Adjustable Width Baby Stroller Frame with Removable Cross-bars
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Solution Overview
Problem
Existing baby strollers face challenges in adapting to different sizes and weights of cradles or seats, leading to structural bulkiness and instability, especially when transforming from a large, heavy stroller to a portable, light one, and vice versa, without compromising stability and ease of use.
Innovation Solution
A baby stroller frame composed of semi-frames with adjustable horizontal cross-bars that can be fixed in multiple positions, allowing for the attachment of either framed or sewn seats/cradles, enabling width adjustments to accommodate various sizes and weights, while maintaining structural reliability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the frame width is adjusted by changing the structure of the lower portion of the support of the rear wheels, then the width adjustment is simplified, but the structure becomes less reliable as the base and backrest may return to their initial position if the fastening member is damaged
Solution Approach 1:
The frame is divided into separate components: the lower portion of the support of rear wheels is separated from the base and backrest. This segmentation allows the support to be adjusted independently while maintaining the structural integrity of the base and backrest, preventing them from returning to their initial position if the fastening member is damaged.
Solution Approach 2:
The fastening member is extracted as a separate, replaceable component from the frame structure. This allows the fastening member to be easily replaced if damaged, maintaining the reliability of the overall frame structure while allowing for simple width adjustment operations.
2Adaptability or versatility
If the frame width is adjusted by mounting additional inserts and using connecting buckles, then the stroller can transform from single-seated to double-seated, but the structure becomes more complex and less stable on rough roads
Solution Approach 1:
The lower portion of the support of rear wheels is designed as a universal component that can serve multiple functions: it can be adjusted in width to accommodate different seating configurations (single-seated or double-seated) while maintaining a simple, robust structure that remains stable on rough roads.
3Adaptability or versatility
If the frame width is adjusted by using fastening members on the central cross-frame support and side shafts, then the stroller can accommodate different seat sizes and weights, but the structure becomes bulkier and less portable
Solution Approach 1:
The fastening members are extracted as separate, removable components from the main frame structure. This allows the frame to maintain a compact, lightweight design for portability while still accommodating different seat sizes and weights through the use of these separate fastening members when needed.
Data Source
AI summary
The invention relates to a field of a transport driven manually, namely, to baby strollers, and it is intended to allow an alternate use of different variants of a baby cradle or seat which differ in a size and in a weight on a frame thereof. A baby stroller having a frame with adjustable width, the frame consists of front wheel supports hingedly connected between each other, rear wheel supports which are equipped with wheel mounting assemblies, and handle supports, comprising a removable seat or cradle fixed on mounting places, wherein horizontal cross-bars are arranged between the supports of the rear wheels and front wheels. According to the invention, the frame consists of two semi-frames, and the horizontal cross-bars are made adjustable in length and arranged on each of the semi-frames so as to be fixable at least in a first frame adjustment position and at least in a second frame adjustment position.