| abstract |
The present invention relates to a drug delivery device comprising a drug reservoir configured to contain a fluid drug, a syringe including a plurality of needle assemblies, a drive member, a pump, one or more springs, a loading button and a dosing button. The device is configured to load one or more springs with work performed by the user when actuating the load button. When the user actuates the dose button after actuating the charge button, the device is configured to (i) release the one or more loaded springs to operate the drive member, thereby bringing the needle assembly into operative alignment with the drive member Drive from the retracted position to the injection position, (ii) actuate the pump to pump fluid medication from the drug reservoir through the actuated needle assembly, and (iii) retract the actuated needle assembly from the injection position to the retracted position. |