Therapy devices, methods, and systems including a piston-style detector

A method for detecting capping of a medication delivery pen, the method comprising:

• receiving a medication delivery pen by a pen cap, wherein the pen cap includes:
• a detector mechanism including:
• an inner shell, including:
• a first open end configured to receive a medication delivery pen,
• a second end, and
• a sidewall defined by an outer surface and an opposing inner surface, the sidewall extending between the first open end and the second end, the sidewall at least partially defining a pen-receiving cavity, and
• a passageway that extends through the inner shell;
• at least one switch;
• and
• a translatable shaft at least partially disposed in the passageway and including a body that extends at least from a pen-interfacing portion in the pen-receiving cavity to a switch-interfacing portion thereof, wherein the translatable shaft is oriented to travel from a first location to at least a second location during capping of a medical delivery pen into the inner shell to toggle the at least one switch;
• and
• communicating a motion of the medication delivery pen to the translatable shaft during the capping so that the switch-interfacing portion is configured to cause the toggling of the at least one switch when the switch-interfacing portion interfaces with the at least one switch,
• wherein the translatable shaft is offset from and travels in a direction parallel to a central axis of the inner shell.

A system comprising:

• a pen cap for a medication delivery pen, wherein the pen cap includes:
• a detector mechanism including:
• an inner shell, including:
• a first open end configured to receive a medication delivery pen,
• a second end, and
• a sidewall defined by an outer surface and an opposing inner surface, the sidewall extending between the first open end and the second end, the sidewall at least partially defining a pen-receiving cavity, and
• a passageway that extends through the inner shell;
• at least one switch;
• and
• a translatable shaft at least partially disposed in the passageway and including a body that extends at least from a pen-interfacing portion in the pen-receiving cavity to a switch-interfacing portion thereof, wherein the translatable shaft is oriented to travel from a first location to at least a second location during capping of a medical delivery pen into the inner shell to toggle the at least one switch;
• an analyte sensor system in communication with the pen cap, wherein the analyte sensor includes:
• a blood glucose meter, a flash glucose monitor, or a continuous glucose monitor,
• wherein the translatable shaft is offset from and travels in a direction parallel to a central axis of the inner shell.