Medicament delivery device
AssigneeShl Medical AG
InventorsSebastian Karlsson, Gunnar Elmén
Life of this patent
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Abstract
An injection device with a feedback mechanism includes a housing for a medicament container having a stopper, a plunger rod for acting on the stopper, a button interactively connected to the plunger rod, an activation member having a flexible locking device releasably connected to the plunger rod, a drive force device, a locking member slidable between positions in which the locking member either completely or partially surrounds the flexible locking device, and a guide rod. Audible and tactile information that an injection has started is provided by the plunger rod's hitting the stopper.
Claims20
A feedback mechanism for an injection device, the feedback mechanism comprises:
- an activation member having a distal end surface;
- a plunger rod operatively connected to the activation member, where the plunger rod has a proximal end and is configured to move proximally relative to the activation member;
- a button operatively associated with the activation member and having an inner surface;
- and
- wherein axial displacement of the button causes activation of the feedback mechanism such that an audible or tactile signal is generated when the injection device has completed an injection, and
- wherein the audible or tactile signal results from the activation member moving from a first position to a second position such that the distal end surface strikes the inner surface of the button.
An assembly for an injection device comprising:
- a housing having a distal housing part and a proximal housing part, where the proximal housing part holds a medicament container having a stopper;
- and
- a feedback mechanism comprising:
- an activation member having a distal end surface;
- a plunger rod operatively connected to the activation member, where the plunger rod has a proximal end and is configured to move proximally relative to the activation member;
- and
- a button operatively associated with the activation member and having an inner surface,
- wherein axial displacement of the button causes activation of the feedback mechanism such that an audible or tactile signal is generated when an injection is completed, and
- wherein the audible or tactile signal is caused when the activation member moves from a first position to a second position such that the distal end surface strikes the inner surface of the button.
A feedback mechanism for an injection device having, the feedback mechanism comprises:
- an activation member having a distal end surface;
- a plunger rod operatively connected to the activation member, where the plunger rod has a proximal end and is configured to move proximally relative to the activation member when the injection device is activated;
- a button operatively associated with the activation member and having an inner surface;
- and
- wherein axial displacement of the button causes activation of the feedback mechanism such that a second audible or tactile signal is generated when an injection is completed,
- wherein a first audible or tactile signal is generated when the injection has started and is caused when the proximal end of the plunger rod strikes a stopper slidably positioned within a medicament container positioned within the injection device, and
- wherein the second audible or tactile signal is generated when the injection is completed and is caused by the activation member moving from a first position to a second position such that the distal end surface hits the inner surface of the button.
Dependencies are inferred from the claim text.