An automatic blackboard eraser mechanism for horizontal push-pull blackboard

Abstract

The invention discloses an automatic blackboard eraser mechanism for horizontal push-pull type blackboards and a use method of the automatic blackboard eraser mechanism. The automatic blackboard eraser mechanism comprises a fixed strip, a long rod, an M-shaped connecting rack, a baffle, a handle shaft, a handle, a long rotating shaft, a mounting bracket, a diagonal draw bar and a blackboard eraser, wherein a blackboard eraser structure is vertically fixed at the jointed part of two movable blackboards; the mounting bracket with shaft holes is fixed at the top and the bottom of a blackboard outer frame through rivets or nuts; the M-shaped connecting rack penetrates through the shaft holes of the mounting bracket and is fixed on the long shaft by the diagonal draw bar; the rotating handle is arranged at the middle of the M-shaped connecting rack at the bottom and can do up-down motion in a vertical plane around the handle shaft on the M-shaped connecting rack; meanwhile, the rotating handle can drive the M-shaped connecting rack to rotate leftwards and rightwards for attaching the blackboard eraser to the board surface; handwriting can be erased by pulling the blackboards. The automatic blackboard eraser mechanism and the use method disclosed by the invention are simple in design and are free from need of power; the erasing work of the blackboards is finished by using the moving inertia of the left-right push-pull type blackboards, and the erasing efficiency of the handwriting on the push-pull type blackboards is improved.

Description

technical field [0001] The invention relates to a teaching tool, in particular to an automatic blackboard eraser for a horizontal push-pull blackboard. Background technique [0002] The present invention originates from the modern horizontal push-pull large blackboard. At present, manual erasing is mainly done by hand-held blackboard erasers or rags. Since the area is much larger than that of traditional single-width blackboards, the workload of erasing all the blackboards is relatively large and occupies a large area. Class time is not conducive to the improvement of classroom teaching efficiency. In addition, the electric blackboards currently on the market are mainly designed for single blackboards, or are implemented with flexible blackboard surfaces, or implemented with electric blackboard erasers. The structure is relatively complicated and the cost is high. , and it is not suitable for horizontal push-pull large blackboards. Contents of the invention [0003] The i...

AI Technical Summary

Problems solved by technology

[0002] The present invention originates from the modern horizontal push-pull large blackboard. At present, handwriting eraser or rag is mainly used to complete handwriting erasing work. Since the area is much larger than the traditional single blackboard, the workload of erasing all the blackboards is relatively large, and it takes up Class time is not conducive to the improvement of classroom teaching efficiency. In addition, the current electric blackboards on the market are mainly designed for single blackboards, or are implemented with flexible blackboard surfaces, or implemented with electric blackboard erasers. The structure is relatively complicated and the cost is high. , and not suitable for horizontal push-pull large blackboard

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