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

Claim 10:
11. A cutting length adjustment mechanism for a hair cutting appliance, comprising:
a movable portion movable with respect to a housing portion of the hair cutting appliance; and
an adjustment drive comprising:
an actuator configured to have both of a standard mode or a cutting length adjustment mode, wherein in the cutting length adjustment mode, the actuator is configured to actuate said movable portion of the cutting length adjustment mechanism with respect to said housing portion of the hair cutting appliance,
a movement sensor unit configured to:
detect a movement of the hair cutting appliance, said movement of the hair cutting appliance comprising at least one of: an orientation change and a position change:
determine an adjustment control signal based on a rate of change and direction of said detected movement of said hair cutting appliance; and
output said adjustment control signal derived from the detected movement,

wherein in the standard mode involving a cutting action, the actuator is deactivated;
wherein, in the cutting length adjustment mode, the actuator is operated on the basis of the adjustment control signal, and
wherein when the movement sensor detects 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 cutting length adjustment mode, the adjustment control signal causes a length adjustment of the cutting length adjustment mechanism.