| 摘要 |
PROBLEM TO BE SOLVED: To provide a lock system for a writing tool which is simply configured and enables a pen core to be protruded and retracted more simply by push-push operation.SOLUTION: In lock means 70, on the inside surface of a clip member 20, there are formed cam passages having different depths and shapes on the left and right and a heart-shaped cam receiving part 73. On an ink holder 30, a fitting groove is made in a circumferential direction, and a hollow, cylindrical operation body 74 having a locking protrusion 75 protruded is rotatably fitted into the fitting groove for assembling. In a pen housing, there is formed a guide passage for guiding the movement of the ink holder 30 and the operation body 74 along the cam passages by the operation of a knob 32. On the pen housing, a shaft hole 16 is made, and a hinge shaft 21 bent-formed integrally with the clip member 20 is provided while being fitted into the shaft hole 16 so as to allow movement to the left and right with the hinge shaft 21 as a center. A coil spring 78 is provided outside the hinge shaft 21 between the clip member 20 and the pen housing.SELECTED DRAWING: Figure 7 |
