Drug delivery device
The disclosure relates to a drug delivery device including a plunger disposed within a case and an audible indicator that comprises a resilient element. The plunger is slidable from a proximal position to a distal position within the case and the resilient element is in a first configuration when the plunger is in the proximal position, such that the resilient element is deflected radially outwards to a second configuration during movement of the plunger from the proximal position towards the distal position. The resilient element moves from the second configuration towards the first configuration when the plunger moves towards or reaches the distal position, thereby generating an audible and tactile signal.
1. A drug delivery device comprising:
a plunger disposed within a case, wherein the plunger is configured to slide from a proximal position to a distal position within the case,
an audible indicator that comprises a resilient element, wherein
the resilient element is configured to be in a first configuration when the plunger is in the proximal position,
the resilient element is configured to deflect radially outwards to a second configuration during movement of the plunger from the proximal position towards the distal position, and
the resilient element is configured to move from the second configuration towards the first configuration when the plunger moves towards or reaches the distal position, the resilient element thereby generating an audible signal.
2. The drug delivery device according to claim 1 , wherein the resilient element is a leaf spring comprising a proximal spring section coupled to a distal spring section of the leaf spring.
3. The drug delivery device according to claim 1 , wherein the resilient element is S-shaped.
4. The drug delivery device according to claim 2 , wherein the proximal spring section is fixed to the case, and wherein a distal spring end is configured as a free end of the resilient element.
5. The drug delivery device according to claim 2 , wherein the distal spring section is bent radially inwards towards the plunger with respect to the proximal spring section.
6. The drug delivery device according to claim 2 , wherein a distal spring end comprises a hook bent radially outwards with respect to the distal spring section.
7. The drug delivery device according to claim 1 , wherein the resilient element is radially spaced from a distal plunger section of the plunger.
8. The drug delivery device according to claim 1 , wherein the resilient element comprises a single metal component.
9. The drug delivery device according to claim 2 , wherein the resilient element is configured to remain in the first configuration during movement of the plunger until a proximal plunger section abuts the distal spring section.
10. The drug delivery device according to claim 2 , wherein the resilient element is configured to bend radially outwards to the second configuration when a proximal plunger section abuts the distal spring section.
11. The drug delivery device according to claim 2 , wherein the resilient element is configured to move towards the first configuration when a proximal plunger section passes the distal spring section.
12. The drug delivery device according to claim 1 , wherein the drug delivery device is an autoinjector device comprising:
the case adapted to hold a medicament container,
a needle shroud telescopically coupled to the case,
a shroud spring biasing the needle shroud distally relative to the case, and
a drive spring biasing the plunger from the proximal position towards the distal position for delivering a medicament from the medicament container.
13. The drug delivery device according to claim 12 , wherein the case comprises a syringe support configured to support an axial position of the medicament container relative to the case, and wherein the syringe support comprises at least two support arms.
14. The drug delivery device according to claim 13 , wherein the at least two support arms have different lengths.
15. The drug delivery device according to claim 13 , wherein the resilient element is coupled to the syringe support in a manner extending distally from one of the at least two support arms.
16. The drug delivery device according to claim 1 , comprising a medicament container containing a pharmaceutically active compound.
17. The drug delivery device according to claim 1 , wherein the resilient element is further configured to generate a tactile signal by impacting a section of the plunger when moving from the second configuration towards the first configuration when the plunger moves towards or reaches the distal position.
18. The drug delivery device according to claim 1 , wherein the audible signal indicates the completion of a medicament delivery.
19. A drug delivery device comprising:
a plunger disposed within a case, the plunger being configured to move axially from a proximal position to a distal position within the case; and
an audible indicator that comprises a resilient element, wherein
the resilient element is configured to be in a first configuration when the plunger is in the proximal position,
the resilient element is configured to deflect radially outwards to a second configuration during movement of the plunger from the proximal position towards the distal position,
the resilient element is configured to move from the second configuration towards the first configuration when the plunger moves towards or reaches the distal position, the resilient element thereby generating an audible signal, and
the resilient element is a leaf spring comprising a proximal spring section coupled to a distal spring section of the leaf spring.
20. The drug delivery device according to claim 19 , wherein the audible signal indicates the completion of a medicament delivery.