Patent ID: 7631577

Claim:
A bicycle treadle device comprising: a treadle having an axial hole at a center portion thereof; at least one control block disposed in one end of the treadle near a locking sheet; the at least one control block having a main ring formed thereof; the at least one control block having a first protrusion and a second protrusion protruded from the main ring; a distance from the second protrusion to a center of the main ring being greater than a distance from the first protrusion to the center of the main ring; and the locking sheet including a front locking sheet and a rear locking sheet for clamping a toe positioning unit; each of the front locking sheet and rear locking sheet having an approximate U shape; two distal ends of the front locking sheet respectively having a through hole; two distal ends of the rear locking sheet respectively having a through hole; the two distal ends of the front locking sheet received in the rear locking sheet so that each through hole in the front locking sheet is aligned to each through hole in the rear locking sheet; a screw rod passing through the through holes of the front locking sheet and the rear locking sheet so as to lock the front locking sheet to the rear locking sheet; the screw rod passing through the treadle so that the front locking sheet and rear locking sheet are pivotally rotated relative to the screw rod; wherein by rotating the at least one control block, one of the main ring, the first protrusion and the second protrusion selectively abuts against the front locking sheet of the locking sheet such that an expansion of the front locking sheet is determined.