Abstract: The disclosure provides a limit device and a robot using the same. The limit device comprises a first connecting member, a transmission rod and a second connecting member. The first connecting member comprising a first main body portion and two first connecting elements. The two first connecting elements are arranged at intervals. The two first connecting elements are respectively connected to the first main body. The transmission rod comprising a first end and a second end. The first end and the second end are arranged at intervals. The first end penetrates through one of the two first connecting elements. The second end penetrates through the other one of the two first connecting element. The second connecting member provided with two indexing buckles. The two indexing buckles are arranged at intervals, each of the indexing buckles comprises a first limiting groove and a second limiting groove.

Abstract: A low drag bike seat stem comprised of a joint and a briolette shaped tube; an insertion cap being built in the seat tube; the height of the tube being adjustable and secured in the seat tube; the joint being connected to the upper end of the briolette shaped tube; and a clamping hole in shape related to that of the briolette shaped tube being provided in the center of the insertion cap for the tube to be fully inserted through the insertion cap.

Abstract: A low drag bike seat stem comprised of a joint and a briolette shaped tube; an insertion cap being built in the seat tube; the height of the tube being adjustable and secured in the seat tube; the joint being connected to the upper end of the briolette shaped tube; and a clamping hole in shape related to that of the briolette shaped tube being provided in the center of the insertion cap for the tube to be fully inserted through the insertion cap.

Abstract: A bike stem clamp. The clamp is adapted to a stem connected to a handle of the bike. The clamp includes one or more fingers extending from its surface that are interlocked with a fixation plate adapted at an angle and adjustable with a clip accommodating a water bottle, speedometer, trip odometer, lighting fixture or any other object with a selected purpose and adapted to the bike.

Abstract: A bicycle water bottle clip assembly. The assembly includes a front grip and a water bottle clip with a fixing device formed by two insertion holes before the front grip is fastened to the stem of the handle of the bicycle. Two insertion sections extend from the water bottle clip to connect the grip and the clip to receive the water bottle provided with a straw at the front end of the stem of the bicycle so that the rider may drink the water as desired, simply by slightly bending forwards without having to remove either of his hands from the handle, thus improving riding safety.

Abstract: A bicycle water bottle clip assembly comprised of a front grip and a water bottle clip with a fixing means formed by two insertion holes before the front grip fastened to the stem of the handle of the bicycle and two insertion sections extending from the water bottle clip to connect the grip and the clip for receiving the water bottle provided with a straw at the front end of the stem of the bicycle so that the rider may drink the water as desired simply by slightly bending forward without having to leave either of his hands from the handle for riding safety.

Abstract: The handlebar stem and handlebar of a bicycle are secured together by a common joint having a joint seat defining a joint hole and an extension part having a half-cylindrical groove which is engageable by a cover having a corresponding half-cylindrical groove and a plurality of elliptical-shaped fastener holes. An open slot extends from the joint hole through the extension part for permitting the handlebar stem to be inserted through the joint hole and secured therein by a pair of fasteners. Similarly, the handlebar is disposed between the half-cylindrical grooves and secured in place by fasteners extending through the elliptical holes and the extension part.

Abstract: A bicycle saddle adjustment structure based primarily on holding the seat post into position by a pair of H-shaped lower and upper clamps with a pair of flanges on their two sides. The lower clamp has a curved bottom engaging a curved slot of the base which is installed above the seat post. A pair of keys on two sides of the lower clamp interlock with respective recesses two sides of the curved slot of the base. A pair of bolts are threaded through a hole and an open slot of the front and rear parts of the base and into threaded holes of the upper clamp.