Abstract: A writing instrument has a cam rotatably connected to a rear end of a main body so that rotation of the cam in opposite directions within a predetermined range advances and retracts a refill housed in the main body. A sealing section seals the front end of the refill when it is fully retracted in the main body. The outer configurations of the main body and the working cam have a generally regular triangle shape in cross section, and the outer configurations are coincident with each other at the position where rotation of the working cam starts and are rotationally shifted relative to one another when the working cam is rotated, whereby the rotation state of the working cam can be discerned by the coincidence or non-coincidence of the outer configurations.

Abstract: Provided is a capacitive stylus which has, at the tip, an electrically conductive pad that has been made less deformable and that recovers the original shape immediately when the electrically conductive pad is released from a screen. A stylus body (1) has an electrically conductive core (4), and the electrically conductive core (4) has a hollow electrically conductive pad (7) at the tip. At an outside peripheral portion, the electrically conductive pad (7) engages with a pad holder (10) and a closing unit (11). The electrically conductive pad (7) accommodates a pressing body (12) in the inside. The pressing body (12) presses the inner surface of the electrically conductive pad (7) toward the outside by using a spring (13). Even if the electrically conductive pad (7) has a depression, the electrically conductive pad recovers the original shape immediately due to the pressing body (12).