Dosing mechanism for a drug deliver device

摘要

A maximum settable dose feature is disclosed that is set by a user or health care professional one time that prevents future injections from exceeding the desired maximum dose. The feature includes a locking band initially in an unlocked configuration, which transforms to a locked configuration when activated after setting a desired maximum dose. The feature can include a trigger mechanism to transform the locking band to the locked configuration.

主权项

1. A maximum settable dose feature for a drug delivery device comprising, in combination,
a) a movable dose setting component configured to move in a first direction and a reverse direction opposite the first direction to set a first dose; b) a locking band having an unlocked configuration in rotational or linear engagement with the dose setting component and a locked configuration that provides a permanent stop for the dose setting component; c) a collar engaged with the dose setting component such that the collar moves proximal with the dose setting component; wherein the locking band in the unlocked configuration is engaged with the collar such that it moves in a proximal direction during the setting of the first dose and is configured to transition from the unlocked to the locked configuration after a first dose is set and when the collar is disengaged from the locking member and moved in a distal direction, and wherein the locking band is further configured to transition from the unlocked configuration to the locked configuration when disengaged from the dose setting component as a result of the dose setting component being rotated or linearly moved in the reverse direction.