Audible indicator for a drug delivery device
The disclosure relates to a drug delivery device, comprising a mechanical audible indicator capable of producing an audible signal with a volume of at least 100 dB.
1 . A drug delivery device comprising:
a mechanical audible indicator configured to produce an audible signal with a volume of at least 100 dB, the mechanical audible indicator comprising a resilient force member having a first stable state in which the resilient force member stores mechanical energy and a second stable state in which the resilient force member has deformed and the mechanical energy has been released,
wherein the mechanical audible indicator is configured to produce the audible signal with the volume of at least 100 dB when the resilient force member transitions from the first stable state to the second stable state.
2 . The drug delivery device of claim 1 , wherein the mechanical audible indicator comprises one or more mechanical components configured to produce the audible signal, and the volume of the audible signal is at least 100 dB (A) at a distance of 150 mm away from the drug delivery device,
wherein one mechanical component of the one or more mechanical components is the resilient force member supported in a biased state by an element of the drug delivery device to prevent transition of the resilient force member into a relaxed state.
3 . The drug delivery device of claim 1 , wherein the resilient force member is configured to be inserted into a rear housing of the drug delivery device.
4 . The drug delivery device of claim 1 , wherein the resilient force member is arranged such that a longitudinal axis of the resilient force member is parallel with a longitudinal axis of the drug delivery device.
5 . The drug delivery device of claim 1 , wherein the resilient force member comprises one or more tabs configured to be engaged to a number of corresponding openings in a housing of the drug delivery device.
6 . The drug delivery device of claim 1 , wherein the resilient force member is configured to be supported in the first stable state by a flexible arm of the drug delivery device to prevent a transition of the resilient force member from the first stable state into the second stable state.
7 . The drug delivery device of claim 1 , wherein the mechanical audible indicator is configured to be activated by a movement of a plunger.
8 . The drug delivery device of claim 7 , wherein the mechanical audible indicator is configured to be activated by the movement of the plunger towards a distal position at an end of a medicament delivery process.
9 . The drug delivery device of claim 1 , wherein the resilient force member comprises a leaf spring having a longitudinal axis, and the resilient force member is bent by a predetermined angle about the longitudinal axis to form two angled wing-shaped sections that are angled relative to each other by the predetermined angle.
10 . The drug delivery device of claim 9 , wherein the resilient force member is a bi-stable resilient force member and the predetermined angle is between 130 degrees and 160 degrees.
11 . The drug delivery device of claim 1 , wherein the audible signal is generated without the resilient force member hitting a component of the drug delivery device.
12 . The drug delivery device of claim 1 , wherein a free end of the mechanical audible indicator is in a plastically deformed state while the drug delivery device is in a pre-use state.
13 . The drug delivery device of claim 1 , wherein the drug delivery device is an auto-injector comprising a control subassembly, wherein the control subassembly comprises a slidable needle shroud configured to cover a needle that is used to deliver a drug by using the drug delivery device.
14 . The drug delivery device of claim 1 , wherein the resilient force member comprises a proximal spring section that is configured to be supported by a supporting protrusion arranged on a rear housing of the drug delivery device.
15 . The drug delivery device of claim 1 , comprising a housing that comprises a supporting protrusion configured to releasably support the resilient force member to hold the resilient force member in the first stable state.
16 . A drug delivery device comprising:
a mechanical audible indicator configured to produce an audible signal with a volume of at least 100 dB,
wherein the mechanical audible indicator comprises a resilient force member configured to reside in two or more states, each state of the two or more states having a respective conformation,
wherein, in a relaxed state, the resilient force member is relaxed in a first conformation, wherein, in a biased state, the resilient force member is biased to store energy in a second conformation different than the first conformation,
wherein the resilient force member is configured to release stored energy that is stored by deflecting the resilient force member to generate the audible signal when the resilient force member transitions from the biased state into the relaxed state due to a transition from the second conformation to the first conformation, and
wherein the audible signal is generated without the resilient force member hitting a component of the drug delivery device.
17 . The drug delivery device of claim 16 , wherein the resilient force member comprises a leaf spring having a longitudinal axis, and the resilient force member is bent by a predetermined angle about the longitudinal axis to form two angled wing-shaped sections that are angled relative to each other by the predetermined angle.
18 . The drug delivery device of claim 17 , wherein the resilient force member is a bi-stable resilient force member and the predetermined angle is between 130 degrees and 160 degrees.
19 . The drug delivery device of claim 16 , wherein the resilient force member comprises one or more tabs configured to engage with one or more openings of a case of the drug delivery device.
20 . The drug delivery device of claim 16 , wherein the volume of the audible signal is at least 100 dB (A) at a distance of 150 mm away from the drug delivery device.