Drug delivery device with biasing track for transmitting load to rotatable drive member enabling subsequent dose dispense

摘要

A drive member for driving a piston rod in a drug delivery device is provided. The drive member is configured to be driven in a rotational movement by an actuating member. The drive member comprises a track for transmitting a driving load from the actuating member to the drive member. The track comprises both sections running in a distal and sections running in a proximal direction of the drive member. Moreover, a drug delivery device comprising such a drive member is provided.

主权项

1. A drug delivery device comprising a drive member and an actuating member for driving the drive member, where the drive member comprises a longitudinal axis having a distal direction and a proximal direction,
wherein the drive member is configured to be driven in a rotational movement around the longitudinal axis by an actuating member, wherein the drive member comprises a track having a contact face for transmitting a driving load from the actuating member to the drive member, wherein the track comprises sections running in the distal direction and sections running in the proximal direction of the drive member, wherein the drive member comprises a bias track having a contact face for transmitting a load from a component of a biasing means to the drive member for biasing the drive member towards a rotation around the longitudinal axis, wherein the device being configured to dispense a dose of a drug in a dose dispense operation as well as being configured to be prepared for a subsequent dose dispense operation in a dose set operation, wherein the biasing means is configured to bias the drive member at one end of the dose set operation and the dose dispense operation towards the rotation around the longitudinal axis, and wherein at the one end of the dose set operation the bias exerted by the biasing means results in a rotation of the drive member towards a position relative to the actuating member such that the subsequent dose dispense operation is enabled.