阅读说明：本技术 一种可快速擦除字迹的黑板 (Blackboard capable of quickly erasing handwriting ) 是由 吴世平 周煜淇 王梦阳 于 2021-09-15 设计创作，主要内容包括：一种可快速擦除字迹的黑板,包括黑板本体,所述黑板本体为环形带状结构,所述黑板本体的上部与第一转动机构连接,所述黑板本体的下部与第二转动机构连接,所述第一转动机构包括相互啮合的第一转动轮和第一转动轴,所述第二转动机构包括相互啮合的第二转动轮和第二转动轴,所述黑板本体安装在第一转动轮和第二转动轮的表面,所述黑板本体的背面上部设有擦板,所述擦板的宽度大于黑板本体的宽度,所述擦板的无毛面通过可伸缩机构固定在墙体上,所述擦板的带毛面与黑板本体相接触。本发明中的被擦除完字迹的黑板继续转动至正面后,便可以继续进行书写。(The utility model provides a can erase blackboard of writing fast, includes the blackboard body, the blackboard body is annular band structure, the upper portion and the first rotation axis of blackboard body are connected, the lower part and the second rotation axis of blackboard body are connected, first rotation axis includes intermeshing's first rotation wheel and first rotation axis, second rotation axis includes intermeshing's second rotation wheel and second rotation axis, the blackboard body is installed and is rotated the surface of wheel at first rotation wheel and second, the back upper portion of blackboard body is equipped with the board of wiping, the width of wiping the board is greater than the width of blackboard body, the no hair face of wiping the board passes through telescopic machanism and fixes on the wall body, the area hair face of wiping the board contacts with the blackboard body. The blackboard with the erased writing can continue to write after continuing to rotate to the front.)

1. The utility model provides a blackboard that can erase writing fast, includes blackboard body, its characterized in that: the blackboard body is annular band structure, the upper portion and the first rotation mechanism of blackboard body are connected, the lower part and the second rotation mechanism of blackboard body are connected, first rotation mechanism includes intermeshing's first rotation wheel and first axis of rotation, second rotation mechanism includes intermeshing's second rotation wheel and second axis of rotation, the blackboard body is installed on the surface that first rotation wheel and second rotated the wheel, the back upper portion of blackboard body is equipped with the board of wiping, the width of wiping the board is greater than the width of blackboard body, the hairless face of wiping the board passes through telescopic machanism and fixes on the wall body, the hairless face of wiping the board contacts with the blackboard body.

2. A blackboard capable of being erased quickly according to claim 1, characterised in that: the central axes of the first rotating wheel and the second rotating wheel are positioned on the same straight line.

3. A blackboard capable of being erased quickly according to claim 1 or 2, characterised in that: the telescopic mechanism is a hydraulic cylinder.

4. A blackboard capable of being erased quickly according to claim 1 or 2, characterised in that: the first rotating shaft and the second rotating shaft are connected with the driving motor, a first switch is arranged on the wall body on one side of the blackboard body, and the first switch is electrically connected with the driving motor.

5. A blackboard capable of being erased quickly according to claim 3, characterised in that: the first rotating shaft and the second rotating shaft are connected with the driving motor, a first switch is arranged on the wall body on one side of the blackboard body, and the first switch is electrically connected with the driving motor.

6. A blackboard capable of being erased quickly according to claim 5, characterized in that: and a second switch is arranged on the wall body and is electrically connected with the hydraulic cylinder.

Technical Field

The invention relates to a teaching aid, in particular to a blackboard capable of quickly erasing handwriting.

Background

The blackboard is an important teaching tool, although the current multimedia teaching is widely applied, in the practical teaching practice, no matter a primary and secondary school teacher or a university professor, the traditional teaching mode is still the main mode, and in the traditional teaching mode, a teacher generally writes teaching contents on the blackboard, and the teacher needs to continuously write on the blackboard and then continuously manually erase the teaching contents, so that the classroom time is wasted in the manual erasing process.

CN201520022814.5 discloses a blackboard capable of automatically removing handwriting, which comprises a sheet frame and a sheet body fixed in the sheet frame, wherein slide bars parallel to the horizontal plane are fixed above and below the sheet frame, an erasing plate capable of swinging left and right along the slide bars is arranged between the two slide bars, a motor is fixed on the erasing plate, a driving shaft is arranged on the motor, a driving gear is fixed on the driving shaft, a plurality of rotating shafts perpendicular to the erasing plate are arranged on the erasing plate along the length direction, a transmission gear is fixed at the top of the rotating shafts, a brush is fixed at the bottom of the rotating shafts, the bottom of the brush is attached to the sheet body, a cylinder is fixed at one side of the sheet frame, a mandril is arranged on the cylinder, and the top end of the mandril is fixedly connected with the erasing plate, this patent uses cylinder power to realize promoting to erase the pole, makes the device volume increase, has certain clearance between brush and the brush in addition, probably makes to erase unclean.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects in the prior art and provide a blackboard which has better erasing effect and can be quickly erased.

The invention solves the technical problem by adopting the technical scheme that the blackboard capable of quickly erasing the handwriting comprises a blackboard body, wherein the blackboard body is of an annular belt-shaped structure, the upper part of the blackboard body is connected with a first rotating mechanism, the lower part of the blackboard body is connected with a second rotating mechanism, the first rotating mechanism comprises a first rotating wheel and a first rotating shaft which are mutually meshed, the second rotating mechanism comprises a second rotating wheel and a second rotating shaft which are mutually meshed, the blackboard body is arranged on the surfaces of the first rotating wheel and the second rotating wheel, the upper part of the back surface of the blackboard body is provided with an erasing plate, the width of the erasing plate is larger than that of the blackboard body, the hairless surface of the erasing plate is fixed on a wall body through a telescopic mechanism, and the hairless surface of the erasing plate is in contact with the blackboard body.

Furthermore, the central axes of the first rotating wheel and the second rotating wheel are positioned on the same straight line.

Further, the telescopic mechanism is a hydraulic cylinder.

Further, the first rotating shaft and the second rotating shaft are connected with a driving motor, a first switch is arranged on a wall body on one side of the blackboard body, and the first switch is electrically connected with the driving motor.

Furthermore, a second switch is arranged on the wall body and electrically connected with the hydraulic cylinder.

The blackboard body is driven by the rotating shaft, when the blackboard body on the back rotates from bottom to top, the hydraulic cylinder extends out when the blackboard body at the second rotating wheel moves to the first rotating wheel, the erasing plate can tightly abut against the blackboard body, and the handwriting on the blackboard is erased by utilizing larger friction force between the erasing plate and the blackboard body. The blackboard after erasing the writing can continue to write after continuing to rotate to the front.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the connection of the hydraulic cylinder and the wiper plate in the embodiment of FIG. 1;

FIG. 3 is a schematic view showing the rotation principle of the blackboard body in the embodiment shown in FIG. 1.

In the figure: 1. the blackboard comprises a blackboard body, 2, a first rotating wheel, 3, a first rotating shaft, 4, a second rotating wheel, 5, a second rotating shaft, 6, a wiping plate, 7 and a hydraulic cylinder.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in fig. 1-3, this embodiment includes blackboard body 1, blackboard body 1 is annular band structure, blackboard body 1's upper portion is connected with first slewing mechanism, blackboard body's lower part is connected with second slewing mechanism, first slewing mechanism includes intermeshing's first runner 2 and first axis of rotation 3, second slewing mechanism includes intermeshing's second runner 4 and second axis of rotation 5, blackboard body 1 installs on the surface of first runner 2 and second runner 4, blackboard body 1's back upper portion is equipped with erasing plate 6, erasing plate 6's width is greater than blackboard body 1's width, erasing plate 6's hairless face passes through pneumatic cylinder 7 to be fixed on the wall body, erasing plate 6's the area of taking the hair contacts with blackboard body 1.

In this embodiment, the central axes of the first rotating wheel 2 and the second rotating wheel 4 are located on the same straight line. Thus, the blackboard body 1 can be kept vertical, and can better rotate and erase the handwriting.

In this embodiment, the telescopic end of the hydraulic cylinder 7 is connected to the wiper plate 6, and the other end is fixed to the wall. When the hydraulic cylinder 7 extends out, the erasing plate 6 can be tightly propped against the blackboard body 1, so that the handwriting can be erased by utilizing the friction force between the erasing plate 6 and the blackboard body 1, and the overlarge friction force between the erasing plate 6 and the blackboard body 1 can be avoided by adjusting the extending length of the hydraulic cylinder 7.

In this embodiment, the first rotating shaft 3 and the second rotating shaft 5 are connected to a driving motor, and a first switch is disposed on a wall on one side of the blackboard body 1 and electrically connected to the driving motor. Under the drive of a driving motor, the first rotating shaft 3 and the second rotating shaft 5 are driven to rotate, the first rotating shaft 3 drives the first rotating wheel 2 to rotate, and the second rotating shaft 5 and the second rotating wheel 4 rotate, so that the edge of the blackboard body 1 with the handwriting can be gradually rotated to be in contact with the erasing plate 6, and the blackboard body is erased by the erasing plate 6 and then becomes a clean blackboard surface.

The wall body on one side of the blackboard body 1 is also provided with a second switch which is electrically connected with the hydraulic cylinder and can be used for starting the hydraulic cylinder 7 and adjusting the extension length of the hydraulic cylinder 7, thereby adjusting the friction force between the eraser plate 6 and the blackboard body 1.

The working process of the invention is as follows: pressing down first switch and second switch, under driving motor's drive, drive first axis of rotation 3 and second axis of rotation 5 and rotate, first axis of rotation 3 drives first rotation wheel 2 and rotates, second axis of rotation 5 rotates wheel 4 with the second, because the diameter that second rotates wheel 4 is greater than the diameter of first rotation wheel 2, when blackboard body 1 at the back rotates from bottom to top, blackboard body 1 that second rotation wheel 4 department is when moving to first rotation wheel 2, pneumatic cylinder 7 stretches out, utilize to wipe the writing on the blackboard of great frictional force between 6 and the blackboard body of board. The blackboard after erasing the writing can continue to write after continuing to rotate to the front.

Various modifications and variations of the present invention may be made by those skilled in the art, and they are also within the scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.