Crossbow Lower Floating Rail for Consistent Shot Placement
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Solution Overview
Problem
Crossbows experience variations in arrow flight due to inconsistent hand positioning and support, leading to noticeable errors in shot placement, especially with increasing arrow speeds and distances, affecting users of varying body sizes and arm spans.
Innovation Solution
A crossbow assembly featuring a riser with flexible limbs, a bowstring release mechanism, and an elongated frame member with a support rail that allows for consistent arrow placement by minimizing variations in hand positioning and support, using a Picatinny rail for accessory mounting, enabling secure attachment of fore-grips and bi-pods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If crossbow arrow speed and range are increased, then crossbow effectiveness is improved, but variations in hand positioning and support have a greater effect on arrow flight, worsening shot placement consistency
Solution Approach 1:
A support rail extending below the crossbow stock serves as an intermediary element between the user's supporting hand and the crossbow. This rail provides a dedicated, consistent contact point that mediates the interaction, ensuring that variations in hand positioning do not translate to variations in crossbow support. The rail acts as a stable interface that maintains consistent arrow flight conditions even when arrow speed and range are increased.
2Adaptability or versatility
If users of varying body sizes and arm spans use the crossbow, then user accessibility is improved, but hand positioning consistency deteriorates, leading to errors in shot placement
Solution Approach 1:
The support rail serves as a universal intermediary that accommodates users of different body sizes and arm spans. By providing a fixed, standardized support interface below the stock, the rail allows each user to find their own comfortable gripping position on the stock while the rail ensures consistent support point contact. This decouples user anthropometric variations from support consistency, maintaining shot placement precision across diverse user populations.
3Ease of operation
If the crossbow stock is grasped at different points by users with different body builds, then ease of operation is improved for individual users, but arrow flight consistency deteriorates
Solution Approach 1:
The support rail acts as a mediator that separates the gripping function from the supporting function. Users can grasp the stock at different points according to their comfort and body dimensions, while the rail provides a consistent, fixed support point below the stock. This intermediary structure ensures that variations in grip position do not affect the stability of the crossbow during firing, maintaining arrow flight consistency while preserving individual user comfort.
Data Source
AI summary
A crossbow has a riser, flexible limbs, a bowstring extending between the tips of the limbs for propelling an arrow, and an elongated frame extending from the riser. A bowstring release proximate the rear end of the elongated frame includes a trigger for releasing the bowstring, and firing an arrow. A first grip is disposed proximate to the trigger for being grasped by the user's first hand. A “Picatinny” type support rail extends along and below the elongated frame, secured at its rearmost end to the elongated frame, but otherwise spaced therefrom. The support rail can receive fore-grips, a bi-pod, or can be rested against a support surface to help steady the crossbow during firing.