| 摘要 |
PROBLEM TO BE SOLVED: To easily separate a plunger from a syringe and to rationally abandon the syringe by bonding a gasket through the male screw of the plunger and the female screw of a gasket and forming one projection on the top end face of the plunger in contact with the inner bottom face of the gasket at least. SOLUTION: The male screw is formed at the top end part of a plunger 1 and this is screwed with the female screw formed on the inside face of a gasket 10 so that the syringe and the plunger 1 can be easily separated. Besides, concerning the plunger 1, a projection 2 is formed on a top end face 3 in contact with the inner bottom face of the gasket 10. This projection 2 is formed while being inclined so that a top end 4 can be made oblique upward the right side in the case of syringer for turning the plunger 1 to right at the time of bonding the plunger 1 with the gasket 10. Thus, when turning and fastening the plunger 1 to right, the top end 4 of the projection 2 is engaged into the inner bottom face of the gasket 10, and the plunger 1 is surely fixed with the gasket 10. |
