Patent ID: 7217248

Claim:
A chair comprising a massage device provided in a body-contacting surface, said massage device composed of a frame and a massage roller unit, said massage roller unit having plural rows of massage rollers arranged in said frame; each row of said massage rollers having plural massage rollers respectively bored with a center shaft hole for an independent shaft to extend through to string together said plural massage rollers, each said independent shaft pivotally combined in said frame of said massage device, each said string of said massage rollers forming a rotatable massage surface together with another said string of said massage rollers, each said massage surface formed with two rows of said massage rollers combined on two respective independent shafts, said two rows of the massage rollers combined with first and second pivotal plates located at and spanning across respective first and second ends of said two rows and with a center shaft; said pivotal plates respectively having a center shaft hole for said center shaft to fit pivotally therein, two pivotal holes bored at two sides of said center shaft hole and located lower than said center shaft hole for said respective independent shafts to fit pivotally therein, said center shaft pivotally connected in said frame so that said two rows of the massage rollers may rotate with the said center shaft as a pivot, each massage surface of said two rows of the massage rollers rotatable to produce a massage function against the body of a user when the user rests the body on said massage device and shifts the body.