Dust removing blackboard eraser

A blackboard eraser and dust storage technology, which is applied in the field of teaching equipment, can solve the problems of no simultaneous consideration, poor effect, and limited ability to absorb chalk dust, and achieve the effects of convenient and flexible use, avoiding secondary scattering, and good dust removal effect

Inactive Publication Date: 2019-07-26
刘维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although the device is small in size, flexible and convenient to use, the device has limited ability to absorb chalk dust, and the effect is not good.
[0005] The design in the prior art does not consider both the need for fast erasure when erasing a large area and the need for targeted erasure when erasing a small area is required

Method used

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  • Dust removing blackboard eraser
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  • Dust removing blackboard eraser

Examples

Experimental program
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Effect test

Embodiment 1

[0028] refer to Figure 1 to Figure 3 , the present embodiment provides a dust-removing blackboard eraser, such as figure 1 As shown, the dust-removing blackboard eraser includes a slide bar 1, a dust collecting device 2, a blackboard eraser 3, a dust suction pipe 4 and a dust outlet pipe 5, and the slide bar 1 is fixedly mounted on the top of the blackboard 8, and the distance from the upper edge of the blackboard 8 is 30cm, the slide bar 1 is a stainless steel bar with a section of 0.5cm×2cm, the long side of the section of the stainless steel bar is set parallel to the wall, a groove is arranged longitudinally on the stainless steel bar as a track, and a hanging device is set on the upper side of the stainless steel bar Fixed on the wall, the dust collection device 2 is provided with a pulley to cooperate with the groove track, and is slidably connected to the slide bar 1. The slide bar 1 is smooth enough to allow the dust collection device 2 to be moved easily. Another em...

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Abstract

The invention provides a dust removing blackboard eraser. The blackboard eraser comprises a sliding rod, a dust collecting device, a blackboard erasing device, a dust suction pipe and a dust outlet pipe, the dust collecting device is slidably connected with the sliding rod, the dust collecting device comprises a housing and a negative pressure device, the housing is internally provided with the negative pressure device, the negative pressure device is provided with a dust suction hole, a dust outlet and a gas discharging hole, and the blackboard eraser is provided a dust suction cavity, a duststorage cavity and bristles; the dust suction cavity is connected with a negative pressure chamber through the dust suction pipe to form a dust suction loop, and the dust storage cavity is connectedwith the dust outlet through the dust outlet pipe to form a dust outlet loop. The blackboard eraser has the advantages that the use is convenient and flexible, the dust removing capacity is high, timeand strength are saved when large-area erasing is conducted, and the targeting performance is high when the blackboard eraser is used for performing targeted revising on mistakes or small-area erasing.

Description

technical field [0001] The invention designs a teaching tool, in particular to a dust-removing blackboard eraser. Background technique [0002] In the teaching process, using a blackboard eraser to erase the chalk words written on the blackboard will produce a large amount of chalk dust, which will damage the health of the user, especially teachers and students sitting in the front row. Although the existing blackboard eraser can The chalk writing on the blackboard is erased, but there are many problems in dust removal and use. [0003] Patent CN201128335 is a kind of dust-proof blackboard eraser, which discloses that the top and the bottom of the blackboard body are provided with chute respectively, and the two ends of the blackboard eraser are provided with pulleys, the pulleys slide and cooperate with the top and bottom chute of the blackboard body, and are arranged inside the blackboard eraser. Vacuum cleaner; the blackboard eraser provided by this invention has a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L21/02
CPCB43L21/02
Inventor 刘维智刚毅杨潇楠杜亚娟孙少辉
Owner 刘维
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