公开(公告)号：US5613951A

公开(公告)日：1997-03-25

申请号：US335843

申请日：1995-01-09

申请人： Philippe Meyer ,  Ewald Pickhard

发明人： Philippe Meyer ,  Ewald Pickhard

IPC分类号： A61M5/31 ,  A61M5/50 ,  A61M5/00

CPC分类号： A61M5/5013 ,  A61M2005/3128 ,  A61M2005/5053

摘要： The invention is a single use injection device (1) having an injection cylinder (2) for receiving a liquid medium, an injection needle (6), and a piston (4) which can slide inside the injection cylinder (2) and which is movably linked to a piston rod (5) which extends in the opposite direction to the injection needle (6). An anti-reuse device (7) which is actuated by the medium moved by the piston (4) is arranged in an inlet area (37) of the injection cylinder (2) that faces the injection needle (6) and has a switching member (22) with a sealing section (48) having a larger cross-sectional surface than the cross-section of an opening (33) provided in a retaining member (21) and whose sealing section (48) is retained in a rest position with a circular ring-shaped retaining member (21) which is elastically deformable in the radial direction on the side of the retaining member (21) that faces the piston (4). In the locking position of the switching member (22), the sealing section (48) is located on the side of the retaining member (21) that faces the injection needle (6). A reception room for the switching member (22) or for its sealing section (48) is arranged between the retaining member (21) and the injection needle (6). The switching member (22) has a guiding element (23) adjacent to the sealing section (48) which is guided in a guiding path (49).

摘要翻译： PCT No.PCT / AT93 / 00085 Sec。 371日期1995年1月9日 102（e）日期1995年1月9日PCT提交1993年5月19日PCT公布。 第WO93 / 23099号公报 日期：1 9 9 9年11月25日本发明是具有用于接收液体介质的注射筒（2），注射针（6）和能够在注射缸内滑动的活塞（4）的单次使用注射装置（1） 并且其可移动地连接到沿着与注射针（6）相反的方向延伸的活塞杆（5）。 由所述活塞（4）移动的介质致动的防再利用装置（7）被配置在所述注射缸（2）的与所述注射针（6）相对的入口区域（37）中，并且具有切换构件 （22）具有密封部分（48），该密封部分具有比设置在保持部件（21）中的开口（33）的横截面更大的横截面，并且其密封部分（48）保持在休止位置， 圆形的环形保持构件（21），其在所述保持构件（21）的面向所述活塞（4）的侧面上沿径向可弹性变形。 在切换部件（22）的锁定位置，密封部（48）位于与注射针（6）相对的保持部件（21）侧。 在保持构件（21）和注射针（6）之间设置有用于切换构件（22）或其密封部（48）的接收室。 切换构件（22）具有与密封部分（48）相邻的引导元件（23），引导元件（23）在引导路径（49）中被引导。