CN112606599B - Dust absorption type blackboard eraser is used in teaching based on centrifugal force - Google Patents
Dust absorption type blackboard eraser is used in teaching based on centrifugal force Download PDFInfo
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- CN112606599B CN112606599B CN202011579667.3A CN202011579667A CN112606599B CN 112606599 B CN112606599 B CN 112606599B CN 202011579667 A CN202011579667 A CN 202011579667A CN 112606599 B CN112606599 B CN 112606599B
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- dust
- side wall
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- blackboard
- block
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
Abstract
The invention discloses a centrifugal force-based dust collection type blackboard eraser for teaching, which comprises a shell, wherein the side wall of the shell is fixedly connected with an installation block, the side wall of the installation block is provided with a plurality of movable cleaning plates, the installation block is provided with a dust collection mechanism for collecting chalk dust generated in the blackboard erasing process, the dust collection mechanism comprises a control cavity arranged in the installation block, the inner wall of the control cavity is hermetically and slidably connected with a magnetic sliding plug, and a dust collection cavity in the vertical direction is arranged in the installation block. The blackboard eraser can effectively avoid the phenomenon that chalk dust scatters everywhere in the process of erasing the blackboard, and avoid the chalk dust from being sucked into the body by students and teachers, thereby greatly reducing the influence of the scattered chalk dust on the students and teachers, ensuring the health of the students and teachers, and being capable of more comprehensively erasing the blackboard, improving the cleaning effect on the blackboard, and simultaneously ensuring that the blackboard eraser can have better cleaning effect after repeatedly erasing the blackboard.
Description
Technical Field
The invention relates to the technical field of blackboard erasers, in particular to a dust collection type blackboard eraser for teaching based on centrifugal force.
Background
The blackboard eraser, also called chalk eraser, is a tool for erasing chalk writing, and the traditional blackboard eraser usually has the following defects in the using process:
1. as is well known, in the process of using the blackboard eraser to erase chalk writings on a blackboard, erased chalk dust flies everywhere, and the main components of the chalk dust are calcium carbonate, calcium oxide and the like, if the chalk dust falls into eyes of a person, the chalk dust can stimulate lacrimal gland to secrete and cause certain damage to the eyes, and when the chalk dust falls onto skin, the chalk dust can also stimulate skin membranes to dry and roughen the skin, so that the chalk dust is long-term, and certain damage can be caused to students in classrooms, especially teachers working beside the blackboard;
2. after the blackboard eraser is used for a long time, a large amount of chalk dust can be attached to the felt surface of the blackboard eraser, the chalk dust serves as a substance similar to a lubricant between the blackboard eraser and the blackboard eraser, the friction force between the blackboard eraser and the blackboard is reduced, the effect of the blackboard eraser on clearing chalk marks is influenced, a plurality of disordered chalk marks exist on the blackboard for a long time, even the situation that students cannot clearly see characters on the blackboard occurs, and certain influence is brought to the teaching process;
3. when certain chalk dust is attached to a felt surface of a blackboard eraser, the blackboard eraser needs to be cleaned usually, and a user holds the blackboard eraser to flap to the wall or the ground in a traditional cleaning mode, so that the chalk dust on the blackboard eraser can be flapped, the chalk dust can scatter around in the process, the chalk dust is easily sucked into a human body, and the chalk dust can be attached to clothes of the user to dirty clothes, so that great trouble is brought to people.
Therefore, a dust collection type blackboard eraser for teaching based on centrifugal force needs to be designed to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a dust collection type blackboard eraser for teaching based on centrifugal force.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dust absorption type blackboard eraser for teaching based on centrifugal force comprises a shell, wherein the side wall of the shell is fixedly connected with an installation block, the side wall of the installation block is provided with a plurality of movable cleaning plates, and the installation block is provided with a dust absorption mechanism for absorbing chalk dust generated in the blackboard erasing process;
the dust suction mechanism comprises a control cavity arranged in an installation block, the inner wall of the control cavity is connected with a magnetic sliding plug in a sealing and sliding manner, a dust suction cavity along the vertical direction is formed in the installation block, a plurality of dust suction holes are formed in the side wall of the installation block and are communicated with the dust suction cavity, an installation groove is formed in the side wall of the installation block, a detachable collection box is arranged in the installation groove, a first connecting pipe and a second connecting pipe are arranged on the side wall of the control cavity in a communicating manner, check valves are arranged on the first connecting pipe and the second connecting pipe respectively, one end of the first connecting pipe, far away from the control cavity, is communicated with the collection box, and one end of the second connecting pipe, far away from the control cavity, is communicated with the dust suction cavity;
the mounting block is provided with a driving mechanism for driving the plurality of cleaning plates to move;
and the mounting block is provided with a cleaning mechanism for cleaning chalk dust adhered to the surfaces of the plurality of cleaning plates.
Preferably, the driving mechanism comprises a plurality of guide grooves formed in the side wall of the mounting block, the inner walls of the guide grooves are all connected with guide blocks in a sliding manner, the guide blocks are respectively and fixedly connected with the side walls of the cleaning plates, a plurality of air injection cavities are formed in the mounting block and respectively positioned right above the guide grooves, the inner walls of the air injection cavities are all connected with piston plates in a sealing and sliding manner, and the lower walls of the piston plates are all fixedly connected with the side walls of the guide blocks below through connecting rods;
and the inner walls of the gas injection cavities are communicated with the control cavity through third connecting pipes.
Preferably, the cleaning mechanism comprises cavities arranged in a plurality of cleaning plates, a plurality of inner walls of the cavities are fixedly connected with electromagnetic plates, a plurality of side walls of the electromagnetic plates are fixedly connected with a plurality of limiting rods, a plurality of movable lugs are arranged in the cavities, a plurality of side walls of the lugs are provided with limiting grooves, the limiting rods are respectively positioned in the limiting grooves, and one ends of the limiting rods are elastically connected with the corresponding inner walls of the limiting grooves through first springs;
a lead frame is embedded in the mounting block and is positioned at the lower left of the control cavity;
and the mounting block is provided with a control mechanism for controlling the on-off of the plurality of electromagnetic plates.
Preferably, the control mechanism comprises a groove formed in the side wall of the mounting block, the inner wall of the groove is fixedly connected with a guide rod, the side wall of the guide rod is slidably sleeved with two moving blocks, the side walls of the two moving blocks are fixedly connected with an electricity-connecting block, and the side walls of the two moving blocks are elastically connected with the inner wall of the groove through a second spring;
one side wall of one of the cleaning plates is fixedly connected with an extrusion block, and the extrusion block is arranged opposite to the groove;
the shell lateral wall is equipped with the battery, and is a plurality of electromagnetic plate, two connect electric block and battery electric connection.
Preferably, the side walls of the two moving blocks are provided with inclined planes, and the two moving blocks are made of rubber materials.
Preferably, the housing is made of a plastic material, and the side wall of the housing is provided with anti-slip lines.
The invention has the following beneficial effects:
1. according to the invention, the dust sucking mechanism is arranged, and the magnetic sliding plug can continuously move left and right in the control cavity under the action of centrifugal force along with the continuous swinging of the mounting block in the process of erasing the blackboard, so that chalk dust generated in the process of erasing the blackboard can be sucked into the dust sucking cavity through the dust sucking holes and finally discharged into the collecting box, the phenomenon that the chalk dust scatters around in the process of erasing the blackboard can be effectively avoided, the chalk dust is prevented from being sucked into the body by students and teachers, the influence of the scattered chalk dust on the students and teachers is greatly reduced, and the health of the students and teachers is ensured;
2. according to the blackboard cleaning device, the driving mechanism is arranged, when the magnetic sliding plug moves rightwards, the magnetic sliding plug can extrude right gas into the third connecting pipes and can drive the cleaning plates to move downwards, and when the magnetic sliding plug moves leftwards, the magnetic sliding plug can suck gas in the gas injection cavities into the control cavity so as to reset the cleaning plates;
3. according to the invention, the cleaning mechanism is arranged, along with the left and right movement of the magnetic sliding plug, the plurality of electromagnetic plates can be intermittently powered on and powered off, so that the plurality of bumps continuously hit the inner walls of the plurality of cavities, the chalk dust on the surfaces of the plurality of cleaning plates is shaken off, and meanwhile, the shaken off chalk dust can be absorbed by the plurality of dust absorption holes in cooperation with the normal dust absorption function of the device, so that the phenomenon of scattering all around can not occur, the cleaning effect on the cleaning plates is obvious, the cleaning mode is simple, the phenomenon of scattering all around of the chalk dust in the cleaning process can be avoided, meanwhile, the blackboard eraser can have a better cleaning effect after the blackboard is repeatedly wiped, and great convenience is brought to the using process of the device.
Drawings
FIG. 1 is a schematic structural diagram of a centrifugal force-based dust-absorbing blackboard eraser for teaching use according to the present invention;
FIG. 2 is a schematic cross-sectional view of a dust-absorbing blackboard eraser for teaching based on centrifugal force according to the present invention;
FIG. 3 is a sectional view along direction A-A of a centrifugal force-based dust-absorption blackboard eraser for teaching use according to the present invention;
FIG. 4 is an enlarged view of a structure at a position B of the teaching dust-absorption blackboard eraser based on centrifugal force, which is provided by the invention;
FIG. 5 is an enlarged view of a structure at the position C of the teaching dust-absorption blackboard eraser based on centrifugal force, which is provided by the invention;
FIG. 6 is an enlarged view of a structure at a position D of the dust absorption type blackboard eraser for teaching based on centrifugal force, which is provided by the invention;
fig. 7 is a schematic cross-sectional structure view of a centrifugal force-based dust-absorption blackboard eraser for teaching according to the present invention.
In the figure: the device comprises a shell 1, a mounting block 2, a dust suction hole 3, a cleaning plate 4, a control cavity 5, a magnetic sliding plug 6, a first connecting pipe 7, a collecting box 8, a dust suction cavity 9, a cavity 10, a second connecting pipe 11, a lead frame 12, a groove 13, an electric connecting block 14, a moving block 15, an extrusion block 16, an electromagnetic plate 17, a convex block 18, a limiting groove 19, a limiting rod 20, an air injection cavity 21, a piston plate 22, a third connecting pipe 23, a guide groove 24, a connecting rod 25, a guide block 26 and a mounting groove 27.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-7, a centrifugal force-based dust collection type blackboard eraser for teaching comprises a shell 1, wherein the shell 1 is made of a plastic material, the side wall of the shell 1 is provided with anti-slip lines to prevent a student or a teacher from slipping when holding the blackboard eraser, so that the blackboard eraser is convenient for the student or the teacher to use, the side wall of the shell 1 is fixedly connected with an installation block 2, the side wall of the installation block 2 is provided with a plurality of movable cleaning plates 4, the cleaning plates 4 are all made of a sponge material, and the installation block 2 is provided with a dust suction mechanism for sucking and removing chalk dust generated in the blackboard erasing process;
the dust suction mechanism comprises a control cavity 5 arranged in an installation block 2, the inner wall of the control cavity 5 is connected with a magnetic sliding plug 6 in a sealing and sliding manner, a dust suction cavity 9 along the vertical direction is arranged in the installation block 2, a plurality of dust suction holes 3 are arranged on the side wall of the installation block 2, the dust suction holes 3 are all communicated with the dust suction cavity 9, an installation groove 27 is arranged on the side wall of the installation block 2, a detachable collection box 8 is arranged in the installation groove 27, a first connecting pipe 7 and a second connecting pipe 11 are arranged on the side wall of the control cavity 5 in a communicating manner, check valves are arranged on the first connecting pipe 7 and the second connecting pipe 11, the check valves on the first connecting pipe 7 limit dust to only move out of the control cavity 5, the check valves on the second connecting pipe 11 limit dust to only enter the control cavity 5 from the dust suction cavity 9, one end of the first connecting pipe 7 far away from the control cavity 5 is communicated with the collection box 8, one end of the second connecting pipe 11 far away from the control cavity 5 is communicated with the dust suction cavity 9, along with the left-right movement of the magnetic sliding plug 6, the plurality of dust suction holes 3 can continuously suck the generated chalk dust into the dust suction cavity 9 and finally discharge the chalk dust into the collection box 8, so that the chalk dust can be uniformly treated in the later period.
The mounting block 2 is provided with a driving mechanism for driving the plurality of cleaning plates 4 to move, the driving mechanism comprises a plurality of guide grooves 24 formed in the side wall of the mounting block 2, the inner walls of the guide grooves 24 are all connected with guide blocks 26 in a sliding manner, the guide blocks 26 are respectively fixedly connected with the side walls of the plurality of cleaning plates 4, a plurality of air injection cavities 21 are formed in the mounting block 2, the plurality of air injection cavities 21 are respectively positioned right above the guide grooves 24, the inner walls of the plurality of air injection cavities 21 are all connected with piston plates 22 in a sealing and sliding manner, the lower walls of the plurality of piston plates 22 are all fixedly connected with the side wall of the guide block 26 below through connecting rods 25, and the connecting rods 25 play roles in limiting and guiding the movement of the guide blocks 26;
the inner walls of the air injection cavities 21 are communicated with the control cavity 5 through third connecting pipes 23.
The chalk dust cleaning device is characterized in that a cleaning mechanism for cleaning chalk dust adhered to the surfaces of a plurality of cleaning plates 4 is arranged on the mounting block 2, the cleaning mechanism comprises cavities 10 formed in the cleaning plates 4, electromagnetic plates 17 are fixedly connected to the inner walls of the cavities 10, a plurality of limiting rods 20 are fixedly connected to the side walls of the electromagnetic plates 17, a plurality of movable lugs 18 are arranged in the cavities 10, limiting grooves 19 are formed in the side walls of the lugs 18, the limiting rods 20 are respectively located in the limiting grooves 19, the limiting rods 20 and the limiting grooves 19 limit the movement of the lugs 18, one ends of the limiting rods 20 are elastically connected with the inner walls of the corresponding limiting grooves 19 through first springs, and the first springs facilitate the resetting of the lugs 18;
the lead frame 12 is embedded in the mounting block 2, and the lead frame 12 is positioned at the lower left of the control cavity 5.
The installation block 2 is provided with a control mechanism for controlling the on-off of the plurality of electromagnetic plates 17, the control mechanism comprises a groove 13 formed in the side wall of the installation block 2, the inner wall of the groove 13 is fixedly connected with a guide rod, the side wall of the guide rod is slidably sleeved with two moving blocks 15, the side walls of the two moving blocks 15 are both provided with inclined planes, a squeezing block 16 is convenient to squeeze the two moving blocks 15 and enable the two moving blocks 15 to be away from each other, the two moving blocks 15 are made of rubber materials, the side walls of the two moving blocks 15 are both fixedly connected with a power-on block 14, in an initial state, a cleaning plate 4 where the squeezing block 16 is located is not in contact with a blackboard, the squeezing block 16 cannot be in contact with the two moving blocks 15, the two moving blocks 15 are in contact under the elastic action of a second spring, and the side walls of the two moving blocks 15 are both elastically connected with the inner wall of the groove 13 through the second spring;
one of the cleaning plates 4 is fixedly connected with an extrusion block 16 on the side wall, and the extrusion block 16 is arranged opposite to the groove 13;
the battery is arranged on the side wall of the shell 1, and the electromagnetic plates 17 and the two electricity-connecting blocks 14 are electrically connected with the battery.
When a teacher or a student uses the blackboard eraser to erase a blackboard, the plurality of cleaning plates 4 are attached to the surface of the blackboard and the installation block 2 is swung, the plurality of cleaning plates 4 can erase chalk marks on the blackboard, and meanwhile, the magnetic sliding plug 6 can continuously move left and right in the control cavity 5 under the action of centrifugal force in the swinging process of the installation block 2, as the one-way valve on the first connecting pipe 7 limits that dust can only move out of the control cavity 5 and the one-way valve on the second connecting pipe 11 limits that dust can only enter the control cavity 5 from the dust suction cavity 9, when the magnetic sliding plug 6 moves rightwards, the magnetic sliding plug 6 can suck chalk dust generated in the blackboard erasing process into the dust suction cavity 9 through the plurality of dust suction holes 3 and into the control cavity 5 through the second connecting pipe 11, and when the magnetic sliding plug 6 moves leftwards, the magnetic sliding plug 6 can push the chalk dust in the control cavity 5 into the collection box 8 through the first connecting pipe 7, the phenomenon that chalk dust scatters around in the blackboard erasing process can be effectively avoided.
When the magnetic sliding plug 6 moves rightwards, the magnetic sliding plug 6 can extrude right gas into a plurality of third connecting pipes 23, the gas can drive a plurality of piston plates 22 to move downwards after entering a plurality of gas injection cavities 21 through the plurality of third connecting pipes 23, then the plurality of guide blocks 26 are driven to move downwards through a plurality of connecting rods 25, thereby driving a plurality of cleaning plates 4 to move downwards, when the magnetic sliding plug 6 moves leftwards, the magnetic sliding plug 6 can also pump the gas in the plurality of gas injection cavities 21 into the control cavity 5, so that the plurality of cleaning plates 4 reset, based on the process, when a person swings the installation block 2 to clean a blackboard, the plurality of cleaning plates 4 not only can move along with the installation block 2, but also can move upwards and downwards continuously, the blackboard can be cleaned more comprehensively, and therefore the cleaning effect of the blackboard is improved.
When the installation block 2 is used for wiping the blackboard, the plurality of cleaning plates 4 can be tightly attached to the surface of the blackboard, and because the cleaning plates 4 are made of sponge materials, the plurality of cleaning plates 4 can deform when being tightly attached to the blackboard, so that the pressing blocks 16 can press the inclined surface portions of the two moving blocks 15, and thus, the two moving blocks 15 are separated from each other by the pressing of the pressing blocks 16, so that the two electric connection blocks 14 are separated from each other, a closed loop formed by the plurality of electromagnetic plates 17, the two electric connection blocks 14 and the battery is in an open circuit state, no induced current is generated on the lead frame 12 in the moving process of the magnetic sliding plug 6, when the chalk dust adhered on the surfaces of the cleaning plates 4 needs to be cleaned, a user only needs to continuously shake the mounting block 2, since the plurality of cleaning plates 4 are not subjected to external force, the squeezing blocks 16 do not squeeze the two moving blocks 15, and a closed loop formed by the plurality of electromagnetic plates 17, the two power-on blocks 14 and the battery is in a closed state.
Along with the swinging of the installation block 2, the magnetic sliding plug 6 can continuously move left and right in the control cavity 5, the device can still exert the normal dust absorption function of the device, when the magnetic sliding plug 6 moves to one end close to the lead frame 12, the magnetic field intensity of the lead frame 12 is continuously changed, induction current can be generated on the lead frame 12 according to the electromagnetic induction principle, then the plurality of electromagnetic plates 17 are electrified to be magnetized, the plurality of electromagnetic plates 17 can repel the plurality of bumps 18 after being electrified to be magnetized, the plurality of bumps 18 extrude the inner wall of the corresponding cavity 10, when the magnetic sliding plug 6 moves to one end far away from the lead frame 12, the magnetic field near the lead frame 12 disappears, the induction current on the lead frame 12 also disappears, the plurality of electromagnetic plates 17 are all powered off and demagnetized, the plurality of bumps 18 can reset under the tensile force corresponding to the second spring, based on the process, along with the left and right movement of the magnetic sliding plug 6, the electromagnetic plates 17 can be intermittently powered on and powered off, so that the bumps 18 continuously hit the inner walls of the cavities 10, chalk dust on the surfaces of the cleaning plates 4 is shaken off, and meanwhile, the normal dust suction function of the device is matched, the shaken off chalk dust can be absorbed by the dust suction holes 3, and the flying phenomenon can not occur.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A dust collection type blackboard eraser for teaching based on centrifugal force comprises a shell (1) and is characterized in that the side wall of the shell (1) is fixedly connected with an installation block (2), the side wall of the installation block (2) is provided with a plurality of movable cleaning plates (4), and the installation block (2) is provided with a dust collection mechanism for collecting chalk dust generated in the blackboard erasing process;
the dust suction mechanism comprises a control cavity (5) arranged inside an installation block (2), the inner wall of the control cavity (5) is connected with a magnetic sliding plug (6) in a sealing and sliding manner, a dust suction cavity (9) along the vertical direction is formed inside the installation block (2), a plurality of dust suction holes (3) are formed in the side wall of the installation block (2), the dust suction holes (3) are communicated with the dust suction cavity (9), an installation groove (27) is formed in the side wall of the installation block (2), a detachable collection box (8) is arranged in the installation groove (27), a first connecting pipe (7) and a second connecting pipe (11) are communicated with the side wall of the control cavity (5), one-way valves are arranged on the first connecting pipe (7) and the second connecting pipe (11), one end, far away from the control cavity (5), of the first connecting pipe (7) is communicated with the collection box (8), one end of the second connecting pipe (11) far away from the control cavity (5) is communicated with the dust suction cavity (9);
the mounting block (2) is provided with a driving mechanism for driving the cleaning plates (4) to move;
the mounting block (2) is provided with a cleaning mechanism for cleaning chalk dust adhered to the surfaces of the cleaning plates (4);
the cleaning mechanism comprises cavities (10) arranged inside a plurality of cleaning plates (4), the inner walls of the cavities (10) are fixedly connected with electromagnetic plates (17), the side walls of the electromagnetic plates (17) are fixedly connected with a plurality of limiting rods (20), a plurality of movable convex blocks (18) are arranged inside the cavities (10), limiting grooves (19) are formed in the side walls of the convex blocks (18), the limiting rods (20) are respectively positioned in the limiting grooves (19), and one ends of the limiting rods (20) are elastically connected with the inner walls of the corresponding limiting grooves (19) through first springs;
a lead frame (12) is embedded in the mounting block (2), and the lead frame (12) is positioned at the lower left of the control cavity (5);
and the mounting block (2) is provided with a control mechanism for controlling the on-off of the plurality of electromagnetic plates (17).
2. The blackboard eraser with dust absorption for teaching based on centrifugal force according to claim 1, wherein the driving mechanism comprises a plurality of guide grooves (24) formed in the side wall of the mounting block (2), the inner walls of the guide grooves (24) are all connected with guide blocks (26) in a sliding manner, the guide blocks (26) are respectively and fixedly connected with the side walls of the cleaning plates (4), a plurality of air injection cavities (21) are formed in the mounting block (2), the air injection cavities (21) are respectively positioned right above the guide grooves (24), the inner walls of the air injection cavities (21) are all connected with piston plates (22) in a sealing and sliding manner, and the lower walls of the piston plates (22) are all fixedly connected with the side walls of the guide blocks (26) below through connecting rods (25);
the inner walls of the air injection cavities (21) are communicated with the control cavity (5) through third connecting pipes (23).
3. The centrifugal force-based dust collection type blackboard eraser for teaching according to claim 2, wherein the control mechanism includes a groove (13) formed in a side wall of the mounting block (2), a guide rod is fixedly connected to an inner wall of the groove (13), two moving blocks (15) are slidably sleeved on the side wall of the guide rod, side walls of the two moving blocks (15) are fixedly connected to a power receiving block (14), and side walls of the two moving blocks (15) are elastically connected to the inner wall of the groove (13) through second springs;
one side wall of one of the cleaning plates (4) is fixedly connected with an extrusion block (16), and the extrusion block (16) is arranged opposite to the groove (13);
the battery is arranged on the side wall of the shell (1), and the electromagnetic plates (17) and the two electricity-connecting blocks (14) are electrically connected with the battery.
4. The dust absorption type blackboard eraser for teaching based on centrifugal force according to claim 3, wherein the two moving blocks (15) are provided with inclined surfaces on the side walls, and the two moving blocks (15) are made of rubber material.
5. A centrifugal force based blackboard eraser with dust absorption for teaching purpose according to claim 3, wherein the casing (1) is made of plastic material, and the side wall of the casing (1) is provided with anti-slip lines.
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| CN202011579667.3A CN112606599B (en) | 2020-12-28 | 2020-12-28 | Dust absorption type blackboard eraser is used in teaching based on centrifugal force |
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| CN202011579667.3A CN112606599B (en) | 2020-12-28 | 2020-12-28 | Dust absorption type blackboard eraser is used in teaching based on centrifugal force |
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| CN114043814B (en) * | 2021-12-07 | 2024-03-08 | 南京亭宣文化传媒有限公司 | Education is with multi-functional education equipment and education is with multi-functional education equipment |
| CN114347699B (en) * | 2022-01-12 | 2023-04-25 | 诸暨市天硕商贸有限公司 | Blackboard equipment for writing by means of magnetic powder |
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| CN105172440A (en) * | 2015-07-28 | 2015-12-23 | 杨柳青 | Environment-friendly blackboard eraser device |
| CN108688387A (en) * | 2018-07-18 | 2018-10-23 | 张志华 | A kind of blackboard eraser of dust-proof anti-accumulation |
| CN109760452A (en) * | 2019-03-06 | 2019-05-17 | 凡得雨 | A kind of black board eraser with chalk-dust collector |
| CN211493463U (en) * | 2019-12-19 | 2020-09-15 | 湖北职业技术学院 | Negative pressure adsorption type dust-absorption blackboard eraser |
| CN111267523A (en) * | 2020-04-08 | 2020-06-12 | 姜培文 | Blackboard eraser capable of preventing dust from flying |
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| CN112606599A (en) | 2021-04-06 |
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Effective date of registration: 20220701 Address after: 272600 No. 2, Zhixing Road, Liangshan Economic Development Zone, Jining City, Shandong Province Applicant after: Shandong Golden Sun Education Group Co.,Ltd. Address before: No. 137, Zhongyuan West Road, Zhongyuan West Road Street, Zhongyuan District, Zhengzhou City, Henan Province, 450000 Applicant before: Jiang Peiwen |
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Denomination of invention: A vacuum blackboard eraser for teaching based on centrifugal force Effective date of registration: 20220930 Granted publication date: 20220722 Pledgee: Industrial and Commercial Bank of China Limited Liangshan sub branch Pledgor: Shandong Golden Sun Education Group Co.,Ltd. Registration number: Y2022980017485 |