| 摘要 |
A light-emitting pen is formed by a front pen tube, a rear pen tube and a middle ring. A metal cap at a lower end of a resisting element in the rear pen tube is in contact with or not in contact with the metal button at a top end of the light-emitting element and a metal conductive wire at the same time. Then a light-emitting body emits light or does not emit light or a filler will move upwards or downwards. Moreover, the light-emitting body and the filler can be controlled in four different stages.
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