| 摘要 |
The invention relates to an auto-injector (1) for administering a dose of a liquid medicament (M), comprising:
- an elongate case (12) arranged to be held by a user,
- a tubular chassis (2) telescoped in the case (12) and biased against the case (12) so as to protrude from the case (12),
- a syringe (3) with a hollow injection needle (4), a drive spring (8) and a plunger (9) for forwarding load of the drive spring (8) to a stopper (6) of the syringe (3),
- a trigger button (13) distally arranged in or on the case (12),
wherein the trigger button (13) is initially coupled to the case (12) in a manner to protrude distally from the case (12) and interlocked to the chassis (2) in a manner preventing the trigger button (13) from disengaging the case (12) and thus preventing actuation of the trigger button (13) in an initial position, wherein the case (12) is arranged to translate in the proximal direction (P) against the bias relative to the chassis (2) when the chassis (2) is pressed against an injection site thereby also translating the trigger button (13) releasing the interlock to the chassis (2) so as to allow actuation of the trigger button (13), wherein the trigger button (13) is arranged to lock in a more proximal position on actuation. |
