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Novel blackboard eraser

A blackboard eraser, a new type of technology, applied to the cleaning device of blackboard or slate, printing, office supplies, etc., can solve the problems of internal cleaning trouble, inconvenient holding, wear or buckle at the buckle, etc., to achieve convenient internal cleaning, The effect of convenient disassembly and installation and convenient volume

Pending Publication Date: 2015-12-16
刘书廷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing blackboard erasers can only wipe the words or patterns written with chalk on the blackboard. When wiping, chalk dust will float in the air, which is easy to inhale into the human body and affect health. Dust inhalation device, while the existing blackboard eraser with dust suction is bulky and inconvenient to hold, and it adopts a hard buckle connection. Too many times of disassembly will easily cause the buckle to be worn or broken, which will affect the procedure and use. Internal cleaning trouble

Method used

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  • Novel blackboard eraser

Examples

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Embodiment Construction

[0016] Examples, see e.g. figure 1 As shown, a novel blackboard eraser comprises a base plate 10 and an upper housing 20, the upper plane of the base plate 10 has an upwardly extending annular extension wall 11, the outer wall of the annular extension wall 11 has a concave hole 12, and the upper housing 20 The ball plunger 1 is screwed into the threaded hole on the inner side wall of the lower part, the annular extension wall 11 is inserted into the lower part of the upper housing 20, and the steel ball of the ball plunger 1 is nested in the corresponding concave hole In 12, the base plate 10 has a plurality of air intake through holes 13, and the bottom surface of the base plate 10 is fixed with a brush layer 30;

[0017] A connecting plate 14 is inserted and sleeved in the annular extension wall 11, and a miniature suction pump 2, a storage battery 3 and a control board 4 are fixed on the connection board 14, the miniature suction pump 2 is electrically connected to the cont...

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PUM

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Abstract

The invention discloses a novel blackboard eraser. The novel blackboard eraser comprises a bottom plate and an upper shell. An annular extending wall extending upwards is arranged on the upper plane of the bottom plate. Concave holes are formed in the outer walls of the annular extending wall. Ball head plungers are in screw connection into screw joint through holes in the inner side walls of the lower portion of the upper shell. The annular extending wall is inserted in the lower portion of the upper shell in a sleeved manner. Steel balls of the ball head plungers are embedded in the corresponding concave holes. The bottom plate is provided with a plurality of air inlet through holes. A brush layer is fixed to the bottom face of the bottom plate. A connecting plate is inserted in the annular extending wall in a sleeved manner. A mini-type suction pump, a storage battery and a control main panel are fixed to the connecting plate. Dust adsorption can be achieved through the novel blackboard eraser during blackboard wiping, and the novel blackboard eraser is small in size so that the novel blackboard eraser can be conveniently held by hand. Meanwhile, the ball head plungers are used for fixing, dismounting and mounting are convenient, and internal cleaning is convenient.

Description

Technical field: [0001] The invention relates to the technical field of teaching equipment, in particular to a novel blackboard eraser. Background technique: [0002] Existing blackboard erasers can only wipe the words or patterns written with chalk on the blackboard. When wiping, chalk dust will float in the air, which is easy to inhale into the human body and affect health. Dust inhalation device, while the existing blackboard eraser with dust suction is bulky and inconvenient to hold, and it adopts a hard buckle connection. Too many times of disassembly will easily cause the buckle to be worn or broken, which will affect the procedure and use. Difficult to clean inside. Invention content: [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a new type of blackboard eraser, which can absorb dust when wiping the blackboard. Its volume is small and easy to hold by hand. At the same time, it is fixed by a ball plunger, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L21/02B43L21/00
Inventor 刘书廷
Owner 刘书廷
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