Abstract: The disclosure provides a hydraulic switch including a casing, a first cable, a second cable, an electrically conductive piston and a first magnetic conductive component. The casing has a chamber and a liquid channel connected to the chamber. The first cable is disposed through the casing, and the first electrical connection portion of that is located in the chamber. The second cable is disposed through the casing, and a second electrical connection portion of that is located in the chamber. The electrically conductive piston movably is disposed in the chamber. When the electrically conductive piston is in an electrically connected position, the electrically conductive piston is in electrical contact with the first electrical connection portion and the second electrical connection portion. The first magnetic conductive component is configured to provide a magnetic force to move the electrically conductive piston toward an electrically disconnected position.

Abstract: The disclosure provides a bicycle head. The bicycle head includes a head assembly and a control assembly. The head assembly includes a handlebar and a stem. The handlebar is mounted on the stem. The control assembly includes a casing, a first circuit board, an antenna and a battery. The casing is pivotably disposed at a portion where the handlebar is mounted on the stem. The first circuit board, the antenna and the battery are electrically connected to one and another, and at least one of the first circuit board, the antenna and the battery is located in the casing.

Abstract: The disclosure relates to a derailleur assembly including a connecting member, a power module, a linkage member, and a driving module. The power module includes a base body and a battery assembly, wherein the battery assembly is disposed on the base body. The linkage member is pivotably disposed on the base body via a first pivot shaft, and the linkage member is pivotably disposed on the connecting member via a second pivot shaft. The driving module includes a casing and a motor, wherein the casing is pivotably disposed on the base body via a third pivot shaft, the casing is pivotably disposed on the connecting member via a fourth pivot shaft, and the motor is disposed in the casing and is electrically connected to the battery assembly.

Abstract: A derailleur position setting method is adaptable to a bicycle. The method comprises sending an adjustment instruction to a driver by the controller, setting the derailleur to a gear position according to the adjustment instruction by the driver, sending an encoded value corresponding to the gear position to a mobile device by the controller, and sending a position table to the controller according to the encoded value by the mobile device, wherein the position table comprises a plurality of position parameters, each position parameter indicates a designated gear position to which the derailleur is allowable to be set.

Abstract: A bicycle braking and parking device includes a casing, two brake pads, a locking pin, and an electromagnetic driver. The casing has an accommodation space and two pistons located at two opposite sides of the accommodation space. The accommodation space can accommodate part of a brake disk. The brake pads are located at the accommodation space and located between the pistons. The pistons can push the brake pads, and the brake pads can clamp the brake disk. The locking pin is movably disposed on the casing. The electromagnetic driver can force the locking pin to move between a released position and a locked position. when the locking pin is in the released position, the locking pin is separated from the brake disk. When the locking pin is in the locked position, the locking pin is inserted into the brake disk to limit a motion of the brake disk.

Abstract: A bicycle braking and locking mechanism is configured to be mounted on a handlebar. The bicycle braking and locking mechanism includes a brake assembly, a first driving component, and a second driving component. The brake assembly includes a main body, a piston, and a link. The main body is configured to be mounted on the handlebar and has a pressure chamber, the piston is movably located in the pressure chamber, and the link is connected to the piston. The link is configured to be selectively driven by the first driving component or the second driving component so as to move the piston with respect to the pressure chamber.

Abstract: A bicycle hydraulic assembly includes a casing, a first piston, and a second piston. The casing has a hydraulic chamber, an inlet channel, and an outlet channel connected to the hydraulic chamber. The first piston is located in the hydraulic chamber. The second piston is sleeved on the first piston. The second piston has a first end portion and a second end portion opposite to each other. The first end portion is wider than the second end portion located farther away from the inlet channel than the first end portion. When the first piston is moved a distance smaller than a threshold distance, the first piston is moved relative to the second piston while the second piston is stationary relative to the casing. When the first piston is moved a distance greater than the threshold distance, the first piston forces the second piston to move relative to the casing.

Abstract: A shift operating device includes a frame body, a cable spool assembly, a first elastic component, an upshift lever, a driving pawl, a positioning pawl, a movable component, and a downshift lever. The cable spool assembly is disposed on the frame body. The first elastic component can force the cable spool assembly to rotate along a first direction. The upshift lever can rotate the cable spool assembly along a second direction by the driving pawl. The positioning pawl is disposed on the frame body and engaged with the cable spool assembly. The movable component is linearly and movably disposed on the frame body and in contact with the positioning pawl. The downshift lever is disposed on the frame body and in contact with the movable component. When the downshift lever is pivoted, the downshift lever forces the movable component to detach the positioning pawl from the cable spool assembly.

Abstract: A bicycle head is configured to be mounted on a bicycle frame. The bicycle head includes a vertical tube, a stem, a handlebar, a first brake lever, and a shift control box. One end of the stem is mounted on the vertical tube. The handlebar is fixed to another end of the stem. The first brake lever assembly is mounted on the handlebar. The first brake lever assembly includes a main body, a brake assembly, a shift switch, and a battery. The brake assembly and the battery are disposed on the main body, and the shift switch is disposed on the brake assembly. The shift control box is disposed on one of the vertical tube, the stem, and the handlebar and electrically connected to the battery and the shift switch.

Abstract: A bicycle brake lever includes a casing, a hydraulic assembly, and a driving assembly. The hydraulic assembly is disposed in the casing. The hydraulic assembly includes a main body, a piston located in the main body, and a link connected to the piston. The driving assembly includes a pivotable component and a lever. The pivotable component has a mount portion, a first end portion, and a second end portion. The mount portion is connected to the first end portion and the second end portion and pivotably disposed on the main body. The first end portion is pivotably disposed on the link. The lever is pivotably disposed on the main body, and the second end portion is pivotably disposed on the lever. When the lever is pivoted, the lever moves the piston via the pivotable component and the link so as to increase an oil pressure in the main body.

Abstract: The disclosure relates to a derailleur assembly including a base member, a movable member, a driving module and a power module he driving module includes a casing and a motor, wherein the casing is pivotably disposed on the base member via a first pivot shaft, the casing is pivotably disposed on the movable member via a second pivot shaft, and the motor is disposed in the casing. The power module includes a base body and a battery assembly, wherein the base body is pivotably disposed on the base member via a third pivot shaft, the base body is pivotably disposed on the movable member via a fourth pivot shaft, and the battery assembly is disposed on the base body and is electrically connected to the motor.

Abstract: The disclosure provides a bicycle front derailleur including a fixing component, a chain guiding component, a linkage assembly, a battery assembly, two terminals, a circuit board assembly and a driving module. Two opposite ends of the linkage assembly are respectively and pivotally disposed on the fixing component and the chain guiding component. The battery assembly includes a battery holder and a battery. The battery holder is disposed on the fixing component, and the battery holder has a battery slot. One terminal is disposed in the battery slot, and the battery is removably inserted into the battery slot and is electrically connected to the terminal. The circuit board assembly is disposed on the fixing component and electrically connected to the other terminal. The terminals are electrically connected to each other. The driving module is disposed on the fixing component and electrically connected to the circuit board assembly.

Abstract: The disclosure provides a chain guide assembly including a movable member, a chain guide and a resistance applying assembly. The chain guide is pivotably disposed on the movable member. The resistance applying assembly includes a shaft seat, a first engagement component, a control component and a second engagement component. The shaft seat includes a seat portion and a flange portion. The seat portion is fixed on the chain guide. The flange portion is located at a side of the seat portion away from the chain guide and protrudes from the seat portion. The seat portion is disposed through the first engagement component. The first engagement component is clamped by the flange portion and the chain guide. The control component is disposed on the movable member. The second engagement component is pivotably disposed on the movable member and movable with the control component.

Abstract: The disclosure provides a brake and shift control assembly configured to be mounted on a bicycle handlebar. The bicycle handlebar includes two handlebar parts and a middle part connected to and located between the two handlebar parts. The brake and shift control assembly includes a brake module and a shift control module. The brake module is configured to be mounted on one of the handlebar parts. The shift control module includes an assembly seat, a circuit board assembly, a battery, and an antenna. The assembly seat is configured to be disposed on an end of one of the handlebar parts away from the middle part. The circuit board assembly is disposed in the assembly seat, and the battery and the antenna are disposed on the circuit board assembly.

Abstract: The disclosure provides a bicycle rear derailleur including a linkage assembly, a chain guiding assembly, a first assembling component, a first elastic component and a locking mechanism. The linkage assembly is a four-link mechanism and includes a fixed component, a movable component, a first link and a second link. The chain guiding assembly is pivotably connected to the movable component. The first assembling component is pivotably connected to the movable component and disposed between the first assembling component and the chain guiding assembly. The opposite ends of the first elastic component are respectively fixed to the movable component and the first assembling component so as to provide a torque that allows the first assembling component to be pivotable with respect to the movable component.

Abstract: A bicycle braking system includes a lever assembly, a parking brake mechanism, and a positioning assembly. The lever assembly includes a housing and a brake lever pivotably disposed on the housing. The housing has a first positioning structure, and the brake lever has an engagement portion. The parking brake mechanism includes a control handle pivotably disposed on the housing so as to be engaged or disengaged with the engagement portion. The positioning assembly includes a positioning handle pivotably disposed on the control handle and having a locked position and an unlocked position. when the positioning handle is in the locked position, the positioning handle is positioned at the first positioning structure so as to stop the control handle from be pivoted with respect to the housing. When the positioning handle is in the unlocked position, the positioning handle is removed from the first positioning structure.

Abstract: The disclosure provides a wear warning device including a caliper, two brake pads, an elastic component and a first switch. The caliper has two push parts. The two push parts are respectively disposed at a first wall surface and a second wall surface of the caliper. The brake pads are located between the two push parts. The elastic component includes two arm parts and a connection part located between the arm parts. The arm parts are respectively disposed on the brake pads. The first switch is located between the arm parts. When the brake pads are in a worn-out state and the push parts are moved toward each other to force the brake pads to clamp a brake disk and to force the two arm parts to move toward each other, one of the arm parts activates the first switch to produce a wear warning signal.

Abstract: The disclosure provides an anti-lock brake device including an oil pressure tank, a first piston and a second piston. The oil pressure tank has an internal space, an oil inlet and an oil outlet that are connected to one another. The first piston is slidably located in the internal space, and has a first oil channel penetrating a contact portion of the first piston and connected to the oil inlet. The second piston is slidably located in the internal space and includes a push portion, and an outer diameter of the push portion is smaller than that of the contact portion. When the second piston is in a closed position, a chamber having a first unoccupied volume is formed in the internal space. When the second piston is moved from the closed position to a depressurized position, the first volume of the chamber is increased to a second volume.

Abstract: A wireless communication method adapted to an electrical gear-shifting system of bicycle comprises: establishing a first communication connection to an intermediate device by a master controller; establishing a second communication connection to the intermediate device by a slave controller, sending a control signal to the intermediate device through the first communication connection by the master controller, sending the control signal to the slave controller through the second communication connection by the intermediate device, wherein the slave controller controls a motor driver to perform a gear-shifting operation according to the control signal.

Abstract: An authorization pairing method is applicable to an electronic derailleur system for a bicycle, comprising: an authorization device broadcasting a authorization signal, and the first communication device and the second communication device respectively performing the first scanning process and the second scanning process, and each scanning process determine whether the authorization signal is obtained, the first communication device determines whether an identification code is obtained after obtaining the authorization signal, and the second communication device sends an identification code representing the identity after obtaining the authorization signal, and the first communication device obtains the identification code and establishes an authorization pairing with the second communication device.