Dart Flight With Offset Flexible Blades and Rotational Locking
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Solution Overview
Problem
Conventional darts have limitations in design and stability, particularly with the traditional flight configuration, which may not provide optimal aerodynamics and stability during flight.
Innovation Solution
A new dart design featuring a hollow stem, a dart point, a barrel, a flexible flight part with offset blades, a retainer, and an optional self-lubricating bearing, which together enhance stability and aerodynamics by securing the flight part in place and allowing for rotational locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional planar flight configuration is used, then the dart structure is simple and easy to manufacture, but the aerodynamic stability and flight consistency are insufficient
Solution Approach 1:
The flight is designed with flexible blades that can dynamically adjust their orientation during flight. The blades are connected to the hub in a way that allows them to self-align with the airflow, creating active aerodynamic stabilization rather than relying solely on rigid fixed-geometry structures.
Solution Approach 2:
The flight is divided into multiple independent blades connected to a central hub, allowing each blade to function independently in the airflow. This segmentation enables better aerodynamic performance while maintaining manufacturing simplicity through modular construction.
2Stability of the object's composition
If the flight part is securely attached to prevent rotation, then flight stability improves, but the structural complexity increases due to additional locking mechanisms
Solution Approach 1:
The bearing assembly is designed to automatically lock the flight part in its optimal orientation through self-lubrication and self-centering properties. The system uses the rotational motion itself to achieve stable positioning without requiring external locking mechanisms or complex adjustment devices.
Solution Approach 2:
A bearing acts as an intermediary element between the flight part and the stem, providing a controlled interface that allows for smooth transition to a locked position. The bearing mediates the interaction between the flight blades and the stem, enabling stable attachment while maintaining simplicity.
Data Source
AI summary
A new dart has an integrally formed flight part that is made of thin plastic with a uniform thickness. The flight part has a set of flexible blades that are radially offset, with the width of each blades being coplanar, and extending perpendicular to the longitudinal axis of a stem on which a barrel and dart tip are connected. Edges on a central portion of the flight part engage cooperating surfaces on a retainer, locking the retainer and the flight part against rotation with respect to each other. A self-lubricating bearing fits over the a stem and is used to connect to the flight part and the retainer for rotation with respect to a barrel and dart tip. A channel extends along the length of each blade. A bubble is positioned outwardly of the channel.