CN202319605U - Detachable chalkboard eraser - Google Patents

Abstract

The utility model belongs to teaching tools, in particular to a detachable chalk eraser. It includes a box body (1) with an opening on one side, a base (2) and bristles (3) fixed on the base (2), a groove (4) is arranged on the side of the opening of the box body (1), and the concave The width (c) of the groove (4) is equal to the thickness (h) of the base (2). The utility model has the advantages of simple structure and convenient use.

Description

A removable chalk eraser

technical field

The utility model relates to a chalk eraser, in particular to a detachable chalk eraser.

Background technique

As we all know, after the teacher writes with chalk on the blackboard, he will wipe the blackboard with a chalk eraser, and a large amount of chalk dust will fly, especially the chalk eraser that has been used for a long time has accumulated a large amount of chalk dust. We often tap the chalk eraser to remove the chalk dust accumulated on it, but class time is more precious, especially when teaching to a certain level, there is no time and place to knock off the chalk dust.

Utility model content

The purpose of this utility model is to solve the above-mentioned technical problems, and provide a kind of chalk eraser that can detach bristles at any time.

The solution of the utility model to solve the technical problem is: a detachable chalk eraser, comprising a box body with one side open, a base and bristles fixed on the base, grooves are arranged on one side of the box body opening, the The width of the groove is equal to the thickness of the base.

As a further technical solution, it also includes a limiting device, and the limiting device includes a rotating shaft and a stopper. The stopper is rotatably connected with the rotating shaft.

The base with bristles can be inserted into the groove of the box body, and then the base is fixed with a stopper, so that we can replace the bristles when needed.

In summary, the utility model has the advantages of simple structure and convenient use.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the explosion structure of the utility model.

In the figure: 1-box body, 2-base, 3-bristle, 4-groove, 5-limiting device, 51-rotation shaft, 52-block, c-width, h-thickness.

Detailed ways

Example 1

As shown in Figures 1 and 2, a detachable chalk eraser includes a box body 1 with an opening on one side, a base 2 and bristles 3 fixed on the base 2, and grooves 4 are arranged on one side of the opening of the box body 1 , the width c of the groove 4 is equal to the thickness h of the base 2 , and a limiting device 5 is fixedly connected to the upper end of the box body 1 , and the limiting device 5 includes a rotating shaft 51 and a stopper 52 . The block 52 can freely rotate around the rotating shaft 51 .

When the user wants to change the bristle 3, first turn the stopper 52, take out the old bristle 3, then insert the new bristle 3 into the groove 4 of the box body 1, and finally turn the stopper 52 to block the base 2, so that It cannot be moved out.

Claims (3)

1. A detachable chalk eraser, comprising an open box (1), a base (2) and a bristle (3) fixed on the base (2), characterized in that: the box (1) is open A groove (4) is arranged on one side of the groove, and the width (c) of the groove (4) is equal to the thickness (h) of the base (2). 2. A detachable chalk eraser according to claim 1, characterized in that: it also includes a limiting device (5). 3. A detachable chalk eraser according to claim 2, characterized in that: the limiting device (5) comprises a rotating shaft (51) and a stopper (52).

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