| 摘要 |
Upon depressing a knock rod in a state of writing of Fig. 8A , a cam protuberance 3b of a rotor turns rightward to assume a position shown in Fig. 8B . Upon removing a finger, the cam protuberance 3b turns sliding on a tilted surface, arrives at a position shown in Fig. 8C through a first vertical motion (distance d) and, further, arrives at a position shown in Fig. 8D through a second vertical motion (distance e). Here, a tilted surface of cam protuberance 3b comes in collision with a tilted surface of an inner cylinder cam 2b twice, and shocks are transmitted to a refill 7. By forming a step between the front half and the rear half of the tilted surface of the inner cylinder cam 2b, however, a distance of vertical motion of the cam protuberance 3b each time is shortened to decrease the shock of collision imparted to the refill each time. |
