A dust-preventing mechanism for a dust collecting box of a sweeping machine

Abstract

The embodiment of the present invention discloses a dust anti-falling mechanism for a dust suction box of a sweeper, comprising a dust box movably connected to the sweeper body and a wind drum installed in the sweeper body, the dust box being provided with a dust inlet at one end close to the wind drum, and a blocking mechanism for closing the dust inlet is installed at a position corresponding to the inner wall of the dust box and the dust inlet, a tooth box with a right-angled trapezoidal structure in cross section is provided on the wind drum, and is used to push open the blocking mechanism and insert the dust inlet to guide dust into the dust box. The present invention can solve the problem of secondary dust falling due to poor sealing when the dust box is pulled out by adding a blocking mechanism with an automatic closing effect inside the dust box, that is, when the dust box is not used daily or is pulled out of the sweeper, the upper and lower blocking plates will be pushed by the spring, thereby blocking the dust suction port. At this time, even if the dust box is vibrated or shaken, the upper and lower blocking plates will not be easily affected, causing the dust in the box to fall out.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of sweeping machines, and particularly to a dust-preventing mechanism for a dust collection box of a sweeping machine. Background Art

[0002] A sweeping robot is a type of robot vacuum. In the near future, it will become an essential cleaning aid in every household, just like white goods. These products will evolve from basic intelligence to higher levels of intelligence, gradually replacing manual cleaning. They have many components, one of the most important being the dust collection box.

[0003] There are two types of dust box suction ports today: one is unobstructed, and the other is a barrier added inside the dust box. When the dust box is pulled out, the dust suction port is closed by the gravity of the barrier.

[0004] However, common dust collectors generally face the problem that their structure is relatively simple. When the dust collector is pulled out, the blocking structure at the dust suction port, such as the barrier piece that blocks the dust suction port by gravity, is relatively light. If the dust collector vibrates or shakes violently, the barrier piece can move up and down. At this time, once the dust collector is pulled out, the dust or waste accumulated at the dust suction port is very easy to fall off, thereby causing secondary pollution. Summary of the Invention

[0005] To this end, an embodiment of the present invention provides a dust anti-falling mechanism for the dust collection box of a sweeping machine to solve the problem that the blocking structure at the dust collection port in the prior art, such as the barrier plate that blocks the dust collection port by gravity, is relatively light in weight. If the dust collection box vibrates or shakes significantly, the barrier plate can move up and down. At this time, once the dust collection box is pulled out, the dust or waste accumulated at the dust collection port is very likely to fall off.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A dust-preventing mechanism for a dust box of a sweeping machine includes a dust box movably connected to a main body of the sweeping machine and a wind drum installed in the main body of the sweeping machine, wherein the dust box is provided with a dust inlet at one end close to the wind drum, and a blocking mechanism for closing the dust inlet is installed at a position on the inner wall of the dust box corresponding to the dust inlet, and a tooth box with a right-angled trapezoidal cross-section is provided on the wind drum for pushing open the blocking mechanism and inserting into the dust inlet to guide dust into the dust box;

[0008] The blocking mechanism includes a lower fixed plate connected to the inner wall of one end of the dust box close to the dust inlet, an upper fixed plate is connected to the side of the lower fixed plate away from the dust inlet, and a guide rail group is installed between the lower fixed plate and the upper fixed plate, an upper blocking piece and a lower blocking piece for closing the dust inlet are movably connected to the guide rail group, and a spring for resetting the upper blocking piece and the lower blocking piece is connected to the guide rail group.

[0009] As a preferred solution of the present invention, the upper blocking plate and the lower blocking plate are both installed with an inclined platform on the end surface close to the dust inlet for assisting the tooth box box to push the upper blocking plate and the lower blocking plate to slide, and the length of the inclined platform is equal to the length of the tooth box box.

[0010] As a preferred solution of the present invention, a sealing ring for assisting in sealing between the tooth box and the dust box is installed on the side wall of one end of the tooth box close to the wind cylinder.

[0011] As a preferred solution of the present invention, the tooth box box is provided with a stepped groove on the inner wall on one side close to the lower blocking piece, and a sealing piece is connected in the stepped groove, and the surface of the sealing piece at one end close to the dust inlet is provided with a pulling spring block whose end face is connected to the inner wall of the stepped groove, and the sealing piece is provided with a through column passing through the tooth box box to the outside at the end close to the dust inlet, and an adjusting piece connected to the through column is installed on the side wall of the tooth box box, and a slider groove is provided on the inner wall of the dust inlet, and a movable slider for pushing the adjusting piece to deflect the sealing piece and press it into the stepped groove is connected in the slider groove.

[0012] As a preferred solution of the present invention, a plurality of blocking platforms with a triangular cross-section are installed on the surface of the side of the sealing plate away from the stepped groove, and an anti-magnetic platform is installed on the other side of the sealing plate, and a card suction sleeve for sucking the anti-magnetic platform is installed on the inner wall of the stepped groove.

[0013] As a preferred solution of the present invention, a quick-connect platform group is installed on the surface of the side of the upper fixed plate away from the dust inlet, a connecting column is installed on the quick-connect platform group, a rotating sleeve is provided on the outer side of the connecting column, and a torsion spring is installed between the connecting column and the rotating sleeve, a push column group is installed on the side wall of the rotating sleeve close to the dust inlet, a hooking column is installed on the side wall of the push column group, a hook platform for hooking the hooking column is installed on the side wall of the upper fixed plate, and a rubber platform connected to the movable slider and used to push the hooking column is provided on the end of the hooking column close to the dust inlet.

[0014] As a preferred solution of the present invention, a limiting block with a triangular cross-section is installed on the outer wall of the other side of the rotating sleeve, and the push column group is composed of a plurality of push columns whose ends are connected to the rotating sleeve.

[0015] As a preferred solution of the present invention, the cross section of the tooth box is in a U-shaped structure, and the height of the tooth box is equal to the width of the dust inlet.

[0016] As a preferred solution of the present invention, the through column is composed of a driving column with a pentagonal cross section and cylinders installed at both ends of the driving column, and the cylinders are directly connected to the adjusting piece.

[0017] The embodiments of the present invention have the following advantages:

[0018] The present invention can solve the problem of dust falling out again due to loose sealing when the dust box is pulled out by adding a blocking mechanism with an automatic closing effect inside the dust box. That is, when the dust box is not in use or pulled out of the sweeper, the upper and lower blocking plates are pushed by the spring to block the dust suction port. At this time, even if the dust box is vibrated or shaken, the upper and lower blocking plates will not be easily affected, causing the dust in the box to fall out.

[0019] The present invention can also use the sealing piece to prevent the dust box from clogging the tooth box when a lot of dust debris accumulates. In its specific implementation, once the dust box is inserted into the sweeper, the sealing piece will be pushed by the movable slider so that the sealing piece is pressed into the stepped groove, so that dust can normally enter the dust box. Once the dust box is pulled out, the sealing piece will tilt under the action of the pulling spring block to seal the tooth box opening. At this time, the dust or waste debris remaining in the tooth box will be pushed into the dust box, so that subsequent operations will not be affected.

[0020] When the dust box is inserted into the sweeper, the movable slider will also push the connecting column, causing the push column group to tilt. When the waste debris is sucked into the dust box, it can act as a barrier, so that the accumulated waste debris will not get stuck at the dust inlet, thereby further avoiding the chance of dust or waste debris falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0023] Figure 1 A three-dimensional diagram of a dust box according to an embodiment of the present invention;

[0024] Figure 2 An exploded view of a blocking mechanism according to an embodiment of the present invention;

[0025] Figure 3This is a schematic diagram of the structure of the embodiment of the present invention when the dust box is not inserted into the sweeping machine body;

[0026] Figure 4 This is a schematic diagram of the structure of the dust box when it is inserted into the sweeper body according to an embodiment of the present invention;

[0027] Figure 5 This is a structural diagram of the toothbrush box when the toothbrush box is not inserted into the dust inlet according to the embodiment of the present invention;

[0028] Figure 6 This is a structural diagram of the toothbrush box when it is inserted into the dust inlet according to an embodiment of the present invention;

[0029] Figure 7 This is a partial cross-sectional view of a tooth box according to an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of the sealing plate structure according to an embodiment of the present invention;

[0031] Figure 9 A top view of a sealing piece according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic structural diagram of a push column assembly when it is fixed according to an embodiment of the present invention;

[0033] Figure 11 Schematic diagram of the structure of the push column group according to an embodiment of the present invention.

[0034] In the picture:

[0035] 1-Dust box; 2-Blocking mechanism; 3-Gear box; 4-Sealing ring; 5-Upper fixing plate; 6-Upper blocking plate; 7-Spring; 8-Lower fixing plate; 9-Lower blocking plate; 10-Guide rail assembly; 11-Sweeper body; 12-Tilting platform; 13-Wind drum;

[0036] 101-dust inlet;

[0037] 301-step groove; 302-sealing piece; 303-pull block; 304-through column; 305-adjusting piece; 306-slider groove; 307-movable slider; 308-blocking platform; 309-anti-magnetic platform; 310-card suction sleeve; 311-driving column; 312-cylinder;

[0038] 501-quick-connector assembly; 502-connecting column; 503-rotating sleeve; 504-torsion spring; 505-push column assembly; 506-hook column; 507-hook platform; 508-rubber platform; 509-limiting block; 510-push column. DETAILED DESCRIPTION

[0039] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0040] like Figure 1 、 Figures 3 to 5 As shown, the present invention provides a dust-preventing mechanism for the dust box of a sweeping machine, which can solve the problem of dust falling again due to loose sealing when the dust box 1 is pulled out by adding a blocking mechanism 2 with an automatic closing effect inside the dust box 1; and can also prevent the dust box 3 from being blocked by waste debris when a large amount of waste debris accumulates in the dust box through a sealing piece 302.

[0041] The mechanism includes a dust box 1 movably connected to the sweeper body 11 and a wind drum 13 installed in the sweeper body 11. The dust box 1 is provided with a dust inlet 101 at one end close to the wind drum 13, and a blocking mechanism 2 for closing the dust inlet 101 is installed at a position corresponding to the inner wall of the dust box 1 and the dust inlet 101. A tooth box 3 with a right-angled trapezoidal structure in cross section is provided on the wind drum 13 and is used to push open the blocking mechanism 2 and insert the dust inlet 101 to guide dust into the dust box 1.

[0042] The working principle of this mechanism in daily use is the same as that of the common sweepers on the market. When in use, the dust box 1 can be directly inserted into the sweeper body 11. During the insertion process, the tooth box 3 will push open the blocking mechanism 2 and insert it into the dust inlet 101. Then the air blower 13 is started, so that waste debris or dust is sucked into the tooth box 3 and introduced into the dust box 1 through the tooth box 3.

[0043] like Figure 1 and Figure 2 As shown, the blocking mechanism 2 includes a lower fixed plate 8 connected to the inner wall of one end of the dust box 1 close to the dust inlet 101, and the upper fixed plate 5 is connected to the side of the lower fixed plate 8 away from the dust inlet 101, and a guide rail group 10 is installed between the lower fixed plate 8 and the upper fixed plate 5, and an upper blocking piece 6 and a lower blocking piece 9 for closing the dust inlet 101 are movably connected to the guide rail group 10, and a spring 7 for resetting the upper blocking piece 6 and the lower blocking piece 9 is connected to the guide rail group 10, and the upper blocking piece 6 and the lower blocking piece 9 are both installed with an inclined platform 12 on the end surface close to the dust inlet 101 for assisting the tooth box box 3 to push the upper blocking piece 6 and the lower blocking piece 9 to slide, and the length value of the inclined platform 12 is equal to the length value of the tooth box box 3.

[0044] (When the dust box 1 is not inserted into the sweeper 11, the upper blocking piece 6 and the lower blocking piece 9 in the blocking module 2 are in a normally closed state under the thrust of the spring 7).

[0045] The blocking mechanism 2 can automatically close the dust inlet 101 when the dust box 1 is inserted into the sweeper body 11. During its specific implementation, once the dust box 1 is inserted into the sweeper body 11, the tooth box 3 will move toward the dust inlet 101. When the tooth box 3 contacts the inclined platforms 12 on the upper blocking piece 6 and the lower blocking piece 9, the inclined platforms 12 on the two blocking pieces will contact the tooth box 3. Then, when the dust box 1 continues to be pushed into the sweeper body 11, the inclined platform 12 of the upper blocking piece 6 will contact and move with the inclined surface of the tooth box box 3, and the lower blocking piece 9 will also be pushed by the side of the tooth box box 3. At this time, the two blocking pieces will move toward each other along the guide rail group 10, and at the same time squeeze the spring 7 to complete the opening of the air inlet.

[0046] Once the dust box 1 is pulled out, the spring 7 will reset, pushing the upper blocking piece 6 and the lower blocking piece 9 to reset respectively until the upper blocking piece 6 and the lower blocking piece 9 seal the dust inlet 101, thus completing the purpose of automatically closing the dust inlet 101.

[0047] A sealing ring 4 is installed on the side wall of one end of the tooth box 3 close to the wind cylinder 13 to assist in sealing between the tooth box 3 and the dust box 1.

[0048] The sealing ring 4 is provided to enhance the sealing effect, that is, when the tooth box 3 is inserted into the dust inlet 101, the sealing ring 4 will seal the gap between the tooth box 3 and the dust box 1, so that dust will not fall easily from the gap.

[0049] like Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9As shown, the tooth box box 3 is provided with a stepped groove 301 on the inner wall of the side close to the lower blocking piece 9, and a blocking piece 302 is connected to the stepped groove 301. The end surface of the blocking piece 302 close to the dust inlet 101 is provided with a pull-position spring block 303 connected to the end face of the inner wall of the stepped groove 301, and the blocking piece 302 is provided with a through-column 304 that passes through the tooth box box 3 to the outside at the end close to the dust inlet 101, and the side wall of the tooth box box 3 is provided with an adjusting piece 305 connected to the through-column 304. 01 is provided with a slider groove 306 in the inner wall, and a movable slider 307 is connected in the slider groove 306 for pushing the regulating piece 305 to deflect the blocking piece 302 and press it into the stepped groove 301. The through column 304 is composed of a driving column 311 with a pentagonal cross section and a cylinder 312 installed at both ends of the driving column 311. The cylinder 312 is directly connected to the regulating piece 305. The driving column 311 is provided in this way to facilitate the movement with the blocking piece 302. The structure of the through column 304 can be combined with Figure 7 and Figure 9 To find out.

[0050] (In daily use, the blocking piece 302 will block the tooth box 3 under the action of the pulling spring block 303).

[0051] This arrangement is to play the role of blocking the tooth box 3. In its specific implementation, if the dust box 1 is inserted into the dust inlet 101, until the tooth box 3 is fully inserted, the adjusting piece 305 will contact the movable slider 307 (these two structures can be made of rubber, which will not easily cause the dust box 1 to be unable to be inserted). After that, the contacting adjusting piece 305 will deflect, and the deflected adjusting piece 305 will rotate with the cylinder 312 and the driving column 311, and the rotating driving column 311 will move with the blocking piece 302 (and the blocking piece 302 will move during the movement). During the tilting process, the pull-position spring block 303 will be stretched until the sealing piece 302 is pressed into the stepped groove 301. At this time, the sealing piece 302 will not block the dust from passing through the tooth box 3 into the dust box 1. When the user pulls out the dust box 1, the adjusting piece 305 will no longer contact the movable slider 307. Then the pull-position spring block 303 (which can be a spring) will be reset, causing the sealing piece 302 to gradually tilt toward the dust inlet 101. During the tilting process, the dust in the tooth box 3 will be poured into the dust box 1 to prevent the tooth box 3 from being blocked, thereby affecting subsequent use.

[0052] like Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, a plurality of blocking platforms 308 with a triangular cross-section are installed on the surface of one side of the sealing piece 302 away from the stepped groove 301, and an anti-magnetic platform 309 is installed on the other side of the sealing piece 302, and a card suction sleeve 310 for sucking the anti-magnetic platform 309 is installed on the inner wall of the stepped groove 301.

[0053] The blocking platform 308 is set to block the waste dust when it accumulates too much and backflow occurs (when the dust suction wind sucks in the dust, it will be blown directly into the dust box 1 and contact the inner wall of the box. Once the dust accumulates too much, the dust will be blown back by the wind). The specific structure is as follows: Figure 8 and Figure 9 As shown, dust will only enter the dust box 1 and will not easily return to the dust box 1. The anti-exit magnetic platform 309 is provided so that when the sealing piece 302 is pressed into the stepped groove 301, the anti-exit magnetic platform 309 can be directly stuck into the suction sleeve 310 (the principle of magnetic attraction) to fix the sealing piece 302, so that the sealing piece 302 will not be easily reset and tilted.

[0054] like Figure 5 、 Figure 6 、 Figure 11 and Figure 10 As shown, a quick-connect platform group 501 is installed on the surface of the side of the upper fixed plate 5 away from the dust inlet 101 (the length of the quick-connect platform group 501 should be adjusted according to demand), and a connecting column 502 is installed on the quick-connect platform group 501. A rotating sleeve 503 is provided on the outer side of the connecting column 502, and a torsion spring 504 is installed between the connecting column 502 and the rotating sleeve 503. A push column group 505 is installed on the side wall of the rotating sleeve 503 on the side close to the dust inlet 101, and a hooking column 506 is installed on the side wall of the push column group 505. A hooking platform 507 for hooking the hooking column 506 is installed on the side wall of the upper fixed plate 5. The end of the hooking column 506 close to the dust inlet 101 is provided with a rubber platform 508 connected to the movable slider 307 and used to push the hooking column 506.

[0055] When the tooth box box 3 is fully inserted into the dust inlet 101, the movable slider 307 will be pushed, and the movable movable slider 307 will also move with the rubber platform 508. When the rubber platform 508 contacts the hooking column 506, it will be pushed out of the hooking column 507. Then the hooking column 506 will no longer hook the push column group 505. When the push column group 505 has no external force, the torsion spring 504 will play a role and rotate with the rotating sleeve 503. Then the rotating rotating sleeve 503 will move with the push column group 505. A limiting block 509 with a triangular cross-section is installed on the outer wall on the other side. The push column group 505 is composed of several push columns 510 whose ends are connected to the rotating sleeve 503. Therefore, several push columns 510 will push the dust accumulated at the dust inlet 101 into the dust box 1 to avoid dust accumulation at the dust inlet 101, so as to reduce the chance of dust falling. When the rotating sleeve 503 rotates to a certain area, the limiting block 509 will limit the rotating sleeve 503 so that it no longer continues to rotate, so as to avoid the push columns 510 failing to meet the expected requirements.

[0056] The cross section of the tooth box 3 is in a U-shaped structure, and the height of the tooth box 3 is equal to the width of the dust inlet 101.

[0057] This arrangement is to ensure that dust can fully enter the dust box 1 through the dust inlet 101, and will not accumulate in the gap between the dust inlet 101 and the dust box 3.

[0058] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A dust-preventing mechanism for a vacuum cleaner box, characterized in that: The utility model comprises a dust box (1) movably connected to a sweeping machine body (11) and a wind drum (13) installed in the sweeping machine body (11); the dust box (1) is provided with a dust inlet (101) at one end close to the wind drum (13); a blocking mechanism (2) for closing the dust inlet (101) is installed at a position corresponding to the dust inlet (101) on the inner wall of the dust box (1); and a tooth box (3) having a right-angled trapezoidal cross section is provided on the wind drum (13) and is used for pushing open the blocking mechanism (2) and inserting into the dust inlet (101) to guide dust into the dust box (1); The blocking mechanism (2) comprises a lower fixing plate (8) connected to the inner wall of one end of the dust box (1) close to the dust inlet (101); an upper fixing plate (5) is connected to the side of the lower fixing plate (8) away from the dust inlet (101); a guide rail group (10) is installed between the lower fixing plate (8) and the upper fixing plate (5); an upper blocking piece (6) and a lower blocking piece (9) for closing the dust inlet (101) are movably connected to the guide rail group (10); and a spring (7) for resetting the upper blocking piece (6) and the lower blocking piece (9) is connected to the guide rail group (10); The upper blocking piece (6) and the lower blocking piece (9) are both installed with a tilting platform (12) on one end surface close to the dust inlet (101) for assisting the tooth box (3) to push the upper blocking piece (6) and the lower blocking piece (9) to slide, and the length of the tilting platform (12) is equal to the length of the tooth box (3); A sealing ring (4) for assisting in sealing between the tooth box (3) and the dust box (1) is installed on a side wall of one end of the tooth box (3) close to the wind tube (13).

2. The dust-preventing mechanism for the dust collecting box of a sweeper according to claim 1, characterized in that: The tooth box box (3) is provided with a stepped groove (301) on the inner wall of one side close to the lower blocking piece (9), and a sealing piece (302) is connected in the stepped groove (301). The end surface of the sealing piece (302) close to the dust inlet (101) is provided with a pull-position spring block (303) whose end face is connected to the inner wall of the stepped groove (301), and the sealing piece (302) is provided with a through-column (304) that penetrates the tooth box box (3) to the outside at one end close to the dust inlet (101). The side wall of the tooth box box (3) is provided with an adjusting piece (305) connected to the through-column (304), and the inner wall of the dust inlet (101) is provided with a slider groove (306), and a movable slider (307) is connected in the slider groove (306) for pushing the adjusting piece (305) to deflect the sealing piece (302) and press it into the stepped groove (301).

3. The dust-preventing mechanism for the dust collecting box of a sweeper according to claim 2, characterized in that: A plurality of blocking platforms (308) with triangular cross-sections are installed on the surface of one side of the sealing piece (302) away from the stepped groove (301), and an anti-magnetic platform (309) is installed on the surface of the other side of the sealing piece (302), and a card suction sleeve (310) for sucking the anti-magnetic platform (309) is installed on the inner wall of the stepped groove (301).

4. The dust-preventing mechanism for a vacuum cleaner box according to claim 1, characterized in that: A quick-connect platform group (501) is installed on the surface of the side of the upper fixed plate (5) away from the dust inlet (101), and a connecting column (502) is installed on the quick-connect platform group (501). The outer side of the connecting column (502) is provided with a rotating sleeve (503), and a torsion spring (504) is installed between the connecting column (502) and the rotating sleeve (503). The rotating sleeve (503) is provided with a push column group (505) on the side wall near the dust inlet (101), and a hooking column (506) is installed on the side wall of the push column group (505). A hooking platform (507) for hooking the hooking column (506) is installed on the side wall of the upper fixed plate (5). The hooking column (506) is provided with a rubber platform (508) connected to the movable slider (307) and used to push the hooking column (506) at one end near the dust inlet (101).

5. The dust-preventing mechanism for the dust collecting box of a sweeping machine according to claim 4, characterized in that: A limiting block (509) having a triangular cross-section is installed on the outer wall of the other side of the rotating sleeve (503), and the pushing column group (505) is composed of a plurality of pushing columns (510) whose ends are connected to the rotating sleeve (503).

6. The dust-preventing mechanism for a vacuum cleaner box according to claim 1, characterized in that: The cross section of the tooth box (3) is in the shape of a square, and the height of the tooth box (3) is equal to the width of the dust inlet (101).

7. The dust-preventing mechanism for a vacuum cleaner box according to claim 2, characterized in that: The through column (304) is composed of a driving column (311) with a pentagonal cross section and cylinders (312) installed at both ends of the driving column (311), and the cylinders (312) are directly connected to the regulating piece (305).

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