CN2333553Y

CN2333553Y - Dustproof eraser

Info

Publication number: CN2333553Y
Application number: CN 98230425
Authority: CN
Inventors: 何恋立
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-30
Filing date: 1998-03-30
Publication date: 1999-08-18
Anticipated expiration: 2008-03-30

Abstract

The utility model relates to a dustproof blackboard brush. The utility model is composed of a closed box body, a handle, a drum, a driving wheel, brush wheels, a dust pouring door and a supporting wheel. The utility model is characterized in that the surface of the drum is provided with felt, one end is provided with a gear, both sides are provided with the brush wheels, the driving wheel is arranged on the bottom of the box body, one end of the driving wheel is provided with a gear engaged with the gear of one end of the drum, the other end of the driving wheel is provided with a belt disc, and the two brush wheels are driven to rotate by a belt. The utility model has the advantages of simple structure, easy fabrication, good erasing effect and low cost. Hands can not be dirtied when the utility model is used, and flying chalk dust can not be caused. The utility model can avoid air from being polluted by chalk dust, and can avoid human health from being damaged by chalk dust. The utility model is suitable for different schools.

Description

A kind of dustproof blackboard brush

The utility model relates to a kind of teaching aid, is a kind of dustproof blackboard brush specifically.

Present all kinds of school, particularly middle and primary schools are in the writing on the blackboard process of teaching, and what still generally use is chalk and blackboard, and the blackboard brush of current use, still traditional hairbrush or felt brush.This traditional blackboard brush, after using repeatedly, itself will amass full dust, not only made dirty palm but also be difficult to clean off a blackboard, more seriously in the process of wiping the examination blackboard or when knocking out the chalk dust of piling up on the hairbrush, cause flying upward of chalk dust, pollute indoor air, have a strong impact on the healthy of Faculty and Students.

The purpose of this utility model is: for overcoming the defective of above-mentioned blackboard brush, provide in a kind of use, the hand of neither making dirty can not cause the dustproof blackboard brush of dust from flying again, to avoid chalk dust to Faculty and Students' health affected.

The purpose of this utility model is achieved in that in the box body of a sealing, it is the cylinder of felt that design has a surface, one end of cylinder is provided with gear, the felt of cylinder exposes box plate, it can contact with blackboard panel during use, and in order to wipe the chalk writing on the blackboard and to cling chalk dust, each design has a bristle brush wheel in the both sides of cylinder, the bristle of bristle brush wheel contacts with the felt of cylinder, in order to brush the dust on the cylinder surface felt; A surface is arranged is the driving wheel of rubber in design between cylinder and box plate, this driving wheel exposes box plate and can contact with the blackboard surface, one end design gear of driving wheel and with cylinder one end on gears engaged, roll back and forth on the blackboard surface in order to drive felt calender, rub off chalk marks; The other end of driving wheel is provided with belt pulley, link to each other with belt pulley on two bristle brush wheels respectively by belt, rotate in order to drive bristle brush wheel, so that brush falls the dust of piling up on the felt calender, design has the baffle plate of circular arc above cylinder, the dust that brush is fallen can not fallen on the felt of cylinder again, only can fall in the box body of sealing, one side is provided with the door of falling dirt in the bottom of box body, to outwell the dust in the box body, also be provided with a driven pulley concordant in the bottom of box body, to keep the brush body smooth working with driving wheel.

The utility model has the advantages that: 1. simple in structure, make easily, so cost is low, low price is easy to apply; 2. this brush can effectively be wiped the chalk writing on the blackboard, and not dirty hand, does not have dust from flying again, can effectively avoid the infringement of dust to Faculty and Students' health.

Introduce an embodiment below in conjunction with accompanying drawing:

Fig. 1 is an overall structure schematic diagram of the present utility model.

Fig. 2 is Fig. 1 left end internal structure schematic diagram.

Fig. 3 is Fig. 1 right-hand member internal structure schematic diagram.

With reference to accompanying drawing: in the closed cassette that handle [2] are arranged [1], bearing by the box body both sides is equipped with the surperficial cylinder [4] of felt [10] that is, the one end design of this cylinder has gear [8], the upper design of roller has circular arc plate washer [9], bristle brush wheel [5] and [6] have been designed respectively in the both sides of cylinder [4], design has the surface to be the driving wheel of rubber [3] between cylinder [4] and box plate, one end of driving wheel is provided with gear [7], gear [8] engagement with cylinder one end, driving wheel and cylinder surface all expose box plate, the other end at driving wheel [7] is provided with belt pulley [11], link to each other with the belt pulley of bristle brush wheel [5] and [6] one ends respectively by belt, side at box body [1] also is provided with ash door [12], also is provided with a passive driven pulley [13] on the base plate of box body [1].

Claims

1, a kind of dustproof blackboard brush, comprise box body [1], handle [2], felt calender [4], fall ash door [12], support wheel [13], it is characterized in that: the end design of felt calender [4] has gear [8], the both sides of cylinder are provided with bristle brush wheel [5] and [6], and the bristle of bristle brush wheel contacts with the felt of cylinder surface, be provided with driving wheel [3] between roller [4] and box plate, an end of driving wheel [3] is provided with gear [7], this gear and drum gear [8] engagement.

2, dustproof blackboard brush according to claim 1 is characterized in that: the top of cylinder [4] is provided with the plate washer [9] of circular arc, and the other end of driving wheel [3] is provided with belt pulley [11], links to each other with the belt pulley of bristle brush wheel [5] and [6] respectively by belt.