A control unit for height adjustment of a bicycle seat post mainly includes a body, a controlling arm, and a pivot pin connecting the body and the controlling arm. Besides, a controlling wire is used to control a height adjustment device of the bicycle seat post to work or stop. The control unit of the present invention requires fewer assemblies and it is easy to be assembled.

A bicycle saddle raising device includes a fixed tube carrying a slidable rising rod, stroke springs biasing the rising rod upward, a locking mechanism for locking the rising rod at a predetermined height, and a locking/unlocking switching arrangement. The locking mechanism includes an engaging member having a plurality of engaging recesses, and claw members having claws which engage the engaging member. The locking/unlocking switching arrangement disengages the claws from the engaging recesses. A claw state switching member presses the claws in a direction in which they engage the engaging recesses.

A telescopic, height adjustable, bicycle seatpost with a fixed frame insertion length, but adjustable uncompressed resting height is described herein. This telescopic bicycle seatpost with adjustable height and fixed frame insertion provides a unique structure and method for setting the uncompressed resting height of a telescopic bicycle seatpost, while using a fixed insertion length into the bicycle frame. The assembly allows a single telescopic bicycle seatpost to fit on many different sizes of bicycle, for cyclists of varied height and leg length, while maximizing the telescoping length of the seatpost for each situation, without requiring various lengths of seatpost to be manufactured. Instead, the telescoping length of the seatpost may be adjusted for cyclists of different height, allowing for one seatpost to fit many size frames and cyclists, while allowing each individual to maximize the telescoping length for their particular setup.

A bicycle seatpost assembly comprises a first tube, a second tube, and a positioning structure to relatively position the first tube and the second tube. The positioning structure is mounted to at least one of the first tube and the second tube and is configured to change a state of the bicycle seatpost assembly among a first adjustable state in which the second tube is retracted or extended relative to the first tube at a first speed in response to a reference force applied to the second tube, and a second adjustable state in which the second tube is retracted or extended relative to the first tube at a second speed in response to the reference force applied to the second tube. The second speed is lower than the first speed.

A seat post adjustment device includes an outer tube and an inner tube which has the first end thereof inserted into the outer tube, and a seat is connected to the second end of the inner tube. An adjustment unit is connected to the inner tube, the adjustment unit and the inner tube are linearly movable for a travel distance in the outer tube. An end member is connected to the lower end of the outer tube. A restriction unit is located in the outer tube and has a restriction member which has a length and can be cut when needed such that the travel distance of the inner tube in the outer tube is restricted when the adjustment unit contacts the restriction member.

When the adjustment unit contacts the restriction member, the minimum height of the second end of the post beyond the outer tube is set.

A bicycle seat adjustment device includes an adjustment device connected to the second end of the inner tube and a first clamp member is fixed to the second end. An adjustment rod movably extends through the first clamp member to define an adjustment distance formed between the first and second clamp members. An expansion member and a resilient member are mounted to the adjustment rod. The expansion member is located in the adjustment distance. The first and second clamp members respectively contact two ends of the expansion member so that the expansion member having its edge contacting the inner periphery of the outer tube. A control device is connected to the clamp unit and has a lever. The control rod is connected between the lever and the adjustment rod. The control rod is pushed by the lever to drive the adjustment rod to move linearly into the inner tube.

A bicycle seat adjustment device includes a seat tube and a seat post inserted in the seat tube. A base is connected to the top of the seat post. A control unit has an adjustment device located between the seat tube and the seat post to control movement of the seat post. A pivotal unit has a pivotal member, a link and a collar. The pivotal member is pivotally connected between the base and the link. The collar is mounted to the seat post and pivotally connected to the link. A connection unit is pivotably connected to the pivotal member and connected with a seat. When adjusting the seat, the seat is able to be pivoted by cooperation from the pivotal unit simultaneously.

A telescopic saddle support for supporting a bicycle saddle includes a support unit to be secured on or in the frame of a bicycle; a telescoping unit to be moved in a guided manner relative to the support unit within a specified telescoping range, the telescoping range extending from a minimum length of the saddle support to a maximum length of the saddle support; and a coupling device arranged between the telescoping unit and the support unit. A coupling device part which is paired with the support unit is connected to the support unit in a fixed manner, and the telescoping unit can be coupled to the support unit via the coupling device. A blocking device releasably blocks the guided telescoping movement of the telescoping unit relative to the support unit. The coupling device has an adjustment mechanism via which the maximum length of the saddle support can be adjusted, an axial force which acts on the telescoping unit being transmitted to the support unit via the coupling device.

The device is used to allow any bicycle to have seat height adjustment controlled by the rider while the bicycle is in motion. Seat height is adjustable to suit the needs of the operator. The device will provide up to 6 inches of adjustment range. The lower portion of the device has 2 rails sized and space the same as on all bicycle seats. This allows the unit to be mounted to any style, size and type of seat-post/seat-clamp combination manufactured since 1960. The upper portion of the unit is designed to accept any bicycle seat manufactured today or past 50 years. A control cable exits from the bottom of the lower portion of the unit, runs along the bicycle frame up to a small control lever installed nearby the handlebar grips. This allows easy seat height adjustment while riding without having to remove hands from the handlebar. Activating the lever while body weight is lifted from the seat unlocks the seat and allows it to rise to the level desired. Once the desired seat height is achieved the lever is released, body weight added, locking the seat in the desired position. If desired, the owner may set a memory position so that the next time the seat is raised it automatically stops at this height. To lower the seat the operator removes their weight from the seat, activates the lever unlocking the seat and the while lever remains depressed adds body weight to lower the seat to the desired position. The existing seat clamp may be used to adjust the tilt of the seat or to adjust the seat post height when required to provide the best results from the device.

A pneumatic-hydraulic type control valve includes a cable attached to a fixed base, a valve base disposed in the fixed base, and a valve stem disposed in the valve base and driven by the cable to be opened. First and second oil guiding holes of the valve base communicate with each other when the valve stem is opened, and the first and second oil guiding holes of the valve base do not communicate with each other when the valve stem is closed. Further, the valve stem has a first stressed portion for bearing a fluid closing force and a second stressed portion for bearing a fluid opening force. The outer diameter of the first stressed portion is larger than that of the second stressed portion. Thus, the present invention achieves effects of simplifying structure and accurate actuation without affecting the sealing effect.