Importance

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Abstract

A knock-type writing instrument including a refill, an outer tube housing the refill, a refill moving mechanism allows movement of the refill between a projecting state in which a front end of the refill projects from the outer tube and a housed state in which the front end of the refill is housed in the outer tube, an opening and closing device disposed in the outer tube and provided with an opening and closing port, and a release device provided at a front-side opening end of the outer tube. By the opening and closing device abutting against the release device, the opening and closing port assumes an open state in which the refill can pass therethrough. By the opening and closing device moving away from the release device, the opening and closing port assumes a closed state.

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First Claim