Importance

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Abstract

The subject of the invention is to provide a knock-type writing instrument in which a cloth can be prevented from being stained by the clip releasing mechanism having a compact structure when the writing instrument is stored in a pocket and further the writing extremity end can be prevented from being damaged under the projected state by an unintended use of it. The window hole is formed at the peripheral surface of the barrel, the ball section of the clip is provided with the inner protrusions which can be extended or retracted into said window hole, the rotor is provided with a plurality of peripheral protrusions at the outer peripheral surface in a circumferential direction so as to stop the rotor by being abutted against said inner protrusions of the clip when said extremity end is projected, the inner protrusions of the clip are moved toward an outer side of the shaft as the clip is opened when said extremity end is projected, resulting in that the protrusions are not abutted against the peripheral protrusions of the rotor and then the rotor is rotated to cause the writing extremity end to be retracted into the barrel.

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First Claim