Patent ID: 8382149
Filing Date: 2013-02-26
Classification: B62B,B62K

Abstract:
1. A baby trailer frame mounting structure, comprising: a bottom frame unit comprising a front bar, a rear bar, two opposing sidebars connected in parallel between said front bar and said rear bar, two sub-sidebars respectively connected between said sidebars and said front bar, two rear wheel holders respectively affixed to said sidebars near said rear bar and adapted to pivotally support one respective rear wheel, a trailer bar holder affixed to one said sidebar near said front bar for the mounting of a trailer bar; a top frame unit having opposing front and rear ends of opposing left and right sides thereof respectively coupled to front and rear ends of said sidebars of said bottom frame unit; a trailer bar having a rear end thereof pivotally connected to said trailer bar holder of said bottom frame unit and a front end thereof connectable to a rear part of a frame structure of a bicycle; two front wheel holder mounting frame assemblies respectively and selectively connected to said sidebars or said front bar of said bottom frame unit for the connection of one respective front wheel holder; and two front wheel holders each comprising a coupling axle respectively pivotally coupled to said front wheel holder mounting frame assemblies and pivotally supporting one respective front wheel, said coupling axle having a neck near a top end thereof; wherein: said front wheel holder mounting frame assemblies each comprises: a base frame block, said base frame block comprising a locating groove located on each of two opposite lateral sides thereof, a locating hole disposed at one lateral side thereof and extending across one said locating groove and respectively fastened to said sidebars of said bottom frame unit by a respective fastening member, an accommodation open chamber extending to a rear side thereof, a top through hole and a top coupling hole respectively located on a top side thereof in communication with said accommodation open chamber, a bottom through hole and a bottom coupling hole respectively located on a bottom side thereof in communication with said accommodation open chamber, and a locating notch located on the top side and extending to the rear side, the locating grooves of the base frame block of one said front wheel holder mounting frame assembly being respectively attached to one said sidebar of said bottom frame unit the associating sub-sidebar, the locating grooves of the base frame block of the other said front wheel holder mounting frame assembly being respectively attached to said trailer bar holder of said bottom frame unit and the associating sub-sidebar; at least one spring member; and a control member inserted into said accommodation open chamber of said base frame block and pivotally connected to said base frame block for locking the coupling axle of one said front wheel holder to said base frame block, said control member comprising a rear stop block suspending in said locating notch, at least one support rod disposed adjacent to said rear stop block and extending forwards and supporting said at least one spring member, a positioning hole disposed at a front side thereof, and a sliding slot spaced between said at least one support rod and said positioning hole and coupled to said top through hole and bottom through hole of said base frame block by a pivot pin, said control member being movable forwards relative to said base frame block to compress said at least one spring and automatically returnable to the former position thereof by said at least one spring member when the applied pressure is disappeared.