A teaching data recording device
A technology of data recording and movable cavity, applied in the field of teaching aids, can solve the problems of easily damaged large screen, difficult to move, and inconvenient to use the device, and achieves the effect of lowering the overall center of gravity, moving stably, and improving practicability
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[0039] like Figure 1-23 As shown, a teaching data recording device includes a base 1, a first support arm 2 disposed on the base 1, a second support arm 3 disposed on the first support arm 2, and a second support arm 3 disposed on the first support arm 2. The display screen 4 on the two support arms 3, the described display screen is an LED display screen, and a single-chip microcomputer is set inside, which can be used to automatically record teaching data or score situation, and the base 1 is provided with a first movable groove 11, and the second One end of a support arm 2 is rotatably connected to the first movable groove 11, the second support arm 3 is rotatably connected to the other end of the first support arm 2, and the top of the second support arm 3 is provided with a second Two movable grooves, a rotating roller is rotatably connected in the second movable groove, a first connecting block is arranged on the rotating roller, and the display screen 4 is arranged on ...
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