Patent ID: 7097183
Filing Date: 2006-08-29
Classification: B62B

Abstract:
1. A trolley structure comprising a main frame, wheel bases, retainers, a stand, and a handlebar, the main frame comprising a pair of rods at its bottom and a pair of retractable holders at its top; each wheel base inserted onto the respective rod of the main frame comprising a wheel and an opening; each retainer secured to the respective rod of the main frame being provided with an opening; the stand pivotally connected to the retainers being provided respectively on two sides a first pivoting holder; the handlebar inserted into the retractable holders of the main frame being pivoted with an extension connector and another end of the extension connector being pivoted to the stand; each wheel base comprising a plurality of troughs at a bottom; each rod of the main frame comprising a first through hole; another first through hole being relatively provided on each retainer; the through holes of each rod and each retainer receiving insertion of a first pivoting member; the first pivoting member being pivotally connected with a driven gear at an outer edge of a retainer; the driven gear having a plurality of axially extending teeth formed at one portion thereof and a plurality of radially protruding checking members formed at another portion thereof to be held in the troughs of the wheel base; each first pivoting holder of the stand comprising an active gear; and the active gear meshing with the driven gear to drive the driven gear to turn; the active and driven gears being pivotally displaceable about substantially parallel axes.