Patent ID: 7222550

Claim:
Adjusting device comprising a carriage, at least one guide element, on which the carriage is movably mounted, a shifting device for moving the carriage, a securing mechanism for securing the carriage in a desired position, the shifting device including an electric motor which is integrated into the carriage, the securing mechanism having a securing member adapted to block movements of the carriage when the motor is standing still and to automatically release the carriage and permit it to move when the motor is activated, wherein the securing member comprises a worm gear of a drive transmission, the guide element includes a row of teeth, the worm gear engages the row of teeth, and the securing member includes a clamping element which clamps the worm gear against the row of teeth and comprises a leaf spring which acts on a shaft of the worm gear, and a release device with which the clamping force applied against the worm gear while the motor is activated is automatically released in opposition to the clamping force of the clamping element wherein the release device comprises a guide lever that is rotationally fixed relative to the motor and which guides the position of the worm gear in dependence on the angular position of a housing for the motor.