Child Stroller Frame Linkage for One-Step Rear-Wheel Folding
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Solution Overview
Problem
Existing child stroller frames require multiple operating steps and bending over to fold the rear wheels, making them cumbersome and inconvenient to use.
Innovation Solution
A child stroller frame design that allows concurrent folding of the first and second frame portions, rear wheel support member, and linkage mechanism, enabling simultaneous folding of the rear wheel without additional steps or bending over.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate folding mechanism is provided for the rear wheels, then the rear wheel can be folded independently, but the folding operation becomes more cumbersome and requires multiple steps
Solution Approach 1:
The patent merges the folding operation of the rear wheel with the folding operation of the stroller frame. The linkage mechanism connects the rear wheel support member to the frame, so that when the frame is folded, the rear wheel automatically folds along with it. This eliminates the need for separate folding operations and reduces the number of steps required.
Solution Approach 2:
The linkage acts as an intermediary mechanism that transfers the folding motion from the frame to the rear wheel support member. Through the linkage connection, the folding action of the frame is transmitted to automatically fold the rear wheel, eliminating the need for direct manual operation of the wheel folding mechanism.
2Volume of moving object
If the folding mechanism is placed at a lower position, then the structure can be more compact, but the caregiver needs to bend over to operate it
Solution Approach 1:
The patent changes the spatial arrangement by positioning the linkage mechanism in an upper region of the stroller frame. This dimensional repositioning allows the folding mechanism to be operated from an ergonomic height for the caregiver, while still achieving compact folding through the linkage's mechanical action.
3Ease of manufacture
If the first frame portion and wheel support member are independently folded, then each component can be optimized, but the folding process becomes more complex
Solution Approach 1:
The patent combines the folding operations of the first frame portion and the wheel support member into a single concurrent folding action. The linkage mechanism ensures that both components fold together in a coordinated manner, simplifying the overall folding process while maintaining the benefits of having separately optimized components.
Data Source
AI summary
A child stroller frame includes a first and a second frame portion, a pivoting part connected fixedly with a wheel support member and pivotally connected with the second frame portion, and a linkage. The first frame portion includes a handle frame segment, a front leg segment, and a coupling part that pivotally connects the handle frame segment with the front leg segment, and the second frame portion is pivotally connected with any of the handle frame segment, the front leg segment and the coupling part. The linkage has a first end pivotally connected with any of the handle frame segment, the front leg segment and the coupling part, a second end pivotally connected with the pivoting part, and an intermediate portion pivotally connected with the second frame portion, whereby the first frame portion and the wheel support member are movably linked for folding concurrently toward the second frame portion.