A rolling automatic blackboard erasing device

Abstract

The invention discloses a rolling type automatic blackboard erasing device which comprises a blackboard body and supporting frame, a blackboard erasing device, a bevel gear transmission mechanism anda track cam transmission mechanism. The bevel gear transmission mechanism is installed on the side face of the blackboard body and supporting frame and is used for driving a batten board and fixed batten lining cloth in the blackboard body and supporting frame to move together; the track cam transmission mechanism is installed on the side face of the blackboard body and supporting frame and is used for achieving motion of a blackboard erasing pin roller in the blackboard erasing device, and the motion of the blackboard erasing pin roller is matched with motion of the batten board and the fixedbatten lining cloth to achieve erasing. By means of the rolling type automatic blackboard erasing device, multi-freedom-degree motion of the blackboard erasing pin roller is achieved, erasing achieves the best effect, and the automatic erasing effect is achieved; and powder formed during motion of the automatic blackboard erasing pin roller can be effectively controlled.

Description

technical field [0001] The invention relates to a rolling type automatic erasing blackboard device, which belongs to the field of teaching equipment. Background technique [0002] The classroom is the place where we study and live every day. We will have deep feelings for everything in the classroom, especially the blackboard that helps the teacher impart knowledge to us every day. However, this cannot cover up the lack of blackboard design. Most of the blackboard designs follow the rules and lack humanized design. In fact, whether the design of the blackboard is reasonable or not is an important factor related to the effect of teaching and learning. The wrong design of the blackboard or not Appropriate configuration has a non-negligible impact on the physical and mental health of teachers and students. When it comes to blackboards, we have to talk about chalk, but chalk powder is very harmful: [0003] 1. Harm to the lungs: After being inhaled into the lungs, it will be t...

AI Technical Summary

Problems solved by technology

[0003] 1. Harm to the lungs: After being inhaled into the lungs, it is blocked in the alveoli, leading to inflammation of the respiratory system and decreased pulmonary ventilation function

[0004] 2. Hazards to the upper respiratory tract: When chalk dust enters the lungs, part of the dust will stay in the upper respiratory tract, causing mechanical stimulation and damage to the mucosal epithelial cells

[0005] 3. Hazards to the eyes: Chalk dust falling into the eyes stimulates the secretion of lacrimal glands, tears hydrolyze carbonic acid to produce alkaline substances, cause mucous membrane damage, and form chronic inflammation

[0006] 3. Harm to the skin: It has a stimulating effect on the skin membrane. In severe cases, it will cause acne, folliculitis, pyoderma, chapped skin and a large amount of hair loss, which affects and interferes with the normal work and life of teachers.

[0007] 4. Harm to the ear: mixed with sebum, it can form earwax embolism. If it does so for a long time, it will cause ear inflammation.

[0009] The blackboard we use now cannot automatically erase the chalk powder. When the teacher is teaching, the students will inhale too much or too little chalk powder during the process of wiping the blackboard. This is unavoidable.

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