Electronically assisted drug delivery device

摘要

The present invention relates to electronically assisted drug delivery devices (100). The drug delivery device may include a Gray code type detector for sensing dosage data, wherein the detector comprises a code track consisting of a sequence of alternating markings and a plurality of detectors that are mutually spaced in a direction extending along the code track. The drug delivery device may also include a dosage selector (260) which is moved in a proximal direction upon dose setting and in a distal direction upon dose injection, where the dosage selector is latched in the end of dose position by a latching element, the latching element actuating an end of dose switch for signalling the end of dose state. The drug delivery device may also incorporate power-management arrangements which effectively minimizes power consumption for the incorporated electronic circuitry.

主权项

1. A drug delivery device for setting and injecting set doses of a drug from a drug-filled reservoir comprising a Gray code type detector for detecting relative movement between a first element and a second element during dose setting and/or during injection, said Gray code type detector comprising:
a plurality of alternating first and second areas disposed on said first element, wherein said first and second areas are configured to first and second states, respectively, and wherein each of said first areas comprise width X1 and each of said second areas comprise width X2, and wherein a plurality of detectors comprises m detectors, wherein m is at least three wherein each of the m detectors is disposed on said second element and is configured to sense said first and second states wherein said detectors are arranged in a direction respective to said first and second areas' longitude so as to sense said first and second states and provide a reading sequence of a Gray code scheme when said detectors are moved relatively to said first and second areas.