CN212979664U

CN212979664U - Dustless polychrome magnetism blackboard that can freely erase

Info

Publication number: CN212979664U
Application number: CN202020947598.6U
Authority: CN
Inventors: 李明辉; 史家臣
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-04-16
Anticipated expiration: 2030-05-29

Abstract

A dust-free multi-color magnetic blackboard capable of being erased freely comprises a writing board, wherein the writing board is composed of a plurality of tightly arranged miniature sealed cavities, each miniature sealed cavity is composed of a transparent magnetic board and a transparent nonmagnetic board, and the magnetic boards form a board-shaped writing surface due to the tight arrangement of the miniature sealed cavities. Besides the magnetic plate used for forming the writing surface, other cavity walls of the micro-sealed cavity are all composed of non-magnetic plates. And magnetic powder is packaged in the miniature sealing cavity and is magnetically attracted with the magnetic plate. The back of the writing surface is provided with a curtain, and visual contrast exists between the curtain and the magnetic powder packaged in the miniature sealing cavity. Compared with the traditional blackboard, the blackboard has no reflection, no dust and resource saving. Is an ideal teaching aid.

Description

Dustless polychrome magnetism blackboard that can freely erase

Technical Field

The invention relates to teaching articles, in particular to a dust-free multicolor magnetic blackboard capable of being erased freely.

Background

At present, most of blackboards used by students in class use chalks to write on the blackboards. A large amount of dust is generated in the writing and erasing processes, and the dust is sucked into human bodies to influence the bodies of teachers and students.

Disclosure of Invention

In order to solve the problem of a large amount of dust generated by the blackboard in the using process, the utility model provides a principle of utilizing the same magnetic poles to repel each other and utilizing different magnetic poles to attract each other. The black magnetic powder is adsorbed on the surface of a transparent magnetic plate uniformly, and when a magnetic pen point with the same magnetism as the magnetic powder moves on the other surface of the magnetic plate, the black magnetic powder layer can be cut, the back screen can be exposed, and the purpose of writing patterns or characters can be achieved. When the color characters need to be written, the color characters can be converted into curtains with other colors by shaking a rocker beside the blackboard.

The utility model provides a technical scheme that its technical problem adopted is:

a dust-free multicolor magnetic blackboard capable of being erased freely comprises a writing board, wherein the writing board is composed of a plurality of tightly arranged micro sealed cavities, each micro sealed cavity is composed of a transparent magnetic board and a transparent nonmagnetic board, and the plurality of micro sealed cavities are tightly arranged to enable the magnetic boards to form a board-shaped writing surface; except the magnetic plate used for forming the writing surface, other cavity walls of the miniature sealed cavity are all composed of non-magnetic plates; magnetic powder is packaged in the miniature sealing cavity and is magnetically attracted with the magnetic plate; the back of the writing surface is provided with a curtain, and visual contrast exists between the curtain and the magnetic powder packaged in the miniature sealing cavity.

Furthermore, the back of the writing surface is provided with a driving roller and a driven roller, the curtain is connected end to end between the driving roller and the driven roller to form circulation, and when the driving roller rotates, the driving roller drives the curtain to rotate around the driving roller and the driven roller.

Furthermore, the rotating shaft of the driving roller is fixedly connected with the rocker.

Furthermore, a reduction magnetic stripe is arranged on the curtain and is repelled with the magnetism of the magnetic powder; when the curtain rotates along with the driving roller and the reduction magnetic strip passes through the back of the writing surface, the magnetic powder is adsorbed on the magnetic plate again through the magnetism of the reduction magnetic strip and the repulsion of the magnetic powder.

Furthermore, the blackboard is provided with a magnetic pen, one end of the magnetic pen is provided with a magnetic pen point, and the magnetism of the magnetic pen point and the magnetism of the magnetic powder repel each other.

Furthermore, the blackboard is provided with a magnetic eraser, one surface of the magnetic eraser is provided with a magnetic eraser head, and the magnetism of the magnetic eraser head is attracted with the magnetism of the magnetic powder.

Furthermore, the micro sealed cavity is of a hexagonal prism structure, and a plurality of micro sealed cavities with the hexagonal prism structure are tightly arranged to form the writing board of the blackboard.

It should be noted that the magnetic powder of the present invention is for better understanding of the concept of the present invention, and it is not necessary that the component has a powder form, and when the encapsulated magnet has a certain volume but does not affect the visual experience, the magnetic powder of particles, flakes, spheres, hemispheres, etc. can be used as the magnetic powder.

The utility model has the advantages that:

when the blackboard is used, the magnetic powder in the hexagonal closed hole can be uniformly adsorbed on the transparent magnetic plate on the first layer to form the blackboard due to the attraction of the magnetic powder and the magnetism of the magnetic plate. When needing to write, the writing pen with the magnetic head is taken up to be scratched on the blackboard, and the magnetic powder is driven to move when the writing pen with the magnetic head scratches on the blackboard due to the fact that the magnetism of the magnetic head is attracted to the transparent plate and repelled with the magnetic powder, and the screen behind the magnetic powder is displayed. The curtain is uniformly divided into three color areas, so that patterns or characters with colors can be seen when the transparent magnetic plate is seen. When other color characters need to be written, the rocking bar can be rotated to convert the curtain into other colors. When characters on the blackboard need to be erased, the magnetic blackboard eraser is taken up, and the magnetism of the blackboard eraser is attracted with magnetic powder and is greater than that of the magnetic plate. Therefore, when the blackboard eraser is close to the blackboard, the magnetic powder can be attracted. When the blackboard eraser is used for erasing a blackboard, the magnetic powder can be uniformly adsorbed on the magnetic plate under the action of magnetic force, so that the blackboard restores to a black mode, and the erasing effect is achieved.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic diagram of a blackboard;

FIG. 3 is a simplified diagram of a blackboard

FIG. 4 is a schematic structural diagram of a writing pen;

FIG. 5 is a schematic view of a blackboard eraser;

FIG. 6 is a schematic view of example 2.

In the figure: 1. the magnetic pen comprises a writing board, 2 a curtain, 3 a driven roller, 4 a driving roller, 5 magnetic powder, 6 a miniature sealed cavity, 7 a transparent magnetic board, 8 a cavity, 9 a transparent nonmagnetic board, 10 a rocker, 11 a magnetic pen, 12 a magnetic pen point, 13 a magnetic eraser, 14 a magnetic eraser head and 15 a reduction magnetic strip.

Detailed Description

The invention is further explained below with reference to the drawings and examples.

First embodiment

The utility model aims at providing a normal condition is dark for utilizing the magnetic, and the orbit after only writing shows for the light color, and visual effect more approaches the magnetic blackboard of current blackboard.

In order to achieve the above object, the utility model adopts the following scheme:

referring to fig. 1-3, a dust-free multi-color magnetic blackboard capable of being freely erased comprises a writing board 1, wherein the writing board 1 is composed of a plurality of micro sealed cavities 6 which are closely arranged, and the micro sealed cavities 6 are composed of transparent magnetic plates 7 and transparent non-magnetic plates 9. The micro-sealed chambers 6 are closely arranged so that the magnetic plate forms a plate-shaped writing surface, i.e. the outer surface of the writing plate 1, which is also the outer surface directly used for visual display.

The other chamber walls of the micro-sealed chamber 6, except for the magnetic plate 7 for constituting the writing surface, are composed of a non-magnetic plate 9. In other words, the magnetic powder 5 only magnetically interacts with the magnetic plate 7 forming the outer surface of the writing board 1, and does not magnetically interact with the side wall of the micro seal chamber 6, the backplate, and the like.

And magnetic powder 5 is packaged in the miniature sealed cavity 6, and the magnetic powder 5 and the magnetic plate 7 are magnetically attracted. Therefore, when no external force acts, the magnetic powder 5 can be automatically adsorbed on the surface of the magnetic plate 7, and at the moment, the magnetic powder 5 forms an opaque magnetic powder layer on the display surface of the writing board 1, which is visually represented as the color of the magnetic powder 5.

The back of the show surface of clipboard 1 is equipped with curtain 2, and this curtain 2 has visual contrast with the magnetic 5 of miniature sealed intracavity 6 internal encapsulation, and when magnetic 5 did not adsorb in the 7 surfaces of magnetic plate, the show surface of clipboard 1 appeared for transparent magnetic plate 7, and then appeared the colour that has of curtain 2 at clipboard 1 back in the vision.

Based on the principle, in order to realize the functions of writing, erasing and the like of the blackboard, the corresponding magnetic pen 11 and the magnetic eraser 13 are designed in a matched mode. The magnetic pen 11 and the magnetic eraser 13 may be regarded as a part of the blackboard of the present invention, and the three components may be independent from each other. For example, the magnetic pen 11 and the magnetic eraser 13 may be connected to the blackboard by a flexible connection or the like, or may not be connected. Whether the magnetic pen 11 and the magnetic eraser 13 are connected with the blackboard or not has no influence on the realization of the purpose of the utility model, and therefore, the description is omitted here.

One end of the magnetic pen 11 is provided with a magnetic pen point 12, and the magnetism of the magnetic pen point 12 and the magnetism of the magnetic powder 5 repel each other. Specifically, the magnetic relationship between the magnetic pen point 12 and the magnetic powder 5 should be satisfied, when the magnetic pen point 12 is scratched on the surface of the transparent magnetic plate 7, the magnetic force of the magnetic pen point 12 should be enough to separate the magnetic powder 5 on the reverse side of the transparent magnetic plate 7 from the adsorption of the transparent magnetic plate 7.

The magnetic eraser 13 is characterized in that one surface of the magnetic eraser 13 is provided with a magnetic eraser head 14, and the magnetism of the magnetic eraser head 14 is attracted with the magnetism of the magnetic powder 5. Specifically, the magnetic relationship between the magnetic head 14 and the magnetic powder 5 should be satisfied, when the magnetic head 14 wipes the surface of the transparent magnetic plate 7, the magnetic force of the magnetic head 14 and the transparent magnetic plate 7 should be enough to make the magnetic powder 5 on the opposite side of the transparent magnetic plate 7 be re-adsorbed on the surface of the transparent magnetic plate 7.

In addition, in order to optimize the structure of the micro-sealed cavity 6, the micro-sealed cavity 6 of the present embodiment adopts a hexagonal prism structure, and a plurality of micro-sealed cavities 6 with the hexagonal prism structure are closely arranged to form the writing board 1 of the blackboard.

Second embodiment

This example is provided in consideration of the functionality of the back curtain 2 of the writing board 1 on the basis of the example 1.

Referring to fig. 1, the concept of the curtain 2 of fig. 1 is primarily that the curtain 2 is designed in an end-to-end endless loop configuration by the cooperation of a drive roll 4 and a driven roll 3 (only principles are provided and the fixing parts for fixedly mounting the components are not shown in the figure). When the driving roller 4 drives the curtain 2 to move forward, the position of the curtain 2 at the rear part of the writing board 1 as a substrate can be adjusted. At this moment, can distinguish curtain 2 into different color zone, through the replacement of the curtain 2 of different colors, the colour that transparent region shows after writing is also different, can satisfy different teaching demands.

Furthermore, the rotating shaft of the driving roller 4 is fixedly connected with the rocker 10, so that a user can adjust the position of the curtain 2 by hand.

Referring to fig. 6, another variation of this embodiment is to provide a reducing magnetic stripe 15 on the surface of the curtain 2, wherein the reducing magnetic stripe 15 repels the magnetic powder 5. When the curtain 2 rotates along with the driving roller 4 and drives the reduction magnetic stripe 15 to pass through the back of the writing board 1, the magnetic powder 5 is adsorbed on the magnetic board 7 again through the repelling magnetism of the reduction magnetic stripe 15 and the magnetic powder 5.

Third embodiment

The technology of the present invention will be described in detail below with reference to the accompanying drawings:

referring to fig. 1 to 5, a dust-free multi-color magnetic blackboard which can be freely erased mainly includes a blackboard 1, a writing pen 11 having a magnetic head 12, a blackboard eraser 14 having magnetism, and a background plate. The plate body 1 is composed of three layers, wherein the first layer is a transparent magnetic plate 7, the middle part is a hexagonal pixel grid closed hole 9, magnetic powder 5 is uniformly placed in the hexagonal pixel grid closed hole, and the third layer is a transparent plate 9. The background plate is composed of a curtain 2, rotating shafts 3 and 4 and a rocker 10.

Further, a dust-free multicolor magnetic blackboard capable of being freely erased comprises a blackboard 1, and the blackboard is composed of a three-layer structure, namely a transparent magnetic plate 7, a cavity 8 and a transparent plate 9 in sequence from front to back. The cavity 8 is filled with black magnetic powder 5. The background plate behind the blackboard 1 consists of a curtain 2, rotating shafts 3 and 4 and hand-operated rods 10, the curtain 2 is wound on the upper rotating shaft 3 and the lower rotating shaft 4, and the hand-operated rods 10 are respectively arranged at two sides of the lower rotating shaft 4. In addition, a writing pen 11 with a magnetic head and a blackboard eraser 14 with a magnetic part

The magnetic powder 5 in the cavity 8 is magnetically attracted to the transparent magnetic plate 7, the magnetic powder 5 is repelled from the magnetic pen point 12, and the magnetic powder 5 is magnetically attracted to the magnetic part 14 of the blackboard eraser.

The curtain 2 is equally divided into three colored regions by area and is a solid color.

The size of the writing pen 11 with the magnetic head 12 is the same as that of a common ball-point pen.

The utility model discloses a theory of operation does:

since the magnetic powder 5 in the cavity 8 has different magnetism from the transparent magnetic plate 7 on the outermost layer, the magnetic powder 5 is uniformly adsorbed on the transparent magnetic plate 7 to form the visual blackboard 1.

When the character needs to be written, the penholder 11 is held by hand, and the magnetic pen point 12 repels the magnetism carried by the magnetic powder 5 and attracts the magnetism carried by the transparent magnetic plate 7. Therefore, when the magnetic pen point 12 is stroked on the transparent magnetic plate 7, the magnetic powder 5 is repelled and moved during stroking of the magnetic pen point 12 according to the same magnetic contact repulsion property. Since the transparent plate 9 is colorless, the rear curtain 2 is exposed.

The curtain 2 is composed of three different color regions, so that colored letters or patterns can be seen from the direction of the transparent magnetic plate 7. The screen 2 is wound on the rollers 3, 4, and when the color of the characters needs to be changed, only the rocker 10 below needs to be rotated, and the rocker 10 is integrated with the roller 4. Due to the friction, the roller 4 rotates to drive the curtain 2 to move up and down. The color area can be changed, thereby achieving the purpose of changing color.

When the characters on the blackboard need to be erased, the blackboard eraser 13 is held by hand, the side with the magnetic eraser 14 is used for contacting the blackboard, the magnetism of the magnetic eraser 14 and the magnetism of the magnetic powder 5 are attracted, the magnetism is the same as that of the transparent magnetic plate 7, and the magnetism is larger than that of the transparent magnetic plate 7. According to the nature of mutual attraction of different magnetism, the magnetic eraser 14 attracts the magnetic powder 5 to move in the process of moving slowly on the blackboard, and the magnetic powder 5 is uniformly adsorbed on the transparent magnetic plate 7 in the process of moving. Thereby recovering the original state and achieving the erasing effect.

Claims

1. A dust-free multi-color magnetic blackboard capable of being erased freely comprises a writing board which is composed of a plurality of micro sealed cavities which are closely arranged, and is characterized in that,

the micro sealed cavities are composed of transparent magnetic plates and transparent non-magnetic plates, and the plurality of micro sealed cavities are tightly arranged to enable the magnetic plates to form a plate-shaped writing surface; except the magnetic plate used for forming the writing surface, other cavity walls of the miniature sealed cavity are all composed of non-magnetic plates; magnetic powder is packaged in the miniature sealing cavity and is magnetically attracted with the magnetic plate;

the back of the writing surface is provided with a curtain, and visual contrast exists between the curtain and the magnetic powder packaged in the miniature sealing cavity.

2. A dust-free, multicolor magnetic blackboard according to claim 1, wherein a driving roll and a driven roll are provided on the back of said writing surface, said curtain being connected end to end between said driving roll and said driven roll to form a loop; when the driving roller rotates, the driving roller drives the curtain to rotate around the driving roller and the driven roller.

3. A dust-free, multicolor magnetic blackboard according to claim 2, wherein the rotation shaft of the driving roller is fixedly connected with the rocking bar.

4. A dust-free multi-color magnetic blackboard according to claim 2, wherein the curtain is provided with a magnetic reduction strip which is repulsive to the magnetic powder.

5. A dust-free, multi-color, magnetic blackboard which is freely erasable as claimed in claim 1, wherein the blackboard is provided with a magnetic pen having a magnetic tip at one end, the magnetic tip being magnetically repulsive to the magnetic powder.

6. A dust-free, multi-color, magnetic blackboard which is freely erasable as claimed in claim 1, wherein the blackboard is provided with a magnetic eraser having a magnetic eraser head on one side, the magnetic eraser head being magnetically attracted to the magnetic powder.

7. A freely erasable dust-free multi-color magnetic blackboard according to claim 1, wherein the micro-sealed cavities have a hexagonal prism structure, and a plurality of micro-sealed cavities having a hexagonal prism structure are closely arranged to form a writing board of the blackboard.