Mitsubishi Pencil Company, Limited

Tomoyuki Akagi

Kazuhiko Furukawa

Takeo Fukumoto

Yusuke Kobayashi

Tooru Nakajima

A ballpoint pen is provided in which the width of the drawing line can be changed, wherein responsiveness can be improved when distinguishing between drawing thin lines and thick lines. A ballpoint penprovided at the pen tip side with a first writing part having a writing ball, wherein the ballpoint penis characterized by being provided with a writing part at the pen tip side with which it is possible to write a thicker line than the line written with the first writing part, only the first writing part being used when the writing weight is 1 g and the writing angle is 90&#xb0;, and the second writing part being used when the writing weight is 200 g, and the writing angle is 40-90&#xb0;.

Growing community of inventors

Yokohama, Japan

Tomoyuki Akagi