Adjustable Archery Bow Cam System for Wide Draw Length
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Solution Overview
Problem
Archery bows have limited draw length adjustability, making it difficult for short and tall archers to achieve proper fit and accuracy, as existing systems can only adjust within a small range of 25-30 inches.
Innovation Solution
An adjustable cam system with a master/drive cam and slave/driven cam, featuring a control module with multiple mounting locations and a draw length module, allowing for adjustments from 18-31 inches, synchronized through a control cable system to ensure precise draw length settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional cam system is used, then the bow structure is simple, but the draw length adjustability range is limited (25-30 inches)
Solution Approach 1:
The cam system is divided into a master cam and a slave cam, each with independent adjustment capabilities. The master cam includes a control module with multiple mounting locations for different draw length ranges, while the slave cam has a control cable post with corresponding mounting locations. This segmentation allows each cam to be adjusted independently to achieve a broader overall draw length range (18-31 inches) while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The system employs dynamic adjustment mechanisms where the control module on the master cam and control cable post on the slave cam can be repositioned between multiple mounting locations. The control cable dynamically transmits force and motion between the two cams, allowing the system to adapt to different draw length requirements by changing the configuration of movable components rather than requiring a completely different bow structure.
2Adaptability or versatility
If the draw length adjustment range is expanded to 18-31 inches, then more archers can be accommodated, but the cam system complexity increases
Solution Approach 1:
The master cam and slave cam are designed with universal adjustment capabilities through multiple mounting locations on their respective control modules and control cable posts. Each cam can serve multiple draw length ranges by repositioning these components, allowing a single cam system design to universally accommodate archers across a broad draw length spectrum (18-31 inches) without requiring multiple specialized cam systems.
Solution Approach 2:
The control cable acts as an intermediary element that transmits force and synchronizes the motion between the master cam and slave cam. This intermediary mechanism allows the two cams to work together in coordination, enabling the expanded draw length adjustment range while distributing the mechanical complexity across separate components rather than concentrating it in a single complex assembly.
3Measurement precision
If multiple mounting locations are provided on the control module and control cable post, then precise draw length settings are achieved, but the manufacturing complexity increases
Solution Approach 1:
The control module and control cable post are segmented into discrete mounting locations rather than using continuous adjustment mechanisms. This segmentation provides precise, predetermined draw length settings at specific positions, achieving measurement precision through discrete steps while simplifying manufacturing compared to continuous adjustment systems that would require more complex machining tolerances and adjustment mechanisms.
Data Source
AI summary
Aspects of the present disclosure deal with cams and/or cam systems mounted or mountable on an archery bow. In one embodiment, the cam system is a hybrid cam system with a master/drive cam and a slave/driven cam. The cam system is designed to enable large draw length adjustments to fit a variety of archers. To facilitate the draw length adjustment, the master/drive cam includes a control module. The slave/driven cam includes an adjustable control cable post. In one example, the control module and the control cable post may have three different mounting locations, each corresponding to a different draw length range.