Patent ID: 7059441

Claim:
A mount frame for an electric motor-driven wheeled vehicle, comprising: a first frame unit including first front and rear frame portions opposite to each other in a first longitudinal direction, and a second frame unit including second front and rear frame portions opposite to each other in a second longitudinal direction, wherein: said first rear frame portion has an anchoring member which has a bearing wall that faces in a first upright direction transverse to the first longitudinal direction, and a gripped member which has a gripped wall that faces in the first longitudinal direction; said second front frame portion having a seat post member which is elongated in a second upright direction transverse to the second longitudinal direction, and an anchored member including an axial shaft which extends along a rotational axis in an axial direction transverse to the second longitudinal and upright directions and which is disposed to be journalled on said bearing wall of said anchoring member about the rotational axis and right and left pins which are disposed opposite to each other along the rotating axis and outboard to said axial shaft, such that said second rear frame portion is rotatable relative to said first frame unit about the rotational axis between a first position, where the second upright direction is coincident with the first longitudinal direction, and a second position, where the second longitudinal and upright directions are coincident with the first longitudinal and upright directions, respectively, said second front frame portion further having a gripping member which has a gripping wall that is to be brought to confront said gripped wall of said gripped member in the first longitudinal direction when said second rear frame portion is turned from the first position to the second position; said mount frame further comprising a tightening unit disposed to push said gripping wall to abut tightly against said gripped wall when said second rear frame portion is in the second position.