Movably combined blackboard

Abstract

The invention provides a movably combined blackboard which comprises a support and a blackboard unit, a driving unit and a wiping unit which are arranged on the support. The driving unit is provided with an upper driving shaft and a lower driving shaft, two ends of each driving shaft is provided with a driving sprocket, the driving sprockets correspondingly arranged on upper and lower ends of the driving shafts are surrounded with a driving chain, the blackboard unit is composed of a plurality of elongated plates different in size, the blackboard unit can be wound on the driving sprockets with the driving chain, and the driving sprockets drive the driving chain to rotate to drive the blackboard unit to rotate; the wiping unit is arranged behind the blackboard unit and is tightly attached to the blackboard unit, and when the blackboard rotates, the wiping unit can wipe off chalk handwriting on the blackboard unit. The chalk handwriting can be wiped off rotably, and semi-automatic operation is realized; the blackboard is of a hardness combination, and no discomfort occurs in writing; the movably combined blackboard is reasonable in overall structure, and the effect of chalk on teachers and students is greatly improved.

Description

technical field [0001] The invention belongs to the field of educational facilities, and in particular relates to a mobile combined blackboard. Background technique [0002] At this stage, although many classrooms have been equipped with multimedia equipment, teachers generally use electronic display and blackboard display in combination, so blackboards are still necessary, especially blackboards are indispensable in lower grade classrooms due to the need for blackboard writing. The traditional blackboard is fixed on the wall of the classroom, and the teacher writes on it with chalk, and then erases it with a blackboard eraser. During this process, a large amount of chalk dust is generated, which seriously affects the health of teachers and students. The Chinese patent (application number 201610985066.X) discloses a rotary erasing combined environmental protection blackboard. The technical solution adopted is to drive the belt-type blackboard to rotate through the rotating r...

AI Technical Summary

Problems solved by technology

The traditional blackboard is fixed on the wall of the classroom, and the teacher writes on it with chalk, and then erases it with a blackboard eraser. During this process, a large amount of chalk dust is generated, which seriously affects the health of teachers and students.

The Chinese patent (application number 201610985066.X) discloses a rotary erasing combined environmental protection blackboard. The technical solution adopted is to drive the belt-type blackboard to rotate through the rotating roller, and at the same time install and fix the outer wiper on the back of the belt-type blackboard. The blackboard is wiped. This kind of rotary wiping combined environmental protection blackboard has the following disadvantages: 1. The flexible belt blackboard is prone to cracks due to long-term attachment of dry matter such as chalk powder, which affects writing on it, and the belt blackboard is damaged. It is inconvenient to replace in the future, and it needs to be replaced as a whole, and the cost is high; 2. Since the flexible blackboard is used, writing on it will feel a little soft, which is worse than writing on a hard blackboard; 3. The fixed external wiper set at the rear requires the cooperation of the internal pressure roller to be in close contact with the belt-type blackboard, and the structure is complex

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