Patent ID: 8876779

Claim:
An auto injector with a housing for accommodation of a syringe with a needle, the syringe being movably positioned in the housing between a first position in which position the needle is accommodated inside the housing and a second position in which position the needle protrudes outside the housing, a mechanical driver anchored to the housing at a first anchor location for applying a first force to the syringe thereby moving the syringe from the first position to the second position, characterized in that the mechanical driver is also configured for applying a second force to the syringe by anchoring the mechanical driver to a different second anchor location, and that the auto injector further comprises a first arm configured for conveying the first force from the mechanical driver to the syringe for moving the syringe from the first position to the second position, and a second arm configured for conveying the second force from the mechanical driver to a syringe shoulder for retracting the syringe from the second position to the retracted position, and wherein the mechanical driver has one end applying the first force to the first arm and another end applying the second force to the second arm, and wherein the second arm is kept in a fixed position during movement of the syringe from the first position to the second position, and wherein the first arm is kept in a fixed position during movement of the syringe from the second position to the retracted position.