Compound Bow Cam Cable Anti-Vibration Bar
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Solution Overview
Problem
Conventional compound bows experience vibration transmission to the handle during arrow shooting, which degrades accuracy due to inadequate damping of vibrations from the bowstring and cam cables.
Innovation Solution
The compound bow incorporates a bowstring support bar and cam cable anti-vibration bars, featuring a pivot lever and anti-vibration members made of rubber, to directly contact and dampen the bowstring and cam cables, respectively, when they return to their original positions, thereby reducing handle vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a bowstring support bar with contact rubber is provided to support the bowstring, then vibrations of the bowstring are dampened to some extent, but vibrations transmitted to the handle cannot be removed satisfactorily
Solution Approach 1:
The patent introduces cam cable anti-vibration bars as intermediary elements that contact the cam cables to dampen vibrations before they reach the handle. These anti-vibration bars with rubber contact surfaces act as mediators between the cam cables and the handle, absorbing vibrational energy and preventing its transmission to the handle, thereby improving arrow accuracy.
2Reliability
If conventional vibration damping measures are used, then some bowstring vibrations are attenuated, but the device complexity remains low with simple structures
Solution Approach 1:
The patent segments the vibration damping function into separate components: a bowstring support bar for dampening bowstring vibrations and cam cable anti-vibration bars for dampening cam cable vibrations. Each component is a simple, independent structure with specific damping functions, allowing the system to achieve comprehensive vibration control without excessive overall complexity.
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 significantly improves arrow accuracy by effectively damping vibrations generated from both the bowstring and cam cables, enhancing the overall vibration damping performance beyond previous solutions.
Implementation Method 1
an anti-vibration member that is coupled to the rear end of the coupling bar and whose rear surface contacts one of the first and second cam cables
Implementation Method 2
anti-vibration members made of rubber, to directly contact and dampen the bowstring and cam cables
Data Source
AI summary
A compound bow has an improved vibration damping function. The compound bow includes a bow main body including a handle and a pair of limbs; upper and lower pulley assemblies each including a pulley and a cam; a bowstring; first and second cam cables that are wound around the cam of each of the upper and lower pulley assemblies as the bowstring is pulled; a bowstring support bar whose one end is coupled to the handle and whose other end is coupled to a cushioning member that contacts the bowstring; and a first cam cable anti-vibration bar including a coupling bar coupled to the handle, and an anti-vibration member that is coupled to the rear end of the coupling bar and whose rear surface contacts one of the first and second cam cables when the bowstring is released to thus return to an original position.