A position adjusting device, which adjusts the position of a seat in a height direction, includes a seat support plate that supports the seat and a rotary link that rotates integrally with the seat support plate when the position of the seat is adjusted. The seat support plate includes a front portion that is positioned directly under an occupant's buttocks when the occupant is seated in the seat, and a rear portion that is positioned on the rear side of the front portion. The rotary link includes a front link and a rear link that are provided at positions different from each other in a front to back direction. The front link and the rear link are mounted on the front portion, and the width of the front portion is smaller than the width of the rear portion.

The present invention relates to an adjustable height or dropper seatpost for a bicycle.

A bicycle suspension seatpost with a four-bar linkage design and a suspension spring element located within the seatpost tube is provided. The bicycle seatpost comprises a seatpost tube configured to be secured to a bicycle frame, a pair of substantially vertically stacked linkage bars rotatably connected to the seatpost tube, a rear linkage rotatably connected to the pair of substantially vertically stacked linkage bars, and a biasing member disposed within the protrusion to resist rotation of the pair of substantially vertically stacked linkage bars about one or more axes of rotation.

A bicycle seat suspension can include one or more movable body members. The one or more movable body members can be configured to be operatively connected to a bicycle saddle. The one or more movable body members can be configured to change configuration when a load is applied to the bicycle saddle. The bicycle seat suspension can also include a vibration isolator. The vibration isolator can be configured to exhibit a non-linear stiffness profile including a region of quasi-zero stiffness. The vibration isolator can be operatively positioned such that, when the one or more movable body members change configuration responsive to a load being applied to the bicycle saddle, the one or more movable body members can engage the vibration isolator. As a result, the vibration isolator can isolate a person seated on the bicycle saddle from vibrations transferred through the bicycle saddle.

A position adjusting device, which adjusts the position of a seat in a height direction, includes a seat support plate that supports the seat and a rotary link that rotates integrally with the seat support plate when the position of the seat is adjusted. The seat support plate includes a front portion that is positioned directly under an occupant's buttocks when the occupant is seated in the seat, and a rear portion that is positioned on the rear side of the front portion. The rotary link includes a front link and a rear link that are provided at positions different from each other in a front to back direction. The front link and the rear link are mounted on the front portion, and the width of the front portion is smaller than the width of the rear portion.

A bicycle seat position changer is provided which allows the rider to quickly change the effective seat tube angle of the bicycle without requiring the use of tools. The seat position changer allows the rider to move the seat between a forward position and a rearward position, allowing a rider to select a more aerodynamic position or a traditional road position while riding, as required for comfort or by riding conditions. The seat position changer allows the rider to adjust the seat position between the forward and rearward positions while maintaining a consistent difference in seat-to-bottom-bracket length. In one embodiment the consistent difference in seat-to-bottom-bracket length is close to zero and imperceptible to the rider.

A bicycle suspension seatpost with a four-bar linkage design and a suspension spring element located within the seatpost tube is provided. The bicycle seatpost comprises a seatpost tube configured to be secured to a bicycle frame, a pair of substantially vertically stacked linkage bars rotatably connected to the seatpost tube, a rear linkage rotatably connected to the pair of substantially vertically stacked linkage bars, and a biasing member disposed within the protrusion to resist rotation of the pair of substantially vertically stacked linkage bars about one or more axes of rotation.

A device, system, or method for changing the center of gravity of a bicycle, in particular an electric bicycle, to suit the situation, with: an actuator for changing the center of gravity of the bicycle, at least one sensor that monitors the riding status of the bicycle, a control unit which receives and processes data from the sensor, determines a center of gravity of the bicycle adapted to the situation and outputs corresponding control signals to the actuator in order to carry out the change in center of gravity. According to the invention, an adjustment speed of the change in the center of gravity can be adapted to a riding state of the bicycle.

A suspension seatpost includes a linkage assembly and an elastic component. The linkage assembly defines a space, and the elastic component can be placed in the space. The elastic component has at least two different elastic coefficients, and the elastic component can be aligned to multiple interlocking parts of the linkage assembly in multiple different modes and placed in the space.

A bicycle seat suspension can include one or more movable body members. The one or more movable body members can be configured to be operatively connected to a bicycle saddle. The one or more movable body members can be configured to change configuration when a load is applied to the bicycle saddle. The bicycle seat suspension can also include a vibration isolator. The vibration isolator can be configured to exhibit a non-linear stiffness profile including a region of quasi-zero stiffness. The vibration isolator can be operatively positioned such that, when the one or more movable body members change configuration responsive to a load being applied to the bicycle saddle, the one or more movable body members can engage the vibration isolator. As a result, the vibration isolator can isolate a person seated on the bicycle saddle from vibrations transferred through the bicycle saddle.