Archery Bow Cable Guard Roller Arrangement
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Solution Overview
Problem
Existing archery bow cable guards induce additional torque and frictional forces due to the side-by-side arrangement of rollers, which negatively impact the performance of compound archery bows by reducing arrow speed.
Innovation Solution
The archery bow cable guard features first and second cable rollers with axes of rotation perpendicular to the cable portions, laterally offset from each other and the bowstring plane, minimizing friction by allowing the cables to move in a lateral direction relative to the bowstring, thus reducing interference with the arrow's flight path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rollers are arranged side-by-side in a traditional cable guard, then the cable can be guided out of the arrow path, but additional torque and frictional forces are induced on the cable
Solution Approach 1:
The patent repositions the rollers from a side-by-side arrangement to an end-to-end arrangement along the cable's length. This dimensional reconfiguration changes the contact geometry from lateral friction to longitudinal guidance, eliminating the torque-inducing lateral forces while maintaining cable deflection functionality.
Solution Approach 2:
Instead of arranging rollers side-by-side perpendicular to the cable path (traditional approach), the patent inverts the arrangement to place rollers end-to-end parallel to the cable's length. This inversion transforms the friction mechanism from harmful lateral contact to beneficial longitudinal guidance.
2Object-affected harmful factors
If a cable slide is used with rod-type cable guards, then the cable can be deflected out of the arrow path, but frictional contact reduces the bowstring launch speed
Solution Approach 1:
The patent extracts the cable from direct frictional contact with the cable guard structure by introducing rollers as intermediary elements. The rollers bear the friction load while allowing the cable to slide smoothly, separating the deflection function from the friction-generating contact.
Solution Approach 2:
The rollers serve as intermediary elements between the cable and the cable guard structure. These rollers reduce direct frictional contact by providing a rolling interface, thereby minimizing energy loss while maintaining effective cable deflection out of the arrow path.
3Ease of operation
If rollers are positioned coaxially side-by-side, then cable guidance is achieved, but additional torque is imposed on the cable
Solution Approach 1:
The patent relocates the rollers from a side-by-side configuration (perpendicular to cable length) to an end-to-end configuration (parallel to cable length). This dimensional change aligns the roller contact forces with the cable's longitudinal axis, eliminating the perpendicular torque component while preserving guidance functionality.
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
This configuration reduces frictional forces and maintains arrow speed by positioning the cables out of the arrow's flight path without imposing additional torque, enhancing the performance of the archery bow.
Implementation Method 1
Rollers have been used to further reduce such frictional forces. The rollers may be part of a guide or guard assembly that is mounted to the rod.
Implementation Method 2
the frictional contact of the cables with the rod or cable slide reduced the speed by which the bowstring launches the arrow
Data Source
AI summary
An archery bow cable guard includes a base portion and first and second cable rollers. The base portion is configured to mount to a riser of an archery bow. The first and second cable rollers are mounted to the base portion and arranged to contact a cable of the archery bow. Each roller has an axis of rotation that is arranged perpendicular to a length dimension of the cable. The axis of rotation of the first and second cable rollers are spaced apart in a direction parallel to a longitudinal dimension of the archery bow cable guard.