| 摘要 |
In the safety cutter knife provided, a blade slide (3) holding a blade (4) is rotated in the direction nearly perpendicular to the longitudinal center line (O) of the housing (1) of the cutter knife by virtue of a reaction force from a work material (W) when the cutting edge (4a) of the blade (4) extended from the housing (1) is pressed into the work material (W) while the blade slide (3) and the actuator slide (2) are located at the extended position. With this rotation of the blade slide (3), the engagement between the blade slide (3) and the actuator slide (2) is released, such that the blade slide (3) with the blade (4) can return automatically from the extended position to the retracted position by virtue of the energizing force of a spring (5) when the blade (4) is released from the work material (W). |
