DEVICE FOR THE DOSED ADMINISTRATION OF A FLUID PRODUCT, ADAPTED FOR THE REPLACEMENT OF A CONTAINER

摘要

A device for administering a fluid product, the device including a first housing part provided with a receiver for the product, a second housing part detachably connectable to the first housing part, a piston rod held such that it can be displaced for the exertion of an emptying movement, an actuatable or releasable drive element for the piston rod, a coupling element including a coupling input element that couples the drive element to the piston rod in a coupling engagement, transmits a driving force of the drive element to the piston rod, and triggers the emptying movement, and a decoupling element displaceably connected to the second housing part and coupled to the first housing part such that it is displaced, by a movement of the housing parts in relation to each other when the housing parts are separated into a decoupling position wherein the piston rod is decoupled from the coupling input element.

主权项

1. An injection apparatus comprising:
a) a first casing part detachably coupled to a second casing part, wherein the first casing part accommodates a container filled with a fluid product and the second casing part comprises a dosing and drive means, the dosing and drive means comprising a drive member; b) a needle holder coupled to a distal end of the first casing part; c) a piston accommodated in the container and adapted to be moved in an advancing direction, wherein advancement of the piston in the advancing direction displaces and delivers the fluid product through a needle; d) a piston rod with an outer thread and moveable in a delivery movement in the advancing direction, wherein the drive member is for advancing the piston rod; e) a coupler which couples the drive member to the piston rod in a coupler engagement; f) a drive spring which supplies a drive force to the drive member; and g) a needle protection structure accommodated by at least one of the first or second casing parts such that it can slide counter to the advancing direction against a force of a restoring spring.