| 摘要 |
Device for automatically injecting injection liquids In a device ( 1 ) for automatically injecting injection liquids, including an axially subdivided housing whose parts are connectable with each other, wherein an axially displaceable pressure pin ( 5 ) is guided in a first housing part ( 2 ), which pin is capable of being inserted against a force accumulator ( 6 ) and locked in the inserted position and extended upon relief of the force accumulator ( 6 ), wherein an injection needle ( 15 ) fixed in a needle guide ( 14 ) and an ampoule ( 13 ) are mounted in a second housing part ( 3 ) so as to be axially displaceable relative to each other, wherein the injection needle ( 15 ) on its side facing the ampoule ( 13 ) is designed as a perforation piece ( 32 ) for the ampoule ( 13 ), the ampoule ( 13 ) with its end facing the injection needle ( 15 ) is mounted to reach into a sleeve ( 16 ) fixed within the second housing part ( 3 ) and whose inner diameter substantially corresponds to the outer diameter of the ampoule ( 13 ). Radially inwardly protruding projections ( 17 ) are formed on the inner periphery of the sleeve ( 16 ), and the sleeve ( 16 ) comprises locking members cooperating with locking members ( 20 ) of the needle guide ( 14 ), whereby an axial displacement of the ampoule ( 13 ) in the direction to the needle guide ( 14 ) while overcoming the displacement resistance exerted by the projections ( 17 ) causes the release of the locking members ( 20 ) and the axial displaceability of the needle guide ( 14 ).
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