Abstract: An electronic device holder on a bicycle may include a frame body and a standpipe connection seat, and the frame body is composed of a body, a clamping device, two rotation controls and the nip unit pressing as the combination. The standpipe connection seat is provided with a fine adjustment unit, and the fine adjustment unit, is located on the beam of the glove with the set of risers, and provided to assemble for the anchor of body.

Abstract: A unicycle includes an n-shaped fork and a wheel rotatably mounted between two lower ends of the fork via a drive axle. The drive axle has two opposite ends each having a crank mounted thereon. A pedal mounted on a free end of each crank. A seat post is longitudinally and securely mounted on an upper end of the fork. A seat is attached to a free end of the seat post. A curved sleeve is connected to the seat post and concentrically corresponds with the wheel. A connecting post is telescopically received in the curved sleeve. The connecting post has a free end with two opposite sides each having an L-shaped linkage mounted thereon. Two auxiliary wheels each is rotatably mounted on a free end of each linkage.