CN211251997U

CN211251997U - Automatic dust collection blackboard eraser capable of reversing automatically

Info

Publication number: CN211251997U
Application number: CN201921992454.6U
Authority: CN
Inventors: 张帆; 韩丁锐; 薛超凡; 田俊梅
Original assignee: Shanxi University
Current assignee: Shanxi University
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-08-14
Anticipated expiration: 2029-11-18

Abstract

The utility model belongs to the technical field of the blackboard eraser, concretely relates to automatic reversing's collection dirt blackboard eraser, including casing, operating device and dust collection box, operating device includes pivot, No. two pivots and No. two dead axles, the both ends of pivot are rotatable setting respectively on the roof and the bottom plate of casing, the upper portion and the lower part of pivot are fixed respectively and are provided with No. two swinging arms and a swinging arm, the other end of No. two swinging arms passes the rotatable mounting panel that is connected with of the front wall of casing, the utility model discloses a relative silver of casing and the relative displacement of mounting panel realize automatic reversing, realized controlling the automatic reversing on the basis of the collection dirt of machinery again, increased the efficiency of wiping the blackboard; the utility model discloses set up the baffle that can stretch out or retract along with automatic reversing for in supplementary dust falls into the accepting, improved the collection dirt effect.

Description

Automatic dust collection blackboard eraser capable of reversing automatically

Technical Field

The utility model belongs to the technical field of the blackboard eraser, concretely relates to automatic dirt collection blackboard eraser of switching-over.

Background

In China, chalks are still a necessary tool for teachers to give lessons, almost all teachers use traditional chalks to give lessons, and harm caused by dust of the chalks cannot be ignored. The chalk is made of calcium carbonate and calcium sulfate, and teachers can generate a large amount of chalk dust when using the chalk. The dust cannot be scattered as soon as possible and floats in the air, so that the dust harms the health of teachers and students. Meanwhile, the manufacture and use of chalks also cause a lot of environmental pollution problems, so that the design of a blackboard eraser capable of collecting dust is an urgent need.

Based on the above situation, a large number of dust-removing blackboard erasers, such as electric blackboard erasers, electrostatic dust-removing blackboard erasers, etc., appear on the market today. But it requires batteries to consume energy and thus "battery pollution", poses more serious environmental hazards, and requires higher costs. The specific use shows that the collection effect is not good, and the principle utilizes wind power to generate negative pressure so as to achieve the purpose of absorbing dust. The collecting effect is not good because its negative pressure is small.

Patent No. 201821799665.3 discloses a mechanical dust collection type different-side transfer blackboard eraser, which can collect dust mechanically, but because the direction change of the mechanical dust collection type different-side transfer blackboard eraser requires a handle to be turned every time, the using states of the left and right blackboard erasers are adjusted, so that the blackboard erasing work can not be continuously performed, and great inconvenience is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides an automatic collection dirt blackboard eraser of switching-over to above-mentioned problem.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an automatic reversing dust collection blackboard eraser comprises a shell, a working mechanism and a dust collection box, wherein the working mechanism comprises a first rotating shaft, a second rotating shaft and a second fixed shaft, two ends of the first rotating shaft are respectively rotatably arranged on a top plate and a bottom plate of the shell, a second swinging rod and a first swinging rod are respectively and fixedly arranged on the upper portion and the lower portion of the first rotating shaft, the other end of the second swinging rod penetrates through the front wall of the shell and is rotatably connected with a mounting plate, a cotton sliver is arranged on the mounting plate, the other end of the first swinging rod is of a hollow structure, a first sliding rod is arranged in the hollow structure of the first swinging rod, the other end of the first sliding rod is hinged to the middle of a first U-shaped piece, the second rotating shaft penetrates through two end portions of the first U-shaped piece, two limiting rings are arranged on the second rotating shaft to limit the first U-shaped piece to move relative to the second rotating shaft, the two ends of the second rotating shaft are rotatably arranged on the left side wall and the right side wall of the bearing piece, the bottom of the bearing piece is obliquely arranged, the bearing piece is arranged at the bottom of the front surface of the shell, the second fixed shaft is fixedly arranged on the front surface of the shell and is positioned below the mounting plate, a first bevel gear is rotatably arranged on the second fixed shaft, the edge of the first bevel gear is flush with the front surface of the cotton sliver, two second bevel gears corresponding to the first bevel gear are fixedly arranged on the second rotating shaft, the two second bevel gears are oppositely arranged, two sides of the second rotating shaft are fixedly provided with brushes, the dust collecting box is a box body with an opening on the front surface, the dust collecting box is positioned at the front end of the inner side of the bottom plate of the shell and is communicated with the bearing piece, an opening for the second swing rod and the first sliding rod to move is formed in the front wall of the shell.

Further, the inside dead axle that still fixedly is provided with of casing rotatable T type connecting piece that is provided with on the dead axle the front portion of T type connecting piece is provided with the spout No. one be provided with No. two U type spares in the spout, the both ends and pivot fixed connection of No. two U type spares, both ends are hollow structure about the T type connecting piece be provided with No. two slide bars in the hollow structure of T type connecting piece, the other end of No. two slide bars articulates on the baffle, the baffle sets up in No. two spouts on lateral wall about the casing for block the dust so that the dust falls on the accepting.

Furthermore, a positioning plate is arranged on the inner side of the second sliding groove to limit the baffle plate to move only in the second sliding groove; the position that is close to the baffle on No. two slide bars is provided with the stopper No. two the cover is equipped with a spring on the slide bar, a spring is located between stopper and the T type connecting piece to supplementary stretching out of No. two slide bars.

Furthermore, the front side edge of the baffle is provided with cotton cloth to prevent the hard contact friction between the baffle and the blackboard from damaging the blackboard and simultaneously perform secondary wiping on the blackboard.

Furthermore, a rubber edge is arranged on the front side edge of the bearing piece to prevent the hard friction between the bearing piece and the blackboard from damaging the blackboard.

Still further, the back fixedly connected with pivot No. three of mounting panel be provided with the shaft hole that is used for installing pivot No. three on the swinging arms set up 20 degrees openings on the shaft hole to supply pivot No. three to be connected with the mounting panel, and the turned angle of restriction mounting panel.

Furthermore, the inside of the dust collection box is provided with a push block, the two sides of the dust collection box are provided with openings, the openings at the two sides are respectively provided with a limiting plate and a storage device, the shell is also provided with a storage box, a push rod is movably arranged in the storage box, the push rod can pass through the limiting plate to be connected with the push block, and the push block is controlled to push the dust in the dust collection box into the storage device.

Furthermore, a cross-shaped limiting part is arranged at the front end of the push rod, the push block sequentially consists of a cotton cloth layer, a plastic layer and an iron block layer, the cotton cloth layer is used for directly contacting dust, a limiting opening is formed in the outer side of the iron block layer, a rotating cavity communicated with the limiting opening is formed in the inner side of the iron block layer, and a through hole used for accommodating the end head of the cross-shaped limiting part is formed in the plastic layer; the limiting plate is a magnet.

Furthermore, the storage device comprises a storage box, a transition box, a support, a control panel, a push plate and a sliding door, wherein the transition box and the support are fixed on the side wall of the shell, the transition box is communicated with the dust collection box, the storage box is movably placed on the support and is communicated with the transition box, a screw is connected to one side wall of the support in a threaded manner and is used for fixing the transition box, a third sliding groove is formed in the position, close to the storage box, of the transition box, a sliding door is arranged in the third sliding groove and can slide into the shell, a connecting column is arranged on one side, far away from the shell, of the upper surface of the sliding door, a roller is arranged on the connecting column, a fourth sliding groove is formed in the upper surface of the transition box, the control panel is arranged above the transition box, the width of the control panel is the same as that of the transition box, and the side edge of the control connecting column of, the push plate is arranged in the transition box, an L-shaped rod is connected to the push plate, the L-shaped rod penetrates through the fourth sliding groove to be connected with the control panel, and a control block is arranged above the control panel.

Furthermore, a limiting strip is arranged inside the shell, a limiting groove for limiting the sliding door is formed between the limiting strip and the rear wall of the dust collection box, a second spring is arranged on one side, close to the shell, of the sliding door, and the other end of the second spring is connected with the inside of the shell so as to reset the sliding door.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model realizes automatic reversing through the relative displacement of the shell relative to the cotton sliver and the mounting plate, realizes left and right automatic reversing on the basis of mechanical dust collection, and increases the efficiency of blackboard cleaning;

2. the utility model discloses set up the baffle that can stretch out or retract along with automatic reversing for in supplementary dust falls into the accepting, improved the collection dirt effect.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the case-less and dust-collecting box of the present invention;

FIG. 3 is a schematic structural view of the case-less and dust-collecting box of the present invention;

FIG. 4 is a schematic structural view of the present invention with the top plate, the rear sidewall and the right sidewall of the housing removed;

FIG. 5 is a schematic view of the connection between the second swing rod and the mounting plate of the present invention;

fig. 6 is a partially enlarged view of circle B in fig. 4 according to the present invention;

fig. 7 is a schematic structural view of the push block of the present invention;

fig. 8 is a schematic structural view of the storage device of the present invention;

fig. 9 is a schematic structural view of the storage device of the present invention;

fig. 10 is an enlarged view of a portion of circle a in fig. 4 according to the present invention;

fig. 11 is a schematic structural view of the push rod of the present invention;

wherein the shell body-1, the dust collection box-2, the first rotating shaft-3, the second rotating shaft-4, the second fixed shaft-5, the second swinging rod-6, the first swinging rod-7, the mounting plate-8, the cotton sliver-9, the first sliding rod-10, the first U-shaped part-11, the L-shaped rod-12, the limiting ring-13, the bearing part-14, the limiting block-15, the first bevel gear-16, the second bevel gear-17, the brush-18, the first fixed shaft-19, the T-shaped connecting part-20, the first sliding chute-21, the second U-shaped part-22, the second sliding rod-23, the baffle-24, the second sliding chute-25, the positioning plate-26, the first spring-27, the third rotating shaft-28, the shaft hole-29, the push block-30, the limiting plate-31, the storage device-32, the storage box-33, the push rod-34, the cross limiting piece-35, the cotton cloth layer-36, the plastic layer-37, the iron block layer-38, the limiting opening-39, the rotating cavity-40, through hole-41, storage box-42, transition box-43, support-44, control panel-45, push pedal-46, sliding door-47, screw-48, No. three spout-49, spliced pole-50, gyro wheel-51, No. four spout-52, control piece-53, spacing strip-54, spacing groove-55, No. two spring-56, stopper-57, plunger rod-58, barrel-59, response bump-60, pushing hands-61.

Detailed Description

In order to further illustrate the technical solution of the present invention, the present invention is further explained by the following embodiments.

As shown in fig. 1 to 11, a dust collecting blackboard eraser capable of automatically reversing direction comprises a housing 1, an operating mechanism and a dust collecting box 2, the working mechanism comprises a first rotating shaft 3, a second rotating shaft 4 and a second fixed shaft 5, two ends of the first rotating shaft 3 are respectively and rotatably arranged on the top plate and the bottom plate of the shell 1, a second swing rod 6 and a first swing rod 7 are respectively and fixedly arranged at the upper part and the lower part of the first rotating shaft 3, the other end of the second swing rod 6 penetrates through the front wall of the shell 1 to be connected with a mounting plate 8, the back surface of the mounting plate 8 is fixedly connected with a third rotating shaft 28, the second swing lever 6 is provided with a shaft hole 29 for mounting a third rotating shaft 28, the third rotating shaft 28 is arranged in the shaft hole 29, an opening of 20 degrees is formed in the shaft hole 29 to connect the third rotating shaft 28 with the mounting plate 8 and limit the rotating angle of the mounting plate 8. The cotton sliver 9 is arranged on the mounting plate 8, the other end of the first swinging rod 7 is of a hollow structure, a first sliding rod 10 is arranged in the hollow structure of the first swinging rod 7, the other end of the first sliding rod 10 is hinged to the middle part of a first U-shaped part 11, the second rotating shaft 4 penetrates through two end parts of the first U-shaped part 11, two limiting rings 13 are arranged on the second rotating shaft 4 to limit the movement of the first U-shaped part 11 relative to the second rotating shaft 4, two ends of the second rotating shaft 4 are rotatably arranged on the left side wall and the right side wall of a bearing part 14, the bottom of the bearing part 14 is obliquely arranged, the bearing part 14 is arranged at the bottom of the front surface of the shell 1, a rubber edge is arranged on the front side edge of the bearing part 14, the second fixed shaft 5 is fixedly arranged on the front surface of the shell 1, the second fixed shaft 5 is positioned below the mounting plate 8, a first bevel gear 16 is rotatably arranged on the second fixed shaft 5, the edge of the first bevel gear 16 is flush with the front surface of the cotton sliver 9, two second bevel gears 17 corresponding to the first bevel gear 16 are fixedly arranged on the second rotating shaft 4, the two second bevel gears 17 are oppositely arranged, brushes 18 are fixedly arranged on two sides of the second rotating shaft 4, the dust collection box 2 is a box body with an opening on the front surface, the dust collection box 2 is positioned at the front end of the inner side of the bottom plate of the shell 1 and is communicated with the bearing part 14, a push block 30 is arranged in the dust collection box 2, two openings on two sides of the dust collection box 2 are respectively provided with a limit plate 31 and a storage device 32, the shell 1 is also provided with a storage box 33, a push rod 34 is movably arranged in the storage box 33, the push rod 34 comprises a cylinder 59, a plunger rod 58, a plug 57 and a push handle 61, the plug 57 and the push handle 61 are respectively arranged at two ends of the plunger rod 58, the plug 57 is located inside the cylinder 59, the cross limiting part 35 is disposed at the front end of the cylinder 59, the end of the cross limiting part 35 is an injection hole, the plunger rod 58 is uniformly provided with a plurality of induction protrusions 60, a circle of corresponding induction protrusions 60 is annularly disposed at the middle position of the inner wall of the cylinder wall, the induction protrusions 60 are made of elastic materials, such as rubber, and the cross limiting part 35 of the push rod 34 can penetrate through the limiting plate 31 to be connected with the push block 30. A cross limiting piece 35 is arranged at the front end of the push rod 34, the push block 30 sequentially comprises a cotton cloth layer 36, a plastic layer 37 and an iron block layer 38, the cotton cloth layer 36 is used for directly contacting with dust, a limiting opening 39 is arranged on the outer side of the iron block layer 38, a rotating cavity 40 communicated with the limiting opening 39 is arranged on the inner side of the iron block layer 38, and a through hole 41 used for accommodating the end of the cross limiting piece 35 is arranged on the plastic layer 37; the limiting plate 31 is a magnet. The storage device 32 comprises a storage box 42, a transition box 43, a bracket 44, a control panel 45, a push plate 46 and a sliding door 47, the transition box 43 and the bracket 44 are fixed on the side wall of the casing 1, the transition box 43 is communicated with the dust collection box 2, the storage box 42 is movably placed on the bracket 44 and is communicated with the transition box 43, a screw 48 is connected with one side wall of the bracket 44 in a threaded manner and is used for fixing the transition box 43, a third sliding groove 49 is arranged on the transition box 43 close to the storage box 42, a sliding door 47 is arranged in the third sliding groove 49, the sliding door 47 can slide into the casing 1, a connecting column 50 is arranged on one side of the upper surface of the sliding door 47 far away from the casing 1, a roller 51 is arranged on the connecting column 50, a fourth sliding groove 52 is arranged on the upper surface of the transition box 43, the control panel 45 is arranged above the transition box 43, the width of control panel 45 is the same with the width of transition box 43, and the side of control panel 45 control connection post 50 is the slope setting, push pedal 46 sets up in transition box 43, and passes No. four spout 52 and be connected with control panel 45 the top of control panel 45 is provided with control block 53. A limiting strip 54 is arranged inside the shell 1, a limiting groove 55 for limiting the sliding door 47 is formed between the limiting strip 54 and the rear wall of the dust collection box 2, a second spring 56 is arranged on one side of the sliding door 47 close to the shell 1, and the other end of the second spring 56 is connected with the inside of the shell 1 so as to reset the sliding door 47. An opening for moving the second swing rod 6 and the first sliding rod 10 is arranged on the front wall of the shell 1. Still be fixed with a dead axle 19 in casing 1 the rotatable T type connecting piece 20 that is provided with on dead axle 19 the front portion of T type connecting piece 20 is provided with a spout 21 No. one the spout 21 is provided with No. two U type spare 22 in, No. two U type spare 22's both ends and pivot 3 fixed connection No. two, the left and right sides of T type connecting piece 20 is hollow structure be provided with No. two slide bars 23 in the hollow structure of T type connecting piece 20, the other end of No. two slide bars 23 articulates on baffle 24, baffle 24 sets up in No. two spouts 25 on the lateral wall about casing 1 for block the dust so that the dust falls on accepting 14. The front side edge of the baffle plate 24 is provided with cotton cloth to prevent the hard contact friction between the baffle plate 24 and the blackboard from damaging the blackboard, and the blackboard can be wiped secondarily. A positioning plate 26 is arranged on the inner side of the second sliding groove 25 to limit the baffle plate 24 to move only in the second sliding groove 25; a limiting block 15 is arranged on the position, close to the baffle 24, of the second sliding rod 23, a first spring 27 is sleeved on the second sliding rod 23, and the first spring 27 is located between the limiting block 15 and the T-shaped connecting piece 20 to assist the second sliding rod 23 in extending out.

The working principle is as follows: when the blackboard is erased by using the cotton sliver, the first rotating shaft 3 can be rotatably arranged in the shell 1, so that the shell 1 can rotate relative to the mounting plate 8 until the second swinging rod 6 contacts the side edge of the opening, and simultaneously, the first swinging rod 7 can also rotate along with the first rotating shaft 3, and finally, the corresponding second bevel gear 17 is driven to be meshed with the first bevel gear 16, specifically, when the mounting plate 8 deflects to the right side of the shell 1, the second swinging rod 6 simultaneously drives the left second bevel gear 17 to be meshed with the first bevel gear 16, the blackboard is erased from right to left, the first bevel gear 16 is overlooked and rotates clockwise, the first bevel gear 16 drives the second rotating shaft 4 to rotate through the second bevel gear 17, and finally, the brush 18 is driven to brush dust into the dust collection box 2, the push rod 34 is taken out to extend into the push block 30 and rotates for a certain angle, so that the push rod 34 can push out the push block 30, the push block 30 can also be pulled back, the plunger rod 58 is pushed to move for a distance of sensing the salient points, a certain amount of water flows out from the injection hole to soak the cotton cloth layer 36, then the push block 30 is pushed to push the dust into the transition box 43, the wetted cotton cloth layer 36 extrudes the dust into blocks, then the push block 30 is retracted, the push rod 34 is placed back into the storage box 33, the control block 53 is pushed along the four-number sliding groove 52 to move the control plate 45, the inclined end of the control plate 45 stretches the sliding door 47 open, then the push plate 46 pushes the compressed dust into the storage box 42, the control plate 45 is reset by the push block 53, the sliding door 47 automatically resets under the action of the second spring 56, and the storage box 42 is sealed.

The essential features and advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an automatic collection dirt blackboard eraser of switching-over which characterized in that: the dust collection box comprises a shell (1), a working mechanism and a dust collection box (2), wherein the working mechanism comprises a first rotating shaft (3), a second rotating shaft (4) and a second fixed shaft (5), two ends of the first rotating shaft (3) are respectively rotatably arranged on a top plate and a bottom plate of the shell (1), the upper portion and the lower portion of the first rotating shaft (3) are respectively and fixedly provided with a second swinging rod (6) and a first swinging rod (7), the other end of the second swinging rod (6) penetrates through a front wall of the shell (1) and is rotatably connected with a mounting plate (8), a cotton sliver (9) is arranged on the mounting plate (8), the other end of the first swinging rod (7) is of a hollow structure, a first sliding rod (10) is arranged in the hollow structure of the first swinging rod (7), and the other end of the first sliding rod (10) is hinged to the middle of a U-shaped piece (11), the second rotating shaft (4) penetrates through two end parts of the first U-shaped part (11), two limiting rings (13) are arranged on the second rotating shaft (4) to limit the first U-shaped part (11) to move relative to the second rotating shaft (4), two ends of the second rotating shaft (4) are rotatably arranged on the left side wall and the right side wall of the bearing piece (14), the bottom of the bearing piece (14) is obliquely arranged, the bearing piece (14) is arranged at the bottom of the front surface of the shell (1), the second fixed shaft (5) is fixedly arranged on the front surface of the shell (1), the second fixed shaft (5) is positioned below the mounting plate (8), a first bevel gear (16) is rotatably arranged on the second fixed shaft (5), the edge of the first bevel gear (16) is flush with the front surface of the cotton sliver (9), two second bevel gears (17) corresponding to the first bevel gear (16) are fixedly arranged on the second rotating shaft (4), the two second bevel gears (17) are arranged oppositely, brushes (18) are fixedly arranged on two sides of the second rotating shaft (4), the dust collection box (2) is a box body with an opening in the front surface, the dust collection box (2) is located at the front end of the inner side of the bottom plate of the shell (1) and communicated with the bearing piece (14), and an opening for the second swinging rod (6) and the first sliding rod (10) to move is formed in the front wall of the shell (1).

2. The automatic reversing dust-collecting blackboard eraser according to claim 1, wherein: the dust collecting device is characterized in that a first fixed shaft (19) is fixedly arranged inside the shell (1), a T-shaped connecting piece (20) is rotatably arranged on the first fixed shaft (19), a first sliding groove (21) is formed in the front portion of the T-shaped connecting piece (20), a second U-shaped piece (22) is arranged in the first sliding groove (21), two ends of the second U-shaped piece (22) are fixedly connected with a first rotating shaft (3), the left end and the right end of the T-shaped connecting piece (20) are of a hollow structure, a second sliding rod (23) is arranged in the hollow structure of the T-shaped connecting piece (20), the other end of the second sliding rod (23) is hinged to a baffle (24), and the baffle (24) is arranged in the second sliding groove (25) on the left side wall and the right side wall of the shell (1) and used for blocking dust so that the dust falls on the bearing piece (14).

3. The automatic reversing dust-collecting blackboard eraser according to claim 2, wherein: a positioning plate (26) is arranged on the inner side of the second sliding groove (25) to limit the baffle plate (24) to move only in the second sliding groove (25); no. two slide bar (23) go up the position that is close to baffle (24) and be provided with stopper (15) No. two slide bar (23) are gone up the cover and are equipped with spring (27), spring (27) are located between stopper (15) and T type connecting piece (20) to supplementary No. two slide bar (23) stretch out.

4. The automatic reversing dust-collecting blackboard eraser according to claim 2, wherein: the front side edge of the baffle (24) is provided with cotton cloth to prevent the hard contact friction between the baffle (24) and the blackboard from damaging the blackboard and simultaneously can wipe the blackboard for the second time.

5. The automatic reversing dust-collecting blackboard eraser according to claim 1, wherein: the front side edge of the bearing piece (14) is provided with a rubber edge to prevent the hard friction between the bearing piece (14) and the blackboard from damaging the blackboard.

6. The automatic reversing dust-collecting blackboard eraser according to claim 1, wherein: no. three pivot (28) of back fixedly connected with of mounting panel (8) be provided with shaft hole (29) that are used for installing No. three pivot (28) on No. two swinging arms (6) set up 20 degrees openings on shaft hole (29) to supply No. three pivot (28) to be connected with mounting panel (8), and restrict the turned angle of mounting panel (8).

7. The automatic reversing dust-collecting blackboard eraser according to claim 1, wherein: the dust collection box is characterized in that a pushing block (30) is arranged inside the dust collection box (2), openings are formed in two sides of the dust collection box (2), a limiting plate (31) and a storage device (32) are arranged at the openings of the two sides respectively, a storage box (33) is further arranged on the shell (1), a push rod (34) is movably arranged in the storage box (33), the push rod (34) can penetrate through the limiting plate (31) to be connected with the pushing block (30), and the pushing block (30) is controlled to push dust in the dust collection box (2) to the storage device (32).

8. The automatic reversing dust-collecting blackboard eraser according to claim 7, wherein: a cross limiting piece (35) is arranged at the front end of the push rod (34), the push block (30) sequentially comprises a cotton cloth layer (36), a plastic layer (37) and an iron block layer (38), the cotton cloth layer (36) is used for directly contacting dust, a limiting opening (39) is formed in the outer side of the iron block layer (38), a rotating cavity (40) communicated with the limiting opening (39) is formed in the inner side of the iron block layer (38), and a through hole (41) used for accommodating the end of the cross limiting piece (35) is formed in the plastic layer (37); the limiting plate (31) is a magnet.

9. The automatic reversing dust-collecting blackboard eraser according to claim 7, wherein: the storage device (32) comprises a storage box (42), a transition box (43), a support (44), a control panel (45), a push plate (46) and a sliding door (47), the transition box (43) and the support (44) are fixed on the side wall of the shell (1), the transition box (43) is communicated with the dust collection box (2), the storage box (42) is movably placed on the support (44) and is communicated with the transition box (43), one side wall of the support (44) is in threaded connection with a screw (48) for fixing the transition box (43), a third sliding groove (49) is formed in the position, close to the storage box (42), of the transition box (43), the sliding door (47) is arranged in the third sliding groove (49), the sliding door (47) can slide into the shell (1), and a connecting column (50) is arranged on one side, far away from the shell (1), of the upper surface of the sliding door (47), be provided with gyro wheel (51) on spliced pole (50) transition box (43) upper surface is provided with No. four spout (52), control panel (45) set up the top at transition box (43), the width of control panel (45) is the same with the width of transition box (43), and the side of control panel (45) control spliced pole (50) is the slope setting, push pedal (46) set up in transition box (43), and pass No. four spout (52) and be connected with control panel (45) the top of control panel (45) is provided with control block (53).

10. The automatic reversing dust collecting blackboard eraser according to claim 9, wherein: the dust collection box is characterized in that a limiting strip (54) is arranged inside the shell (1), a limiting groove (55) for limiting the sliding door (47) is formed between the limiting strip (54) and the rear wall of the dust collection box (2), a second spring (56) is arranged on one side, close to the shell (1), of the sliding door (47), and the other end of the second spring (56) is connected with the inside of the shell (1) to reset the sliding door (47).