Baby Stroller One-Step Folding Mechanism
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Solution Overview
Problem
Existing baby strollers require complex folding procedures involving multiple steps, making them inconvenient for storage and transportation.
Innovation Solution
A baby stroller design featuring a frame with a locking mechanism and torsional spring, allowing the upper and lower push rods to rotate and fold together with other components in a single step, facilitated by an unlocking mechanism using a pulling cable and belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stroller is designed to be foldable for storage and transportation convenience, then storage and transportation convenience is improved, but the folding procedure becomes complicated requiring multiple steps
Solution Approach 1:
The push rod is divided into upper and lower segments that can rotate relative to each other around the second rotating joint. This segmentation allows the folding action to be initiated by a single rotation at the second joint, which then triggers the coordinated folding of multiple frame components through the linkage mechanism, reducing the folding procedure to one step.
Solution Approach 2:
The locking mechanism is pre-positioned at the second rotating joint to lock the upper and lower push rods together in the unfolded state. When folding, unlocking this mechanism allows the pre-configured linkage to automatically guide all components through the folding motion, eliminating the need for manual coordination of multiple folding steps.
2Stability of the object's composition
If a locking mechanism is added to lock the frame in the unfolded state, then structural stability is improved, but device complexity increases
Solution Approach 1:
The locking mechanism is merged with the second rotating joint, combining the locking function with an existing structural element. This integration ensures the frame remains stable in the unfolded state without adding a separate, complex locking system, as the locking mechanism leverages the rotational motion already present at the joint.
3Ease of operation
If a torsional spring is added to drive automatic folding, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The torsional spring is configured to automatically drive the folding motion once the locking mechanism is unlocked. The spring stores energy in the unfolded state and releases it during folding, making the system self-actuating without requiring manual folding effort. This self-service mechanism reduces operational complexity by eliminating the need for user coordination of multiple folding actions.
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 simple and convenient one-step folding with reduced manual effort, utilizing a torsional spring for automatic folding and an unlocking mechanism for easy operation, enhancing storage and transportation convenience.
Implementation Method 1
a torsional spring is provided where the upper push rod and the lower push rod intersect to form the second rotating joint, and when the locking mechanism is unlocked, the upper push rod is driven by the torsional spring to roll forwards around the second rotating joint
Data Source
AI summary
A baby stroller includes a frame having front and rear wheel supports, a seat rod, a push rod and a support rod. The front and rear wheel supports form a first rotating joint. The push rod includes upper and lower push rods, the lower push rod is connected to the first rotating joint. The lower push rod and the upper push rod form a second rotating joint. The support rod is rotatably connected with the upper push rod. The support rod is rotatably connected with the rear wheel support. The seat rod is rotatably connected with the front wheel support. The seat rod is rotatably connected with the support rod. Rotating the upper push rod around the second rotating joint drives the lower push rod, the support rod, the front wheel support, the rear wheel support and the seat rod to fold the stroller.