Patent ID: 7128489

Claim:
A writing instrument, comprising: a sleeve-like housing; a reservoir axially extending in said housing; a push button positioned in a rear portion of said housing and mounted in said housing to be manually displaceable in a fashion to be secured against pivoting with said reservoir between a rear parking position and a front writing position and biased in the parking position by a force of a spring; a latching device for latching said push button in the writing position with a latch recess in said housing and a latch lug positioned at a free end of a transversely elastically bendable spring arm extending from said push button; a shift device for releasing said latching device and returning the latch lug into the parking position; and a support member positioned at said push button that includes a support surface that bars the latch lug by a stop from lateral movement into the latch recess when being moved back from a position moved forward beyond the latching position, wherein said support member is disposed at a peripheral wall portion of said push button, which is located radially outside a central free space of said push button, and wherein the peripheral wall portion protrudes radially inwards, another peripheral wall portion of said push button extending forward therefrom.