Weighted Bracelet Using Stacked Metal Bars
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Solution Overview
Problem
Existing weighted bracelet devices for muscle building and joint stabilization are cumbersome, unattractive, and lack optimal load distribution, with issues of sand leakage and inflexibility in shaping into a ring.
Innovation Solution
A weighted bracelet device featuring a stack of parallelepiped metal bars within a flexible elastomeric sheath and cap, allowing for adjustable weight and discreet, compact design, with trapezoidal bars for optimal space occupation and aesthetic materials like canvas or leather for the outer case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If sand is used as weighting material in a bag-like case, then the device can be made heavy for muscle reinforcement, but the device becomes cumbersome and not discreet
Solution Approach 1:
The patent changes the material parameter from sand to metal bars, which have significantly higher density. This allows the same weight to be achieved with much smaller volume, making the bracelet more compact and discreet while maintaining the muscle reinforcement function
Solution Approach 2:
The patent uses a composite structure combining metal bars (for weight) with flexible elastomeric material (for form and comfort). This composite approach allows the device to be both heavy enough for effective exercise and flexible enough to conform to the wrist discreetly
2Weight of moving object
If sand is used as weighting material, then the device can provide load for muscle building, but sand leakage can occur if the bag is pierced
Solution Approach 1:
The patent replaces the reusable but leak-prone sand-filled bag with solid metal bars that cannot leak. The metal bars are permanently contained within the elastomeric sheath, eliminating the reliability issue of sand leakage while maintaining the weight function
Solution Approach 2:
The patent uses a flexible elastomeric sheath to contain the metal bars. This sheath provides containment without the leakage risks of fabric bags, while still allowing the bracelet to flex and conform to the wrist for comfortable wear
3Ease of operation
If spaced masses are connected by flexible elements to enable ring shaping, then the device becomes flexible, but the load optimization is compromised
Solution Approach 1:
The patent segments the weight into multiple individual metal bars rather than using a single mass or sand. These bars are stacked within the elastomeric sheath, allowing them to be closely packed for optimal weight distribution while maintaining flexibility for ring shaping
Solution Approach 2:
The patent nests the metal bars within the elastomeric sheath, with each bar fitting closely within the confined space. This nesting arrangement optimizes the use of available volume for weight while the sheath provides the flexibility needed to form a ring
Data Source
Figure 1~2c
Figure 3
AI summary
Weighted bracelet device for muscle strengthening exercises. It comprises: - a cover (2), made of an elastomeric material, - a multitude of parallelepiped bars (1) made of metal, stacked and contained within the cover (2), to form a band, - a sheath-shaped case (3), made of a flexible material, suitable for housing the band formed by said cover (2) in which the bars (1) are stacked, equipped with a closure means, as well as at its ends (31, 32) fastening means (33, 34) allowing it to be given an annular shape, said flexible material having external aesthetic characteristics.