Scroll-type Chinese teaching blackboard

Abstract

A scroll-type Chinese teaching blackboard involved in the present invention includes a frame and a left scroll, the left scroll is arranged on the left side of the frame surface, and a right scroll is arranged on the right side of the frame surface, and the left scroll and the right scroll A writing surface is provided between them, and a left motor and a right motor are respectively provided on the top of the left reel and the right reel, and the left motor and the right motor are connected by wires, and a controller is provided on the wires, and the There is also a plug at one end of the electric wire, and the electric wire connects the controller to the left motor and the right motor, and the controller is arranged on the surface of the frame, and the back side of the writing surface is provided with a substrate, and the substrate The top is provided with an upper baffle, the bottom of the base plate is provided with a lower baffle, and the top of the lower baffle is provided with a dust accumulation groove on the top. The motor drives the rotating shaft to increase the writing surface of the blackboard, and the sliding blackboard eraser can be used once. It can clean the blackboard efficiently, and can effectively prevent chalk dust, which is very practical.

Description

technical field [0001] The invention relates to a scroll-type Chinese teaching blackboard, which belongs to the field of teaching equipment. Background technique [0002] In the Middle Ages, people discovered that lime was mixed with water to make blocks, and they used a method similar to charcoal pens to write on the surface of dark, hard objects. In the 19th century, people used black lacquer to coat the surface of wooden boards to protect them from erosion. Of course, the main function of the blackboard at that time was not teaching. It was not until the middle of the 19th century that it became popular in schools all over the world. For more than two hundred years, the blackboard was first painted with black paint on the surface of wood, cement and other hard objects, until the 1990s. High-quality terrazzo glass, color-coated steel plates, and composite material plates have witnessed the step-by-step development of world education. Blackboards, green boards, and whitebo...

AI Technical Summary

Problems solved by technology

[0002] In the Middle Ages, people discovered that lime was mixed with water to make blocks, and they used a method similar to charcoal pens to write on the surface of dark, hard objects. In the 19th century, people used black lacquer to coat the surface of wooden boards to protect them from erosion. Of course, the main function of the blackboard at that time was not teaching. It was not until the middle of the 19th century that it became popular in schools all over the world. For more than two hundred years, the blackboard was first painted with black paint on the surface of wood, cement and other hard objects, until the 1990s. High-quality terrazzo glass, color-coated steel plates, and composite material plates have witnessed the step-by-step development of world education. Blackboards, green boards, and whiteboards can be divided into flat panels and arc panels in terms of surface shape; bracket movable panels, push-pull panels, lifting panels, magnetic blackboards in terms of structural composition, and teaching blackboards, office whiteboards, and advertising panels in terms of usage. , the display board and the teaching blackboard also have an electronic blackboard, a multi-functional combination board, a combination push-pull blackboard, an interactive electronic whiteboard, a projection board with a screen, etc. The board does not specifically refer to a black board. In the traditional sense, it is a board that can be repeated. The writing surface is hard and mostly used for teaching. It is made of wood or frosted glass. You can use specific writing materials such as chalk to write on it. Most of them are black, dark green, white or beige. The existing blackboard The area is fixed. When one side of the blackboard is finished writing, it will re-erase the written content on the blackboard and continue writing. This will waste a lot of teaching time for the teacher. Moreover, when the blackboard is wiped, chalk dust will fly everywhere, seriously affecting teachers. Healthy, and the traditional blackboard sassafras is a waste of time when wiping the blackboard, so further improvement is needed

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