CN2138578Y

CN2138578Y - Blackboard eraser for reducing dust pollution

Info

Publication number: CN2138578Y
Application number: CN 92205631
Authority: CN
Inventors: 侯洪生; 刘力平
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-28
Filing date: 1992-03-28
Publication date: 1993-07-21
Anticipated expiration: 2002-03-28

Abstract

The utility model relates to a blackboard eraser for reducing dust pollution, mainly comprising a brush body and brushes, wherein, the brush body has an upper brush body and a lower brush body which are combined to form a brush body cavity, the upper brush body is provided with a felt brush and a circular brush which is supported by a limit stop with springs and can rotate, and a handle is arranged on the brush body. The utility model has the advantages that erased chalk dust can be rolled into the brush body cavity through the circular brush to obviously reduce chalk dust pollution when the brush is used to erase a blackboard, a structure is simple, manufacture is easy, materials are ordinary, and a dust reducing effect is achieved without any dynamic force.

Description

Blackboard eraser for reducing dust pollution

Reduce the dust pollution blackboard brush and belong to a kind of teaching aid.

Existing blackboard brush is formed by brush body and brush, and brush body is a tabular, and brush adopts materials such as felt or hair to be fixed on the brush body.Its advantage is single between structure, price is low, but its shortcoming is this blackboard brush pick-up performance extreme difference, during use, dust flies upward everywhere, and contaminated environment not only makes user's hand, clothes be stained with dust, the dust that a part is flown upward also can be inhaled in the body, be engaged in teaching all the year round teacher healthy of work of influence.

The purpose of this utility model is to design a kind of blackboard brush that reduces dust pollution, it can be reached clean, and structure is fairly simple again, obviously reduces the effect of dust from flying when using.

Above-mentioned purpose of the present utility model reaches by such scheme: reduce the dust pollution blackboard brush and mainly be made up of brush body and brush, its special character is brush body and following brush body two body structures, form the brush body cavity after last brush body and the following brush body secure bond, last brush body is equipped with felt brush and circle hairbrush, and following brush body is provided with handle.

The felt brush can be strip, and it can adopt dovetail groove to combine with last brush body, and circle hairbrush two ends are roller shaft, can be supported in the circular groove at brush body two ends by the jacking block that spring is housed in the following brush body, and the circle hairbrush is rotatable.

Can be provided with through hole in the handle, this through hole communicates with the brush body cavity, and handle end is a port lid.

Fig. 1 is for reducing dust pollution blackboard brush structure chart;

Fig. 2-the 5th, exploded view of the present utility model.

1 is felt among the figure, and 2 is last brush body, and 3 are the circle hairbrush, 4 roller shafts for circle hairbrush two ends, 5 be jacking block, 6 be spring, 7 be under brush body.

The utlity model has following advantage: felt adopts live body to connect, when use may wear to can not the time spent, can put just and change, unlikely whole blackboard brush is thrown away, to cut the waste. Particularly on the upper brush body of the present utility model round hairbrush is housed, and is provided with the brush body cavity. When erasing the board with this blackboard brush, can by the rotation of circle hairbrush, most dust be involved in the brush body cavity, thereby obviously reduce dust to the pollution of environment by the chalk dust under the felt wiping. Owing at brush body handle is housed, not only bring convenience for holding blackboard brush simultaneously, and can solve dust shallow fall on hand with coat-sleeve on. When dust amassed to a certain degree, the end cap that can open on the handle was outwelled dust. The circle hairbrush adopts the jacking block with spring to support, and purpose is to guarantee circle hairbrush and blackboard good contact, exactly in the situation that felt is worn, can guarantee that also contact is good, appropriate, to reach the purpose of collecting dust.

The utility model is from practical standpoint, though slightly more complicated than existing blackboard brush, can substantially solve the dust pollution question that has blackboard brush now, it does not need to add any dust suction power, and have simple in structure, the advantage such as handling ease, material are common.

Below in conjunction with accompanying drawing enumeration the utility model content and embodiment:

In the present embodiment, felt 1 adopts strip, and last brush body 2 upper surfaces have two dovetail grooves, and felt 1 can insert along dovetail groove and be contained on the brush body 2.Middle opening on the last brush body is for dress circle hairbrush 3 usefulness.Following brush body 7 is the casing of an opening, supports two jacking blocks 5 by two springs 6 in the casing, has half slot on the jacking block 5, and is corresponding with the half slot at last brush 2 two ends.Last brush body 2 can adopt to be pressed into following brush body 7 and cooperate, and forms the brush body cavity.Circle hairbrush 3 two ends are roller shaft 4, it is the central closing that is supported on brush body 2 by the half slot of the half slot at last brush body 2 two ends and the jacking block 5 on the following brush body 7, circle hairbrush 3 can rotate, following brush body 7 is provided with handle, establish through hole in the handle, and communicate with cavity in the brush body, handle end is an end cap.

Claims

1, reduce the dust pollution blackboard brush, mainly be made up of brush body and brush, it is characterized in that brush body is last brush body and following brush body two body structures, form the brush body cavity after last brush body and the following brush body secure bond, last brush body is equipped with felt brush and circle hairbrush, and following brush body is provided with handle.

2, minimizing dust pollution blackboard brush according to claim 1, it is characterized in that the felt brush is strip, it adopts dovetail groove to combine with last brush body, and circle hairbrush two ends are roller shaft, be supported in the circular groove at brush body two ends by the jacking block that spring is housed in the following brush body, the circle hairbrush is rotatable.

3, minimizing dust pollution blackboard brush according to claim 1 and 2 is characterized in that being provided with in the handle through hole, and this through hole communicates with the brush body cavity, and handle end is a port lid.