Patent ID: 8454086

Claim:
An angle adjuster for a bicycle seat that is configured to be installed between a frame of a bicycle and a seat, the angle adjuster comprising: a frame connector configured to be connected to the frame; a seat connector rotatably connected to the upper end of the frame connector and configured to support the seat; an angle adjusting assembly including a main clutch fixing and releasing the frame connector and the seat connector, and controlling rotational angle of the seat connector with respect to the frame connector by the release operation of the main clutch; an operating lever configured to mount on the frame to operate the main clutch; and a wire connecting the main clutch with the operating lever and operating the main clutch, when the operating lever is operated, wherein the angle adjusting assembly includes: the main clutch including a first adjusting member that has a plurality of first teeth at one side and is fixed to the frame connector and a second adjusting member that has a plurality of second teeth configured to engage with the first teeth of the first adjusting member and is fixed to the seat connector; a clutch control shaft that is fixed to any one of the first adjusting member and the second adjusting member and connected to the wire to engage or disengage the first adjusting member and the second adjusting member, when the operating lever is operated; and a sub-clutch including a third adjusting member that has a plurality of third teeth and is fixed to the seat connector and a fourth adjusting member that has a plurality of fourth teeth configured to engage with the third teeth of the third adjusting member and is fixed to the frame connector, wherein any one of the third adjusting member and the fourth adjusting member of the sub-clutch is fixed to the clutch control shaft, and the third adjusting member and the fourth adjusting member are controlled to be engaged or disengaged by the clutch control shaft.