Patent ID: 9155844
Filing Date: 2015-10-13
Classification: A61M,F04C,Y10T

Abstract:
1. An injection device for administering a dose of a liquid medicament comprising a syringe containing the dose of the liquid medicament a hollow injection needle adapted to penetrate skin of a patient, a stopper translatably disposed within the syringe, a plunger connectable to the stopper and translatable in at least a proximal direction to displace the stopper in the proximal direction , and a releasable noise component capable of, upon release, generating an audible and tactile feedback, wherein a proximal displacement of the stopper causes the dose of the liquid medicament to be expelled through the hollow injection needle and the noise component is released when the plunger reaches a position relative to the syringe in which the stopper is located in proximity of a proximal end of the syringe, wherein the released noise component impacts on a component of the injection device to generate the audible and tactile feedback indicating an end of an injection, wherein the component of the injection device, upon which the released noise component impacts, comprises at least part of a trigger button, wherein the generated tactile feedback is transmitted though the trigger button and is provided to a user by the trigger button, wherein the syringe is translatably arranged with respect to a case of the injection device and a noise release mechanism couples the noise component to a translatory movement of the syringe until the release of the noise component, wherein the noise release mechanism comprises a resilient arm that is deflectable in a radial outward direction to release the noise component, wherein a distal plunger sleeve of the plunger abuts against the resilient arm in the radial outward direction to prevent the release of the noise component until the stopper connectable to the plunger is located in proximity of the proximal end of the syringe, and wherein the noise component comprises an elongate portion with an outward ramp that is engaged by a ramped inward boss of the resilient arm and an outward deflection of the resilient arm causes disengagement of the outward ramp from the ramped inward boss.