Patent ID: 11919559
Assignee: GOODBABY CHILD PRODUCTS CO., LTD.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A stroller comprising a frame having an unfolded state and a folded state, a front wheel assembly, a rear wheel assembly, a locking mechanism for locking the frame in the unfolded state, and the frame comprises:
a front wheel support, the front wheel assembly is arranged at a lower portion of the front wheel support, and a sliding sleeve is fixedly arranged on an upper portion of the front wheel support;
a rear wheel support, the rear wheel assembly is arranged at a lower portion of the rear wheel support, and an upper portion of the rear wheel support is rotatably connected to the upper portion of the front wheel support;
a telescopic push rod assembly, the push rod assembly comprises an upper push rod and a lower push rod, the upper push rod and the lower push rod are slidably arranged relative to each other, the lower push rod is slidably arranged in the sliding sleeve in a penetrating manner in the length direction thereof, and a lower end portion of the lower push rod is located below the sliding sleeve;
a basket rod, the front end of the basket rod is rotatably connected to the lower end portion of the lower push rod, and the rear portion of the basket rod is rotatably connected to the rear wheel support;
a seat rod extending in a front-rear direction, a rear portion of the seat rod extends downwards and is rotatably connected to the lower end portion of the lower push rod; and
a supporting rod, an upper end portion of the supporting rod is rotatably connected to a front portion of the seat rod, and a lower end portion of the supporting rod is rotatably connected to the front wheel support; when the frame is converted from the unfolded state to the folded state, the lower push rod slides downwards relative to the sliding sleeve;
wherein the locking mechanism comprises:
a first locking mechanism for locking the relative positions of the upper push rod and the lower push rod, and when the first locking mechanism is unlocked, the upper push rod slides downwards relative to the lower push rod, and when the upper push rod slides downwards to the end point, it collides with the lower push rod and generates an impact force, and the impact force acts on the lower push rod;
a second locking mechanism for locking the relative positions of the lower push rod and the sliding sleeve, and when the locking mechanism is unlocked, the first locking mechanism is unlocked first, and the impact force drives the second locking mechanism to get unlocked;
the second locking mechanism comprises a retractable lock tongue arranged on the lower push rod and a lock hole arranged on the sliding sleeve, the lock tongue is inserted into the lock hole when the second locking mechanism is in a locked state, and the impact force is used to drive the lock tongue to retract from the lock hole to unlock the second locking mechanism.