US 12,076,537 B2
Injection device and detector arrangement
Oliver Charles Gazeley, Warwick (GB); Gavin Newman, Warwick (GB); Aidan Michael O'Hare, Warwick (GB); David Aubrey Plumptre, Warwick (GB); Robert Veasey, Warwick (GB); Craig Ashley Mason, Warwick (GB); and Anthony Paul Morris, Warwick (GB)
Assigned to Sanofi, Paris (FR)
Appl. No. 17/299,931
Filed by Sanofi, Paris (FR)
PCT Filed Dec. 16, 2019, PCT No. PCT/EP2019/085294
§ 371(c)(1), (2) Date Jun. 4, 2021,
PCT Pub. No. WO2020/127006, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18306710 (EP), filed on Dec. 18, 2018.
Prior Publication US 2022/0152312 A1, May 19, 2022
Int. Cl. A61M 5/315 (2006.01)
CPC A61M 5/31535 (2013.01) [A61M 5/31526 (2013.01); A61M 5/31528 (2013.01); A61M 5/31546 (2013.01); A61M 5/31568 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/6027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An injection device for setting and injecting pre-set or user-selectable doses of a medicament, the injection device comprising:
an elongated housing defining a longitudinal direction and configured to accommodate a cartridge containing the medicament;
a detector arrangement operable to detect a relative movement between a first element and a second element,
wherein the first element is subject to a first movement relative to the second element along a first longitudinal direction for setting of a dose, wherein the first element is subject to a second movement relative to the second element along a second longitudinal direction for dispensing of the dose, wherein one of the first movement and the second movement is a helical movement, and wherein the other one of the first movement and the second movement is a sliding movement in the longitudinal direction,
wherein the second element comprises at least one reference element fixed to the second element,
wherein the first element comprises a tubular shaped surface provided with a pattern facing towards the reference element,
wherein the detector arrangement comprises at least one electric sensor arranged on one of the first element and the second element and being operable to detect a positional variation of the pattern relative to the at least one reference element and to generate at least one electric signal in response to the positional variation of the pattern during at least one of the first movement and the second movement of the first element relative to the second element.