Patent ID: 9597920
Date: 2017-03-21
CPC Classifications: A45D,B29C,B29L,B43K,B43L

Claim:
1. A writing instrument or an applicator, configured as a mechanical pencil including a rotational drive mechanism for rotationally driving a rotatable cam based on writing pressure that a writing lead receives and configured to transmit rotational motion of the rotatable cam to the writing lead, wherein the rotational drive mechanism includes a holder member configured to rotatably and axially movably support the rotatable cam and a sliding member that is fitted in the holder member and configured to axially push the rotatable cam forward, the rotational drive mechanism is also configured to rotate the rotatable cam by axially moving the rotatable cam based on writing pressure that the writing lead receives, on the holder member, a columnar piece that functions as an axially long guide protrusion is formed and on the sliding member, a guide portion that functions as a guide recess corresponding to the columnar piece is formed, so as to fit the sliding member slidably in the columnar piece, and a cushion spring configured to produce a bias force to axially push the rotatable cam forward is arranged making contact with the sliding member.