Toy Projectile Composite Tip and Foam Body Design
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Solution Overview
Problem
Conventional foam projectile toys face a trade-off between safety and achieving desired flight characteristics such as distance, accuracy, and precision, as softness required for safety can hinder performance.
Innovation Solution
The use of expanded beaded materials, particularly expanded beaded polyolefin, for the body of the projectile, combined with a denser tip, to enhance flight characteristics by improving rigidity and reducing mass while maintaining safety standards through a controlled kinetic energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If soft foam materials are used to meet safety standards, then safety is improved, but flight characteristics such as distance, accuracy, and precision deteriorate
Solution Approach 1:
The projectile uses a composite structure combining a soft foam body (for safety) with a dense tip material (for flight performance). The body is made from soft foam material that meets safety standards, while the tip is made from a denser material that provides the necessary rigidity and aerodynamic properties for accurate and distant flight.
Solution Approach 2:
Different parts of the projectile have different material properties optimized for their specific functions. The body portion uses soft material for safety, while the tip portion uses dense material for flight characteristics. This local differentiation of material quality allows simultaneous achievement of safety and performance requirements.
2Manufacturing precision
If dense materials are used to improve flight characteristics, then accuracy and velocity are improved, but safety deteriorates
Solution Approach 1:
The projectile uses a composite structure combining a soft foam body (for safety) with a dense tip material (for flight performance). The body is made from soft foam material that meets safety standards, while the tip is made from a denser material that provides the necessary rigidity and aerodynamic properties for accurate and distant flight.
Solution Approach 2:
Different parts of the projectile have different material properties optimized for their specific functions. The body portion uses soft material for safety, while the tip portion uses dense material for flight characteristics. This local differentiation of material quality allows simultaneous achievement of safety and performance requirements.
3Speed
If the projectile body is made lighter to increase velocity, then speed is improved, but structural rigidity deteriorates
Solution Approach 1:
The projectile uses a composite structure combining a soft foam body (for safety) with a dense tip material (for flight performance). The body is made from soft foam material that meets safety standards, while the tip is made from a denser material that provides the necessary rigidity and aerodynamic properties for accurate and distant flight.
Solution Approach 2:
The projectile is divided into distinct segments with different material properties: a lightweight foam body for low mass and high velocity, and a dense tip for rigidity and aerodynamic stability. This segmentation allows each part to contribute its optimal properties to the overall performance.
Data Source
AI summary
In accordance with embodiments a projectile can have a body and a tip attached to the body, the body including a nub portion extending from a second end of the body and optionally one or more fins surrounding a circumference of the body at the second end.