Medicament delivery device
AssigneeSHL Group AB
InventorGunnar Elmén
Life of this patent
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Abstract
The invention relates to a medicament delivery device comprising a locking mechanism (5) for locking a plunger rod (4). The locking mechanism (5) comprises a locking wheel (6) and locking means (7), said locking means (7) being moveable between an active position where the locking means (7) prevent the locking wheel (6) from rotation and an inactive position where the locking means (7) allow the locking wheel (6) to rotate, wherein said plunger rod (4) extends through an opening in the locking wheel (6); and a resilient member (8) arranged at the moveable locking means (7) and being arranged to act on the moveable locking means (7) to displace said movable looking means (7) towards the inactive position where the locking means (7) allow the locking wheel (6) to rotate.
Claims14
A medicament delivery device, comprising:
- a container housing arranged to receive and hold a medicament container having a plunger;
- and
- a rear housing releasably connected to the container housing and comprising:
- a plunger rod arranged to act on the plunger when the medicament container is received in the container housing;
- a drive mechanism arranged to drive the plunger rod;
- and
- a locking mechanism for locking the plunger rod, comprising:
- a locking wheel;
- a locking device movable between an active position, in which the locking device prevents rotation of the locking wheel, and an inactive position, in which the locking device allows rotation of the locking wheel, wherein the plunger rod extends through an opening in the locking wheel, and the plunger rod and the opening in the locking wheel are arranged to mate with each other such that axial movement of the plunger rod relative to the locking wheel is allowed while rotation of the plunger rod relative to the locking wheel is prevented;
- and
- a resilient member arranged at the movable locking device and to act on the movable locking device to displace the movable locking device toward the inactive position;
- wherein the locking device comprises at least one flexible arm having a cogged segment which in the active position engages with a cogged surface of the locking wheel.
A medicament delivery device, comprising:
- a container housing arranged to receive and hold a medicament container having a plunger;
- and
- a rear housing releasably connected to the container housing and comprising:
- a plunger rod arranged to act on the plunger when the medicament container is received in the container housing;
- a drive mechanism arranged to drive the plunger rod;
- and
- a locking mechanism for locking the plunger rod, comprising:
- a locking wheel;
- a locking device movable between an active position, in which the locking device prevents rotation of the locking wheel, and an inactive position, in which the locking device allows rotation of the locking wheel, wherein the plunger rod extends through an opening in the locking wheel, and the plunger rod and the opening in the locking wheel are arranged to mate with each other such that axial movement of the plunger rod relative to the locking wheel is allowed while rotation of the plunger rod relative to the locking wheel is prevented;
- and
- a resilient member arranged at the movable locking device and to act on the movable locking device to displace the movable locking device toward the inactive position, wherein the resilient member comprises a wire spring.
A medicament delivery device, comprising:
- a container housing arranged to receive and hold a medicament container having a plunger;
- and
- a rear housing releasably connected to the container housing and comprising:
- a plunger rod arranged to act on the plunger when the medicament container is received in the container housing;
- a drive mechanism arranged to drive the plunger rod;
- and
- a locking mechanism for locking the plunger rod, comprising:
- a locking wheel;
- a locking device movable between an active position, in which the locking device prevents rotation of the locking wheel, and an inactive position, in which the locking device allows rotation of the locking wheel, wherein the plunger rod extends through an opening in the locking wheel, and the plunger rod and the opening in the locking wheel are arranged to mate with each other such that axial movement of the plunger rod relative to the locking wheel is allowed while rotation of the plunger rod relative to the locking wheel is prevented;
- and
- a resilient member arranged at the movable locking device and to act on the movable locking device to displace the movable locking device toward the inactive position, wherein the resilient member comprises a sheet metal spring.
Dependencies are inferred from the claim text.