CN114161868A - Folding blackboard - Google Patents
Folding blackboard Download PDFInfo
- Publication number
- CN114161868A CN114161868A CN202210041347.5A CN202210041347A CN114161868A CN 114161868 A CN114161868 A CN 114161868A CN 202210041347 A CN202210041347 A CN 202210041347A CN 114161868 A CN114161868 A CN 114161868A
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- China
- Prior art keywords
- blackboard
- frame
- folding
- sliding
- track
- 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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- 230000007246 mechanism Effects 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
Images
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
Abstract
The invention discloses a folding blackboard, which comprises a frame, an inner layer blackboard and an outer layer blackboard arranged on the side edge of the inner layer blackboard, wherein the length direction of the blackboard is defined as X direction, the thickness direction is Y direction, the height direction is Z direction, the inner layer blackboard and the outer layer blackboard are connected with the frame in a sliding way, the frame is provided with a long guide rail for the inner layer blackboard and the outer layer blackboard to move in the X direction, the frame is provided with a short guide rail for the layer blackboard and the outer layer blackboard to move in the Y direction, the device can realize the sliding of the blackboard in the horizontal left-right direction and the front-back direction through a slide rail arranged on the upper side surface and the lower side surface of the blackboard frame and a cross slide mechanism connected with the slide rail in a sliding way, when a display screen of the blackboard needs to be opened, the outer layer blackboard moves to the rear side according to a track groove, the inner layer blackboard moves to two sides of the display screen according to the track, and the unfolded blackboard and the display screen are in the same plane, the content of the blackboard or display screen is prevented from being blocked.
Description
Technical Field
The invention relates to the field of teaching aid equipment, in particular to a folding blackboard.
Background
The blackboard is a common tool for teaching. The push-pull blackboard is also called a composite blackboard, is a novel writing board which is popular in schools in all areas in recent two years, the use of the push-pull blackboard is the same as that of a common teaching blackboard, but after two boards blocked outside are pushed away, an interactive electronic whiteboard or a liquid crystal touch television appears, so that electrified education can be realized, the maximum effect of the push-pull blackboard is in the position, the traditional teaching and the modern teaching are combined, and the writing board and the electronic whiteboard are switched at will, so that the electronic teaching board is simple and convenient.
Accordingly, a push-pull type blackboard composed of a plurality of blackboards has appeared on the market very early. For example, publication No. CN205468100U discloses a push-and-pull blackboard, including a both ends open-ended frame, the frame is two layer structure around, a display screen is installed to frame back layer, frame front layer slides and sets up two blackboards, when people need use the blackboard, pushes away the blackboard to the middle part and hides the display screen, as long as push away the blackboard to both sides when using the display screen, the push-and-pull blackboard of this kind of structure simply is in the same place display screen and blackboard.
Although the mode has a simple structure, saves space and is convenient to use, the mode also has a plurality of defects, such as unsmooth sliding, the two blackboards are not positioned on the same plane with the display screen when being unfolded, a part of contents are blocked by the blackboards on the outer sides, and labor and time are wasted because the blackboards can only be pushed and pulled manually and cannot be automatically controlled. There is a need for a folding blackboard that solves the above problems.
Disclosure of Invention
In order to solve the technical problem, the invention provides a folding blackboard which can effectively solve the problem that an unfolded blackboard and a display screen are not on the same plane.
The technical scheme of the invention is as follows:
the utility model provides a folding blackboard, includes frame, inlayer blackboard and locates the outer blackboard of inlayer blackboard side, the length direction of definition blackboard are the X direction, and the thickness direction is the Y direction, and the direction of height is the Z direction, inlayer blackboard and outer blackboard sliding connection in the frame, the frame is equipped with the long guide rail that supplies inlayer blackboard and outer blackboard to remove on the X direction, the frame is equipped with the short guide rail that supplies layer blackboard and outer blackboard to remove on the Y direction.
Preferably, still include cross sliding mechanism, the blackboard passes through cross sliding mechanism realizes along the slip of X direction and Y direction, cross sliding mechanism includes top shoe and the lower slider that upper and lower cross set up, the top shoe with long guide rail sliding connection, the lower slider with short guide rail sliding connection, be equipped with the connecting seat between top shoe and the lower slider.
The folding blackboard according to claim 1, wherein the inner blackboard and the outer blackboard are provided with mounting plates, and the short guide rail is fixedly connected with the mounting plates.
Preferably, the frame is provided with a track guide plate, the track guide plate is connected with the frame through a support block, and the track guide plate is provided with an inner track groove and an outer track groove for movably guiding the inner layer blackboard and the outer layer blackboard.
Preferably, the mounting plate is provided with a driven rotor, and the driven rotor is arranged in the track groove of the track guide plate and is in sliding connection with the track groove.
Preferably, a rotating shaft is arranged in the center of the driven rotor, and one end of the rotating shaft is connected with the mounting plate through a nut.
Preferably, the frame is provided with an electric eccentric rotating shaft, the electric eccentric rotating shaft is fixedly connected with the mounting plate of the outer blackboard, and the electric eccentric rotating shaft can drive the outer blackboard to move circumferentially.
Preferably, the frame is provided with a conveying mechanism, and the conveying mechanism comprises two driving wheels and a driving belt tensioned between the driving wheels.
Preferably, the transmission belt is connected with a cross sliding mechanism of the inner blackboard, and the transmission belt drives the inner blackboard to move along the transmission belt.
Preferably, the mounting plate is provided with a handle for manually sliding the blackboard.
The beneficial technical effects of the invention are as follows:
the blackboard device can realize the horizontal sliding of the blackboard in the left-right direction and the front-back direction through the sliding rails arranged on the upper side and the lower side of the blackboard frame and the cross sliding mechanism in sliding connection with the sliding rails, the blackboard can move according to the shape of the track groove through the track groove formed in the track guide plate, when a display screen of the blackboard needs to be opened, the outer layer blackboard moves to the rear side according to the track groove, the inner layer blackboard moves to two sides of the display screen according to the track, the unfolded blackboard and the display screen are positioned on the same plane, the content of the blackboard or the display screen is prevented from being shielded, and meanwhile, the fluency of blackboard writing is improved.
The device drives the blackboard to move along the track groove of the track guide plate through the electric eccentric rotating shaft and the transmission mechanism arranged on the frame and driven by the motor, so that the blackboard can be electrically controlled to be unfolded and closed, and meanwhile, the mounting plate of the folding blackboard is provided with the handle, so that the blackboard can be manually controlled to be unfolded and closed along the track groove in a sliding way.
The device is convenient for the blackboard to slide through the sliding between the sliding rail and the sliding groove, and the mounting plate is provided with the driven rotor which is movably connected with the track groove of the track guide plate, so that the blackboard is smooth and effortless when being manually pushed, pulled and unfolded or electrically unfolded.
Drawings
FIG. 1 is a front view schematically showing the structure of the folding blackboard according to the present invention in a closed state;
FIG. 2 is a front view schematically showing the unfolded state of the folding blackboard according to the present invention;
FIG. 3 is an enlarged view of the front structure of the folded blackboard of the present invention in the unfolded state;
FIG. 4 is a schematic view of the structure of the folding blackboard display screen and the frame of the present invention;
FIG. 5 is a schematic structural view of a cross sliding mechanism and a long guide rail of the folding blackboard of the present invention;
FIG. 6 is a schematic structural view of the cross sliding mechanism and the mounting plate of the folding blackboard of the present invention;
FIG. 7 is a schematic view showing a back structure of the folding blackboard in a closed state according to the present invention;
FIG. 8 is an enlarged view of a detail of the structure of the present invention at A;
FIG. 9 is a back view showing the back structure of the folded blackboard of the present invention in the unfolded state;
FIG. 10 is an enlarged view of a detail of the structure of the present invention at B;
FIG. 11 is a plan view showing a closed state of the folding blackboard of the present invention;
FIG. 12 is a plan view showing an unfolded state of the folding blackboard of the present invention;
FIG. 13 is a schematic structural view of a driven rotor and a mounting plate of the folding blackboard of the present invention;
FIG. 14 is a schematic structural view of a folding blackboard trajectory guide plate of the present invention;
FIG. 15 is a schematic structural view of an electric eccentric rotary shaft of the folding blackboard according to the present invention;
fig. 16 is a schematic structural view of the folding blackboard transport mechanism of the present invention.
In the figure:
1-frame, 2-display screen, 3-inner layer blackboard, 4-outer layer blackboard, 5-long guide rail, 6-upper slide block, 7-lower slide block, 8-connecting seat, 9-short guide rail, 10-mounting plate, 11-track guide plate, 12-inner track groove, 13-outer track groove, 14-driven rotor, 15-electric eccentric rotating shaft, 16-conveying wheel, 17-conveying belt, 18-handle, 19-supporting block, 20-rotating shaft, 21-nut and 22-eccentric shaft.
Detailed Description
In order to make the technical means of the present invention clearer and to make the technical means of the present invention capable of being implemented according to the content of the specification, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples, which are provided for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific embodiment discloses a folding blackboard in detail, which comprises a frame 1, an inner layer blackboard 3 and an outer layer blackboard 4 arranged on the side edge of the inner layer blackboard 3, wherein the length direction of the blackboard is defined as the X direction, the thickness direction is defined as the Y direction, the height direction is defined as the Z direction, the inner layer blackboard and the outer layer blackboard are connected with the frame in a sliding way, the frame 1 is provided with a long guide rail 5 for the inner layer blackboard and the outer layer blackboard to move in the X direction, the long guide rail is arranged at the bottom of the frame along the X direction, the inner layer blackboard and the outer layer blackboard are connected with the long guide rail in a sliding way, so that the blackboards can move in the X direction, the frame 1 is provided with a short guide rail 9 for the inner layer blackboard and the outer layer blackboard to move in the Y direction, the short guide rail is arranged at the bottom of the frame along the Y direction, and the inner layer blackboard and the outer layer blackboard are connected with the short guide rail in a sliding mode, so that the blackboards can move in the Y direction. This part structure can make inlayer blackboard and outer blackboard can follow X direction and Y direction removal through the long slide rail that the frame set up and short slide rail, make inlayer blackboard and outer blackboard can slide the folding of realization blackboard on the frame, inlayer blackboard rear side can set up display screen or other display device, thereby make the inlayer blackboard press the orbit to move to the both sides of display screen, blackboard and display screen after can launching are in the coplanar, prevent that the content of blackboard or display screen from being sheltered from, the smoothness nature of blackboard-writing has been promoted simultaneously.
Further, still include cross slide mechanism, the blackboard passes through cross slide mechanism realizes along the slip of X axle and Y axle, cross slide mechanism includes upper slide 6 and lower slider 7 that upper and lower cross set up, the upper slide with long guide rail sliding connection, lower slider 7 with short guide rail 9 sliding connection, be equipped with connecting seat 8 between upper slide 6 and the lower slider 7.
The cross sliding mechanism can slide left and right on the long slide rails through the long slide rails arranged on the upper side surface and the lower side surface of the frame, the blackboard is connected with the cross sliding mechanism to move in the front-rear direction, the inner layer blackboard and the outer layer blackboard can move to the two sides of the display screen, and the display screen and the blackboard can be located on the same plane. The cross sliding mechanism can drive the blackboard to slide in two cross directions through the upper sliding block and the lower sliding block which are arranged in a cross manner and arranged on the cross sliding mechanism, the upper sliding block is connected with the long sliding rail in a sliding manner so as to slide in the direction of the long sliding rail, and the lower sliding block is connected with the short sliding rail in a sliding manner so as to move together with the blackboard along the direction of the short sliding rail.
Further, the inner layer blackboard 3 and the outer layer blackboard 4 are both provided with mounting plates 10, and the short guide rails 9 are fixedly connected with the mounting plates 10.
Further, the bottom of the frame 1 is provided with a track guide plate 11, the track guide plate is connected with the frame 1 through a supporting block 19, and the track guide plate 11 is provided with an inner track groove 12 and an outer track groove 13 for guiding the inner layer blackboard 3 and the outer layer blackboard to move 4. The blackboard can move according to the track groove through the track guide plate and the track groove, the track groove of the inner layer blackboard is different from that of the outer layer blackboard, the outer track groove is semicircular, and the inner track groove is a linear track groove and a semicircular track groove tangent to the linear track groove.
Further, a mounting plate 10 at the bottom of the frame is provided with a driven rotor 14, the driven rotor 14 is arranged in a track groove of the track guide plate 11 and is in sliding connection with the track groove, a rotating shaft 20 is arranged at the center of the driven rotor 14 and is in rotating connection with the rotating shaft, and one end of the rotating shaft 20 is connected with the mounting plate through a nut 21. The part of the structure can be connected with the track groove in a sliding manner through the driven rotor, so that the blackboard can slide in the track groove conveniently, and is smooth and effortless when being manually pushed, pulled and unfolded or electrically unfolded.
Further, the frame is provided with an electric eccentric rotating shaft 15, an eccentric shaft 22 of the electric eccentric rotating shaft 15 is connected with the mounting plate 10, the electric eccentric rotating shaft 15 is arranged on the upper side edge or the lower side edge of the frame, the electric eccentric rotating shaft 15 is fixedly connected with the mounting plate 10 of the outer blackboard, and the electric eccentric rotating shaft can drive the outer blackboard to move circumferentially. The partial structure can drive the electric eccentric shaft to rotate around the central shaft of the electric eccentric shaft through the motor, the radius of the eccentric shaft is the same as that of a semicircular ring of the track groove below the outer blackboard, the mounting plate and the outer blackboard are driven to move according to the semicircular track groove through the rotation of the electric eccentric shaft, and the outer blackboard is electrically controlled to be unfolded and closed.
Further, the frame is provided with a transmission mechanism, the transmission mechanism comprises two transmission wheels 16 and a transmission belt 17 tensioned between the transmission wheels, the transmission belt 17 is connected with the cross sliding mechanism of the inner blackboard 3, the transmission drives the inner blackboard to move along the transmission belt, and the transmission belt can be a transmission chain or a transmission belt. The part of the structure can pass through a conveying mechanism arranged through a frame, the conveying mechanism is driven by two transmission wheels, the two transmission wheels are connected through a transmission belt, the transmission belt is connected with a cross sliding mechanism of an inner blackboard, and the inner blackboard slides according to a track groove through the transmission belt.
Further, the mounting plate 10 is provided with a handle 18 for manually sliding the blackboard. The partial structure can manually control the sliding opening and closing of the blackboard through a handle.
Further, the outer layer blackboard 4 and the inner layer blackboard 3 are both provided with four cross sliding mechanisms, and the upper side face and the lower side face of the outer layer blackboard 4 and the upper side face and the lower side face of the inner layer blackboard 3 are respectively provided with two cross sliding mechanisms. The partial structure can be provided with two cross sliding mechanisms respectively from top to bottom through the outer layer blackboard and the inner layer blackboard, so that the fixed blackboard can be stably arranged, the stability of the blackboard during sliding is ensured, and the blackboard can be stably unfolded and closed.
The working principle of the invention is as follows:
the invention is characterized in that a display screen is arranged in the middle of a blackboard frame, an inner layer blackboard at the front side of the display screen and outer layers blackboards at the left side and the right side of the inner layer blackboard are arranged on the same plane by the two inner layer blackboards and the two outer layer blackboards when the blackboards are closed, long guide rails are arranged on the upper side surface and the lower side surface of the frame when the blackboards are unfolded, and a cross sliding mechanism is arranged on the long guide rails, so that the blackboards can slide in two crossed front-back directions and left-right directions, a track guide plate is arranged at the bottom of an installation plate, the track guide plate is provided with a track groove, the blackboards slide according to the shape of the track groove of the track guide plate, the outer layer blackboard slides to the back side according to the outer track groove when the blackboards are unfolded, then the inner layer blackboards slide to the two sides of the display screen to enable the display and the inner layer blackboards to be positioned on the same horizontal plane, when the inner layer blackboard is closed, the inner layer slides to the front side of the display according to the inner track groove, and then the outer layer blackboard is slid to the front side, so that the inner layer blackboard and the outer layer blackboard are positioned on the same plane. The inner blackboard can be unfolded and closed by a transmission wheel of a transmission mechanism and a transmission belt to drive the inner blackboard to slide according to the inner track groove, or can be driven by manually pushing a handle; the outer layer blackboard can be unfolded and closed by an eccentric rotating shaft driven by a motor to drive the mounting plate and the outer layer blackboard to slide according to the outer track groove, and also can be driven by manually pushing a handle.
The blackboard device can realize the horizontal left-right and front-back sliding of the blackboard through the sliding rails arranged on the upper side and the lower side of the blackboard frame and the cross sliding mechanism connected with the sliding rails in a sliding manner, the blackboard can move according to the shape of the track groove through the track groove formed in the track guide plate, when a display screen of the blackboard needs to be opened, the outer layer blackboard moves to the rear side according to the track groove, the inner layer blackboard moves to two sides of the display screen according to the track, the unfolded blackboard and the display screen are positioned on the same plane, the content of the blackboard or the display screen is prevented from being shielded, and meanwhile, the fluency of blackboard writing is improved. The device drives the blackboard to move along the track groove of the track guide plate through the electric eccentric rotating shaft and the transmission mechanism arranged on the frame and driven by the motor, so that the blackboard can be electrically controlled to be unfolded and closed, and meanwhile, the mounting plate of the folding blackboard is provided with the handle, so that the blackboard can be manually controlled to be unfolded and closed along the track groove in a sliding way. The device of the invention is convenient for the sliding of the blackboard through the sliding between the sliding rail and the sliding chute, and the mounting plate is provided with the driven rotor which is movably connected with the track groove of the track guide plate, and the blackboard is smooth and effortless when being manually pushed and pulled to be unfolded or electrically unfolded.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a folding blackboard, includes frame (1), inlayer blackboard (3) and locates outer blackboard (4) of inlayer blackboard (3) side, the length direction of definition blackboard is the X direction, and the thickness direction is the Y direction, and the direction of height is the Z direction, its characterized in that, inlayer blackboard and outer blackboard sliding connection in the frame, frame (1) is equipped with long guide rail (5) that supply inlayer blackboard (3) and outer blackboard (4) to remove on the X direction, frame (1) is equipped with short guide rail (9) that supply layer blackboard (3) and outer blackboard (4) to remove on the Y direction.
2. The folding blackboard according to claim 1, further comprising a cross sliding mechanism, wherein the blackboard can slide along the X direction and the Y direction through the cross sliding mechanism, the cross sliding mechanism comprises an upper slider (6) and a lower slider (7) which are arranged crosswise, the upper slider is connected with the long guide rail in a sliding manner, the lower slider (7) is connected with the short guide rail (9) in a sliding manner, and a connecting seat (8) is arranged between the upper slider (6) and the lower slider (7).
3. A folding blackboard according to claim 1, characterised in that the inner blackboard (3) and the outer blackboard (4) are both provided with mounting plates (10), the short guide rails (9) being fixedly connected with the mounting plates (10).
4. A foldable blackboard according to claim 3, characterised in that the frame (1) is provided with a track guide plate (11), the track guide plate (11) is connected with the frame (1) through a support block (19), the track guide plate (11) is provided with an inner track groove (12) and an outer track groove (13) for guiding the inner blackboard (3) and the outer blackboard (4) to move.
5. A folding blackboard according to claim 4, characterised in that the mounting plate (10) is provided with a driven rotor (14), the driven rotor (14) being arranged in and slidingly connected to the trajectory groove of the trajectory guide plate (11).
6. A folding blackboard according to claim 5, characterised in that the driven rotor (11) has a shaft (20) in its centre, one end of the shaft (20) being connected to the mounting plate (10) by means of a nut (21).
7. A folding blackboard according to claim 1, characterised in that the frame (1) is provided with an electric eccentric shaft (15), the electric eccentric shaft (15) is fixedly connected with the mounting plate of the outer blackboard, and the electric eccentric shaft can drive the outer blackboard to move circumferentially.
8. A folding blackboard according to claim 1, characterised in that the frame (1) is provided with a transmission mechanism comprising two transmission wheels (16) and a transmission belt (17) tensioned between them.
9. A folding blackboard according to claim 8, characterised in that the belt (17) is connected to the cross-slide mechanism of the inner blackboard (3), which moves it along the belt.
10. A folding blackboard according to claim 1, characterised in that the mounting plate (10) is provided with a handle (18) for manual sliding of the blackboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041347.5A CN114161868A (en) | 2022-01-14 | 2022-01-14 | Folding blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041347.5A CN114161868A (en) | 2022-01-14 | 2022-01-14 | Folding blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114161868A true CN114161868A (en) | 2022-03-11 |
Family
ID=80489271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210041347.5A Pending CN114161868A (en) | 2022-01-14 | 2022-01-14 | Folding blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114161868A (en) |
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| CN206999976U (en) * | 2017-03-31 | 2018-02-13 | 湖南一凡教学设备有限公司 | One kind becomes rail push-and-pull blackboard |
| CN208530084U (en) * | 2018-06-06 | 2019-02-22 | 李月 | A kind of four push-and-pull blackboards of no inside casing |
| CN209719050U (en) * | 2018-10-24 | 2019-12-03 | 山东蓝贝思特教装集团股份有限公司 | A kind of plane change rail push-and-pull blackboard |
| CN209904349U (en) * | 2019-04-26 | 2020-01-07 | 石家庄科达文教用品有限公司 | Rail-changing blackboard |
| CN111070945A (en) * | 2019-11-07 | 2020-04-28 | 陆安兵 | Rail-changing type push-pull blackboard |
| CN211795372U (en) * | 2019-11-28 | 2020-10-30 | 安徽泽育科技有限公司 | Writing board linear slideway track changing system |
| CN112721502A (en) * | 2020-12-29 | 2021-04-30 | 安徽鸿程光电有限公司 | Teaching blackboard |
| CN216942444U (en) * | 2022-01-14 | 2022-07-12 | 拓誉智能科技(惠州)有限公司 | Folding blackboard |
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2022
- 2022-01-14 CN CN202210041347.5A patent/CN114161868A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101298199B1 (en) * | 2013-05-31 | 2013-08-22 | 이항서 | Electric board with location movement and angle control means |
| CN203864256U (en) * | 2014-01-08 | 2014-10-08 | 陆安兵 | Teaching blackboard |
| CN206999976U (en) * | 2017-03-31 | 2018-02-13 | 湖南一凡教学设备有限公司 | One kind becomes rail push-and-pull blackboard |
| CN208530084U (en) * | 2018-06-06 | 2019-02-22 | 李月 | A kind of four push-and-pull blackboards of no inside casing |
| CN209719050U (en) * | 2018-10-24 | 2019-12-03 | 山东蓝贝思特教装集团股份有限公司 | A kind of plane change rail push-and-pull blackboard |
| CN209904349U (en) * | 2019-04-26 | 2020-01-07 | 石家庄科达文教用品有限公司 | Rail-changing blackboard |
| CN111070945A (en) * | 2019-11-07 | 2020-04-28 | 陆安兵 | Rail-changing type push-pull blackboard |
| CN211795372U (en) * | 2019-11-28 | 2020-10-30 | 安徽泽育科技有限公司 | Writing board linear slideway track changing system |
| CN112721502A (en) * | 2020-12-29 | 2021-04-30 | 安徽鸿程光电有限公司 | Teaching blackboard |
| CN216942444U (en) * | 2022-01-14 | 2022-07-12 | 拓誉智能科技(惠州)有限公司 | Folding blackboard |
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