Medicament injection device

Patent metadata

Field	Value
Publication number	US-12397118-B2
Application number	US-202318540467-A
Country	US
Kind code	B2
Filing date	Dec 14, 2023
Priority date	Nov 23, 2017
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

The present disclosure relates to medicament injection devices. An injection device includes: a movable dosage programming component comprising a rotary encoder system having a predefined angular periodicity, a sensor arrangement including a first optical sensor configured to detect movement of the movable dosage programming component relative to the sensor arrangement during dosing of a medicament, wherein the first optical sensor is configured to operate in a strobe-sampling mode at a first frequency, a second optical sensor configured to detect movement of the rotary encoder system relative to the second optical sensor wherein the second optical sensor is configured to operate in a strobe-sampling mode at a second frequency lower than the first frequency, and a processor arrangement configured to, based on the detected movement, determine a medicament dosage administered by the injection device.

First claim

The invention claimed is:

1. An injection device comprising:
a movable dosage programming component comprising a rotary encoder system having a predefined angular periodicity, the rotary encoder system comprising an encoder ring comprising specially adapted regions;
a sensor arrangement comprising a first sensor and a second sensor, the first sensor and the second sensor being configured to target the specially adapted regions of the encoder ring to detect movement of the movable dosage programming component relative to the sensor arrangement during dosing of a medicament wherein the first sensor and the second sensor are arranged with an angular offset; and
a processor arrangement configured to, based on said detected movement, determine a medicament dosage administered by the injection device.

2. The injection device of claim 1 , wherein the rotary encoder system is configured to be rotatable with respect to the first sensor during a dialing mode of operation of the injection device.

3. The injection device of claim 1 , wherein the encoder ring comprises a plurality of flags arranged circumferentially around the encoder ring in accordance with the predefined periodicity.

4. The injection device of claim 1 , wherein the angular offset of the first sensor and the second sensor is equal to half the predefined angular periodicity, and wherein the first sensor and the second sensor are configured to operate in a synchronous mode of operation.

5. The injection device of claim 1 , wherein the angular offset of the first sensor and the second sensor differs from half the predefined angular periodicity, and wherein the first sensor and the second sensor are configured to operate in a staggered mode of operation with an offset time between sampling by the first sensor and the second sensor.

6. The injection device of claim 5 , wherein the angular offset is less than half the predefined angular periodicity.

7. The injection device of claim 5 , wherein the offset time is varied based on a relative rotational speed of rotary encoder system with respect to the first sensor and the second sensor.

8. The injection device of claim 7 , wherein the offset time is decreased in response to an increase in relative rotational speed.

9. The injection device of claim 1 , further comprising an injection button and an electrical switch connected to the sensor arrangement, the electrical switch arranged to supply power to the sensor arrangement.

10. The injection device of claim 1 , further comprising a medicament containing cartridge.

11. A module configured to be used with or applied to an injection device comprising a movable dosage programming component with a rotary encoder system, the rotary encoder system comprising an encoder ring comprising specially adapted regions, the module comprising:
a sensor arrangement comprising at least a first sensor and a second sensor being configured to target the specially adapted regions of the encoder ring to detect movement of the movable dosage programming component of the injection device relative to the sensor arrangement during dosing of a medicament, wherein the first sensor and the second sensor are arranged with an angular offset; and
a processor arrangement configured to, based on said detected movement, determine a medicament dosage administered by the injection device.

Assignees

• Sanofi Sa

Inventors

• Schabbach Michael
• Morris Anthony Paul
• Smith Ronald Antony
• Molyneux Brian Charles
• Draper Paul Richard
• Mason Craig Ashley
• Gazeley Oliver Charles
• Clark Daniel Edward
• Plumptre David Aubrey
• O'Hare Aidan Michael
• Thomas Richard James
• Kramer Felix
• Wyss Beat
• Müller Philipp

Classifications

• A61M2205/8212

  with means or measures taken for minimising energy consumption · CPC title

• A61M2205/581

  by audible feedback · CPC title

• A61M2205/52

  with memories providing a history of measured variating parameters of apparatus or patient · CPC title

• A61M2205/3584

  using modem, internet or Bluetooth® · CPC title

• A61M2205/3306

  Optical measuring means · CPC title