Archery Bow String Stop With Angled Flexion Member
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Solution Overview
Problem
Existing archery bow string stop designs lack innovation, particularly in providing effective damping and consistent rebound characteristics, which can lead to suboptimal performance and user experience.
Innovation Solution
A string stop design featuring a first body member supported by the archery bow, with a flexion member and a bumper, where at least a portion of the flexion member is oriented nonparallel to the shooting axis, utilizing composite materials like glass fibers, and attached via a moment connection, to absorb and redirect forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid structural component is used in the string stop, then structural strength is improved, but damping performance deteriorates
Solution Approach 1:
The patent changes the physical state and mechanical properties of the material by using a viscoelastic polymer that exhibits both rigid and damping characteristics. By selecting a material with specific loss modulus and storage modulus values, the design achieves simultaneous structural strength and energy absorption capabilities that rigid materials alone cannot provide.
Solution Approach 2:
The string stop employs a composite construction combining a viscoelastic polymer material that integrates both structural support and damping functions. This composite approach allows the single component to deliver both the strength of rigid structures and the energy absorption of flexible materials, resolving the contradiction between structural integrity and damping performance.
2Device complexity
If the flexion member is oriented parallel to the shooting axis, then structural simplicity is improved, but force absorption effectiveness deteriorates
Solution Approach 1:
The patent orients the flexion member at an angle non-parallel to the shooting axis, introducing a dimensional change in the force absorption geometry. This angular orientation allows the flexion member to effectively absorb forces in multiple directions, including lateral forces from cable interaction, thereby improving force absorption effectiveness without significantly increasing structural complexity.
3Ease of manufacture
If a single material is used for the string stop, then manufacturing simplicity is improved, but performance versatility deteriorates
Solution Approach 1:
The string stop utilizes a composite material system combining viscoelastic polymer with other materials to achieve multiple performance functions including damping, structural support, and force absorption. This composite approach enables a single integrated component to deliver versatile performance characteristics that would require multiple separate components if made from single materials.
Solution Approach 2:
The patent applies different material properties to different regions or aspects of the string stop design. The viscoelastic polymer provides localized damping properties where needed, while maintaining structural integrity in other areas, allowing the design to achieve performance versatility through spatial variation of material qualities rather than using entirely different materials throughout.
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 design enhances damping and ensures consistent bowstring rebound, improving the overall performance and user experience by providing better force absorption and directional control post-arrow launch.
Implementation Method 1
A flexion member is supported by the first body member and a bumper is supported by the flexion member. At least a portion of the flexion member is oriented nonparallel to a longitudinal axis of the string stop.
Implementation Method 2
the composite material comprises glass fibers
Data Source
AI summary
In some embodiments, an archery bow comprises a riser, limbs and a bowstring extending between the limbs. A string stop is supported by the riser. The string stop comprises a first body member, a flexion member supported by the first body member and a bumper supported by the flexion member. At least a portion of the flexion member is oriented nonparallel to a shooting axis defined by the archery bow.