US 12,239,826 B2
Drug delivery assembly with moving sensor system
Lars Morten Bom, Hoersholm (DK); Brian Mouridsen, Fredensborg (DK); Jesper Hoeholt, Melby (DK); Bennie Peder Smiszek Pedersen, Haslev (DK); Laurits Hoejgaard Olesen, Koebenhavn K (DK); and Kim Ejholm Hansen, Alleroed (DK)
Assigned to Novo Nordisk A/S, Bagsvaerd (DK)
Appl. No. 17/292,952
Filed by Novo Nordisk A/S, Bagsvaerd (DK)
PCT Filed Dec. 3, 2019, PCT No. PCT/EP2019/083468
§ 371(c)(1), (2) Date May 11, 2021,
PCT Pub. No. WO2020/115031, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 18209976 (EP), filed on Dec. 4, 2018.
Prior Publication US 2022/0001110 A1, Jan. 6, 2022
Int. Cl. A61M 5/315 (2006.01)
CPC A61M 5/31551 (2013.01) [A61M 5/31585 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/50 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A drug delivery assembly, comprising:
a housing,
a drug reservoir or structure for receiving a drug reservoir,
drug expelling structure comprising:
a dose setting member allowing a user to set a dose amount of drug to be expelled from the drug reservoir,
a release member actuatable between a proximal position and a distal position, the proximal position allowing a dose amount to be set, the distal position allowing the drug expelling structure to expel a set dose,
a drive spring arranged to be strained during dose setting and released by the release member to thereby drive expelling of an amount of drug from the drug reservoir, and
an indicator adapted to rotate corresponding to a reference axis and relative to the housing during expelling of a dose amount of drug, the amount of rotation being indicative of the size of the expelled dose amount, the indicator being moved axially between a proximal position and a distal position when the release member is moved to its distal position,
an actuatable release assembly moveable between an initial proximal position, an intermediate position in which the release member is engaged in its proximal position, and an actuated distal position in which the release member has been moved to its distal position,
a sensor system comprising:
a sensor component adapted to measure a property of the indicator indicative of a rotational position and/or a rotational movement of the indicator, and
a processor configured to determine on the basis of measured values from the sensor component a rotational position and/or amount of rotational movement of the indicator,
wherein the sensor component is coupled to and moves axially with the release assembly, this allowing the sensor component to move axially together with the indicator as the indicator is moved axially between its proximal position and its distal position.