Assisted Opening Knife Blade with Multi-Directional Projections
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Solution Overview
Problem
Current tactical knives with rapid deployment blades lack consistency in opening the knife blade when withdrawn from a pocket, due to limited directional snag catchability, which affects the successful automatic deployment of the blade.
Innovation Solution
The assisted opening knife blade features multiple fin-like projections extending from the spine near the pivoting pin aperture, enhancing directional snag catchability by engaging the pocket lining and allowing the blade to pivot open as the knife is withdrawn, utilizing either standard bushings or ball bearings for pivoting and incorporating a locking mechanism for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single projection is used for blade deployment, then the structure is simple, but the directional snag catchability is limited
Solution Approach 1:
The single projection is divided into multiple fin-like projections (first, second, and third projections) extending from different locations on the blade. This segmentation increases directional snag catchability by providing multiple contact points with the pocket lining, thereby improving blade deployment consistency while maintaining structural simplicity through integration with the blade body.
Solution Approach 2:
The projections extend in multiple directions and planes from the blade surface rather than a single direction. The first projection extends from the spine, the second from the side, and the third from the opposite side, creating three-dimensional snag engagement that significantly improves catchability across various withdrawal orientations.
2Reliability
If multiple fin-like projections are added to enhance snag catchability, then automatic deployment success rate improves, but manufacturing complexity increases
Solution Approach 1:
The multiple fin-like projections are merged into a single integrated blade structure rather than being separate components. This combining approach allows the projections to be formed simultaneously with the blade during manufacturing processes such as stamping or forging, thereby improving automatic deployment success rate while avoiding the increased complexity of assembling multiple separate parts.
3Speed
If the blade is designed for rapid deployment, then opening speed increases, but consistency in opening from various orientations decreases
Solution Approach 1:
The fin-like projections are strategically positioned asymmetrically on the blade, with the first projection extending from the spine toward the tip, the second from the side, and the third from the opposite side. This asymmetric arrangement creates optimal snag engagement from multiple withdrawal orientations while maintaining rapid deployment speed through the spring-assisted mechanism.
Solution Approach 2:
The blade projections automatically engage with the pocket lining during withdrawal motion, triggering the spring mechanism to rapidly deploy the blade without requiring manual intervention. This self-service mechanism ensures consistent opening from various orientations while maintaining high speed through the stored elastic energy in the spring.
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
This design achieves the fastest deployment speeds and highest successful catchability rate for automatic blade deployment, ensuring the knife opens consistently and safely, even when withdrawn from various orientations within a pocket or pouch.
Implementation Method 1
As the user begins opening the blade with a thumb stud or flipper lever, the blade pivots to a point at which the spring or torsion mechanism engages the knife blade and pivots the blade toward the open position.
Data Source
AI summary
An assisted opening knife blade having a knife blade and at least two blade projections extending from the knife blade, wherein a proximal end of each blade projection extends beyond a side surface of the knife blade.