Tubular rotator for a medicament delivery device and a medicament delivery device containing the same

A medicament delivery device comprising:

• a housing having a proximal end and a distal end,
• a medicament delivery member cover received by and rotationally interlocked with the housing, wherein the medicament delivery member cover is axially displaceable between an extended position relative to the housing and a retracted position, wherein the medicament delivery member cover is biased towards the extended position,
• a plunger rod axially biased towards the proximal end of the housing,
• a tubular rotator including a guide structure arranged to convert linear motion of the medicament delivery member cover to rotational motion of the tubular rotator, and a profiled distal edge periphery, wherein the tubular rotator is rotatable relative to the housing, and which tubular rotator is arranged to receive the plunger rod,
• a sensor arrangement axially biased towards the proximal end of the housing, which sensor arrangement abuts the profiled distal edge periphery of the tubular rotator,
• a rotatable indicator disc provided with at least two visually distinct circle sectors, and
• a distal end lid provided with an indicator disc opening for exposing only one of the at least two visually distinct circle sectors at a time,
• wherein the tubular rotator is initially arranged in a first rotational position in the extended position of the medicament delivery member cover, in which first rotational position the tubular rotator is arranged to prevent axial displacement of the plunger rod,
• wherein the guide structure is arranged to allow the tubular rotator to rotate from the first rotational position to a second rotational position by axial displacement of the medicament delivery member cover towards the retracted position, thereby allowing release of the of plunger rod,
• wherein the guide structure is arranged to allow the tubular rotator to rotate to a third rotational position distinct from the first rotational position by axial displacement of the medicament delivery member cover from the retracted position to the extended position,
• wherein the profiled distal edge periphery is structured so that the sensor arrangement is axially displaced by rotation of the tubular rotator from the second rotational position to the third rotational position, thereby providing an indication of medicament administration, and
• wherein the sensor arrangement is arranged to enable rotation of the rotatable indicator disc by axial displacement of the sensor arrangement such that one of the at least two visually distinct circle sectors displayed in the indicator disc opening corresponds to one of the first rotational position, the second rotational position and the third rotational position of the tubular rotator, and another of the at least two visually distinct circle sectors displayed in the indicator disc opening corresponds to another one of the first rotational position, the second rotational position and the third rotational position of the tubular rotator.

A medicament delivery device comprising:

• a housing having a proximal end and a distal end,
• a medicament delivery member cover received by and rotationally interlocked with the housing, wherein the medicament delivery member cover is axially displaceable between an extended position relative to the housing and a retracted position, wherein the medicament delivery member cover is biased towards the extended position,
• a plunger rod axially biased towards the proximal end of the housing,
• a tubular rotator including a guide structure arranged to convert linear motion of the medicament delivery member cover to rotational motion of the tubular rotator, and a profiled distal edge periphery, wherein the tubular rotator is rotatable relative to the housing, and which tubular rotator is arranged to receive the plunger rod,
• a sensor arrangement axially biased towards the proximal end of the housing, which sensor arrangement abuts the profiled distal edge periphery of the tubular rotator,
• a recording unit attachable to the distal end of the housing, wherein the recording unit includes a first sensor arranged to be actuated by the sensor arrangement by axial displacement of the sensor arrangement, and
• an indicator unit triggered by the actuation of the first sensor and arranged to indicate at least one stage of medicament administration,
• wherein the tubular rotator is initially arranged in a first rotational position in the extended position of the medicament delivery member cover, in which first rotational position the tubular rotator is arranged to prevent axial displacement of the plunger rod,
• wherein the guide structure is arranged to allow the tubular rotator to rotate from the first rotational position to a second rotational position by axial displacement of the medicament delivery member cover towards the retracted position, thereby allowing release of the of plunger rod,
• wherein the guide structure is arranged to allow the tubular rotator to rotate to a third rotational position distinct from the first rotational position by axial displacement of the medicament delivery member cover from the retracted position to the extended position,
• wherein the profiled distal edge periphery is structured so that the sensor arrangement is axially displaced by rotation of the tubular rotator from the second rotational position to the third rotational position, thereby providing an indication of medicament administration, and
• wherein the profiled distal edge periphery has the same elevation level for each of the first rotational position and the third rotational position of the tubular rotator and a distinct elevation level for the second rotational position.