CN210591138U

CN210591138U - Novel bipolar magnetic blackboard

Info

Publication number: CN210591138U
Application number: CN201921510449.7U
Authority: CN
Inventors: 金浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-05-22
Anticipated expiration: 2029-09-11

Abstract

The utility model discloses a novel bipolar magnetic force blackboard, including plastics blackboard, magnetic force chalk and magnetic force blackboard eraser, the plastics blackboard on evenly be provided with the closed blank, the closed blank in be provided with the magnet piece, the magnetic force chalk constitute by plastics pen-holder and magnet nib, the magnetic force blackboard eraser is by plastic casing and magnet bottom, the magnet nib with the relative tip magnetic pole of magnet piece is different, the magnet bottom with the relative tip magnetic pole of magnet piece is the same. Compared with the prior art, the utility model the advantage lie in: the utility model provides a write and clean convenient novel bipolar magnetic force blackboard, in the use, can reduce the chalk to the harm of teacher's hand, reduce the dust that the chalk left after writing to the harm of teacher and student's health, protection classroom sanitation improves reuse rate, to school, has changed into disposable expenditure with an expenditure that all needs every year, has reduced the expenditure of school.

Description

Novel bipolar magnetic blackboard

Technical Field

The utility model relates to an education utensil technical field specifically indicates a novel bipolar magnetic force blackboard.

Background

In daily teaching, any teacher needs to write and draw on the blackboard for explanation. The chalk is erased and written for several times in a class of 45-50 minutes, and a layer of white chalk dust is usually left on hands, sleeves, hair and shoulders when the chalk is used for class. Every day, every year, after working for 20-30 years, tens of thousands of chalks are worn, and some chalk dust is inevitably sucked from nostrils. Research shows that the working environment is very similar to the dust damage degree of workers in front of the steelmaking furnace in a diameter space of 3m of a platform by using the traditional chalk.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem mentioned in the background art and providing a novel bipolar magnetic blackboard.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides a novel bipolar magnetic force blackboard, includes plastics blackboard, magnetic force chalk and magnetic force blackboard eraser, the plastics blackboard on evenly be provided with the sealed blank, the sealed blank in be provided with the magnet piece, the magnetic force chalk constitute by plastics pen-holder and magnet nib, the magnetic force blackboard eraser is by plastic casing and magnet bottom, the magnet nib with the tip magnetic pole that the magnet piece is relative is different, the magnet bottom with the tip magnetic pole that the magnet piece is relative is the same.

Preferably, the shape of the closed blank is a regular hexagon.

Compared with the prior art, the utility model the advantage lie in: the utility model provides a write and clean convenient novel bipolar magnetic force blackboard, in the use, can reduce the chalk to the harm of teacher's hand, reduce the dust that the chalk left after writing to the harm of teacher and student's health, protection classroom sanitation improves reuse rate, to school, has changed into disposable expenditure with an expenditure that all needs every year, has reduced the expenditure of school.

Drawings

Fig. 1 is a schematic front structural view of the plastic blackboard of the present invention.

Fig. 2 is a schematic view of the use of the magnetic chalk.

FIG. 3 is a schematic view of the use of the magnetic eraser.

As shown in the figure: 1. the blackboard comprises a plastic blackboard, 2 magnetic chalk, 3 magnetic blackboard eraser, 4 closed space, 5 magnet block, 201 plastic pen holder, 202 magnet pen point, 301 plastic shell, 302 magnet bottom.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Combine accompanying figure 1-3, a novel bipolar magnetic force blackboard, including plastics blackboard 1, magnetic force chalk 2 and magnetic force blackboard eraser 3, plastics blackboard 1 on evenly be provided with closed blank 4, closed blank 4 in be provided with magnet piece 5, magnetic force chalk 2 constitute by plastics pen-holder 201 and magnet nib 202, magnetic force blackboard eraser 3 is by plastic casing 301 and magnet bottom 302, magnet nib 202 with the relative tip magnetic pole of magnet piece 5 is different, magnet bottom 302 with the relative tip magnetic pole of magnet piece 5 is the same.

Preferably, the shape of the closed blank 4 is a regular hexagon.

The utility model discloses a theory of operation: as shown in fig. 2, a schematic view of the use of the magnetic chalk is shown, when the magnet at the front end of the magnetic chalk is close to the plastic blackboard, the magnetic poles of the end portions of the magnet nib opposite to the magnet block are different, so that the magnet block inside the closed space is attracted to slide to the right by the mutual attraction between the magnets, and after the magnetic powder is stroked, the magnet block inside the closed space is kept still by the action of gravity. When the magnet block is kept still at the right side, the surface of the plastic blackboard can display colors, so that the writing effect is achieved. As shown in fig. 3, which is a schematic view of the use of the magnetic eraser, when the magnetic eraser is close to the closed space, because the bottom of the magnet of the magnetic eraser has the same magnetic pole as the end part opposite to the magnet block, the magnet block in the closed space moves leftwards due to the mutual repulsion between the magnets, and then returns to the shape of fig. 2, thereby achieving the effect of erasing the written trace.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a novel bipolar magnetic force blackboard which characterized in that: the magnetic blackboard eraser comprises a plastic blackboard, a magnetic chalk and a magnetic eraser, wherein the plastic blackboard is uniformly provided with closed blank spaces, magnet blocks are arranged in the closed blank spaces, the magnetic chalk comprises a plastic pen holder and a magnet pen point, the magnetic eraser comprises a plastic shell and a magnet bottom, the magnet pen point is different from the magnetic poles of the opposite end parts of the magnet blocks, and the magnetic poles of the opposite end parts of the magnet bottom and the magnet blocks are the same.

2. The novel bipolar magnetic blackboard of claim 1, wherein: the shape of the closed blank is regular hexagon.