Medicament delivery device and actuation mechanism for a drug delivery device

摘要

Described is an actuation mechanism for a medicament delivery device having a needle with a distal tip. The actuation mechanism comprises an outer sleeve telescopically relative to the delivery device and an inner sleeve telescopically arranged relative to the outer sleeve. The outer sleeve is axially translatable relative to the delivery device, and the inner sleeve is axially translatable relative to the outer sleeve. In a first state, the inner sleeve protrudes distally from the outer sleeve and the outer sleeve protrudes distally from the delivery device. In a second state, the inner sleeve is contained within the outer sleeve. Movement of the outer sleeve proximally relative to the delivery device in the second state initiates delivery of a medicament in the delivery device.

主权项

1. An actuation mechanism for a medicament delivery device having a needle with a distal tip, the actuation mechanism comprising:
an outer sleeve telescopically arranged relative to the delivery device, the outer sleeve axially translatable relative to the delivery device; an inner sleeve telescopically arranged relative to the outer sleeve, the inner sleeve axially translatable relative to the outer sleeve; a first spring element biasing the inner sleeve in a distal direction relative to the outer sleeve; and a second spring element biasing the outer sleeve in the distal direction relative to the delivery device; wherein, in a first state, the inner sleeve protrudes distally from the outer sleeve and the outer sleeve protrudes distally from the delivery device, wherein, in a second state, the inner sleeve is contained within the outer sleeve, and wherein movement of the outer sleeve proximally relative to the delivery device in the second state initiates delivery of a medicament in the delivery device.