US 12,453,822 B2
Auto-injector with audio indicator
Nicolas Besson, Treffort (FR)
Assigned to Becton Dickinson France, Le Pont de Claix (FR)
Appl. No. 17/425,982
Filed by Becton Dickinson France, Le Pont-de-Claix (FR)
PCT Filed Feb. 26, 2020, PCT No. PCT/EP2020/055006
§ 371(c)(1), (2) Date Jul. 27, 2021,
PCT Pub. No. WO2020/173993, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 19305224 (EP), filed on Feb. 26, 2019.
Prior Publication US 2022/0152309 A1, May 19, 2022
Int. Cl. A61M 5/315 (2006.01)
CPC A61M 5/3157 (2013.01) [A61M 5/31505 (2013.01); A61M 2205/581 (2013.01); A61M 2205/583 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A drug delivery device comprising:
a housing;
a syringe assembly comprising a barrel, a stopper, and a cannula, at least a portion of the syringe assembly positioned within the housing;
a drive assembly comprising a plunger body configured to move the stopper within the barrel upon actuation of the drive assembly, at least a portion of the drive assembly positioned within the housing, the plunger body having a pre-use position prior to movement of the plunger body, an injection position where the plunger body moves the stopper within the barrel, and a post-use position where movement of the plunger body has stopped;
an audio indicator member connected to the plunger body, and
a syringe holder moveable relative to the housing, wherein the audio indicator member is configured to restrict movement of the syringe holder when the plunger body is in the pre-use position;
wherein the housing comprises a rib extending in a longitudinal direction of the device, the audio indicator member engaging the rib when the plunger body is in the injection position to deflect the audio indicator member from an unbiased position to a biased position, the audio indicator member disengaging from the rib and contacting a portion of the housing when the plunger body reaches the post-use position to cause an audible indication of a transition of the plunger body from the injection position to the post-use position.