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Blackboard eraser with self-cleaning function

A blackboard eraser and functional technology, applied in the field of blackboard eraser, can solve the problems that affect the health of teachers and students, chalk dust cannot be absorbed, and reduce teaching efficiency, so as to avoid flying around, avoid blockage, and facilitate the next use.

Inactive Publication Date: 2021-06-15
上饶墨上艺术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Blackboard eraser is a common item in the existing teaching field. It is mainly used to wipe clean the handwriting written by the teacher on the blackboard with chalk, so that the teacher can write on the blackboard again. When using the blackboard eraser to wipe the blackboard, along with During the quick wiping process of the blackboard eraser, some chalk dust will float around the blackboard eraser and be easily inhaled by teachers and students, seriously affecting the health of teachers and students. It is necessary to absorb and clean the chalk dust around the blackboard eraser
[0003] The existing device for absorbing and cleaning the chalk dust around the blackboard eraser is as described in the invention patent "A Blackboard Eraser for Preventing Chalk Dust from Flying" with the application number "201811337672.6". When detached from the blackboard, the deformed cavity resets to absorb the chalk dust, so that the flying chalk dust is absorbed into the cavity. In actual operation, when wiping the blackboard, the blackboard eraser and the blackboard are constantly rubbed and wiped, so that Wipe the blackboard faster, but in this invention, it is necessary to continuously separate the blackboard eraser from the blackboard to effectively absorb the chalk dust, so that a large amount of chalk dust will be scattered during the process of wiping the blackboard It is around the blackboard eraser and cannot absorb chalk dust, so that these chalk dust will be inhaled by teachers and students, which seriously affects the health of teachers and students. In addition, the blackboard eraser is constantly separated from the blackboard to absorb chalk dust. Waste classroom time and reduce teaching efficiency

Method used

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  • Blackboard eraser with self-cleaning function
  • Blackboard eraser with self-cleaning function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] refer to figure 1 , a blackboard eraser with a self-cleaning function, comprising a case 1 with an opening at the upper end, the inner wall of the case 1 is slidably connected with a movable frame 2 arranged in a vertical direction, the movable frame 2 is provided with a sponge, and the case The inner bottom of 1 is fixedly connected with the airbag 3, and the side wall of the casing 1 is provided with a miscellaneous removal port communicating with the side wall of the lower end of the air bag 3, and the side wall of the miscellaneous removal port is provided with a sealing plug, which can clean the chalk dust sucked into the air bag 3, The lower end of the movable frame 2 is symmetrically and fixedly connected with a sliding plug tube 5 with the opening facing downwards. The sliding plug tube 5 is sealed and slidably connected with a movable rod 6 . A pressure plate 4 is fixedly connected, and a baffle 8 is fixedly connected to the opposite inner wall of the case 1. T...

Embodiment 2

[0026] refer to figure 2 , different from Embodiment 1, the side wall of the movable frame 2 is embedded with a first annular magnet 14, the inner wall of the annular cavity 11 is provided with an annular groove 15, and the inner wall of the annular groove 15 is slidably connected with the first annular magnet 14. Two ring magnets 16, the upper end of the second ring magnet 16 is fixedly connected with a thimble 17 located directly below the suction hole 12.

[0027] In this embodiment, moving down the movable frame 2 will cause the first ring magnet 14 to move down, thereby driving the thimble 17 to move down through the second ring magnet 16, thereby absorbing the chalk dust around the blackboard eraser, and wiping the writing on the blackboard. After cleaning, the movable frame 2 will return to its original position under the action of the spring 9, so that the first ring magnet 14 drives the second ring magnet 16 to move up, thereby driving the thimble 17 to be inserted i...

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Abstract

The invention discloses a blackboard eraser with self-dust cleaning function, which comprises a case with an opening at the upper end, a movable frame arranged vertically on the inner wall of the case, and a pair of Cleaning device for cleaning chalk dust. In the present invention, the moving rod connected in the sliding plug barrel is arranged by sealing and sliding, and the moving plate is pressed so that the sliding plug barrel drives the moving rod to move downward to compress the air bag, and then the air bag will gradually return to the initial state under the action of its own elasticity, and the air bag will gradually return to the original state through the suction The dust hole sucks the chalk dust flying from the outside into the air bag to prevent the chalk dust from flying around. By setting the first ring magnet embedded in the side wall of the movable frame, after the writing on the blackboard is wiped clean, the movable frame will be moved under the action of the spring. Moving upwards drives the first ring magnet to move upwards, so that the thimble is inserted into the suction hole, and the chalk dust accumulated in the suction hole is cleaned to avoid blockage of the suction hole and facilitate the next use.

Description

technical field [0001] The invention relates to the technical field of educational and teaching supplies, in particular to a blackboard eraser with self-cleaning function. Background technique [0002] Blackboard eraser is a common item in the existing teaching field. It is mainly used to wipe clean the handwriting written by the teacher on the blackboard with chalk, so that the teacher can write on the blackboard again. When using the blackboard eraser to wipe the blackboard, along with During the rapid wiping process of the blackboard eraser, some chalk dust will float around the blackboard eraser, and it is easily inhaled by teachers and students, seriously affecting the health of teachers and students. It is necessary to absorb and clean the chalk dust around the blackboard eraser. [0003] The existing device for absorbing and cleaning the chalk dust around the blackboard eraser is as described in the invention patent "A Blackboard Eraser for Preventing Chalk Dust from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B43L21/02
CPCB43L21/02
Inventor 吴小花张洋洋
Owner 上饶墨上艺术有限公司