CN201703143U

CN201703143U - Dust-proof eraser

Info

Publication number: CN201703143U
Application number: CN2010202391647U
Authority: CN
Inventors: 孙常凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-28
Filing date: 2010-06-28
Publication date: 2011-01-12
Anticipated expiration: 2020-06-28

Abstract

The utility model relates to a dust-proof eraser which belongs to the field of teaching tools and mainly solves the problem that chalk dust produced when a blackboard is erased is harmful to the health of teachers and students. The eraser comprises a shell body, a carpet surface, multiple layers of sponges and a rubber scraper, and is characterized in that the carpet surface is arranged in the center of the bottom of the shell body, a plurality of layers of sponges are arranged around the carpet surface, and the rubber scraper is arranged on the periphery of the bottom of the shell body. The carpet surface is a little protruded to the multiple layers of sponges, and the adjacent layers of sponges are separated by spacing. The dust-proof erase does not need to use any power supply, has small size, can collect the chalk dust into the sponges when the blackboard is erased, thereby preventing the chalk dust flying around from affecting the physical health of the teachers and the students.

Description

A kind of dust-proof blackboard eraser

Technical field

The utility model relates to a kind of educational aid, specifically a kind of blackboard eraser.

Background technology

Blackboard eraser is one of instrument commonly used in the education activities, but existing blackboard eraser is when erasing the board, and chalk dust can waft to such an extent that be everywhere, is unfavorable for the healthy of teacher and student.

The utility model content

The purpose of this utility model is to provide a kind of dust-proof blackboard eraser, mainly solves the chalk dust problem harmful to the health of teacher and student that produces when erasing the board.

The technical scheme in the invention for solving the technical problem is: a kind of dust-proof blackboard eraser, its structure comprises housing, felt face, multilayer sponge and rubber flap, described felt face is positioned at the center of housing bottom, the multilayer sponge be centered around the felt face around, rubber flap is located at the periphery of housing bottom.The felt face protrudes from the multilayer sponge slightly.Gapped separating between the adjacent layer of multilayer sponge.

The beneficial effects of the utility model are: blackboard eraser of the present utility model need not to use power supply, and volume is small and exquisite, chalk dust can be collected in the sponge when erasing the board, and the chalk dust of avoiding waving everywhere influences the healthy of teacher and student.

Description of drawings

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

Fig. 2 is the cutaway view of Fig. 1;

Among the figure: 1 rubber flap, 2 multilayer sponges, 3 felt faces, 4 housings.

The specific embodiment

As Fig. 1 or shown in Figure 2.A kind of dust-proof blackboard eraser comprises housing 4, felt face 3, multilayer sponge 2 and rubber flap 1, and described felt face 3 is positioned at the center of housing 4 bottoms, multilayer sponge 2 be centered around felt face 3 around, rubber flap 1 is located at the periphery of housing 4 bottoms.Felt face 3 protrudes from multilayer sponge 2 slightly.Gapped separating between the adjacent layer of multilayer sponge 2.During use, felt face 3 can be wiped down the chalk dust on the blackboard, and the chalk dust that falls is adsorbed in the middle of the space of multilayer sponge 2, can hold more chalk dust in the separate space between the adjacent multilayer sponge 2.Rubber flap 1 can be close to when blackboard eraser uses on the surface of blackboard, and the environment and the external world that felt face 3 is erased the board separate, and have avoided overflowing of chalk dust.

Claims

1. a dust-proof blackboard eraser is characterized in that, comprises housing, felt face, multilayer sponge and rubber flap, and described felt face is positioned at the center of housing bottom, the multilayer sponge be centered around the felt face around, rubber flap is located at the periphery of housing bottom.

2. a kind of dust-proof blackboard eraser according to claim 1 is characterized in that, described felt face protrudes from the multilayer sponge slightly, gapped separating between the adjacent layer of multilayer sponge.