Patent ID: 8746730

Claim:
A foldable frame, mounted between a front wheel support and a rear wheel support of a foldable vehicle, comprising: (a) a first upper bar; (b) a first lower bar; (c) a second upper bar; (d) a second lower bar; (e) a first pin joint piece; and (f) a second pin joint piece, wherein the first pin joint piece and the second pin joint piece are respectively provided with a first pin joint hole and a second pin joint hole; an end of the first lower bar is pin-jointed with a lower end of the front wheel support, and another end of the first lower bar is fixed with the first pin joint piece; an end of the second lower bar is pin-jointed with a lower end of the rear wheel support, and another end of the second lower bar is fixed with the second pin joint piece; the first pin joint piece is pin-jointed with the second pin joint piece through the first pin joint hole, and end surfaces of the first pin joint piece and the second pin joint piece respectively abut against end portions of the second lower bar and the first lower bar; an end of the first upper bar is pin-jointed with the front wheel support, and another end of the first upper bar is pin-jointed at the second pin joint hole of the second pin joint piece; an end of the second upper bar is pin-jointed with the rear wheel support, and another end of the second upper bar is pin-jointed at the second pin-joint hole of the first pin joint piece.