Medicament delivery device
The present invention relates to a medicament delivery device that is reliable, safe and intuitive to use and configured to prevent a subsequent does from being administered before a previously initialized dose has been fully delivered. This is accomplished by mechanically interacting structures arranged as an interface between a lockable delivery button and a release member.
1. A lockable drug delivery device, comprising:
a non-rotatable lockable delivery button, movable in a longitudinal direction;
a spring configured to bias the non-rotatable lockable delivery button toward a distal end of the lockable drug delivery device;
a first guide frame, comprising first and second longitudinally oriented parallel tracks and connected to each other by distal and proximal transversal tracks, wherein the first guide frame is disposed on an outer surface of the non-rotatable lockable delivery button; and
a non-rotatable release button coaxially arranged with at least a portion of the non-rotatable lockable delivery button,
the non-rotatable release button comprising a first guide member configured to interact with the first guide frame,
wherein the non-rotatable release button, in cooperation with the non-rotatable lockable delivery button, is only movable in a transversal direction between a first position,
in which the first guide member is generally aligned with the first longitudinally oriented parallel track of the first guide frame, and
a second position,
in which the first guide member is generally aligned with the second longitudinally oriented track of the first guide frame, and
the first guide frame configured to maintain the non-rotatable lockable delivery button in a locked position until the non-rotatable release button is moved to the second position.
2. The lockable drug delivery device of claim 1 , wherein
the first and second longitudinally oriented parallel tracks of the first guide frame are separated by a longitudinally oriented wall.
3. The lockable drug delivery device of claim 1 , wherein
the non-rotatable release button comprises a resilient element,
wherein the resilient element is configured to bias the non-rotatable release button in the transversal direction towards the first position.
4. The lockable drug delivery device of claim 3 ,
wherein the resilient element is configured to permanently bias the non-rotatable release button in the transversal direction towards the first position.
5. The lockable drug delivery device of claim 3 ,
wherein the resilient element comprises a flexible finger.
6. The lockable drug delivery device of claim 3 ,
wherein the resilient element comprises a coil spring.
7. The lockable drug delivery device of claim 1 , wherein
the first guide member of the non-rotatable release button comprises a flexible tongue.
8. The lockable drug delivery device of claim 1 , wherein
the first guide member of the non-rotatable release button comprises a cut-out.
9. The lockable drug delivery device of claim 1 , wherein
the first guide member is arranged to project into the
the first and second longitudinally oriented tracks.
10. The lockable drug delivery device of claim 1 , wherein
the non-rotatable lockable delivery button, in cooperation with the non-rotatable release button, is movable in the longitudinal direction between
a depressed position, in which the first guide member is generally aligned with a distal transversal track, and
a released position, in which the first guide member is generally aligned with the proximal transversal track.
11. The lockable drug delivery device of claim 10 , wherein
the distal transversal track comprises a longitudinally aligned ramp configured to interact with the first guide member so as to allow movement of the non-rotatable release button from the first position to the second position.
12. The lockable drug delivery device of claim 11 , wherein
the first longitudinally oriented parallel track includes a first transversally aligned step ramp at a distal end of a longitudinally oriented wall and a second transversally aligned step ramp at a proximal end of the longitudinally oriented wall,
the first and second transversally aligned step ramps are configured to interact with the first guide member to allow movement of the non-rotatable lockable delivery button toward the depressed position and to prevent the non-rotatable lockable delivery button from return movement toward the released position.
13. The lockable drug delivery device of claim 1 wherein
the non-rotatable lockable delivery button is movable only in the longitudinal direction.
14. The lockable drug delivery device of claim 1 wherein
the spring is configured to permanently longitudinally bias the non-rotatable lockable delivery button toward the distal end of the lockable drug delivery device.
15. The lockable drug delivery device of claim 1 further comprising
a second guide frame, the second guide frame comprising first and second longitudinally oriented parallel tracks separated by a longitudinally oriented wall and connected to each other by distal and proximal transversal tracks,
wherein the second guide frame is disposed on the outer surface of the non-rotatable lockable delivery button.
16. The lockable drug delivery device of claim 15
wherein the non-rotatable lockable release button further comprises a second guide member configured to interact with the second guide frame,
wherein the non-rotatable lockable release button, in cooperation with the non-rotatable lockable delivery button, is only movable in a transversal direction between a first position,
in which the second guide member is generally aligned with the first longitudinally oriented parallel track of the second guide frame, and a second position,
in which the second guide member is generally aligned with the second longitudinally oriented track of the second guide frame, and
the second guide frame is configured to prevent delivery of a subsequent dose before a previous dose has been fully delivered.