CN106346993A - Mechanical dust-proof eraser - Google Patents
Mechanical dust-proof eraser Download PDFInfo
- Publication number
- CN106346993A CN106346993A CN201610737093.5A CN201610737093A CN106346993A CN 106346993 A CN106346993 A CN 106346993A CN 201610737093 A CN201610737093 A CN 201610737093A CN 106346993 A CN106346993 A CN 106346993A
- Authority
- CN
- China
- Prior art keywords
- wheel
- stud
- blackboard eraser
- great circle
- scrubbing brush
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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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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- Cleaning In General (AREA)
Abstract
The invention refers to a mechanical dust-proof eraser, comprising a scrubbing brush and an eraser shell, wherein the scrubbing brush is full of gaps, the eraser shell has clapboard inside, the upward side of clapboard has gear drive mechanism which can make the primary fan and secondary fan turn, the downward side of clapboard has primary fan and secondary fan, wherein the primary fan and secondary fan are all facing the gaps on the scrubbing brush. The technical proposal of eraser completely uses the friction between eraser and blackboard as power source during using without electricity or changing battery which has lower cost. In additional, the eraser can also realize multi-level acceleration and guarantee the rotary speed of the fan, adequate suction of the two fans to the greatest extent possible.
Description
Technical field
The present invention relates to a kind of mechanical type dust-proof blackboard eraser is it is adaptable to the place of various employing chalk-writing.
Background technology
With the development of modern science and technology, multimedia teaching has more and more come into our teaching classroom,
And there is the trend progressively replacing traditional writing on the blackboard teaching method.Even so, for a lot of courses, multimedia mode is imparted knowledge to students
Effect is simultaneously inconspicuous, such as mathematics, English etc..Therefore, traditional traditional instruction can not possibly be fully substituted.However, traditional writing on the blackboard
The healthy of student and teacher in the dust serious harm producing in teaching process, despite the presence of dust-free chalk,
But the dust wafting in its wiping process is still extremely serious, become the big killer threatening student and teacher's health.
At present, the research with regard to blackboard eraser mainly has a following direction both at home and abroad:
(1) pure fan blackboard eraser.A small fan is designed on blackboard eraser.When firmly erasing the board, the power source of motor is relied on to drive
Dust under wiping is blown away by small fan air draft.This fan is covered with a cover, and three faces are stuffy, and the wind so producing is just permissible
Only blow to a direction.This design is not still solving the problems, such as dust pollution although all of dust is blown using central
To same direction, dust finally also can fly away in classroom.
(2) automatic dust absorption chalkboard eraser.Using principles such as magnetic force, whole blackboard is reequiped, process magnetic after blackboard
Adsorbent equipment.Word on blackboard can automatically be wiped by this automatic blackboard eraser, and can sponge generation in wiping process
Dust.Its ultimate principle is: a special strip blackboard eraser is fixed on the top of the automatic umbrella stem of two Gent systems.Special one kind again
Lock, in order to control the button in umbrella stem.During blackboard wiping, the clip on belt wheel plank is pulled upwardly and is pressed in strip blackboard eraser
On, blackboard eraser so can be made to blackboard to have certain normal pressure.During blackboard eraser work, foam-rubber cushion (has been got wet and before the class by hydraulic pressure
Extrude) by moving back and forth on blackboard under the drive of blackboard eraser with clip, the word on blackboard is wiped, simultaneously by
The dust absorbing of wiping is fallen by the humidity of water.The automatic blackboard eraser of this design can run into problems and leads to implementing
Use is not convenient.First, its motility is not high.In teaching process, how to need to preserve a part of content and only wipe out
Cannot realize during another part content.It is whole blackboards that its operation principle leads to its sphere of action, rather than wiping is arbitrarily thought
Part to be wiped out；Secondly, get wet after water and while adsorption of dust, also lead to blackboard to get wet, equally can affect teaching efficiency and
Effect；Additionally, this wiping blackboard structure is complicated, high cost and not easy care.
(3) windshield wiper type eraser.A kind of blackboard eraser being capable of automatic blackboard cleaning, its technical characteristic is will be black for a special strip
Blackboard eraser is fixed on the top of the automatic umbrella stem of two Gents；One block length bar (s pole) magnetic is fixed on the left surface of strip blackboard eraser
Ferrum, also one piece therewith identical Magnet be fixed on wall on the left of blackboard.Its operation principle is: special strip blackboard eraser
Rely on the repulsive force that the spring force in automatic umbrella stem and Magnet produce to act on realizing it to move back and forth on blackboard, thus will
Writing on blackboard wipes out.Implement difficulty big.First, larger change to be done on blackboard, not only increase extra cost,
And feasibility is not high.Secondly, complicated and excessively gaudy, the easily attention of impact student, fall are built in the design of this method
Low teaching efficiency.
(4) automatic blackboard eraser.Wipe the blackboard eraser in direction using remote control control.Its operation principle is: with four electricity
Machine drives, and two of which motor is contained on a framework equally big with blackboard, and so that a lock piece work is gone up by decelerator,
Lower movement, two other motor makes the soft blanket of a row move in a circle, thus reaching the effect of writing on blackboard wiping.So, when
When needing to erase the board, it is no need for manually using blackboard eraser, but passes through controlling switch, started using the place that it moves to needs
Wipe chalk writing.In place of this design equally brings inconvenience to user.First, in wiping process, opened by controlling
Close to need when positioning and need to wipe position to waste the substantial portion of time, have a strong impact on teaching efficiency；Secondly, four motors
Power consumption is very big, wastes the energy；Additionally, motor noise is big, affect teaching efficiency, and its construction is complicated, installs and maintenance cost
Height, is unfavorable for widely using.
In view of existing blackboard eraser has the various deficiencies of design aspect, the present invention is changed on the basis of traditional blackboard wiping
Enter, realize the conversion of internal structure rotation direction by the cooperation of two pairs of bevel gears, cooperation two simultaneously comes to freewheel clutch
Ensure the orientation steady running of internal structure, cooperated by different size of gear, increased gear ratio to greatest extent,
Ensure that the rotating speed of fan, thus reaching the purpose of dedusting.And the baffle design of scrubbing brush both sides, then further limit and used
Airborne dust problem in journey, makes the dustproof effect of blackboard eraser maximize.
Content of the invention
It is an object of the invention to provide a kind of structure is simple, dust-proof effect more preferable mechanical type dust-proof blackboard eraser.
For achieving the above object, the technical scheme that this utility model is taken is: a kind of mechanical type dust-proof blackboard eraser, bag
Rubbing board brush and blackboard eraser shell, described scrubbing brush spreads all over gap, and described blackboard eraser inside the shell is provided with dividing plate, and the two of described scrubbing brush
End is respectively equipped with the first great circle wheel and the second great circle wheel, and described first great circle wheel and described second great circle wheel are each attached to blackboard eraser
On shell；The wheel rim of described first great circle wheel and described second great circle wheel protrudes outside described scrubbing brush, described first great circle wheel and
On described second great circle wheel, correspondence is provided with the first roundlet wheel of ratchet and the second roundlet wheel with ratchet respectively, and described first
Roundlet wheel and described second roundlet wheel are fixed on dividing plate, described first roundlet wheel and described first great circle wheel engage direction with
Described second roundlet wheel is in opposite direction with engaging of described second great circle wheel；Described first roundlet wheel has been fixedly and coaxially connected first
Bevel gear, described second roundlet wheel has been fixedly and coaxially connected second bevel gear, and described first bevel gear is engaged with third hand tap gear,
Described second bevel gear is engaged with the 4th bevel gear, and described third hand tap gear has been fixedly and coaxially connected the first stud wheel, and described
Four bevel gears have been fixedly and coaxially connected the second stud wheel, and described first stud wheel is engaged with the 3rd stud wheel, described second post tooth
Wheel is engaged with the 4th stud wheel；Described 3rd stud wheel has been fixedly and coaxially connected the 5th stud wheel, and described 4th stud wheel is coaxial
It is fixedly connected with the 6th stud wheel, described 5th stud wheel is engaged with the first breast wheel with described 6th stud wheel simultaneously, described
First breast wheel is coaxially connected with the second breast wheel, described second breast wheel two ends simultaneously with the 7th stud wheel and the 8th stud wheel
Engagement, described 7th stud wheel is coaxially connected with the first fan, described 8th stud wheel is coaxially connected with the second fan；Institute
State the first fan and described second fan is located at and rectifies to the gap on described scrubbing brush under dividing plate.
In such scheme, the two ends of described scrubbing brush all offer the first square through hole and the second square through hole, and described first
The wheel rim of great circle wheel is located in described first square through hole, and the wheel rim of described second great circle wheel is located at described second square through hole
Interior.
In such scheme, two other face of described scrubbing brush is equipped with eaves shape baffle plate.
In such scheme, circular air-vent is left in the both sides of described blackboard eraser shell.
In such scheme, inside described blackboard eraser shell, adhere to sponge.
In such scheme, described first stud wheel with the centrage line of described 3rd stud wheel with horizontal angle is
21°；Between the gear shaft centre line line of described second stud wheel and described 4th stud wheel and horizontal line, angle is 21 °.
Beneficial effects of the present invention: (1) be used blackboard eraser to be used completely during with the frictional force of seriticker as power
Source, need not be energized or change battery, and use cost is lower.(2) blackboard eraser internal structure is in a center of symmetry and non-axis symmetry it is ensured that
Space availability ratio, structure is compacter, and gear ratio is higher.(3) multistage acceleration, ensures rotation speed of the fan to greatest extent it is ensured that inhaling
Power size.(4) freewheel clutch using it is ensured that the directional rotating of its internal structure is it is ensured that practical function.(5) scrubbing brush two
The baffle design of side, improves the dust raising phenomenon during use, optimizes blackboard eraser dust removing effects further.
Brief description
Fig. 1 is the 3 dimensional drawing of apparatus of the present invention.
Fig. 2 is apparatus of the present invention internal drive system schematic diagram.
Fig. 3 is apparatus of the present invention internal drive system tomograph.
Fig. 4 is engaging structure schematic diagram between the first great circle wheel of apparatus of the present invention and the first roundlet wheel.
Fig. 5 be the dividing plate of apparatus of the present invention, first bevel gear, second bevel gear and the first roundlet wheel, the second roundlet wheel it
Between position assumption diagram.
Fig. 6 is the top view of apparatus of the present invention.
In figure: 1. scrubbing brush；1-1. gap；1-2. first square through hole；1-3. second square through hole；1-4. eaves shape keeps off
Plate；2. blackboard eraser shell；3. dividing plate；4-1. the first great circle wheel；4-2. the second great circle wheel；5-1. the first roundlet wheel；5-2. second
Roundlet wheel；6-1. first bevel gear；6-2. second bevel gear；6-3. third hand tap gear；6-4. the 4th bevel gear；7-1. first
Stud wheel；7-2. second stud wheel；8-1. the 3rd stud wheel；8-2. the 4th stud wheel；9-1. the 5th stud wheel；9-2. the 6th post
Gear；10-1. the first breast wheel；10-2. the second breast wheel；11-1. the 7th stud wheel；11-2. the 8th stud wheel；12-1.
One fan；12-2. the second fan.
Specific embodiment
Below in conjunction with the accompanying drawings, technical scheme is described in detail.
As shown in Figures 1 to 5, the mechanical type dust-proof blackboard eraser of the present invention, including scrubbing brush 1 and blackboard eraser shell 2, described
Gap 1-1 is spread all on scrubbing brush 1, in described blackboard eraser shell 2, is provided with dividing plate 3, it is square that the two ends of described scrubbing brush 1 all offer first
The wheel rim of through hole 1-2 and the second square through hole 1-3, described first great circle wheel 4-1 is located in described first square through hole 1-2, institute
The wheel rim stating the second great circle wheel 4-2 is located in described second square through hole 1-3.Described first great circle wheel 4-1 and described second largest
Circle wheel 4-2 is each attached on blackboard eraser shell 2；The wheel rim of described first great circle wheel 4-1 and described second great circle wheel 4-2 protrudes institute
State outside scrubbing brush 1, on described first great circle wheel 4-1 and described second great circle wheel 4-2, correspondence is provided with the first of ratchet respectively
Roundlet wheel 5-1 and the second roundlet wheel 5-2 with ratchet, described first roundlet wheel 5-1 and described second roundlet wheel 5-2 be fixed on every
On plate 3, described first roundlet wheel 5-1 has been fixedly and coaxially connected first bevel gear 6-1, and described second roundlet wheel 5-2 coaxially fixes
Be connected with second bevel gear 6-2, described first bevel gear 6-1 is engaged with third hand tap gear 6-3, described second bevel gear 6-2 with
4th bevel gear 6-4 engagement, described third hand tap gear 6-3 has been fixedly and coaxially connected the first stud wheel 7-1, described 4th bevel gear
6-4 has been fixedly and coaxially connected the second stud wheel 7-2, and described first stud wheel 7-1 is engaged with the 3rd stud wheel 8-1, and described second
Stud wheel 7-2 is engaged with the 4th stud wheel 8-2；Described 3rd stud wheel 8-1 has been fixedly and coaxially connected the 5th stud wheel 9-1, institute
State the 4th stud wheel 8-2 and be fixedly and coaxially connected the 6th stud wheel 9-2, described 5th stud wheel 9-1 and described 6th stud wheel
9-2 is engaged with the first breast wheel 10-1 simultaneously, and described first breast wheel 10-1 is coaxially connected with the second breast wheel 10-2, and described
Two breast wheel 10-2 two ends are engaged with the 7th stud wheel 11-1 and the 8th stud wheel 11-2 simultaneously, on described 7th stud wheel 11-1
It is coaxially connected with the first fan 12-1, described 8th stud wheel 11-2 is coaxially connected with the second fan 12-2；Described first wind
Fan 12-1 and described second fan 12-2 is located at dividing plate and rectifies to the gap 1-1 on described scrubbing brush 1 for 3 times.Preferably, described scrubbing brush
Eaves shape baffle plate 1-4 is equipped with 1 two other face.Circular air-vent is left in the both sides of described blackboard eraser shell 2.Described black
Blackboard eraser shell 2 inner side attachment sponge.The centrage line of described first stud wheel 7-1 and described 3rd stud wheel 8-1 and level
The angle of line is 21 °；The gear shaft centre line line of described second stud wheel 7-2 and described 4th stud wheel 8-2 and horizontal line
Between angle be 21 °.
Below detailed explanation and explanation are carried out to the know-why of technical scheme.
As shown in figure 3, this blackboard eraser power source be the first great circle wheel 4-1 and the second great circle wheel 4-2, during using and
The frictional force of seriticker is converted into the power of whole mechanism operating.At first great circle wheel 4-1 and the second great circle wheel 4-2 inner recess
Match as freewheel clutch with a first roundlet wheel 5-1 with ratchet and the second roundlet wheel 5-2 with ratchet respectively, both
The relation that cooperates is as shown in figure 4, the reverse cooperation of the two pairs of freewheel clutches.The unidirectional single moving process when blackboard eraser uses
In, the first great circle wheel 4-1 and the second great circle wheel 4-2 rotating in same direction, and now only have a pair of freewheel clutch to be in engagement,
Great circle wheel drive roundlet wheel rotating in same direction be whole mechanism provide power, another freewheel clutch big roundlet wheel is rotated backward,
I.e. great circle wheel idle running, does not hinder internal mechanism to operate.When blackboard eraser moves backward, two pairs of freewheel clutch working conditions are mutual
Exchange, still only a pair of freewheel clutch is in engagement, and internal mechanism rotation direction is constant.Meanwhile, big roundlet wheel
Between using internal messing rather than rotate coaxially, increase gear ratio between the two to greatest extent.Shown in Fig. 3, first bevel gear 6-1
With third hand tap gear 6-3, second bevel gear 6-2 and the 4th bevel gear 6-4 for two to intermeshing bevel gear, by vertical direction
Motion be converted to the motion of horizontal direction, different size of bevel gear cooperation also plays a part to increase gear ratio.Rotating
During being delivered to fan, employ multipair different size of straight spur gear and engage each other cooperation transmission, play multistage adding
The effect of speed, ensure that the velocity of rotation of fan to greatest extent it is ensured that size to dust suction.As shown in fig. 6, it is described
The centrage line of the first stud wheel 7-1 and described 3rd stud wheel 8-1 and horizontal angle are 21 °；Described second post tooth
Between the gear shaft centre line line of wheel 7-2 and described 4th stud wheel 8-2 and horizontal line, angle is 21 °.It is computed, blackboard eraser
Internal gear is pressed this angle arrangement and can be utilized its inner space to greatest extent it is ensured that the compactedness maximum limit simultaneously of its structure
The utilization space of degree increases gear ratio.
Due to one dividing plate 3 of setting in blackboard eraser shell 2 shown in Fig. 3, dust can be kept apart with top drive mechanism
Come, ensure that transmission environment to a certain extent, also the first roundlet wheel 5-1, the second roundlet wheel 5-2 are played a supportive role simultaneously.
Scrubbing brush 1 two ends shown in Fig. 3 leave the first square through hole 1-2 and the second square through hole 1-3 it is ensured that two great circle wheels
With being fully contacted of blackboard.Scrubbing brush base plate spreads all over gap 1-1 it is ensured that dust can smoothly be sucked.Scrubbing brush both sides are provided with eaves
Shape baffle plate 1-4, can reduce the dust raising phenomenon during use to a certain extent.Blackboard eraser shell 2 both sides are left circular saturating
Pore, and inner side attachment sponge.Both ensure that the circulation of inner air, simultaneously sponge can Chalk-dust filtering, make the powder of absorption
Dirt will not blow in the air again.
Claims (6)
1. a kind of mechanical type dust-proof blackboard eraser, including scrubbing brush (1) and blackboard eraser shell (2) it is characterised in that described scrubbing brush (1)
On spread all over gap (1-1), be provided with dividing plate (3) in described blackboard eraser shell (2), described scrubbing brush (1) be respectively arranged at two ends with first
Great circle wheel (4-1) and the second great circle wheel (4-2), described first great circle wheel (4-1) and described second great circle wheel (4-2) are each attached to
On blackboard eraser shell (2)；The wheel rim of described first great circle wheel (4-1) and described second great circle wheel (4-2) protrudes described scrubbing brush (1)
On outside, described first great circle wheel (4-1) and described second great circle wheel (4-2), correspondence is provided with the first roundlet of ratchet respectively
Wheel (5-1) and the second roundlet wheel (5-2) with ratchet, described first roundlet wheel (5-1) and described second roundlet wheel (5-2) are fixing
On dividing plate (3), described first roundlet wheel (5-1) has been fixedly and coaxially connected first bevel gear (6-1), described second roundlet wheel
(5-2) it has been fixedly and coaxially connected second bevel gear (6-2), described first bevel gear (6-1) is engaged with third hand tap gear (6-3),
Described second bevel gear (6-2) is engaged with the 4th bevel gear (6-4), and described third hand tap gear (6-3) has been fixedly and coaxially connected
One stud wheel (7-1), described 4th bevel gear (6-4) has been fixedly and coaxially connected the second stud wheel (7-2), described first stud wheel
(7-1) engage with the 3rd stud wheel (8-1), described second stud wheel (7-2) is engaged with the 4th stud wheel (8-2)；Described 3rd
Stud wheel (8-1) has been fixedly and coaxially connected the 5th stud wheel (9-1), and described 4th stud wheel (8-2) has been fixedly and coaxially connected
Six stud wheels (9-2), described 5th stud wheel (9-1) and described 6th stud wheel (9-2) simultaneously with the first breast wheel (10-1)
Engagement, described first breast wheel (10-1) is coaxially connected with the second breast wheel (10-2), described second breast wheel (10-2) two ends
Engage with the 7th stud wheel (11-1) and the 8th stud wheel (11-2) simultaneously, described 7th stud wheel (11-1) is coaxially connected with
First fan (12-1), described 8th stud wheel (11-2) is coaxially connected with the second fan (12-2)；Described first fan
(12-1) it is located at and rectifies to the gap (1-1) on described scrubbing brush (1) under dividing plate (3) with described second fan (12-2).
2. a kind of mechanical type dust-proof blackboard eraser according to claim 1 is it is characterised in that the two ends of described scrubbing brush (1) are equal
Offer the first square through hole (1-2) and the second square through hole (1-3), the wheel rim of described first great circle wheel (4-1) is positioned at described
In first square through hole (1-2), the wheel rim of described second great circle wheel (4-2) is located in described second square through hole (1-3).
3. a kind of mechanical type dust-proof blackboard eraser according to claim 1 and 2 it is characterised in that described scrubbing brush (1) in addition
Eaves shape baffle plate (1-4) are equipped with two faces.
4. a kind of mechanical type dust-proof blackboard eraser according to claim 1 and 2 is it is characterised in that described blackboard eraser shell (2)
Both sides leave circular air-vent.
5. a kind of mechanical type dust-proof blackboard eraser according to claim 4 is it is characterised in that described blackboard eraser shell (2) is interior
Sponge is adhered in side.
6. a kind of mechanical type dust-proof blackboard eraser according to claim 1 and 2 is it is characterised in that described first stud wheel (7-
1) it is 21 ° with the centrage line of described 3rd stud wheel (8-1) with horizontal angle；Described second stud wheel (7-2) with
Between the gear shaft centre line line of described 4th stud wheel (8-2) and horizontal line, angle is 21 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737093.5A CN106346993A (en) | 2016-08-29 | 2016-08-29 | Mechanical dust-proof eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610737093.5A CN106346993A (en) | 2016-08-29 | 2016-08-29 | Mechanical dust-proof eraser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106346993A true CN106346993A (en) | 2017-01-25 |
Family
ID=57855325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610737093.5A Pending CN106346993A (en) | 2016-08-29 | 2016-08-29 | Mechanical dust-proof eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106346993A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976341A (en) * | 2017-04-07 | 2017-07-25 | 西南交通大学 | A kind of mechanical dust-absorbing blackboard brush |
| CN108394218A (en) * | 2018-05-09 | 2018-08-14 | 浙江交通职业技术学院 | A kind of blackboard eraser that wiping dedusting is carried out to blackboard letter written with chalk for teaching |
| TWI659868B (en) * | 2017-11-17 | 2019-05-21 | 國立彰化師範大學 | Dry-wet mechanical wiping board |
| CN110466275A (en) * | 2019-08-08 | 2019-11-19 | 广东工业大学 | A kind of dust-absorbing blackboard brush |
| CN113561684A (en) * | 2021-06-28 | 2021-10-29 | 河海大学 | Mechanical dust-absorbing blackboard eraser |
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| CN2064310U (en) * | 1990-05-19 | 1990-10-24 | 李廷刚 | Eraser without dust |
| CN201998703U (en) * | 2011-02-17 | 2011-10-05 | 张帅 | Electrostatic dust absorption blackboard eraser |
| KR20120020785A (en) * | 2010-08-31 | 2012-03-08 | 이남연 | Fabrication method of friction system blackboard eraser |
| CN203567427U (en) * | 2013-10-29 | 2014-04-30 | 田成祥 | Mechanical blackboard eraser free of power dissipation |
| CN103991318A (en) * | 2014-05-07 | 2014-08-20 | 江苏大学 | Pure mechanical type environmental-friendly dust collecting blackboard eraser |
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2016
- 2016-08-29 CN CN201610737093.5A patent/CN106346993A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2064310U (en) * | 1990-05-19 | 1990-10-24 | 李廷刚 | Eraser without dust |
| KR20120020785A (en) * | 2010-08-31 | 2012-03-08 | 이남연 | Fabrication method of friction system blackboard eraser |
| CN201998703U (en) * | 2011-02-17 | 2011-10-05 | 张帅 | Electrostatic dust absorption blackboard eraser |
| CN203567427U (en) * | 2013-10-29 | 2014-04-30 | 田成祥 | Mechanical blackboard eraser free of power dissipation |
| CN103991318A (en) * | 2014-05-07 | 2014-08-20 | 江苏大学 | Pure mechanical type environmental-friendly dust collecting blackboard eraser |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106976341A (en) * | 2017-04-07 | 2017-07-25 | 西南交通大学 | A kind of mechanical dust-absorbing blackboard brush |
| CN106976341B (en) * | 2017-04-07 | 2018-07-31 | 西南交通大学 | A kind of mechanical dust-absorbing blackboard brush |
| TWI659868B (en) * | 2017-11-17 | 2019-05-21 | 國立彰化師範大學 | Dry-wet mechanical wiping board |
| CN108394218A (en) * | 2018-05-09 | 2018-08-14 | 浙江交通职业技术学院 | A kind of blackboard eraser that wiping dedusting is carried out to blackboard letter written with chalk for teaching |
| CN110466275A (en) * | 2019-08-08 | 2019-11-19 | 广东工业大学 | A kind of dust-absorbing blackboard brush |
| CN110466275B (en) * | 2019-08-08 | 2021-04-23 | 广东工业大学 | Dust-absorbing blackboard eraser |
| CN113561684A (en) * | 2021-06-28 | 2021-10-29 | 河海大学 | Mechanical dust-absorbing blackboard eraser |
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