Patent ID: 11931556
Assignee: NOVO NORDISK A/S
Field: Medical technology (Instruments)
Classification: CPC A  G  H | IPC A  G  H

Claim 0:
1. A drug injection device comprising:
a first element and a second element configured to undergo relative movement in respect of each other, said movement corresponding to an action performed on or by the drug injection device and representing an amount of drug delivered or to be delivered from the drug injection device,
wherein the first element comprises a plurality of protrusions serially disposed along a trajectory of said relative movement, the protrusions protruding in a protruding direction,
wherein the second element comprises a second element base, and at least one deflectable transducer configured for sequentially cooperating with the plurality of protrusions of the first element to generate an activation signal as the at least one deflectable transducer is deflected in the protruding direction when travelling past each protrusion, wherein the at least one deflectable transducer defines a base portion attached to the second element base, the base portion being non-movably arranged in the protruding direction relative to the second element base, and further defines a deflectable portion having a tip end, wherein the deflectable portion deflects relative to the base portion in the protruding direction upon cooperation with protrusions of the first element, and
a processor electrically connected with the at least one deflectable transducer to register generated activation signals, and configured to determine, from registered activation signals, an amount of drug delivered or to be delivered from the drug injection device,, wherein the at least one of the deflectable transducer comprises:
a carrier foil that extends from the base portion to the tip end of the deflectable portion, and
a sensor element comprising a strain sensitive material disposed on the carrier foil and extending from the base portion towards the tip end of the deflectable portion, and, wherein the carrier foil, between the base portion and tip end of the deflectable portion, comprises a non-supported portion having said strain sensitive material disposed at least partly along the non-supported portion.