Arrow Rest Cord Adjustment Device Using Orthogonal Torque Binding
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Solution Overview
Problem
Existing cord length adjustment devices for mechanized arrow rests are inefficient and prone to slippage due to their multi-part mechanical clamp/compression approach, requiring frequent adjustments to account for cord stretching over multiple shots, which affects system performance.
Innovation Solution
A one-piece mechanical device that utilizes cord tension and geometric mounting features to apply orthogonal torquing force and binding effects, allowing for quick, repeatable, and secure adjustments of the cord length through a combination of a plate section, openings, a compression ring, and detents, enhancing the binding force without slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-piece mechanical clamp/compression approach is used to adjust cord length, then the cord can be captured in two places for adjustment, but the device is prone to slippage and requires frequent adjustments
Solution Approach 1:
The patent combines multiple adjustment functions into a single integrated one-piece device that simultaneously provides cord capture, tension application, and length adjustment capabilities, eliminating the slippage issues associated with multi-part clamp structures
Solution Approach 2:
The device uses the cord's own tension force to automatically secure itself in the adjusted position through the interaction of geometric mounting features and the compression ring, eliminating the need for separate locking mechanisms and preventing slippage
2Ease of operation
If compression force is reduced to adjust cord length, then the cord length can be changed, but the adjustment is not secure and slips over time
Solution Approach 1:
The device automatically secures itself in the adjusted position by utilizing the cord tension to engage the geometric mounting features and compression ring, providing both ease of adjustment and secure long-term retention without separate locking steps
Solution Approach 2:
The geometric mounting features are pre-configured to automatically engage and lock the cord at the desired length during the adjustment process, ensuring the adjustment remains secure before any shooting occurs
3Productivity
If a one-piece mechanical device with tension-based securing is used, then quick and secure adjustments are achieved, but the device complexity increases
Solution Approach 1:
The device uses variations in geometric mounting feature shapes and orientations to create multiple functional elements (cord capture, tension application, positioning) within a single integrated structure, achieving quick adjustments without excessive complexity
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
Enables efficient, repeatable, and reliable cord length adjustments, optimizing the performance of mechanized arrow rests by securely maintaining the desired length without slipping, improving the overall operation of the archery bow system.
Implementation Method 1
The cord tension, when applied according to geometric features of the device, generates mechanical leverage against the cord to secure the device in place
Implementation Method 2
The cord tension, when applied according to geometric features of the device, generates mechanical leverage against the cord to secure the device in place, integral to the cord itself
Data Source
AI summary
An arrow rest cord length and lock adjustment device is disclosed. An example device includes a body having a plate section between a first end portion and a second end portion. A plurality of openings are formed in the body. A cord is threaded through the openings so that when the cord is under tension and fixed at one end of the body, one of the openings applies an orthogonal torquing force about an axis of another of the openings which in turn imparts a binding effect on the cord. At least one detent is provided on the body. An o-ring is received in the at least one detent and provided over a portion of the cord and a portion of a perimeter of the body to bring the cord closer to the plate section of the body.