Foldable Stroller Frame with Locking Rear Foot Pivot
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Solution Overview
Problem
Conventional strollers have a large folded size due to handles being connected to front supports, making them cumbersome for transportation and storage, and they are unreliable when a seat is installed, as the rear supports can deform or turn over easily.
Innovation Solution
A foldable stroller design with a frame that includes a handle, front foot, rear foot, and carrier support, where the rear foot is pivoted to the handle and connected via rods, and a locking component between the rear foot and handle to prevent rotation, allowing for compact folding and stable operation, along with a fixing base and engaging assembly for the seat to fold with the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the handle is connected to the front support in a conventional stroller, then the structure is simple, but the folded size becomes large and cumbersome for transportation
Solution Approach 1:
The stroller frame is divided into separate pivotable components: the handle can pivot relative to the front support, and the rear support can pivot relative to the front support. This segmentation allows each component to be independently positioned during folding, enabling a more compact folded configuration while maintaining structural simplicity.
2Ease of operation
If the seat is installed at the joints of the front supports and rear supports, then the installation is convenient, but the rear supports become unstable and may deform or turn over
Solution Approach 1:
The front support acts as an intermediary component that connects the handle and rear support through pivot joints. This intermediary structure provides a stable triangular configuration that distributes loads effectively, preventing the rear support from deforming or turning over while still allowing convenient seat installation at the joints.
3Adaptability or versatility
If the rear support is connected to the front support with excessive length, then the upper portions can accommodate seat installation, but the rear support becomes prone to stretching and deformation
Solution Approach 1:
The connection between the rear support and front support is made dynamic through a pivot joint instead of a rigid fixed connection. This allows the rear support to rotate toward the front support for folding while maintaining structural integrity during operation, preventing excessive stretching and deformation while still providing adequate length for seat installation.
Data Source
AI summary
A foldable stroller includes a frame and a locking component. The frame includes a handle, a front foot, a rear foot, and a carrier support. An upper end of the front foot is pivoted to the handle. An upper end of the rear foot is pivoted to the handle. The carrier support includes at least one connecting rod. An end of the at least one connecting rod is pivoted to the front foot, and the other end of the at least one connecting rod is pivoted to the rear foot. The locking component is installed between the rear foot and the handle. The locking component locks rotation of the rear foot relative to the handle when the foldable stroller is unfolded. Due to aforementioned structure, the foldable stroller is not only reliable in operation but also has a smaller occupied space after being folded.