Archery Cord Manager Variable Lateral Force
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Solution Overview
Problem
Existing archery bow cable guards generate a constant lateral force that damages and wears out the internal bearing components of rotary cams, causes wobbling, and hinders shooting performance by interfering with the arrow's trajectory.
Innovation Solution
An archery cord manager that includes a body with a cord engager configured to move from an inward to an outward position in response to the bow transitioning from a drawn to an undrawn condition, applying a variable lateral force to the supplemental cord, reducing the sum of lateral forces during the drawn period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable guard is used to provide clearance for the arrow, then the arrow can pass by the power cable without entanglement, but the cable guard generates a lateral force that damages and wears out the internal bearing components of the cams
Solution Approach 1:
The cord manager employs a dynamic cord engagement mechanism that transitions between engaged and disengaged states. The cord engager is positioned to engage the power cable only when necessary (when the arrow is not in the flight path), and disengage when the arrow needs to pass. This dynamic state change allows the system to provide arrow clearance only when needed, eliminating continuous lateral force on the cam bearings while maintaining reliability when required.
Solution Approach 2:
The cord manager operates periodically rather than continuously. The cord engagement is activated during specific phases of the bow cycle (when the arrow is loaded and ready to fire) and deactivated during other phases (when the arrow is not present). This periodic action pattern ensures that the power cable is positioned to protect the arrow during critical moments while avoiding continuous interference with cam rotation, thereby reducing wear and maintaining bearing reliability.
2Reliability
If a cable guard applies lateral force to keep the power cable away from the arrow, then the arrow trajectory is protected, but the cams experience increased wear and wobbling during rotation
Solution Approach 1:
The cord manager uses a dynamic positioning system where the cord engager can move between positions. During the arrow flight phase, the engager is positioned to provide trajectory protection. During the cam rotation phase, the engager repositions to minimize lateral force application. This dynamic repositioning allows the system to maintain both arrow trajectory protection and cam rotation stability at different times in the operational cycle.
Solution Approach 2:
The cord manager anticipates the arrow's flight path and positions the power cable accordingly before the arrow is released. The cord engagement is activated in advance to establish proper clearance, then maintained only for the duration necessary to protect the arrow during its critical initial flight phase. This preliminary and time-limited action protects the trajectory without subjecting the cams to prolonged lateral forces that would cause wobbling and wear.
3Reliability
If the cord engager moves from inward to outward position during the bow transition, then clearance for the arrow is provided, but the duration of lateral forces on the supplemental cord is extended
Solution Approach 1:
The cord manager implements periodic engagement where the cord engager moves to the outward position only during specific intervals when arrow protection is needed. The engagement duration is precisely controlled to match the critical flight phase of the arrow. After this period, the engager returns to the inward position, eliminating lateral forces. This periodic action pattern ensures that while clearance is provided when necessary, the total duration of lateral force application is minimized compared to continuous engagement systems.
Data Source
AI summary
An archery cord manager is described herein. The archery cord manager includes a plurality of ends, a body between the ends, and a cord engager supported by the body. The cord engager is configured to engage a cord of the bow. The cord engager is configured to move between an inward position and an outward position in response to the bow being transitioned between a drawn condition and an undrawn condition. The inward position is located closer to a draw cord plane than the outward position.