Medicament delivery device

A medicament delivery device, comprising:

• an elongated housing extending along an axis for containing a medicament;
• a coaxially extending plunger rod mounted in the housing so as to be axially displaceable for expelling successive doses of medicament and rotatable about the axis;
• wherein the plunger rod and housing respectively comprise first and second guides in mutual engagement that are configured to guide the plunger rod in the housing successively from a ready-to-use position, in which the plunger rod is axially displaceable for expelling a dose of medicament, to a non-ready-to use position, in which the plunger rod is axially blocked, the non-ready-to use position being axially spaced from the ready-to-use position, and from the non-ready-to use position to a subsequent ready-to-use position angularly spaced from the non-ready-to use position about the axis;
• wherein the second guide is integral with the housing;
• an indicator member displaceably mounted on the housing between a first angular position indicative of the ready-to-use positions and a second angular position indicative of the non-ready-to use position and subsequent ready-to-use position, the indicator member and plunger rod respectively comprising third and fourth guides in direct mutual engagement, whereby the position of the indicator member is linked to the position of the plunger rod;
• wherein the first and fourth guides include alternating axial sections and circumferential sections extending in radial planes.