CN110802971A - Automatic dust collection blackboard eraser capable of reversing automatically - Google Patents

Abstract

The invention belongs to the technical field of blackboard erasers, in particular to an automatic reversing dust collecting blackboard eraser, comprising a casing, a working mechanism and a dust collecting box, wherein the working mechanism comprises a No. 1 rotating shaft, a No. 2 rotating shaft and a No. 2 fixed shaft, The two ends of the No. 1 rotating shaft are respectively rotatably arranged on the top plate and the bottom plate of the casing, and the upper and lower parts of the No. 1 rotating shaft are respectively fixed with a No. 2 swing rod and a No. 1 swing rod. The other end of the swing rod passes through the front wall of the casing and is rotatably connected to the mounting plate. The present invention realizes automatic reversing through the relative displacement of the casing relative to the cotton sliver and the mounting plate, and realizes automatic left and right on the basis of mechanical dust collection. Reversing the direction increases the efficiency of wiping the blackboard; the present invention is provided with a baffle plate that can be extended or retracted along with the automatic reversing to assist the dust to fall into the receiving part, thereby improving the dust collection effect.

Description

An automatic reversing dust-collecting blackboard eraser

technical field

The invention belongs to the technical field of blackboard erasers, and particularly relates to an automatic reversing dust-collecting blackboard eraser.

Background technique

In today's China, chalk is still an essential tool for teachers to teach. Almost all teachers use traditional chalk to teach, and the harm caused by chalk dust cannot be ignored. The chalk is composed of calcium carbonate and calcium sulfate, and teachers create a lot of chalk dust when they use it. Because the dust cannot be dissipated as soon as possible, it floats in the air and endangers the health of teachers and students. At the same time, the manufacture and use of chalk will also cause many environmental pollution problems, so it is an urgent need to design a blackboard eraser that can collect dust.

Based on the above situation, a large number of dust-removing blackboard erasers, such as electric blackboard erasers and electrostatic dust-removing blackboard erasers, have appeared on the market today. However, it requires the battery to consume energy and thus causes "battery pollution", which causes more serious harm to the environment, and the cost is relatively high. And after specific use, it is found that its collection effect is not good. Its principle uses wind to generate negative pressure, and then achieves the purpose of absorbing dust. Due to its small negative pressure, the collection effect is not good.

Patent No. "201821799665.3" discloses a mechanical dust-collecting type different-side split blackboard eraser. Although it can perform mechanical dust collection, it needs to turn the handle every time it changes directions to adjust the use of the blackboard eraser on the left and right sides. state, resulting in the inability to continuously clean the blackboard, causing great inconvenience.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention provides a dust-collecting blackboard eraser with automatic reversal.

For achieving the above object, the present invention has adopted the following technical solutions:

An automatic reversing dust-collecting blackboard eraser, comprising a casing, a working mechanism and a dust-collecting box, the working mechanism includes a No. 1 rotating shaft, a No. It is rotatably arranged on the top plate and the bottom plate of the casing, and the upper and lower parts of the No. 1 rotating shaft are respectively fixed with a No. 2 swing rod and a No. 1 swing rod, and the other end of the No. 2 swing rod passes through the casing. The front wall is rotatably connected with a mounting plate, and a cotton sliver is arranged on the mounting plate. The other end of the No. 1 swing rod is a hollow structure, and a No. 1 sliding rod is arranged in the hollow structure of the No. 1 swing rod. The other end of the No. 1 sliding rod is hinged to the middle of the No. 1 U-shaped piece, the No. 2 rotating shaft is arranged through the two ends of the No. 1 U-shaped piece, and two limit rings are arranged on the No. 2 rotating shaft , in order to limit the movement of the No. 1 U-shaped piece relative to the No. 2 rotating shaft, the two ends of the No. 2 rotating shaft are rotatably arranged on the left and right side walls of the receiving part, the bottom of the receiving part is inclined, and the receiving part is arranged on the At the bottom of the front surface of the casing, the No. 2 fixed shaft is fixedly arranged on the front surface of the casing, and the No. 2 fixed shaft is located under the mounting plate, and a No. 1 bevel gear is rotatably arranged on the No. 2 fixed shaft, so The edge of the No. 1 bevel gear is flush with the front surface of the sliver, and two No. 2 bevel gears corresponding to the No. 1 bevel gear are fixedly arranged on the No. 2 rotating shaft, and the two No. 2 bevel gears are opposite to each other. Set, brushes are fixedly arranged on both sides of the No. 2 rotating shaft, the dust collecting box is a box body with an opening on the front surface, the dust collecting box is located at the front end of the inner side of the bottom plate of the shell, and communicates with the receiving part, and is in the The front wall of the casing is provided with an opening for the No. 2 swing rod and No. 1 sliding rod to move.

Further, a fixed shaft of No. 1 is also fixedly arranged inside the casing, a T-shaped connecting piece is rotatably arranged on the fixed shaft of No. 1, and a sliding groove of No. The No. 1 chute is provided with a No. 2 U-shaped piece, the two ends of the No. 2 U-shaped piece are fixedly connected with the No. 1 rotating shaft, and the left and right ends of the T-shaped connecting piece are hollow structures. The No. 2 sliding rod is arranged in the hollow structure of the T-shaped connecting piece, and the other end of the No. 2 sliding rod is hinged on the baffle plate. It is used to block the dust so that the dust falls on the receiving part.

Still further, a positioning plate is arranged on the inner side of the No. 2 chute to limit the baffle to move only in the No. 2 chute; a limit block is set on the No. 2 slide bar near the baffle, The No. 2 sliding rod is sleeved with a No. 1 spring, and the No. 1 spring is located between the limit block and the T-shaped connecting piece to assist the extension of the No. 2 sliding rod.

Furthermore, a cotton cloth is arranged on the front side of the baffle to prevent the baffle and the blackboard from being damaged by hard contact friction, and at the same time, the blackboard can be wiped twice.

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

Further, the No. 3 rotating shaft is fixedly connected to the back of the mounting plate, the No. 2 swinging rod is provided with a shaft hole for installing the No. 3 rotating shaft, and a 20-degree opening is opened on the shaft hole for three. The numbered shaft is connected with the mounting plate and limits the rotation angle of the mounting plate.

Further, a push block is arranged inside the dust collecting box, two sides of the dust collecting box are open, a limit plate and a storage device are respectively set at the openings on both sides, and a storage device is also arranged on the casing. A push rod is movably arranged in the storage box, and the push rod can be connected with the push block through the limit plate, and the push block is controlled to push the dust in the dust box to the storage device.

Further, a cross limiter is provided at the front end of the push rod, and the push block is sequentially composed of a cotton cloth layer, a plastic layer and an iron block layer. The outer side of the layer is provided with a limit opening, the inner side of the iron block layer is provided with a rotating cavity that communicates with the limit opening, and the plastic layer is provided with a through hole for accommodating the end of the cross limit piece; the limit The bit plate is a magnet.

Further, the storage device includes a storage box, a transition box, a bracket, a control panel, a push plate and a sliding door, the transition box and the bracket are fixed on the side wall of the casing, and the transition box is communicated with the dust collection box, The storage box is movably placed on the bracket and communicated with the transition box. A screw is threaded on one of the side walls of the bracket for fixing the transition box, and the transition box is close to the storage box. There is a No. 3 chute, a sliding door is arranged in the No. 3 chute, the sliding door can be slid into the inside of the casing, and a connecting column is arranged on the side of the upper surface of the sliding door away from the casing, and the sliding door is The connecting column is provided with a roller, the upper surface of the transition box is provided with a No. 4 chute, the control board is arranged above the transition box, the width of the control board is the same as the width of the transition box, and the control board controls The side of the connecting column is inclined, the push plate is arranged in the transition box, an L-shaped rod is connected to the push plate, and the L-shaped rod is connected to the control board through the No. A control block is arranged above the control board.

Further, a limit bar is arranged inside the casing, and a limit slot for limiting the position of the sliding door is formed between the limit bar and the rear wall of the dust box, and a limit groove is formed between the limit bar and the rear wall of the dust collecting box, and the sliding door is close to a side of the casing. A No. 2 spring is arranged on the side, and the other end of the No. 2 spring is connected with the inside of the housing to reset the sliding door.

Compared with the prior art, the present invention has the following advantages:

1. The present invention realizes automatic reversal through the relative displacement of the casing relative to the sliver and the mounting plate, and realizes the left and right automatic reversal on the basis of mechanical dust collection, which increases the efficiency of wiping the blackboard;

2. The present invention is provided with a baffle plate that can be extended or retracted along with the automatic reversing to assist the dust to fall into the receiving part, thereby improving the dust collection effect.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural schematic diagram of the present invention without a casing and a dust collecting box;

3 is a schematic structural diagram of the present invention without a casing and a dust collecting box;

4 is a schematic structural diagram of the present invention after removing the top plate, the rear side wall and the right side wall of the casing;

Fig. 5 is the connection schematic diagram of the No. 2 swing rod and the mounting plate of the present invention;

Fig. 6 is the partial enlarged view of circle B in Fig. 4 of the present invention;

Fig. 7 is the structural representation of the push block of the present invention;

8 is a schematic structural diagram of a storage device of the present invention;

9 is a schematic structural diagram of a storage device of the present invention;

Fig. 10 is a partial enlarged view of circle A in Fig. 4 of the present invention;

Fig. 11 is the structural representation of the push rod of the present invention;

Among them, the shell-1, the dust box-2, the No.1 rotating shaft-3, the No.2 rotating shaft-4, the No.2 fixed shaft-5, the No.2 swing rod-6, the No.1 swing rod-7, the mounting plate-8, Cotton sliver - 9, No. 1 sliding rod - 10, No. 1 U-shaped piece - 11, L-shaped rod - 12, Limit ring - 13, Receiver - 14, Limit block - 15, No. 1 bevel gear - 16, No. 2 bevel gear - 17, brush - 18, No. 1 fixed shaft - 19, T-connector - 20, No. 1 chute - 21, No. 2 U-shaped piece - 22, No. 2 sliding rod - 23, baffle -24, No.2 chute-25, positioning plate-26, No.1 spring-27, No.3 shaft-28, shaft hole-29, push block-30, limit plate-31, storage device-32, storage box -33, push rod-34, cross limiter-35, cotton layer-36, plastic layer-37, iron layer-38, limit port-39, rotating cavity-40, through hole-41, storage box- 42. Transition box-43, bracket-44, control board-45, push plate-46, sliding door-47, screw-48, No. 3 chute-49, connecting column-50, roller-51, No. 4 chute -52, control block -53, limit bar -54, limit groove -55, No. 2 spring -56, plug -57, plunger rod -58, cylinder -59, sensing bump -60, push handle -61 .

Detailed ways

In order to further illustrate the technical solutions of the present invention, the present invention will be further described below through examples.

As shown in Figures 1 to 11, an automatic reversing dust collecting blackboard eraser includes a housing 1, a working mechanism and a dust collecting box 2. The working mechanism includes a No. 1 rotating shaft 3, a No. 2 rotating shaft 4 and a No. 2 rotating shaft Fixed shaft 5, the two ends of the No. 1 rotating shaft 3 are respectively rotatably arranged on the top plate and the bottom plate of the housing 1, and the upper and lower parts of the No. 1 rotating shaft 3 are respectively fixed with a No. 2 swing rod 6 and a No. 1 swing rod. No. 2 swing rod 7, the other end of the No. 2 swing rod 6 is connected to a mounting plate 8 through the front wall of the housing 1, and the back of the mounting plate 8 is fixedly connected with a No. 3 rotating shaft 28. On the No. 2 swing rod 6 is provided with a shaft hole 29 for installing the No. 3 rotating shaft 28, the No. 3 rotating shaft 28 is arranged in the shaft hole 29, and a 20-degree opening is opened on the shaft hole 29 for the No. 3 rotating shaft 28 and installation. The plate 8 is connected and limits the rotation angle of the mounting plate 8 . A cotton sliver 9 is arranged on the mounting plate 8 , the other end of the No. 1 swing rod 7 is a hollow structure, and a No. 1 sliding rod 10 is arranged in the hollow structure of the No. 1 swing rod 7 . The other end of the 10 is hinged to the middle of the No. 1 U-shaped piece 11, the No. 2 rotating shaft 4 is arranged through the two ends of the No. 1 U-shaped piece 11, and two limit rings are arranged on the No. 2 rotating shaft 4 13. In order to limit the movement of the No. 1 U-shaped piece 11 relative to the No. 2 rotating shaft 4, the two ends of the No. 2 rotating shaft 4 are rotatably arranged on the left and right side walls of the receiving member 14, and the bottom of the receiving member 14 is inclined and arranged, The receiving member 14 is arranged at the bottom of the front surface of the housing 1, and a rubber edge is arranged on the front side of the receiving member 14. The No. 2 fixed shaft 5 is fixedly arranged on the front surface of the housing 1, and the No. The fixed shaft 5 is located under the mounting plate 8, and a No. 1 bevel gear 16 is rotatably provided on the No. 2 fixed shaft 5. The edge of the No. 1 bevel gear 16 is flush with the front surface of the sliver 9. Two No. 2 bevel gears 17 corresponding to the No. 1 bevel gear 16 are fixedly arranged on the No. 2 rotating shaft 4 , the two No. 2 bevel gears 17 are arranged oppositely, and two sides of the No. 2 rotating shaft 4 are fixedly arranged with A brush 18, the dust collecting box 2 is a box body with an open front surface, the dust collecting box 2 is located at the front end of the inner side of the bottom plate of the housing 1, and communicates with the receiving member 14, and is arranged inside the dust collecting box 2 There is a push block 30, the two sides of the dust collecting box 2 are opened, and a limit plate 31 and a storage device 32 are respectively provided at the openings on both sides. A push rod 34 is movably arranged in the box 33, and the push rod 34 includes a cylinder 59, a plunger rod 58, a plug 57 and a push handle 61, and the plug 57 and the push handle 61 are respectively arranged at both ends of the plunger rod 58, and The plug 57 is located inside the cylinder 59 , a cross limiter 35 is provided at the front end of the cylinder 59 , the end of the cross limiter 35 is an injection hole, and the plunger rod 58 is evenly provided with a plurality of Sensing bumps 60, a circle of corresponding sensing bumps 60 is annularly arranged in the middle of the inner wall of the cylinder wall, the sensing bumps 60 are elastic materials, such as rubber, and the cross limiter 35 of the push rod 34 can penetrate The over-limiting plate 31 is connected with the push block 30 . A cross limiter 35 is provided at the front end of the push rod 34. The push block 30 is sequentially composed of a cotton cloth layer 36, a plastic layer 37 and an iron block layer 38. The cotton cloth layer 36 is used for direct contact with dust. The outer side of the iron block layer 38 is provided with a limit opening 39, the inner side of the iron block layer 38 is provided with a rotating cavity 40 that communicates with the limit opening 39, and the plastic layer 37 is provided with a cross limit for accommodating The through hole 41 at the end of the component 35; the limiting plate 31 is a magnet. The storage device 32 includes 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 housing 1, and the transition The box 43 communicates with the dust collecting box 2, the storage box 42 is movably placed on the bracket 44, and communicates with the transition box 43. A screw 48 is threadedly connected to one of the side walls of the bracket 44 for the transition box. 43 is fixed, a No. 3 chute 49 is provided on the transition box 43 near the storage box 42, and a sliding door 47 is provided in the No. 3 chute 49, and the sliding door 47 can slide into the housing 1 Inside, a connecting column 50 is provided on the side of the upper surface of the sliding door 47 away from the housing 1 , a roller 51 is provided on the connecting column 50 , and a No. 4 chute 52 is provided on the upper surface of the transition box 43 , the control board 45 is arranged above the transition box 43, the width of the control board 45 is the same as the width of the transition box 43, and the control board 45 controls the side edge of the connecting column 50 to be inclined, and the push plate 46 is set The transition box 43 is connected to the control board 45 through the No. 4 chute 52 , and a control block 53 is arranged above the control board 45 . A limiting bar 54 is arranged inside the housing 1 , and a limiting groove 55 for limiting the sliding door 47 is formed between the limiting bar 54 and the rear wall of the dust collecting box 2 . One side of the housing 1 is provided with a No. 2 spring 56 , and the other end of the No. 2 spring 56 is connected to the interior of the housing 1 to reset the sliding door 47 . The front wall of the housing 1 is provided with an opening for the No. 2 swing rod 6 and No. 1 sliding rod 10 to move. A fixed shaft 19 is also fixedly arranged inside the housing 1 , a T-shaped connector 20 is rotatably arranged on the first fixed shaft 19 , and a No. 1 is arranged on the front of the T-shaped connector 20 . In the chute 21, a No. 2 U-shaped piece 22 is arranged in the No. 1 chute 21. The two ends of the No. 2 U-shaped piece 22 are fixedly connected with the No. 1 rotating shaft 3. The left and right sides of the T-shaped connecting piece 20 are Both ends are hollow structures, a No. 2 sliding rod 23 is arranged in the hollow structure of the T-shaped connector 20, and the other end of the No. 2 sliding rod 23 is hinged on the baffle plate 24, and the baffle plate 24 is arranged on the The second chute 25 on the left and right side walls of the housing 1 is used to block dust so that the dust falls on the receiving member 14 . A cotton cloth is arranged on the front side of the baffle 24 to prevent the baffle 24 from being damaged by hard contact friction between the baffle 24 and the blackboard, and at the same time, the blackboard can be wiped twice. A positioning plate 26 is arranged on the inner side of the No. 2 chute 25 to restrict the baffle 24 to move only in the No. 2 chute 25; a position limiter is provided on the No. 2 sliding rod 23 near the baffle 24 Block 15, a No. 1 spring 27 is sleeved on the No. 2 sliding rod 23, and the No. 1 spring 27 is located between the limit block 15 and the T-shaped connecting piece 20 to assist the No. 2 sliding rod 23 to extend.

Working principle: Use cotton sliver to wipe the blackboard. When in use, since the No. 1 rotating shaft 3 is rotatably installed in the casing 1, the casing 1 will rotate relative to the mounting plate 8 until the No. 2 swing rod 6 touches the side of the opening At the same time, the No. 1 swing rod 7 will also rotate with the No. 1 rotating shaft 3, and finally drive the corresponding No. 2 bevel gear 17 to mesh with the No. 1 bevel gear 16. Specifically, when the mounting plate 8 is biased to the right side of the housing 1 , the No. 2 swing rod 6 simultaneously drives the No. 2 bevel gear 17 on the left to mesh with the No. 1 bevel gear 16, wipe the blackboard from right to left, and look down on the No. 1 bevel gear 16, which turns clockwise. The No. 1 bevel gear 16 The No. 2 rotating shaft 4 is driven to rotate by the No. 2 bevel gear 17, and finally the brush 18 is driven to brush the dust into the dust collecting box 2. When the dust is collected, the push rod 34 is taken out and extended into the push block 30, and rotated at a certain angle, so that the dust is collected. The push rod 34 can either push out the push block 30 or pull back the push block 30, push the plunger rod 58 to move a distance of a sensing bump, and a certain amount of water flows out of the injection hole to soak the cotton cloth layer 36, and then push the push block 30 to move it. The dust is pushed into the transition box 43, and the dust is squeezed into blocks through the soaked cotton cloth layer 36, and then the push block 30 is retracted, the push rod 34 is put back into the storage box 33, and the control block is pushed along the fourth chute 52. 53 moves the control panel 45, the inclined end of the control panel 45 propels the sliding door 47, then the push panel 46 pushes the compressed dust into the storage box 42, pushes the control block 53 back to reset the control panel 45, and the sliding door 47 Under the action of the No. 2 spring 56, it automatically resets, and the storage box 42 is closed.

While the main features and advantages of the present invention have been shown and described above, it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but can, without departing from the spirit or essential characteristics of the present invention, be The present invention may be implemented in other specific forms. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

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).

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