CN103978817A - Mechanical vacuuming blackboard eraser - Google Patents
Mechanical vacuuming blackboard eraser Download PDFInfo
- Publication number
- CN103978817A CN103978817A CN201410220713.9A CN201410220713A CN103978817A CN 103978817 A CN103978817 A CN 103978817A CN 201410220713 A CN201410220713 A CN 201410220713A CN 103978817 A CN103978817 A CN 103978817A
- Authority
- CN
- China
- Prior art keywords
- wiping
- dust
- wiping body
- blackboard eraser
- sealed
- 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.)
- Granted
Links
- 239000000428 dust Substances 0.000 claims abstract description 110
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 29
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 16
- 239000000806 elastomer Substances 0.000 claims description 13
- 238000007667 floating Methods 0.000 claims description 7
- 230000000994 depressogenic effect Effects 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 244000227633 Ocotea pretiosa Species 0.000 description 1
- 235000004263 Ocotea pretiosa Nutrition 0.000 description 1
- 235000012813 breadcrumbs Nutrition 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a mechanical vacuuming blackboard eraser. The mechanical vacuuming blackboard eraser comprises a housing; a wiping mechanism is fixedly arranged at the front end of the housing; a dust storage cabin is formed at the rear end of the housing; the wiping mechanism comprises two wiping bodies which are arranged on the left side and the right side in a parallel mode respectively; the front end of each wiping body is connected with a front fixed seat; the rear end of each wiping body is connected with a rear fixed seat; the two wiping bodies can rotate relative to the front fixed seats and the rear fixed seats; the top of each wiping body extends out of the housing; a gap is formed between the two wiping bodies so as to ensure that the two wiping bodies can rotate independent to each other. According to the mechanical vacuuming blackboard eraser, the classroom environment can be purified, the health of teachers and students can be protected, the cleaning effect is good in comparison with the traditional blackboard eraser, dust emissions are not caused, and the environment-friendly and energy-saving effect is good in comparison with an electric blackboard eraser.
Description
Technical field
The present invention relates to a kind of blackboard eraser, be specifically related to a kind of mechanical type dust absorption blackboard eraser.
Background technology
Now widely used blackboard eraser, generally adopts felt and flat board to make; The outer bread crumb napped cotton fabric of some employing foams; Also having a kind of is the dual-purpose cleanable blackboard eraser of blank blackboard, but need to coordinate watery chalk to use.
This blackboard eraser, during use, chalk dust flies around, and both contaminated environment, also can work the mischief to academics and students's health.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of mechanical type dust absorption blackboard eraser, and it can solve while erasing the board because chalk dust flies upward the pollution problem causing.
For solving the problems of the technologies described above, the technical solution of mechanical type dust absorption blackboard eraser of the present invention is:
Comprise housing 1, the front end of housing 1 is fixedly installed Wiping mechanism 2, and the rear end of housing 1 forms ash-storing bin 4; Wiping mechanism 2 comprises two wiping bodies 21 that left and right be arranged in parallel, holder 22 before the front end of wiping body 21 connects, holder 23 after the rear end of wiping body 21 connects; Two wiping bodies 21 can rotate with respect to forward and backward holder 22,23; Stretch out from housing 1 at the top of wiping body 21, between two wiping bodies 21, is provided with gap, to guarantee the two separate rotation; The length of wiping body 21 is less than the length of housing 1; In each wiping body 21, be respectively arranged with unilateral bearing; The unilateral bearing rotation direction of two wiping bodies 21 is contrary, and two wiping bodies 21 are inwardly rotated; The unilateral bearing of wiping body 21 is arranged in movable axis bearing 24; Wiping body 21 connects a fixed axis 30 by its movable axis bearing 24, and the two ends of fixed axis 30 are fixedly connected with respectively forward and backward holder 22,23; Movable axis bearing 24 connects sealed support 25; The outside of two sealed supports 25 of same wiping body 21 is connected to floating seal stake body by roller rods 251, is arranged with sealed roller 28 in roller rods 251; Sealed roller 28 is positioned at the outside of this wiping body 21; Sealed support 25 can rotate around fixed axis 30, drives sealed roller 28 to move up and down; The below of each wiping body 21 is respectively arranged with dust removal brush 26; Dust removal brush 26 is fixedly installed in dust removal brush rotating shaft, and dust removal brush rotating shaft connects dust removal brush 26 by elastomer; The two ends of dust removal brush rotating shaft are flexibly connected with forward and backward holder 22,23, and dust removal brush rotating shaft can be rotated with respect to forward and backward holder 22,23; Elastomer can be controlled the angle of dust removal brush 26, makes dust removal brush 26 lean against all the time the outer surface of wiping body 21; The outside, below of each wiping body 21 is also provided with dust block board 27; Dust block board 27 is positioned at the outside of dust removal brush 26; Dust block board 27 is fixedly installed in dust block board rotating shaft, and dust block board rotating shaft connects dust block board 27 by elastomer; The two ends of dust block board rotating shaft are flexibly connected with forward and backward holder 22,23, and dust block board rotating shaft can be rotated with respect to forward and backward holder 22,23; Dust block board 27 is provided with pressing plate head 271 with the contact site of wiping body 21; Elastomer can be controlled the angle of dust block board 27, and the pressing plate head 271 of dust block board 27 is pressed on wiping body 21 all the time.
Described rear holder 23 is provided with hinge; Holder 23 after the inner side of back-end sealing support 25 connects by back-moving spring 31, the outside top of back-end sealing support 25 is stretched out from housing 1; Back-end sealing support 25 matches with one end of hinge pole, and the other end of hinge pole is fixedly connected with the hinge of rear holder 23; Back-end sealing support 25 can be controlled the hinge folding of rear holder 23.
It between described sealed support 25 and movable axis bearing 24, is coaxial connection; The inner side of described sealed support 25 is provided with handle 252, and the corresponding site of movable axis bearing 24 is provided with fixture block 242; When wiping body 21 forwards are when stressed, drive its unilateral bearing to rotate, 25 pulling force that are subject to back-moving spring 31 of sealed support, movable axis bearing 24 and the relative stationary state of sealed support 25 maintenance; When wiping body 21 reverse when stressed, its unilateral bearing is motionless, movable axis bearing 24 is with respect to fixed axis 30 reverse rotation one angles under the effect of this opposite force, and the fixture block 242 of movable axis bearing 24 props up the handle 252 of sealed support 25, thereby the sealed roller 28 of this wiping body 21 is depressed.
While erasing the board, described sealed roller 28 presses down, and back-end sealing support 25 drives hinge to open by hinge pole, and now chalk dust can fall in ash-storing bin 4; While stopping erasing the board, sealed roller 28 is not subject to external force, and back-moving spring 31 resets back-end sealing support 25, and hinge is closed.
Between described floating seal stake body and the inwall of housing 1, be provided with a sealing strip 29.
The top of described ash-storing bin 4 is provided with ash-storing bin lid 3.
Described wiping body 21 comprises a cylindrical cavernous body, and the center of cylindrical cavernous body is fixedly installed a pipe; Described unilateral bearing is set in pipe.
The skin of described sealed roller 28 is enclosed with rubber.
Described pressing plate head 271 comprises one deck tweed, and the surface of tweed is provided with one deck plastic layer.
The technique effect that the present invention can reach is:
The present invention does not in use need electric energy, without being equipped with any power supply, and not only energy-conserving and environment-protective, and also simple in structure, with low cost, easy to use, be easy to apply.
The present invention in erasing chalk word by dust collection to housing, the organic efficiency of dust is high, simultaneously can stop flying upward of dust.
The present invention can obtain blackboard eraser cleaner, and surface does not have floating dust.
Wiping body of the present invention can be changed when may wear to a certain degree, and wiping body is with low cost.
The present invention can purify classroom environment, and protection teachers and students are healthy; Than traditional blackboard eraser, wipe totally, there is no dust from flying, again than the environmental protection and energy saving of driven blackboard sassafras.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the schematic diagram of mechanical type dust absorption blackboard eraser of the present invention;
Fig. 2 is decomposing schematic representation of the present invention;
Fig. 3 is the decomposing schematic representation of Wiping mechanism of the present invention;
Fig. 4 is end view of the present invention;
Fig. 5 is the partial exploded view of Wiping mechanism of the present invention;
Fig. 6 is the partial schematic diagram of Wiping mechanism of the present invention;
Fig. 7 is another local schematic diagram of Wiping mechanism of the present invention;
Fig. 8 is the schematic diagram of other end of the present invention.
Description of reference numerals in figure:
1 is housing, and 2 is Wiping mechanism,
3 is ash-storing bin lid, and 4 is ash-storing bin,
21 is wiping body, and 22 is front holder,
23 is rear holder, and 24 is movable axis bearing,
25 is sealed support, and 26 is dust removal brush,
27 is dust block board, and 28 is sealed roller,
242 is fixture block, and 271 is pressing plate head,
251 is roller rods, and 252 is handle,
29 is sealing strip, and 30 is fixed axis,
31 is back-moving spring.
The specific embodiment
As shown in Figure 1 and Figure 2, mechanical type dust absorption blackboard eraser of the present invention, comprises housing 1, and the front end of housing 1 is fixedly installed Wiping mechanism 2, and the rear end of housing 1 forms ash-storing bin 4; The top of ash-storing bin 4 is provided with ash-storing bin lid 3;
As shown in Figure 3, Figure 4, Wiping mechanism 2 comprises two cylindric wiping bodies 21 that left and right be arranged in parallel, holder 22 before the front end of wiping body 21 connects, holder 23 after the rear end of wiping body 21 connects; Two wiping bodies 21 can rotate with respect to forward and backward holder 22,23; Forward and backward holder 22,23 is fixedly connected with housing 1; Stretch out from housing 1 at the top of wiping body 21, between two wiping bodies 21, is provided with gap, to guarantee the two separate rotation; The length of wiping body 21 is less than the length of housing 1;
Wiping body 21 comprises a cylindrical cavernous body, and the center of cylindrical cavernous body is provided with runs through through hole, runs through and in through hole, is fixedly installed a pipe;
In the pipe of wiping body 21, be provided with unilateral bearing, the unilateral bearing rotation direction of two wiping bodies 21 is contrary, and two wiping bodies 21 are inwardly rotated; Be that left wiping body 21 can only turn clockwise under the effect of its unilateral bearing, and right wiping body 21 can only be rotated counterclockwise under the effect of its unilateral bearing;
The unilateral bearing of wiping body 21 is arranged in movable axis bearing 24, and wiping body 21 is connected and fixed axle 30 by its movable axis bearing 24, and the two ends of fixed axis 30 are fixedly connected with respectively forward and backward holder 22,23;
The coaxial sealed support 25 that connects of movable axis bearing 24, movable axis bearing 24 and sealed support 25 are embedded in forward and backward holder 22,23;
The outside of two sealed supports 25 of same wiping body 21 is connected to floating seal stake body by roller rods 251, is arranged with sealed roller 28 in roller rods 251; Sealed roller 28 is positioned at the outside of wiping body 21; The skin of sealed roller 28 is enclosed with soft rubber, to reduce noise;
The below of two wiping bodies 21 is respectively arranged with dust removal brush 26; Dust removal brush 26 is fixedly installed in dust removal brush rotating shaft, and dust removal brush rotating shaft connects dust removal brush 26 by elastomer; The two ends of dust removal brush rotating shaft are flexibly connected with forward and backward holder 22,23, and dust removal brush rotating shaft can be rotated with respect to forward and backward holder 22,23; Elastomer can be controlled the angle of dust removal brush 26, makes dust removal brush 26 lean against all the time the outer surface of wiping body 21;
The outside, below of two wiping bodies 21 is also provided with dust block board 27; Dust block board 27 is positioned at the outside of dust removal brush 26; Dust block board 27 is fixedly installed in dust block board rotating shaft, and dust block board rotating shaft connects dust block board 27 by another elastomer; The two ends of dust block board rotating shaft are flexibly connected with forward and backward holder 22,23, and dust block board rotating shaft can be rotated with respect to forward and backward holder 22,23; Dust block board 27 is provided with pressing plate head 271 with the contact site of wiping body 21, and pressing plate head 271 comprises one deck tweed, and the surface of tweed is provided with the plastic layer that one deck is smooth; Elastomer can be controlled the angle of dust block board 27, and the pressing plate head 271 of dust block board 27 is pressed on wiping body 21 all the time, even if wearing and tearing occur wiping body 21, also still can be pressed on wiping body 21;
Elastomer can be torsion spring, spring or extension spring;
As shown in Figure 5, the inner side of sealed support 25 is provided with handle 252, and the corresponding site of movable axis bearing 24 is provided with fixture block 242; When wiping body 21 forwards stressed (being subject to clockwise power as right wiping body 21 is subject to anticlockwise power or left wiping examination body 21) or two select one (or being that the direction that unilateral bearing can move is continuously positive direction), drive its unilateral bearing to rotate, 25 pulling force that are subject to back-moving spring 31 of sealed support, movable axis bearing 24 keeps relative stationary state with sealed support 25; When wiping body 21 reverse when stressed, its unilateral bearing is motionless, movable axis bearing 24 can be with respect to fixed axis 30 reverse rotation one angles under the effect of this opposite force, the fixture block 242 of movable axis bearing 24 props up the handle 252 of sealed support 25, thereby the sealed roller 28 of this wiping body 21 is depressed, as shown in Figure 6;
As shown in Figure 7, Figure 8, rear holder 23 is provided with hinge; Back-end sealing support 25(is positioned at the sealed support 25 of wiping body 21 rear ends) inner side by back-moving spring 31, connect after holder 23, stretch out from housing 1 in the outside of back-end sealing support 25; Back-end sealing support 25 matches with one end of hinge pole, and the other end of hinge pole is fixedly connected with the hinge of rear holder 23; Back-end sealing support 25 can be controlled the hinge folding of rear holder 23; When back-end sealing support 25 turns to certain stroke, one end of back-end sealing support 25 contact hinge poles is also pressed down, and drives hinge to rotate an angle, thereby hinge is opened;
While erasing the board, sealed roller 28 presses down, and after back-end sealing support 25 rotates, by hinge pole, drives hinge to open, and now chalk dust can fall in ash-storing bin 4 smoothly; While stopping erasing the board, sealed roller 28 is not subject to external force, and back-moving spring 31 resets back-end sealing support 25, and hinge is closed;
Between the inwall of floating seal stake body and housing 1, be provided with a sealing strip 29, the outside of sealed support 25 and the sealing between housing 1 inwall while producing from housing 1 for the outside at back-end sealing support 25, thus dust is sealed in housing 1; Sealing strip 29 adopts soft material;
When the chalk dust in ash-storing bin 4 is filled, open ash-storing bin lid 3 and poured out.。
Operation principle of the present invention is as follows:
By being pressed on blackboard, housing 1 left and right is swung back and forth two wiping bodies 21, under the effect of unilateral bearing, two wiping bodies 21 are alternately made unidirectional rotary motion; During wiping left (housing 1 moves from right to left), left wiping body 21 is clockwise Free-rolling under the effect of its unilateral bearing, first letter written with chalk surface one deck dust is taken away; Meanwhile, right wiping body 21 cannot be rotated with respect to movable axis bearing 24 by the constraint of its unilateral bearing, more remaining letter written with chalk is wiped clean; Under the effect of blackboard frictional force, right wiping body 21 and unilateral bearing and movable axis bearing 24 are whole can be around fixed axis 30 reverse rotation one fixed angles, meanwhile movable axis bearing 24 drives sealed support 25 to rotate to an angle around fixed axis 30, thereby right side sealed roller 28 is depressed, right side sealed roller 28 departs from blackboard panel, thereby avoid after right wiping body 21 wiped clean blackboards, sealed roller 28 pairs of blackboard panels in right side cause secondary pollution;
Left wiping body 21 is brought dust in housing 1 in the process of rolling, and when the dust removal brush 26 through housing 1 inwall, 26 pairs of left wiping body 21 outer surfaces of dust removal brush are cleared up, and left wiping body 21 produces after being cleaned down by dust removal brush 26 again;
Dust removal brush 26, when brushing the dust of wiping body 21 outer surfaces, can evoke dust and fly upward, and the dust block board 27 that is now positioned at dust removal brush 26 outsides first keeps off and falls major part, then by left side sealed roller 28, dust is completely enclosed within housing 1;
When wiping motion, when namely back-end sealing support 25 is depressed by movable axis bearing 24, back-end sealing support 25 drives hinge to open by hinge pole, makes to be brushed the dust falling and drops in ash-storing bin 4;
During wiping to the right, in like manner, right wiping body 21 counterclockwise Free-rolling under the effect of its unilateral bearing, first takes away letter written with chalk surface one deck dust (also cleaned last time static wipe the chalk dust that rear surface is left over) simultaneously; And left wiping body 21 cannot be rotated by the constraint of its unilateral bearing, so remaining chalk dust is cleaned, ash is being collected in ash-storing bin 4 simultaneously; Alternate cycles like this.
Claims (10)
1. a mechanical type dust absorption blackboard eraser, is characterized in that: comprise housing (1), the front end of housing (1) is fixedly installed Wiping mechanism (2), and the rear end of housing (1) forms ash-storing bin (4);
Wiping mechanism (2) comprises two wiping bodies (21) that left and right be arranged in parallel, holder (22) before the front end of wiping body (21) connects, holder (23) after the rear end of wiping body (21) connects; Two wiping bodies (21) can rotate with respect to forward and backward holder (22,23); Stretch out from housing (1) at the top of wiping body (21), between two wiping bodies (21), is provided with gap, to guarantee the two separate rotation; The length of wiping body (21) is less than the length of housing (1);
Each wiping body is respectively arranged with unilateral bearing in (21); The unilateral bearing rotation direction of two wiping bodies (21) is contrary, and two wiping bodies (21) are inwardly rotated;
The unilateral bearing of wiping body (21) is arranged in movable axis bearing (24); Wiping body (21) connects a fixed axis (30) by its movable axis bearing (24), and the two ends of fixed axis (30) are fixedly connected with respectively forward and backward holder (22,23);
Movable axis bearing (24) connects sealed support (25); The outside of two sealed supports (25) of same wiping body (21) is connected to floating seal stake body by roller rods (251), is arranged with sealed roller (28) in roller rods (251); Sealed roller (28) is positioned at the outside of this wiping body (21); Sealed support (25) can rotate around fixed axis (30), drives sealed roller (28) to move up and down;
The below of each wiping body (21) is respectively arranged with dust removal brush (26); Dust removal brush (26) is fixedly installed in dust removal brush rotating shaft, and dust removal brush rotating shaft connects dust removal brush (26) by elastomer; The two ends of dust removal brush rotating shaft are flexibly connected with forward and backward holder (22,23), and dust removal brush rotating shaft can be rotated with respect to forward and backward holder (22,23); Elastomer can be controlled the angle of dust removal brush (26), makes dust removal brush (26) lean against all the time the outer surface of wiping body (21);
The outside, below of each wiping body (21) is also provided with dust block board (27); Dust block board (27) is positioned at the outside of dust removal brush (26); Dust block board (27) is fixedly installed in dust block board rotating shaft, and dust block board rotating shaft connects dust block board (27) by elastomer; The two ends of dust block board rotating shaft are flexibly connected with forward and backward holder (22,23), and dust block board rotating shaft can be rotated with respect to forward and backward holder (22,23); Dust block board (27) is provided with pressing plate head (271) with the contact site of wiping body (21); Elastomer can be controlled the angle of dust block board (27), and the pressing plate head (271) of dust block board (27) is pressed on wiping body (21) all the time.
2. mechanical type dust absorption blackboard eraser according to claim 1, is characterized in that: described rear holder (23) is provided with hinge; Holder (23) after the inner side of back-end sealing support (25) connects by back-moving spring (31), the outside top of back-end sealing support (25) is stretched out from housing (1); Back-end sealing support (25) matches with one end of hinge pole, and the other end of hinge pole is fixedly connected with the hinge of rear holder (23); Back-end sealing support (25) can be controlled the hinge folding of rear holder (23).
3. mechanical type dust absorption blackboard eraser according to claim 2, is characterized in that: between described sealed support (25) and movable axis bearing (24), be coaxial connection; The inner side of described sealed support (25) is provided with handle (252), and the corresponding site of movable axis bearing (24) is provided with fixture block (242); When wiping body (21) forward is stressed, drive its unilateral bearing to rotate, sealed support (25) is only subject to the pulling force of back-moving spring (31), and movable axis bearing (24) keeps relative stationary state with sealed support (25); When wiping body (21) reverse when stressed, its unilateral bearing is motionless, movable axis bearing (24) counter-rotates an angle with respect to fixed axis (30) under the effect of this opposite force, the fixture block (242) of movable axis bearing (24) props up the handle (252) of sealed support (25), thereby the sealed roller (28) of this wiping body (21) is depressed.
4. mechanical type dust absorption blackboard eraser according to claim 2, it is characterized in that: while erasing the board, described sealed roller (28) presses down, and after back-end sealing support (25) rotates, by hinge pole, drives hinge to open, and now chalk dust can fall in ash-storing bin (4); While stopping erasing the board, sealed roller (28) is not subject to external force, and back-moving spring (31) resets back-end sealing support (25), and hinge is closed.
5. mechanical type dust absorption blackboard eraser according to claim 1, is characterized in that: between described floating seal stake body and the inwall of housing (1), be provided with a sealing strip (29).
6. mechanical type dust absorption blackboard eraser according to claim 1, is characterized in that: the top of described ash-storing bin (4) is provided with ash-storing bin lid (3).
7. mechanical type dust absorption blackboard eraser according to claim 1, is characterized in that: described wiping body (21) comprises a cylindrical cavernous body, and the center of cylindrical cavernous body is fixedly installed a pipe; Described unilateral bearing is set in pipe.
8. mechanical type dust absorption blackboard eraser according to claim 1, is characterized in that: the skin of described sealed roller (28) is enclosed with rubber.
9. mechanical type dust absorption blackboard eraser according to claim 1, is characterized in that: described pressing plate head (271) comprises one deck tweed, and the surface of tweed is provided with one deck plastic layer.
10. mechanical type dust absorption blackboard eraser according to claim 1, is characterized in that: described unilateral bearing is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220713.9A CN103978817B (en) | 2014-05-23 | 2014-05-23 | Mechanical vacuuming blackboard eraser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220713.9A CN103978817B (en) | 2014-05-23 | 2014-05-23 | Mechanical vacuuming blackboard eraser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103978817A true CN103978817A (en) | 2014-08-13 |
| CN103978817B CN103978817B (en) | 2015-07-22 |
Family
ID=51271096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410220713.9A Expired - Fee Related CN103978817B (en) | 2014-05-23 | 2014-05-23 | Mechanical vacuuming blackboard eraser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103978817B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107415547A (en) * | 2017-08-22 | 2017-12-01 | 苏州市智水环境科研技术有限公司 | A kind of environment-friendly dust-proof eraser |
| CN108973443A (en) * | 2018-08-10 | 2018-12-11 | 张家诚 | A kind of cyclic switching formula blackboard convenient for erasing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200184U (en) * | 1986-01-11 | 1986-11-26 | 黄钟和 | Dust-free blackboard eraser |
| CN202782389U (en) * | 2012-09-06 | 2013-03-13 | 雷朝 | Drum type blackboard eraser |
| CN203449817U (en) * | 2013-07-06 | 2014-02-26 | 李泰伟 | Roller brush type dedusting blackboard eraser |
| CN203511087U (en) * | 2013-10-23 | 2014-04-02 | 于坤 | Cleanable blackboard eraser |
| CN203902081U (en) * | 2014-05-23 | 2014-10-29 | 窦大宾 | Mechanical dust-collecting eraser |
-
2014
- 2014-05-23 CN CN201410220713.9A patent/CN103978817B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200184U (en) * | 1986-01-11 | 1986-11-26 | 黄钟和 | Dust-free blackboard eraser |
| CN202782389U (en) * | 2012-09-06 | 2013-03-13 | 雷朝 | Drum type blackboard eraser |
| CN203449817U (en) * | 2013-07-06 | 2014-02-26 | 李泰伟 | Roller brush type dedusting blackboard eraser |
| CN203511087U (en) * | 2013-10-23 | 2014-04-02 | 于坤 | Cleanable blackboard eraser |
| CN203902081U (en) * | 2014-05-23 | 2014-10-29 | 窦大宾 | Mechanical dust-collecting eraser |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107415547A (en) * | 2017-08-22 | 2017-12-01 | 苏州市智水环境科研技术有限公司 | A kind of environment-friendly dust-proof eraser |
| CN108973443A (en) * | 2018-08-10 | 2018-12-11 | 张家诚 | A kind of cyclic switching formula blackboard convenient for erasing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103978817B (en) | 2015-07-22 |
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Granted publication date: 20150722 |