Medicament delivery devices

摘要

A medicament delivery device comprises a housing, a holder within the housing for receiving a medicament cartridge, a piston rod for driving a bung of the medicament cartridge, a drive mechanism including a motor for providing an output drive to the piston rod for delivering the medicament and control means for controlling operation of the device. The device is additionally provided with a bung sensor for sensing when the piston rod is in contact with the bung and the control means is operative for advancing the drive of the piston rod towards the bung.

主权项

1. A medicament delivery device for delivering a medicament to a patient, wherein the medicament delivery device comprises:
a housing; a holder within the housing for receiving and enclosing a medicament cartridge, where the holder is configured as a door that pivots from an open position to a closed position and is not detachable from the housing; a piston rod having a distal end for driving a bung of the medicament cartridge; a drive mechanism including a motor for providing an output drive to the piston rod for delivering the medicament; a control means for controlling operation of the device; a bung sensor provided at the distal end of the piston rod for sensing when the piston rod is in contact with the bung; a latch sensor configured to engage a stop on the holder and to sense whether the holder is in the closed position or the open position, where the stop is located at an end of an arm connected to the holder, where the stop is configured to limit outward pivoting of the holder when in the open position; and a cartridge sensor configured to sense when a medicament cartridge is in the holder; wherein the control means is operative for advancing the drive of the piston rod towards the bung when the latch sensor senses the holder is in the closed position and the cartridge sensor senses the presence of a medicament cartridge is in the holder.