| 摘要 |
<p>The surface (21) of the plunger and the inner wall (15) of the implant housing are equipped with interacting members (22,12) which allow the plunger to be pushed inwards into the implant housing while preventing the removal of the plunger from the implant housing. The cannula is made of plastic. The surface of the plunger is equipped with a member (22) which allows the displacement of the plunger inwards into the implant housing and that the rim or edge (12) of the implant housing distal to the cannula is shaped so that the inner cross-sectional area of the implant housing is reduced at point (16). The edge acts as a stop for the element on the surface of the plunger when the plunger is displaced outwards.</p> |
