Retractable Stroller Enclosure Locking Mechanism
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Solution Overview
Problem
Existing baby strollers with retractable mechanisms for switching between single and double seats lack stability and safety due to the retractable upper enclosure being prone to extension under external forces, compromising safety.
Innovation Solution
A baby stroller design featuring a retractable upper enclosure with a fixed rod and telescopic rod, equipped with a female locking buckle, sub-locking buckle, and trigger mechanism, allowing for stable extension and retraction through a spring button and positioning blocks, ensuring the enclosure remains locked and stable in both configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the retractable upper enclosure is designed without a locking mechanism to allow free extension and retraction, then the ease of operation is improved, but the stability and safety deteriorate as the enclosure becomes prone to unintended extension under external forces
Solution Approach 1:
The locking mechanism automatically engages when the telescopic rod extends to its full length, and automatically disengages when retracted, without requiring manual intervention. The spring-loaded positioning block provides automatic locking based on the extension state, eliminating the need for separate locking operations while maintaining stability
Solution Approach 2:
The positioning block with spring mechanism pre-prevents unintended extension by automatically engaging the locking position before any external force can cause accidental extension. The mechanism is designed to resist external forces that might otherwise cause unstable extension
2Reliability
If a locking mechanism is added to the retractable upper enclosure to improve stability and safety, then the reliability is improved, but the device complexity increases due to additional components
Solution Approach 1:
The locking mechanism is integrated into the existing telescopic rod structure, with the positioning block becoming part of the rod assembly. The spring mechanism is housed within the same structural envelope, combining the locking function with the existing extension/retraction mechanism rather than adding separate external components
Solution Approach 2:
The positioning block is nested within the telescopic rod, and the spring mechanism is nested within the positioning block structure. The locking components are contained within the existing structural boundaries, minimizing additional space and complexity while providing the required locking function
Data Source
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AI summary
The present invention relates to a baby stroller capable of implementing free switching between a single seat and double seats, comprising a stroller body, wherein a retractable chassis is provided at the bottom of the stroller body, a retractable upper enclosure is mounted at a middle portion of the stroller body, the retractable upper enclosure comprises a fixed rod and a telescopic rod, the fixed rod and the telescopic rod each are hollow in a U shape, universal wheels are mounted at the bottom of the retractable chassis, and the telescopic rod is slidably connected in the fixed rod. According to the present invention, areas of an upper enclosure and a chassis of the stroller are reduced at the same time by means of the upper enclosure of the retractable chassis, so as to implement the retraction of the stroller body, and freely switch between the single seat and the double seats. The retractable upper enclosure has a locking function. By arranging a spring button, a sub-locking buckle, and a female locking buckle, the sub-locking buckle is locked with the female locking buckle when the spring button is not pressed, and the telescopic rod of the retractable upper enclosure does not extend out of the fixed rod, thereby improving the stability of the retractable upper enclosure after locking, and improving the safety of the baby stroller.