| 摘要 |
PROBLEM TO BE SOLVED: To make mode switching quick and easy by providing a switch member on an engage member so as to slide it, moving the switch member toward the direction of inner cylinder axis and a vertical direction and stopping the movement at a prescribed position. SOLUTION: Usually, an engage member 5 is pushed up and positioned above the inside of an outer cylinder 2 by the restoring force of a spring 6 mounted between a placing part 14 inside the outer cylinder 2 and a spring mounting part 22 of the engage member 5, and a half screw 21 of the engage member 5 is engaged with a screw 18 of an inner cylinder rod 4. When a switch member 7 is pushed down, the engage member 5 is moved down as well, the half screw 21 and the screw 18 are disengaged, and the inner cylinder rod 4 is separated from the engage member 5. Thus, the inner cylinder rod 4 can be freely moved in axial direction, and the suction of liquid and the removal of air bubbles for a syringe can be performed. Besides, a guide 26 is set along a guide line 30 and the switch member 7 is moved on a cover member 8 so that the engage member 5 can be held at the prescribed position. Thus, even when force is released, the engage member 5 is prevented by the restoring force of the spring 6 from returning to the original position. |
