Autoinjection devices

摘要

An autoinjection device has front and rear separable assemblies (10) and (12). The rear assembly contains a drive assembly which is triggered or unlatched by rearward movement of an actuating sleeve (14) extending from the front assembly. A locking dial (16) is provided which locks the actuating sleeve against rearward movement until the dial is moved to an unlocked position. The dial automatically returns to a locked position upon initial rearward movement of the actuating member (14), so that, when the actuating member (14) moves forwardly after completion of an injection, it locks out to shroud the needle of the autoinjection device. The docking dial can be made integral with the actuating member (14) in an alternative embodiment.

主权项

1. An autoinjection device, comprising:
a main body adapted in use to receive a syringe configured for longitudinal movement with respect to said main body between a rearward and a forward position; a drive mechanism in said main body, the drive mechanism comprising a drive spring, a drive member longitudinally moveable within the main body, and a latch for latching the drive member in a primed position, the drive mechanism configured for being fired to drive said syringe forwardly relative to said main body to cause a needle at a forward end of said syringe to penetrate flesh of a user and inject a dose from said syringe in use; an actuating member comprising a needle shroud portion in a forward portion of said main body, the actuating member being operable to release said latch, the actuating member being moveable with respect to the main body from a first position in which the needle is shrouded by said needle shroud portion, to a second position in which said drive mechanism is fired, wherein upon completion of an injection from the syringe, return of the actuating member to its first position shrouds the needle with the needle shroud portion; and a locking member associated with said actuating member, the locking member configured for preventing said actuating member from reaching its second position when the locking member is in a locked position, the locking member and the actuating member being moveable relative to each other, wherein when the actuating member is in its first position, the locking member is moveable between its locked position in which the locking member prevents the actuating member from being moved, and an unlocked position in which the actuator member is free to move, and wherein on moving said locking member to its unlocked position, and after moving said actuating member to its second position, return of said actuating member to its first position is accompanied by return of said locking member to its locked position.