| 主权项 |
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:
an encoder body;a rotary block rotatably connected to the encoder body, wherein
the encoder body and the control assembly are electrically connected to each other,the housing covers the encoder body and the control assembly, a button is arranged at a first end of the housing,the rotary block is fixed to the button and whereinthe 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, anda limit ring is arranged at an outer edge of a second end of the button for engaging with the retaining ring. |
