| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary delivery type compound writing utensil, in the barrel tube of which a plurality of writing bodies are retractably and extendably arranged and the tip part of the barrel tube of which is made slender as much as possible so as to make the tip of a writing utensil conspicuous in order to realize an easy writing. SOLUTION: In the rotary delivery type compound writing utensil, in the barrel tube consisting of a front barrel and a rear barrel relatively rotatable to each other of which a plurality of the writing bodies are retractably and extendably arranged, the retraction and the extension of the writing bodies are adjusted by a cam, by which the relative rotation between the front barrel and the rear barrel is operated for the retraction and the extension of the writing bodies under the condition that the tapered surface of the cam under its developed fashion is made to be a curve having an intake. |
