US 11,724,729 B2
Child trailer with low folding thickness
Yunpeng Sun, Changzhou (CN)
Assigned to CHANGZHOU EASYLIFE PRODUCTS CO., LTD., Changzhou (CN)
Filed by CHANGZHOU EASYLIFE PRODUCTS CO., LTD., Changzhou (CN)
Filed on May 27, 2021, as Appl. No. 17/331,667.
Claims priority of application No. 202120273792.5 (CN), filed on Jan. 29, 2021.
Prior Publication US 2022/0242473 A1, Aug. 4, 2022
Int. Cl. B62B 9/12 (2006.01); B62B 7/02 (2006.01); B62K 27/00 (2006.01)
CPC B62B 9/12 (2013.01) [B62B 7/02 (2013.01); B62K 27/003 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A child trailer with a low folding thickness, comprising a bottom frame and a side frame, wherein a front end of the bottom frame is rotationally connected with a front end of the side frame;
a top support rod is fixed at a rear end of the side frame; a left end and a right end of the top support rod are respectively connected with an upper-section tail support rod rotating around an axis of the top support rod; a tail end of the upper-section tail support rod is connected with a first end of a folding joint; a second end of the folding joint is connected with a lower-section tail support rod; a rear end of the bottom frame is connected with a tail rack rotating around a shaft parallel to the axis of the top support rod; and a tail end of the lower-section tail support rod is rotationally connected with a middle part of the tail rack;
a folding locking member matched with the tail rack is fixed on the lower-section tail support rod or the upper-section tail support rod; and
rear wheels are mounted on a rear side of the bottom frame, and a towing rod device extending forward is fixed at a bottom of a front side of the bottom frame,
wherein the folding joint comprises a first rotating block, a second rotating block and a rotating piece; the first rotating block is fixedly connected with an upper connecting part; the upper connecting part is fixed to the upper-section tail support rod; the second rotating block is fixedly connected with a lower connecting part; the lower connecting part is fixed to the lower-section tail support rod; the rotating piece is located on a rear side of the first rotating block and a rear side of the second rotating block; two ends of the rotating piece are respectively hinged at a middle part of the first rotating block and a middle part of the second rotating block; and rotating piece grooves matched with the rotating piece are respectively formed on the rear side of the first rotating block and the rear side of the second rotating block; and
wherein an upper part of the tail rack is provided with two U-shaped bending parts; a middle part of each U-shaped bending part protrudes toward a rear side of the child trailer, an included angle of each U-shaped bending part is between 100° and 110°, and when the child trailer is unfolded, the tail rack is attached to the upper-section tail support rod, the folding joint and the lower-section tail support rod.