Patent ID: 11883968
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. A method of operating a cutting length adjustment mechanism for a hair cutting appliance, the method comprising acts of:
providing an adjustment drive comprising an actuator for actuating a movable portion of the cutting length adjustment mechanism,
providing a movement sensor configured to detect a movement of the hair cutting appliance, involving at least one of an orientation change and a position change,
providing both of a standard mode, wherein a movement of the hair cutting appliance occurs while cutting hair without producing a corresponding change in a cutting length of the hair cutting appliance, or a cutting length adjustment mode, wherein the movement of the hair cutting appliance is provided for producing the corresponding change in the cutting length, wherein during the cutting length adjustment mode, the method comprising acts of:
detecting a movement of the hair cutting appliance;
determining an adjustment control signal based on at least one of a rate of change and a direction of said detected movement of said hair cutting appliance;
operating the actuator to change the cutting length of the hair cutting appliance based on the adjustment control signal,

wherein when the movement of the hair cutting appliance is at least one of a forward rotation of the hair cutting appliance; a rearward rotation of the hair cutting appliance; a speed of rotation of the hair cutting appliance; and a rotation angle of the hair cutting appliance, and the actuator is operating in the length adjustment mode, the adjustment control signal causing a length adjustment of the cutting length adjustment mechanism.