CN113561684A - Mechanical dust-absorbing blackboard eraser - Google Patents
Mechanical dust-absorbing blackboard eraser Download PDFInfo
- Publication number
- CN113561684A CN113561684A CN202110722117.0A CN202110722117A CN113561684A CN 113561684 A CN113561684 A CN 113561684A CN 202110722117 A CN202110722117 A CN 202110722117A CN 113561684 A CN113561684 A CN 113561684A
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- China
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- gear
- rotating shaft
- rotating
- inner shell
- blackboard eraser
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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
-
- 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
- B43L21/04—Wiper holders
Abstract
The invention discloses a mechanical dust-absorption blackboard eraser, which comprises a brush body, a brush table, an outer shell, an inner shell, a cover body, a chalk dust channel and a rotating device, wherein the lower end of the outer shell is connected with the brush table, the middle part of the brush table is connected with the brush body, the edge of the brush table is provided with second through holes around the brush body, the second through holes and the chalk dust channel are communicated with an inner cavity of the inner shell, the inner shell is provided with third through holes, the third through holes are provided with filtering membranes, and the cover body can open or cover the outer shell and the inner shell; the invention provides a blackboard eraser capable of absorbing chalk dust and convenient to use.
Description
Technical Field
The invention belongs to the technical field of writing and drawing instruments, and particularly relates to a mechanical dust-absorption blackboard eraser.
Technical Field
The traditional blackboard eraser is not provided with a chalk dust storage device in the erasing process, so chalk dust falls into a chalk dust groove by gravity or is adhered to a blackboard eraser brush, and as one part of chalk dust particles are small, the dust falls slowly, some dust can be possibly sucked by a human body, the long-time suction of the dust can cause the risk of pneumoconiosis, and some dust can be attached to clothes, hands and hair, so that the blackboard eraser capable of adsorbing the chalk dust and convenient to use is needed for creating a good environment.
Disclosure of Invention
The invention aims to provide a mechanical dust-absorption blackboard eraser, which solves the technical problems that chalk dust is diffused into air and the use is inconvenient in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the mechanical dust-absorption blackboard eraser comprises a brush body, a brush table, an outer shell, an inner shell, a cover body, a chalk dust channel and a rotating device, wherein the outer shell and the inner shell are not provided with upper and lower bottom surfaces; the cover body can open or cover the outer shell and the inner shell; the rotating device comprises a rotating wheel, a rotating shaft and a one-way exhaust fan, the one-way exhaust fan comprises a blade connecting piece and blades, ratchets are arranged on the inner side of the blade connecting piece, the outer side of the blade connecting piece is connected with the blades, a pawl is arranged on the rotating shaft, and the pawl and the ratchets of the blade connecting piece are meshed to form an inner-meshing one-way rotating mechanism.
The air of the inner shell is discharged out of the shell by arranging the rotating device, and the specific process is as follows: when the blackboard eraser is used, a user moves the blackboard eraser relative to a blackboard, a rotating wheel arranged on the blackboard eraser rotates under the action of blackboard friction force, the rotating wheel drives a rotating shaft to rotate, a pawl on the rotating shaft also rotates, when the rotating pawl is meshed with a ratchet on the inner side of a blade connecting piece, the blade connecting piece and the blade rotate, otherwise, the rotating is stopped, so that unidirectional rotation is realized, after the blade rotates, air in an inner shell is pumped out through a third through hole in the inner shell, certain negative pressure is formed in the inner shell, chalk dust erased from the blackboard passes through a second through hole of a brush table under the action of the negative pressure, is sequentially sucked into a chalk dust channel and the inner shell, is filtered on the inner side of the inner shell by a filter screen, and when the chalk dust on the inner side of the inner shell is fully stored, a second cover body is opened to clear the chalk dust out of the inner shell.
Furthermore, the number of the rotating devices is two, and the two rotating devices are respectively and oppositely arranged at two opposite ends of the outer shell.
By arranging the two rotating devices, when a user erases the blackboard, because the two rotating devices are oppositely arranged at the two ends of the outer shell, the one-way rotating directions of the two rotating devices are opposite, so that no matter what direction the user moves the blackboard eraser, one rotating device works.
Furthermore, an anti-slip sleeve is arranged outside the runner and is made of an anti-slip material with high elasticity.
The anti-slip sleeve is arranged on the rotating wheel, so that the rotating efficiency of the rotating wheel can be improved, and the relative slip with the blackboard is reduced.
Furthermore, an air guide pipe is arranged in the ventilation opening, so that the blades, the pawls and the blade connecting pieces on the rotating shaft are positioned in the air guide pipe.
The air guide pipe is arranged at the air vent, the blades, the pawls and the blade connecting piece are arranged in the air guide pipe, one end of the air guide pipe is directly communicated with the inner side of the inner shell, so that the unidirectional exhaust fan can more directly exhaust air in the inner shell through the air guide pipe, and the energy loss of the unidirectional exhaust fan is reduced.
Furthermore, the rotating device further comprises a first gear, a second gear, the rotating shaft is composed of a first rotating shaft and a second rotating shaft, one end of the first rotating shaft is connected with the outer shell, the other end of the first rotating shaft is connected with the first gear, the rotating wheel is connected onto the first rotating shaft, one end of the second rotating shaft is connected with the second gear, the other end of the second rotating shaft is connected with the pawl, the pawl is meshed with the ratchet inside the one-way exhaust fan, the first gear and the second gear are meshed to form a gear transmission system, and the diameter of the first gear is larger than that of the second gear.
Through setting up first gear and second gear, and make the diameter of first gear be greater than the second gear, a driven gear drive with higher speed has been formed like this, when the runner on the first pivot rotates, drive first gear revolve, first gear will rotate and transmit for the second gear, and drive the rotation of second pivot, the epaxial pawl of second pivot rotates with the second pivot, the pawl is the same with the all the other working process of one-way air discharge fan and the process in embodiment one, through setting up this driven gear drive with higher speed, can make the slew velocity of second gear faster, make the slew velocity of blade faster, the ability of the take out negative pressure that makes one-way air discharge fan is stronger.
The invention has the beneficial effects that:
when the blades rotate, air in the inner shell is pumped out, certain negative pressure is formed in the inner shell, under the action of the negative pressure, chalk dust which is wiped off the blackboard passes through the through hole of the brush table and is sequentially sucked into the chalk dust channel and the inner shell, the chalk dust is filtered by the filter screen film on the inner side of the inner shell, and the chalk dust is sucked into the inner shell through the mechanical rotating device, so that the blackboard eraser capable of adsorbing the chalk dust and convenient to use is provided.
Drawings
Fig. 1 is a top view of the first embodiment of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a sectional view a-a of fig. 1.
FIG. 4 is a front view of a blade, blade connector and shaft according to an embodiment of the present invention.
Fig. 5 is a left side view of fig. 4.
Fig. 6 is a top view of the second embodiment of the present invention.
Fig. 7 is a left side view of fig. 6.
Fig. 8 is a sectional view a-a of fig. 6.
Fig. 9 is a schematic view of a corresponding gear rotation structure in the second embodiment of the invention.
Parts, components and numbers in the figures; the chalk dust collecting device comprises a rotating wheel 1, a hairbrush 2, a hairbrush table 3, an outer shell 4, an inner shell 5, a cover body 6, a chalk dust channel 7, an air guide pipe 8, a blade 9, a pawl 10, a blade connecting piece 11, a first gear 12, a second gear 13, a first rotating shaft 14 and a second rotating shaft 15.
Detailed Description
The following description will be given of a specific embodiment of the present invention with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1, 2, 3, 4 and 5, the mechanical dust-absorbing blackboard eraser comprises a brush body 2, a brush table 3, an outer shell 4, an inner shell 5, a cover body 6, a chalk dust channel 7 and a rotating device, wherein both the outer shell 4 and the inner shell 5 have no upper bottom surface and no lower bottom surface, the outer shell 4 is provided with a first through hole, the lower end of the outer shell 4 is connected with the brush table 3, the middle part of the brush table 3 is connected with the brush body 2, the edge of the brush table 3 is surrounded by the brush body 2 and is provided with a second through hole, the second through hole is communicated with the chalk dust channel 7, the chalk dust channel 7 is communicated with an inner cavity of the inner shell 5, the inner shell 5 is positioned in the outer shell 4, the inner shell 5 is provided with a third through hole, the third through hole is provided with a filtering film, and the first through hole and the third through hole communicate the atmosphere side with the inner shell cavity; the cover body 6 can open or cover the outer shell 4 and the inner shell 5; the rotating device comprises a rotating wheel 1, a rotating shaft and a one-way exhaust fan, wherein the one-way exhaust fan comprises a blade connecting piece 11 and blades 9, ratchets are arranged on the inner side of the blade connecting piece 11, the outer side of the blade connecting piece is connected with the blades 9, a pawl 10 is arranged on the rotating shaft, and the pawl 10 and the ratchets of the blade connecting piece 11 are meshed to form an inner meshing one-way rotating mechanism.
The air in the inner shell 5 is discharged out of the shell by arranging the rotating device, and the specific process is as follows: when the blackboard eraser is used, a user moves the blackboard eraser relative to a blackboard, the rotating wheel 1 arranged on the blackboard eraser rotates under the action of the friction force of the blackboard, the rotating wheel 1 drives the rotating shaft to rotate, so that the pawl 10 on the rotating shaft also rotates, when the rotating pawl 10 is engaged with the ratchet inside the blade link 11, the blade link 11 and the blade 9 rotate, otherwise, the rotation is stopped, thereby realizing unidirectional rotation, after the blades 9 rotate, the air in the inner shell 5 is pumped out through the third through holes, so that a certain negative pressure is formed in the inner shell 5, under the action of negative pressure, the chalk dust wiped off the blackboard is sequentially sucked into the chalk dust channel 7 and the inner shell 5 through the second through hole of the brush table 3, filtered by the filter screen film at the inner side of the inner shell 5, when the inner side of the inner case 5 is filled with chalk dust, the cover 6 is opened to remove the chalk dust from the inner case 5.
Example two:
the difference between the second embodiment and the first embodiment is that two rotating devices are arranged at two ends of the outer shell 4 oppositely.
By arranging the two rotating devices, when a user erases the blackboard, the rotating directions of the two rotating devices are opposite because the two rotating devices are oppositely arranged at the two ends of the outer shell 4, and the user can work by one rotating device no matter in which direction the user slides the blackboard eraser.
Example three:
the difference between the third embodiment and the previous embodiment is that the anti-slip sleeve is arranged outside the rotating wheel 1, and the anti-slip sleeve is made of anti-slip materials with rich elasticity, such as rubber, anti-slip plastic and the like.
The anti-slip sleeve is arranged on the rotating wheel, so that the rotating efficiency of the rotating wheel 1 can be improved, and the relative slip with the blackboard is reduced.
Example four:
the difference between the fourth embodiment and the previous embodiment is that the third through hole is provided with an air guide pipe 8, so that the blade 9, the pawl 10 and the blade connecting piece 11 on the rotating shaft are positioned in the air guide pipe 8.
The air guide pipe 8 is arranged on the third through hole, so that the blade 9, the pawl 10 and the blade connecting piece 11 are arranged in the air guide pipe 8, one end of the air guide pipe 8 is directly connected with the inner side of the inner shell 5, and therefore air in the inner shell 5 can be pumped out more quickly through rotation of the blade 9, and negative pressure is formed in the inner shell 5 more quickly.
Example five:
as shown in fig. 4, 5, 6, 7, 8 and 9, the mechanical dust-absorbing blackboard eraser of the fourth embodiment is different from the previous embodiments in that the rotating device further comprises a first gear 12 and a second gear 13, the rotating shaft is composed of a first rotating shaft 14 and a second rotating shaft 15, one end of the first rotating shaft 14 is connected with the outer shell 4, the other end is connected with the first gear 12, the rotating wheel 1 is connected with the first rotating shaft 14, one end of the second rotating shaft 15 is connected with the second gear 13, the other end is connected with the pawl 10, the pawl 10 is engaged with the ratchet inside the one-way exhaust fan, the first gear 12 is engaged with the second gear 13 to form a gear transmission system, and the diameter of the first gear 12 is larger than that of the second gear 13.
Through setting up first gear 12 and second gear 13, and make the diameter of first gear 12 be greater than second gear 13, formed a gear drive mechanism who accelerates transmission like this, when runner 1 on the first pivot 14 rotates, drive first gear 12 and rotate, first gear 12 will rotate and transmit for second gear 13 and drive the rotation of second pivot 15, pawl 10 and second pivot 15 on the second pivot 15 rotate together, pawl 10 and the all the other working process of one-way air discharge fan are the same with the process in embodiment one, through setting up this gear drive mechanism that accelerates, can make the slew velocity of second gear faster, so that the slew velocity of pivot is faster, corresponding blade slew velocity also can be fast, the ability of taking out the negative pressure of one-way air discharge fan is stronger.
Claims (5)
1. A mechanical dust-absorption blackboard eraser is characterized by comprising a brush body (2), a brush table (3), an outer shell (4), an inner shell (5), a cover body (6), a chalk dust channel (7) and a rotating device, the outer shell (4) and the inner shell (5) are both provided with upper and lower bottom surfaces, a first through hole is formed in the outer shell (4), the lower end of the outer shell (4) is connected with the brush table (3), the middle of the brush table (3) is connected with the brush body (2), second through holes are formed in the edge of the brush table (3) around the brush body (2), the second through holes are communicated with the chalk dust channel (7), the chalk dust channel (7) is communicated with an inner cavity of the inner shell (5), the inner shell (5) is connected with the brush table (3), a third through hole is formed in the inner shell (5), a filtering film is arranged on the third through hole, and the atmosphere side and the inner shell cavity are communicated through the first through hole and the third through hole;
the cover body (6) can open or cover the outer shell (4) and the inner shell (5);
the rotating device comprises a rotating wheel (1), a rotating shaft and a one-way exhaust fan, the one-way exhaust fan comprises a blade connecting piece (11) and blades (9), ratchets are arranged on the inner side of the blade connecting piece (11), the outer side of the blade connecting piece is connected with the blades (9), a pawl (10) is arranged on the rotating shaft, and the ratchets of the pawl (10) and the blade connecting piece (11) are meshed to form an inner-meshing one-way rotating mechanism.
2. The blackboard eraser with dust suction function according to claim 1, characterized in that the rotating means are two and are oppositely arranged at two ends of the outer casing (4).
3. The blackboard eraser with dust absorption function according to claim 1, characterized in that the wheel (1) is externally provided with an anti-slip sleeve made of an anti-slip material with elasticity.
4. The mechanical dust-absorbing blackboard eraser according to claim 1, wherein the third through hole is provided with an air guide pipe (8), so that the blade (9), the pawl (10) and the blade connecting piece (11) are positioned in the air guide pipe (8).
5. The blackboard eraser with mechanical dust absorption according to claim 1, characterized in that the rotating device further comprises a first gear (12) and a second gear (13), the rotating shaft is composed of a first rotating shaft (14) and a second rotating shaft (15), one end of the first rotating shaft (14) is connected with the outer shell (4), the other end is connected with the first gear (12), the rotating wheel (1) is connected with the first rotating shaft (14), one end of the second rotating shaft (15) is connected with the second gear (13), the other end is connected with the pawl (10), the pawl (10) is engaged with the ratchet inside the unidirectional exhaust fan, the first gear (12) and the second gear (13) are engaged to form a gear transmission system, and the diameter of the first gear (12) is larger than that of the second gear (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110722117.0A CN113561684B (en) | 2021-06-28 | 2021-06-28 | Mechanical dust-absorbing blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110722117.0A CN113561684B (en) | 2021-06-28 | 2021-06-28 | Mechanical dust-absorbing blackboard eraser |
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| Publication Number | Publication Date |
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| CN113561684A true CN113561684A (en) | 2021-10-29 |
| CN113561684B CN113561684B (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110722117.0A Active CN113561684B (en) | 2021-06-28 | 2021-06-28 | Mechanical dust-absorbing blackboard eraser |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001039089A (en) * | 1999-07-29 | 2001-02-13 | Servo Technos:Kk | Erasing device |
| CN204870247U (en) * | 2015-07-30 | 2015-12-16 | 唐山学院 | Mechanical type double round is dust removal blackboard eraser |
| CN106346993A (en) * | 2016-08-29 | 2017-01-25 | 江苏大学 | Mechanical dust-proof eraser |
| CN106626917A (en) * | 2017-02-13 | 2017-05-10 | 河北工业大学 | Blackboard eraser capable of collecting dust automatically |
| CN107599703A (en) * | 2017-11-02 | 2018-01-19 | 刘晓东 | A kind of mechanical dust absorption blackboard eraser |
| CN108909296A (en) * | 2018-06-26 | 2018-11-30 | 武汉理工大学 | Purely mechanical based on planetary gear train can turn to green energy conservation blackboard eraser |
| CN110789256A (en) * | 2019-11-05 | 2020-02-14 | 唐山师范学院 | Eraser without flying dust |
-
2021
- 2021-06-28 CN CN202110722117.0A patent/CN113561684B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001039089A (en) * | 1999-07-29 | 2001-02-13 | Servo Technos:Kk | Erasing device |
| CN204870247U (en) * | 2015-07-30 | 2015-12-16 | 唐山学院 | Mechanical type double round is dust removal blackboard eraser |
| CN106346993A (en) * | 2016-08-29 | 2017-01-25 | 江苏大学 | Mechanical dust-proof eraser |
| CN106626917A (en) * | 2017-02-13 | 2017-05-10 | 河北工业大学 | Blackboard eraser capable of collecting dust automatically |
| CN107599703A (en) * | 2017-11-02 | 2018-01-19 | 刘晓东 | A kind of mechanical dust absorption blackboard eraser |
| CN108909296A (en) * | 2018-06-26 | 2018-11-30 | 武汉理工大学 | Purely mechanical based on planetary gear train can turn to green energy conservation blackboard eraser |
| CN110789256A (en) * | 2019-11-05 | 2020-02-14 | 唐山师范学院 | Eraser without flying dust |
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| Publication number | Publication date |
|---|---|
| CN113561684B (en) | 2023-05-26 |
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