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    • 34. 发明授权
    • Syringe
    • 注射器
    • US5688252A
    • 1997-11-18
    • US535915
    • 1995-09-28
    • Terumi MatsudaNobuo Tanaka
    • Terumi MatsudaNobuo Tanaka
    • A61M5/28A61M5/315A61M5/00
    • A61M5/2448A61M5/284A61M5/31511A61M2005/287A61M5/31515
    • A syringe has a tubular body provided at its front end portion with a portion for mounting an injection needle thereon and opens at its rear end portion so as to have a rear end opening. A gasket for sealing the rear end opening of the tubular body is slidably inserted into the tubular body. A plunger rod is detachably coupled with a rear end portion of the gasket through the rear end opening of the tubular body. A male screw is formed at a front end portion of the plunger rod and is circumferentially alternately divided into at least one male screw portion and at least one first recess portion. A female screw is formed on a rear end face of the gasket and is circumferentially alternately divided into at least one female screw portion and at least one second recess portion. A state where the male screw portion and the first recess portion of the male screw are, respectively, fitted into the second recess portion and the female screw portion of the female screw, the male screw is rotated relative to the female screw so as to be brought into engagement with the female screw such that the plunger rod is coupled with the gasket.
    • 注射器具有在其前端部设置有用于在其上安装注射针的部分的管状体,并在其后端部开口以具有后端开口。 用于密封管状体的后端开口的垫圈可滑动地插入到管状体中。 柱塞杆通过管状体的后端开口与衬垫的后端部分可拆卸地联接。 外螺纹形成在柱塞杆的前端部,并且周向交替地分成至少一个阳螺纹部和至少一个第一凹部。 内螺纹形成在垫圈的后端面上,并且周向地交替地分成至少一个内螺纹部分和至少一个第二凹部。 外螺纹部和外螺纹的第一凹部分别嵌入第二凹部和内螺纹的内螺纹部的状态,外螺纹相对于内螺纹旋转, 与内螺纹接合,使得柱塞杆与垫圈联接。