CN114368242A

CN114368242A - Dust-absorbing blackboard eraser

Info

Publication number: CN114368242A
Application number: CN202210108340.0A
Authority: CN
Inventors: 张永康; 仲云; 沈杰; 贺旭; 吕艳; 赵佳利
Original assignee: Suzhou Vocational University
Current assignee: Suzhou Vocational University
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-04-19

Abstract

The invention provides a novel dust collection blackboard eraser which comprises a blackboard eraser main body and a detachable dust collection box inserted into the blackboard eraser main body, wherein the blackboard eraser main body consists of a brush plate and a shell sleeved above the brush plate, a box bin for inserting the dust collection box is arranged in the middle of the top surface of the brush plate, dust collection holes are further formed in the brush plate, a left driving assembly and a right driving assembly for enabling negative pressure to be generated in the box bin are arranged on the left side and the right side of the box bin, the left driving assembly and the right driving assembly are arranged in central symmetry relative to the box bin, and the dust collection holes are communicated with the box bin through dust collection pipelines. The invention solves the problems of disordered wind direction, insufficient dust collection force and special requirements on the wiping direction in the existing device, and has the advantages of simple structure, unlimited wiping direction, sufficient power, convenient use, no requirements on the use habit of an operator and no difference from the common blackboard eraser in use.

Description

Dust-absorbing blackboard eraser

Technical Field

The invention relates to the technical field of teaching equipment, in particular to a novel dust-absorbing blackboard eraser.

Background

In the teaching process, although many schools are equipped with white boards and white board pens, chalks are still irreplaceable in the teaching industry at present, most of the current schools are blackboard erasers without dust collection function, and a large amount of dust is diffused into the air in the wiping process, so that the physical health of teachers and students is threatened.

The prior dust-absorbing blackboard eraser device adopts a power wheel to drive a gear to transmit and absorbs dust through a fan, the device has strict regulation on the wiping direction when wiping the blackboard, and can play a role of absorbing dust to a certain extent only when wiping the blackboard according to the set direction, otherwise, the dust can be accelerated to fly, 4 dust-absorbing fans are arranged side by side, no dust-absorbing passage causes the disorder of the internal wind direction, the dust-absorbing force is insufficient, and the dust-collecting position, the power wheel steering and the supporting mode of the device are not clearly alternated in the patent, so that the dust-absorbing effect is difficult to verify, and certain problems can be caused in the implementation process. In view of the above reasons, a novel dust absorption blackboard eraser is invented.

Disclosure of Invention

In order to solve the problems, the invention discloses a novel dust-absorption blackboard eraser, which solves the problems of disordered wind direction, insufficient dust absorption force and special requirements on a wiping direction in the conventional device, and has the advantages of simple structure, no limitation on the wiping direction, sufficient power, convenience in use, no requirements on the use habit of an operator and no difference from the common blackboard eraser in use.

The specific scheme is as follows:

a novel dust absorption blackboard eraser which is characterized in that: including blackboard eraser main part and the collection powder box of detachable cartridge in blackboard eraser main part, the blackboard eraser main part is established the shell of its top by brush board and cover and is constituteed, and wherein, the top surface middle part of brush board is equipped with the powder box storehouse that is used for cartridge collection powder box, has still arranged the dust absorption hole on the brush board, the left and right sides in powder box storehouse is equipped with left drive assembly and the right drive assembly who is used for letting its inside negative pressure that produces, left drive assembly and right drive assembly are central symmetry setting about powder box storehouse, the dust absorption hole passes through dust absorption pipeline and powder box storehouse intercommunication.

As a further improvement of the invention, the left driving component comprises an air suction cavity A, the air suction cavity A consists of a pipe body A and a connector A which are arranged on the left and right, wherein the pipe body A is transversely arranged, a horizontally arranged fixing rod A is arranged in the right end of the pipe body A along the radial direction, the right end of the connector A is connected with the left side surface of the powder box bin and is communicated with the inner cavity of the connector A, semicircular one-way valve plates A with arc edges capable of turning towards the left end of the pipe body A are arranged on the upper and lower sides of the fixing rod A in a matching way, the one-way valve plates A are connected with a torsion spring A at the end part of the fixing rod A in a matching way, a shaft D is arranged in the middle of the pipe body A along the axial direction, a multi-stage fan A and a bevel gear K are arranged on the shaft D, wherein the multi-stage fan A is arranged in the pipe body A, the bevel gear K is arranged outside the left end of the pipe body A, and the left end of the shaft D is rotatably arranged in the blackboard eraser body, a gear L, a non-return driving piece D, a bevel gear I, a non-return driving piece A and a gear I are sequentially arranged above the pipe body A from top to bottom through a shaft B, the upper end of the shaft B is connected with the shell, the bevel gear I is meshed with a bevel gear K, a ratchet groove D and a ratchet groove A are respectively arranged in the middle of the top surface and the bottom surface of the bevel gear I, the ratchet groove D and the ratchet groove A are identical, the non-return driving piece D and the non-return driving piece A are respectively and rotatably arranged in the ratchet groove D and the ratchet groove A, pawls D capable of being matched with the ratchet groove D are arranged at two ends of the non-return driving piece D, pawls A capable of being matched with the ratchet groove A are arranged at two ends of the non-return driving piece A, power wheel A assemblies and power wheel D assemblies are arranged at the front side and the back side of the pipe body A, the power wheel A assemblies are composed of two power wheels A which are symmetrically arranged front and back, the middles of the two power wheels A are connected through a shaft F, a bevel gear A is arranged in the power wheel A at the front side, a gear A and a bevel gear E which are arranged up and down are arranged above the power wheel A component through a shaft A, the lower end of the shaft A is connected with a rotary buckle sleeved outside the middle part of the shaft F, the bevel gear A is meshed with the bevel gear E, the power wheel assembly D consists of two power wheels D which are symmetrically arranged front and back, the middle parts of the two power wheels D are connected through a shaft F, a bevel gear D is arranged in the power wheel D at the rear side, a gear D and a bevel gear H which are arranged up and down are arranged above the power wheel D assembly through a shaft A, the bevel gear D is meshed with the bevel gear H, the gear A is lower than the bevel gear I, and is in transmission connection with a gear I through a gear E, the gear D is higher than the bevel gear I and is in transmission connection with a gear L through a gear H, and shafts C are respectively arranged in the middle of the gear E and the gear H.

As a further improvement of the invention, the right driving component comprises an air suction cavity B, the air suction cavity A is the same as the air suction cavity A and consists of a pipe body B and a connecting body B, a fixing rod A, a one-way valve plate A and a torsion spring A are arranged in the air suction cavity A, the middle part of the pipe body B is provided with a shaft E along the axis direction, the shaft E is provided with a multistage fan B and a bevel gear L, a gear J, a non-return driving piece B, a bevel gear J, a non-return driving piece C and a gear K are sequentially arranged above the pipe body B from top to bottom through the shaft B, the bevel gear J is meshed with the bevel gear L, the middle parts of the top surface and the bottom surface of the bevel gear J are respectively provided with a ratchet groove B and a ratchet groove C, the two ends of the non-return driving piece B are provided with pawls B, the two ends of the non-return driving piece C are provided with pawls C, the front side and the rear side of the pipe body B are provided with a power wheel B component and a power wheel C component, the power wheel B component consists of two power wheels B which are symmetrically arranged in front and rear side, the middle of the two power wheels B is connected through a shaft F, a bevel gear B is arranged in the front side power wheel B, a gear B and a bevel gear F which are arranged up and down are arranged above the power wheel B assembly through the shaft A, the bevel gear B is meshed with the bevel gear F, the power wheel C assembly is composed of two power wheels C which are symmetrically arranged front and back, the middle of the two power wheels C is connected through the shaft F, a bevel gear C is arranged in the rear side power wheel C, a gear C and a bevel gear G which are arranged up and down are arranged above the power wheel C assembly through the shaft A, the bevel gear C is meshed with the bevel gear G, the gear C is lower than the bevel gear J and is in transmission connection with the gear K through the gear G, and the gear B is higher than the bevel gear J and is in transmission connection with the gear J through the gear F.

As a further improvement of the invention, a sealing ring A is arranged on the inner side of the right end of the pipe body A, a dust filter net A is arranged on the right end of the connector A, a sealing ring A is arranged on the inner side of the left end of the pipe body B, and a dust filter net C is arranged on the left end of the connector B.

As a further improvement of the invention, the powder box bin is of a square barrel-shaped structure with an opening at the upper end and consists of an inner layer framework and an outer layer shell, the outer layer shell is higher than the inner layer framework, an interlayer is arranged between the inner layer framework and the outer layer shell, the lower parts of the left side and the right side of the powder box bin are symmetrically provided with an air outlet B and an air outlet A which are matched with the air suction cavity B, the upper part of the side wall is provided with a dust inlet, the inner side of the upper end of the inner layer framework is provided with a movable buckle, and an inclined plate is arranged between the upper end of the inner layer framework and the upper end of the outer layer shell.

As a further improvement of the invention, the middle part of the top surface of the shell is provided with a jack for inserting the powder collecting box, the upper end of the powder collecting box is provided with a rubber plug which can be in interference fit with the jack, the upper end of the rubber plug is provided with a pull ring, the upper end of the side wall of the powder collecting box is provided with a rectangular opening, the side wall is provided with a dust filter screen B at a position corresponding to the air outlet, the upper end of the powder collecting box is internally provided with a sealing ring B, the sealing ring B is lower than the rectangular opening, a longitudinally arranged fixing rod B is supported in the middle of the sealing ring B, the left side and the right side of the fixing rod B are symmetrically provided with one-way valve plates B, the outer ends of which can be turned downwards, and the one-way valve plates B are in fit connection with a torsion spring B arranged at the end part of the fixing rod B.

As a further improvement of the invention, the bottom surface of the brush plate is provided with a brush, the left side and the right side are respectively provided with five dust collection holes along the longitudinal direction, the middle parts of the front side and the rear side are respectively provided with two dust collection holes along the transverse direction, wherein the dust collection holes on the left side and the right side are connected with the left dust inlet hole and the right dust inlet hole of the powder box bin through respective dust collection pipelines A, and the dust collection holes on the front side and the rear side are connected with the front dust inlet hole and the rear dust inlet hole of the powder box bin through respective dust collection pipelines B.

As a further improvement of the invention, the brush plate is provided with four power wheel holes which correspond to and are matched with the power wheel A assembly, the power wheel B assembly, the power wheel C assembly and the power wheel D assembly in position.

The invention has the beneficial effects that:

1. the fan is driven to suck dust through gear transmission by depending on the rotation of the power wheel, no additional power is needed, and the environment-friendly and energy-saving effects are achieved.

2. The power wheel can rotate around the corresponding shaft A through the rotating buckle, the cleaning direction is not limited, the fan is always in a dust collection state during cleaning, and the use is convenient.

3. Power wheel A and power wheel C, power wheel B and two liang of cooperations of power wheel D drive the fan and carry out the dust absorption, when arbitrary transmission goes wrong, if: the power wheel on the left side is emptied, and the power wheel on the right side is pressed on the surface of the blackboard, so that the device can still absorb dust.

4. By adopting the inertia design of the idler wheel, when the power wheel stops rotating, the fan is still in a suction state due to the inertia effect, and the good dust collection effect is ensured.

5. The blackboard eraser has no limitation on the use habit of an operator, and has no difference with a common blackboard eraser in use.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic view of the present invention with the outer shell and the compact removed.

Fig. 3 is a schematic view of fig. 2 with the dust suction duct a and the dust suction duct B removed.

FIG. 4 is a schematic view of the left and right drive assemblies of the present invention.

Fig. 5 is a bottom view of fig. 4.

Fig. 6 is a schematic view of fig. 5 with the multi-stage fan a and the multi-stage fan B removed.

Fig. 7 is a schematic view of the suction chamber a and the suction chamber B.

Fig. 8 is a schematic view of the internal structure of the suction chamber a or the suction chamber B.

Fig. 9 is an enlarged schematic view of the torsion spring a in the suction chamber a or the suction chamber B.

Fig. 10 is a schematic view of a cartridge magazine.

Fig. 11 is a schematic view of the inner inclined plate of the powder box.

Fig. 12 is a top view of the magazine.

Fig. 13 is a cross-sectional view of a-a' in fig. 12.

Figure 14 is a schematic view of a dust bin.

Fig. 15 is a schematic view of fig. 14 with the rubber stopper removed.

Fig. 16 is an enlarged view of the torsion spring B inside the powder collecting box.

FIG. 17 is a schematic view of a brush.

FIG. 18 is a schematic view of a dust extraction aperture.

List of reference numerals:

1-power wheel A, 11-bevel wheel A, 12-bevel wheel E, 13-gear A, 14-gear E, 15-gear I, 16-ratchet drive A, 17-pawl A, 18-ratchet groove A, 2-power wheel B, 21-bevel wheel B, 22-bevel wheel F, 23-gear B, 24-gear F, 25-gear J, 26-ratchet drive B, 27-pawl B, 28-ratchet groove B, 3-power wheel C, 31-bevel wheel C, 32-bevel wheel G, 33-gear C, 34-gear G, 35-gear K, 36-ratchet drive C, 37-pawl C, 38-ratchet groove C, 4-power wheel D, 41-bevel wheel D, 42-bevel wheel H, 43-gear D, 44-gear H, 45-gear L, 46-non-return driving piece D, 47-pawl D, 48-ratchet groove D, 5-bevel gear I, 51-bevel gear K, 52-multistage fan A, 521-shaft D, 53-air suction cavity A, 531-dust filter net A, 532-one-way valve plate A, 533-torsion spring A, 534-fixing rod A, 535-sealing ring A, 6-bevel gear J, 61-bevel gear L, 62-multistage fan B, 621-shaft E, 63-air suction cavity B, 631-dust filter net C, 7-shell, 71-rubber plug, 72-pull ring, 73-dust collecting box, 731-dust filter net B, 732-torsion spring B, 733-one-way valve plate B, 734-sealing ring B, 735-fixed rod B, 74-powder box bin, 741-dust inlet hole, 742-air outlet A, 7421-air outlet B, 743-inner layer framework, 744-interlayer, 745-outer layer shell, 746-movable buckle, 747-sloping plate, 75-dust suction pipeline A, 751-dust suction pipeline B, 76-shaft A, 761-rotary buckle, 762-shaft F, 77-shaft B, 78-shaft C, 8-hairbrush plate, 81-hairbrush and 82-dust suction hole.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.

As shown in the figure, a novel dust collection blackboard eraser, including blackboard eraser main part and the collection powder box 73 of detachable cartridge in blackboard eraser main part, blackboard eraser main part comprises brush board 8 and cover shell 7 of establishing its top, wherein, the top surface middle part of brush board 8 is equipped with the powder box storehouse 74 that is used for cartridge collection powder box 73, dust absorption hole 82 has still been arranged on brush board 8, the left and right sides in powder box storehouse 74 is equipped with left drive assembly and the right drive assembly that is used for letting its inside negative pressure that produces, left drive assembly and right drive assembly are central symmetry setting about powder box storehouse 74, dust absorption hole 82 is through dust absorption pipeline and powder box storehouse 74 intercommunication.

In this embodiment, the left driving assembly includes an air suction chamber a53, the air suction chamber a53 is composed of a tube a and a connector a, the tube a is horizontally disposed, a horizontally disposed fixing rod a534 is installed in the right end of the tube a along the radial direction, the right end of the connector a is connected with the left side surface of the powder box 74 and is communicated with the inner cavity of the connector a, the upper and lower sides of the fixing rod a534 are cooperatively provided with a semicircular check valve plate a532, the arc edge of which can be turned over to the left end of the tube a, the check valve plate a532 is cooperatively connected with a torsion spring a533 at the end of the fixing rod a534, the middle of the tube a is provided with a shaft D521 along the axial direction, the shaft D521 is provided with a multistage fan a52 and a bevel gear K51, wherein the multistage fan a52 is disposed in the tube a, the bevel gear K51 is disposed outside the left end of the tube a, the left end of the shaft D521 is rotatably installed in the blackboard eraser body, and a gear L45, a gear L45, a connector and a connector are sequentially installed above the tube a from top to bottom via a 77, A non-return driving piece D46, a bevel gear I5, a non-return driving piece A16 and a gear I15, the upper end of a shaft B77 is connected with a housing 7, the bevel gear I5 is meshed with a bevel gear K51, the middle parts of the top surface and the bottom surface are respectively provided with a ratchet groove D48 and a ratchet groove A18, wherein, the ratchet groove D48 and the ratchet groove A18 are same, the non-return driving piece D46 and the non-return driving piece A16 are respectively rotatably arranged in the ratchet groove D48 and the ratchet groove A18, the two ends of the non-return driving piece D46 are provided with a pawl D46 which can be matched with the ratchet groove D46, the two ends of the non-return driving piece A46 are provided with a pawl A46, the front and the rear sides of a pipe body A are provided with a power wheel A assembly and a power wheel D assembly, the power wheel A assembly is composed of two power wheels A46 which are symmetrically arranged in front and rear, the middle parts of the two power wheels A46 are connected through a power shaft F762, the bevel gear E46 and the bevel gear E are arranged above the power wheel A46, the lower end of a shaft A76 is connected with a rotary buckle 761 sleeved outside the middle of a shaft F762, a bevel gear A11 is meshed with a bevel gear E12, a power wheel D assembly is composed of two power wheels D4 symmetrically arranged front and back, the middle of the two power wheels D4 is connected through the shaft F762, a bevel gear D41 is arranged in a rear power wheel D1, a gear D43 and a bevel gear H42 which are vertically arranged are arranged above the power wheel D assembly through a shaft A76, the bevel gear D41 is meshed with a bevel gear H42, the gear A13 is lower than the bevel gear I5 and is in transmission connection with the gear I15 through a gear E14, the gear D43 is higher than the bevel gear I5 and is in transmission connection with the gear L45 through a gear H44, and shafts C78 are respectively arranged in the middle of the gear E14 and the gear H44.

In this embodiment, the right driving assembly includes an air suction cavity B63, the air suction cavity a53 is the same as the air suction cavity a53, and is composed of a tube B and a connection B, a fixing rod a534, a one-way valve plate a532, and a torsion spring a533 are arranged inside, a shaft E621 is arranged in the middle of the tube B along the axis direction, a multistage fan B62 and a bevel gear L61 are installed on the shaft E621, a gear J25, a non-return driving member B26, a bevel gear J6, a non-return driving member C36, and a gear K35 are sequentially installed above the tube B from top to bottom through the shaft B77, the bevel gear J6 is engaged with the bevel gear L61, a ratchet groove B28 and a ratchet groove C38 are respectively installed in the middle of the top surface and the bottom surface of the tube B, non-return driving members B27 are installed at both ends of the non-return driving member C36, a power wheel B assembly and a power wheel C assembly are installed at both front and back sides of the tube B, the power wheel B2 are symmetrically installed at both front and back, and a middle of the tube B762 is connected through a shaft F762, a bevel gear B21 is arranged in a front power wheel B1, a gear B23 and a bevel gear F22 which are arranged up and down are arranged above a power wheel B assembly through a shaft A76, the bevel gear B21 is meshed with the bevel gear F22, a power wheel C assembly is composed of two power wheels C3 which are symmetrically arranged front and back, the middle of each power wheel C3 is connected through a shaft F762, a bevel gear C31 is arranged in a rear power wheel C3, a gear C33 and a bevel gear G32 which are arranged up and down are arranged above the power wheel C assembly through a shaft A76, the bevel gear C31 is meshed with a bevel gear G32, the gear C33 is lower than the bevel gear J6 and is in transmission connection with a gear K35 through a gear G34, and the gear B23 is higher than the bevel gear J6 and is in transmission connection with a gear J25 through a gear F24.

In this embodiment, a sealing ring a535 is disposed at the inner side of the right end of the pipe body a, a dust filter a531 is disposed at the right end of the connector a, a sealing ring a535 is disposed at the inner side of the left end of the pipe body B, and a dust filter C631 is disposed at the left end of the connector B.

In this embodiment, the compact case 74 is a square barrel-shaped structure with an open upper end, and is composed of an inner layer skeleton 743 and an outer layer shell 745, the outer layer shell 745 is higher than the inner layer skeleton 743, an interlayer 744 is arranged between the inner layer skeleton 743 and the outer layer shell 745, the lower parts of the left side and the right side of the compact case 74 are symmetrically provided with an air outlet B7421 and an air outlet a742 which are matched with the air suction cavity B63 and 53, the upper part of the side wall is provided with a dust inlet 741, the inner side of the upper end of the inner layer skeleton 743 is provided with a movable buckle 746, and an inclined plate 747 is arranged between the upper end of the inner layer skeleton 743 and the upper end of the outer layer shell 745.

In this embodiment, the middle of the top surface of the housing 7 is provided with a jack for inserting the powder collecting box 73, the upper end of the powder collecting box 73 is provided with a rubber plug 71 capable of being in interference fit with the jack, the upper end of the rubber plug 71 is provided with a pull ring 72, the upper end of the side wall of the powder collecting box 73 is provided with a rectangular opening, a dust filter net B731 is arranged at the position corresponding to the air outlet 742 on the side wall, the upper end of the powder collecting box 73 is provided with a sealing ring B734, the sealing ring B734 is lower than the rectangular opening, a longitudinally-arranged fixing rod B735 is supported in the middle of the fixing rod B735, two lateral sides of the fixing rod B735 are symmetrically provided with a one-way valve plate B733, the outer end of which can be turned downwards, and the one-way valve plate B733 is matched and connected with a torsion spring B732 arranged at the end of the fixing rod B735.

In this embodiment, the bottom surface of the brush plate 8 is provided with a brush 81, the left and right sides are provided with five dust suction holes 82 along the longitudinal direction, and the middle parts of the front and rear sides are provided with two dust suction holes 82 along the transverse direction, wherein the dust suction holes 82 of the left and right sides are connected with the left and right dust inlet holes 741 of the powder box chamber 74 through respective dust suction pipes a75, and the dust suction holes 82 of the front and rear sides are connected with the front and rear dust inlet holes 741 of the powder box chamber 74 through respective dust suction pipes B751.

In this embodiment, the brush plate 8 is provided with four power wheel holes corresponding to and matching with the power wheel a assembly, the power wheel B assembly, the power wheel C assembly and the power wheel D assembly.

The working principle of the invention is as follows:

1. in an initial state (the powder collecting box 73 is positioned inside the powder box bin 74 and is clamped by a movable buckle 746 in the powder box bin 74, the rubber plug 71 above is in interference fit with the shell 7, a powder collecting bag (only air can pass through a powder collecting belt and dust cannot pass through the powder collecting bag) is sleeved inside the powder collecting box 73, a rope of the powder collecting bag is bound with the powder collecting box, a dust filter screen C731 is aligned with the air outlet 742, a one-way valve plate B733 inside the powder collecting box 73 is tightly contacted with a sealing ring B734 under the action of a torsion spring B732, a dust filter screen A531 on the air suction cavity 53 is also aligned with the air outlet 742, the one-way valve plate A532 is tightly contacted with a sealing ring A (535) inside the air suction cavity 53 under the action of a torsion spring A533, a multistage fan A52 and a multistage fan B62 are respectively connected with the air suction cavity A53 and the air suction cavity B (63) through a shaft D (521) and a shaft E (621) and are respectively and fixedly connected with a bevel gear K51 and a bevel gear L61 respectively, a bevel gear 11 and a bevel gear B21 and B21 are fixedly connected with a bevel gear L61, Bevel gears C31 and D41 are respectively fixedly connected with power wheels A1, B2, C3 and D4 through shafts F (762) and with bevel gears E12, F22, G32 and H42, gears A13, B23, C33 and D43 are respectively fixedly connected with bevel gears E12, F12, G12 and H12 through shafts A76 and with gears E (14, F12, G12) and H12, gears I12, J12, K12 and L12 are respectively connected with a non-return driving member A12, B12, C12 and D12, and are respectively connected with gears E (14, F12, G12), H12, pawls A12, B12, pawls C12, D12, C12, D12 and 12A 12 are respectively connected with ratchet drives C, D12 and D12, and 12 are respectively connected with ratchet drives C12, D12 and

12A

12 and 12 are respectively connected with pawls A12 and 12, The ratchet groove B28, the ratchet groove C38 and the ratchet groove D48 are engaged; ratchet grooves A18 and D48, ratchet grooves B28 and C38 are respectively positioned on two surfaces of a bevel gear I5 and a bevel gear J6, the bevel gear I5 and the bevel gear J6 are respectively meshed with a bevel gear K51 and a bevel gear L61, a brush 81 is fixedly connected with a brush plate 8, a power wheel A1, a power wheel B2, a power wheel C3 and a power wheel D4 are respectively connected with a shaft A76 through a rotating buckle 761, a powder box cabin 74 is composed of an inner layer framework 743 and an outer layer 745, a space interlayer 744 is arranged around the inner layer framework 743 and the outer layer 745, the upper part of the space interlayer is sealed through a sloping plate (747), air outlets 742A and B (7421) with the same size are reserved on two sides of the outer layer 745, the air outlets A742 and B7421 are aligned and symmetrical, the other two sides of the powder box cabin 74 are sealed), a hand-held shell 7 is held, and the power wheel A1, the power wheel B2, the power wheel C3, the power wheel D4 and the brush 81 are in contact with the surface of the blackboard.

2. (hereinafter, the wiping direction is divided into left and right, the power wheel A1 and the power wheel B2 are specified to be positioned above, and when the multistage fan A52 sucks air, the bevel gear I5 rotates anticlockwise, when the multistage fan B62 sucks air, the bevel gear J6 rotates clockwise, the directions and the positions are only used for convenience of explanation.) when the blackboard eraser wipes left, the power wheel B2 and the power wheel D4 rotate forwards to drive the bevel gear B21 and the bevel gear D41 to rotate forwards, the bevel gear F22 and the bevel gear H42 rotate to drive the gear B23 to rotate clockwise and the gear D43 to rotate anticlockwise, the gear F24 and the gear H44 drive the gear J44 to rotate clockwise and the gear L44 to rotate anticlockwise, the ratchet B44 is driven by the non-return driving piece B44 and the non-return driving piece D44 to rotate clockwise and the ratchet D44 is locked with the ratchet B44 and the ratchet D44, thereby respectively driving the bevel gear J6 to rotate clockwise, the bevel gear I5 to rotate anticlockwise, the multistage fan B62 and the multistage fan A52 are driven by the bevel gear L61 and the bevel gear K51 to suck air (at the moment, the power wheel A1 and the power wheel C3 rotate positively, the bevel gear A11 and the bevel gear C31 rotate positively, the gear A13 is driven by the bevel gear E (12) and the bevel gear G32 to rotate clockwise and the gear C33 rotate anticlockwise, the gear E14 and the gear G34 are driven by the gear E15 and the gear G34 to rotate clockwise and the gear K35 rotates anticlockwise, the pawl A17 is driven by the non-return driving piece A16 and the non-return driving piece C36 to rotate clockwise around the shaft B77 and the pawl C37B 77, and the ratchet groove A18 and the pawl A17 are in the clockwise state and the ratchet groove C38 and the pawl C37 are in the anticlockwise state, so that the rotation of the bevel gear I5 and the bevel gear J6 is not interfered, and the powder box is driven by the air suction cavity 53 to rotate, The inside of the dust collecting box 73 is formed into a vacuum negative pressure state, the dust enters the dust suction pipeline A75 and the dust suction pipeline B751 through the dust suction hole 82 below the brush plate 8, the air in the powder collection box 73 passes through the dust filter B731 on the four sides of the powder collection box 73, the air outlet 742 on the two sides of the powder collection box 74, the dust filter A531 on the air suction cavity A53, the dust filter B631 on the air suction cavity B63, the air suction cavity A53 and the one-way valve plate 532 in the air suction cavity B63 in sequence and is discharged out of the device through the dust suction pipeline from the dust inlet hole 741 into the powder collection box 73, so that the separation of the dust and the air in the powder collection box 73 is realized, when the dust filter on the side surface of the powder collection box 73 is blocked due to excessive dust, the air can be discharged from other dust filters, then the powder is discharged out of the device through an air outlet 742, a dust filter net on the air suction cavity A53 and the air suction cavity B63 and a one-way valve plate A532 by a space interlayer 744 reserved between an inner layer framework 743 and an outer layer shell 745 of the powder box bin 74). In addition, the inclined plate 747 is used to seal the upper parts of the inner layer framework 743 and the outer layer shell 745 of the powder box bin 74, so that in the air suction process, dust enters the powder collecting box 74 through the inclined plate 747 and the one-way valve plate B733, so as to ensure that the dust is not accumulated at the dust inlet hole 741 above, and ensure that no secondary pollution is caused when the powder collecting box 74 is taken out.

3. When the blackboard eraser wipes rightwards, the power wheel A1 and the power wheel C3 rotate reversely, the transmission gear A13 between the bevel gear A11 and the bevel gear E12, the transmission gear C31 and the bevel gear G32 rotates anticlockwise, the gear C33 rotates clockwise, the gear E14 and the gear G34 drive the gear I15 to rotate anticlockwise, the gear K35 rotates clockwise, the non-return driving piece A16 and the non-return driving piece C36 drive the pawl A17 to rotate anticlockwise around the shaft B77 and the pawl C37 to rotate clockwise around the shaft B77, as the ratchet groove A18 and the pawl A17 are locked anticlockwise, the ratchet groove C38 and the pawl C37 are locked clockwise, the bevel gear I5 is driven to rotate anticlockwise and the bevel gear J6 rotates clockwise, the multi-stage fan A52 and the multi-stage fan B62 are driven by the bevel gear K51 and the bevel gear L61 to suck air (at this time, the power wheel B2 and the power wheel D4 rotate reversely, the power wheel D4, the power wheel is driven by the bevel gear 26, and the non-return driving piece B26, The ratchet drive D46 drives the pawl B27 to rotate counterclockwise around the shaft B77 and the pawl D47 to rotate clockwise around the shaft B77, so that the ratchet groove B28 and the pawl D47 are in the non-engaged state counterclockwise and the ratchet groove D48 and the pawl D47 are in the non-engaged state clockwise, and therefore the rotation of the bevel gear I5 and the bevel gear J6 is not interfered), and the dust passage is the same as described above. When dust in the dust collecting box 73 needs to be cleaned or treated, one hand holds the shell 7, the other hand pulls the pull ring 72 outwards, the dust collecting box 73 is separated from the device, then the rope of the dust collecting bag is untied, the dust collecting bag is thrown into the garbage can, a new dust collecting bag is bound again, and then the dust collecting box 73 is placed into the dust box bin 74 for continuous use.

It should be noted that: the power wheel A1 and the power wheel C3, the power wheel B2 and the power wheel D4 are two wheels on a diagonal line, when the blackboard eraser is used for wiping left, the power wheel B2 and the power wheel D4 provide power to drive a multi-stage fan to work, the power wheel A1 and the power wheel C3 do not drive the multi-stage fan to work, if only one of the power wheel B2 and the power wheel D4 drives the multi-stage fan to work (due to the fact that wiping is not standard, the other wheel is in a suspended state), it is assumed that only the power wheel D4 drives the multi-stage fan A52 to work, the power wheel B2 does not provide power, at the moment, the power wheel D4 drives the multi-stage fan A52 to suck air, and the one-way valve plate A532 at the position of the multi-stage fan B62 driven by the power wheel B2 is in a closed state, and vacuum negative pressure can still be formed inside the powder collection box 73.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.

Claims

1. A novel dust absorption blackboard eraser which is characterized in that: including collection powder box (73) of blackboard eraser main part and detachable cartridge in blackboard eraser main part, the blackboard eraser main part comprises shell (7) above it by brush board (8) and cover, and wherein, the top surface middle part of brush board (8) is equipped with powder box storehouse (74) that are used for cartridge collection powder box (73), has still arranged dust absorption hole (82) on brush board (8), the left and right sides in powder box storehouse (74) is equipped with left drive assembly and the right drive assembly who is used for letting its inside negative pressure that produces, left side drive assembly and right drive assembly are central symmetry setting about powder box storehouse (74), dust absorption hole (82) are through dust absorption pipeline and powder box storehouse (74) intercommunication.

2. The novel dust-absorbing blackboard eraser according to claim 1, characterized in that: the left driving assembly comprises an air suction cavity A (53), the air suction cavity A (53) consists of a pipe body A and a connector A which are arranged on the left and right, wherein the pipe body A is transversely arranged, a horizontally arranged fixing rod A (534) is installed in the right end of the pipe body A along the radial direction, the right end of the connector A is connected with the left side surface of the powder box bin (74) and communicated with the inner cavity of the connector A, semicircular one-way valve plates A (532) with arc-shaped edges capable of turning towards the left end of the pipe body A are installed on the upper side and the lower side of the fixing rod A (534) in a matching mode, the one-way valve plates A (532) are connected with torsion springs A (533) at the end parts of the fixing rod A (534) in a matching mode, a shaft D (521) is arranged in the middle of the pipe body A along the axial direction, a multistage fan A (52) and a bevel gear K (51) are installed on the shaft D (521), wherein the multistage fan A (52) is arranged in the pipe body A, and the bevel gear K (51) is arranged outside the left end of the pipe body A, the left end of the shaft D (521) is rotatably arranged in the blackboard eraser main body, a gear L (45), a non-return driving piece D (46), a bevel gear I (5), a non-return driving piece A (16) and a gear I (15) are sequentially arranged above the tube body A from top to bottom through a shaft B (77), the upper end of the shaft B (77) is connected with the shell (7), the bevel gear I (5) is meshed with a bevel gear K (51), the middle parts of the top surface and the bottom surface of the shaft are respectively provided with a ratchet groove D (48) and a ratchet groove A (18), wherein the ratchet groove D (48) and the ratchet groove A (18) are identical, the non-return driving piece D (46) and the non-return driving piece A (16) are respectively rotatably arranged in the ratchet groove D (48) and the ratchet groove A (18), and pawls D (47) capable of being matched with the ratchet groove D (48) are arranged at the two ends of the non-return driving piece D (46), pawls A (17) which can be matched with ratchet grooves A (18) are mounted at two ends of the non-return driving piece A (16), power wheel A assemblies and power wheel D assemblies are arranged at the front side and the rear side of the pipe body A, each power wheel A assembly is composed of two power wheels A (1) which are symmetrically arranged front and rear, the middles of the two power wheels A (1) are connected through a shaft F (762), a bevel gear A (11) is arranged in the front power wheel A (1), a gear A (13) and a bevel gear E (12) which are vertically arranged are mounted above the power wheel A assemblies through a shaft A (76), the lower end of the shaft A (76) is connected with a rotary buckle (761) which is sleeved outside the middle of the shaft F (762), the bevel gear A (11) is meshed with the bevel gear E (12), each power wheel D assembly is composed of two power wheels D (4) which are symmetrically arranged front and rear, and the middles of the two power wheels D (4) are connected through a shaft F (762), be located rear side power wheel D (1) and be equipped with bevel gear D (41), gear D (43) and bevel gear H (42) that set up from top to bottom are installed through axle A (76) to the top of power wheel D subassembly, bevel gear D (41) and bevel gear H (42) meshing, gear A (13) are less than bevel gear I (5) to be connected with gear I (15) transmission through gear E (14), gear D (43) are higher than bevel gear I (5) to be connected with gear L (45) transmission through gear H (44), axle C (78) are installed respectively to gear E (14) and gear H (44) middle part.

3. The novel dust-absorbing blackboard eraser according to claim 2, characterized in that: the right driving component comprises an air suction cavity B (63), the air suction cavity A (53) is the same as the air suction cavity A (53), and consists of a pipe body B and a connection B, a fixing rod A (534), a one-way valve plate A (532) and a torsion spring A (533) are arranged inside the air suction cavity A (53), the middle part of the pipe body B is provided with a shaft E (621) along the axis direction, the shaft E (621) is provided with a multistage fan B (62) and a bevel gear L (61), a gear J (25), a non-return driving piece B (26), a bevel gear J (6), a non-return driving piece C (36) and a gear K (35) are sequentially arranged above the pipe body B from top to bottom through a shaft B (77), the bevel gear J (6) is meshed with the bevel gear L (61), the middle parts of the top surface and the bottom surface of the pipe body B are respectively provided with a ratchet groove B (28) and a ratchet groove C (38), and pawls B (27) are arranged at two ends of the non-return driving piece B (26), pawls C (37) are mounted at two ends of the non-return driving piece C (36), power wheel B assemblies and power wheel C assemblies are arranged on the front side and the rear side of the pipe body B, each power wheel B assembly is composed of two power wheels B (2) which are symmetrically arranged front and rear, the middles of the two power wheels B (2) are connected through a shaft F (762), a bevel gear B (21) is arranged in the front side power wheel B (1), a gear B (23) and a bevel gear F (22) which are vertically arranged are mounted above each power wheel B assembly through a shaft a (76), the bevel gear B (21) is meshed with the bevel gear F (22), each power wheel C assembly is composed of two power wheels C (3) which are symmetrically arranged front and rear, the middles of the two power wheels C (3) are connected through a shaft F (762), a bevel gear C (31) is arranged in the rear side power wheel C (3), and a gear C (33) and a bevel gear G (G) which are vertically arranged are mounted above each power wheel C assembly through a shaft a (76) 32) The bevel gear C (31) is meshed with the bevel gear G (32), the gear C (33) is lower than the bevel gear J (6) and is in transmission connection with the gear K (35) through the gear G (34), and the gear B (23) is higher than the bevel gear J (6) and is in transmission connection with the gear J (25) through the gear F (24).

4. The novel dust-absorbing blackboard eraser according to claim 3, characterized in that: body A's right-hand member inboard is equipped with sealing washer A (535), and connector A's right-hand member is equipped with dust screen A (531), body B's left end inboard is equipped with sealing washer A (535), and connector B's left end is equipped with dust screen C (631).

5. The novel dust-absorbing blackboard eraser according to claim 1, characterized in that: the powder box bin (74) is of a square barrel-shaped structure with an upper end open and is composed of an inner layer framework (743) and an outer layer shell (745), the outer layer shell (745) is higher than the inner layer framework (743), an interlayer (744) is arranged between the inner layer framework (743) and the outer layer shell (745), air outlets B (7421) and A (742) matched with the inner layer framework (53) and the air suction cavity B (63) are symmetrically formed in the lower portions of the left side and the right side of the powder box bin (74), dust inlet holes (741) are formed in the upper portions of the side walls, movable buckles (746) are arranged on the inner side of the upper end of the inner layer framework (743), and inclined plates (747) are arranged between the upper end of the inner layer framework (743) and the upper end of the outer layer shell (745).

6. The novel dust-absorbing blackboard eraser according to claim 5, characterized in that: the top surface middle part of shell (7) is equipped with the jack that is used for cartridge collection powder box (73), the upper end of collection powder box (73) is equipped with but interference fit rubber buffer (71) in the jack, the upper end of rubber buffer (71) is equipped with pull ring (72), collection powder box (73) lateral wall upper end is equipped with the rectangle trompil, is equipped with dust filter net B (731) with the corresponding position department of air outlet (742) on the lateral wall, be equipped with sealing washer B (734) in collection powder box (73) upper end, sealing washer B (734) are less than the rectangle trompil, and it has vertical dead lever B (735) that sets up to support between them, the left and right sides symmetry of dead lever B (735) is equipped with outer end one-way valve plate B (733) that can turn downwards, one-way valve plate B (733) is connected with the torsional spring B (732) cooperation that sets up at dead lever B (735) tip.

7. The novel dust-absorbing blackboard eraser according to claim 5, characterized in that: the bottom surface of the brush plate (8) is provided with a brush (81), the left side and the right side are respectively provided with five dust suction holes (82) along the longitudinal direction, the middle parts of the front side and the rear side are transversely provided with two dust suction holes (82), wherein the dust suction holes (82) of the left side and the right side are connected with the left dust inlet hole (741) and the right dust inlet hole (741) of the powder box bin (74) through respective dust suction pipelines A (75), and the dust suction holes (82) of the front side and the rear side are connected with the front dust inlet hole (741) and the rear dust inlet hole of the powder box bin (74) through respective dust suction pipelines B (751).

8. The novel dust-absorbing blackboard eraser according to claim 3, characterized in that: and four power wheel holes which correspond to the power wheel A assembly, the power wheel B assembly, the power wheel C assembly and the power wheel D assembly in position and are matched with the power wheel A assembly, the power wheel B assembly, the power wheel C assembly and the power wheel D assembly are formed in the brush plate (8).