Mechanical pencil

摘要

A mechanical pencil having a rotational drive mechanism which gradually rotates a writing lead on application of writing pressure and allowing rotational operation of the writing lead to be known reliably. First and second cam faces 6a and 6b are respectively formed at one end face and the other end face of a rotor 6 in an axial direction, and first and second fixed cam faces 13a and 14a arranged on the body cylinder side so as to respectively face the first and the second cam faces are provided to form the rotational drive mechanism for the writing lead. A plurality of grooves 8a in the axial direction are formed at a slider 8 of a pipe end 7 which projects forwardly from a body cylinder 1. Therefore, the user can see the grooves 8a (provided for the slider 8) rotated by rotation of the rotor 6.

主权项

1. A mechanical pencil arranged to grasp and release a writing lead by reciprocation of a chuck provided in a body cylinder so as to inch said writing lead forward, having a rotational drive mechanism for rotationally driving a rotor in one direction in conjunction with retreat operation of the writing lead into the body cylinder by the writing pressure applied to said writing lead and forward movement of the writing lead from the body cylinder by releasing the writing pressure, and arranged to transmit rotational motion of said rotor to said writing lead,
wherein a component arranged to extend from said body cylinder forwardly or rearwardly of said body cylinder is arranged to be rotationally driven in conjunction with the rotational motion of said rotor, and said component is provided with a display means for displaying a rotation state of said component.