Foldable Baby Stroller Compact Folding Mechanism
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Solution Overview
Problem
Conventional baby strollers are bulky and difficult to fold into a compact configuration, making them challenging to transport in situations like air travel, subways, and tight spaces.
Innovation Solution
A foldable baby stroller design featuring collapsible telescoping support shafts, pivot assemblies, and rotating legs that allow the stroller to fold into a compact size small enough to fit in a diaper bag or backpack, with a hinged handle and locking mechanisms for easy configuration between extended and folded states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional baby stroller designs are used, then structural stability and support are maintained, but the stroller becomes bulky and difficult to fold into compact configurations
Solution Approach 1:
The stroller is divided into multiple independent segments including telescoping support shafts with multiple sections, separate leg assemblies (front and rear), and modular seat components. Each segment can be independently folded or collapsed, allowing the entire structure to be disassembled into compact portions that fit within small storage containers.
Solution Approach 2:
The support shafts utilize a nested telescoping structure where smaller diameter shaft sections are inserted within larger diameter sections. When folded, the stroller components nest within each other, with legs collapsing inward and seat portions folding into the central support structure, achieving a compact configuration similar to nested dolls.
2Weight of moving object
If the stroller is designed to fold compactly, then portability is improved, but the structural complexity increases
Solution Approach 1:
The stroller employs dynamic folding mechanisms where components can transition between extended and collapsed states. The support shafts telescop with locking mechanisms that engage at various lengths, while leg assemblies pivot at multiple joints to collapse from a rigid extended position to a compact folded position, providing adaptability between transport and use states.
Solution Approach 2:
Multiple structural functions are merged into single components. The support shafts simultaneously provide structural support, act as folding hinges, and serve as storage containers when collapsed. The leg assemblies combine wheel mounting, structural support, and folding hinge functions in integrated units, reducing the total number of separate parts despite the complex folding capability.
3Volume of moving object
If telescoping support shafts are used, then compact folding is achieved, but locking reliability becomes critical
Solution Approach 1:
The locking mechanisms are designed with redundant safety features that prevent accidental unlocking. Spring-loaded locking pins engage automatically when telescoping sections are extended, and multiple locking points are provided along the shaft length. The design includes backup retention features that would prevent collapse even if one locking mechanism fails, cushioning against potential reliability issues.
Data Source
AI summary
A foldable baby stroller that can comprise collapsible telescoping support shafts connected by a hinged handle. Pivot assemblies support the support shafts and two pairs of legs including at least one pair of rotating legs and one pair of fixed legs, each leg including an attached wheel. The pair of rotating legs when in a closed configuration fit below, adjacent, and parallel to the fixed pair of legs with the attached respective wheels of each pair arranged in tandem. A hinged support brace links the pair of pivot assemblies and locks in an extended configuration. Two seat supports attaching a seat to the stroller and fold upward 90° to facilitate configuring between the extended configuration and folded configuration by folding upward. The pivot assemblies facilitate folding the support shafts when in the retracted configuration, and the two pairs of legs when in the retracted configuration, together into the folded configuration.