Dust-free blackboard eraser

A blackboard eraser and board eraser technology, which is applied to the cleaning device, printing, office supplies and other directions of blackboard or slate, can solve the problem of not being able to play a role in dust prevention, not solving the secondary pollution of chalk dust, and not having obvious dustproof effect. , to achieve good dustproof effect

CN106313985AInactive Publication Date: 2017-01-11张英俊
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-01-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to auxiliary equipment for teaching, in particular to a dust-free blackboard eraser. The dust-free blackboard eraser comprises a blackboard eraser body (1). The blackboard eraser body (1) comprises two or more cotton-wool brush rolls (2). The cotton-wool brush rolls (2) of the blackboard eraser are connected with a dust storage box body (3) through rotating shafts. The distance between every two adjacent cotton-wool brush rolls (2) ranges from 0.8 cm to 1.5 cm. A brush body (4) is arranged at the position, below each cotton-wool brush roll (2), inside the dust storage box body (3). The free end of each brush body (4) is in close contact with the corresponding cotton-wool brush roll (2). A connecting plate (5) for connecting the brush bodies (4) is of a net structure. Dust humidifying devices (6) are arranged at the positions, below the connecting plate (5), inside the dust storage box body (3). A control switch is arranged at the outer side of the dust storage box body (3). The dust-free blackboard eraser has the beneficial effects that the structure is simple; production cost is low; chalk dust cannot fly everywhere in the blackboard erasing process; in addition, the chalk dust cannot fall onto the ground; and the dust prevention effect is good.
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Description

technical field

[0001] The invention relates to the technical field of teaching auxiliary equipment, in particular to a dust-free blackboard eraser. Background technique

[0002] Chalk is an indispensable writing tool in teaching, and it is used in classes from elementary school to university. And the pollution problem of chalk dust has also attracted people's attention all the time, so there are many designs to solve chalk dust. Such as dust-free chalk, dust-proof blackboard eraser, etc., dust-proof blackboard eraser is generally designed with a circle of dust-proof sponge on the outer ring of flannelette of blackboard eraser, so that it can effectively suppress the rise of chalk dust to a certain extent. However, the dustproof effect of this kind of blackboard eraser is not obvious, and it is generally knocked when dealing with chalk dust. At this time, a certain amount of dust pollution will still be caused. For example, during class, teachers often use blackboard erase...

Examples

Embodiment 1

[0023] A dust-free blackboard eraser, such as figure 1 As shown, the blackboard eraser body 1 is included; the blackboard eraser body 1 includes at least two cotton-hair brush rollers 2, the cotton-hair brush rollers 2 are connected with the ash storage box 3 through a rotating shaft, and between two adjacent cotton-hair brush rollers 2 The distance between them is 0.8-1.5cm; the inside of the ash storage box 3 and the bottom of the cotton brush roller 2 are provided with a brush body 4, and the free end of the brush body 4 is in close contact with the cotton brush roller 2, and the connection of the brush body 4 is connected. The plate 5 has a mesh structure, the dust humidifier 6 is provided under the connecting plate 5 and inside the ash storage box 3, and a control switch is provided outside, and the ash storage box 3, the connecting plate 5 and the protective cover 7 form a cavity.

[0024] The outer surface of the ash storage box 3 is provided with a first buckle structu...