Push-pull blackboard for teaching

Abstract

The invention provides a push-pull blackboard for teaching. U-shaped guide rail grooves with openings opposite to each other are formed in the upper end and the lower end of a mounting frame, a fixedblackboard A, an interactive electronic whiteboard and a fixed blackboard B are fixedly connected to the mounting frame, a push-pull blackboard body is arranged between the upper U-shaped guide rail groove and the lower U-shaped guide rail groove, a strong magnet A is fixedly connected to the groove bottom of each U-shaped guide rail groove, strong magnets B are fixedly connected to the upper endand the lower end of the push-pull blackboard body, the polarities of the opposite ends of the strong magnet B on the upper portion of the push-pull blackboard body and the corresponding strong magnetA are the same, guide components cooperating with the strong magnets B are arranged on the two side walls of the U-shaped guide rail grooves, iron sliding portal frames are arranged on the outer surfaces of the fixed blackboard A, the fixed blackboard B and the push-pull blackboard body, and two long-strip-shaped through holes used for fixing a rubber brush head and a felt brush head are formed in the top face of each portal frame. According to the blackboard, smooth push and pull can be achieved, and the blackboard can be cleaned rapidly and thoroughly.

Description

technical field [0001] The invention relates to a push-pull blackboard for teaching, which belongs to the technical field of teaching equipment. Background technique [0002] The combined sliding blackboard for teaching is also called the composite sliding blackboard. This board is a new type of writing board that has been popular in schools around the world in recent years. After a long time, the ball track is easy to get stuck, and during the holiday, due to long-term use, the ball track is seriously dusted, and the balls will rust, which will affect the normal push and pull use of the blackboard. [0003] If the ball track is used, the chalk dust needs to be cleaned frequently, and the ball track needs to be lubricated regularly. However, after the lubricating oil is added, the chalk dust will stick to the surface of the lubricated moving parts, affecting the lubrication effect. In addition, most of the existing blackboard erasers are hand-held small blackboard erasers, ...

AI Technical Summary

Problems solved by technology

[0002] The combined sliding blackboard for teaching is also called the composite sliding blackboard. This board is a new type of writing board that has been popular in schools around the world in recent years. After a long time, the ball track is easy to get stuck, and during the holiday, due to long-term use, the ball track is seriously dusted, and the balls will rust, which will affect the normal push-pull use of the blackboard

[0003] If the ball track is used, the chalk dust needs to be cleaned frequently, and the ball track needs to be lubricated regularly. However, after the lubricating oil is added, the chalk dust will stick to the surface of the lubricated moving parts, affecting the lubrication effect

In addition, most of the existing blackboard erasers are hand-held small blackboard erasers, which are easy to lose, and it takes time and effort to wipe the blackboard

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