CN109159583A - A kind of environmentally friendly blackboard for teaching with the grey effect of collection - Google Patents

A kind of environmentally friendly blackboard for teaching with the grey effect of collection Download PDF

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Publication number
CN109159583A
CN109159583A CN201811311511.XA CN201811311511A CN109159583A CN 109159583 A CN109159583 A CN 109159583A CN 201811311511 A CN201811311511 A CN 201811311511A CN 109159583 A CN109159583 A CN 109159583A
Authority
CN
China
Prior art keywords
blackboard
basket
main body
under casing
fixedly installed
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
Application number
CN201811311511.XA
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Chinese (zh)
Other versions
CN109159583B (en
Inventor
姹や寒
汤亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weihai Changxiang Haitian New Material Technology Co., Ltd
Original Assignee
Suzhou Zhongyu Zhijun Enterprise Management Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Suzhou Zhongyu Zhijun Enterprise Management Co Ltd filed Critical Suzhou Zhongyu Zhijun Enterprise Management Co Ltd
Priority to CN201811311511.XA priority Critical patent/CN109159583B/en
Publication of CN109159583A publication Critical patent/CN109159583A/en
Application granted granted Critical
Publication of CN109159583B publication Critical patent/CN109159583B/en
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Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04Blackboards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00Blackboard or slate cleaning devices
    • B43L21/02Blackboard or slate cleaning devices with means for absorbing the chalk dust
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00Blackboard or slate cleaning devices
    • B43L21/04Wiper holders

Abstract

The invention discloses a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is related to the blackboard device field of teaching, including blackboard framework main body and under casing, the under casing is fixedly installed on blackboard framework bottom part body, blackboard framework main body front side is provided with panel, the panel two sides are provided with groove, and groove side extends in the inner cavity of blackboard framework main body two sidewalls, blackboard eraser main body is movably set between groove described in two sides, and blackboard eraser main body is connect with panel attachment, ash collection slot is provided in the under casing inner cavity, it is movably set with chalk dust in the ash collection slot and shrinks basket, the chalk dust shrinks basket one end and runs through under casing one side wall, and extend under casing outer wall side, under casing outer wall side is provided with pumping board.The configuration of the present invention is simple, easy to operate, compared with existing traditional blackboard, not only intelligence degree is high, may be implemented to automate, but also can be collected the chalk dust of generation, achievees the effect that environmental protection.

Description

A kind of environmentally friendly blackboard for teaching with the grey effect of collection
Technical field
It is the present invention relates to the blackboard device field of teaching, in particular to a kind of to impart knowledge to students with the environmental protection for collecting grey effect with black Plate.
Background technique
Present teaching writing tool generallys use computer and gives lessons technology, but still there have many professor's habits to continue to use to be traditional Writing style, the mode that side plate book side is given lessons.
But existing traditional blackboard is all but such wiping by manually being wiped using blackboard eraser to blackboard Mode is relatively simple, and is easy to produce a large amount of chalk dust, and the generation of chalk dust can arbitrarily descend slowly and lightly, and be easy to cause environment Pollution, in addition also be easy body harm is caused to student or learner.Therefore, it invents a kind of with the environmental protection religion for collecting grey effect Solved the above problems with blackboard necessary.
Summary of the invention
The purpose of the present invention is to provide a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, to solve above-mentioned background skill The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme: a kind of impart knowledge to students with the environmental protection for collecting grey effect with black Plate, including blackboard framework main body and under casing, the under casing are fixedly installed on blackboard framework bottom part body, the blackboard framework main body Positive side is provided with panel, and the panel two sides are provided with groove, and groove side extends to blackboard framework main body two sides Blackboard eraser main body is movably set in wall inner cavity, between groove described in two sides, and blackboard eraser main body is connect with panel attachment, the under casing It is provided with ash collection slot in inner cavity, chalk dust is movably set in the ash collection slot and shrinks basket, the chalk dust shrinks basket one end and passes through Under casing one side wall is worn, and extends under casing outer wall side, under casing outer wall side is provided with pumping board, and pumping board and chalk dust are received Contracting basket one end is fixedly connected, and pumping board outer wall side is provided with string holes, and the string holes runs through pumping board, and extends to chalk dust receipts In contracting basket, the string holes side is provided with take-up turntable, and take-up turntable and pumping board are in be rotatablely connected, solid on the take-up turntable Surely it is provided with drawstring, the drawstring other end runs through string holes, and extends to chalk dust and shrink in basket inner cavity and shrink basket with chalk dust Inner end wall is fixedly connected.
Preferably, the ash collection slot top is provided with lead-in groove, and under casing roof is run through in the lead-in groove bottom end, and extends to In panel, lead-in groove top side is provided with inclined plate, and the inclined plate is set at the top of under casing, and is located at the panel bottom end It is arranged at the top of side, the inclined plate and under casing in 15 ° of -30 ° of inclinations angle.
Preferably, guide rail is fixedly installed on the groove inner wall, activity is connected with stepper motor in the groove, and walks Connection is engaged with guide rail into motor one end, stepper motor outer wall side is fixedly installed rotary electric machine, the rotary electric machine Output end through-going recess is fixedly connected with blackboard eraser body end.
Preferably, outer link block, the outer link block top are fixedly installed on the blackboard framework body side front Through offering sliding slot, and sliding slot bottom end extends in outer link block, and activity is connected with sliding block, and sliding block front in the sliding slot Side extends to outer link block front side, and the outer link block front side is provided with chalk barrel, and chalk barrel and sliding block are solid Fixed connection.
Preferably, the ash collection slot both ends are fixedly installed bracket, and the cradle top is fixedly installed vibration motor, institute It states vibration motor output end to be set to immediately below lead-in groove, and vibration motor output end is in the movable company of fitting with blackboard eraser bottom part body It connects.
Preferably, the blackboard eraser main body includes connecting plate and static board, and the static board is fixedly installed on connecting plate side, Static board outer wall side is fixedly installed bristle, and bristle is fitted and connected with panel surface activity, and the bristle is by sheep One of hair or consumption ox hair are made.
Preferably, it includes collecting basket and contraction spring that the chalk dust, which shrinks basket, is set as unlimited at the top of the collection basket Formula, and collect basket and be made of cloth, the contraction spring surround to be set to and collect on basket inner wall, and drawstring one end and contraction bullet Spring end is fixedly connected.
Preferably, controller, the controller side are fixedly installed on another side wall in the blackboard framework main body front Movable inlaying has battery, and the stepper motor, rotary electric machine, vibration motor and static board pass through controller and battery electricity Property connection.
Preferably, blackboard framework main body back side upper and lower ends are fixedly installed hook, and link up with L-shaped setting, Pumping board outer wall side top is fixedly installed knob, and knob is set to take-up turntable top.
Technical effect and advantage of the invention:
1, the present invention is advantageously implemented rapid automatized reaching and is wiped to panel by the blackboard eraser main body of activity setting Only, and by the static board with electrostatic, it can achieve and the chalk dust generated in wiping process is adsorbed, avoid powder Pen ash arbitrarily descends slowly and lightly and causes environmental pollution;
2, the present invention shrinks basket by the way that chalk dust is arranged under casing, is conducive to shrink by contraction spring and diastole reaches to powder Pen ash shrinks basket and carries out flexible telescopic effect, carries out pull from ash collection slot to facilitate chalk dust and shrink basket, avoids A large amount of space is occupied when chalk dust contraction basket is too long to be made and clear up chalk dust in chalk dust contraction basket, to facilitate progress Cleaning;
3, the configuration of the present invention is simple, easy to operate, compared with existing traditional blackboard, not only intelligence degree is high, may be implemented Automation, but also the chalk dust of generation can be collected, achieve the effect that environmental protection.
Detailed description of the invention
Fig. 1 is overall structure of the present invention.
Fig. 2 is under casing cut-away section structural schematic diagram of the present invention.
Fig. 3 is enlarged structure schematic diagram at A in Fig. 1 of the present invention.
Fig. 4 is enlarged structure schematic diagram at B in Fig. 1 of the present invention.
Fig. 5 is enlarged structure schematic diagram at C in Fig. 1 of the present invention.
In figure: 1, blackboard framework main body;2, under casing;3, panel;4, groove;5, blackboard eraser main body;51, connecting plate;52, electrostatic Plate;53, bristle;6, ash collection slot;7, chalk dust shrinks basket;71, basket is collected;72, contraction spring;8, pumping board;9, string holes;10, it receives Line turntable;11, drawstring;12, lead-in groove;13, inclined plate;14, guide rail;15, stepper motor;16, rotary electric machine;17, outer link block; 18, sliding slot;19, sliding block;20, chalk barrel;21, bracket;22, vibration motor;23, controller;24, battery;25, it links up with;26, Knob.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of environmentally friendly blackboard for teaching with the grey effect of collection as shown in Figs. 1-5, including blackboard frame Frame body 1 and under casing 2, the under casing 2 are fixedly installed on 1 bottom of blackboard framework main body, the positive side of the blackboard framework main body 1 It is provided with panel 3,3 two sides of panel are provided with groove 4, and 4 side of groove extends in 1 two sidewalls of blackboard framework main body In chamber, blackboard eraser main body 5 is movably set between groove 4 described in two sides, and blackboard eraser main body 5 is fitted and connected with panel 3, the under casing It is provided with ash collection slot 6 in 2 inner cavities, chalk dust is movably set in the ash collection slot 6 and shrinks basket 7, the chalk dust shrinks basket 7 one 2 one side wall of under casing is run through at end, and extends to 2 outer wall side of under casing, and the 2 outer wall side of under casing is provided with pumping board 8, and pumping board 8 7 one end of basket to be shunk with chalk dust to be fixedly connected, the 8 outer wall side of pumping board is provided with string holes 9, and the string holes 9 runs through pumping board 8, And extend to chalk dust and shrink in basket 7,9 side of string holes is provided with take-up turntable 10, and take-up turntable 10 and pumping board 8 are in turn It is dynamic to connect, drawstring 11 is fixedly installed on the take-up turntable 10,11 other end of drawstring runs through string holes 9, and extends to powder Pen ash is shunk in 7 inner cavity of basket to be fixedly connected with chalk dust contraction 7 inner end wall of basket.
Further, in the above scheme, 6 top of ash collection slot is provided with lead-in groove 12,12 bottom end of lead-in groove It through 2 roof of under casing, and extends in panel 3, the 12 top side of lead-in groove is provided with inclined plate 13, and the inclined plate 13 is arranged In 2 top of under casing, and it is located at the 3 bottom end side of panel, the inclined plate 13 is arranged at the top of under casing 2 in 15 ° of -30 ° of inclinations angle, Blackboard eraser main body 5 is avoided when moving up and down, the chalk dust on bristle 53 falls to the external world, to increase to chalk ash collection Efficiency.
Further, in the above scheme, guide rail 14, activity in the groove 4 are fixedly installed on 4 inner wall of groove It is connected with stepper motor 15, and 15 one end of stepper motor engages connection with guide rail 14, the 15 outer wall side of stepper motor is fixed It is provided with rotary electric machine 16, the 16 output end through-going recess 4 of rotary electric machine is fixedly connected with 5 end of blackboard eraser main body, passes through step Into the setting of motor 15, is conducive to drive blackboard eraser main body 5 to move up and down under the operation of stepper motor 15, reaches wiping surface The effect of plate 3, and drive blackboard eraser main body 5 to carry out 90 ° of rotations by the operation of rotary electric machine 16.
Further, in the above scheme, outer link block is fixedly installed on 1 side of the blackboard framework main body front 17, outer 17 top of link block, which is run through, offers sliding slot 18, and 18 bottom end of sliding slot extends in outer link block 17, the sliding slot Activity is connected with sliding block 19 in 18, and the positive side of sliding block 19 extends to the positive side of outer link block 17, the outer link block 17 Positive side is provided with chalk barrel 20, and chalk barrel 20 is fixedly connected with sliding block 19, by the setting of chalk barrel 20, is conducive to pair The storage that chalk is concentrated, and be clamped by the activity of chalk barrel 20 and outer link block 17, it can be convenient to chalk barrel 20 Carry out dust processing.
Further, in the above scheme, 6 both ends of ash collection slot are fixedly installed bracket 21,21 top of bracket It is fixedly installed vibration motor 22,22 output end of vibration motor is set to immediately below lead-in groove 12, and vibration motor 22 is defeated Outlet is fitted and connected with 5 bottom of blackboard eraser main body in activity, is conducive to generate one to blackboard eraser main body 5 under the operation of vibration motor 22 Fixed vibration, so that the chalk dust shake adsorbed in blackboard eraser main body 5 is fallen.
Further, in the above scheme, the blackboard eraser main body 5 includes connecting plate 51 and static board 52, the static board 52 are fixedly installed on 51 side of connecting plate, and the 52 outer wall side of static board is fixedly installed bristle 53, and bristle 53 and panel 3 Surface activity is fitted and connected, and the bristle 53 is made of one of wool or consumption ox hair, is reached by bristle 53 to panel 3 On letter written with chalk wiped, and in wiping process using the electrostatic on static board 52 reach the absorption to chalk dust imitate Fruit reduces chalk dust and arbitrarily floats.
Further, in the above scheme, it includes collecting basket 71 and contraction spring 72 that the chalk dust, which shrinks basket 7, described It collects and is set as open type at the top of basket 71, and collect basket 71 and be made of cloth, the contraction spring 72 surround and is set to collection On 71 inner wall of basket, and 11 one end of drawstring is fixedly connected with 72 end of contraction spring, by collecting 71 inner ring of basket around setting contraction Spring 72 is conducive to achieve the effect that using the elastic potential energy that contraction spring 72 has itself to the compression of collection basket 71 and diastole.
Further, in the above scheme, controller is fixedly installed on the 1 another side wall in front of blackboard framework main body 23, the 23 side movable inlaying of controller has battery 24, the stepper motor 15, rotary electric machine 16,22 and of vibration motor Static board 52 is electrically connected by controller 23 and battery 24, and automation control is advantageously implemented, and reduces manual operation Process, to liberate labour.
Further, in the above scheme, 1 back side upper and lower ends of blackboard framework main body are fixedly installed hook 25, and link up with 25 L-shaped settings, be conducive to it is by hook 25 that blackboard framework main body 1 is fixed on the wall, on plank or desk On, the 8 outer wall side top of pumping board is fixedly installed knob 26, and knob 26 is set to 10 top of take-up turntable.
This practical working principle:
When work, start each part in the present apparatus using controller 23 and bring into operation, first by static board 52 and battery 24 it Between power supply connected so that static board 52 generate electrostatic, and control stepper motor 15 guide rail 14 carry out up and down Movement, is reached using the bristle 53 in blackboard eraser main body 5 and is wiped to the letter written with chalk on panel 3, while being produced using static board 52 Raw electrostatic reaches the chalk dust generated to wiping and adsorbs, and avoids chalk dust and arbitrarily descends slowly and lightly;
After 3 wiped clean of panel, stepper motor 15 is moved on to 4 bottom end of groove, and then rotary electric machine 16 runs and drives blackboard eraser Main body 5 carries out 90 ° of rotation, so that then bristle 53 disconnects battery 24 and electrostatic by controller 23 towards in lead-in groove 12 The electric connection of plate 52 and lose electrostatic, then being fitted and connected so that blackboard eraser by vibration motor 22 and 5 bottom of blackboard eraser main body Main body 5 shakes the chalk dust adhered in blackboard eraser main body 5 into ash collection slot 6 with the vibration that vibration motor 22 runs and generates Chalk dust, which is shunk in basket 7, to be collected;
After the chalk dust vibration in blackboard eraser main body 5 is clean, manual rotation's take-up turntable 10 achievees the effect that wind drawstring 11, and Basket 7 can be shunk to chalk dust while drawstring 11 is shunk to compress, chalk dust is then shunk by basket 7 by pull pumping board 8 It pulls out, and the chalk dust being collected into basket 7 is shunk to chalk dust and is cleared up, after chalk dust cleaning, chalk dust is shunk Basket 7 is reinserted into ash collection slot 6, and unclamps take-up turntable 10 and chalk dust contraction basket 7 is made to utilize contraction spring 72 itself Elastic potential energy again diastole chalk dust shrink basket 7 effect, achieve the effect that regather chalk dust with this.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features, All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (9)

1. a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, including blackboard framework main body (1) and under casing (2), feature exists In: the under casing (2) is fixedly installed on blackboard framework main body (1) bottom, and the positive side of the blackboard framework main body (1) is provided with Panel (3), panel (3) two sides are provided with groove (4), and groove (4) side extends to blackboard framework main body (1) two sides It in wall inner cavity, is movably set between groove described in two sides (4) blackboard eraser main body (5), and blackboard eraser main body (5) is bonded with panel (3) It connects, is provided with ash collection slot (6) under casing (2) inner cavity, chalk dust is movably set in the ash collection slot (6) and shrinks basket (7), the chalk dust shrinks basket (7) one end through under casing (2) one side wall, and extends under casing (2) outer wall side, the under casing (2) outer wall side is provided with pumping board (8), and pumping board (8) shrinks basket (7) one end with chalk dust and is fixedly connected, and the pumping board (8) is outside Wall side is provided with string holes (9), and the string holes (9) runs through pumping board (8), and is extended to chalk dust and shunk in basket (7), the string holes (9) side is provided with take-up turntable (10), and take-up turntable (10) and pumping board (8) are in rotation connection, the take-up turntable (10) On be fixedly installed drawstring (11), drawstring (11) other end run through string holes (9), and extend to chalk dust shrink basket (7) in Basket (7) inner end wall is shunk with chalk dust in chamber to be fixedly connected.
2. according to claim 1 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the collection ash Slot (6) top is provided with lead-in groove (12), and under casing (2) roof is run through in lead-in groove (12) bottom end, and extends to panel (3) Interior, lead-in groove (12) the top side is provided with inclined plate (13), and the inclined plate (13) is set at the top of under casing (2), and is located at Panel (3) the bottom end side, the inclined plate (13) and under casing (2) top are arranged in 15 ° of -30 ° of inclinations angle.
3. according to claim 2 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the groove (4) it is fixedly installed on inner wall guide rail (14), the interior activity of the groove (4) is connected with stepper motor (15), and stepper motor (15) one end engages connection with guide rail (14), and stepper motor (15) the outer wall side is fixedly installed rotary electric machine (16), institute Rotary electric machine (16) output end through-going recess (4) is stated to be fixedly connected with blackboard eraser main body (5) end.
4. according to claim 3 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the blackboard Chassis body (1) side is fixedly installed outer link block (17) on front, and outer link block (17) top, which is run through, offers cunning Slot (18), and sliding slot (18) bottom end extends in outer link block (17), the interior activity of the sliding slot (18) is connected with sliding block (19), and Sliding block (19) front side extends to the positive side of outer link block (17), and the positive side of outer link block (17) is provided with chalk Cylinder (20), and chalk barrel (20) is fixedly connected with sliding block (19).
5. according to claim 4 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the collection ash Slot (6) both ends are fixedly installed bracket (21), are fixedly installed vibration motor (22) at the top of the bracket (21), the vibration electricity Machine (22) output end is set to immediately below lead-in groove (12), and vibration motor (22) output end and blackboard eraser main body (5) bottom are in work It is dynamic to be fitted and connected.
6. according to claim 5 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the blackboard eraser Main body (5) includes connecting plate (51) and static board (52), and the static board (52) is fixedly installed on connecting plate (51) side, described Static board (52) outer wall side is fixedly installed bristle (53), and bristle (53) is fitted and connected with panel (3) surface activity, described Bristle (53) is made of one of wool or consumption ox hair.
7. according to claim 6 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the chalk It includes collecting basket (71) and contraction spring (72) that ash, which shrinks basket (7), open type is set as at the top of the collection basket (71), and collect Basket (71) is made of cloth, and the contraction spring (72) surround to be set to and collect on basket (71) inner wall, and drawstring (11) one end It is fixedly connected with contraction spring (72) end.
8. according to claim 7 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the blackboard It is fixedly installed controller (23) on another side wall in chassis body (1) front, controller (23) side movable inlaying has storage Battery (24), the stepper motor (15), rotary electric machine (16), vibration motor (22) and static board (52) pass through controller (23) it is electrically connected with battery (24).
9. according to claim 8 a kind of with the environmentally friendly blackboard for teaching for collecting grey effect, it is characterised in that: the blackboard Chassis body (1) back side upper and lower ends are fixedly installed hook (25), and link up with (25) L-shaped setting, and the pumping board (8) is outside Wall side top is fixedly installed knob (26), and knob (26) is set to take-up turntable (10) top.
CN201811311511.XA 2018-11-06 2018-11-06 Blackboard is used in environmental protection teaching with grey effect of collection Active CN109159583B (en)

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CN109159583B CN109159583B (en) 2020-06-23

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN110626096A (en) * 2019-09-26 2019-12-31 重庆市开州区桑梦科技有限公司 Display board for English teaching
CN111845169A (en) * 2020-08-05 2020-10-30 陕西理工大学 Auxiliary device for mathematical education
CN112192978A (en) * 2020-10-28 2021-01-08 张亚斌 Blackboard eraser capable of being overturned for quick and repeated use
CN113524970A (en) * 2021-07-13 2021-10-22 泰顺县兴隆木制玩具有限公司 Wooden drawing board of environmental protection no dust

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CN206252040U (en) * 2016-11-29 2017-06-16 燕山大学 A kind of telescopic book searching board holder
CN206664101U (en) * 2016-08-01 2017-11-24 黄河科技学院 The anti-flying dust formula blackboard device of automatic erasing
CN108230780A (en) * 2018-03-05 2018-06-29 四川乐为科技有限公司 A kind of multi-functional picture educational facilities
CN108301469A (en) * 2018-03-05 2018-07-20 李婧娴 A kind of bathroom hair in pipeline cleaner
CN208035751U (en) * 2017-05-16 2018-11-02 长沙医学院 A kind of packaged type science of economic management demonstration board

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JPS6172462A (en) * 1984-09-18 1986-04-14 Matsushita Electric Ind Co Ltd Black board with copying function
CN2042480U (en) * 1988-12-30 1989-08-09 白明杰 Spring type cleaning device for removing of obstructions in waste pipes
CN101845843A (en) * 2010-06-05 2010-09-29 张光裕 Impact type drain cleaner
CN201922798U (en) * 2010-12-08 2011-08-10 上海市黄浦区新凌小学 Bag for holding chalk dust
CN106004184A (en) * 2016-06-29 2016-10-12 裴萌 Environment-friendly blackboard preventing dust pollution
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CN206252040U (en) * 2016-11-29 2017-06-16 燕山大学 A kind of telescopic book searching board holder
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Publication number Priority date Publication date Assignee Title
CN110626096A (en) * 2019-09-26 2019-12-31 重庆市开州区桑梦科技有限公司 Display board for English teaching
CN111845169A (en) * 2020-08-05 2020-10-30 陕西理工大学 Auxiliary device for mathematical education
CN112192978A (en) * 2020-10-28 2021-01-08 张亚斌 Blackboard eraser capable of being overturned for quick and repeated use
CN113524970A (en) * 2021-07-13 2021-10-22 泰顺县兴隆木制玩具有限公司 Wooden drawing board of environmental protection no dust
CN113524970B (en) * 2021-07-13 2022-01-04 泰顺县兴隆木制玩具有限公司 Wooden drawing board of environmental protection no dust

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