| 摘要 |
PROBLEM TO BE SOLVED: To easily notice a projecting state of a writing tip by providing a ball of a clip immersed into a window portion only at a state position where the tip is projected from a tip port of a barrel by rotation of an actuator with respect to the barrel. SOLUTION: When an actuator 34 is rotated in one direction to a barrel 30, sliding protruding portions 26 of sliding blocks 21a, 21b are slid along a spiral groove 40 upon rotation the actuator 34. Thus, either one block 21a is advanced, while the other 21b is retracted so that a writing tip 11 of a writing unit 1a of an advancing side can be projected from a tip port of the barrel 30. In the state that one ballpoint pen writing unit 1a is projected, a ball 39 of a clip 38 is immersed in a window 33a on a periphery of the barrel 30 to the state that the clip 38 is not hooked on a breast pocket. Accordingly, there is no fear of contaminating clothing. |
