Patent ID: 6287036
Filing Date: 2001-09-11
Classification: B43K

Abstract:
A knocking writing utensil for use with a writing medium, comprising:an external cylinder for receiving the writing medium, said medium being urged rearwardly;a rotational cam mechanism comprising a cam cylinder capable of rotating and moving rearwardly and forwardly inside the external cylinder and regulating rearward movement of the writing medium, a cam body for rotating the cam cylinder at a predetermined angle every time the cam cylinder is propelled forwardly so that the cam cylinder moves alternately to a forward position and a withdrawal position, and a cam bar capable of pushing the cam cylinder forwardly; anda knock body being connected with the cam bar so that a knock operation is feasible, said knock body undergoing a knock operation so that said cam cylinder rotates as well as moves rearwardly and forwardly in the axial direction to drive the writing medium,wherein a window, from which an interior of said external cylinder is visible, is provided at a portion of a circumferential surface of the external cylinder, andwherein a rotational drum, having indications on an outer circumferential surface thereof and rotating in an interlocking fashion with rotation of said cam cylinder, is located inside the external cylinder so that said indications are visible from said window.