Brush head with motor driven flexible bristles forming circle - has brush roller, contact sensor and emergency off switch

摘要

The at least one contact sensor (86, 88) is recessed inside the ring of bristles (66) and turns with the brush roller (46). The contact sensor has a threshold limit switch adjustable to a radial operating force, for releasing an emergency off signal. The sensor bristle holder is in the form of a lever with restricted movement, and extending over part of the brush roller's (58) periphery. The holder rotates on an axle parallel to the pivot axle of the brush roller against the adjustable force of a counter holding spring. ADVANTAGE - The brush head activates an emergency off switch for critical situations to avoid damaging the surface being cleaned.