Injection device comprising a cover cap and a system for preventing the cover cap from being remounted
An injection device for distributing a liquid product, in particular a medicament, includes: a) a housing with a longitudinal axis (L) and a product container, in particular a syringe, provided in the housing, the product container including a displaceable plunger, where the plunger can be displaced along the longitudinal axis (L) in a distal direction using a propulsion member to distribute the product contained in the product container; b) a cover cap which is mounted on the distal end of the housing and which can be removed from the housing; and c) a mechanism which prevents the cover cap from being remounted on the distal end of the housing.
1. An injection device for discharging a fluid product, comprising:
a) a housing with a longitudinal axis (L) and a product container arranged in the housing, the product container comprising a plunger, which can be displaced along the longitudinal axis (L) in a distal direction by means of a driving element for discharging the fluid product contained in the product container;
b) a sleeve-shaped release element that extends in a starting position past a distal end of the housing and can be moved relative to the housing in a proximal direction from the starting position into a release position for discharging the fluid product when a cover cap is removed from the housing, and is blocked against movement into the release position when the cover cap is arranged on the housing; and
c) a mechanism that blocks the cover cap from being remounted on the distal end of the housing after the cover cap has been removed,
wherein the mechanism comprises an axial stop and an axial mating stop,
wherein the axial stop is formed by a rotating sleeve supported on the housing such that the rotating sleeve can rotate about the longitudinal axis (L) of the injection device and the axial mating stop is formed by the cover cap,
wherein the cover cap or a part of the cover cap slides on the rotating sleeve during removal of the cover cap and rotates the rotating sleeve about the longitudinal axis (L), whereby the axial stop is rotated about the longitudinal axis (L) into a locking position, and
wherein, in the locking position, the axial stop blocks the cover cap from being remounted on the distal end of the housing, in that the axial stop and axial mating stop contact each other upon an attempt to remount the cover cap on the distal end of the housing.
2. The injection device according to claim 1 , wherein the product container comprises an injection needle non-detachably connected thereto, wherein the injection needle is surrounded by a needle protective cap that is detachably mounted on the product container.
3. The injection device according to claim 2 , wherein the cover cap is connected to the needle protective cap such that removing the cover cap removes the needle protective cap from the product container.
4. The injection device according to claim 1 , wherein the axial stop is resiliently-mounted, and when the cover cap is removed, the axial stop springs from a deflected position into the locking position.
5. The injection device according to claim 4 , wherein the axial stop springs from the deflected position into the locking position by moving radially towards the longitudinal axis (L), or in a circumferential direction about the longitudinal axis (L), into the locking position.
6. The injection device according to claim 1 , wherein the axial mating stop is resiliently-mounted, and when the cover cap is removed, the axial mating stop springs from a deflected position into the locking position.
7. The injection device according to claim 6 , wherein the axial mating stop springs from the deflected position into the locking position by moving radially towards the longitudinal axis (L), or in a circumferential direction about the longitudinal axis (L), into the locking position.
8. The injection device according to claim 7 , wherein the housing comprises an actuation surface that deflects the axial mating stop during the removal of the cover cap from the housing from a starting position into the deflected position.
9. The injection device according to claim 8 , wherein the housing comprises, on an outer periphery, a recess in which an extension that forms the axial mating stop engages in the starting position, wherein a distal end of the recess forms the actuation surface.
10. The injection device according to claim 9 , wherein the cover cap comprises a cover cap base body and an outer sleeve that is connected to the cover cap base body in a rotationally locked and axially fixed manner and forms the axial mating stop.
11. The injection device according to claim 10 , wherein the axial mating stop is arranged proximal to the axial stop when the cover cap is arranged on the housing, and can be moved distally along the longitudinal axis (L) to the axial stop by removing the cover cap.
12. The injection device according to claim 1 , wherein the release element comprises a resiliently-mounted locking means, wherein the locking means can be deflected by the cover cap into a locking position in which the locking means is opposite a stop formed by the injection device, wherein, in a release position that the locking means assumes, the locking means can be moved past the stop formed by the injection device when the cover cap is removed.