CN106313963A - Automatic cleaning spliced blackboard with double using faces - Google Patents

Automatic cleaning spliced blackboard with double using faces Download PDF

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Publication number
CN106313963A
CN106313963A CN201610846002.1A CN201610846002A CN106313963A CN 106313963 A CN106313963 A CN 106313963A CN 201610846002 A CN201610846002 A CN 201610846002A CN 106313963 A CN106313963 A CN 106313963A
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CN
China
Prior art keywords
lath
cleaning
blackboard
long
room
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
Application number
CN201610846002.1A
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Chinese (zh)
Inventor
鞠虹
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.)
Hangzhou Fuyang Shangke Technology Co Ltd
Original Assignee
Hangzhou Fuyang Shangke Technology 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.)
Filing date
Publication date
Application filed by Hangzhou Fuyang Shangke Technology Co Ltd filed Critical Hangzhou Fuyang Shangke Technology Co Ltd
Priority to CN201610846002.1A priority Critical patent/CN106313963A/en
Publication of CN106313963A publication Critical patent/CN106313963A/en
Pending legal-status Critical Current

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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

Abstract

The invention belongs to the field of teaching articles, and relates to an automatic cleaning spliced blackboard with double using faces. The automatic cleaning spliced blackboard comprises a body board face, a drive device and an outer frame. The body board face comprises a plurality of battens. Each batten comprises using faces, wherein the using faces are arranged on the front face and the back face of the batten. The outer frame comprises an operation chamber and a scribbling and wiping chamber, a board face installing window is formed in one face of the scribbling and wiping chamber, the body board face is fixedly arranged on the board face installing window, and cleaning sprayers are further arranged in the scribbling and wiping chamber and face the top of the board face installing window. Compared with the prior art, the automatic cleaning spliced blackboard has the beneficial effects that manual blackboard scribbling and wiping can be replaced, and the automatic blackboard cleaning action is finished; the device is simple and can be obtained through refitting on an existing blackboard; and cleaning and using can be conducted at the same time, and normal usage of users is not affected.

Description

A kind of cleaning automatically assembled blackboard in pair of use face
Technical field
The invention belongs to realia field, relate to a kind of blackboard, be related specifically to the automatic cleaning in a kind of pair of use face Assembled blackboard.
Background technology
Blackboard is the realia of a kind of classics, and teacher can write in the above and learn for student viewing.At present in school The Painting and writing tool that the blackboard of 90 percent uses is chalk, and remaining major part uses free ink pen.For chalk, teacher is being coated with When erasing the board, easily cause dust, and for it is frequently necessary to be in the teacher of this dust operated within range, can make healthy Become the biggest impact.For some dust-free chalks or free ink pen, even without the problem of dust, but it is more also to take teacher Time goes to clear up monoblock blackboard, and particularly in university, usual blackboard is upper and lower two pieces and is used alternatingly, and embrocates workload bigger.
Therefore, it is necessary to provide the technical scheme improved, to solve technical problem present in prior art.
Summary of the invention
It is an object of the invention to, it is provided that a kind of assembled blackboard that can clean simultaneously and use, there is simple in construction, make Use convenient advantage.
In order to achieve the above object, the invention provides a kind of pair of use face cleans assembled blackboard automatically, including:
Main board face, including a plurality of lath, parallel between described each lath, seamless touch between adjacent described parallel strip Touch;Wherein said lath includes use face, and the tow sides of lath are provided with described use face;
Driving means, including drive link, driving handle and the connecting rod equal with described lath quantity;Described connecting rod Including driving gear and connecting the swingle of described driving gear and corresponding lath;Described each driving gear all with described drive link Occlusion, described driving handle is connected with drive link;
Outer frame body, including operating room with embrocate room, described driving handle, drive link and drive gear to be arranged at described behaviour Make indoor;The described room of embrocating one side offers plate face and installs window, and described main board face is fixedly mounted on described plate face and installs window On mouth, be positioned at described in embrocate chamber interior and be additionally provided with cleaning shower nozzle, described cleaning shower nozzle installs window top towards plate face.
During use, user can carry out picture on the use face towards outside and write action, when needs are embrocated, and Ke Yizhuan Dynamic driving handle, driving handle drives drive link, and due to drive link and each driving engaged gears, the motion of drive link will drive Drive pinion rotation, drive gear thus drive and rotate with himself fixing swingle, and swingle and lath fix, this Time the upset entrance of this use face embrocate chamber interior, and be originally positioned at and embrocate the use face of chamber interior and produce, user enters the most altogether Action write by row picture.
When the use face needing cleaning rotates into and embrocates chamber interior, open and clean shower nozzle, clean shower nozzle by clean water Body is sprayed at lath and uses top, face, and prolongation in time, clean water body to flow through each lath from top to bottom, thus reaches to clean The purpose in use face, whole main board face.
Preferably, the shape size of described each lath is the most identical.It is further preferable that the quantity of described lath is 10, wide Degree is 20 centimetres.Same it is further preferable that the quantity of described lath is 20, width is 10 centimetres.The whole height of blackboard is 2 Rice is more suitable, the wide or flat discomfort the most easily affecting user and beholder of mistake.
Preferably, one end of described lath is installed with described swingle, and the other end is installed with location abutment extending, position Window edge is installed in described plate face and is provided with the fixed card slot for described location abutment extending overlap joint.Such scheme is in order to ensure plate Bar life-time service will not rotate the situation of axle offset.The two ends being positioned at lath are provided with hard point, one end therein by Swingle load, the other end is coordinated load from positioning abutment extending with fixed card slot.During installation, location abutment extending is goed deep into inside fixed card slot To obtain location, owing to fixed card slot will not apply grip force to location abutment extending, the most do not affect lath normally rotates use.
Preferably, described swingle length is longer than lath, and described lath is fixed on the middle part of swingle, is positioned at described plate face Window edge is installed and is provided with the fixed card slot overlapped for described swingle.The design concept of this programme is to include two for lath Hold at interior overall offer hard point.Lath is longer, and generally between 2~5 meters, therefore unilateral fixing easily causes lath to rotate Axle offset or bend, make lath be integrally attached on swingle to make each point stress equal, and middle part will not be occurred to cave in Phenomenon.
Preferably, the quantity of described cleaning shower nozzle is 2~10, may be contained within described in embrocate ceiling portion.Due to main board Face is longer, and less cleaning shower nozzle is difficult to clean comprehensively.Cleaning shower nozzle is installed on and embrocates ceiling portion simultaneously, can be the most logical Cross gravity and increase water body pressure.
Preferably, described lath includes long front, long reverse side, the first long side surface and the second long side surface, and described use face is divided It is not arranged on described long front and long reverse side, is positioned on described first long side surface and the second long side surface and is provided with elastic packing Bar.When being positioned at the use face embrocating chamber interior and cleaning, water body easily gap leakage between lath and lath, on using When stating scheme, it is ensured that the normal use in outside use face, make inside and outside be relatively isolated, be independent of each other.
Compared with prior art, the beneficial effects of the present invention is:
Can replace manually being coated with and erase the board, complete the automatic cleaning action of blackboard;Device is simple, can be entered by existing blackboard Row repacking obtains;Clean and use and can carry out simultaneously, do not affect the normal use of user.
Accompanying drawing explanation
Fig. 1 is the perspective view automatically cleaning assembled blackboard in double use faces of the present invention;
Fig. 2 is the Facad structure schematic diagram automatically cleaning assembled blackboard in double use face;
Fig. 3 is the left side structural representation automatically cleaning assembled blackboard in double use face.
Fig. 4 is the perspective view equipped with the lath driving gear and swingle.
Fig. 5 is the Facad structure schematic diagram equipped with the lath driving gear and swingle.
Wherein: 1, lath;2, drive link;3, driving handle;4, gear is driven;5, swingle;6, operating room;7, embrocate Room;8, window is installed in plate face;9, shower nozzle is cleaned;10, location abutment extending;11, fixed card slot;12, face is used;13, elastic sealing strip; 14, long front;15, long reverse side;16, the first long side surface;17, the second long side surface.
Detailed description of the invention
In order to be better understood from the present invention, enumerate following several specific embodiment and for analysis and understand, but It should be appreciated that the invention is not limited in this, a series of deformation made according to the embodiment provided are replaced with equivalence and also should be managed Solve as to be included within the spirit of the invention.
Embodiment 1
Reference Fig. 1, Fig. 2 and Fig. 3, the crosscutting formula assembly blackboard of the teaching that the present embodiment provides, including: main board face, Driving means and outer frame body.Wherein main board face, including a plurality of lath 1, parallel between each lath 1, adjacent parallel strip 1 it Between seamless touch, the Length x Width of lath 1 is the most equal, can regard all of lath 1 as and be assembled into one, and lath 1 is unified for long Spending 4 meters, width 10 centimetres, total number is 20, and face is seamless touches for wide face and width for assembled mode, and two ends are the most right Together, rectangle structure being integrally formed, wherein said lath includes use face 12, and the tow sides of lath are provided with described use Face 12.
Driving means, including drive link 2, driving handle 3 and and connecting rod, the quantity of connecting rod is 20, with lath 1 One_to_one corresponding, connecting rod includes driving gear 4 and connecting the swingle 5 driving gear 4 with corresponding lath 1, respectively drives gear 4 equal Being engaged with drive link 2, driving handle 3 is connected with drive link 2.When user motion driving handle 3, driving handle 3 drives Drive link 2 moves, and drive link 2 is engaged with each driving gear 4, bar 5 is rotated in the lump when driving gear 4 and then to rotate and revolves Turn, simultaneously because swingle 5 meeting stile 1, the most final effect is the rotation of lath 1, complete lath 1 use face towards Conversion.
Outer frame body, including operating room 6 with embrocate room 7, driving handle 3, drive link 2 and drive gear 4 to be arranged at operation In room 6;Embrocating room 7 one side and offer plate face installation window 8, main board face is fixedly mounted on plate face and installs on window 8, is positioned at painting Wiping the internal cleaning shower nozzle 9 that is additionally provided with in room 7, cleaning shower nozzle 9 installs window 8 top towards plate face;Operating room 6 needs with embrocating room 7 It is relatively isolated, embrocates the cleaning shower nozzle of room 7 operationally can spray water body because being positioned at, if water body enters in operating room 6, Easily cause other equipment malfunctions.The quantity cleaning shower nozzle 9 is 2, is separately positioned on plate face and installs the both sides at window 8 top, When operating, entirety is rinsed by water body from two jiaos, the top in main board face.
Embodiment 2
With reference to Fig. 1, Fig. 2 and Fig. 3, the crosscutting formula assembly blackboard of the teaching that the present embodiment provides and the religion in embodiment 1 The crosscutting formula assembly blackboard learned is slightly different, including: main board face, driving means and outer frame body.Wherein main board face, including A plurality of lath 1, parallel between each lath 1, seamless between adjacent parallel strip 1 touch, the Length x Width of lath 1 is the most equal, Can regard all of lath 1 as and be assembled into one, lath 1 is unified is length 5 meters, width 20 centimetres, and total number is 10, spells Face is seamless touches for wide face and width for the mode of dress, and aliging along a straight line in two ends, rectangle structure, wherein said lath are integrally formed Including use face 12, the tow sides of lath are provided with described use face 12.
Driving means, including drive link 2, driving handle 3 and and connecting rod, the quantity of connecting rod is 10, with lath 1 One_to_one corresponding, connecting rod includes driving gear 4 and connecting the swingle 5 driving gear 4 with corresponding lath 1, respectively drives gear 4 equal Being engaged with drive link 2, driving handle 3 is connected with drive link 2.When user motion driving handle 3, driving handle 3 drives Drive link 2 moves, and drive link 2 is engaged with each driving gear 4, bar 5 is rotated in the lump when driving gear 4 and then to rotate and revolves Turn, simultaneously because swingle 5 meeting stile 1, the most final effect is the rotation of lath 1, complete lath 1 use face towards Conversion.
Outer frame body, including operating room 6 with embrocate room 7, driving handle 3, drive link 2 and drive gear 4 to be arranged at operation In room 6;Embrocating room 7 one side and offer plate face installation window 8, main board face is fixedly mounted on plate face and installs on window 8, is positioned at painting Wiping the internal cleaning shower nozzle 9 that is additionally provided with in room 7, cleaning shower nozzle 9 installs window 8 top towards plate face;Operating room 6 needs with embrocating room 7 It is relatively isolated, embrocates the cleaning shower nozzle of room 7 operationally can spray water body because being positioned at, if water body enters in operating room 6, Easily cause other equipment malfunctions.The quantity cleaning shower nozzle 9 is 10, is arranged on plate face according to the width of lath 1 is equally spaced Window 8 top is installed.
Embodiment 3
With reference to Fig. 1, Fig. 2 and Fig. 3, the crosscutting formula assembly blackboard of teaching in the present embodiment, the mainly phase to lath 1 Close structure to be improved, during to solve life-time service, the problem that lath 1 is susceptible to deformation.Concrete, the crosscutting formula of teaching Assembled blackboard includes: main board face, driving means and outer frame body.Wherein main board face, including a plurality of lath 1, between each lath 1 Parallel, seamless between adjacent parallel strip 1 touch, the Length x Width of lath 1 is the most equal, can regard all of lath 1 as and spell Dressing up one, lath 1 is unified is length 4 meters, width 10 centimetres, and total number is 20, and assembled mode is wide face and wide face Seamless touching, aliging along a straight line in two ends, rectangle structure is integrally formed, and wherein said lath includes use face 12, lath Tow sides are provided with described use face 12.
Driving means, including drive link 2, driving handle 3 and and connecting rod, the quantity of connecting rod is 20, with lath 1 One_to_one corresponding, connecting rod includes driving gear 4 and connecting the swingle 5 driving gear 4 with corresponding lath 1, respectively drives gear 4 equal Being engaged with drive link 2, driving handle 3 is connected with drive link 2.
Outer frame body, including operating room 6 with embrocate room 7, driving handle 3, drive link 2 and drive gear 4 to be arranged at operation In room 6;Embrocating room 7 one side and offer plate face installation window 8, main board face is fixedly mounted on plate face and installs on window 8, is positioned at painting Wiping the internal cleaning shower nozzle 9 that is additionally provided with in room 7, cleaning shower nozzle 9 installs window 8 top towards plate face.
One end of lath 1 is installed with swingle 5, and the other end is installed with location abutment extending 10, is positioned at plate face and installs Window 8 edge is provided with the fixed card slot 11 for positioning abutment extending 10 overlap joint.
Embodiment 4
With reference to Fig. 1, Fig. 2 and Fig. 3, the present embodiment and embodiment 3 based on as design concept, also to lath 1 Dependency structure is improved, during to solve life-time service, and the problem that lath 1 is susceptible to deformation.Concrete, that imparts knowledge to students is crosscutting Formula assembly blackboard includes: main board face, driving means and outer frame body.Wherein main board face, including a plurality of lath 1, each lath 1 it Between parallel, seamless between adjacent parallel strip 1 touch, the Length x Width of lath 1 is the most equal, can regard all of lath 1 as Being assembled into one, lath 1 is unified is length 5 meters, width 20 centimetres, and total number is 10, and assembled mode is that wide face is with wide Face is seamless to be touched, and aligns along a straight line in two ends, and rectangle structure is integrally formed, and wherein said lath includes use face 12, lath Tow sides be provided with described use face 12.
Driving means, including drive link 2, driving handle 3 and and connecting rod, the quantity of connecting rod is 10, with lath 1 One_to_one corresponding, connecting rod includes driving gear 4 and connecting the swingle 5 driving gear 4 with corresponding lath 1, respectively drives gear 4 equal Being engaged with drive link 2, driving handle 3 is connected with drive link 2.
Outer frame body, including operating room 6 with embrocate room 7, driving handle 3, drive link 2 and drive gear 4 to be arranged at operation In room 6;Embrocating room 7 one side and offer plate face installation window 8, main board face is fixedly mounted on plate face and installs on window 8, is positioned at painting Wiping the internal cleaning shower nozzle 9 that is additionally provided with in room 7, cleaning shower nozzle 9 installs window 8 top towards plate face.
Swingle 5 length is longer than lath 1, and lath 1 is fixed on the middle part of swingle 5, is positioned at installation window 8 edge, plate face and sets It is equipped with the fixed card slot 11 for swingle 5 overlap joint.
Embodiment 5
With reference to Fig. 4, the present embodiment is roughly the same with embodiment 1, and difference is the improvement to lath 1.Lath 1 is in strip Template, including long front 14, anyway face the 15, first long side surface 16 and the second long side surface 17, the longest front 14 and anyway face 15 On be provided with use face 12, the first long side surface 16 and the second long side surface 17 are pasted with elastic sealing strip 13.

Claims (8)

1. the assembled blackboard of cleaning automatically in double use faces, it is characterised in that including:
Main board face, including a plurality of lath (1), parallel between described each lath (1), between adjacent described parallel strip (1) Seamless touch;Wherein said lath includes use face (12), and the tow sides of lath are provided with described use face (12);
Driving means, including drive link (2), driving handle (3) and the connecting rod equal with described lath (1) quantity;Described Connecting rod includes driving gear (4) and connecting the swingle (5) of described driving gear (4) and corresponding lath (1);Described each driving Gear (4) is all engaged with described drive link (2), and described driving handle (3) is connected with drive link (2);
Outer frame body, including operating room (6) with embrocate room (7), described driving handle (3), drive link (2) and drive gear (4) It is arranged in described operating room (6);Described room (7) one side of embrocating offers plate face installation window (8), and described main board face is fixed Be arranged on described plate face to install on window (8), be positioned at described in embrocate that room (7) is internal is additionally provided with cleaning shower nozzle (9), described cleaning Shower nozzle (9) installs window (8) top towards plate face.
Automatically the assembled blackboard of cleaning in the most according to claim 1 pair of use face, it is characterised in that described each lath (1) Shape size the most identical.
Automatically the assembled blackboard of cleaning in the most according to claim 2 pair of use face, it is characterised in that described lath (1) Quantity is 10, and width is 20 centimetres.
Automatically the assembled blackboard of cleaning in the most according to claim 2 pair of use face, it is characterised in that described lath (1) Quantity is 20, and width is 10 centimetres.
Automatically the assembled blackboard of cleaning in the most according to claim 1 pair of use face, it is characterised in that described lath (1) One end is installed with described swingle (5), and the other end is installed with location abutment extending (10), is positioned at described plate face and installs window (8) edge is provided with the fixed card slot (11) overlapped for described location abutment extending (10).
Automatically the assembled blackboard of cleaning in the most according to claim 1 pair of use face, it is characterised in that described swingle (5) Length is longer than lath (1), and described lath (1) is fixed on the middle part of swingle (5), is positioned at described plate face and installs window (8) edge It is provided with the fixed card slot (11) overlapped for described swingle (5).
Automatically the assembled blackboard of cleaning in the most according to claim 1 pair of use face, it is characterised in that described cleaning shower nozzle (9) quantity is 2~10, may be contained within described in embrocate room (7) top.
Automatically the assembled blackboard of cleaning in the most according to claim 1 pair of use face, it is characterised in that described lath includes long Front (14), long reverse side (15), the first long side surface (16) and the second long side surface (17), described use face (12) are separately positioned on institute State on long front (14) and long reverse side (15), be positioned on described first long side surface (16) and the second long side surface (17) and be provided with elasticity Sealing strip (13).
CN201610846002.1A 2016-09-23 2016-09-23 Automatic cleaning spliced blackboard with double using faces Pending CN106313963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610846002.1A CN106313963A (en) 2016-09-23 2016-09-23 Automatic cleaning spliced blackboard with double using faces

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Application Number Priority Date Filing Date Title
CN201610846002.1A CN106313963A (en) 2016-09-23 2016-09-23 Automatic cleaning spliced blackboard with double using faces

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CN106313963A true CN106313963A (en) 2017-01-11

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CN2069801U (en) * 1989-04-06 1991-01-23 马安民 Multi-picture painted screen
CN2116591U (en) * 1991-11-18 1992-09-23 唐卫东 Two-face combined blackboard with box
CN2341807Y (en) * 1998-10-06 1999-10-06 黄会球 Three dimension stereo blackboard
CN1966282A (en) * 2006-11-24 2007-05-23 陕西科技大学 Turn-over type blackboard
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CN202088736U (en) * 2011-06-14 2011-12-28 陈沈坚 Special blackboard for handwriting exercise
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JP2013087575A (en) * 2011-10-21 2013-05-13 Comany Inc Partition device functions as writing board
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CN203681077U (en) * 2014-01-22 2014-07-02 於辉 Blackboard with washing and air drying and sewage circulating filtration functions
CN203752737U (en) * 2013-12-29 2014-08-06 刘艳丰 Circular alternating wiping-free dustless blackboard
CN204309459U (en) * 2014-11-24 2015-05-06 邱军钦 Dust-proof from wiping turnover blackboard
CN104742603A (en) * 2015-03-23 2015-07-01 常州大学 Three-turning-face multifunctional blackboard
CN204432128U (en) * 2015-02-06 2015-07-01 南通跃通数控设备有限公司 A kind of splicing blackboard
CN204567022U (en) * 2015-04-02 2015-08-19 王月奇 A kind of band is from the blackboard wiping function and dust-collecting box
CN204605298U (en) * 2015-04-29 2015-09-02 天津崇领科技有限公司 The two-sided use blackboard of dust-collecting type is wiped in a kind of
CN204622949U (en) * 2015-05-07 2015-09-09 刘银 Dust absorption blackboard eraser
CN204687636U (en) * 2015-04-20 2015-10-07 冯奕嘉 A kind of blackboard of rotatable flexible formula
CN105479991A (en) * 2014-09-19 2016-04-13 三峡大学 Rotary self-wiping dustproof blackboard

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2069801U (en) * 1989-04-06 1991-01-23 马安民 Multi-picture painted screen
CN2116591U (en) * 1991-11-18 1992-09-23 唐卫东 Two-face combined blackboard with box
CN2341807Y (en) * 1998-10-06 1999-10-06 黄会球 Three dimension stereo blackboard
CN1966282A (en) * 2006-11-24 2007-05-23 陕西科技大学 Turn-over type blackboard
CN201432512Y (en) * 2009-06-02 2010-03-31 冯雯 Blackboard easy to clean
KR100949467B1 (en) * 2009-07-23 2010-03-24 이상첨 Multipurpose board
CN202088736U (en) * 2011-06-14 2011-12-28 陈沈坚 Special blackboard for handwriting exercise
CN202180672U (en) * 2011-07-02 2012-04-04 张艺 Three-surface writing board
JP2013087575A (en) * 2011-10-21 2013-05-13 Comany Inc Partition device functions as writing board
CN102896948A (en) * 2012-11-16 2013-01-30 于文超 Automatic cleaning type blackboard
CN202986510U (en) * 2012-12-20 2013-06-12 孙蕙心 Blackboard
CN203358130U (en) * 2013-07-25 2013-12-25 华北电力大学(保定) Self-erasing type three-side blackboard
CN203752737U (en) * 2013-12-29 2014-08-06 刘艳丰 Circular alternating wiping-free dustless blackboard
CN203681077U (en) * 2014-01-22 2014-07-02 於辉 Blackboard with washing and air drying and sewage circulating filtration functions
CN105479991A (en) * 2014-09-19 2016-04-13 三峡大学 Rotary self-wiping dustproof blackboard
CN204309459U (en) * 2014-11-24 2015-05-06 邱军钦 Dust-proof from wiping turnover blackboard
CN204432128U (en) * 2015-02-06 2015-07-01 南通跃通数控设备有限公司 A kind of splicing blackboard
CN104742603A (en) * 2015-03-23 2015-07-01 常州大学 Three-turning-face multifunctional blackboard
CN204567022U (en) * 2015-04-02 2015-08-19 王月奇 A kind of band is from the blackboard wiping function and dust-collecting box
CN204687636U (en) * 2015-04-20 2015-10-07 冯奕嘉 A kind of blackboard of rotatable flexible formula
CN204605298U (en) * 2015-04-29 2015-09-02 天津崇领科技有限公司 The two-sided use blackboard of dust-collecting type is wiped in a kind of
CN204622949U (en) * 2015-05-07 2015-09-09 刘银 Dust absorption blackboard eraser

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Application publication date: 20170111