Patent ID: 9545482
Date: 2017-01-17
CPC Classifications: A61M,G01D,G16H,G16Z

Claim:
1. A drug information detection device configured to detect an injected dose of an injection pen containing drug, an adjusting knob being arranged at one end of the injection pen for determining the injected dose, the drug information detection device comprising: a housing; a control assembly; a rotary encoder configured to convert rotational information of the adjusting knob into drug injected dose information, the rotary encoder comprising: the encoder body and the control assembly are fixed in the housing, the button is rotatably connected to the first end of the housing, a retaining ring is arranged at the first end of the housing, a first end of the button passes through the retaining ring, and a limit ring is arranged at an outer edge of a second end of the button for engaging with the retaining ring.