CN86209589U

CN86209589U - Electric dustless eraser for blackboard

Info

Publication number: CN86209589U
Application number: CN 86209589
Authority: CN
Inventors: 伍铁军; 李业华
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-12-03
Filing date: 1986-12-03
Publication date: 1987-10-07

Abstract

The utility model discloses an electric dustless blackboard eraser which is composed of a dust storing bag, a dust cover, an air-breathing impeller of a felt fair brush, a motor, etc., wherein, the felt fair brush is driven by the motor to rotate and erase the dust trace, the rotation of the air-breathing impeller is used to cause the relative low pressure area of an ambient cavity to cause the dust to be concentrated towards the circumference, the dust enters the dust storing bag under the breathe of the air-stream of the air-breathing impeller. Under the action of the dust cover and a compressed spring, the utility model has the advantages of simple structure, convenient portability and high cleanness, and assures the erased dust completely enter the dust storing bag without flying around.

Description

Electric dustless eraser for blackboard

The utility model relates to a kind of stationery article.

Common blackboard eraser is made up of felt hair and metal thin skin shell etc., when blackboard wiping, by the manpower pushing, moves on blackboard surface, and the chalk writing on the blackboard is wiped.But powder flies upward, and has a strong impact on the cleaning of health and clothing.The electric dust absorption blackboard eraser patent had already, as a kind of suction powder blackboard brush that CN8521057U announced, adopt the design of centrifugal fan principle, dust is sucked and collected in the Storage Box by the brush board centre bore, but owing to still adopt the manpower wiping, but do not have dust guard, though dust from flying reduces relatively, but still thoroughly do not address this problem, simultaneously by the manpower wiping, also influenced the cleanliness factor of wiping.

The purpose of this utility model is to provide a kind of electronic wiping automatic dust absorption, and has the electric dust-less blackboard wiping of dust guard, and is simple in structure, uses easy to carry.

The concrete structure scheme that the utility model electric dust-less blackboard is wiped is described below in conjunction with the accompanying drawings.

Brush body (3): have the opening shell spill brush body of round cavity on closing cap, to have a circular hole with the concentric air-breathing suction wheel of placement (5) rotating shaft of round cavity in one, on the brush body surrounding edge, have several, the port of dust air stream circulation, the openend shell wall of brush body have a circle trapezoid boss.

Absorbing impeller (5): be made up of three or four vanes, be fixed on the motor shaft that the circular hole from the brush body closing cap packs into, the shape of blade is rotated with motor shaft when it guaranteeing, effectively the dust in the brush body is siphoned away to good.

Felt woollen brush (4) felt woollen brush can be designed to multiple shape, but will guarantee it and motor shaft conveniently assemble and disassemble.

Dust cover (12) is a circle tube member, has a circle dovetail groove on the end face, and a circle stage clip is arranged in the dovetail groove.The trapezoid boss of brush body utilizes the elasticity of material, is pressed in the dovetail groove, makes the relative brush body of dust cover both certain stretching motion can be arranged, again can be from slippage on the brush body.

Storage dirt bag (1) is to be connected the outer annular cloth bag of brush body.Dustproof can entering by the hole around the brush body on the storage dirt bag has a circle to clap chain type bag door (9), and after zip mode bag door was opened, storage dirt bag can open the removing dust.

Starting switch (8) is installed on the handle (7), and handle is fixed on the motor housing.

This blackboard eraser comprises a storage dirt bag (1), brush body (3), felt woollen brush (4) altogether, absorbing impeller (5), a motor (6), handle (7), a starting switch (8), zip mode bag door (9), felt hair (10), stage clip (11) and dust cover compositions such as (12).

During work, press out switch (8), motor (6) drives absorbing impeller (5) and felt woollen brush (4) and felt hair (10) rotation, the people firmly is pressed in blackboard eraser on the blackboard, dust cover (12) contacts with blackboard, cover institute wiping position, since under pressure effect perpendicular to blackboard surface, (this pressure the person of being to use apply), and stage clip (11) is compressed, thereby dust cover (12) inwardly shrinks certain distance, the felt hair (10) of rotation is contacted with blackboard surface, and the user wants mobile blackboard to wipe, and just can wipe the chalk writing at any position on the blackboard, because under the effect of absorbing impeller, cavity air all around is discharged from, thereby forms relatively low pressure gas, and the dust of wiping is just to cavity is concentrated all around, under the effect of absorbing impeller air-flow, enter storage dirt bag (1) by leakproof valve (2) along passage.The effect of leakproof valve (2) is that the dust that enters storage dirt bag (1) can not be flowed out.

After storage dirt bag (1) is full of, open zip mode bag door (9), pour out dust and get final product, after felt hair (10) wearing and tearing or damaging, replaceable felt woollen brush (4).

As long as user's control is pressed in the size of the power on the blackboard eraser, dust cover (12) can shrink and stretch out relatively, guarantees that felt woollen brush contacts with blackboard surface with dust cover simultaneously in wiping process, and can accomplish heavily to wipe and dab.

It is close with ordinary blackboard eraser that this electric dust-less blackboard is wiped size, but that shape can be made is different with existing blackboard eraser, as garden shape etc.This blackboard eraser has simple in structure, uses easy to carryly, can be suitable for large, medium and small school and all places to operate schools and use, accomplish substantially dustless, thereby guaranteed the cleaning of people's healthy and environment.

Claims

1, the electric dust-less blackboard wiping is that motor, brush body, felt woollen brush, impeller, dust cover are formed by storage dirt bag.When it is characterized in that being installed in the motor rotation on the brush body blind end, absorbing impeller and felt woollen brush that drive is fixed on the motor shaft rotate together, when the people firmly is pressed in this blackboard eraser on the blackboard, the dust cover that is connected the brush body openend by dovetail groove just compresses the stage clip in the dovetail groove, and brush body inwardly shrinks relatively, make rotating felt woollen brush and blackboard knot touch, the writing on cleaning off a blackboard is because the contraction of dust cover is to lean on the reaction force of blackboard to overcome stage clip power.So in whole wiping process, cover all the time by the wiping position, prevented flying upward of dust, the suction of the absorbing impeller generation in the brush body focuses on the dust in the brush body in the storage dirt bag simultaneously.

2, electric dust-less blackboard according to claim 1 is wiped, and it is characterized in that below the brush body (3) a telescopic dust cover (12) being arranged.

3, electric dust-less blackboard according to claim 1 is wiped, and it is characterized in that the curved storage dirt of chow ring bag (1) is arranged on the brush body (3).

4, electric dust-less blackboard according to claim 1 is wiped, and it is characterized in that installing simultaneously on the motor shaft absorbing impeller (5) and felt woollen brush (4).

5, electric dust-less blackboard according to claim 1 is wiped, and it is characterized in that the last design of reservoir bag (1) has a zip mode bag door (9).