Adjustable Bench Leg Support With Locking and Rotational Stop
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Solution Overview
Problem
Existing exercise benches lack sufficient adjustability and stability, limiting their versatility and usability for various exercises.
Innovation Solution
An adjustable bench design featuring a leg support that can be selectively engaged in two configurations - a fixed angular position or a freely rotatable position, along with independent pivotability of the seat and back supports, enhanced by a strut and brace system for stability and adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the leg support is fixed at a predefined angular position, then the bench provides stability for exercises, but the adjustability and versatility are limited
Solution Approach 1:
The leg support is designed to be dynamically adjustable between multiple configurations. A pin mechanism allows the leg support to be selectively positioned at different angular orientations relative to the seat support, enabling transitions between fixed and freely rotatable states. This dynamic adjustability resolves the contradiction by providing both stability during exercise and versatility for different exercise positions.
Solution Approach 2:
The leg support is segmented into discrete angular positions through the pin-aperture mechanism. The seat support includes multiple apertures arranged in a circular pattern, allowing the leg support to be locked at specific predefined angles. This segmentation provides stable, discrete positions while maintaining overall adjustability.
2Adaptability or versatility
If the leg support is freely rotatable, then the versatility and exercise variety increase, but the stability decreases
Solution Approach 1:
The system allows the leg support to transition between freely rotatable and fixed states. When versatility is needed, the pin can be removed to allow free rotation. When stability is needed, the pin is inserted into one of the apertures to lock the leg support at a predefined angle, thus dynamically adjusting the balance between versatility and stability.
3Adaptability or versatility
If multiple adjustment mechanisms are added for seat and back supports, then the versatility improves, but the device complexity increases
Solution Approach 1:
The pin mechanism serves multiple functions: it adjusts the leg support angle, and when combined with the aperture pattern on the seat support, it enables multiple exercise configurations. This universal adjustment mechanism reduces overall system complexity compared to having separate mechanisms for each adjustment function.
Data Source
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AI summary
An adjustable bench includes a frame and a hinge. A back support is pivotably coupled to the hinge and has a back cushion. A seat support has a first end defining apertures, a second end pivotably coupled to the hinge, and a seat cushion. A leg support is pivotably coupled to the first end at a pivot point defining a rotation axis for the leg support. The leg support is selectively engageable with one of the apertures via a pin. In a first configuration, the pin also engages with the leg support to define a fixed angular position of the leg support relative to the seat support. In a second configuration, the pin is engaged with one of the apertures without capturing the leg support such that the pin defines a rotational stop for the leg support and the leg support is movable at least partially around the rotational axis.