Portable teaching blackboard convenient to use

Abstract

The invention discloses an easy-to-use portable blackboard for teaching, which comprises a first blackboard, a second blackboard and a third blackboard, the upper and lower sides of the second blackboard are provided with support plates, and the inside of the support plate is provided with a The first chute for three blackboards to slide, one side of the third blackboard is provided with a fixed block for fixing the blackboard, and the third blackboard is provided with a groove for fixing the first blackboard, and one side of the second blackboard passes through The slide block is slidably connected with the second chute on the rotating rod. In the present invention, the back of the second blackboard is rotatably connected to the connecting rod through the telescopic rod, and the bottom of the support rod is provided with a universal self-locking wheel for movement, so that the user can adjust to a suitable angle according to needs, and at the same time the universal self-locking wheel The wheels facilitate the movement of the blackboard, so during teaching, teachers can move the blackboard freely according to the needs of the classroom, which is more in line with the new teaching method advocated now.

Description

technical field [0001] The invention relates to the technical field of teaching, in particular to an easy-to-use portable blackboard for teaching. Background technique [0002] The blackboard does not specifically refer to the black board surface. In the traditional sense, it is a plane that can be repeatedly written with chalk. The board surface is hard and is mostly used for teaching. Blackboards are generally made of wood or frosted glass. Writing material to write on. Most of them are black, dark green, white or beige. Before the invention of writing, people found that charcoal can be used for painting. Some ancient murals can be found in some ancient caves in Europe. The rock walls painted with these murals have traditionally been It can be called a blackboard. Ancient Chinese teaching often used an object called a sand table, which was repeatedly written on the sand with hardwood, but because of the softness of the sand, it cannot be regarded as a blackboard. [0003...

AI Technical Summary

Problems solved by technology

Most of them are black, dark green, white or beige. Before the invention of writing, people found that charcoal can be used for painting. Some ancient murals can be found in some ancient caves in Europe. The rock walls painted with these murals have traditionally been It can be called a blackboard. Ancient Chinese teaching often used a kind of object called a sand table, which was repeatedly written on the sand with hard wood, but because of the softness of the sand, it cannot be regarded as a blackboard.

[0003] Yet existing teaching blackboard also has some weak points, such as the size of the existing teaching blackboard is basically all fixed, so it is not convenient for the new teaching method of existing advocacy, next is exactly, existing The teaching board takes up a lot of space, and it cannot be put away when not in use, so it takes up a lot of space

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