Patent ID: 6315307
Filing Date: 2001-11-13
Classification: B62K

Abstract:
A collapsible scooter comprising a foot board (10), a steering assembly including a head tube (20) pivotally connected at a front end of the foot board (10) and a handlebar stem (12) telescopically attached to a top portion of the head tube (20), a front wheel rotatably mounted at a lower end of the steering assembly and a rear wheel rotatably mounted at a rear end of the foot board (10), wherein the improvements comprise:a strut (30) having an upper end and a lower end, the upper end being pivotally connected to the head tube (20), and the lower end being pivotally connected to the foot board (10), the upper end of the strut (30) further having a nose (32) formed at a front side thereof near the head tube (20), a lip (34) formed at a rear side thereof, a groove (36) defined between the nose (32) and the lip (34), and a pivot hole (38) defined in the nose (32);a frame plate (22) having an C-shaped cross section being securely mounted on the head tube (20) near an upper end of the head tube (20), and at least one side of the frame plate (22) being defined with a pivot slot (24) which consists of a lateral section (242), a bayonet (244) at a first end of the lateral section (242) and an upright section (246) at a second end of the lateral section (242);a locking device (26) having an axle (262) with two ends, a trigger bar (264) fixed at one of the ends of the axle (262), the other end of the axle (262) being extended through the pivot hole (38) of the strut (30) and the pivot slot (24) of the frame plate (22), and threadingly engaged with a nut (266);whereby when the head tube (20) is extended to an upright operation position, the axle (262) of the locking device (26) is inserted into the bayonet (244) of the frame plate (22) and a front lower edge of the frame plate (22) is inserted into the groove (36) of the strut (30), then the locking device (26) tightly locks the strut (30) with the head tube (20) in the operation position, so that the head tube (20) of the scooter is securely retained and prohibited from any pivotal movement relative to the foot board (10).