US 12,291,257 B2
Frame of double-person baby carriage and frame folding mechanism thereof
Zongwang Cui, Steinhausen (CH)
Assigned to WONDERLAND SWITZERLAND AG, Steinhausen (CH)
Filed by WONDERLAND SWITZERLAND AG, Steinhausen (CH)
Filed on Aug. 16, 2023, as Appl. No. 18/450,661.
Application 18/450,661 is a continuation of application No. 17/391,681, filed on Aug. 2, 2021, granted, now 11,772,698.
Claims priority of application No. 202010768620.5 (CN), filed on Aug. 3, 2020.
Prior Publication US 2023/0391391 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B62B 7/06 (2006.01); B62B 7/00 (2006.01); B62B 9/12 (2006.01); B62B 9/20 (2006.01)
CPC B62B 7/068 (2013.01) [B62B 7/008 (2013.01); B62B 7/062 (2013.01); B62B 9/12 (2013.01); B62B 9/20 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A frame folding mechanism comprising an extended position and a folded position, wherein the frame folding mechanism further comprises:
an upper link and a lower link, the upper link and the lower link are arranged in parallel in a horizontal direction and spaced apart in a vertical direction;
a middle upright rod vertically connected between the upper link and the lower link;
an upper supporting rod, a first end of the upper supporting rod being pivotally connected to the upper link;
a lower supporting rod, a first end of the lower supporting rod being pivotally connected to the lower link;
a foot frame arranged in a vertical direction, a top end of the foot frame being pivotally connected to a second end of the upper supporting rod, and a bottom end of the foot frame being pivotally connected to a second end of the lower supporting rod;
a first positioning member which selectively resists below the upper link; and
a second positioning member fixedly connected to one end of the foot frame
wherein when the frame folding mechanism is in the folded position, the second positioning member is coupled to the foot frame so as to fix the foot frame relatively, and
wherein the second positioning member includes an engage block and a convex post, a first foot frame is provided with the engage block, and a second foot frame is provided with the convex post, the engage block is provided with an elongated hole, and the convex post is clamped in the elongated hole.