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;
- 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,
- 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 a distal end surface of the activation member moving axially from a first position to a second position relative to an inner surface of the injection device such that the distal end surface of the activation member strikes the inner surface of the injection device.
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;
- 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,
- 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 a distal end surface of the activation member moving axially from a first position to a second position relative to an inner surface of the injection device such that the distal end surface of the activation member strikes the inner surface of the injection device.
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;
- 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,
- 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,
- wherein the audible or tactile signal results from the activation member moving from a first position to a second position such that the activation member strikes an inner surface of the injection device, and
- wherein the axial displacement of the button causes the proximal end of the plunger rod to hit the stopper resulting in an audible or tactile indication that the injection has started.
Dependencies are inferred from the claim text.