Mechanical Broadhead with Angled Retractable Blades
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Solution Overview
Problem
Existing mechanical broadheads face issues with blade stress, complexity, and reduced penetration due to extended blades and unnecessary parts, which affect arrow flight and target penetration.
Innovation Solution
A mechanical broadhead design with geometrically angled blades and a unique front tip that allows blades to be fully enclosed during flight, deploying quickly upon impact, using a retaining spring and connecting members for secure deployment, and minimizing stress on blades for improved kinetic energy transfer and penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blades are extended outward during flight to create a larger cutting hole, then the wounding effect is improved, but the arrow flight stability deteriorates due to wind plane interference
Solution Approach 1:
The broadhead employs movable blades that can dynamically change position between retracted (during flight) and extended (during impact) states. This dynamic configuration allows the broadhead to optimize for both flight stability and wounding effect at different stages of the arrow's trajectory.
Solution Approach 2:
The broadhead is divided into a body and multiple independent blades that can move relative to each other. The blades are held in a retracted position within the body during flight, and can be deployed outward upon impact, allowing the cutting function to be separated from the flight function.
2Stability of the object's composition
If blades are held in a retracted position during flight, then arrow flight stability is improved, but the cutting effectiveness deteriorates upon target impact
Solution Approach 1:
The broadhead employs movable blades that can dynamically change position between retracted (during flight) and extended (during impact) states. This dynamic configuration allows the broadhead to optimize for both flight stability and wounding effect at different stages of the arrow's trajectory.
Solution Approach 2:
The blades are pre-positioned in a retracted state within the broadhead body during flight, preparing for rapid deployment upon impact. The mechanical structure is designed so that the blades are ready to be forced outward by the impact force, ensuring immediate cutting effectiveness when needed.
3Reliability
If blades are forced outward upon impact to create a larger cutting hole, then the wounding effect is improved, but the stress on blades increases causing potential cracking
Solution Approach 1:
The broadhead employs movable blades that can dynamically change position between retracted (during flight) and extended (during impact) states. This dynamic configuration allows the broadhead to optimize for both flight stability and wounding effect at different stages of the arrow's trajectory.
Solution Approach 2:
The blades are pre-positioned in a retracted state within the broadhead body during flight, preparing for rapid deployment upon impact. The mechanical structure is designed so that the blades are ready to be forced outward by the impact force, ensuring immediate cutting effectiveness when needed.
4Reliability
If blades extend from front to back of the broadhead, then the cutting hole size is improved, but the arrow penetration capability deteriorates due to reduced inertia
Solution Approach 1:
The broadhead is divided into a body and multiple independent blades that can move relative to each other. The blades are held in a retracted position within the body during flight, and can be deployed outward upon impact, allowing the cutting function to be separated from the flight function.
Solution Approach 2:
The broadhead employs movable blades that can dynamically change position between retracted (during flight) and extended (during impact) states. This dynamic configuration allows the broadhead to optimize for both flight stability and wounding effect at different stages of the arrow's trajectory.
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
The design enhances arrow flight, ensures deeper penetration, and provides a more deadly cut with reduced inertia and stress on blades, while allowing for easy reset without disposable parts.
Implementation Method 1
A retaining spring holds the blades in a retracted position within each of the blade windows
Implementation Method 2
upon contact with a target, the front tip and front body slide rearwardly and apply a force into an end of the geometrically angled blades, causing each of the blades to pivot outwardly
Data Source
AI summary
A mechanical broadhead for attachment to an arrow having a broadhead body including a plurality of blade windows formed therein, a geometrically angled retractable blade attached within each of the blade windows, retaining springs for retaining the blades in a retracted position during flight, a front body slidably mounted onto the broadhead body, and a front tip secured to the front body. Upon contact with a target, the front tip and front body slide rearwardly into an end of the geometrically angled blades, thus pushing each of the blades through the blade windows into a deployed position. The blades of the broadhead are reset by inserting a sharp point underneath an end portion of the retaining springs and applying a slight twisting motion allowing the blades to retract back into the broadhead body into a loaded position.