Geared Archery Bow Sight Elevation Adjustment Mechanism
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Solution Overview
Problem
Existing archery bow sights lack a reliable and precise mechanism for adjusting elevation in response to target distance, often requiring trial and error and are not adaptable to various bow sizes or light conditions, and can be affected by debris and interference during use.
Innovation Solution
A geared archery bow sight with a rotatable cylindrical handle and locking knob for precise elevation adjustment, featuring a fiber optic light gathering ring and adjustable mounting bracket to accommodate different bow sizes, with indicia for distance marking and low-friction guide bushings for smooth operation in varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a manual cam member adjustment mechanism is used, then the bow sight can be adjusted for different distances, but the adjustment is imprecise and requires trial and error
Solution Approach 1:
The patent replaces the manual cam member adjustment mechanism with a geared adjustment system. The gear mechanism provides precise incremental adjustments through tooth engagement, eliminating the need for trial and error while maintaining ease of operation through simple rotational input on the adjustment screw.
Solution Approach 2:
The patent introduces an intermediary gear mechanism between the user's adjustment input and the cam member. This intermediary system translates simple rotational motion into precise linear adjustment of the sight, providing both precision and ease of operation through the mechanical advantage of the gear teeth.
2Adaptability or versatility
If the bow sight housing is fixed, then the structure is simple, but it cannot accommodate various bow thickness configurations
Solution Approach 1:
The patent makes the bow sight housing dynamically adjustable rather than fixed. The housing can be repositioned along the bow using an adjustment mechanism that allows the user to accommodate various bow thickness configurations while maintaining a relatively simple overall structure through controlled mobility.
Solution Approach 2:
The patent segments the bow sight system into adjustable components, including a repositionable housing and separate mounting elements. This segmentation allows the housing to be independently adjusted for different bow thicknesses without requiring complete redesign of the entire structure.
3Ease of operation
If a linear track adjustment mechanism is used, then the bow sight can be adjusted linearly, but it is subject to jamming in the presence of particles and debris
Solution Approach 1:
The patent replaces the linear track mechanism with a geared adjustment system. The gear teeth provide positive engagement that is less susceptible to jamming by particles and debris compared to linear tracks, while maintaining smooth linear adjustment through the mechanical advantage of the gear-cam interaction.
Solution Approach 2:
The patent uses a cam member with curved surfaces instead of linear tracks for the adjustment mechanism. The curved cam surfaces are more resistant to jamming by particles and debris, while still providing smooth linear adjustment through the cam's geometric profile.
4Weight of moving object
If the bow sight is made compact and lightweight, then it is easier to handle and less interference, but the construction must remain rugged
Solution Approach 1:
The patent uses composite construction materials that combine lightweight properties with structural strength. The housing and mounting components are made from materials that provide adequate strength for rugged use while minimizing weight, achieving both compactness and durability through material selection rather than increased mass.
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 provides a rugged, compact, and reliable bow sight that allows precise elevation adjustment, improved visibility in low light, and adaptability to different bow sizes, ensuring accurate targeting without interference during use.
Implementation Method 1
a fiber optic light gathering ring extending about the outer periphery of the cylindrical bow sight housing, wherein the light gathering ring is in optical communication with the fiber optic bow sight centered within the cylindrical bow sight housing
Data Source
AI summary
Rotation of the cylindrical handle rotates the geared sprocket which biases the linear slide member, which selectively raises and lowers the cylindrical bow sight housing. A locking knob releasably secures the cylindrical handle during rough handling. The cylindrical bow sight includes a circular ring on the front face of the circular bow sight housing, and a bubble level provides a level indication. A fiber optic sight is centered in the bow sight housing in optical communication with a fiber optic band to improve the visibility of the bow sight in low light conditions. A sliding keyway and adjustment screw adjusts the cylindrical bow sight elevation. Indicia on the cylindrical handle provides alignment data responsive to the position of the cylindrical bow sight in relation to the distance to a remote target.