Patent ID: 7811020
Filing Date: 2010-10-12
Classification: B43K,G10D

Abstract:
1. A writing instrument, comprising: a grasp body being a hollow main body, comprising: a refill disposed into the grasp body, and a nib of the refill being protruding outside of the grasp body from the passing hole, wherein the first hollow tube body is attachable and detachable from the corresponding protrusion end of the second hollow tube body, wherein air is injected from the air inlet, such that some of the air is ejected to the outside of the second hollow tube body from the second air outlet and the rest of the air is guided to pass from the second hollow tube body to the first hollow tube body and then ejects from the first air outlets to outside of the first hollow tube body such that different tones are generated by covering the scale holes and the semitone holes.