Blackboard writing projection mechanism for teaching

Abstract

The invention discloses a blackboard writing projection mechanism for teaching. The blackboard writing projection mechanism comprises a blackboard writing projection plate (1), a background mechanism and a projector (2), wherein the background mechanism is arranged at the rear side of the blackboard writing projection plate (1) and close to the blackboard writing projection plate (1), the blackboard writing projection plate (1) is made of a transparent material, the background mechanism comprises a black movable background plate (3), a white movable background plate (4) and a black fixed background plate (5) which are orderly arranged at the rear side of the blackboard writing projection plate, the areas of the white movable background plate (4) and the black movable background plate (3) are the same, and the white movable background plate (4) and the black movable background plate (3) can move left and right under the driving of a power mechanism. Due to the adoption of the blackboard writing projection mechanism disclosed by the invention, the effective writing area can be increased, the position of the white movable background plate can be changed so that the people at different angles can clearly see the content of the projection, and the projection and the switching of the projection states can be realized.

Description

technical field [0001] The invention relates to the field of teaching tools, in particular to a blackboard projection mechanism for teaching. Background technique [0002] The blackboard used for teaching blackboard writing is indispensable in the classroom. For modern teaching, multimedia projection is naturally indispensable. Many classrooms use teaching equipment combining blackboards and projection screens, which not only meet the needs of teachers for blackboard writing, but also use projection equipment for projection teaching. In the prior art, the projection equipment includes a projector and a projection screen. The projection screen and the blackboard are generally installed on the wall in front of the classroom. However, due to the limited area of ​​the wall, the projection screen and the blackboard often overlap. Therefore, there are following technical problems in the blackboard projection equipment of the prior art: [0003] 1. The overlapping part of the pro...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a blackboard writing projection mechanism for teaching with large effective writing area and adjustable projection position, aiming at the problems existing in the above-mentioned prior art that the blackboard overlaps with the projection screen to reduce the effective writing area.

Images