Bicycle seatpost structure
AssigneeTaiwan Hodaka Industrial Co., Ltd.
InventorBlack Tsai
Life of this patent
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Abstract
A bicycle seatpost structure mainly provided with a shock absorber includes a sealed chamber, a buffer element and a gas. The gas is filled in the sealed chamber to change a gas pressure in the sealed chamber. The buffer element is elastic and installed in the sealed chamber for providing an upward elastic support force to an up tube of the seatpost. When a rider sitting on the saddle presses at the saddle, a shock damping force is produced, and the shock damping force and flexibility may be adjusted by the gas pressure and changed anytime according to the rider's body weight or preference.
Claims8
A bicycle seatpost structure, comprising an outer tube and an up tube disposed at the top of the outer tube;
- a position of an outer wall of the outer tube being fixed to a frame of the bicycle;
- the up tube having a top end, and a locking device installed at the top end for coupling a saddle;
- the up tube having a bottom end extending from a top end of the outer tube into the outer tube;
- the seatpost having a height adjusting device installed therein, and a shock absorber;
- the height adjusting device having a support end extending into the up tube for supporting the up tube indirectly;
- the shock absorber being installed in the up tube and disposed at the top of the height adjusting device, and comprising a sealed chamber, a buffer element and a gas;
- wherein the sealed chamber is disposed in the up tube and formed and separated by a spacer installed at a bottom end, a top cover installed at a top end, and an inner wall of the up tube;
- an outer wall of the spacer being contacted with the inner wall of the up tube, and a bottom end of the spacer being contacted with the support end of the height adjusting device;
- the outer wall of the top cover being fixed to the inner wall of the up tube;
- a gas nozzle communicated from the outside of the sealed chamber into the sealed chamber for filling the gas into the sealed chamber to change a gas pressure of the sealed chamber;
- the buffer element being elastic and installed in the sealed chamber, and having a bottom end contacted with the spacer and a top end contacted with the top cover, and the buffer element providing an upward elastic support force to the up tube.
Dependencies are inferred from the claim text.