Stroller Frame Folding Mechanism for One-Handed Automatic Folding
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Solution Overview
Problem
Existing stroller frames require simultaneous two-handed operation to unlock and fold, causing inconvenience.
Innovation Solution
A stroller frame design with a handle assembly, folding mechanism, and unlocking mechanism that allows one-handed operation and automatic folding by utilizing rotating shafts and locking mechanisms that can be unlocked sequentially, enabling the frame to fold automatically when kept upright.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a locking structure is used to lock the stroller frame when unfolded, then the stability of the stroller is improved, but the complexity of the unlocking operation increases
Solution Approach 1:
The locking structure is divided into multiple independent locking portions (first locking portion, second locking portion, third locking portion) that can be unlocked sequentially. Each locking portion corresponds to a different rotating shaft, allowing the frame to be folded in stages rather than requiring simultaneous two-handed operation on a single centralized lock.
Solution Approach 2:
The locking mechanism transitions from a static centralized lock to a dynamic sequential unlocking system. The first rotating shaft is locked by the first locking portion, the second rotating shaft by the second locking portion, and the third rotating shaft by the third locking portion. This dynamic segmentation of locking functions enables one-handed operation while maintaining frame stability when unfolded.
2Ease of operation
If multiple locking structures are distributed on different rotating shafts, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
Multiple locking portions are designed with identical or similar structural configurations, each serving the same locking function but applied to different rotating shafts. This universal design approach allows the system to achieve one-handed operation without proportionally increasing overall complexity, as each locking portion can be manufactured and assembled using the same methodology.
3Ease of operation
If the locking mechanism is simplified for one-handed operation, then the ease of operation is improved, but the reliability of the locking system may deteriorate
Solution Approach 1:
The locking system is segmented into multiple independent locking portions, where failure or improper engagement of one locking portion does not necessarily compromise the others. This segmentation provides redundancy and ensures that the frame remains securely locked even if one locking mechanism experiences minor issues.
Solution Approach 2:
Instead of using a single complex centralized lock that requires two-handed operation, the design inverts the approach by distributing multiple simpler locking portions across different rotating shafts. This inversion achieves both one-handed operation capability and enhanced reliability through distributed locking.
Data Source
AI summary
Provided are a stroller frame and a stroller. A first rotating shaft and a second rotating shaft are provided at intervals on a stroller folding mechanism of the stroller frame, which is hinged to a handle assembly through the first rotating shaft, and is hinged to one end of a handrail assembly through the second rotating shaft; the handle assembly is hinged to a rear foot assembly through a third rotating shaft, the rear foot assembly is provided with a fourth rotating shaft, and one end of the handrail assembly and one end of a front foot assembly are both hinged to the rear foot assembly through the fourth rotating shaft; and the seat assembly has one side hinged to the handle assembly through a fifth rotating shaft and the other side hinged to the front foot assembly through a sixth rotating shaft.