Weighted Bag With Tube Structure For Impact Noise Reduction
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Solution Overview
Problem
Existing weightlifting devices, whether rigid or flexible, face issues such as noise, damage, and lack of versatility due to unpredictable forces and non-uniform loading, with rigid devices causing impact damage and flexible devices prone to seam failure and leakage.
Innovation Solution
A weighted bag design featuring a flexible outer shell with an inner cavity containing particulate material, a tube structure for connecting to handles or implements, and an inner bag for filling, along with mesh baffles for stabilization, allowing for adjustable handle length and reduced stress concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid weightlifting devices are used, then structural strength is improved, but noise and impact damage increase
Solution Approach 1:
The patent employs a flexible outer shell made of durable material that can deform during impact, absorbing shock energy and reducing noise compared to rigid weights. The flexible shell maintains structural integrity while allowing controlled deformation to mitigate harmful impacts.
Solution Approach 2:
The weightlifting device combines flexible outer shell material with internal filler material to create a composite structure that provides both the strength needed for weightlifting and the flexibility needed to reduce impact noise and damage.
2Object-generated harmful factors
If flexible weightlifting devices are used, then noise is reduced, but reliability deteriorates due to seam failure and leakage
Solution Approach 1:
The outer shell is constructed from flexible yet durable material designed to resist tearing and seam failure under repeated stress, while maintaining the noise-reducing flexibility needed for quiet operation during weightlifting exercises.
Solution Approach 2:
The bag employs a rounded, spheroidal shape that distributes stress more evenly across the material surface, reducing stress concentrations at corners and edges that would otherwise lead to seam failure and material breakdown.
3Ease of manufacture
If flexible bags with stitched handles are used, then ease of manufacture is improved, but reliability worsens due to stress concentrations at stitching locations
Solution Approach 1:
The handle is integrated as a continuous flexible component made from the same durable material as the outer shell, eliminating stitched joints and their associated stress concentrations while maintaining ease of manufacturing through integrated construction.
4Adaptability or versatility
If rigid weightlifting devices are used, then versatility is limited, but device complexity is reduced
Solution Approach 1:
The flexible weightlifting bag can be used for multiple exercises including lifting, carrying, throwing, and various strength training movements, providing versatility across different workout types while maintaining a relatively simple single-piece construction.
Data Source
AI summary
A bag includes an outer shell formed of one or more flexible panels connected together to define an inner cavity configured to contain a particulate material, with the outer shell having a first or top end, a second or bottom end opposite the first end, and an opening providing access to the inner cavity. A tube structure extends through the outer shell from the first end to the second end of the outer shell. The tube structure includes a first opening in the first end of the outer shell, a second opening in the second end of the outer shell, and a tube extending through the inner cavity of the outer shell, from the first opening to the second opening. The tube is configured to receive an implement, such as a rope or a handle assembly, therethrough to connect the bag to the implement.