Folding bicycle structure
AssigneeArthur Chu
InventorKuo Yi Chu
Life of this patent
Estimating the term…
Abstract
A folding bicycle comprises a retractable front tube set. Handles at two sides of the top of the front tube set can be folded to the same side. An eccentric rotation device is pivotally provided at the top of the front tube set to drive an internal tube to retract in an outer tube for positioning. A seat tube is pivotally connected with the front tube set. A saddle is provided at the top of the seat tube. A rear tube is pivotally connected with the seat tube. A fastening device is provided between the rear tube and the seat tube to fix the seat tube. The front tube set, the seat tube and the rear tube are connected together by a joint link, which provides the function of a joint to let the front tube set, the seat tube and the rear tube unfold or fold with one another.
Claims7
An improved folding bicycle structure comprising:
- a retractable front tube set including an outer tube having an inner tube therein, an action rod having a top and a bottom being provided in said inner tube;
- a first handle being provided on a first side of said top of said action rod, and a second handle being provided at a second opposing side of said top of said action rod;
- an eccentric rotation device being pivotally coupled and releasably engagable with said top of said action rod;
- a coned piece being coupled adjacent at said bottom of said action rod, said action rod displaces said coned piece into said inner tube to expand said inner tube in said outer tube for fixing a position thereof responsive to rotation of said eccentric rotation device;
- a seat tube having a distal end pivotally connected to said front tube set, said seat tube being provided with a saddle at a top end of said seat tube;
- a rear tube having a top end pivotally connected to said seat tube;
- a fastening device being provided between said rear tube and said seat tube, said fastening device fixing said seat tube when said rear tube pivotally rotates with respect to said seat tube to unfold;
- and
- a joint link connected between said front tube set, said seat tube and said rear tube for displaceably interconnecting said front tube set, said seat tube and said rear tube to unfold and fold with respect to one another.
An improved folding bicycle structure comprising:
- a retractable front tube set including an outer tube having an inner tube therein, an action rod having a top and a bottom being provided in said inner tube;
- a first handle being provided on a first side of said top of said action rod, and a second handle being provided at a second opposing side of said top of said action rod;
- an eccentric rotation device being pivotally coupled and releasably engagable with said top of said action rod, said action rod being releaseably engaged with said inner tube to expand said inner tube in said outer tube for fixing a position thereof responsive to rotation of said eccentric rotation device;
- a seat tube having a distal end pivotally connected to said front tube set, said seat tube being provided with a saddle at a top end of said seat tube;
- a rear tube having a top end pivotally connected to said seat tube;
- a fastening device being provided between said rear tube and said seat tube, said fastening device fixing said seat tube when said rear tube pivotally rotates with respect to said seat tube to unfold, wherein said fastening device including:
- a support arc piece connected with said rear tube;
- a U-shaped piece connected with said support arc piece, two projective points being provided at inner sides of two clamping arms of said U-shaped piece;
- and
- a U-shaped clamping body whose opening opposes an opening of said U-shaped piece and is pivotally connected therewith, two clamping arms of said U-shaped clamping body being inside said two clamping arms of said U-shaped piece, said U-shaped clamping body being clamped outside said seat tube, said rear tube being used to drive said U-shaped piece to pivotally turn and let said support arc piece support said seat tube and said two projective points compress said U-shaped clamping body so as to drive said two clamping arms of said U-shaped clamping body to contract inwards and clamp said seat tube when said rear tube pivotally turns with respect to said seat tube, thereby fixing said seat tube;
- and
- a joint link connected between said front tube set, said seat tube and said rear tube for displaceably interconnecting said front tube set, said seat tube and said rear tube to unfold and fold with respect to one another.
Dependencies are inferred from the claim text.