Fitness Seat Back Locking Mechanism for Safe Angle Adjustment
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Solution Overview
Problem
Conventional fitness apparatus seat back adjustment mechanisms risk accidental release due to shared handles for adjustment and locking, potentially causing user injury or muscle strain from sudden exertion.
Innovation Solution
A lockable pressure adjustment seat design separates angle adjustment and locking functions using a lever, pressure bar, and locking set, where the lever slides on a slide track, and a locating rod with an elastic member secures the seat back's inclination without requiring the user to handle the locking mechanism directly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same handle is used for both adjustment and locking of the seat back, then the device complexity is reduced, but the reliability of preventing accidental release deteriorates
Solution Approach 1:
The patent divides the adjustment and locking functions into separate components: a pressure bar for adjustment and a locating rod for locking. This segmentation allows independent operation of each function, preventing accidental release while maintaining manageable device complexity through modular design.
Solution Approach 2:
The pressure bar acts as an intermediary component between the user's manual input and the seat back adjustment mechanism. It translates user force into controlled movement while the separate locating rod independently manages locking, creating a safety buffer against accidental releases.
2Ease of operation
If the adjustment and locking operations are combined in one handle, then the ease of operation is improved, but the harmful factors (accidental injury risk) increase
Solution Approach 1:
By separating adjustment (pressure bar) and locking (locating rod) into distinct components, the patent eliminates the risk that a single accidental handle operation could cause both release and injury. Each component requires intentional, separate manipulation, reducing harmful accidental effects while maintaining operational simplicity.
Solution Approach 2:
The patent converts the potential harm of accidental handle operation into benefit by designing the pressure bar and locating rod as separate components. What could have been a dangerous combined function becomes two safe, independent functions where accidental operation of one does not affect the other.
3Reliability
If a separate locking mechanism is introduced, then the reliability of locking is improved, but the device complexity increases
Solution Approach 1:
The patent introduces a separate locking mechanism (locating rod) that works independently from the adjustment mechanism (pressure bar). This segmentation improves locking reliability by dedicating a specific component to locking function, while the overall complexity remains manageable through clear functional separation and simple mechanical design.
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
This design ensures safe operation by preventing accidental release of the seat back's inclination, allowing users to adjust and lock the seat back independently, enhancing user safety and preventing muscle strain.
Implementation Method 1
The locking set includes an elastic member and a locating rod. The elastic member pushes the locating rod to penetrate through the through hole of the extension rod and further into the locating hole of the base to be secured in position.
Data Source
AI summary
A lockable pressure adjustment seat of a fitness apparatus includes a base, a seat back, and an adjustment unit. The base is disposed with a slide track and a locating hole. The seat back is pivotally connected to the base. The seat back includes an extension rod. One end of the extension rod is linked and fixed to the seat back. A through hole is disposed adjacent to the other end of the extension rod. The adjustment unit includes a lever, a pressure bar, and a locking set. The lever penetrates the slide track. The pressure bar includes a push rod and a fixation base. The push rod holds against the lever. The fixation base is secured to the other end of the extension rod. The locking set is fixed to the fixation base, and comprises an elastic member and a locating rod.