CPC A61M 5/24 (2013.01) [A61M 5/1456 (2013.01); A61M 5/1458 (2013.01); A61M 5/14546 (2013.01); A61M 2005/2013 (2013.01); A61M 2205/50 (2013.01)] | 12 Claims |
1. A drug injection system comprising a cartridge adapter and a drug injection device, wherein;
the cartridge adapter comprises:
a cartridge holder having a space that can accommodate therein a drug cartridge, the drug cartridge including a cylinder having a tubular internal space extending in a longitudinal direction, a gasket supported in the internal space so as to be movable in the longitudinal direction, and a drug held in the internal space;
a piston that moves the gasket in the longitudinal direction in the internal space of the cylinder;
a piston guide that movably supports the piston and connected to the cartridge holder; and
a piston driving mechanism that drives the piston in the longitudinal direction, and
the drug injection device comprises:
a casing having an adapter space in which the cartridge adapter can be loaded, and an opening that communicates with the adapter space;
a driver that is in engagement with the piston driving mechanism of the cartridge adapter loaded in the adapter space and transmit a driving force;
an arithmetic circuit that controls the driver; and
a memory,
the piston driving mechanism of the cartridge adapter includes:
a male thread located on an outer circumference of the piston; and
a piston gear having an inner surface on which a female thread that meshes with the male thread is located and an outer surface on which gear teeth are disposed,
the driver includes a motor and a drive gear that rotates by receiving a driving force from the motor; and
in a state in which the cartridge adapter is loaded in the adapter space, the drive gear of the driver meshes with the piston gear of the piston driving mechanism.
|