| 摘要 |
<p>A mechanical pencil in which a lead can be rotated by operation of a touch button (40). A holder (37) is disposed in a barrel (1). A rotative pipe (18) having a writing mechanism assembly incorporated therein is attached rotatably to the holder. Around the periphery of the holder, a slide member is disposed movably back and forth, and the slide member is moved by the touch button (40) disposed on the barrel. The holder houses a sleeve (54) which is moved forward by the slide member and rotates in a circumferential direction. On each of a front end face of the sleeve and a rear end face of the rotative pipe, rotation-transmitting cam faces (32, 57) are disposed. By the movement of the sleeve (54), cam faces are engaged with each other to rotate the rotative pipe, whereby the lead is rotated.</p> |
