| 摘要 |
PROBLEM TO BE SOLVED: To provide a chemical injection device by which chemical can be filled into an injection device main body directly from a chemical bottle, and the residual amount of the chemical can be correctly grasped. SOLUTION: This chemical injection device comprises a barrel 1, a gasket 2, a connecting member 3, a plunger 4, coil spring 5. In the barrel 1, a base edge is opened and a port part 11 is provided on its tip. Also, the gasket 2 is liquid-tightly and freely slidably inserted into a lumen of the barrel 1. The connecting member is a cylindrical member having a tip and base edge, the gasket 2 is connected to its tip 31 so as to be freely released, and the plunger 4 is attachably/detachably engaged to its base edge 32. The coil springs 5 are compressed to be housed between the gasket 2 and the connecting member 3, and when the gasket 2 is released from the connecting member 3, the gasket moves forward by repulsive force of the coil springs 5 to discharge the chemical. |
