Friction-Based Weight Bar Securing Device
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Solution Overview
Problem
Existing weightlifting equipment lacks effective solutions to prevent weight plates from sliding off the ends of weight bars, leading to potential damage and bodily injury, as current clamps and screw-on stops are either cumbersome, time-consuming to install, or allow lateral movement, causing instability during workouts.
Innovation Solution
A securing device comprising a cover member with a resilient member and friction region that wraps around the weight bar, exerting a frictional force to limit axial movement, which is adjustable, easy to apply and remove, and scalable for various dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spring clamps are used to restrict axial movement of weight plates, then axial movement is limited, but the clamps can slide axially upon experiencing sufficient forces and are difficult to properly align and squeeze
Solution Approach 1:
The securing device automatically secures to the bar upon application without requiring user squeezing or alignment adjustments. The resilient member and friction region work together to create immediate holding force when the device is placed on the bar, eliminating the need for manual compression and alignment that plagues traditional spring clamps
Solution Approach 2:
The invention replaces the mechanical spring compression system with a friction-based holding mechanism. Instead of relying on spring force that must be manually compressed and maintained, the device uses friction between the cover member and bar surface to create holding force, which is applied passively when the device is placed on the bar
2Reliability
If screw-on stops are installed on weight bar ends, then weight plates cannot fall off completely, but installation and removal are time-consuming and lateral movement is still permitted causing instability
Solution Approach 1:
The securing device transitions from a static fixed position (screw-on stops) to a dynamic adjustable position that can be quickly applied and removed. The friction-based mechanism allows the device to be placed on the bar at different positions and maintains secure holding through friction rather than mechanical fastening, enabling rapid installation and removal
Solution Approach 2:
The invention extracts the time-consuming threading and unthreading operations from the securing mechanism. By replacing screw-on stops with a friction-based device that simply needs to be placed on the bar, the installation and removal process is reduced to a single quick action without rotational fastening operations
3Reliability
If traditional clamps are used to restrict axial movement, then some axial movement is limited, but the clamps are susceptible to sliding axially under sufficient force and weight plates can still become detached
Solution Approach 1:
The invention changes the fundamental parameter of holding force from spring compression force to friction force. The friction region is designed to create sufficient frictional resistance against axial forces based on the normal force from the resilient member, providing reliable holding that scales with the applied load rather than being limited by spring force capacity
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 securing device provides a fast, safe, and adjustable means to restrict weight plate movement on weight bars, reducing the risk of injury and instability while allowing quick installation and removal, and can be easily mass-produced for different sizes.
Implementation Method 1
a resilient member, and a first friction region disposed on the first surface of the cover member. The resilient member is at least partially disposed between the first surface and the second surface of the cover member and is movable between at least a first resting configuration and a second resting configuration
Implementation Method 2
the friction region contacts the elongated bar and exerts a frictional force thereon to limit movement of the cover member in an axial direction of the elongated bar
Data Source
AI summary
A securing device includes a cover member having a first surface, a second surface disposed opposite the first surface, a first end, and a second end disposed opposite the first end, a resilient member, and a first friction region disposed on the first surface of the cover member. The resilient member is at least partially disposed between the first surface and the second surface of the cover member and is movable between at least a first resting configuration and a second resting configuration. The cover member is adapted to at least partially wrap around an elongated bar when the resilient member is positioned in the second configuration such that the friction region contacts the elongated bar and exerts a frictional force thereon to limit movement of the cover member in an axial direction of the elongated bar.