Injection device comprising an optical sensor
First Claim
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1. An arrangement for determining the position of a dose setting member adapted to set a dose of a medicament to be injected from an injection device, the arrangement comprising:
- a rotatably mounted member having a plurality of optically coded tracks arranged on an outer surface thereof adapted to set a dose of medicament to be injected from an injection device,a plurality of light generators each for generating a beam of light towards the rotatably mounted member,structure for guiding light beams from the plurality of light generators to the rotatably mounted member and structure for guiding light beams from the rotatably mounted member to a plurality of light sensitive elements or areas,a control circuit coupled to the plurality of light sensitive elements or areas to determine the position of the rotatably mounted member relative to the plurality of light sensitive elements or areas, andwhereby the arrangement is structured to determine the position of a dose setting member relative to the plurality of light sensitive elements or areas.
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Abstract
The present invention relates to an injection device comprising an optically-based sensor for determining the position or setting of a dose setting member arranged to set a dose to be injected from the injection device. In particular, the present invention relates to an injection device comprising a rotatably mounted member having a plurality of optically coded paths arranged on an outer surface thereof. The rotatably mounted member is operatively connected to the dose setting member and is adapted to rotate with the dose setting member.
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Citations
34 Claims
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1. An arrangement for determining the position of a dose setting member adapted to set a dose of a medicament to be injected from an injection device, the arrangement comprising:
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a rotatably mounted member having a plurality of optically coded tracks arranged on an outer surface thereof adapted to set a dose of medicament to be injected from an injection device, a plurality of light generators each for generating a beam of light towards the rotatably mounted member, structure for guiding light beams from the plurality of light generators to the rotatably mounted member and structure for guiding light beams from the rotatably mounted member to a plurality of light sensitive elements or areas, a control circuit coupled to the plurality of light sensitive elements or areas to determine the position of the rotatably mounted member relative to the plurality of light sensitive elements or areas, and whereby the arrangement is structured to determine the position of a dose setting member relative to the plurality of light sensitive elements or areas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An arrangement for determining an amount of a medicament injected from an injection device, the arrangement comprising:
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a rotatably mounted member having a plurality of optically coded tracks arranged on an outer surface thereof, a plurality of light generators each for generating a beam of light towards the rotatably mounted member, structure for guiding light beams from the plurality of light generators to the rotatably mounted member and structure for guiding light beams from the rotatably mounted member to a plurality of light sensitive elements or areas, a control circuit coupled to the plurality of light sensitive elements or areas to determine the position of the rotatably mounted member relative to the plurality of light sensitive elements or areas, and whereby the arrangement is structured to determine an amount of a medicament injected from an injection device. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification