A mobile negative pressure dust collecting device

Abstract

The present application is suitable for the technical field of printed circuit processing equipment, and provides a mobile negative pressure dust collecting equipment.The dust collecting equipment comprises a dust collecting box, a cover, a connecting piece and a negative pressure generator, the dust collecting box has a suction passage, a first opening and a second opening which are communicated with the suction passage;the cover is movably connected with the dust collecting box, part of the cover covers the first opening, and the cover has a third opening which is communicated with the suction passage;the connecting piece is fixedly arranged at the third opening, the connecting piece has a receiving passage, an inlet of the receiving passage is used for connecting a dust outlet of an external equipment, an outlet is communicated with the suction passage, and the connecting piece and the cover can move in the first opening under the driving of the external equipment;the negative pressure generator is communicated with the suction passage through the second opening.The connecting piece can move along with the external equipment, collect materials generated in the cutting process of the external equipment, and adsorb the materials by cooperating the negative pressure generator with the cover, so that dust in the materials is prevented from flying.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of printed circuit processing equipment, and particularly relates to a mobile negative pressure dust collecting device. BACKGROUND

[0002] In the process of manufacturing printed circuit boards, when the CCL (copper clad laminate) in the circuit board needs to be cut, part of the cutting equipment moves along a predetermined route to cut the CCL.

[0003] In the cutting process of the CCL, the waste generated is discharged through the dust outlet of the cutting equipment. However, since the cutting equipment is moving while cutting, the dust outlet also moves while discharging the waste, so that the dust outlet cannot discharge the waste to the same position, and the dust in the waste flies everywhere in the discharging process, affecting the working environment. SUMMARY

[0004] The application aims to provide a mobile negative pressure dust collecting device to solve the above technical problems in the background art.

[0005] The application is implemented in the following manner:

[0006] The application provides a mobile negative pressure dust collecting device, which comprises a dust collecting box, a cover, a connecting piece and a negative pressure generator. The dust collecting box has a suction channel inside, and the side wall of the dust collecting box is provided with a first opening and a second opening which are in communication with the suction channel. The cover is movably connected with the dust collecting box, part of the cover covers the first opening, and the cover has a third opening which is in communication with the suction channel. The connecting piece is fixedly arranged at the third opening of the cover, and the connecting piece has a receiving channel. The inlet of the receiving channel is used to communicate with the dust outlet of an external equipment, the outlet of the receiving channel is in communication with the suction channel, and the connecting piece and the cover can move in the first opening under the driving of the external equipment. The negative pressure generator is in communication with the suction channel through the second opening.

[0007] The technical scheme provided by the application can achieve the following beneficial effects:

[0008] In the application, the connecting piece is connected between the dust outlet of the external device and the dust collection box, the connecting piece is movably connected with the dust collection box, so that the connecting piece can move with the external device in the first opening, the material output by the dust outlet is collected into the suction channel of the dust collection box, and the material is prevented from scattering everywhere. The cover piece covers the first opening arranged on the dust collection box, the first opening is blocked, the material is constrained in the suction channel, and the material in the suction channel is prevented from separating from the first opening. In addition, the negative pressure generator is arranged to communicate with the suction channel through the second opening, and the negative pressure generator is used for suction of the suction channel. On the one hand, the negative pressure generator can suck out the material in the suction channel, prevent the material in the suction channel from being accumulated too much to cause blockage, and affect the normal output of the material of the dust outlet. On the other hand, the negative pressure generator has an adsorption effect on the cover piece, so that the cover piece is tightly attached to the dust collection box, and there is no gap between the cover piece and the dust collection box for the material to pass through during the movement of the cover piece with the external device. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0010] Figure 1 is the overall structure schematic diagram of the dust collection equipment provided by some embodiments in the present application;

[0011] Figure 2 is the sectional view of the dust collection equipment provided by some embodiments in the present application;

[0012] Figure 3 is Figure 2 the detail view of A in

[0013] Figure 4 is Figure 2 the detail view of B in

[0014] Figure 5 is the cooperation schematic diagram of the dust collection box and the cover piece provided by some embodiments in the present application;

[0015] Figure 6 is the structure schematic diagram of the dust collection box provided by some embodiments in the present application;

[0016] Figure 7 is the structure schematic diagram of the cover piece provided by some embodiments in the present application;

[0017] Figure 8is a cross-sectional view of a dust collecting box provided by some embodiments of the present application;

[0018] Figure 9 is a schematic view of a connecting piece structure provided by some embodiments of the present application;

[0019] Figure 10 is a schematic view of a storage box structure provided by some embodiments of the present application.

[0020] In the figure: 100 - dust collecting box, 110 - suction passage, 120 - first opening, 130 - second opening, 140 - top wall, 150 - bottom wall, 160 - guide slope, 200 - cover piece, 210 - third opening, 300 - connecting piece, 310 - receiving passage, 311 - inlet, 312 - outlet, 320 - receiving end face, 400 - storage box, 410 - storage cavity, 420 - filter screen, 510 - first rotating wheel, 520 - second rotating wheel, 530 - pressing plate, 600 - rack. DETAILED DESCRIPTION

[0021] The following description provides many different embodiments, or examples, for implementing different features of the application. Specific examples are described in the following detail so as to provide a thorough understanding of the application. The description and drawings are not intended to limit the application to the described examples, but serve to provide examples to the application.

[0022] Embodiments of the present application provide a mobile negative pressure dust collecting device, which combines Figures 1 to 10 as shown, concentrates the material output by the dust outlet of the cutting machine for discharge, and avoids dust in the material from flying around during the discharge process.

[0023] Referring to Figure 3 and Figure 6 as shown, the dust collecting device includes a dust collecting box 100, a cover piece 200, a connecting piece 300, and a negative pressure generator. The dust collecting box 100 is internally provided with a suction passage 110, and the sidewall of the dust collecting box 100 is provided with a first opening 120 and a second opening 130 which communicate with the suction passage 110. Referring to Figure 4 and Figure 7 as shown, the cover piece 200 is movably connected with the dust collecting box 100 and can change the relative position with the dust collecting box 100. Part of the cover piece 200 covers the first opening 120, and the part of the cover piece 200 is further provided with a third opening 210 which communicates with the suction passage 110. In combination with Figure 3As shown, the connecting piece 300 is fixedly arranged at the third opening 210 of the cover piece 200, and the connecting piece 300 has a receiving channel 310, an inlet 311 of the receiving channel 310 is communicated with the dust outlet of the external equipment, and an outlet 312 of the receiving channel 310 is communicated with the suction channel 110. The connecting piece 300 communicates the dust outlet of the external equipment and the suction channel 110, and transports the material output by the dust outlet into the suction channel 110. Both the connecting piece 300 and the cover piece 200 can be driven by the external equipment to move in the first opening 120. The negative pressure generator is communicated with the suction channel 110 through the second opening 130.

[0024] It can be understood that the external equipment is a cutting equipment, and the cutting equipment moves with the change of the cutting position when cutting. The dust outlet of the cutting equipment also moves with the change of the cutting position. The dust outlet is connected with the connecting piece 300, and the connecting piece 300 is provided with the receiving channel 310 to receive the material output by the dust outlet. The other end of the receiving channel 310 is communicated with the suction channel 110, so that the material output by the dust outlet can be transported into the suction channel 110 for processing. Since the connecting piece 300 is fixed to the cover piece 200, and the cover piece 200 is movably arranged in the dust collection box 100, when the external equipment changes due to the change of the cutting position, the connecting piece 300 moves, the cover piece 200 changes the relative position with the dust collection box 100 to follow the movement of the connecting piece 300, so as to adapt to the position of the connecting piece 300, so that the connecting piece 300 always moves in the first opening 120 and is communicated with the suction channel 110, and the material output by the dust outlet can be concentrated and transported into the suction channel 110 for processing, so as to avoid the scattered situation of the material output by the dust outlet. The material is the material cut by the cutting machine, and generally the cut material cannot be used again, so it can also be called waste material.

[0025] The cover piece 200 covers the first opening 120, and at the same time adapts to the change of the position of the connecting piece 300, the cover piece 200 seals the first opening 120 to confine the material in the suction channel 110, so as to avoid the flying dust in the material overflowing through the first opening 120 and affecting the working environment.

[0026] The negative pressure generator is started to suck the suction channel 110. In the process of suction, the material in the suction channel 110 is discharged to the same position through the second opening 130, which facilitates subsequent processing of the material. The negative pressure generator timely sucks the material in the suction channel 110 to ensure the smoothness of the suction channel 110 and avoid the material from blocking the suction channel 110, which causes the material output from the dust outlet to be unable to enter the suction channel 110. At the same time, after the negative pressure generator is started, the suction channel 110 is in a negative pressure state, and the cover 200 covering the first opening 120 will be tightly attached to the surface of the dust collecting box 100 under the action of air pressure, so as to avoid the gap between the surface of the dust collecting box 100 and the cover 200, which causes the dust to escape.

[0027] In some embodiments of the present application, the cover 200 is used in cooperation with the negative pressure generator. When the connecting piece 300 is movably connected with the dust collecting box 100, the cover 200 can be tightly attached to the surface of the dust collecting box 100 under the action of the negative pressure generator to seal the first opening 120, so as to prevent the material from being output from the suction channel 110 through the opening other than the second opening 130, and ensure the sealing of the suction channel 110.

[0028] In some embodiments of the present application, in order to facilitate the material to be smoothly output from the dust outlet to the suction channel 110, the suction channel 110 is installed below the dust outlet so that the material can fall into the suction channel 110 when falling under the action of gravity. In combination with Figure 6 As shown in FIG. 1, the first opening 120 is located at the top wall 140 of the dust collecting box 100 and extends along the length direction of the suction channel 110. The top wall 140 of the dust collecting box 100 refers to the side wall of the dust collecting box 100 which is located at a higher position in the direction of gravity in the use environment. In specific implementation, the suction channel 110 has a strip-shaped structure to facilitate the negative pressure generator to suck the material. When installing the dust collecting device, it is necessary to note that the length direction of the suction channel 110 needs to be the same as the moving direction when cutting the external equipment. In this layout, the connecting piece 300 will not be hindered when moving in the first opening 120. The material output from the dust outlet can be distributed in the same straight line after passing through the receiving channel 310 and the suction channel 110, which facilitates the negative pressure generator to adsorb.

[0029] In order to improve the adsorption efficiency of the negative pressure generator, in combination with Figure 2 and Figure 6As shown, the bottom wall 150 of the dust collecting box 100 is provided with a guide slope 160, and the second opening 130 is located at the lower end of the two ends of the guide slope 160. The bottom wall 150 of the dust collecting box 100 refers to the side wall of the dust collecting box 100 that is located at the lower position in the direction of gravity in the use environment. The two ends of the guide slope 160 refer to the two ends of the guide slope 160 in the length direction of the suction channel 110. The guide slope 160 is inclined towards the second opening 130, so that the material in the suction channel 110 has a tendency to move towards the second opening 130, thereby improving the suction efficiency of the negative pressure generator. The guide slope 160 can be only one, and the guide slope 160 can also be provided as two, the lower ends of the two guide slopes 160 are oppositely arranged, and the second opening 130 is located at the joint of the lower ends of the two guide slopes 160.

[0030] In some optional embodiments, the end of the connecting piece 300 away from the dust outlet can be directly fixed to the cover 200, and the material in the receiving channel 310 directly falls into the suction channel 110.

[0031] In another optional embodiment, the second opening 130 is distributed at the end of the first opening 120, and the moving direction of all the materials in the suction channel 110 under the action of the negative pressure generator is the same, that is, the bottom wall 150 is provided with only one guide slope 160. Figure 3 and Figure 9 As shown, the end of the connecting piece 300 away from the dust outlet can pass through the third opening 210 and be located in the suction channel 110, and the discharge port 312 of the receiving channel 310 is located at the circumferential side wall of the connecting piece 300 close to the second opening 130. Due to the action of gravity, the material output from the dust outlet has a certain speed when passing through the discharge port 312. Since the discharge port 312 is arranged at the axial side wall of the connecting piece 300 close to the second opening 130, after the material is output from the discharge port 312, it will move a certain distance towards the second opening 130, thereby shortening the distance between the material and the second opening 130 and improving the suction efficiency of the negative pressure generator. Moreover, since the bottom wall 150 of the dust collecting box 100 is provided with the guide slope 160, the guide slope 160 cooperates with the material having a certain speed to further increase the distance of the material moving towards the second opening 130, thereby further shortening the distance between the material and the second opening 130 and improving the suction efficiency of the negative pressure generator. It can be understood that part of the connecting piece 300 passes through the third opening 210, and the circumference of the connecting piece 300 can be understood as the circumference of the third opening 210.

[0032] In some embodiments of the present application, the end face of the connecting piece 300 in the suction channel 110 is a receiving end face 320, which is used to receive the material entering from the inlet 311. The material is output from the dust outlet and enters the receiving channel 310, and then falls on the receiving end face 320 under the action of gravity. The receiving end face 320 is arranged in connection with the outlet 312. As shown in Figure 3 and Figure 9 The material falling on the receiving end face 320 directly enters the suction channel 110 through the outlet 312. And / or, the receiving end face 320 is arranged to be inclined relative to the top wall 140, and the gap between the receiving end face 320 and the top wall 140 gradually increases in the direction of the connecting piece 300 to the second opening 130 on the moving path of the connecting piece 300. After the material falls on the receiving end face 320, it can continue to slide along the inclined receiving end face 320 until it falls into the suction channel 110 through the outlet 312. The sliding speed of the material is increased, and the distance between the material falling on the guide slope 160 and the second opening 130 is further shortened, and the suction efficiency of the negative pressure generator is improved.

[0033] In addition, the inclined receiving end face 320 cooperates with the outlet 312 to disperse the stacked material, which is more convenient for the negative pressure generator to adsorb. After the stacked material falls on the receiving end face 320, it will be impacted, and under the impact, the stacked material can be partially dispersed and fall into the guide slope 160 from the outlet 312. Since the bottom wall 150 of the dust collection box 100 is the guide slope 160, it has a certain inclination, and there is a certain height gap between the outlet 312 and the guide slope 160 during the movement of the connecting piece 300 in the first opening 120. Therefore, the stacked material will be impacted again after falling on the guide slope 160, and under the impact, it will be further dispersed. In addition, the time for the preliminarily dispersed material to slide out of the outlet 312 is inconsistent, and during the process of passing through the height gap, the gap between the components in the stacked material can be further increased under the action of gravity, enhancing the dispersion effect.

[0034] In combination with Figure 3As shown, in some embodiments of the present application, the included angle between the guide slope 160 and the top wall 140 is a first included angle, and the included angle between the receiving end surface 320 and the top wall 140 is a second included angle, and the first included angle is smaller than the second included angle. The inclination degree of the receiving end surface 320 is greater than the inclination degree of the guide slope 160, so as to avoid the accumulation of the material on the receiving end surface 320. Although the inclination degree of the guide slope 160 is low, the suction channel 110 also has a negative pressure generator to suck the material, so there is no need to worry about the accumulation of the material in the suction channel 110. On the receiving end surface 320, although the negative pressure generator can have a certain suction effect on the material through the discharge port 312, the discharge port 312 is narrow, the material is more, and the effect of the negative pressure generator is not obvious, therefore, the inclination degree of the receiving end surface 320 needs to be high to avoid the accumulation of the material.

[0035] In some embodiments of the present application, referring to Figure 8 As shown, the width of the suction channel 110 gradually decreases along the direction from the top wall 140 to the bottom wall 150 of the dust collection box 100. The gradually decreasing width can preliminarily concentrate the material, facilitating the adsorption of the negative pressure generator. The guide slope 160 provided on the bottom wall 150 of the dust collection box 100 can be formed by the protrusion of the bottom wall 150 of the dust collection box 100, and the width change of the suction channel 110 can also be formed by a plate-shaped structure provided inside the dust collection box 100, in combination with Figure 8 As shown, the space inside the dust collection box 100 is limited by the plate-shaped structure, so that the width of the suction channel 110 gradually decreases, and the bottom wall 150 of the dust collection box 100 has the guide slope 160 provided in an inclined manner.

[0036] In combination with Figure 6 As shown, along the moving direction of the connecting piece 300, the length of the dust collection box 100 is greater than the length of the first opening 120. Avoiding the case that the first opening 120 penetrates through the dust collection box 100, the moving range of the connecting piece 300 is also limited, avoiding the case that the connecting piece 300 is too close to the end of the dust collection box 100, causing the material to be distributed in the corner of the end of the dust collection box 100, and unable to be adsorbed by the negative pressure generator. In addition, since the discharge port 312 is provided on the side wall of the connecting piece 300 close to the second opening 130, the distance between the discharge port 312 and the end of the dust collection box 100 away from the second opening 130 is as large as possible, and the speed direction of the material output from the discharge port 312 is toward the second opening 130, which can further avoid the accumulation of the material in the corner of the end of the dust collection box 100 away from the second opening 130.

[0037] In some embodiments of the present application, the dust collection device further comprises a storage box 400, in combination with Figure 1 , Figure 2 and Figure 10As shown, the storage box 400 is installed at the second opening 130. The storage box 400 has a storage cavity 410 for collecting the material adsorbed by the negative pressure generator, the inlet of the storage cavity 410 is communicated with the second opening 130, and the outlet of the storage cavity 410 is communicated with the negative pressure generator. A filter screen 420 is further installed in the storage cavity 410, which divides the storage cavity 410 into two parts, one of which is communicated with the second opening 130, and the other is communicated with the negative pressure generator. After the negative pressure generator is started, the material is adsorbed into the storage cavity 410 of the storage box 400, wherein the large pieces of material are blocked by the filter screen 420 and located in the storage cavity 410 between the filter screen 420 and the second opening 130, and the fine material such as dust can pass through the filter screen 420 and then pass through the filter screen 420 and be adsorbed by the negative pressure generator and finally be discharged. The material left in the storage cavity 410 is large in volume and does not contain dust and other substances, so the storage cavity 410 can be directly opened to pour the material, and there is no need to worry about dust during the pouring process. A drawer structure can be provided in the storage box 400 to facilitate pouring of the material.

[0038] In some embodiments of the present application, the cover 200 can be directly selected as a plate-shaped structure, which is arranged at the first opening 120 and moves with the movement of the connecting member 300. However, in this structure, the dust collection device needs to occupy more working space and is not convenient to use. In some other embodiments of the present application, the cover 200 is provided as a belt structure. For example, the dust collection device further comprises a first rotating wheel 510 and a second rotating wheel 520 arranged along the movement direction of the connecting member 300, and the first rotating wheel 510 and the second rotating wheel 520 are respectively located on both sides of the dust collection box 100; the cover 200 is a ring-shaped structure, and the cover 200 is sleeved outside the first rotating wheel 510 and the second rotating wheel 520, and the dust collection box 100 is located in the ring-shaped cavity of the cover 200. When the cover 200 is moved by the connecting member 300, the first rotating wheel 510 and the second rotating wheel 520 are driven to rotate outside the dust collection box 100 to realize the movable connection with the dust collection box 100. In actual implementation, the first rotating wheel 510 and the second rotating wheel 520 can be respectively arranged on the corresponding racks 600. Figure 1 and Figure 2 As shown, racks 600 are arranged at both ends of the dust collection box 100, and the first rotating wheel 510 and the second rotating wheel 520 are respectively installed on the corresponding racks 600.

[0039] To ensure that the cover 200 can be smoothly moved along the surface of the dust collecting box 100, a plurality of pressing plates 530 are arranged on the surface of the dust collecting box 100, and the plurality of pressing plates 530 are respectively arranged on both sides of the dust collecting box 100 in the width direction. One part of the pressing plate 530 is connected with the dust collecting box 100, and the other part is located on the surface of the cover 200. The pressing plate 530 can limit the cover 200 in the width direction and in the height direction, so as to avoid the cover 200 from being separated from the dust collecting box 100, and to ensure that the cover 200 can be smoothly adsorbed on the surface of the dust collecting box 100 by the negative pressure generator. In the moving direction of the connecting piece 300, the two ends of the pressing plate 530 are bent away from the cover 200, so as to protect the cover 200 and avoid the end surface of the pressing plate 530 from damaging the cover 200. In some optional embodiments, a corresponding limiting structure is arranged on the outside of the bottom of the cover 200, so as to constrain the movement range of the cover 200.

[0040] In addition, to reduce the friction between the cover 200 and the surface of the dust collecting box 100, a smooth metal plate can be arranged between the cover 200 and the surface of the dust collecting box 100, so as to reduce the friction received by the cover 200 during movement. In addition, due to the arrangement of the metal plate, the requirement for the surface roughness of the dust collecting box 100 is low during manufacturing, and the manufacturing speed of the dust collecting box 100 can be increased, so as to improve the manufacturing efficiency of the overall dust collecting device.

[0041] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mobile negative pressure dust collecting apparatus, characterized by comprising: The dust collecting box (100) has a suction passage (110) inside, and the side wall of the dust collecting box (100) is provided with a first opening (120) and a second opening (130) in communication with the suction passage (110); The cover (200) is movably connected with the dust collecting box (100), part of the cover (200) covers the first opening (120), and the cover (200) has a third opening (210) in communication with the suction passage (110); The connecting piece (300) is fixedly arranged at the third opening (210) of the cover (200), the connecting piece (300) has a receiving passage (310), the inlet (311) of the receiving passage (310) is used for communicating with the dust outlet of an external device, the outlet (312) of the receiving passage (310) is in communication with the suction passage (110), and the connecting piece (300) and the cover (200) can be driven by the external device to move in the first opening (120); A negative pressure generator is in communication with the suction passage (110) through the second opening (130); The first opening (120) is located on the top wall (140) of the dust collecting box (100) and extends along the length direction of the suction passage (110); The bottom wall (150) of the dust collecting box (100) has a guide slope (160), and the second opening (130) is located at the low end of the two ends of the guide slope (160); The second opening (130) is distributed at the end of the first opening (120); Part of the connecting piece (300) passes through the third opening (210) and is located in the suction passage (110), and the outlet (312) is located on the circumferential side wall of the connecting piece (300) close to the second opening (130); The end face of the connecting piece (300) located in the suction passage (110) is a receiving end face (320), and the receiving end face (320) is used for receiving the material entering from the inlet (311); The receiving end face (320) is arranged in connection with the outlet (312); and / or, the receiving end face (320) is arranged to be inclined relative to the top wall (140), and on the moving path of the connecting piece (300), the gap between the receiving end face (320) and the top wall (140) gradually increases in the direction from the connecting piece (300) to the second opening (130); The included angle between the guide slope (160) and the top wall (140) is a first included angle, the included angle between the receiving end face (320) and the top wall (140) is a second included angle, and the first included angle is smaller than the second included angle.

2. The mobile negative pressure dust collecting equipment according to claim 1, wherein ​ The width of the suction passage (110) gradually decreases from the top wall (140) of the dust collecting box (100) to the bottom wall (150) of the dust collecting box (100).

3. The mobile negative pressure dust collecting equipment according to claim 1, characterized in that, The length of the dust collecting box (100) is greater than the length of the first opening (120) along the moving direction of the connecting member (300).

4. The mobile negative pressure dust collecting equipment according to claim 1, characterized in that, The dust collecting equipment further comprises a storage tank (400) installed on the second opening (130), the storage tank (400) has a storage cavity (410), the inlet of the storage cavity (410) is communicated with the second opening (130), and the outlet of the storage cavity (410) is connected with the negative pressure generator. The storage cavity (410) is further provided with a filter screen (420), the filter screen (420) divides the storage cavity (410) into two parts, one part of which is communicated with the second opening (130), and the other part is communicated with the negative pressure generator.

5. The mobile negative pressure dust collecting equipment according to claim 1, characterized in that, The dust collecting equipment further comprises a first rotating wheel (510) and a second rotating wheel (520) arranged along the moving direction of the connecting member (300), the first rotating wheel (510) and the second rotating wheel (520) are respectively located on both sides of the dust collecting box (100). The cover member (200) is a ring-shaped structure, the cover member (200) is sleeved outside the first rotating wheel (510) and the second rotating wheel (520) at the same time, and the dust collecting box (100) is located in the ring-shaped cavity of the cover member (200).

6. The mobile negative pressure dust collecting equipment according to claim 5, characterized in that, The dust collecting box (100) is connected with a plurality of pressing plates (530), the plurality of pressing plates (530) are distributed on both sides of the dust collecting box (100) in the width direction, one part of the pressing plate (530) is connected with the dust collecting box (100), and the other part is located on the surface of the cover member (200). Along the moving direction of the connecting member (300), both ends of the pressing plate (530) are bent away from the cover member (200).

Images