CN210941067U - Blackboard - Google Patents
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- CN210941067U CN210941067U CN201920971256.5U CN201920971256U CN210941067U CN 210941067 U CN210941067 U CN 210941067U CN 201920971256 U CN201920971256 U CN 201920971256U CN 210941067 U CN210941067 U CN 210941067U
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- blackboard
- connecting rod
- moving device
- spring
- bevel gear
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Abstract
The utility model discloses a blackboard, include: a frame body on which a chute is arranged; the blackboard is embedded in the frame body, and the sliding groove is positioned on the side of the blackboard; the moving device is arranged in the sliding groove, a pressing device is arranged on the side face of the moving device opposite to the blackboard and is also connected with the blackboard eraser so as to press the blackboard eraser on the blackboard, the pressing device comprises a limiting groove arranged on the side face of the moving device opposite to the blackboard, a connecting rod connected with the blackboard eraser and a spring limited between the limiting groove and the connecting rod, and the natural extension length of the spring is greater than the distance between the end face, facing the spring, of the connecting rod and the bottom face of the limiting groove; and the driving device is connected with the moving device through a transmission device, and the driving device works to drive the transmission device to rotate so as to drive the moving device to move, so that the blackboard eraser on the driving device moves along the length direction of the blackboard to erase the blackboard. The utility model discloses can avoid the chalk dust to be wiped in the blackboard person inhales the respiratory track, and wipe efficiently.
Description
Technical Field
The utility model relates to a technical field of educational aid especially relates to a blackboard.
Background
In schools, the derivation processes of mathematical, physical and chemical formulas and the like are difficult to demonstrate by multimedia, and most teachers write and deduce by chalk on a blackboard. At present, the efficiency of manually erasing the blackboard is low, chalk powder flies upward, and the health of teachers is greatly damaged. Especially for teaching that requires a large number of blackboard-writing.
At present, most of blackboards are manually erased, the chalk is easily sucked into the respiratory tract by a user in the erasing process, the body is damaged, and the erasing efficiency is not high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blackboard to solve among the prior art blackboard mostly the manual work and erase, erase in-process chalk and easily inhale the respiratory track by the user, cause the harm to the health, and the problem that the efficiency is not high of erasing.
The utility model discloses a following technical scheme realizes:
a blackboard, comprising:
the frame body is provided with a sliding groove along the length direction;
the blackboard is embedded in the frame body, and the sliding groove is positioned on the side of the blackboard;
the moving device is arranged in the sliding groove, a pressing device is arranged on the side face of the moving device opposite to the blackboard, the pressing device is further connected with a blackboard eraser to press the blackboard eraser on the blackboard in a propping manner, the pressing device comprises a limiting groove arranged on the side face of the moving device opposite to the blackboard, a connecting rod connected with the blackboard eraser and a spring limited between the limiting groove and the connecting rod, and the natural extension length of the spring is greater than the distance between the end face, facing the spring, of the connecting rod and the bottom face of the limiting groove; and
the driving device is connected with the moving device through a transmission device, the driving device works to drive the transmission device to rotate, and the transmission device rotates to drive the moving device to move and drive the blackboard eraser on the moving device to move along the length direction of the blackboard to erase the blackboard.
Further, the moving device comprises a screw rod arranged in the sliding groove along the length direction of the blackboard, a sliding block in threaded connection with the screw rod, and a moving plate arranged on the sliding block, wherein the limiting groove is formed in the side face, opposite to the blackboard, of the moving plate.
Furthermore, the limiting groove comprises a notch part close to the blackboard eraser and a deep part connected with the notch part, the end side of the connecting rod departing from the blackboard eraser penetrates through the notch part and extends into the deep part, an anti-falling block used for limiting the end side in the deep part is arranged on the end side of the connecting rod departing from the blackboard eraser, and the anti-falling block is further connected with one end of the spring.
Further, the driving device comprises a motor, the transmission device comprises a first bevel gear and a second bevel gear, the first bevel gear is sleeved on an output shaft of the motor, the second bevel gear is sleeved on the end side, close to the motor, of the screw rod, and the first bevel gear and the second bevel gear are in meshing transmission.
Furthermore, a switch button is arranged on the frame body and connected with the driving device through a circuit.
Furthermore, a fixing block for fixing the frame body is arranged on the frame body, and a through hole for arranging a fastener is formed in the fixing block.
Compared with the prior art, the utility model discloses following beneficial effect has at least: the utility model discloses a motor, transmission drive two lead screws and rotate, and the slider that passes through threaded connection with the lead screw is linear motion on the lead screw and then drives the blackboard eraser that is connected with the movable block through closing device and moves from one side of blackboard to the opposite side, and the blackboard eraser erases the chalk blackboard writing on the blackboard in the process of moving, and this process erasing efficiency is high, and need not artifical the erasing completely, just also make the chalk dust be difficult for the person who erases the blackboard to inhale in the respiratory track, consequently reduced the injury of chalk dust to the people's health; the utility model discloses still set up closing device, thereby this closing device's spring is in compression state all the time and supports the blackboard eraser closely on the blackboard for the blackboard eraser is then to the chalk blackboard writing on the blackboard erase ground clean more and the efficiency of erasing higher.
Drawings
FIG. 1 is a schematic structural view of a blackboard according to an embodiment of the present invention;
FIG. 2 is a left side view of the moving plate of FIG. 1;
fig. 3 is a partially enlarged view of a portion a in fig. 2.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
In view of among the prior art blackboard mostly is the manual work to erase, erase in-process chalk easily by the user in the respiratory track of inhaling, cause the harm to the health to the problem that the efficiency of erasing is not high, as shown in fig. 1, the utility model provides a blackboard, including framework 1, blackboard 2, mobile device, closing device, blackboard eraser 3 and drive arrangement. The frame body 1 is a rectangular body, four corners of the frame body are respectively provided with a fixed block 4, the four fixed blocks 4 are respectively provided with a through hole 5, and when the frame body is used, a screw fixing fastener penetrates through the through holes 5 to fix the frame body 1 on a wall body. The upper part and the lower part of the frame body 1 are both provided with a sliding chute 6 along the length direction, and the two sliding chutes 6 are oppositely arranged. The blackboard 2 is embedded in the frame body 1 and is positioned between the two sliding grooves 6. The moving device comprises two screw rods 7 respectively arranged in two sliding grooves, a slide block 8 in threaded connection with each screw rod 7 and a moving plate 9 connected with the two slide blocks 8. Referring to fig. 2, a pressing device is arranged on the side surface of the moving plate 9 opposite to the blackboard 2, and the pressing device is also connected with the blackboard eraser 3 and used for pressing the blackboard eraser 3 against the blackboard 2. Specifically, as shown in fig. 3, the pressing means includes a stopper groove 10 provided on the side of the moving plate 9 opposite to the blackboard 2, a spring 11 having one end connected to the bottom of the stopper groove 10, and a connecting rod 12 connected to the other end of the spring 11. The end face of the connecting rod 12 facing away from the spring 11 is also connected to the blackboard eraser 3. In order to better press the blackboard eraser 3 against the blackboard 2, the natural extension length of the spring 11 is greater than the distance between the bottom surface of the limit groove 10 and the end surface of the connecting rod 12 facing the spring 11, i.e. the spring 11 in the pressing device is in a compressed state. Thus, under normal conditions, due to the elastic restoring force of the spring 11, the spring 11 pushes the connecting rod 12 to further push the blackboard eraser 3, so that the blackboard eraser 3 is tightly pressed on the blackboard 2. Therefore, when the blackboard eraser 3 is moved, the blackboard eraser 3 can more effectively and more thoroughly erase chalk characters on the blackboard 2.
For a better pressing effect, a retaining block 13 which can limit the end of the connecting rod 12 in the limiting groove 10 can also be arranged on the end side of the connecting rod 12 facing the spring 11. Specifically, the stopper groove 10 includes a notch portion 10a close to the blackboard eraser 3 and a deep portion 10b connected to the notch portion 10a, and a sectional size of the notch portion 10a is smaller than a sectional size of the deep portion 10b, the connecting rod 12 protrudes into the deep portion 10b through the groove 10a toward the end side of the spring 10, and the end side of the connecting rod 12 located in the deep portion 10b is provided with a coming-off prevention block 13, and the sectional size of the coming-off prevention block 13 is larger than the sectional size of the notch portion 10a and smaller than the sectional size of the deep portion 10b, thereby stopping the connecting rod 12 in the deep portion 10b toward the end of the spring 11. In addition, the anti-drop block 13 is connected to the other end of the spring 11, so as to limit the spring 11 in the limiting groove 10. Therefore, the structural design can effectively prevent the connecting rod 12 from being disengaged from the limiting groove 10, so that the spring fails to work and the effect of pressing the blackboard eraser 3 is lost.
The driving device comprises a motor 14, the motor 14 can be arranged on the side of the frame 1 and arranged along the height direction of the frame 1, the motor 14 comprises two motor output shafts 15 extending towards two ends, a first bevel gear 16 is sleeved on each motor output shaft 15, a second bevel gear 17 is sleeved on the end side of the screw rod 7 close to the motor 14, and the first bevel gear 16 and the second bevel gear 17 are in meshing transmission. In order to control the blackboard eraser 3 to automatically erase the blackboard 2, a switch button 18 is further arranged on the frame body 1, and the switch button 18 is connected with the motor 14 through a circuit.
When the blackboard 2 needs to be wiped, the switch button 18 is closed, the motor 14 works, the motor output shaft 15 drives the first bevel gear 16 on the motor output shaft to rotate, the first bevel gear 16 drives the second bevel gear 17 to rotate, the screw rod 7 is further driven to rotate, the sliding block 8 which is connected with the screw rod 7 through threads moves linearly on the screw rod 7, the blackboard eraser 3 which is connected with the moving plate 9 through the pressing device is further driven to move from one side of the blackboard 2 to the other side, and the blackboard 2 is wiped in the moving process of the blackboard eraser 3. When the blackboard eraser 3 moves to the other side of the blackboard 2 and the blackboard 2 needs to be erased, the output shaft 15 of the motor is controlled to rotate reversely. The process has high erasing efficiency, and manual erasing is completely not needed, so that the chalk dust is not easy to be sucked into the respiratory tract by a blackboard eraser, and the harm of the chalk dust to the human body is reduced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood that the invention is not limited thereto, and that various modifications and changes can be made by those skilled in the art without departing from the principles of the invention.
Claims (6)
1. A blackboard, characterized in that it comprises:
the frame body is provided with a sliding groove along the length direction;
the blackboard is embedded in the frame body, and the sliding groove is positioned on the side of the blackboard;
the moving device is arranged in the sliding groove, a pressing device is arranged on the side face of the moving device opposite to the blackboard, the pressing device is further connected with a blackboard eraser to press the blackboard eraser on the blackboard in a propping manner, the pressing device comprises a limiting groove arranged on the side face of the moving device opposite to the blackboard, a connecting rod connected with the blackboard eraser and a spring limited between the limiting groove and the connecting rod, and the natural extension length of the spring is greater than the distance between the end face, facing the spring, of the connecting rod and the bottom face of the limiting groove; and
the driving device is connected with the moving device through a transmission device, the driving device works to drive the transmission device to rotate, and the transmission device rotates to drive the moving device to move and drive the blackboard eraser on the moving device to move along the length direction of the blackboard to erase the blackboard.
2. The blackboard according to claim 1, wherein the moving device includes a screw rod disposed in the sliding groove along the length direction of the blackboard, a slider connected with the screw rod through a thread, and a moving plate disposed on the slider, and the limiting groove is disposed on the side of the moving plate opposite to the blackboard.
3. The blackboard according to claim 1, wherein the limiting groove includes a notch portion close to the blackboard eraser and a penetrating portion connected with the notch portion, an end side of the connecting rod facing away from the blackboard eraser penetrates through the notch portion to extend into the penetrating portion, an end side of the connecting rod facing away from the blackboard eraser is provided with an anti-falling block for limiting the end side in the penetrating portion, and the anti-falling block is further connected with one end of the spring.
4. The blackboard according to claim 2, characterised in that the driving means includes a motor, the transmission means includes a first bevel gear and a second bevel gear, the first bevel gear is sleeved on the output shaft of the motor, the second bevel gear is sleeved on the end side of the screw rod close to the motor, and the first bevel gear and the second bevel gear are in mesh transmission.
5. The blackboard according to claim 1, characterised in that the frame is provided with a switch button, which is connected to the drive means by a circuit.
6. The blackboard according to claim 1, characterized in that the frame is provided with a fixing block for fixing the frame, and the fixing block is provided with a through hole for arranging a fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920971256.5U CN210941067U (en) | 2019-06-26 | 2019-06-26 | Blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920971256.5U CN210941067U (en) | 2019-06-26 | 2019-06-26 | Blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210941067U true CN210941067U (en) | 2020-07-07 |
Family
ID=71394101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920971256.5U Active CN210941067U (en) | 2019-06-26 | 2019-06-26 | Blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210941067U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771130A (en) * | 2022-05-05 | 2022-07-22 | 威海海洋职业学院 | Blackboard is used in teaching with automatically, clean function |
-
2019
- 2019-06-26 CN CN201920971256.5U patent/CN210941067U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771130A (en) * | 2022-05-05 | 2022-07-22 | 威海海洋职业学院 | Blackboard is used in teaching with automatically, clean function |
| CN114771130B (en) * | 2022-05-05 | 2023-08-25 | 威海海洋职业学院 | Blackboard with automatic wiping function for teaching |
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