Deformable Hollow Dart Head With Air-Vented Impact Absorption
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Solution Overview
Problem
Existing toy darts have limited deformation and fail to effectively reduce impact force on the target, leading to potential damage.
Innovation Solution
A deformable hollow dart head design featuring a dart cap with air vents and a softer material, connected to a circular base and dart body via a connector, allowing for deformation upon impact to increase contact area and reduce impact force through gas discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a cushion made of flexible material is used to reduce impact force, then the impact force reduction is improved, but the deformation capability is limited and the cushion is difficult to deform
Solution Approach 1:
The patent changes the material parameter by using a softer material for the dart cap compared to the circular base, enabling greater deformation capability. The dart cap is specifically designed with material properties that allow it to deform more easily upon impact, thereby improving impact force reduction while maintaining structural integrity through the harder circular base.
2Force
If the dart cap material is made softer to increase deformation, then the impact force reduction is improved, but the structural strength may be compromised
Solution Approach 1:
The patent applies local quality by using different material hardnesses in different parts of the dart head. The dart cap uses softer material localized to the impact area to maximize deformation and impact force reduction, while the circular base uses harder material to maintain overall structural strength and stability. This spatial differentiation of material properties resolves the contradiction between softness for deformation and hardness for strength.
3Force
If a deformable cavity is created by sealing the dart cap, then the deformation space is provided for impact absorption, but the device complexity increases due to additional components
Solution Approach 1:
The patent merges the cushioning function into the dart cap itself by creating an integrally formed deformable cavity within the cap structure. The cap wall forms the cavity boundary, and the cavity is sealed by the cap's own structure rather than requiring separate cushioning components. This integration reduces device complexity while maintaining effective impact force absorption through the deformable cavity.
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 target contact area and reduces impact force by deforming the dart cap, maintaining stability and flight accuracy while reducing production costs and complexity.
Implementation Method 1
the deformable cavity provides deformation space for the dart cap, thereby causing the dart cap to deform and increasing the contact area with the target
Implementation Method 2
due to the deformation of the deformable cavity, the gas therein is discharged through the air vents
Data Source
AI summary
A deformable hollow dart head for a toy dart includes a dart cap and a connector, the dart cap has a cap top and a cylindrical cap wall extending from a periphery of the cap top, the cap wall is provided with air vents, the connector has a circular base connecting with the cap wall, thereby sealing the dart cap to form a deformable cavity, the material of the dart cap is softer than that of the circular base. At the moment when the dart toy hits a target, the dart cap contacts and impacts the target. The target exerts a reactive force on the dart toy, and the deformable cavity provides deformation space for the dart cap, thereby causing the dart cap to deform and increasing the contact area with the target.