Dose detection module for a medication delivery device

A dose detection module removably attachable to a medication delivery device, the medication delivery device including a device body, a dose setting member, and an actuator, the dose setting member spiraling relative to the device body during dose delivery in relation to the amount of dose delivery, the dose setting member including an exposed circumferential surface for use in rotating the dose setting member relative to the device body, and the actuator spiraling with the dose setting member during dose setting and translating without rotation relative to the device body during dose delivery, said module comprising:

• a coupling component configured to be axially and rotationally fixed to the dose setting member;
• a dosing component having a first operating mode in which said dosing component is axially and rotationally fixed to said coupling component during a dose setting operation of the medication delivery device, and a second operating mode in which said dosing component is axially and rotationally fixed to the actuator and in which said coupling component is rotatable relative to said dosing component during a dose delivery operation of the medication delivery device;
• and
• an electronics assembly attached to said dosing component, said electronics assembly including a rotation sensor operative to detect rotation of said coupling component relative to said dosing component during dose delivery.

A method of operating a medication delivery device, the medication delivery device including a device body, a dose setting member, and an actuator, the dose setting member spiraling relative to the device body during dose delivery in relation to the amount of dose delivery, the dose setting member including an exposed circumferential surface for use in rotating the dose setting member relative to the device body, and the actuator spiraling with the dose setting member during dose setting and translating without rotation relative to the device body during dose delivery, said method comprising:

• attaching a module to the medication delivery device, the module comprising a coupling component, a dosing component, and an electronics assembly, the coupling component including a coupling surface configured to be attached to the exposed circumferential surface of the dose setting member and said attaching comprising attaching the coupling surface to the exposed circumferential surface to axially and rotationally fix the coupling component to the dose setting member;
• placing the module in a first operating mode with the dosing component axially and rotationally locked to the coupling component;
• rotating the dosing component relative to the device body to thereby rotate the dose setting member to set a dose for delivery, the dosing component and the coupling component rotating and translating together during dose setting;
• axially displacing the dosing component, a first distance in the distal direction toward the coupling component to place the module in a second operating mode with the coupling component rotationally unlocked from the dosing component and with the dosing component axially and rotationally locked with the actuator;
• axially displacing the dosing component, a further distance in the distal direction to deliver the dose, the dose setting member and the coupling component rotating relative to the dosing component and the actuator during dose delivery;
• and
• determining the dose delivery based on the rotation of the coupling component relative to the dosing component during dose delivery.

A dose detection module removably attachable to a medication delivery device, the medication delivery device including a device body, a dose setting member, and an actuator, the dose setting member spiraling relative to the device body during dose delivery in relation to the amount of dose delivery, the dose setting member including an exposed circumferential surface for use in rotating the dose setting member relative to the device body, and the actuator spiraling with the dose setting member during dose setting and translating without rotation relative to the device body during dose delivery, said module comprising:

• a housing including a circumferential wall, a proximal end wall, and a distal base wall to abut with said device actuator, said proximal end wall comprising a light pipe having a disc shape configured to receive light axially and provide light radially in 360 degrees;
• the housing having a first operating mode in which said housing is axially and rotationally fixed relative to the dose setting member during a dose setting operation of the medication delivery device, and a second operating mode in which said housing is axially and rotationally fixed relative to the dose setting component during a dose delivery operation of the medication delivery device;
• and
• an electronics assembly attached within said housing, said electronics assembly including a rotation sensor arrangement operative to detect relevant rotation between said housing and the dose setting member during the dose delivery operation, and an indicator light disposed distal to the light pipe, said indicator light operable to emit light axially toward the light pipe.