Arrow Rest Rotation Mechanism for Momentum-Based Energy Transfer
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Solution Overview
Problem
Existing archery equipment lacks efficient mechanisms to store and transfer energy effectively, leading to suboptimal projectile speed and kinetic energy upon impact.
Innovation Solution
Incorporation of rotatable members into archery bows that store energy through rotation, allowing for the conversion of potential energy into kinetic energy without manual actuation, using biasing elements and angular momentum to facilitate energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional archery equipment is used without momentum-activated rotatable members, then the device complexity is low, but the energy transfer efficiency and projectile speed are suboptimal
Solution Approach 1:
The rotatable member is rotated in advance during the drawing phase to pre-load the biasing element, storing potential energy before release. This preliminary action allows the system to accumulate energy that will be automatically transferred to the projectile upon release without requiring additional manual actuation during the critical launch moment
Solution Approach 2:
The momentum-activated rotation mechanism uses the natural momentum of the drawn bow to automatically rotate the member and trigger energy release. The system serves itself by using the drawing motion to both charge the biasing element and activate its release, eliminating the need for separate triggering mechanisms or manual intervention
2Speed
If momentum-activated rotatable members are incorporated into archery equipment, then projectile speed and kinetic energy transfer are enhanced, but the device complexity increases
Solution Approach 1:
The system transitions from a static arrow rest to a dynamic momentum-activated mechanism where the rotatable member automatically changes position based on the momentum of the drawn bow. This dynamic behavior enables the system to adapt its energy transfer timing to the specific drawing force and speed, optimizing projectile launch conditions
Solution Approach 2:
The biasing element's torque characteristics change as the rotatable member rotates through different orientations. By varying the angular position and rotational speed parameters, the system optimizes the energy transfer profile to maximize projectile speed while controlling the complexity through predictable parametric changes
3Reliability
If biasing elements are used to bias the member to remain in specific orientations, then energy storage and release control are improved, but the device complexity increases
Solution Approach 1:
The biasing element creates a torque feedback mechanism that automatically returns the rotatable member to its stable oriented position after energy release. This passive feedback control ensures reliable energy storage and release cycling without requiring active control systems, maintaining reliability while limiting complexity growth
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
Enhances projectile speed and kinetic energy transfer by automatically releasing stored energy when momentum thresholds are met, improving performance and user experience.
Implementation Method 1
The biasing element is at least partially disposed within the internal volume. The member is coupled to the biasing element and rotatable about an axis of rotation. The biasing element applies a first torque on the member which biases the member to remain in the second orientation.
Implementation Method 2
The second torque can generate an angular momentum sufficient to overcome the first torque to rotate the member in the second direction from the third orientation, past the second orientation, to the first orientation.
Data Source
AI summary
An arrow rest for an archery bow can include a housing, a biasing element, and a member or wheel that rotates between states, configurations, or orientations. The member can be rotated from a first orientation to a second orientation when the archery bow is at least partially drawn. While the member is in the second orientation, the biasing element can apply a torque retaining the member in the second orientation. The member can be rotated to a third orientation and released to generate momentum. A relatively large momentum of the member causes the member to rotate from the third orientation, past the second orientation, to the first orientation. A relatively small momentum of the member can cause the member to rotate from the third orientation to the second orientation.