Abstract: Provided is a light pen comprising an elastic ejection assembly. In a retracting operation of the light pen, pressing a pushing rod into a barrel will move a pushing cylinder to compress a spring, push first teeth out of first grooves, clockwise turn the first teeth to move from the first groove to adjacent second groove, and cause a pilot bar to jump a pitch to completely conceal the light pen in a receptacle of an electronic device In an extending operation of the light pen, pressing the pushing rod again will clockwise turn the first teeth to move from the second groove to the adjacent first groove to cause the pilot bar to jump another pitch, and release a stored elastic force of the spring to push the pushing rod partially out of the receptacle.

Abstract: Provided is a light pen comprising an elastic ejection assembly. In a retracting operation of the light pen, pressing a pushing rod into a barrel will move a pushing cylinder to compress a spring, push first teeth out of first grooves, clockwise turn the first teeth to move from the first groove to adjacent second groove, and cause a pilot bar to jump a pitch to completely conceal the light pen in a receptacle of an electronic device In an extending operation of the light pen, pressing the pushing rod again will clockwise turn the first teeth to move from the second groove to the adjacent first groove to cause the pilot bar to jump another pitch, and release a stored elastic force of the spring to push the pushing rod partially out of the receptacle.