PHARMACEUTICAL INJECTION DEVICE

摘要

The pharmaceutical injection device comprises a syringe mounting portion configured to mount thereon a syringe containing a drug, the syringe including at a front end side thereof an injection needle mounting portion on which an injection needle is mounted and a gasket at a rear end side thereof, a plunger operable to press the gasket in the syringe mounted on the syringe mounting portion toward the injection needle mounting portion, a motor operable to drive the plunger, an encoder operable to detect a rotation amount of the motor, and a controller connected to the encoder and operable to control a driving of the motor. The controller is operable to obtain a motor rotation amount that corresponds to a deformation amount of the gasket deformed by the plunger, and control a rotation of the motor at a time of injection of the drug in accordance with the motor rotation amount.

主权项

1. A pharmaceutical injection device comprising:
a syringe including a first end side, a second end side, an injection needle mounting portion, an elastic member, and a drug; the injection needle mounting portion disposed at the first end side of the syringe; the elastic member disposed at the second end side of the syringe; a syringe mounting portion configured to mount the syringe; a plunger operable to press the elastic member toward the injection needle mounting portion and deform the elastic member; a motor operable to drive the plunger; an encoder operable to detect a rotation amount of the motor; a controller connected to the encoder and operable to:
control a driving of the motor,obtain a first motor rotation amount, andcontrol a rotation of the motor at a time of drug injection; the first motor rotation amount corresponding to a deformation amount of the elastic member; and the rotation of the motor at a time of drug injection being in accordance with the first motor rotation amount.