Self-administration device for liquid medicines

摘要

A liquid medicine self-administration device which is capable of administering a liquid medicine to a patient in a single shot and with which the refilling of the liquid medicine can be performed by a one-touch operation. The device includes a casing (1) having two open ends, a port portion (2) closing one of the open ends of the casing, a reservoir (3) attached to the port portion (2) and capable of being easily deformed by pressing and being restored to its original shape. A pushing means (4) is slidably inserted into the other open end of the casing (1) and is adapted to press and deform the reservoir (3). The pushing means (4) comprises a cylindrical member (41) inserted into the casing (1) so as to be able to slide along the inner wall of the casing (1) and a spring (42) housed within the cylindrical member (41). The device operates such that when the cylindrical member (41) is pushed down by the pushing means (4), the cylindrical member (41) is automatically held in engagement with an engaging hook (5) while engagement of the cylindrical member (41) with the engaging hook is released by a push-button operation.