Offset Center of Gravity Weight Collar Self-Locking
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Solution Overview
Problem
Conventional weight collars often fail to secure weights properly on weightlifting bars, leading to safety hazards and can appear securely attached even when they are not, and they may wear out over time due to moving parts or rubber components.
Innovation Solution
A weight collar design with a bar engaging section and a weight engaging section, featuring an offset center of gravity and a spring mechanism for self-locking, which ensures secure retention without moving parts and reduces wear, utilizing an annular surface and angled design to prevent weight slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional weight collars are used to retain weights on weightlifting bars, then weight retention is provided, but the collars can fail to secure weights properly leading to safety hazards
Solution Approach 1:
The weight collar is designed with an offset center of gravity that automatically causes the collar to rotate and lock onto the weightlifting bar without requiring user intervention. The collar self-adjusts to the correct orientation where the weight engaging section contacts the weight, eliminating the need for manual securing and preventing improper installation.
Solution Approach 2:
The weight collar employs an asymmetric design with the center of gravity deliberately offset from the geometric center. This asymmetry creates a self-locking mechanism where the collar naturally rotates to a specific orientation on the bar, ensuring the weight engaging section is positioned correctly to contact and secure the weight.
2Reliability
If conventional weight collars with moving parts and rubber components are used, then weight retention is achieved, but the components wear out over time reducing reliability
Solution Approach 1:
The invention removes all moving parts and rubber components from the weight collar design. The collar consists entirely of rigid structural elements that engage through geometric interlocking and gravitational forces, eliminating parts that are subject to wear and degradation over time.
Solution Approach 2:
The design transitions from using compliant rubber materials and moving mechanical parts to a rigid, static structural configuration. By changing the physical parameters of the materials and the nature of the engagement mechanism, the collar achieves wear-free operation while maintaining reliable weight retention.
3Reliability
If conventional weight collars are designed with securing mechanisms, then weight retention is provided, but the collars can incorrectly appear to be properly secured creating a false sense of safety
Solution Approach 1:
The offset center of gravity design ensures the collar automatically assumes the correct orientation on the bar, with the weight engaging section naturally positioned to contact the weight. This self-adjusting mechanism eliminates the possibility of incorrect installation, making proper securing inevitable rather than dependent on user skill or attention.
Solution Approach 2:
Instead of designing a collar that requires the user to achieve a specific orientation through force or manipulation, the invention inverts the approach by designing the collar to naturally seek and lock into the correct orientation through its center of gravity, making improper installation physically impossible.
4Reliability
If conventional weight collars with moving parts are used, then weight retention is achieved, but the moving parts can fail during use when integrity is needed most
Solution Approach 1:
All moving parts are completely removed from the weight collar design. The collar functions entirely through static geometric engagement between rigid components, eliminating any elements that could fail due to motion, fatigue, or mechanical stress during weightlifting operations.
Solution Approach 2:
The collar is constructed from rigid materials that maintain their structural properties under load, using geometric design rather than mechanical fasteners or joints. The monolithic or firmly bonded construction ensures uniform strength throughout the structure, preventing failure points that would arise from assembled moving parts.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The weight collar provides reliable and secure weight retention on weightlifting bars, preventing sliding and wear, ensuring safety and longevity by using a self-locking mechanism and eliminating the need for moving parts.
Implementation Method 1
The center of gravity of the weight collar is orthogonally offset from the central axis of the opening, as described above, so that the weight collar will rotate about the central axis until the weight engaging section hangs below the weightlifting bar.
Implementation Method 2
The spring exerts a biasing force against the weightlifting bar such that the bar engaging section imparts a nominal gripping force on the weightlifting bar when the weight is not engaging the weight engaging section.
Implementation Method 3
The bar engaging section in turn imparts a gripping force on the weightlifting bar via the annular surface, thus preventing the weight from sliding off the weightlifting bar.
Data Source
AI summary
A weight collar for retaining a weight on a bar, comprising a bar engaging section having an opening for receiving the bar therethrough and a weight engaging section having proximal and distal ends, the weight engaging section extending from the bar engaging section so as to extend at least partially toward the weight when the bar engaging section receives the bar through the opening, the bar engaging section being configured to engage the bar with a gripping force as the weight exerts a rotational force on the distal end of the weight engaging section so as to prevent the weight from sliding off the bar, the distal end of the weight engaging section being orthogonally spaced at least 1 inch from a central axis of the opening, a center of gravity of the collar being orthogonally spaced at least 0.1 inches from the central axis toward the distal end.