Patent ID: 8066162

Claim:
A modulator for supporting arms of a rear bicycle carrier comprising: a support frame including a central post having two sides with which first and second supporting arms are axially connected; an adjusting device for controlling the first and second supporting arms to pivotally rotate relative to the central post including: a ratchet holder integrally formed with or separately disposed on a axial connecting position of the central post and including a plurality of inner teeth arranged around the internal periphery thereof; a connecting shaft horizontally inserted through the ratchet holder, and on two sides of an intermediate seat of the connecting shaft being mounted two ratchet members respectively for engaging with the inner teeth of the ratchet holder; and a control unit fixed on a predetermined position of the rear bicycle carrier for being rotated clockwise or counterclockwise to disengage at least one of the two ratchet member from the inner teeth of the ratchet holder, such that the first and second supporting arms being allowed to be adjusted freely toward a suitable angle relative to the central post.