Stroller Folding Structure With Sliding Rear Wheel Assemblies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing strollers with one front wheel and two rear wheels have a bulky folded structure, making them difficult to carry due to a large packaging volume.
Innovation Solution
A stroller design featuring a frame that transitions from an unfolded to a folded configuration by symmetrically arranging rear wheel assemblies and using a slider mechanism to bring the rear wheels towards the seat frame in both the front-rear and left-right directions, facilitated by linkage mechanisms and guiding rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stroller uses a conventional folding structure with one front wheel and two rear wheels, then it provides convenience for children in outdoor activities, but the folded structure is not compact enough and the packaging transportation volume is large
Solution Approach 1:
The patent applies dimensionality change by transitioning the rear wheel assemblies from a lateral arrangement (left-right direction) to a longitudinal arrangement (front-rear direction) during folding. The guiding rails constrain the rear supports to move primarily in the front-rear direction, while the linkage mechanisms coordinate the motion to reduce the stroller's width. This dimensional transformation allows the folded stroller to achieve a more compact profile suitable for storage and transportation.
2Stability of the object's composition
If the rear wheel assemblies are symmetrically arranged relative to the virtual plane, then the stroller provides stability in unfolded configuration, but the folded structure occupies more space
Solution Approach 1:
The patent employs dynamics by designing the rear support upper end portions to be slidably connected to the seat frame, allowing them to move dynamically between extended and retracted positions. The guiding rails and linkage mechanisms enable the rear wheel assemblies to transition smoothly from a stable symmetric arrangement in the unfolded state to a compact configuration in the folded state. This dynamic design maintains stability when needed while minimizing volume when folded.
Data Source
AI summary
A stroller includes a frame having an unfolded configuration and a folded configuration, the frame has a virtual plane perpendicular to a horizontal plane, a first wheel assembly, a second wheel assembly and a third wheel assembly are disposed below a front portion of the frame, the second wheel assembly and the third wheel assembly are symmetrically arranged relative to the virtual plane. The frame includes: a seat frame configured to be connected with a seat for sitting a child; a front support, wherein the first wheel assembly is disposed at a lower portion of the front support. A rear support includes a left rear support and a right rear support symmetrically arranged relative to the virtual plane, the left rear support and the right rear support are slidably connected to the seat frame respectively.