Knock-type writing instrument

Abstract

To provide a clicking type writing instrument capable of reliably suppressing volatilization of ink from the pen tip at least before the start of use. The clicking type writing instrument A has a refill 20 provided in a barrel cylinder 10; a pen tip 30 configured to discharge ink from an ink storage member 18 accommodated in the refill 20 by capillary action and to be allowed to be projected from and retracted into a front end of the barrel cylinder 10 by means of a clicking mechanism 70 provided in the barrel cylinder 10; and at least a seal member 40, arranged around an outer periphery of the pen tip 30 near a front end side of the pen tip, and formed with a through-hole 42 in a center of the seal member, through which the pen tip 30 can slidably move back and forth when the pen tip 30 is housed inside the barrel cylinder 10.

Dependencies are inferred from the claim text.