Arrangement for a drug delivery device and drug delivery device

An arrangement for a drug delivery device, the arrangement comprising:

• a housing element,
• a plunger rod that is axially movable with respect to the housing element,
• a feedback element that is axially movable with respect to the housing element and with respect to the plunger rod;
• a feedback energy member configured to provide energy to induce a movement of the feedback element relative to the plunger rod in a first axial direction;
• a radially displaceable stop feature and an impact feature, wherein the arrangement has an initial state in which:
• the plunger rod is in a proximal position,
• the feedback element is arranged in a cavity of the plunger rod, and
• the feedback element is limited in its movement relative to plunger rod in the first axial direction by the stop feature being in a first radial position, and
• wherein the arrangement is configured to be switched from the initial state into a released state in which:
• the plunger rod is moved in a distal direction at least until the plunger rod reaches a feedback position,
• the movement of the plunger rod into the feedback position results in the stop feature being radially displaced to enable a movement of the feedback element relative to the plunger rod in the first axial direction beyond the stop feature, and
• the feedback element moves relative to the plunger rod in the first axial direction and beyond the stop feature due to the energy provided by the feedback energy member until the feedback element hits against the impact feature, thereby producing one or both of a tactile feedback and an audible feedback,
• wherein the stop feature is axially and/or rotationally fixed to the plunger rod.

A drug delivery device comprising:

• an arrangement comprising:
• a housing element;
• a plunger rod that is axially movable with respect to the housing element;
• a feedback element that is axially movable with respect to the housing element and with respect to the plunger rod;
• a feedback energy member configured to provide energy to induce a movement of the feedback element relative to the plunger rod in a first axial direction;
• a radially displaceable stop feature and an impact feature, wherein the arrangement has an initial state in which:
• the plunger rod is in a proximal position,
• the feedback element is arranged in a cavity of the plunger rod, and
• the feedback element is limited in its movement relative to plunger rod in the first axial direction by the stop feature being in a first radial position, and
• wherein the arrangement is configured to be switched from the initial state into a released state, in which:
• the plunger rod is moved in a distal direction at least until the plunger rod reaches a feedback position,
• a movement of the plunger rod into the feedback position results in the stop feature being radially displaced to enable a movement of the feedback element relative to the plunger rod in the first axial direction beyond the stop feature, and
• the feedback element moves relative to the plunger rod in the first axial direction and beyond the stop feature due to the energy provided by the feedback energy member until the feedback element hits against the impact feature, thereby producing one or both of a tactile feedback and an audible feedback;
• a housing with the housing element fixed to or integrated in the housing;
• a medicament container with a needle;
• and
• a needle shroud telescopically coupled to the housing and axially movable with respect to the housing between an extended position in which the needle is covered by the needle shroud, and a retracted position in which the needle is exposed, wherein the drug delivery device is configured to be switched from the initial state into the released state by moving the needle shroud from the extended position into the retracted position.