AUDIO INDICATOR Russian patent published in 2020 - IPC A61M5/20 A61M5/24 A61M5/32 A61M5/48 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical equipment. Sound indicator for use with a drug delivery device comprises a monostable resilient pressure element configured to stay in two states characterized by two different configurations. In the non-stressed state, the resilient pressure member is relaxed in the first configuration. In the deflected state, the resilient pressure member is deflected to accumulate energy in a second configuration different from the first one, while maintaining a low holding force which is less than the maximum force for converting from the non-stressed state into the deflected state. Resilient pressure element releases stored energy with creation of sound signal at transition from deflected state to non-stressed state as a result of transition from second configuration to first one. Resilient pressure element is supported by retaining element in deflected state to prevent transition into non-stressed state.

EFFECT: reliable indication of drug delivery end.

15 cl, 40 dwg