1. We have independently designed a chain tension adjustment device for the rear derailleur of bicycles, including a base, rotating shaft, tension transmission component, radial pressure control component, gear type pressure adjustment component, pressure conversion component, and unidirectional rotating component. Through this new device, the chain guide component can swing within a certain range and adjust the appropriate tension. When the adjustment force of the adjustment device is balanced with the tension of the chain, the chain guide component is relatively fixed in one position to avoid being affected by vibration and swinging. This ensures that the adjusted tension remains fixed and does not swing counterclockwise, avoiding chain detachment, improving cycling experience, and providing cycling safety.

2. Design a bicycle rear derailleur with adaptive dampers, including fixed parts, motion components, damping mechanism, and chain guide device. The bicycle with the adaptive damper is equipped with a rear wheel, which, through the mutual cooperation of the sleeve, transmission component, and gear component, enables the movement of the transmission component and gear component to have variability, and can make corresponding movements according to the motion of the bicycle. During the movement process, the energy consumed by the gear rotation is proportional to the speed of the gear, and the kinetic energy generated by the forward rotation of the guide chain device due to the continuous bumpy road surface driving of the bicycle is consumed, The guide chain device will not rotate forward due to the consumption of kinetic energy, achieving adjustment of chain tension, thereby avoiding the problem of chain loosening or even falling off; By driving each other through gears, a large amount of forward kinetic energy generated by the continuous bumpy road surface is dissipated through two attenuations, avoiding the problem of chain loosening or even detachment caused by the forward rotation of the guide chain device, thereby maintaining the chain in a tensioned state on the continuous bumpy road surface.

3. We have independently designed a wireless electronic gear shifting system, which connects the manual and front and rear chain shifter motors through the ANT+ultra low power transmission protocol to achieve gear shifting effect. The maximum control distance can reach 100 meters. The unique ultra-low power transmission protocol extends the normal working time of a single button battery by hand to one month.