Angled-Joint Stroller Frame With Compact-Folding Suspension
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Solution Overview
Problem
Jogging strollers are large in collapsed or folded configurations, making them difficult to transport and store, and existing suspension systems do not effectively absorb shock during use.
Innovation Solution
A collapsible stroller with a foldable frame assembly that includes angled joints and suspension systems allowing the stroller to pivot into a compact configuration, featuring independent strut assemblies and shock absorbers for smooth riding and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suspension system is added to improve ride smoothness, then the stroller becomes larger and more difficult to transport and store
Solution Approach 1:
The suspension strut assemblies are designed to nest within the frame structure when the stroller is folded. The struts collapse into the hollow frame tubes, and the shock absorbers are positioned to fit within the overall frame envelope, allowing the suspension system to be integrated without significantly increasing the folded volume of the stroller.
Solution Approach 2:
The suspension system uses dynamic shock absorbers that can extend and retract based on terrain conditions. When the stroller is in use, the shock absorbers extend to provide suspension travel. When folded, the shock absorbers retract into a compact position, minimizing the increased volume during transport and storage.
2Volume of moving object
If the top frame pivots towards the bottom frame to form a collapsed configuration, then the stroller becomes more compact, but the strut assemblies and suspension systems must also pivot which complicates the mechanism
Solution Approach 1:
The strut assemblies are positioned asymmetrically relative to the frame pivot axis, with angled mounting points that allow the struts to pivot naturally as the frame collapses. This asymmetric configuration enables the strut assemblies to follow an optimized pivot path that reduces interference with other components and simplifies the overall folding mechanism.
Solution Approach 2:
The folding mechanism is divided into independent pivot points: the main frame pivot between top and bottom frames, and separate pivot points for each strut assembly. This segmentation allows each component to pivot independently along its own path, reducing mechanical interference and simplifying the overall folding action into a sequence of independent rotational movements.
Data Source
AI summary
Various embodiments of a collapsible stroller configured to form at least a compact collapsed configuration are described. In some embodiments, the collapsible stroller includes a foldable frame assembly including a top frame pivotably coupled to a bottom frame such that the top frame is allowed to pivot along a longitudinal plane of the foldable frame assembly. The foldable frame assembly can include first strut assemblies pivotably coupled to the bottom frame at respective angled joints. The angled joints can each include a first axis of rotation that is angled relative to the longitudinal plane such that the strut assemblies pivot towards the longitudinal plane as the top frame pivots towards the bottom frame for forming the collapsed configuration. In some embodiments, the foldable frame assembly further includes a suspension system that also can pivot towards the longitudinal plane when the foldable frame assembly forms the collapsed configuration.