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Fully-automatic blackboard eraser with controllable magnetic force and teaching system

A blackboard eraser, fully automatic technology, applied in the field of automatic blackboard eraser and teaching system, can solve the problems of difficulty in moving the blackboard eraser, blackboard falling off, etc.

Inactive Publication Date: 2019-06-21
贾雪荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art that the automatic blackboard eraser is easy to fall off the blackboard during use, or the blackboard eraser is difficult to move due to excessive magnetic force, and the present invention provides a fully automatic blackboard with controllable magnetic force Wipe, by increasing or decreasing the number of magnets and adjusting the distance between the magnet and the blackboard to control the magnetic force of the automatic blackboard eraser on the blackboard

Method used

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  • Fully-automatic blackboard eraser with controllable magnetic force and teaching system
  • Fully-automatic blackboard eraser with controllable magnetic force and teaching system
  • Fully-automatic blackboard eraser with controllable magnetic force and teaching system

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Experimental program
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Effect test

Embodiment 1

[0036] combine Figure 1~4 A fully automatic blackboard eraser with controllable magnetic force in this embodiment includes a blackboard eraser housing 100 and a magnetic force unit, a drive unit and an erasing unit arranged on the bottom surface of the blackboard eraser housing 100 . The magnetic unit is used to attach the blackboard eraser housing 100 to the blackboard, and the drive unit is used to drive the blackboard eraser housing 100 to move along a preset direction on the blackboard. During the movement of the blackboard eraser housing 100, the erasing unit can Finish erasing the blackboard.

[0037] In this embodiment, the magnetic unit includes a magnet 310, a compression spring 350 and a magnetic unit housing 370, the magnet 310 and the compression spring 350 are located in the magnetic unit housing 370, the magnets 310 are stacked, and one end of the compression spring 350 is against the blackboard eraser housing 100 , the other end of the compression spring 350 i...

Embodiment 2

[0041] This embodiment is an improved solution of Embodiment 1. Specifically, the magnetic unit housing 370 can also be provided with an adjusting bolt 340 , and a positioning hole or a screw hole matching the adjusting bolt 340 is opened on the magnet 310 . The purpose of setting the adjusting bolt 340 is to control the distance between the magnet 310 and the bottom surface of the blackboard eraser housing 100 through the adjusting bolt 340, so as to realize the continuous adjustment of the magnetic force of the automatic blackboard eraser on the blackboard surface. In order to achieve the above purpose, the adjusting bolt 340 can be fixed on the bottom surface of the blackboard eraser housing 100 , then the magnet 310 is threaded on the adjusting bolt 340 , and finally the nut 330 is tightened. After the nut 330 touches the magnet 310, continue to tighten the nut, and the compression spring 350 will push against the magnet 310. At this time, the nut can be properly tightened ...

Embodiment 3

[0047] A fully automatic blackboard eraser with controllable magnetic force of this embodiment has basically the same structure as that of Embodiment 2, the difference being that four compression springs 350 are symmetrically arranged in the magnetic unit housing 370, and these four compression springs 350 can be respectively located at four corners of the magnetic unit housing 370 , and the upper end of the compression spring 350 is fixedly connected to the bottom surface of the blackboard eraser housing 100 . The purpose of adopting this structure is that when increasing or decreasing the number of magnets 310 or adjusting the distance of magnets 310 to the bottom surface of blackboard eraser housing 100, the overall thrust of compression spring 350 on magnets 310 is uniform, thereby ensuring that magnets 310 are always parallel to blackboard surface.

[0048] As a further optimization of this embodiment, a spacer 360 can be provided between the compression spring 350 and th...

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Abstract

The invention discloses a fully-automatic blackboard eraser with controllable magnetic force and a teaching system, and belongs to the field of teaching appliances. The fully-automatic blackboard eraser with the controllable magnetic force comprises a blackboard eraser shell and further comprises a driving unit, an erasing unit and a magnetic force unit which are located on the bottom face of theblackboard eraser shell; the magnetic force unit comprises a magnetic force unit shell, one or more magnets arranged in the magnetic force unit shell in an overlapped mode are jacked on the bottom face of the magnetic force unit shell by compressing springs. According to the fully-automatic blackboard eraser with the controllable magnetic force, the magnitude of the magnetic force of the fully-automatic blackboard eraser is roughly adjusted by increasing and decreasing the number of the magnets, by arranging adjusting bolts capable of being matched with the compressing springs and the magnets,the magnitude of the magnetic force is continuously adjusted, thus the fully-automatic blackboard eraser does not fall off from a blackboard in the using process, and the situation that the fully-automatic blackboard eraser cannot move due to the overlarge magnetic force is also avoided. The teaching system comprises the fully-automatic blackboard eraser with the controllable magnetic force and the irony magnetic blackboard matched with the fully-automatic blackboard eraser, using by a teacher is convenient, and the classroom efficiency is improved.

Description

technical field [0001] The invention relates to a blackboard cleaning device, in particular to a fully automatic blackboard eraser and a teaching system with controllable magnetic force. Background technique [0002] In the daily teaching process in schools and other places, the blackboard is one of the indispensable teaching aids. Generally, a blackboard in the traditional sense refers to a hard surface that can be written with chalk, and needs to be erased with tools such as a blackboard eraser, so as to realize the repeated use of the blackboard. During the use of traditional manual blackboard erasers, the arms need to be moved repeatedly, causing fatigue to the human body. At the same time, the dust generated during the erasing process of the blackboard is inhaled into the lungs of teachers and students, seriously endangering health. [0003] At present, a fully automatic blackboard eraser has been disclosed to solve the above problems, such as patent application numbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L21/00B43L1/04
Inventor 贾雪荣
Owner 贾雪荣
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