Dose detection module for a medication delivery device

Abstract

The present disclosure relates to a dose detection system and method for a medication delivery device. The dose detection system may include a dosing component attached to an actuator and rotationally and axially moveable relative to a coupling component attached to a dose setting member. The dose detection system may further comprise a module including an electronic sensor operative to detect a relative rotation of the coupling component and the dosing component to detect a dose delivered by the medication delivery device.

1 - 21 . (canceled) 
     
     
         22 . A dose detection module removably attachable to a proximal portion of a medication delivery device for delivery of a medication, the medication delivery device including a device body, a dose setting member rotatable about an axis during dose setting, a dose setting skirt attached to said device body, and a pressable dose button, said dose setting skirt configured to rotate with said dose setting member relative to said device body during dose setting, the dose detection module comprising:
 a housing configured to receive the dose setting skirt and the pressable dose button of the medication delivery device, the housing including a first housing component configured to engage with the dose setting skirt and co-rotate about the axis with the dose setting skirt during dose setting, and a second housing component having a first operating mode during dose setting and a second operating mode during dose delivery, in the first operating mode the second housing component and the first housing component being rotationally fixed relative to one another, and in the second operating mode the second housing component is configured to axially translate along the axis relative to the first housing component; and   an electronics assembly including a rotation sensor and a sensed component disposed within the housing radially relative to one another, the rotation sensor operative to detect a relative rotation of the sensed component.   
     
     
         23 . The dose detection module of  claim 22 , wherein the first housing component comprising a plurality of surface features sized to engage the dose setting skirt. 
     
     
         24 . The dose detection module of  claim 23 , wherein the plurality of surface features comprises variably sized projections and grooves that are sized to engage corresponding surface features of the dose setting skirt. 
     
     
         25 . The dose detection module of  claim 22 , wherein the second housing component is rotationally fixed relative to the pressable dose button. 
     
     
         26 . The dose detection module of  claim 25 , wherein a friction pad is disposed between the second housing component and the pressable dose button. 
     
     
         27 . The dose detection module of  claim 22 , wherein the rotation sensor comprises one of a sliding contact, an optical sensor, an acoustic sensor, a magnetic sensor, or a mechanical switch. 
     
     
         28 . The dose detection module of  claim 27 , wherein the rotation sensor is associated with one of the first housing component and the second housing component, and the sensed component is associated with the other of the first housing component and the second housing component. 
     
     
         29 . The dose detection module of  claim 28 , wherein the rotation sensor is a sliding contact arm and the sensed component is a conductive segment. 
     
     
         30 . The dose detection module of  claim 22 , wherein, when the dose detection module is attached to the proximal portion of the medication delivery device, a bottom portion of the housing is engageable with the pressable dose button. 
     
     
         31 . The dose detection module of  claim 22 , wherein during drug delivery the second housing component is configured to rotate relative to the first housing component. 
     
     
         32 . The dose detection module of  claim 31 , wherein the rotation sensor is coupled to the second housing component and the sensed component is coupled to the first housing component. 
     
     
         33 . The dose detection module of  claim 22 , wherein the second housing component includes a first wall and a second wall disposed radially inward from the first wall. 
     
     
         34 . The dose detection module of  claim 33 , wherein the first housing component includes a wall member extending between the first wall and the second wall. 
     
     
         35 . The dose detection module of  claim 33 , wherein the first housing component includes a plurality of openings and slots. 
     
     
         36 . A medication delivery device comprising:
 a device body;   a dose setting member attached to said device body and rotatable about an axis of rotation relative to said device body;   an actuator attached to said device body, the actuator including a dose setting skirt and a pressable dose button, the dose setting skirt rotatable with said dose setting member relative to said device body during dose setting, said pressable dose button moving axially and non-rotatably relative to said device body during dose delivery;   a dose detection module removably attachable to a proximal portion of the device body, the dose detection module comprising a housing configured to receive the dose setting skirt and the pressable dose button of the medication delivery device, the housing including a first housing component configured to engage with the dose setting skirt and co-rotate about the axis with the dose setting skirt during dose setting, and a second housing component having a first operating mode during dose setting and a second operating mode during dose delivery, in the first operating mode the second housing component and the first housing component being rotationally fixed relative to one another, and in the second operating mode the second housing component is configured to axially translate along the axis relative to the first housing component, and an electronics assembly including a rotation sensor and a sensed component disposed within the housing radially relative to one another, the rotation sensor operative to detect a relative rotation of the sensed component.   
     
     
         37 . The medication delivery device of  claim 36  in which the second housing component includes an outer wall extending distally to radially overlap at least a portion of an exposed circumferential surface of said dose setting member. 
     
     
         38 . The medication delivery device of  claim 36  in which the second housing component includes an inner wall and an outer wall disposed in a radial arrangement and axially movable relative to the first housing component. 
     
     
         39 . The medication delivery device of  claim 36  further comprising a locking mechanism operative to rotationally lock the first housing component and the second housing component in the first operating mode. 
     
     
         40 . The medication delivery device of  claim 39  in which distal axial movement of the second housing component relative to said device body is operative to disengage the locking mechanism to allow rotation of the first housing component relative to the second housing component. 
     
     
         41 . The medication delivery device of  claim 36 , wherein said device body includes a reservoir holding a medication.