Scroll-type blackboard

Abstract

A reel-type blackboard is vertically arranged on two brackets on the wall, and a winding motor and a reel are respectively arranged horizontally on the upper and lower parts of the two brackets. Each winding motor is respectively engaged with the reel through a clutch. A writing carrier surface that can be curled up or down is set between the two reels, and a tension roller is horizontally set on the upper and lower parts of the writing carrier surface, and an electromagnetic coil is fixed on each clutch gear. , power supply——the left upper roll key switch——the crimping motor on the upper part of the support is electrically connected, and an electromagnetic coil is connected in parallel on the crimping motor. It can replace the traditional hard blackboard, increase the writing area, roll the written picture onto the scroll, and there will be a new blank board, which will not affect the blackboard occupied by the teacher in the next class, and can also return to the previous board, so that students Finding information after reviewing after class has greatly solved the problem of insufficient blackboard space.

Description

technical field [0001] The invention belongs to the teaching field, in particular to a scroll-type blackboard. Background technique [0002] The traditional blackboard is a hard board, which is hung on a wall in the classroom. The area of ​​the blackboard cannot be larger than the area of ​​the wall. When the blackboard area is full, it must be erased and rewritten. Blackboard, sometimes when this class needs to review the content and materials of the previous class, the data on the blackboard of the previous class has been covered by the data of the previous class, which brings great inconvenience to teachers and students. Contents of the invention [0003] The purpose of the present invention is to provide a roll-type blackboard that can be rolled up and down, the writing area can be doubled, and can be returned to the front board to allow students to review and find materials after class. [0004] The technical scheme adopted in the present invention is: [0005] A sc...

AI Technical Summary

Problems solved by technology

[0002] The traditional blackboard is a hard board, which is hung on a wall in the classroom. The area of ​​the blackboard cannot be larger than the area of ​​the wall. When the blackboard area is full, it must be erased and rewritten. Blackboard, sometimes when this class needs to review the content and materials of the previous class, the data on the blackboard of the previous class has been covered by the data of the previous class, which brings great inconvenience to teachers and students

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