Autoinjector having a discharge-release means

An autoinjector, comprising:

• a housing;
• a product container axially fixed in the housing;
• a torsion spring;
• a drive element;
• a propulsion element;
• a needle protection sleeve;
• and
• a locking sleeve,
• wherein, when the autoinjector is pressed against an injection site, the needle protection sleeve carries out an actuation movement in a proximal direction,
• wherein, for discharging liquid from the product container through an injection needle into the injection site, the torsion spring causes the drive element to rotate, wherein rotation of the drive element causes a movement of the propulsion element and of a piston in the product container in a distal direction,
• wherein the autoinjector comprises a coupling, which does not include the propulsion element and which is adapted to release the drive element for rotation as a result of the actuation movement of the needle protection sleeve, and
• wherein the coupling comprises a first coupling element configured to engage via a locking surface with a second coupling element in an engagement,
• wherein prior to the actuation movement, the engagement blocks the rotation of the drive element,
• wherein during the actuation movement, an axial coupling stroke causes the engagement to be released such that one of the first coupling element or the second coupling element rotates relative to the other during the rotation of the drive element, and
• wherein the locking sleeve comprises a locking member for locking the needle protection sleeve in a needle protection position at an end of the injection, wherein the first coupling element is arranged on the locking sleeve.