| 摘要 |
PROBLEM TO BE SOLVED: To start supplying a chemical liquid by a simple operation. SOLUTION: A chemical liquid supplying instrument 1 is provided with a cylindrical syringe, a gasket 3 sliding inside the syringe by liquid-tight, a plunger 4 being freely attachable/detachable as against the gasket 3, a coil spring 5 pressurizing the gasket 3 in a syringe tip direction and a restricting means 6 for holding the coil spring 5 in a compression state. The restricting means 6 is constituted of a first elastic body compressing members 7 and the second elastic body compressing member 8 which are mutually engaged and the coil spring 5 is kept in the compression state by the engagement of then. When a projection 44 of the plunger 4 which is removed from the gasket 3 is inserted to a groove so as to rotate the plunger 4, the first elastic body compressing member 7 is rotated as against the second one 8, their engagement state is released and restriction for holding the coil spring 5 in the compression state is released. |
