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 with a linkage mechanism that allows the rear wheel support member to fold concurrently with the frame portions, eliminating the need for separate operation and bending over.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate folding mechanism is provided for the rear wheels, then the stroller frame can be folded, but the operation becomes more cumbersome and requires multiple steps
Solution Approach 1:
The patent merges the folding function of the rear wheel support member with the folding function of the frame portions. The linkage mechanism couples the first frame portion to the pivoting part, so that when the first frame portion is folded relative to the second frame portion, the rear wheel support member automatically folds concurrently without requiring a separate folding operation. This integration reduces the number of operating steps while maintaining the folding capability.
2Ease of operation
If the folding mechanism is placed at a lower position, then the structure is compact, but the caregiver needs to bend over to operate it
Solution Approach 1:
The linkage mechanism is designed to automatically perform the folding action of the rear wheel support member when the frame portion is folded. The pivoting part and linkage coupling are positioned such that the folding motion of the first frame portion preliminarily drives the rear wheel support member to fold as well, eliminating the need for the caregiver to bend over and manually operate a separate folding mechanism at a lower position.
3Productivity
If the rear wheel support member is folded separately, then the folding mechanism can be simple, but additional operating steps are required
Solution Approach 1:
The patent combines the folding operations into a single action. The linkage mechanism ensures that when the caregiver folds the first frame portion relative to the second frame portion, the rear wheel support member folds concurrently as part of the same motion sequence. This merging of operations reduces the number of discrete steps required while maintaining structural simplicity.
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 additional steps, reducing the effort required and allowing for compact storage.
Implementation Method 1
a linkage coupling the first frame portion to the pivoting part, wherein the linkage includes a bent bar having a concavity
Implementation Method 2
the second frame portion having a front end pivotally connected to the first frame portion
Data Source
AI summary
A child stroller frame includes a first frame portion and a second frame portion connected to each other, the second frame portion having a front end pivotally connected to the first frame portion, a pivoting part mounted with a wheel support member and pivotally connected to a rear end of the second frame portion, and a linkage coupling the first frame portion to the pivoting part, wherein the linkage includes a bent bar having a concavity, the child stroller frame being foldable to have the wheel support member or a portion of the pivoting part that couples to the wheel support member positioned adjacent to the concavity of the bent bar.