Elevating Rims for Back Roller Height Adjustment
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Solution Overview
Problem
The limited height of standard back rollers restricts the user's ability to achieve maximum flexibility during exercises, as the diameter of the roller limits the bending arc of the back, and existing solutions either integrate non-removable hubs or do not provide adequate elevation.
Innovation Solution
Elevating rims with a central axle that allow the hubs to be connected and adjusted, providing varying diameters for increased elevation, stability, and different connection mechanisms such as threaded or telescoping couplings, and featuring ribbed designs for grip and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the diameter of the back roller is increased to allow greater back bending, then the user's flexibility is improved, but the roller becomes harder to roll on the ground and occupies more space
Solution Approach 1:
The invention divides the roller system into two functional parts: a small-diameter rolling section that contacts the ground and a large-diameter elevated section that supports the back. This segmentation allows the roller to provide both ground-contact stability and sufficient back-bending clearance without requiring the entire roller to have a large diameter.
Solution Approach 2:
The invention transitions from a single-dimension solution (increasing overall roller diameter) to a multi-dimensional solution by adding vertical elevation through hubs. The hubs raise the central rolling surface above the ground, creating vertical space for back bending while maintaining a compact horizontal footprint.
2Strength
If hubs are integrated with the roller to provide elevation, then the structural strength is improved, but the adaptability to change elevation is lost
Solution Approach 1:
The invention makes the hub elevation dynamic rather than fixed. Hubs are designed to be removable and replaceable, allowing users to adjust the elevation height by swapping hubs with different dimensions. This dynamic design maintains structural strength during use while providing adaptability for different exercise requirements.
Solution Approach 2:
The hub design incorporates universal features that allow multiple functions: structural support during exercise, removable attachment for adjustment, and interchangeability with different hub sizes. The standardized connection mechanism enables a single roller body to work with multiple hub options, providing versatility while maintaining strength.
3Adaptability or versatility
If removable hubs with various diameters are used to adjust elevation, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The invention extracts the elevation-adjustment function into separate, removable hub components that can be independently selected and attached. This extraction allows the main roller body to remain simple while the adjustable hubs provide the necessary complexity only when needed, reducing overall system complexity compared to an integrated adjustable mechanism.
Data Source
AI summary
Elevating rims allow the central hub of a back roller to be elevated from the ground. Elevating the back roller allows the user to increase their flexibility as they bend their back over the central roller. A user can purchase one or a set of rims to interchange the back roller and rims to accommodate different stretching and exercises. The joining mechanism can be threaded coupling in one or both of the hubs or can be a telescoping connection with or without a spring-loaded pin in a hole. The rims can have ribs to allow an installer to grip the rim and twist the rim on an axle. The back roller can be fabricated with an internal thread where changeable rims can be threaded into the inner diameter of the back roller to change the amount of elevation.