Double-Folding Stroller Frame Reduces Storage Volume
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Solution Overview
Problem
Conventional strollers can only fold once, resulting in an oversized volume when stored or carried, which does not meet user requirements for compactness.
Innovation Solution
A stroller design that allows for double folding, utilizing side support assemblies with transverse braces and specific folding rotation points to reduce volume, enabling the stroller to be folded twice for more compact storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the stroller is designed with conventional single folding mechanism, then the structure is simple, but the occupied volume when stored or carried is too large
Solution Approach 1:
The stroller frame is divided into multiple independently foldable components: side support assemblies, transverse braces, and connecting members. Each side support assembly can be folded separately around the transverse brace, enabling a two-stage folding process that progressively reduces volume from the extended state through an intermediate folded state to a compact final state.
Solution Approach 2:
The folding mechanism allows outer structural components to be nested within inner components during the folding process. The side support assemblies fold inward toward the central axis of the stroller, with the transverse braces serving as pivot points, creating a nested configuration that minimizes the overall occupied volume in the folded state.
2Volume of moving object
If the stroller is folded once, then the structure remains simple, but it still occupies an overlong space that cannot fit into vehicle trunks
Solution Approach 1:
The stroller employs dynamic folding mechanisms with multiple degrees of freedom, allowing the frame to transition through different configurational states. The side support assemblies are connected via rotatable joints that enable smooth transitions from the extended walking state to the intermediate folded state and finally to the compact storage state, with each stage offering different spatial characteristics.
Solution Approach 2:
The folding mechanism utilizes rotational movement around transverse braces to collapse the stroller frame in the lateral dimension. By pivoting the side support assemblies around the transverse brace axis, the overall width and length of the stroller are reduced, transforming the spatial occupation from a three-dimensional extended configuration to a more compact form suitable for vehicle trunk storage.
Data Source
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AI summary
The present disclosure provides a stroller capable of being folded twice, comprising: side support assemblies located at two sides and at least one transverse brace connected between the side support assemblies of the two sides, the side support assembly at each side comprises a push rod, a front wheel support (27, 28) and a rear wheel support (26, 20) which are rotatably connected to each other, and in a first folded state, the push rod, the front wheel support and the rear wheel support are rotated to be in a closed state; each transverse brace has a first transverse folding rotation point and a second transverse folding rotation point. The stroller is capable of achieving not only a first folding, but also a second folding of the two side support assemblies, so as to reduce the volume occupied by the entire stroller in these states.