CN201784359U - Blackboard eraser for two purposes of dry and wet uses - Google Patents

Abstract

The utility model discloses a blackboard eraser for two purposes of dry and wet uses, which belongs to a teaching tool, and is mainly used for solving the problem of flying dust caused during the use of the blackboard eraser in the prior art. The eraser comprises the body of the blackboard eraser, and the body of the blackboard eraser comprises a dry side and a wet side. An insulation layer is arranged between the dry side and the wet side, the dry side is the area of bristles, while the wet side is the area of the sponge. The utility model has simple structure and manufacturing process, low cost, safe and convenient use, solves technical problems of the inconvenience of alternatively using the dry eraser and the wet eraser during erasing the blackboard, flying dust, and harm to the health of teachers and students.

Description

A kind of Wet-dry blackboard eraser

Technical field

The utility model relates to a kind of teaching aid, specifically is a kind of Wet-dry blackboard eraser.

Background technology

Class hour on to the student, teacher can erase the board every now and then, following class hour, the student on duty classmate also will erase the board, chalk powder will drop on one after another teacher and classmates on hand and on one's body, the dust that flies upward also can be inhaled in the lung, because the specific physical performance of chalk, this can cause very big injury to health, the pneumoconiosis and the various acute and chronic breathing problem that cause as dust, dust can also bring out other disease to the injury of eyes, ear, skin, to the influence of air quality and to influence of myopia or the like.So according to the different air ambient conditions and the type of blackboard and chalk, sometimes need to use dried, wet two kinds of different blackboard erasers to carry out work, change blackboard eraser so continually and just seem very inconvenient, waste time and energy, if a kind of Wet-dry blackboard eraser can be arranged, will be useful especially to teacher and classmates' physical and mental health.

The utility model content

The purpose of this utility model is to provide a kind of Wet-dry blackboard eraser, and this blackboard eraser can be selected dry type or two kinds of different blackboard erasers of wet type in use as required arbitrarily for use.

The technical scheme in the invention for solving the technical problem is: a kind of Wet-dry blackboard eraser, comprise the blackboard eraser body, described blackboard eraser body comprises xerotripsis face and wet rubbing face, be provided with interlayer in the middle of described xerotripsis face and the wet rubbing face, described xerotripsis face is a hair brush area, and described wet rubbing face is the sponge district.

The beneficial effects of the utility model are: structure, make simple, with low cost, safe and convenient to use, solved when erasing the board do, the inconvenience when wet blackboard eraser is used alternatingly and dust from flying, the able-bodied technical problem of harm Faculty and Students.

Description of drawings

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

Among the figure: 1 xerotripsis face, 2 wet rubbing faces, 3 interlayers.

The specific embodiment

As shown in Figure 1.A kind of Wet-dry blackboard eraser comprises the blackboard eraser body, and described blackboard eraser body comprises xerotripsis face 1 and wet rubbing face 2, be provided with interlayer 3 in the middle of described xerotripsis face 1 and the wet rubbing face 2, be mutual isolation, described xerotripsis face 1 is a hair brush area, and described wet rubbing face 2 is the sponge district.

During use, make sponge keep moistening shape behind the water a little at zona spongiosa, and then according to using needs to select hair brush area or zona spongiosa arbitrarily for use.

The utility model structure, make simple, with low cost, safe and convenient to use, solved when erasing the board do, the inconvenience when wet blackboard eraser is used alternatingly and dust from flying, the able-bodied technical problem of harm Faculty and Students.

Claims (1)

1. a Wet-dry blackboard eraser comprises the blackboard eraser body, it is characterized in that, described blackboard eraser body comprises xerotripsis face and wet rubbing face, is provided with interlayer in the middle of described xerotripsis face and the wet rubbing face, and described xerotripsis face is a hair brush area, and described wet rubbing face is the sponge district.

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