| CPC B62B 7/06 (2013.01) [B62B 7/14 (2013.01); B62B 9/20 (2013.01); B62B 2205/20 (2013.01)] | 20 Claims |

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1. A frame structure, comprising:
a hand-gripping part;
a front leg pivotally connected with the hand-gripping part;
a rear leg pivotally connected with the hand-gripping part;
a seat bracket;
a fixing seat slidably disposed on the front leg for connecting the seat bracket to the front leg, wherein the fixing seat is configured to, in response to the rear leg starting to be folded or retracted relative to the front leg, move from a first position of the front leg to a second position of the front leg.
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