Child Stroller Frame Linkage for Concurrent 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 featuring a first and second frame portion, a pivoting part, and a linkage that allows concurrent folding and unfolding of the rear wheel support member without additional steps, by integrating the rear wheel support member with the frame portions through a linkage mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate folding mechanism is provided for the rear wheels, then the rear wheels can be folded, but the caregiver has to bend over to operate the folding mechanism and requires multiple operating steps
Solution Approach 1:
The patent merges the folding operation of the rear wheels with the folding operation of the stroller frame. By integrating the rear wheel folding mechanism into the frame folding mechanism, the system achieves concurrent folding of both the frame and rear wheels in a single operation, eliminating the need for separate folding steps and removing the need for the caregiver to bend over to operate a separate rear wheel folding mechanism.
Solution Approach 2:
The frame folding mechanism is designed to serve multiple functions: it folds the frame structure and simultaneously folds the rear wheels. This multi-functional design allows a single mechanism to perform what would traditionally require two separate mechanisms, thereby simplifying the overall operation and improving ease of use.
2Ease of operation
If the folding mechanism of the rear wheels is placed at a lower position, then the rear wheels can be folded, but the caregiver needs to bend over to operate the folding mechanism
Solution Approach 1:
By merging the rear wheel folding mechanism with the frame folding mechanism, the invention eliminates the need for a separate low-positioned rear wheel folding mechanism that would require the caregiver to bend over. The unified mechanism operates at a convenient height and position, allowing the caregiver to fold the stroller without physical strain.
3Adaptability or versatility
If multiple separate mechanisms are used for folding the frame and rear wheels, then each component can be folded independently, but the overall folding process becomes cumbersome
Solution Approach 1:
The patent combines multiple folding operations into a single concurrent action. The frame folding mechanism is mechanically linked to the rear wheel folding mechanism such that when the caregiver operates the frame folding mechanism, the rear wheels fold simultaneously. This concurrent folding operation maintains the adaptability of independent folding while dramatically improving folding speed and efficiency.
Solution Approach 2:
The unified folding mechanism serves multiple functions simultaneously: it folds the frame structure and folds the rear wheels in one operation. This multi-functionality allows the system to achieve the versatility of independent folding while improving productivity by reducing the total number of operations required.
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
Enables convenient folding and unfolding of the stroller frame without the need to bend over, reducing the number of steps and improving user convenience.
Implementation Method 1
The pivoting part has one end fixedly connected with a rear wheel support member, and another end pivotally connected with the second frame portion
Implementation Method 2
The linkage includes a plurality of bars, a first one of the bars being formed integrally as a single body having a first bar portion and a second bar portion that intersect each other at an angle
Data Source
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AI summary
A child stroller frame (100) includes a first frame portion (1), a second frame portion (2), a pivoting part (3), and a linkage (5) movably coupling the first frame portion (1) to the pivoting part (3). The second frame portion (2) has a first end and a second end, the first end of the second frame portion (2) being pivotally connected with the first frame portion (1). The pivoting part (3) has one end fixedly connected with a rear wheel support member (4), and another end pivotally connected with the second frame portion (2). The linkage (5) includes a plurality of bars (511, 512, 521), a first one (511) of the bars being formed integrally as a single body having a first bar portion (5111) and a second bar portion (5112) that intersect each other at an angle, the second frame portion (2) being pivotally connected with the first bar (511) in a region thereof where the first bar portion (5111) joins with the second bar portion (5112), whereby the first frame portion (1) and the wheel support member (4) are movably linked for folding in a concurrent manner toward the second frame portion (2).