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    • 8. 发明授权
    • Automatic pen-type injector
    • 自动笔式注射器
    • US07563252B2
    • 2009-07-21
    • US10563318
    • 2004-07-05
    • Jeremy MarshallSteven Mark Guy Rolfe
    • Jeremy MarshallSteven Mark Guy Rolfe
    • A61M5/00
    • A61M5/2033A61M5/326A61M2005/206
    • A syringe (1) is moved bodily forward by a plunger (7) (after release of a spring 8) by acting through an O-ring pressing onto an enlarged head (16) of a syringe container (3), in order to expose the needle (5) of the syringe before the plunger acts on a plug (4) within the syringe to cause the liquid to be ejected through the needle. There is, therefore, a two-step movement of the plunger, firstly together with the syringe through the medium of the O-ring, and secondly within the syringe container to force the plug forward, when a ledge (12) on the syringe container (3) is arrested by a stop (14), whereupon the frictional force between the plunger and the O-ring is relieved so that the plunger slides forward through the O-ring.
    • 注射器(1)由柱塞(7)(通过弹簧8释放)后通过O形环作用而朝向注射器容器(3)的扩大的头部(16)上进行身体向前移动,以便露出 柱塞之前的注射器针(5)作用在注射器内的塞子(4)上,以使液体通过针头喷射。 因此,存在柱塞的两步运动,首先与注射器一起通过O形环的介质,其次在注射器容器内以迫使塞子向前,当注射器容器上的凸缘(12) (3)被止动件(14)阻止,因此柱塞和O型圈之间的摩擦力被释放,使得柱塞向前滑过O型圈。