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Portable cleaning blackboard eraser

A blackboard eraser, portable technology, applied in the field of teaching tools, can solve problems such as human health injury

Inactive Publication Date: 2020-07-14
江萍萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned problems bring great inconvenience to teachers and students on duty, while inhaling dust for a long time can also cause harm to human health

Method used

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  • Portable cleaning blackboard eraser
  • Portable cleaning blackboard eraser
  • Portable cleaning blackboard eraser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] Embodiment: portable cleaning blackboard eraser, such as figure 1 As shown, it is composed of a shell 1 and a movable sassafras 2 installed therein. There is a groove 6 on the top of the shell 1, and finger mark depressions 7 are arranged on the front and rear sides of the shell 1, which is convenient for hand-held operation of the blackboard eraser. Such as figure 2 As shown, the movable soft sassafras 2 is made of soft felt or sponge, and the left and right ends are symmetrically provided with a left connecting plate 3 and a right connecting plate 4, and a circular shaft 8 is arranged on the left connecting plate 3 and the right connecting plate 4, through which The circular shaft 8 is fixed to the casing 1 and can rotate around the circular shaft 8 . A hinge plate 5 is connected between the left connecting plate 3 and the right connecting plate 4, and the hinge plate 5 is hinged with the left connecting plate 3 and the right connecting plate 4 respectively, and ca...

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Abstract

The invention relates to a teaching tool, in particular to a portable cleaning blackboard eraser. The portable cleaning blackboard eraser comprises a shell, a movable soft eraser is installed in the shell, and a left connecting plate and a right connecting plate are symmetrically arranged at the left end and the right end of the movable soft eraser. The left connecting plate and the right connecting plate are fixed to the shell through circular shafts, a hinge plate is arranged between the left connecting plate and the right connecting plate and hinged to the left connecting plate and the right connecting plate, and a groove is formed in the top of the shell and can allow the hinge plate to stretch out and draw back. A handle is arranged on the hinge plate, the hinge plate is stretched outwards with force, the hinge plate drives the left connecting plate and the right connecting plate to rotate, the left end and the right end are close to each other and extrude each other, and redundant water is squeezed out. When a blackboard is wiped through a wet eraser, dust can be prevented, and harm to the body is avoided.

Description

technical field [0001] The invention relates to a teaching tool, in particular to a portable cleaning blackboard eraser. Background technique [0002] Blackboard eraser is a common tool in teaching. Blackboard erasers are divided into cuboid and hand-held according to their shapes. According to the function, it can be divided into magnetic whiteboard type, sponge vacuum type and tablet type. The above types of blackboard erasers have limited overall cleaning ability due to wiping dust, and cannot wipe dust very effectively. Especially after each writing, there is a large amount of chalk dust left on the blackboard. If the whiteboard is not cleaned for a long time, it is easy to be stained with dust. If the existing wiper is used to wipe, the dust will scatter and fly arbitrarily, which will affect health. In order to reduce the flying of dust, a wet wiper is used to wipe the blackboard, but the existing wiper is difficult to squeeze the water when cleaning with water, and...

Claims

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Application Information

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IPC IPC(8): B43L21/02
CPCB43L21/02
Inventor 江萍萍
Owner 江萍萍
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