Abstract: A special path generating device includes a base, a first axis slide assembly, a second axis slide assembly, a working portion, a driving portion, a first cam and a second cam. This first axis slide assembly includes a first bar and a first slide. The second axis slide assembly includes a second bar and a second slide. This working portion is mounted on the second slide that has two contacting portions. The driving portion is mounted on the base. When the driving portion drives the driving shaft rotating, the first cam and the second cam rotate accordingly and makes the working portion generating a special path. It can generate a constant-speed circular movement. It is easy to control. In addition, its volume is small.

Abstract: A planetary gear speed reducer includes a gear bracket having a center hole and first, second and third locating portions arranged in parallel along the center hole, a sun gear mounted in the center hole of the gear bracket, first gears rotatably mounted in between the first and second locating portions of the gear bracket and meshed with the sun gear, second gears rotatably mounted in between the second and third locating portions of the gear bracket and meshed with the sun gear, and two annular gears respectively meshed with the first gears and the second gears. Enabling the two annular gears to mesh with the first and second gears respectively avoids installation inconvenience due to phase difference between the first and second gears and eliminates interference during rotation of the two annular gears. By means of changing the number of teeth of each gear, the planetary gear speed reducer can provide a low, medium or high reduction ratio.

Abstract: A folding bicycle with a telescopic rod includes a bicycle body, a folding switch and the telescopic rod. The bicycle body includes front and rear frames that are foldable against each other. The telescopic rod has two ends respectively and pivotally connected to the front and rear frames, and has an engaging position thereof. The folding switch is disposed on a lateral side of the bicycle body to fix the front and rear frames together or release from each other. When the bicycle body is unfolded, the telescopic rod is driven to extend, and the folding switch fixes the front and rear frames together. When the bicycle body is folded in half, the telescopic rod is driven to retract and fixed in the engaging position. Thus, the present invention has advantages of enhanced rigidity of the bicycle body, easily movability, auxiliary positioning, simply rapid folding and lower costs.

Abstract: A circular path generating device comprises a base, a sliding stage, a working portion, and a driving device. The sliding stage is movable on the base along a first axial direction while the working portion is movable on the sliding stage along a second axial direction. The driving device has a driving portion and a crank portion, wherein the driving portion is configured for driving the crank portion to rotate, and the crank portion is connected to the working portion. When the driving portion drives the crank portion to rotate, the working portion is driven by the crank portion to move along a circular path. Thus the circular path generating device according to the present invention advantageously owns a mechanism of one degree of freedom and a simple structure, is capable of performing uniform circular motions, and can be easily controlled.

Abstract: A puzzle with combined interlocking members includes R interlocking members, of which R?7. The interlocking member is composed of two ends and a central portion as well as a first surface and a corresponding second surface. The first and second surfaces are provided with 16 blocks for changing the recessed positions of the central portion. Six interlocking members from R interlocking members can be assembled into at least two configurations or solutions. In addition, this invention provides many other configurations with at least 14 predefined interlocking members of different constructions. So, it presents many flexible configurations with excellent amusement and strong challenge.

Abstract: A special path generating device includes a base, a first axis slide assembly, a second axis slide assembly, a working portion, a driving portion, a first cam and a second cam. This first axis slide assembly includes a first bar and a first slide. The second axis slide assembly includes a second bar and a second slide. This working portion is mounted on the second slide that has two contacting portions. The driving portion is mounted on the base. When the driving portion drives the driving shaft rotating, the first cam and the second cam rotate accordingly and makes the working portion generating a special path. It can generate a constant-speed circular movement. It is easy to control. In addition, its volume is small.