Hoop-Rolling Device With Square Retaining Ring
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Solution Overview
Problem
Existing fitness devices with hoop-rolling functionality often face issues such as control difficulties due to thin, rounded hoops, ineffective retainers, and lack of accommodation for users of varying heights, as well as materials that are not resilient enough for extended play.
Innovation Solution
A hoop-rolling device featuring a durable hoop with a flat, wide outer periphery and a propelling shaft with a handle and a square-shaped retaining ring, allowing easy hoop insertion and removal, made from materials like PVC for durability and portability, accommodating users of different heights and environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a thin, rounded hoop is used, then the device is lighter and easier to manufacture, but control difficulties arise
Solution Approach 1:
The patent changes the geometric parameters of the hoop from thin and rounded to thick and rectilinear with a flat outer periphery. This parameter change increases the hoop's moment of inertia and provides a broader contact surface, improving control while maintaining reasonable weight through efficient material distribution.
Solution Approach 2:
The patent specifies using resilient material for the hoop, suggesting a composite or specially formulated material that combines durability, resilience, and appropriate weight. The resilient material allows the thick rectilinear hoop to maintain controlability while being lightweight enough for active recreation.
2Device complexity
If a standard retaining ring is used, then the device structure is simpler, but the retainer is ineffective for extended play
Solution Approach 1:
The patent applies local quality by making the retaining ring square-shaped with specifically designed aperture dimensions that match the hoop's cross-section. This localized geometric adaptation at the retention interface provides superior holding capability compared to a standard circular retainer, ensuring reliability for extended play while maintaining overall structural simplicity.
3Manufacturing precision
If the device is designed for a specific user height, then the structure is more optimized, but it cannot accommodate users of varying heights
Solution Approach 1:
The patent designs the hoop-rolling device with universal dimensions that can accommodate users of varying heights. The rectilinear hoop with flat outer periphery and the proportionally scaled retaining ring create a device that adapts to different user sizes without requiring multiple specialized versions, achieving both optimization and versatility.
4Strength
If non-resilient material is used, then the device is more durable in terms of structural integrity, but it is not suitable for extended play
Solution Approach 1:
The patent specifies using resilient material for the hoop that combines structural integrity with elastic properties. This resilient material allows the hoop to withstand repeated impacts and deformations during extended play while maintaining its shape and functionality, achieving both strength and durability for prolonged use.
Data Source
AI summary
A hoop-rolling device is used by children and adults for fitness and recreation. An illustrative embodiment includes a hoop and a shaft, with a generally square-shaped ring retaining the hoop, which is used to propel and control the hoop. The ring defines a small aperture permitting selective insertion and removal of the hoop. The shaft also includes a curved handle. The device is constructed of rigid materials to allow for extended play on a variety of solid surfaces.