CN217906932U - Electric push-pull combined blackboard - Google Patents
Electric push-pull combined blackboard Download PDFInfo
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- CN217906932U CN217906932U CN202221468434.0U CN202221468434U CN217906932U CN 217906932 U CN217906932 U CN 217906932U CN 202221468434 U CN202221468434 U CN 202221468434U CN 217906932 U CN217906932 U CN 217906932U
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- blackboard
- slide rail
- fixed
- pulley assembly
- pulley
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Abstract
The utility model relates to an electric push-pull combined blackboard, which comprises a fixed blackboard, a movable blackboard and a driving mechanism, wherein the top of the fixed blackboard is provided with a top slide rail with an upward opening, the bottom of the fixed blackboard is provided with a bottom slide rail with a downward opening, the top of the movable blackboard is provided with a top pulley assembly, and the top pulley assembly is arranged in the top slide rail in a rolling manner; the bottom of the movable blackboard is provided with a bottom pulley assembly, and the bottom pulley assembly is arranged in the bottom sliding rail in a rolling manner; the top interval of bottom slide rail is equipped with the nut piece, the top of bottom slide rail is fixed with actuating mechanism, the nut piece pass through the connecting plate with bottom loose pulley assembly connects, the nut piece with it is located respectively to remove the blackboard both sides around the fixed blackboard, actuating mechanism's drive end pass through the lead screw with nut piece transmission is connected and drives the nut piece along bottom slide rail lateral motion. The utility model discloses can realize the automatic movement control who removes the blackboard.
Description
Technical Field
The utility model relates to a teaching aid technical field, concretely relates to electronic push-and-pull combination blackboard.
Background
A push-pull combined blackboard is generally characterized in that a fixed blackboard is arranged at the back of the combined blackboard, a movable blackboard is arranged at the front of the combined blackboard, and the movable blackboard can be horizontally pushed, pulled and moved to increase the writing area. At present, the push-pull movement of the movable blackboard requires manually holding a handle on the movable blackboard for push-pull, and the push-pull to the position depends on physical blocking, so that the push-pull movement is relatively laborious.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve one kind or several kinds that prior art has technical problem, provide an electronic push-and-pull combination blackboard.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an electric push-pull combined blackboard comprises a fixed blackboard, a movable blackboard and a driving mechanism, wherein a top sliding rail with an upward opening is arranged at the top of the fixed blackboard, a bottom sliding rail with a downward opening is arranged at the bottom of the fixed blackboard, a top pulley assembly is arranged at the top of the movable blackboard, and the top pulley assembly is arranged in the top sliding rail in a rolling manner; the bottom of the movable blackboard is provided with a bottom pulley assembly, and the bottom pulley assembly is arranged in the bottom sliding rail in a rolling manner; the top interval of bottom slide rail is equipped with the nut piece, the top of bottom slide rail is fixed with actuating mechanism, the nut piece pass through the connecting plate with bottom loose pulley assembly connects, the nut piece with it is located respectively to remove the blackboard both sides around the fixed blackboard, actuating mechanism's drive end pass through the lead screw with nut piece transmission is connected and drives the nut piece along bottom slide rail lateral motion.
The utility model has the advantages that: the utility model discloses an electronic push-and-pull combination blackboard sets up the top slide rail that the opening faces upward through the top at fixed blackboard, sets up the bottom slide rail that the opening faces down in the bottom of fixed blackboard, because the opening of bottom slide rail arranges down, in the chalk dust can not fall into the bottom slide rail, avoids making the bottom slide rail because the chalk dust accumulates too much and takes place to block up, and then also need not clear up the bottom slide rail. The nut blocks are arranged above the bottom sliding rail at intervals, the driving mechanism can be utilized to drive the lead screw to rotate, and then the nut blocks and the movable blackboard are driven to move along the bottom sliding rail and the top sliding rail, so that the automatic movement control of the movable blackboard can be realized.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the connecting plate is an inverted L-shaped structure, the connecting plate of the inverted L-shaped structure is buckled and fixed on the top wall and the side wall of the nut block, and the lower end of the connecting plate extends downwards from one side of the bottom sliding rail and is connected with the bottom pulley assembly.
The beneficial effect of adopting the further scheme is that: through the connecting plate that sets up type of falling L structure, can be with the upper end lock of connecting plate on nut piece upper surface and side, make the connecting plate of type of falling L structure more reliable and more stable with being connected of nut piece.
Furthermore, a first mounting seat and a second mounting seat are fixed above the bottom sliding rail, the first mounting seat is fixed in the middle of the bottom sliding rail, the second mounting seat is fixed at a position adjacent to one end of the bottom sliding rail, and two ends of the lead screw are rotatably connected to the first mounting seat and the second mounting seat; the driving mechanism is installed in the middle of the bottom sliding rail, and the driving end of the driving mechanism is connected with the screw rod.
The beneficial effect of adopting the further scheme is that: through setting up two mount pads, conveniently fix a position the lead screw. The driving mechanism is arranged in the middle of the bottom sliding rail, so that the movable blackboard can conveniently move horizontally between the two ends of the fixed blackboard.
Furthermore, the two ends of the lead screw are respectively and rotatably connected to the first mounting seat and the second mounting seat through bearings.
The beneficial effect of adopting the further scheme is that: through setting up the bearing, make the lead screw more reliable and more stable with being connected of mount pad.
Furthermore, two opposite inner side walls of the top slide rail are respectively provided with a first roller groove, and two opposite inner side walls of the bottom slide rail are respectively provided with a second roller groove; the top pulley assembly is arranged in a first roller groove of the top sliding rail in a rolling manner, and the bottom pulley assembly is arranged in a second roller groove of the bottom sliding rail in a rolling manner.
The beneficial effect of adopting the above further scheme is: the first roller grooves are respectively arranged on the two opposite inner side walls of the top slide rail, the second roller grooves are respectively arranged on the two opposite inner side walls of the bottom slide rail, so that the axes of the top roller assembly and the bottom roller assembly are vertically arranged, the stress of the pulley assemblies is more uniform, and the movement of the moving blackboard is more balanced and stable.
Further, the dorsal part both ends of removing the blackboard are equipped with hall sensor respectively, the both ends of fixed blackboard be equipped with respectively with the inductor that hall sensor corresponds, hall sensor and the inductor respectively with actuating mechanism connects.
The beneficial effect of adopting the above further scheme is: through setting up hall sensor and inductor, after the removal blackboard reachd the setting position, can give the signal through hall sensor and inductor, make actuating mechanism stop the operation to realize moving the automatic of blackboard and open and stop.
Further, bottom loose pulley assembly includes bottom fixed plate and bottom pulley, the one end of bottom fixed plate is fixed the bottom of removal blackboard, the other end orientation of bottom fixed plate deviates from the direction of removing the blackboard extends and with connecting plate fixed connection, the bottom pulley is installed the other end top of bottom fixed plate, the bottom pulley rolls and is set up in the second gyro wheel inslot of bottom slide rail.
The beneficial effect of adopting the further scheme is that: through setting up the bottom fixed plate, can set up the bottom pulley in one side of removal blackboard, conveniently set up the bottom pulley in the second gyro wheel groove of bottom slide rail. The bottom fixing plate also enables stable structural support between the movable blackboard and the fixed blackboard.
Further, the bottom fixing plate is integrally connected with the connecting plate.
The beneficial effect of adopting the further scheme is that: convenient shaping, stable in structure.
Further, top loose pulley assembly includes top fixed plate and top pulley, the one end of top fixed plate is fixed the top of removal blackboard, the other end orientation of top fixed plate deviates from the direction of removal blackboard extends, the top pulley is installed the other end below of top fixed plate, the top pulley rolls and is set up in the first gyro wheel groove of top slide rail.
The beneficial effect of adopting the further scheme is that: through setting up the top fixed plate, can set up the top pulley in one side of removing the blackboard, conveniently set up the top pulley in the first gyro wheel inslot of top slide rail. The top fixing plate also enables stable structural support between the movable blackboard and the fixed blackboard.
Further, the driving mechanism is a driving motor.
Drawings
FIG. 1 is a schematic view of the three-dimensional structure of the electric push-pull combination blackboard of the present invention;
fig. 2 is a schematic view of a three-dimensional structure of the motor, a nut block and a lead screw of the present invention;
FIG. 3 is a schematic view of the three-dimensional structure of the nut block and the movable blackboard of the present invention;
FIG. 4 is an enlarged view of portion A of FIG. 3;
fig. 5 is a schematic structural view of the top sheave assembly of the present invention;
fig. 6 is a schematic structural view of the bottom sheave assembly of the present invention;
fig. 7 is the main view structure diagram of the movable blackboard and the fixed blackboard of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. fixing the blackboard; 11. a top slide rail; 12. a bottom slide rail;
2. moving the blackboard;
3. a top sheave assembly; 31. a top fixing plate; 32. a top pulley; 33. a first bolt;
4. a bottom sheave assembly; 41. a bottom fixing plate; 42. a bottom pulley; 43. a second bolt;
5. a drive motor; 51. a lead screw; 52. a nut block; 53. a first mounting seat; 54. a second mounting seat; 55. a connecting plate.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 7, the electric push-pull combined blackboard of this embodiment includes a fixed blackboard 1, a movable blackboard 2 and a driving mechanism, wherein a top slide rail 11 with an upward opening is disposed at the top of the fixed blackboard 1, a bottom slide rail 12 with a downward opening is disposed at the bottom of the fixed blackboard 1, a top pulley assembly 3 is disposed at the top of the movable blackboard 2, and the top pulley assembly 3 is arranged in the top slide rail 11 in a rolling manner; the bottom of the movable blackboard 2 is provided with a bottom pulley assembly 4, and the bottom pulley assembly 4 is arranged in the bottom sliding rail 12 in a rolling manner; the top interval of bottom slide rail 12 is equipped with nut piece 52, the top of bottom slide rail 12 is fixed with actuating mechanism, nut piece 52 through connecting plate 55 with bottom pulley assembly 4 connects, nut piece 52 with it is located respectively to remove blackboard 2 the front and back both sides of fixed blackboard 1, actuating mechanism's drive end pass through lead screw 51 with nut piece 52 transmission is connected and is driven nut piece 52 along bottom slide rail 12 lateral motion.
As shown in fig. 1 to 4, in a preferred embodiment of the present invention, the connection plate 55 is an inverted L-shaped structure, the connection plate 55 of the inverted L-shaped structure is fastened and fixed on the top wall and the side wall of the nut block 52, and the lower end of the connection plate 55 extends downward from one side of the bottom slide rail 12 and is connected to the bottom pulley assembly 4. Through the connecting plate that sets up type of falling L structure, can be with the upper end lock of connecting plate on nut piece upper surface and side, make the connecting plate of type of falling L structure more reliable and more stable with being connected of nut piece.
Alternatively, the connecting plate 55 may be integrally connected to the bottom pulley assembly 4, or may be connected by a connecting member such as a bolt. Fig. 4 shows a schematic structure of the connection plate integrally connected to the bottom fixing plate 41 of the bottom sheave assembly.
As shown in fig. 1 and fig. 2, a first mounting seat 53 and a second mounting seat 54 are fixed above the bottom slide rail 12 of the present embodiment, the first mounting seat 53 is fixed at the middle position of the bottom slide rail 12, the second mounting seat 54 is fixed at a position adjacent to one end of the bottom slide rail 12, and two ends of the lead screw 51 are rotatably connected to the first mounting seat 53 and the second mounting seat 54 through bearings, respectively; the driving mechanism is installed in the middle of the bottom slide rail 12, and the driving end of the driving mechanism is connected with the lead screw 51. Through setting up two mount pads, conveniently fix a position the lead screw. The driving mechanism is arranged in the middle of the bottom sliding rail, so that the movable blackboard can conveniently move horizontally between the two ends of the fixed blackboard.
As shown in fig. 4, two opposite inner sidewalls of the top slide rail 11 of the present embodiment are respectively provided with a first roller groove, and two opposite inner sidewalls of the bottom slide rail 12 are respectively provided with a second roller groove; the top pulley assembly 3 is arranged in a first roller groove of the top slide rail 11 in a rolling manner, and the bottom pulley assembly 4 is arranged in a second roller groove of the bottom slide rail 12 in a rolling manner. The first roller grooves are respectively arranged on the two opposite inner side walls of the top slide rail, the second roller grooves are respectively arranged on the two opposite inner side walls of the bottom slide rail, so that the axes of the top roller assembly and the bottom roller assembly are vertically arranged, the stress of the pulley assemblies is more uniform, and the movement of the moving blackboard is more balanced and stable.
A preferred scheme of this embodiment does, the dorsal part both ends of removal blackboard 2 are equipped with hall sensor respectively, the both ends of fixed blackboard 1 be equipped with respectively with the inductor that hall sensor corresponds, hall sensor and the inductor respectively with actuating mechanism connects. Through the arrangement of the Hall sensor and the inductor, after the movable blackboard reaches a set position, signals can be given out through the Hall sensor and the inductor, so that the driving mechanism stops running, and the movable blackboard is automatically started and stopped.
The drive mechanism of the present embodiment may employ a drive motor 5.
As shown in fig. 1, 2, and 5, a preferred embodiment of the present embodiment is that the top pulley assembly 3 of the present embodiment includes a top fixing plate 31 and a top pulley 32, one end of the top fixing plate 31 is fixed on the top of the movable blackboard 2, the other end of the top fixing plate 31 extends in a direction away from the movable blackboard 2, the top pulley 32 is installed below the other end of the top fixing plate 31, and the top pulley 32 is arranged in the first roller groove of the top slide rail 11 in a rolling manner. Through setting up the top fixed plate, can set up the top pulley in one side of removing the blackboard, conveniently set up the top pulley in the first gyro wheel inslot of top slide rail. The top fixing plate also enables stable structural support between the movable blackboard and the fixed blackboard.
Specifically, as shown in fig. 1 and 2, the top pulley 32 of the present embodiment is fixed to the top fixing plate 31 by a first bolt 33.
As shown in fig. 5, in a preferred embodiment of the present invention, the arrangement of the top pulleys 32 below the other end of the top fixing plate 31 in the present embodiment may be arbitrarily arranged, for example, one row or two rows may be provided, as long as the top pulleys 32 can be embedded or slidably connected in the first roller grooves of the top slide rail 11.
As shown in fig. 5, the number of the top pulleys 32 in each row of the present embodiment is at least two. At least two top pulleys are arranged in each row, so that the stress is dispersed, and the structural stability is good.
As shown in fig. 4 and 6, the bottom pulley assembly 4 of this embodiment includes a bottom fixing plate 41 and a bottom pulley 42, one end of the bottom fixing plate 41 is fixed at the bottom of the movable blackboard 2, the other end of the bottom fixing plate 41 extends toward a direction away from the movable blackboard 2, the bottom pulley 42 is installed above the other end of the bottom fixing plate 41, and the bottom pulley 42 is disposed in the second roller groove of the bottom slide rail 12 in a rolling manner. Through setting up the bottom fixed plate, can set up the bottom pulley in one side of removal blackboard, conveniently set up the bottom pulley in the second gyro wheel groove of bottom slide rail. The bottom fixing plate also enables stable structural support between the movable blackboard and the fixed blackboard.
Specifically, as shown in fig. 7, the bottom pulley 42 of the present embodiment is fixed to the bottom fixing plate 41 by the second bolt 43.
As shown in fig. 6, the arrangement of the bottom pulleys 42 above the other end of the bottom fixing plate 41 in the present embodiment may be arbitrarily arranged, for example, one row or two rows may be provided, as long as the bottom pulleys 42 can be embedded or slidably connected in the second roller grooves of the bottom slide rail 12.
As shown in fig. 6, the number of the bottom pulleys 42 in each row of the present embodiment is at least two. Each row is provided with at least two bottom pulleys, the stress is dispersed, and the structural stability is good.
As shown in fig. 7, at least two top pulley assemblies 3 are arranged at the top of the movable blackboard 2, and at least two bottom pulley assemblies 4 are arranged at the bottom of the movable blackboard 2. Is beneficial to the stable movement of the movable blackboard relative to the fixed blackboard.
As shown in fig. 4 to 6, the first roller groove and the second roller groove of the present embodiment are both arc-shaped structures, and the top pulley assembly 3 and the bottom pulley assembly 4 are both adapted to be installed in the corresponding first roller groove and second roller groove. The roller groove and the pulley with the circular arc structure are adopted, so that the upper and lower stress is uniform.
Specifically, as shown in fig. 1 to 7, the axes of the top pulley 32 of the top pulley assembly 3 and the bottom pulley 42 of the bottom pulley assembly 4 are both vertically arranged, the matching degree with the sliding rail where the top pulley assembly is located is high, the sliding is stable, the stress of each pulley is uniform and consistent, and the service life is long.
A preferable scheme of this embodiment is that, as shown in fig. 1 to 7, both the top slide rail 11 and the bottom slide rail 12 of this embodiment are flat, so that the appearance is more beautiful.
The electronic push-and-pull combination blackboard of this embodiment sets up the top slide rail that the opening faces upwards through the top at fixed blackboard, sets up the bottom slide rail that the opening faces down in the bottom of fixed blackboard, because the opening of bottom slide rail is arranged down, in the chalk dust can not fall into the bottom slide rail, avoids making the bottom slide rail because chalk dust accumulation is too much and takes place to block up, and then also need not clear up the bottom slide rail. The nut blocks are arranged above the bottom sliding rail at intervals, the driving mechanism can be utilized to drive the lead screw to rotate, and then the nut blocks and the movable blackboard are driven to move along the bottom sliding rail and the top sliding rail, so that the automatic movement control of the movable blackboard can be realized. The two opposite inner side walls of the top slide rail are respectively provided with the first roller groove, and the two opposite inner side walls of the bottom slide rail are respectively provided with the second roller groove, so that the axes of the top roller assembly and the bottom roller assembly are vertically arranged, the stress of the pulley assemblies is more uniform, and the movement of the moving blackboard is more balanced and stable.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. An electric push-pull combined blackboard is characterized by comprising a fixed blackboard, a movable blackboard and a driving mechanism, wherein a top sliding rail with an upward opening is arranged at the top of the fixed blackboard, a bottom sliding rail with a downward opening is arranged at the bottom of the fixed blackboard, a top pulley assembly is arranged at the top of the movable blackboard, and the top pulley assembly is arranged in the top sliding rail in a rolling manner; the bottom of the movable blackboard is provided with a bottom pulley assembly, and the bottom pulley assembly is arranged in the bottom sliding rail in a rolling manner; the top interval of bottom slide rail is equipped with the nut piece, the top of bottom slide rail is fixed with actuating mechanism, the nut piece pass through the connecting plate with bottom loose pulley assembly connects, the nut piece with it is located respectively to remove the blackboard both sides around the fixed blackboard, actuating mechanism's drive end pass through the lead screw with nut piece transmission is connected and drives the nut piece along bottom slide rail lateral motion.
2. An electric push-pull combination blackboard according to claim 1, wherein the connecting plate is of an inverted L-shaped structure, the connecting plate of the inverted L-shaped structure is fastened and fixed on the top wall and the side wall of the nut block, and the lower end of the connecting plate extends downwards from one side of the bottom slide rail and is connected with the bottom pulley assembly.
3. An electric push-pull combined blackboard according to claim 1, characterised in that a first mounting seat and a second mounting seat are fixed above the bottom slide rail, the first mounting seat is fixed at the middle position of the bottom slide rail, the second mounting seat is fixed at the position adjacent to one end of the bottom slide rail, and two ends of the lead screw are rotatably connected to the first mounting seat and the second mounting seat; the driving mechanism is installed in the middle of the bottom sliding rail, and the driving end of the driving mechanism is connected with the screw rod.
4. An electric push-pull combined blackboard according to claim 3, wherein two ends of the lead screw are respectively connected to the first mounting seat and the second mounting seat in a rotating manner through bearings.
5. An electric push-pull combination blackboard according to claim 1, wherein the top slide rail has first roller grooves on two opposite inner side walls, and the bottom slide rail has second roller grooves on two opposite inner side walls; the top pulley assembly is arranged in a first roller groove of the top sliding rail in a rolling manner, and the bottom pulley assembly is arranged in a second roller groove of the bottom sliding rail in a rolling manner.
6. An electric push-pull combined blackboard according to claim 1, wherein hall sensors are respectively provided at both ends of the back side of the moving blackboard, sensors corresponding to the hall sensors are respectively provided at both ends of the fixed blackboard, and the hall sensors and the sensors are respectively connected to the driving mechanism.
7. An electric push-pull combined blackboard according to claim 1, wherein the bottom pulley assembly includes a bottom fixing plate and a bottom pulley, one end of the bottom fixing plate is fixed at the bottom of the moving blackboard, the other end of the bottom fixing plate extends in a direction away from the moving blackboard and is fixedly connected with the connecting plate, the bottom pulley is installed above the other end of the bottom fixing plate, and the bottom pulley is arranged in the second roller groove of the bottom slide rail in a rolling manner.
8. An electric push-pull combination blackboard according to claim 7, wherein the bottom fixing plate is integrally connected with the connecting plate.
9. An electric push-pull combined blackboard according to claim 1, wherein the top pulley assembly includes a top fixing plate and a top pulley, one end of the top fixing plate is fixed on the top of the movable blackboard, the other end of the top fixing plate extends in a direction away from the movable blackboard, the top pulley is installed below the other end of the top fixing plate, and the top pulley is arranged in the first roller groove of the top sliding rail in a rolling manner.
10. An electric push-pull combination blackboard according to claim 1, wherein the driving mechanism is a driving motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221468434.0U CN217906932U (en) | 2022-06-13 | 2022-06-13 | Electric push-pull combined blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221468434.0U CN217906932U (en) | 2022-06-13 | 2022-06-13 | Electric push-pull combined blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217906932U true CN217906932U (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221468434.0U Active CN217906932U (en) | 2022-06-13 | 2022-06-13 | Electric push-pull combined blackboard |
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| Country | Link |
|---|---|
| CN (1) | CN217906932U (en) |
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2022
- 2022-06-13 CN CN202221468434.0U patent/CN217906932U/en active Active
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