Drug delivery device with electro-mechanic drive mechanism

摘要

The present invention relates to a drug delivery device for setting and dispensing of a dose of a medicament is presented comprising a housing to accommodate a cartridge filled with the medicament, an electrically operated drive mechanism to be operably engaged with the cartridge to expel a predefined dose of the medicament from the cartridge, and at least one dose element displaceably arranged relative to the housing to set and/or to dispense the dose of the medicament, wherein the dose element and the drive mechanism are mechanically decoupled from each other.

主权项

1. A drug delivery device for setting and dispensing of a dose of a medicament comprising:
a housing configured to accommodate a cartridge filled with the medicament, an electrically operated drive mechanism to be operably engaged with the cartridge configured to expel a predefined dose of the medicament from the cartridge, wherein the drive mechanism comprises at least a piston rod to operably engage with a piston of the cartridge and wherein the piston rod is displaceable by an electro-mechanical drive, at least one dose element translationally displaceably arranged relative to the housing and configured to set, to actuate, or to set and actuate dispensation of the dose of the medicament via displacement of the at least one dose element relative to the housing, wherein an axial position of the dose element relative to the housing is indicative of the size of the dose to be injected by the device, at least one sensor configured to detect the displacement and transmit an indication of the displacement to the drive mechanism, wherein the dose element and the drive mechanism are mechanically separated and decoupled from each other such that there is no mechanical linkage between the dose element and the drive mechanism at least one force sensor to determine a force acting on the dose element during dose injection and wherein an automated injection procedure powered by the electro-mechanical drive is controlled by the force sensor and wherein a dispensing action of the drive mechanism is controllable by the magnitude of a force acting on the dose element.