Electromechanical installation device for inserting into a closed cylinder-type closing device

An electromechanical installation device for insertion into a locking cylinder locking device, wherein the locking device is designed as a locking cylinder, as a knob cylinder, as a furniture cylinder or as a padlock, or into a switching element,

• with a stator for insertion into a locking device housing or into a switching element housing,
• and with a rotor as components
• and with a locking element,
• wherein the rotor is mounted in the stator,
• wherein the locking element is mounted in one of the components,
• wherein the locking element can be moved between a first position and a second position,
• wherein the locking element in the first position connects the rotor and the stator and blocks a rotation of the rotor in the stator,
• wherein the locking element in the second position allows a rotation of the rotor in the stator,
• wherein the installation device comprises an electromechanical actuator, wherein the actuator is used to enable the locking element to be movable into the second position, wherein the rotor houses the electromechanical actuator and
• wherein the installation device comprises a key channel for inserting a key, wherein the installation device comprises an extension element, wherein the extension element is designed to move in a first direction, axially to a rotor axis of the rotor, when a key is inserted, and to move in a second direction counter to the first direction axially to a rotor axis when the key is removed.