Patent ID: 7798512

Claim:
A bicycle comprising: a frame extending longitudinally; a front wheel for steering at a front of the frame; a rear wheel at a rear of the frame; and an auxiliary means disposed at the rear of the frame and including first and second auxiliary support devices at one side and the other side, respectively, of the rear wheel, the first and second auxiliary support devices each including an auxiliary wheel for assisting movement of the bicycle on each side of the rear wheel, wherein: each of the first and second auxiliary support devices includes: an arm having one end that is pivoted to the frame and having another end that moves vertically as a free end; the auxiliary wheel being pivoted to the free end side of the arm, and being apart from and in parallel with the rear wheel, a biasing means for biasing the arm in a direction of lowering the auxiliary wheel; and an arm lock means for locking the rotation of the arm; the pair of arms rotate independently of each other; and the arm lock means restrict the rotation of the arms thereby locking the vertical movement of the auxiliary wheels, wherein each of the biasing means includes a spring means having a spring attached to the frame, the spring pressing the arm downward, and the spring means includes an adjusting means for adjusting the pressing force of the spring.