| 摘要 |
PURPOSE: To obtain a syringe which is easy to handle and is free from a failure in ordinary operation by including a packing provided with a screw structure which is molded of rubber or plastics and is screwed to the mechanism part of an injecting device. CONSTITUTION: This syringe is composed of an outside cylinder 1 molded of the transparent plastics and the packing 2 molded of the rubber having elasticity. A plastic member capable of maintaining hermeticity is also usable for this packing 2. The packing 2 is internally provided with a threaded part 4 which plays the role of connection to the mechanism part of the injector. The threaded part 4 is directly cut in the rubber and is formed as an internal screw thread structure. The threaded structure of the mechanism part and the threaded structure of the packing are coupled by screwing when the mechanism part of the injector is inserted into the outer cylinder of the syringe and the front end of the mechanism part arrives at the position of the packing. The structure of the connected part is simplified by the adoption of the threaded structure and the failproof coupling free from errors is assured different from a case where a handle on book is used. |
