Elastomeric Coated Swing Weight with Quick Release Knob
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Solution Overview
Problem
Existing weighted training devices for racket-based sports often slip or move on the racket strings during use, are difficult to adjust and balance, and can damage the strings or the device itself due to poor attachment mechanisms.
Innovation Solution
A swing weight training device with an over-molded elastomeric coating and a quick attachment knob system that securely attaches to the racket strings without damaging them, featuring a low friction surface and a quick release mechanism for easy attachment and removal, allowing asymmetric weighting and protection of the strings and device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If weights are attached directly to the strings or racket using fixed attachment mechanisms, then the training device provides stable weighting, but the device slips or moves on the racket during use and is difficult to adjust or remove
Solution Approach 1:
The attachment mechanism transitions from fixed to dynamic, allowing the weight to be quickly adjusted and removed. The quick-release system enables the attachment state to change rapidly between secured and released positions, providing both stability during use and ease of adjustment when needed.
Solution Approach 2:
The attachment system is divided into separate components: the weight unit with elastomeric coating, the mounting stud, and the quick-release knob. This segmentation allows independent optimization of each component's function while enabling easy assembly and disassembly of the entire weighting system.
2Reliability
If weights are attached directly to the strings or racket, then the training device provides stable weighting, but the attachment mechanism can damage the strings or the device itself
Solution Approach 1:
The elastomeric coating acts as an intermediary material between the weight and the racket strings. This soft, compliant layer distributes attachment forces over a larger area, preventing concentrated stresses that could damage the strings or racket frame while maintaining secure attachment.
Solution Approach 2:
The elastomeric coating changes the physical parameters of the attachment interface by providing a softer, more compliant surface. This material property change allows the attachment mechanism to exert sufficient holding force while reducing peak stresses below damage thresholds for the strings and racket.
3Ease of operation
If a quick release mechanism is used for easy attachment and removal, then the device is easy to operate, but the attachment may not be secure enough during use
Solution Approach 1:
The quick-release mechanism utilizes dynamic principles where a small rotational motion of the knob generates sufficient clamping force through mechanical advantage. The attachment transitions rapidly from a loose state to a securely clamped state, maintaining reliability while enabling easy operation.
Solution Approach 2:
The quick-release mechanism changes the mechanical parameters of the attachment system by using threaded engagement or cam action to convert a small input force into a large clamping force. This parameter transformation allows secure attachment with minimal user effort and enables rapid release when needed.
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 device provides a secure, easy-to-use attachment system that prevents slipping and damage, enhances training performance by allowing adjustable weighting, and protects the racket strings and device from wear and injury.
Implementation Method 1
An over-molded elastomeric coating encasing a mass provides a soft surface to grab the strings and keep the swing weight from moving or sliding on the strings
Implementation Method 2
The handle can be comprised of a harder low friction material that can turn easily against the string material or incorporate a washer or bushing that allows easy attachment and removal of the device
Data Source
AI summary
A swing weight training device for stringed sports rackets includes two major parts designed to be secured together from opposing sides of the racket strings, to be quickly secured and removed without damage to the strings. An over-molded elastomeric coating encases a mass, providing a soft surface to grab the strings and keep the swing weight from moving or sliding on the strings. The over-mold material may also cover a portion of an attachment mounting stud that protrudes between the strings. An opposing quick attachment knob receives a portion of the stud projecting through strings, securing the mass with a low friction material that slides easily against the racket's strings without damage and providing a quick but secure attachment of the device to the strings of the racket. The knob may have either a threaded attachment or a quick release mechanism incorporated within the stud attachment system.