Magnetic Pivot Arrow Rest for Reduced Torque
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Solution Overview
Problem
Existing arrow rests are complex, heavy, and noisy, leading to system torque that affects accuracy and trajectory, and are prone to damage from brush and limbs due to protruding support arms when not in use.
Innovation Solution
A lightweight, springback enabled, pivot mounted arrow support arm with a magnetically attracted catch that holds the arm close to the bow riser when not in use, eliminating the need for automatic re-cocking mechanisms and reducing fletching contact and system torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional arrow rests with protruding support arms are used, then the arrow can be supported and launched, but the support arms are prone to damage from brush and limbs when not in use
Solution Approach 1:
The support arm transitions from a static protruding position to a dynamic retracted position through magnetic attraction. The arm is spring-loaded to extend forward for arrow support, then automatically retracts when not in use due to magnetic force pulling it against the bow riser, eliminating the need for manual operation while protecting against damage.
Solution Approach 2:
The patent replaces complex mechanical re-cocking mechanisms with a magnetic field-based system. Instead of using cams, linkages, or springs to automatically return the support arm to its protective position, a magnet mounted on the bow riser creates a magnetic field that passively attracts and holds the magnetized support arm in the retracted position against the bow.
2Extent of automation
If complex automatic re-cocking mechanisms are used, then the support arm returns to extended position automatically, but the device becomes heavier and more complex
Solution Approach 1:
The patent extracts the essential function of automatic re-cocking from complex mechanical systems and implements it through a simple magnetic field. By removing unnecessary mechanical components (cams, linkages, multiple springs) and retaining only the critical magnetic attraction mechanism, the system achieves automation with minimal complexity.
Solution Approach 2:
Complex mechanical re-cocking systems are replaced with a magnetic field-based passive return mechanism. The magnet mounted on the bow riser creates a magnetic field that automatically pulls the magnetized support arm back to its retracted position without requiring mechanical linkages, reducing both weight and complexity while maintaining full automation.
3Reliability
If complex arrow rests with multiple components are used, then the arrow support function is enhanced, but system torque increases affecting accuracy
Solution Approach 1:
The patent extracts and removes unnecessary heavy components from traditional arrow rests, retaining only the essential support arm and magnet assembly. By eliminating extraneous mechanical parts, the overall weight is reduced, thereby minimizing system torque and its negative impact on shooting accuracy while preserving the core arrow support function.
Solution Approach 2:
The patent changes the physical parameters of the arrow rest system by using lightweight materials and a compact magnetic mounting arrangement. This parameter change reduces the mass and moment of inertia of the rest components, minimizing system torque and improving arrow flight accuracy while maintaining reliable arrow support functionality.
4Extent of automation
If magnets are mounted at the rear of the bow riser, then the support arm returns to extended position, but the arm remains exposed and vulnerable when retracted
Solution Approach 1:
The support arm is designed to dynamically change its position based on operational needs. When an arrow is loaded, the spring force overcomes magnetic attraction and pushes the arm forward to the extended support position. When not in use, the magnetic force pulls the arm back to the retracted protective position against the bow riser, providing automatic protection without sacrificing functionality.
Solution Approach 2:
The magnetic field acts as an intermediary force between the magnet on the bow riser and the magnetized support arm. This magnetic interaction enables the support arm to automatically retract to a protected position against the bow riser while still being able to extend forward when needed, providing both automation and protection without direct mechanical connection.
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 solution simplifies the design, reduces fletching contact, holds the arrow securely, protects the support arm from damage, and minimizes system torque, all while being significantly lighter and more compact than traditional arrow rests.
Implementation Method 1
a magnet mounted on an arrow rest causes a magnetized support arm to be attracted to it
Implementation Method 2
spring-loaded to propel the support arm forward to a position ready to receive another arrow
Data Source
AI summary
An arrow rest for an archers bow that co-acts with a magnetic catch that may hold the arrow on the rest when the bow is drawn back; and that holds a horizontally pivoting arrow support arm, made of magnetically attractive material, that pivots toward and away from the vertical surface of the bow in the sight window area of the bow, in close to the vertical surface of the bows sight window when the pivoting arrow support arm, is in a fully retracted position and not otherwise in use, so as to avoid possible damage from being caught on limbs and brush while being carried by the archer in the field. The magnet part of the arrow rest further helps move the horizontally pivoting arrow support arm out of the way of the arrows fletching as it passes by the rest so that arrow flight is not unduly disrupted as the arrow is leaving the bow. The rest may be constructed in multiple separated parts or co-joined into a single unibody component.