Blackboard for teaching

Abstract

The invention relates to a blackboard for teaching. The blackboard comprises a support provided with a main board and an auxiliary board, wherein a guide slot is formed in the support and comprises a main linear guide slot section extending in the left-right direction, and an oblique guide slot section which is arranged at the right end of the main linear guide slot section and extends forwards gradually from left to right, and an auxiliary board right traveling wheel and an auxiliary board left traveling wheel are arranged on the auxiliary board; the length of the main linear guide slot section is larger than the distance between the auxiliary board right traveling wheel and the auxiliary board left traveling wheel, a right traveling wheel passing slot only allowing the auxiliary board right traveling wheel to pass in the left-right direction is formed in the right slot wall of the oblique guide slot section, and the auxiliary board left traveling wheel is movably matched with an arc-shaped guide slot in a guided mode when the auxiliary board moves rightwards so that the auxiliary board can move forwards to a position where the front surface of the auxiliary board is flush with the front surface of the main board. According to the blackboard for teaching, the main board can be flush with the auxiliary board.

Description

technical field [0001] The invention relates to a blackboard for teaching. Background technique [0002] The blackboard is a must in the teaching of various majors. In the actual use process, it is often encountered that the usable area of ​​a blackboard is limited and not enough. Therefore, how to increase the usable area of ​​the blackboard has become an urgent problem to be solved. [0003] For this reason, Chinese patent CN204010409U discloses a "tourism management professional teaching display board" that can expand the display area of ​​the blackboard. The teaching display board includes a bracket, a main board, and a sub-board, and a guiding direction is arranged on the rear side of the main board to be parallel to the main board. The bottom of the sub-board is provided with the left travel wheel of the sub-board and the right travel wheel of the sub-board to cooperate with the guide rail. Through the cooperation of the travel wheel and the guide rail, the sub-board c...

AI Technical Summary

Problems solved by technology

The existing problem of this blackboard is: after the sub-board is removed from the rear side of the main board, the front board of the main board and the front board of the sub-board are not in the same plane, and due to the limitation of the guide rail, the front board of the sub-board is in the same plane. The rear side of the front panel of the main board will bring a sense of dislocation to the students' vision, which is very uncomfortable. In addition, if the drawing is large as shown in the figure, the sub-board can not play the role of supporting the main board, which is very inconvenient to use

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