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Novel portable blackboard eraser

A portable blackboard eraser technology, which can be used in blackboard or slate cleaning devices, printing, office supplies, etc., and can solve the problem that the blackboard eraser cannot be dried quickly

Pending Publication Date: 2021-08-20
赵艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the blackboard eraser cannot be dried quickly after being washed with water, and propose a new type of portable blackboard eraser

Method used

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  • Novel portable blackboard eraser
  • Novel portable blackboard eraser
  • Novel portable blackboard eraser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] refer to Figure 1-4 , a new type of portable blackboard eraser, comprising a top cover 1, the inner surface of the top cover 1 is fixedly connected with a cleaning sponge 2, the left surface of the top cover 1 is provided with a USB interface 3, and the inner surface of the top cover 1 is fixedly connected with a placement block 4. The lower surface of the placement block 4 is embedded with an electric heating block 5, and the lower surface of the placement block 4 is provided with a placement groove 17. The inner wall of the placement groove 17 is provided with two symmetrically distributed electrical contacts 18, and the upper inner surface of the placement groove 17 The surface is fixedly connected with a connecting sponge 16. The thickness of the connecting sponge 16 is equal to the distance between the electric contact 18 and the upper inner surface of the placement groove 17. The upper surface of the placement block 4 is provided with a storage battery 19, storage...

Embodiment 2

[0032] refer to Figure 5-6 The difference with Embodiment 1 is that: the left surface of the placement slot 17 is provided with a first chute 20, the left surface of the first chute 20 is provided with a first electromagnet 8, and the inner surface of the first chute 20 slides The first slide plate 7 is connected, the left surface of the first slide plate 7 is provided with the first permanent magnet 13, the N pole of the first permanent magnet 13 is opposite to the N pole of the first electromagnet 8, and the right surface of the first slide plate 7 is fixedly connected There is a plugboard 9, the right surface of the placement groove 17 is provided with a second chute 12, the right surface of the second chute 12 is provided with a second electromagnet 15, and the inner surface of the second chute 12 is slidably connected with a second slide plate 10 , the right surface of the second slide plate 10 is provided with a second permanent magnet 11, the N pole of the second perma...

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PUM

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Abstract

The invention discloses a novel convenient blackboard eraser, which comprises a top cover, a cleaning sponge is fixedly connected to the inner surface of the top cover, a USB interface is formed in the left surface of the top cover, a placing block is fixedly connected to the inner surface of the top cover, an electric heating block is embedded on the lower surface of the placing block, a placing groove is arranged on the lower surface of the placing block, the inner wall of the placing groove is provided with two electric contacts which are symmetrically distributed, the upper inner surface of the placing groove is fixedly connected with a connecting sponge, the thickness of the connecting sponge is equal to the distance between the electric contacts and the upper inner surface of the placing groove, the upper surface of the placing block is provided with a storage battery, and the storage battery, the electric heating block and the USB interface are electrically connected. The invention relates to the technical field of teaching equipment, the electrical conductivity of water and the water absorption volume expansion of sponges are utilized, so that the resistance of the electric contacts in a circuit can be reduced along with the increase of the water quantity in the connecting sponge, and the efficiency of an electric heating block is also increased.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, in particular to a novel portable blackboard eraser. Background technique [0002] The blackboard does not specifically refer to the black board surface. In the traditional sense, it is a plane that can be written repeatedly. The board surface is hard and is mostly used for teaching. Mostly black, dark green, white. [0003] Blackboard eraser and chalk are also used with the blackboard. Use chalk to write on the blackboard, and the blackboard eraser will erase the chalk on the blackboard to provide a place for subsequent writing on the blackboard. [0004] After the current blackboard eraser wipes the blackboard several times, more and more dust will accumulate on the blackboard eraser, which will affect the subsequent erasure of chalk dust on the blackboard. When writing on the blackboard, the chalk characters will appear blurred, resulting in the following Some people can't see cle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L21/00
CPCB43L21/00
Inventor 赵艳
Owner 赵艳