US Patent 11883968 Cutting length adjustment mechanism, adjustment drive and hair cutting appliance

A cutting length adjustment mechanism for a hair cutting appliance, a hair cutting appliance, a method of operating a cutting length adjustment mechanism for a hair cutting appliance and an adjustment drive for a cutting length adjustment mechanism for a hair cutting appliance wherein the adjustment drive includes an actuator that is configured to actuate a movable portion of the cutting length adjustment mechanism with respect to a housing portion of the hair cutting appliance, and a movement sensor unit that is configured to detect a movement of the hair cutting appliance, the movement involving at least one of an orientation change and a position change. The actuator is further configured to output an adjustment control signal that is derived from the detected movement. In a length adjustment mode, the actuator is operated on the basis of the adjustment control signal.