Multifunctional three-face turning blackboard based on cam intermittence motion mechanism

An existing classroom is insufficient in presentation space, and interference problems can be easily formed; the invention aims at the problems, and provides a novel multifunctional three-face turning blackboard with simple structure and capable of realizing triangular prism surface intermittence motions while ensuring flatness; the blackboard can realize writing presentation comprising a white board and the blackboard, and can realize multimedia display like an LED, a liquid crystal screen and curtain; the multifunctional three-face turning blackboard takes the cam intermittence motion mechanism, a torsion spring transmission mechanism and an intermittence prop mechanism as the cores; the cam mechanism comprises a cam dial and a cam triangle connected with a torsion spring coupling mechanism through a transmission shaft, thus realizing flexible transmission; the intermittence prop mechanism comprises a cam dial, a pressure spring and a prop; the prop is intermittently pushed and returned by a secondary cam on the cam dial, thus realizing triangular prism intermittence locking and loosening; the multifunctional three-face turning blackboard is simple in structure, can ensure the flatness of the blackboard surface, and the triangular prism application can realize multifunctional display effect.