CN2557341Y

CN2557341Y - Blackboard eraser

Info

Publication number: CN2557341Y
Application number: CN 02268116
Authority: CN
Inventors: 张越
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-09
Filing date: 2002-07-09
Publication date: 2003-06-25
Anticipated expiration: 2012-07-09

Abstract

The utility model relates to a blackboard eraser which comprises a wiping body and bristles, wherein the wiping body is a cavity body in which a round brush is arranged; the outer surface of the round brush is covered with the bristles, and both ends of the round brush are provided respectively with a roller at the center part. The upper two sides of each of the rollers are respectively provided with a friction wheel which is fixed to the inner surface of the wiping body, and the upper top position of the friction wheel is lower than the top of the round brush. The inner bottom of the wiping body is provided with a ribbed slab of which the top is contacted with the bristles covered on the round brush. The top of the wiping body is provided with an opening cover plate of which the center is provided with an exposed slot which is lower than the friction wheels and the top of the round brush. The blackboard eraser of the utility model can absolutely solve problem of pollution due to chalk dust by using blackboard erasers.

Description

Blackboard eraser

The utility model relates to a kind of blackboard eraser that erases the board,

The blackboard eraser that the teacher uses in various schools all is made of rub body and bristle at present, though their structures are simple, cheap for manufacturing cost, use dust and dances in the air all over the sky, has had a strong impact on environmental sanitation and teachers and students' physical and mental health.

The purpose of this utility model is exactly in order to address the above problem, and a kind of dust-free black board eraser that does not have chalk dust when grasping blackboard is provided.By blackboard eraser of the present utility model, can thoroughly solve the chalk ash pollution problem of blackboard eraser.

Foregoing invention purpose of the present utility model realizes by following technical proposals:

A kind of blackboard eraser, it includes rub body and bristle, it is characterized in that rub body is a cavity body, its inside is equipped with an appearance and is covered with the circle brush that acute hair and two auspicious centers respectively have roller, roller is by the bearing block of the bearing of packing into, holddown spring links to each other with the rub body lower surface, both sides above the roller respectively be provided with one be fixed on the rub body inner surface and on the position, top be lower than the friction pulley at circle brush top, constitute frictional fit with roller, be provided with gusset at the rub body inner bottom part, its top brushes the bristle that is covered with circle and contacts, be provided with the opening cover plate at the rub body top, its center has the groove that exposes and be lower than friction pulley and circle brush top.

Described blackboard eraser is provided with appearance and is covered with the circle brush that bristle and two ends respectively have roller, and roller can rotate by the bearing that has holddown spring, and roller is because the effect of holddown spring and friction pulley constitute frictional fit, like this, when erasing the board, friction pulley rotates, and drives roller with matching, makes the counter-rotating of circle brush.Thereby wipe letter written with chalk, simultaneously dust is got rid of forward, the gap of brushing both sides by cover plate and circle enters into the rub body inner chamber.And make chalk dust can not fly upward everywhere, thoroughly solved the pollution problem of chalk dust.The described gusset that is contained in the rub body inner bottom part, its purpose are to play the effect that bullet falls to stick in the dust on the bristle of scraping.

In order to make circle brush and roller firmly stable, rotate flexibly, described roller devices and is equipped with holddown spring between bearing block bottom and the rub body bottom on bearing block, thereby can make the pressure increase increase frictional force between roller and the friction pulley.In order to make blackboard eraser when erasing the board, keep balance, and make round brush can rotate the power that provides enough flexibly, be respectively equipped with one in both sides above the roller and be fixed on the rub body inner surface and become the friction pulley of frictional fit with roller.

Rub body is that detachable interface arrangment is connected with cover plate, and its purpose is that the dust in the rub body is long-pending for a long time, can convenient disassembly, and open cover plate and pour out dust and get final product,

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is the utility model structural representation.

Embodiment 1:

A kind of blackboard eraser, it includes rub body 4 and bristle 1, it is characterized in that rub body 4 is cavity body, its inside is equipped with an appearance and is covered with the circle brush 9 that bristle 1 and center, two ends respectively have roller 8, roller 8 is by the bearing block 7 of the bearing of packing into, holddown spring 6 links to each other with rub body 4 lower surfaces, both sides above the roller 8 respectively be provided with one be fixed on rub body 4 inner surfaces and on the position, top be lower than the friction pulley 3 at acute 9 tops of circle, constitute frictional fit with roller 8. be provided with gusset 6 at rub body 4 inner bottom parts, its top is brushed the bristle 1 that is covered with on 9 with circle and is contacted, be provided with the opening cover plate 2 of detachable interface arrangment at rub body 4 tops, its center has the groove that exposes and be lower than friction pulley 3 and circle brush 9 tops.

Claims

1. blackboard eraser, it includes rub body [4] and bristle [1], it is characterized in that rub body [4] is cavity body, its inside is equipped with an appearance and is covered with the circle brush [9] that bristle [1] and center, two ends respectively have roller [8], roller [8] is by the bearing block [7] of the bearing of packing into, holddown spring [5] links to each other with rub body [4] lower surface, respectively be provided with one is fixed on rub body [4] inner surface and goes up the friction pulley [3] that the position, top is lower than circle brush [9] top in both sides, roller [8] top, constitute frictional fit with roller [8], at rub body [4] inner bottom part to be provided with gusset [6], its top brushes the bristle [1] that is covered with circle and contacts, be provided with opening cover plate [2] at rub body [4] top, its center has the groove that exposes and be lower than friction pulley [3] and circle brush [9] top.

2. by the described a kind of blackboard eraser of claim 1, it is characterized in that rub body [4] and opening cover plate [2] are that detachable interface arrangment is connected.