (17) rotates at a low speed, the first cylindrical block (17) drives the shell (16) to rotate through the movable rod (19), when the first cylindrical block (17) rotates at a high speed, the steel ball on the movable rod (19) enables the movable rod (19) to rotate at the hinged position and separate from the pit, and the cylindrical block separates from the shell (16).

5. A self-cleaning and dust-proof device for machine box as claimed in claim 1, wherein the side wall of the slot opening (18) is provided with a blind hole with an inward opening, the blind hole is located outside the steel ball, a bayonet lock capable of sliding along the blind hole is arranged in the blind hole, a pressure spring is connected between the bayonet lock and the bottom of the blind hole, the other end of the bayonet lock is spherical and extends out of the blind hole, when the first cylindrical block (17) rotates at high speed, the movable rod (19) firstly presses the bayonet lock into the blind hole and then rotates around the hinge point.

6. The machine box self-cleaning dust-proof device of claim 1, characterized in that the rotating shaft (5) is provided with a second cylindrical block (20), the rotating drum (8) is sleeved on the second cylindrical block (20), the outer circular surface of the second cylindrical block (20) is provided with a plurality of rectangular holes with outward openings, the outer side of the second cylindrical block (20) is provided with a plurality of arc-shaped plates (21) which are in one-to-one correspondence with the rectangular holes and are uniformly distributed in the circumference, the inner side of each arc-shaped plate (21) is provided with a rectangular block (22), each rectangular block (22) is arranged in each rectangular hole, a tension spring is connected between each rectangular block (22) and the bottom of each rectangular hole, and when the second cylindrical block (20) rotates and the plurality of arc-shaped plates (21) are in contact with the rotating drum (8), the second cylindrical block (20) drives the rotating drum (8).

7. The machine box self-cleaning dust-proof device of claim 1, characterized in that the left end of the second fan (7) is provided with a fixing plate (23), the fixing plate (23) is provided with a plurality of L-shaped rods (24) distributed annularly around, the other ends of the L-shaped rods (24) are fixed with an annular plate (26), the fixing plate (23) and the plurality of L-shaped plates form a support, the main body of the second fan (7) is fixed on the support, the rotating shaft (5) is connected with a motor (25), and the motor (25) is fixed on the fixing plate (23).