Foldable Stroller Frame Linkage with Extension Arms
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Solution Overview
Problem
Existing foldable baby stroller frames are cumbersome to assemble and become overly complex when accommodating dual seats, leading to difficulties in the folding operation.
Innovation Solution
A stroller frame design featuring a wheeled support, lower support joint, upper support, and connecting joint that form a foldable linkage system with push bars and an actuator, allowing for simultaneous movement from an erect to a collapsed position, and includes extension arms for securing multiple seats or an infant carrier, simplifying the assembly and use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional linkage system is used for foldable stroller, then the stroller can be folded, but the assembly process becomes troublesome and complex
Solution Approach 1:
The stroller frame is divided into separate modular components: wheeled support, lower support joint, upper support, and connecting joint. Each component can be independently manufactured and assembled, reducing overall complexity while maintaining folding functionality. The segmentation allows for simpler assembly procedures compared to traditional integrated linkage systems.
Solution Approach 2:
The lower support joint is designed with multiple extension arms that can accommodate various configurations (single seat, dual seats, infant carrier). This multi-functional design eliminates the need for separate linkage systems for different configurations, simplifying the overall structure while maintaining folding capability across all usage scenarios.
2Adaptability or versatility
If the linkage system is extended to accommodate dual seats, then more seating capacity is achieved, but the folding operation becomes problematic
Solution Approach 1:
The extension arms are designed as dynamic components that can move relative to the lower support joint during the folding process. This dynamic design allows the arms to clear each other during folding regardless of whether one or two seats are attached, eliminating folding problems while maintaining dual-seat capacity when needed.
Solution Approach 2:
The extension arms utilize rotational movement in a second dimension (perpendicular to the main folding plane) to accommodate dual seats. This dimensional approach allows the arms to position seats without interfering with the primary folding motion, enabling smooth folding operation even with dual-seat configurations.
3Adaptability or versatility
If the stroller frame is designed to secure multiple seats, then versatility is improved, but the structure becomes more complex
Solution Approach 1:
The lower support joint with its multiple extension arms serves as a universal mounting structure that can accommodate single seats, dual seats, or infant carriers. This single multi-functional structure replaces what would otherwise require multiple separate mounting systems, achieving versatility without proportionally increasing structural complexity.
Solution Approach 2:
The extension arms are integrated directly into the lower support joint structure, merging the seat mounting function with the support structure. This integration eliminates the need for separate mounting brackets and hardware, reducing overall structural complexity while maintaining the ability to secure multiple seats in various configurations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances convenience and usability by simplifying the folding process and allowing for secure attachment of multiple seats or an infant carrier, reducing the complexity and effort required for folding and storage.
Implementation Method 1
an actuator associated with a flexible element, to control the rotation of each push bar
Implementation Method 2
the connecting joint is driven by the push bars and can carry the wheeled support, the lower support joint, and the upper support, which are moved simultaneously from an erect position to a collapsed position
Data Source
AI summary
A stroller frame including a wheeled support, a lower support joint, an upper support, and a connecting joint that commonly form a foldable linkage system. The wheeled support has a pair of push bars and an actuator associated with a flexible element, so as to control the rotation of each push bar. When the end of the push bar is released, the connecting joint is driven by the push bars and carries the wheeled support, the lower support joint, the upper support, which are simultaneously rotated and moved from an erect position to a collapsed position. The upper support is furnished with a connector for detachably securing a stroller seat, a safety seat, or an infant carrier. In addition, the lower support joint may extend upwardly with a plurality of extension arms for detachably securing two seats, two safety seats or an infant carrier. This provides a stroller frame having multiple uses and greater convenience.