CN108297578A - A kind of reflection prevention blackboard of height-adjustable type - Google Patents
A kind of reflection prevention blackboard of height-adjustable type Download PDFInfo
- Publication number
- CN108297578A CN108297578A CN201711464630.4A CN201711464630A CN108297578A CN 108297578 A CN108297578 A CN 108297578A CN 201711464630 A CN201711464630 A CN 201711464630A CN 108297578 A CN108297578 A CN 108297578A
- Authority
- CN
- China
- Prior art keywords
- blackboard
- height
- fixed
- reflection prevention
- draw runner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
Landscapes
- Drawing Aids And Blackboards (AREA)
Abstract
The invention discloses a kind of reflection prevention blackboards of height-adjustable type,Including fixed after-frame,The surface of fixed after-frame is provided with four sections of sliding rails,Sliding rail surface is provided with vertical chute,It is provided with height adjustable blackboard structure on the sliding rail of two sections of inside,The both sides of height adjustable blackboard structure are respectively connected with reflection prevention blackboard structure,It is provided with environmental protection in height adjustable blackboard structure and inhales grey structure,Height adjustable blackboard structure includes main blackboard,Main blackboard rear surface both sides are respectively connected with vertical draw runner,Vertical draw runner is stuck on corresponding vertical chute,Fixed after-frame bottom surface is equipped with linear motor,Linear motor is connected with drive rod,The top of drive rod is fixedly connected with main blackboard,The device can freely adjust the height of blackboard,So that writing and the displaying of plate face content are more convenient on blackboard,Blackboard can be avoided reflective phenomenon occur simultaneously,Additionally it is avoided that flying upward for chalk dust,Be conducive to environmental protection and protection teacher,The health of student.
Description
Technical field
The present invention relates to blackboard field, specially a kind of reflection prevention blackboard of height-adjustable type.
Background technology
Blackboard is not the plate face for refering in particular to black, says that it is a plane that can use chalk repeated writing in traditional sense,
Plate face is hard, is chiefly used in imparting knowledge to students.Blackboard is generally used made of plank or ground glass etc., can specifically write material with chalk etc.
Material writes above, and blackboard is mostly black, blackish green, white or ecru.
Green plate plate face is blackish green, with chalk-writing, does not stimulate the eyes of people, is conducive to the protection of eyesight；Blank plate face
For white, it is mostly used various aqueous crayons and writes；For color coated steel sheet plate face using the high duty alloy steel plate for being coated with wear-resistant coating, plate face is thick
Degree is mostly 0.3mm-0.4mm, wear-resisting, is not fallen off, colour-fast, durable, writes good hand touch, and clear writing is easily write, and is easily wiped
Examination, dust are few；New material composite plate is by polymer inlet alloying pellet and epoxy resin through disposal pressed moulding surface
Without any processing, board thickness 3mm, fluent writing, clear writing is permanently non-slip, non-reflective, and noresidue after wiping can
Depending on excellent, for service life up to 15 years or more, surface plate plate face flat smooth, cambered plate plate face was curved surface, is prevented after tested
It is reflective, it can make the student for being sitting in each corner that can also see writing on the blackboard writing clearly, be suitable for larger classroom.
Magnet board is lined with magnetic stripe bar magnet inside blackboard, or magnetic can be used to follow closely in surface attachment magnetic-particle, use, magnetic
The fixed small-sized educational aid such as block or picture facilitate displaying；Multifunctional combined board, interactive electric whiteboard, band curtain projection plate, five
Line score music blackboard, is the combination of traditional blackboard and modern science and technology, traditional blackboard, is equipped with electronic whiteboard, projector,
Computer, and corresponding teaching software, hardware perfectly supplement the defect in conventional teaching, make modernized teaching reform real
It walks to enter the classroom, is the inexorable trend of current development of educational cause.
The blackboard of existing teaching or displaying class is mostly that one piece of plate face is fixed on wall or holder, realizes the basis of blackboard
Function is added some ancillary equipments, is had the following disadvantages further according to some use demands：
For example, application No. is 201010528681.0, patent name is the patent of invention of blackboard：
Board eraser, the setting of blackboard bottom is arranged at the top of blackboard by setting blackboard to two-layer composite in it
Chalk ash collection box so that in blackboard wiping, pull the handle of board eraser lower part, the word on entire blackboard that can all dry
Only.Meanwhile the chalk ash collection box of blackboard bottom, dust pollution can be prevented.
But existing blackboard has the following defects：
(1) existing blackboard is all fixed so that the exhibition of writing and blackboard bottom content at the top of blackboard
Show all very inconvenient, to influence teaching or show effect；
(2) existing blackboard, especially in the big blackboard of lyceum, it is easy to appear reflective phenomenons so that classroom both sides
Student is difficult the content for seeing blackboard clearly, and the quality of teaching is made to reduce；
(3) although existing blackboard is provided with chalk ash collection box and still can cause powder when wiping word
Waving for pen ash, not only pollutes environment, can also influence the health of teacher, student.
Invention content
It, should in order to overcome the shortcomings of that prior art, the present invention provide a kind of reflection prevention blackboard of height-adjustable type
Device can freely adjust the height of blackboard so that and it is write on blackboard and the displaying of plate face content is more convenient, meanwhile, energy
Enough blackboard is avoided reflective phenomenon occur, make the better quality of teaching, moreover it is possible to avoid flying upward for chalk dust, is conducive to protect
The health of environment and protection teacher, student, can effectively solve the problem that the problem of background technology proposes.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of reflection prevention blackboard of height-adjustable type, including fixed after-frame, the surface of the fixed after-frame is provided with four
The sliding rail of Duan Shuzhi, and the surface of sliding rail is provided with vertical chute, it is set on the sliding rail described in two sections of inside
It is equipped with height adjustable blackboard structure, the both sides of the height adjustable blackboard structure are respectively connected with reflection prevention blackboard structure, and in height
It is provided with environmental protection in degree adjustable blackboard structure and inhales grey structure；
The height adjustable blackboard structure includes the main blackboard being located at immediately ahead of fixed after-frame, and in the rear surface of main blackboard
Both sides have been fixedly connected with vertical draw runner, and the vertical draw runner is stuck on corresponding vertical chute, the fixed after-frame
Bottom surface is installed with linear motor, and the output end of linear motor is connected with drive rod, and the top of the drive rod passes through admittedly
Determine after-frame and is fixedly connected with the bottom end of main blackboard.
Further, the reflection prevention blackboard structure includes the fixation back plate being fixedly connected with main blackboard side, and fixed
There are secondary blackboard, the rear surface outer end of the fixed back plate to be fixedly connected with vertical cunning by hinge connection on the inside of the front surface of back plate
Item, and vertical draw runner is stuck on the vertical chute in corresponding outside.
Further, it includes the ash collection slot being fixedly connected respectively with main blackboard, secondary blackboard bottom surface that grey structure is inhaled in the environmental protection,
And the top surface of ash collection slot is provided with strip gab groove, the inside of the ash collection slot is installed with wind turbine, and in ash collection slot
Bottom is connected with ash bucket.
Further, the section of the vertical draw runner and vertical chute is " T " shape structure, and in the bottom surface of vertical draw runner
It is provided with equally distributed roller groove, the both sides of the roller groove are both provided with rotary axis groove, and are inserted in two rotary axis grooves
The outer cover of rotary shaft, the rotary shaft is equipped with idler wheel.
Further, it is connect with fixed back plate by adjustment spring on the outside of the rear surface of the secondary blackboard, and in secondary blackboard
Bottom end be connected with fixed chain, the end of the fixed chain is connected with buckle, and the bottom end of the main blackboard is provided with card slot,
And card slot is matched with buckle.
Further, the outer cover of the linear motor is equipped with sound proof box, and drive rod passes through sound proof box, the sound proof box
The junction of drive rod is provided with sound-proof material.
Further, the front surface of the main blackboard is provided with the arcwall face being recessed backward.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention is by being arranged height adjustable blackboard structure so that main blackboard and secondary blackboard can be in linear motors
It is moved up and down along sliding rail under drive, enabling the height that blackboard is adjusted according to actual use situation can facilitate
It is write at the top of blackboard, and the displaying of energy Convenient blackboard bottom content, is conducive to improve teaching efficiency；
(2) present invention is by being arranged reflection prevention blackboard structure so that can adjust main blackboard on both sides pair blackboard with sunlight conditions
Angle so that blackboard is whole always will not be reflective so that the student on classroom both sides can also see the content of blackboard clearly, make teaching
Quality higher；
(3) present invention, which passes through, is arranged environmental protection and inhales grey structure so that the chalk dust generated when blackboard wiping being capable of quick quilt
Suck ash collection slot so that chalk dust is not had around blackboard and is waved, can either environmental protection, and can protect that academics and students' is strong
Health.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the overlooking structure diagram of the present invention；
Fig. 3 is the sliding rail cross section structure schematic diagram of the present invention.
Figure label：
1- fixes after-frame；2- sliding rails；3- vertical chutes；4- height adjustable blackboard structures；5- reflection prevention blackboard structures；
Grey structure is inhaled in 6- environmental protection；
The main blackboards of 401-；The vertical draw runners of 402-；403- linear motors；404- drive rods；405- roller grooves；406- shafts
Slot；407- rotary shafts；408- idler wheels；409- sound proof boxs；410- sound-proof materials；
501- fixes back plate；502- hinges；503- pair blackboards；504- adjustment springs；505- fixes chain；506- is buckled；
507- card slots；508- arcwall faces；
601- ash collection slots；602- strip gab grooves；603- wind turbines；604- ash buckets.
Specific implementation mode
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 describes, 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.
As shown in Figure 1 to Figure 3, the present invention provides a kind of reflection prevention blackboards of height-adjustable type, including fixed after-frame
1, fixed after-frame 1 is fixed on the wall, and is used to support device, while the carrying of device can be made more convenient, certainly, if not examining
Consider and carry, can also not have to fixed after-frame 1, directly be fixed on the wall device.
The surface of fixed after-frame 1 is provided with four sections of vertical sliding rails 2, and is provided on the surface of sliding rail 2 perpendicular
Straight runner 3 is provided with height adjustable blackboard structure 4 on the sliding rail 2 that two sections of inside, and height adjustable blackboard structure 4 is for real
Existing blackboard whole height is freely adjusted so that device can adjust height, height adjustable blackboard according to actual service condition
The both sides of structure 4 are respectively connected with reflection prevention blackboard structure 5, and are provided with environmental protection in height adjustable blackboard structure 4 and inhale grey structure
6, reflection prevention blackboard structure 5 is for realizing the reflection-proof of blackboard entirety, the environmentally friendly absorption for inhaling grey structure 6 for realizing chalk dust.
Height adjustable blackboard structure 4 includes the main blackboard 401 being located at immediately ahead of fixed after-frame 1, and after main blackboard 401
Surface both sides have been fixedly connected with vertical draw runner 402, and vertical draw runner 402 is stuck on corresponding vertical chute 3, fixed after-frame
1 bottom surface is installed with linear motor 403, and the output end of linear motor 403 is connected with drive rod 404, drive rod 404
Top passes through fixed after-frame 1 and is fixedly connected with the bottom end of main blackboard 401, and linear motor 403 is arranged to the bottom of frame 1 after fixation
Face can increase the moving range of main blackboard 401, and the range of adjusting height is made also to increase.
When linear motor 403 works, it can make main blackboard 401 under the drive of drive rod 404 along about 3 vertical chute
It is mobile so that the height of main blackboard 401 can realize free adjusting so that in teaching process, the displaying of blackboard bottom content
It is all more convenient with the writing of content at the top of blackboard, the academics and students of different heights can be also applicable in, keep teaching more suitable
The progress of profit.
The outer cover of linear motor 403 be equipped with sound proof box 409, and drive rod 404 pass through sound proof box 409, sound proof box 409 with
The junction of drive rod 404 is provided with sound-proof material 410, and sound proof box 409 and sound-proof material 410 can completely cut off the work of linear motor 403
The sound of generation so that device not will produce noise pollution, not interfere with the study of student in classroom.
Reflection prevention blackboard structure 5 includes the fixation back plate 501 being fixedly connected with 401 side of main blackboard, and fixed back plate 501
Front surface on the inside of secondary blackboard 503 is connected with by hinge 502 so that secondary blackboard 503 can rotate around hinge 502, thus
The angle of adjustment pair blackboard 503, secondary blackboard 503 can either increase the area of blackboard entirety, and energy for assisting main blackboard 401
The reflective of blackboard is enough prevented, simultaneously so that secondary blackboard 503 can be lifted with the lifting of main blackboard 401 so that blackboard is whole
Height can adjust jointly, keep the use of blackboard more convenient.
The front surface of main blackboard 401 is provided with the arcwall face 508 being recessed backward, and arcwall face 508 can avoid main blackboard 401
It is reflective so that during the use of device, the secondary blackboard 503 of 401 both sides of main blackboard can be adjusted in due course according to sunlight
Angle so that blackboard will not integrally be influenced by reflective so that the student of classroom both sides is also it can clearly be seen that blackboard
Content so that the effect of blackboard aided education is more preferable.
It is connect with fixed back plate 501 by adjustment spring 504 on the outside of the rear surface of secondary blackboard 503, and in secondary blackboard 503
Bottom end is connected with fixed chain 505, and the end of fixed chain 505 is connected with buckle 506, and the bottom end of main blackboard 401 is provided with card
Slot 507, and card slot 507 is matched with buckle 506 so that after adjusting certain angle in secondary blackboard 503, adjustment spring can be passed through
504 pulling force is with fixed chain 505 so that secondary blackboard 503 is fixed so that writing is more convenient on secondary blackboard 503, is not in
The phenomenon that pair blackboard 503 is shaken when writing.
The rear surface outer end of fixed back plate 501 is fixedly connected with vertical draw runner 402, and vertical draw runner 402 is stuck in pair
On the vertical chute 3 in the outside answered, the section of vertical draw runner 402 and vertical chute 3 is " T " shape structure so that vertical draw runner
402 can move in vertical chute 3, and without departing from vertical chute 3, to make main blackboard 401 and fixed back plate 501 will not
It is detached from fixed after-frame 1.
The bottom surface of vertical draw runner 402 is provided with equally distributed roller groove 405, and the both sides of roller groove 405, which are both provided with, to be turned
Axial trough 406, and rotary shaft 407 is inserted in two rotary axis grooves 406, the outer cover of rotary shaft 407 is equipped with idler wheel 408, idler wheel
408 slightly protrude roller groove 405 so that idler wheel 408 can roll in roller groove 405 so that vertical draw runner 402 is being slided vertically
3 sliding is lighter on slot, can be excessive to avoid the frictional force between vertical draw runner 402 and vertical chute 3.
It includes the ash collection slot 601 being fixedly connected respectively with main blackboard 401,503 bottom surface of secondary blackboard that grey structure 6 is inhaled in environmental protection, and
The top surface of ash collection slot 601 is provided with strip gab groove 602, the inside of ash collection slot 601 is installed with wind turbine 603, and is collecting
The bottom of ash-pit 601 is connected with ash bucket 604, and strip gab groove 602 is narrow opening so that when wind turbine 603 works, bar shaped is opened
The suction bigger of mouth slot 602 so that the chalk dust around blackboard can be quickly drawn onto in ash collection slot 601 so that chalk dust
It does not pollute the environment, and the health of academics and students can be protected, ash bucket 604 is back taper, can be put into ash bucket 604
Water is not only convenient to clean chalk dust, but also can prevent reentrainment of dust, in addition, by main blackboard 401, the collection ash of 503 bottom of secondary blackboard connection
Slot 601 separates so that can start different wind turbines 603 according to the difference in blackboard wiping region so that ash collection slot 601 absorbs
The effect of chalk dust is more preferable, and can economize on resources.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (7)
1. a kind of reflection prevention blackboard of height-adjustable type, including fixed after-frame (1), it is characterised in that：The fixed after-frame (1)
Surface be provided with four sections of vertical sliding rails (2), and the surface of sliding rail (2) is provided with vertical chute (3), inside
It is provided with height adjustable blackboard structure (4) on sliding rail (2) described in two sections, the two of the height adjustable blackboard structure (4)
Side is respectively connected with reflection prevention blackboard structure (5), and is provided with environmental protection in height adjustable blackboard structure (4) and inhales grey structure (6)；
The height adjustable blackboard structure (4) includes the main blackboard (401) being located at immediately ahead of fixed after-frame (1), and in main blackboard
(401) rear surface both sides have been fixedly connected with vertical draw runner (402), and the vertical draw runner (402) is stuck in corresponding perpendicular
On straight runner (3), the bottom surface of the fixed after-frame (1) is installed with linear motor (403), and linear motor (403) is defeated
Outlet is connected with drive rod (404), the top of the drive rod (404) pass through fixed after-frame (1) and with the bottom of main blackboard (401)
End is fixedly connected.
2. a kind of reflection prevention blackboard of height-adjustable type according to claim 1, it is characterised in that：The reflection-proof is black
Harden structure (5) includes the fixation back plate (501) being fixedly connected with main blackboard (401) side, and the front surface of fixed back plate (501)
Inside is connected with secondary blackboard (503) by hinge (502), and the rear surface outer end of the fixed back plate (501) is fixedly connected with perpendicular
Straight draw runner (402), and vertical draw runner (402) is stuck on the vertical chute (3) in corresponding outside.
3. a kind of reflection prevention blackboard of height-adjustable type according to claim 1, it is characterised in that：Ash is inhaled in the environmental protection
Structure (6) includes the ash collection slot (601) being fixedly connected respectively with main blackboard (401), secondary blackboard (503) bottom surface, and in ash collection slot
(601) top surface is provided with strip gab groove (602), and the inside of the ash collection slot (601) is installed with wind turbine (603), and
It is connected with ash bucket (604) in the bottom of ash collection slot (601).
4. a kind of reflection prevention blackboard of height-adjustable type according to claim 1, it is characterised in that：The vertical draw runner
(402) and the section of vertical chute (3) is " T " shape structure, and is provided in the bottom surface of vertical draw runner (402) equally distributed
The both sides of roller groove (405), the roller groove (405) are both provided with rotary axis groove (406), and in two rotary axis groove (406) interpolations
Equipped with rotary shaft (407), the outer cover of the rotary shaft (407) is equipped with idler wheel (408).
5. a kind of reflection prevention blackboard of height-adjustable type according to claim 2, it is characterised in that：The pair blackboard
(503) it is connect with fixed back plate (501) by adjustment spring (504) on the outside of rear surface, and connected in the bottom end of secondary blackboard (503)
It is connected to fixed chain (505), the end of the fixed chain (505) is connected with buckle (506), the bottom of the main blackboard (401)
End is provided with card slot (507), and card slot (507) is matched with buckle (506).
6. a kind of reflection prevention blackboard of height-adjustable type according to claim 1, it is characterised in that：The linear motor
(403) outer cover is equipped with sound proof box (409), and drive rod (404) passes through sound proof box (409), the sound proof box (409) and drive
The junction of lever (404) is provided with sound-proof material (410).
7. a kind of reflection prevention blackboard of height-adjustable type according to claim 1, it is characterised in that：The main blackboard
(401) front surface is provided with the arcwall face (508) being recessed backward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464630.4A CN108297578A (en) | 2017-12-28 | 2017-12-28 | A kind of reflection prevention blackboard of height-adjustable type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711464630.4A CN108297578A (en) | 2017-12-28 | 2017-12-28 | A kind of reflection prevention blackboard of height-adjustable type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108297578A true CN108297578A (en) | 2018-07-20 |
Family
ID=62867720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711464630.4A Pending CN108297578A (en) | 2017-12-28 | 2017-12-28 | A kind of reflection prevention blackboard of height-adjustable type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108297578A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113352804A (en) * | 2021-07-01 | 2021-09-07 | 逸谦教育科技(上海)有限公司 | Blackboard frame for weakening diffuse reflection based on panel angle change |
| CN113511021A (en) * | 2021-05-27 | 2021-10-19 | 浙江工业职业技术学院 | Blackboard with light and projection function |
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| US5775919A (en) * | 1997-02-12 | 1998-07-07 | Right Message, L.L.C. | Combination bulletin/write board |
| WO1998054689A1 (en) * | 1997-05-29 | 1998-12-03 | Shozo Hirayama | Optical dot image display |
| CN202716629U (en) * | 2012-08-16 | 2013-02-06 | 薛瑞 | Anti-glare blackboard |
| CN203920127U (en) * | 2014-07-01 | 2014-11-05 | 韦唯 | A kind of multifunctional environment friendly blackboard |
| CN204149717U (en) * | 2014-10-03 | 2015-02-11 | 师海满 | A kind of reflection prevention blackboard |
| CN204222467U (en) * | 2014-11-18 | 2015-03-25 | 北京信息科技大学 | A kind of reflection-proof and adjustable for height blackboard |
| CN204955836U (en) * | 2015-07-31 | 2016-01-13 | 何纪江 | Anti -reflective height -adjustable blackboard |
| CN205631864U (en) * | 2016-04-18 | 2016-10-12 | 郑州澍青医学高等专科学校 | Education learning auxiliary tool |
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2017
- 2017-12-28 CN CN201711464630.4A patent/CN108297578A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5775919A (en) * | 1997-02-12 | 1998-07-07 | Right Message, L.L.C. | Combination bulletin/write board |
| WO1998054689A1 (en) * | 1997-05-29 | 1998-12-03 | Shozo Hirayama | Optical dot image display |
| CN202716629U (en) * | 2012-08-16 | 2013-02-06 | 薛瑞 | Anti-glare blackboard |
| CN203920127U (en) * | 2014-07-01 | 2014-11-05 | 韦唯 | A kind of multifunctional environment friendly blackboard |
| CN204149717U (en) * | 2014-10-03 | 2015-02-11 | 师海满 | A kind of reflection prevention blackboard |
| CN204222467U (en) * | 2014-11-18 | 2015-03-25 | 北京信息科技大学 | A kind of reflection-proof and adjustable for height blackboard |
| CN204955836U (en) * | 2015-07-31 | 2016-01-13 | 何纪江 | Anti -reflective height -adjustable blackboard |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113511021A (en) * | 2021-05-27 | 2021-10-19 | 浙江工业职业技术学院 | Blackboard with light and projection function |
| CN113352804A (en) * | 2021-07-01 | 2021-09-07 | 逸谦教育科技(上海)有限公司 | Blackboard frame for weakening diffuse reflection based on panel angle change |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180720 |
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| RJ01 | Rejection of invention patent application after publication |