| 摘要 |
A light pen includes a case, a light source, a pen-nib structure, a first lens device, an elastic piece, a hollow knob, and a linkage pipe. The pen-nib structure is disposed through the case. The first lens device is disposed between the light source and the pen-nib structure. The elastic piece is connected to the first lens device. The hollow knob rotatably sheathes the first lens device. The linkage pipe sheathes the first lens device and is connected to the hollow knob for driving the elastic piece to move away from the pen-nib structure when the hollow knob rotates to a first position, so that the pen-nib structure can move relative to the case. The linkage pipe is further used for being separate from the elastic piece when the hollow knob rotates to a second position, so that the elastic piece can be engaged with the pen-nib structure. |
