| 摘要 |
PURPOSE: To move a writing-part greatly with less depress of push-part by placing cam surfaces of a cam crossly and abutting a pressing cam part of the push-part on both surfaces of the cam to push to the cross point. CONSTITUTION: When the push-part 7 is depressed, the part 7 drives the cam 6 sliding on the both cam surface 2a and 3a simultaneously from the contact point P to the direction of the arrow mark 1. The cam surface 2a formed on the inner cylinder 2 fixed in the body 1 and the cam surface 3a of the sliding cam 3 are slanting to the opposite direction each other and crossed at the contacted point P. As the cam surface 2a is fixed and projection 3b on the cam 3 is in the long groove 2c on the inner cylinder 2, the cam 6 pushes up the cam part 3 to the direction 1a of the top opening of the cylinder. The slanted angles of the cam surface 2a and 3a are recommended at about 45 deg. for smooth operation and for realizing the moving pass L of the cam part 3 moving together with the writing part 5 double to the moving pass of the cam 6. |
