Patent ID: 7756448

Claim:
A traction-drive type driving-force transmission mechanism comprising: a sun roller having a first central axis, said sun roller being rotatable about said first central axis; a plurality of shaft members each having a second central axis, each of said shaft members being disposed on an adjacent axis inclined relative to said first central axis by a given angle, in such a manner that said second central axis is aligned with said adjacent axis; a plurality of planetary rollers disposed along an outer peripheral surface of said sun roller while being supported by respective ones of said shaft members; a carrier which holds each of said shaft members in said inclined posture, said carrier being adapted to be rotated about said first central axis together with said planetary rollers; and a pressing member adapted to pressingly move each of said planetary rollers in a direction for reducing a distance with respect to said first central axis when viewed on said adjacent axis, so as to press each of said planetary rollers against said outer peripheral surface of said sun roller to allow a driving force to be transmitted through means of a traction force between said sun roller and each of said planetary rollers.