Stroller Brake Positioning Structure for False-Brake Prevention
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Solution Overview
Problem
Conventional brake devices for strollers are prone to false-brake issues, where the brake lever may not engage properly with the brake tooth structure, leading to improper locking and potential release during sudden impacts, especially on slopes, due to the smooth surface of the elastic portion and improper engagement with the protruding pillar.
Innovation Solution
A false-brake prevention device is designed with a positioning structure on the brake pedal or brake base, featuring a lock slot, release slot, and an elastic portion with first and second return regions of gradually reducing height, allowing the elastic portion to move inclinedly and automatically engage or disengage the brake lever with the brake tooth structure, ensuring proper locking and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the elastic portion has a smooth surface for easy deformation, then the ease of operation is improved, but the reliability of engagement deteriorates
Solution Approach 1:
The elastic portion is designed with different surface qualities in different regions: the first return region has a smooth surface for easy deformation, while the second return region has a rough surface for reliable engagement with the protruding pillar. This local differentiation resolves the contradiction by providing both ease of operation and engagement reliability where needed.
2Ease of manufacture
If the brake lever structure is simple for easy manufacturing, then the ease of manufacture is improved, but the reliability of false-brake prevention deteriorates
Solution Approach 1:
The elastic portion is segmented into two distinct return regions with different surface characteristics. This segmentation allows the structure to remain relatively simple for manufacturing while providing differentiated functionality: one region for easy deformation and another for reliable engagement prevention, thereby solving the false-brake problem without excessive complexity.
3Ease of operation
If the brake device allows easy release for convenience, then the ease of operation is improved, but the stability of locking state deteriorates
Solution Approach 1:
Different regions of the elastic portion provide different operational characteristics: the smooth first return region enables easy release operation, while the rough second return region ensures stable locking engagement. This local quality differentiation resolves the contradiction between release convenience and locking stability.
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
The solution effectively prevents false-brakes by ensuring the brake lever engages correctly with the brake tooth structure, enhancing operational reliability and safety by automatically adjusting to the false-brake state and facilitating secure locking and release.
Implementation Method 1
the protruding pillar pushes the elastic portion to deform outwardly
Data Source
AI summary
A false-brake prevention device includes a wheel shaft, a positioning structure, a protruding pillar, a wheel hub rotatably disposed on the wheel shaft, a brake base connected to the wheel shaft, and a brake pedal pivotally connected to the brake base and having a brake lever for engaging with a brake tooth structure of the wheel hub. The positioning structure is formed on one of the brake pedal and the brake base, and has lock and release slots and an elastic portion formed therebetween. A first return region is connected to a transition region and formed on a side surface of the elastic portion with a gradually reducing height from the transition region to the lock slot. The protruding pillar is formed on the other one of the brake pedal and the brake base for pushing the elastic portion and for engaging with the lock slot or the release slot.