Drive Assembly, Drive Component and Drug Delivery Device

A drive assembly for a drug delivery device, the drive assembly comprising:

• a housing having a proximal end and a distal end,
• a rotation member being configured to be rotated in a first direction with respect to the housing during setting of a dose of a drug and to be rotated in a second direction with respect to the housing during delivery of the dose, the second direction being opposite to the first direction,
• a drive component being configured to follow rotational movement of the rotation member in the second direction during delivery of the dose,
• a stop member being configured to prevent rotational movement of the drive component in the first direction with respect to the housing and to permit rotational movement of the drive component in the second direction with respect to the housing,
• wherein the drive component comprises a first drive part and a second drive part, coupled to each other such that relative rotational movement of the first and second drive parts is prevented and relative axial movement is permitted,
• wherein the drive component comprises a biasing member for providing a force on at least one of the first and second drive parts for keeping at least one of the first and second drive parts in abutment with at least one of the rotation member and the stop member,
• wherein the biasing member forces the first and second drive parts apart in opposite axial directions, and
• wherein in axial direction the biasing member abuts both the first and second drive parts and is located between the first and second drive part.

A drug delivery device comprising:

• a drive assembly comprising:
• a housing having a proximal end and a distal end,
• a rotation member being configured to be rotated in a first direction with respect to the housing during setting of a dose of a drug and to be rotated in a second direction with respect to the housing during delivery of the dose, the second direction being opposite to the first direction,
• a drive component being configured to follow rotational movement of the rotation member in the second direction during delivery of the dose,
• a stop member being configured to prevent rotational movement of the drive component in the first direction with respect to the housing and to permit rotational movement of the drive component in the second direction with respect to the housing,
• wherein the drive component comprises a first drive part and a second drive part, coupled to each other such that relative rotational movement of the first and second drive parts is prevented and relative axial movement is permitted,
• wherein the drive component comprises a biasing member for providing a force on at least one of the first and second drive parts for keeping at least one of the first and second drive parts in abutment with at least one of the rotation member and the stop member,
• wherein the biasing member forces the first and second drive parts apart in opposite axial directions, and
• wherein in axial direction the biasing member abuts both the first and second drive parts and is located between the first and second drive part and
• a fixing member for attaching a drug reservoir.