Hidden Braking Device Locking Mechanism
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Solution Overview
Problem
Conventional hidden braking devices experience ineffective braking due to wear of the connecting unit's hole, requiring continuous grip on the brake handle for uninterrupted braking, leading to inconvenience and inefficiency.
Innovation Solution
The hidden braking device incorporates a locking set and adjusting set with a penetrating sliding trough and fixing notches, utilizing a first spring unit to facilitate quick adjustment of the main frame length and reduce engaging force, allowing simultaneous movement of the upper and lower stems for smooth braking, and a brake control set with a pulley and limiting recesses for uninterrupted braking action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional connecting unit with a hole is used to connect upper stem and lower stem, then the structure is simple, but the hole wears away easily causing ineffective braking
Solution Approach 1:
The connecting unit is divided into separate components: the upper stem with sliding trough, the lower stem, and the elastic unit with fixing notches. This segmentation eliminates the worn hole problem by replacing the single-hole design with a multi-component system where the elastic unit engages with fixing notches on the sliding trough, providing reliable connection without wear issues.
Solution Approach 2:
The connecting unit incorporates dynamic elements including the elastic unit that can flex and the locking unit that can engage or disengage. This allows the system to transition between locked and adjustable states, maintaining reliability while enabling adjustment when needed. The dynamic locking mechanism ensures the lower stem remains securely connected during braking.
2Reliability
If the user continuously grips the brake handle to maintain braking action, then the braking is uninterrupted, but the ease of operation deteriorates
Solution Approach 1:
The brake control set incorporates a self-latching mechanism where the brake handle can be engaged to activate braking, and the system maintains the braking action automatically without requiring continuous user grip. The mechanical latch or spring mechanism holds the brake member in the engaged position, allowing the user to release the handle while maintaining uninterrupted braking.
Solution Approach 2:
The brake control set is designed to maintain continuous braking action once initiated. The brake member remains engaged with the wheel set through the self-latching mechanism, ensuring the useful action of braking continues uninterrupted without requiring sustained user input. This allows the braking function to persist autonomously after initial activation.
3Adaptability or versatility
If the main frame length is adjusted by sliding upper frame and lower frame, then the adaptability is improved, but the adjustment time increases
Solution Approach 1:
The adjusting set incorporates pre-positioned fixing notches on the sliding trough at predetermined intervals along the upper stem. These pre-prepared engagement points allow for quick selection and locking of the desired frame length without requiring complex adjustment procedures. The locking unit can rapidly engage with any of the pre-positioned notches, significantly reducing adjustment time while maintaining adaptability.
Solution Approach 2:
The sliding trough features locally distributed fixing notches at specific positions along its length, providing discrete adjustment points. This localized arrangement of engagement points allows the locking unit to quickly snap into the desired position without requiring continuous adjustment mechanisms, enabling fast frame length changes while maintaining multiple length options for adaptability.
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 quick adjustment of the main frame length, increases user convenience, and maintains uninterrupted braking action without continuous grip on the brake handle, enhancing the overall effectiveness and usability of the braking device.
Implementation Method 1
an elastic unit positioned between the positioning case and the engaging case and inserted into the sliding trough to be engaged with the fixing notches
Implementation Method 2
a first spring unit disposed on the operating unit
Implementation Method 3
a brake control set with a pulley and limiting recesses for uninterrupted braking action
Data Source
AI summary
A hidden braking device includes a brake handle, a brake member controlling a wheel set, and a connecting member disposed in a main frame having telescoping upper and lower frames. The connecting member has an upper stem connected to the brake handle and having fixing notches, a lower stem connected to the brake member, a locking set disposed on the lower frame and mainly including a locking unit, and an adjusting set connected to both stems. The adjusting set mainly has an operating unit on which a first spring unit is disposed, an engaging case and a positioning case disposed relative to each other, and an elastic unit located between both cases and engaged with the fixing notches. The first spring unit pushes the operating unit while loosening the locking unit to thereby position the engaging case and adjust a full length of the main frame quickly.