CN202242572U - Combined blackboard capable of automatically erasing characters - Google Patents

Abstract

The utility model relates to a teaching article, in particular to a blackboard for automatically erasing characters. A combined blackboard for automatic word erasing, in which a cleaning block is arranged on the back of the blackboard, and the combined blackboard is a lift-type blackboard with forward and backward transposition. In the blackboard of the utility model, when it is necessary to change the board after writing a word, the blackboard with characters is pushed up, and the blackboard without characters is pulled down. The words on the blackboard are erased, so that the teacher's workload is reduced, time is saved, and the harm caused by chalk dust to the body when the blackboard is wiped can be reduced.

Description

Combination blackboard with automatic erasing

technical field

The utility model relates to a teaching article, in particular to a blackboard for automatically erasing characters.

Background technique

At present, most of the lifting combination blackboards in school classrooms need to be wiped by students or teachers after writing, which brings a certain degree of inconvenience to teaching and learning activities, because teachers have to work hard to write. Sometimes it has to be erased by teachers or students after writing. Not only trouble, waste of time, pollute environment, and chalk dust may cause harm to a certain degree to health.

Contents of the invention

In order to make up for the defects of the existing lift-type combined blackboard, the utility model provides a lift-type combined blackboard capable of automatically erasing characters.

The technical scheme adopted by the utility model to solve the technical problem is: a combined blackboard for automatic character erasing, characterized in that a cleaning block is arranged on the back of the blackboard.

The combined blackboard is a lift-type blackboard with forward and backward transposition.

In the blackboard of the utility model, when it is necessary to change the board after writing a word, the blackboard with characters is pushed up, and the blackboard without characters is pulled down. Word erasing; when the blackboard with no words moves to the bottom, the two blackboards are transposed front and back, and the blackboard originally located at the back is changed to the front, that is, the blackboard currently written is always at the front. In this way, when the two blacks are transposed up and down, the cleaning block on the back of the front blackboard can erase the words on the back blackboard, thus reducing the teacher's workload, saving time, and reducing chalk when wiping the blackboard. Hazards caused by dust to the body.

Description of drawings

Fig. 1 is the front structure drawing of the utility model lifting type combined blackboard;

Fig. 2 is the back structure diagram of the utility model lifting type combination blackboard;

In the figure: 1 blackboard; 2 blackboard; 3 cleaning block.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the lifting type combined blackboard of the utility model is introduced in detail.

As shown in Figure 1, a kind of lift-type combination blackboard of automatic wiping character, comprises blackboard 1 and blackboard 2 movable up and down, is provided with cleaning block 3 at the back side of blackboard 1, blackboard 2, as shown in Figure 2.

The lifting type combined blackboard of the utility model automatically erases characters. In the initial state, the upper blackboard 1 is located at the back, and the lower blackboard 2 is located at the front; The lower blackboard 1 is at the front, that is, the current writing blackboard is always at the front, and the other blackboard is always at the back.

The working principle of the lifting type combination blackboard with automatic character erasing of the utility model is: when the blackboard 2 is full of words and needs to be replaced, the blackboard 1 is pulled down and the blackboard 2 is pushed up; when the blackboard 1 is full, it needs to be replaced When using the blackboard 2, pull down the blackboard 2. During the cross movement of the blackboard 1 and the blackboard 2, the cleaning block 3 located on the back of the blackboard 1 can erase the words on the blackboard 2; when changing the board again, it is located on the back of the blackboard 2 The cleaning block 3 can erase the words on the blackboard 1. In this way, the teacher does not need to wipe the blackboard during the lecture, which saves time and reduces the harm of chalk dust to the body. In addition, because the cleaning block is located on the back of the blackboard, the blackboard can prevent chalk dust from flying around when erasing words automatically, which has certain advantages. Environmental protection effect.

Claims (1)

1. A combination blackboard for automatic word erasing, characterized in that: a cleaning block is arranged on the back side of the blackboard; the combination blackboard is a lift-type combination blackboard; the lift-type combination blackboard is a lift-type combination of transposition blackboard.

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