Dual-Arm Arrow Rest for Secure Capture and Clean Release
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Solution Overview
Problem
Conventional arrow rests often fail to securely hold arrows during loading and drawing, leading to potential slippage and noise, and may not accommodate a wide range of arrow lengths, limiting performance and safety.
Innovation Solution
An arrow rest with two configurations: an encapturing configuration that securely holds the arrow shaft through a rotating aperture, and a discharge configuration that allows the arrow to fly without contact, accommodating various arrow lengths by positioning behind the bow's shelf, and utilizing a crank arm mechanism for smooth transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional arrow rests are used to hold arrows during loading and drawing, then the arrow rest structure is simple, but the arrow may slip or make noise due to insufficient secure holding
Solution Approach 1:
The patent employs a dynamic aperture mechanism that rotates between open and closed positions. The aperture, formed by two arms that can rotate relative to each other, dynamically adjusts its state: open during arrow insertion for ease of loading, and closed during drawing to securely encapture the arrow shaft. This dynamic transformation allows the system to achieve reliable arrow holding without requiring an overly complex fixed structure.
Solution Approach 2:
The arrow rest is divided into two separate arms that can rotate independently or in coordination. This segmentation allows each arm to be controlled separately, enabling the aperture to open for loading and close for secure holding. The segmented structure also facilitates the crank arm mechanism that drives the rotation, achieving reliable arrow capture through coordinated movement of multiple simpler components.
2Adaptability or versatility
If conventional arrow rests are used, then the device is simple, but it cannot accommodate a wide range of arrow lengths, limiting versatility
Solution Approach 1:
The rotating aperture mechanism dynamically adjusts its state based on the arrow length. For shorter arrows, the aperture can remain in an intermediate position, while for longer arrows, it rotates to the fully closed position to prevent contact with the bow hand. This dynamic adaptation allows a single device structure to handle multiple arrow lengths effectively.
Solution Approach 2:
The aperture mechanism serves multiple functions: it acts as an arrow guide during loading, a secure holder during drawing, and a protective barrier during release. By positioning the aperture behind the bow's shelf and enabling it to rotate to different positions, the same structure accommodates various arrow lengths without requiring multiple specialized devices.
3Reliability
If the arrow rest is positioned to securely hold the arrow, then arrow stability is improved, but the arrow may contact the bow hand during release, creating safety issues
Solution Approach 1:
The aperture rotates dynamically during the shooting sequence. It starts in a closed position to securely hold the arrow during loading and drawing, then rotates to an open position during release to allow the arrow to depart without contact. This timing-critical dynamic movement resolves the contradiction between stable holding and safe release.
Solution Approach 2:
The aperture is pre-positioned behind the bow's shelf in the closed configuration before shooting. This preliminary positioning ensures the arrow is securely held and properly aligned before the release action occurs. The crank arm mechanism is also pre-configured to rotate the aperture to the open position at the appropriate moment, preventing harmful contact before it can occur.
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
Enhances arrow stability during loading and drawing, reduces noise, supports a broader range of arrow lengths, and improves shooting accuracy and safety by preventing slippage and contact with the bow hand.
Implementation Method 1
a spring (e.g., a torsion spring) that is biased to rotate the arms from the encapturing configuration to the discharge configuration
Implementation Method 2
a cam that is rotatably coupled to the shaft and that rotates in response to rotation of the shaft. The cam may comprise a barrel and a rotor
Data Source
AI summary
An arrow rest is moveable between an encapturing configuration and a discharge configuration. The arrow rest comprises a body, a first arm, and a second arm. The first arm is movably mounted with respect to the body. The second arm is also movably mounted with respect to the body. Responsive to movement from the encapturing configuration to the discharge configuration a first portion of the first arm and a first portion of the second arm operate to move away from each other, while a second portion of the first arm and a second portion of the second arm operate to move toward each other.