Patent ID: 6425599
Filing Date: 2002-07-30
Classification: B62B

Abstract:
A collapsible trolley, comprising:a main member having a handle; a carrier frame having one end pivotally mounted on said main member so that said carrier frame can be rotated to an extended position substantially perpendicular to said main body, or to a collapsed position substantially parallel to said main member; two wheel assemblies, each of which includes a wheel frame and a wheel mounted pivotally on said wheel frame, wherein said wheel frames are pivotally mounted on said main member such that said two wheel assemblies can be rotated to a use position in which rotational axle of said two wheels is substantially parallel to said main member, or to a collapsed position in which the rotational axle of said two wheels is substantially perpendicular to said main member; and two first gears and two second gears, wherein said two first gears are provided on said carrier frame, said two second gears being respectively provided on said wheel frames of said two wheel assemblies, and respectively engage said two first gears, whereby when said carrier frame is rotated to its extended position, said two wheel assemblies can be driven to rotate to their use position, and when said carrier frame is rotated to its collapsed position, said two wheel assemblies can be driven to rotate to their collapsed position; wherein said tail end of said carrier frame has two cam slots and a pivot groove, wherein said pivot groove corresponds to said pivot seat of said main member, said two cam slots being disposed for mounting of said two first gears, said carrier frame being pivotally mounted on said main member by means of a shaft passing through said pivot hole, said two first gears and said pivot seat of said main member.