Rail-Type Out-The-Front Knife Sliding Block Design
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Solution Overview
Problem
Out-the-front folding knives experience knife edge looseness due to friction between the knife edge and the handle, leading to instability and wear, with no effective maintenance method available.
Innovation Solution
A rail-type out-the-front folding knife design replaces the traditional sliding fit with a sliding block and rail system, reducing friction and allowing for quick replacement of worn components, along with a power-accumulating ejection mechanism and limiting mechanisms for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional sliding fit between knife edge and knife handle is used, then the structure is simple, but the knife edge becomes loose and unstable due to friction wear over time
Solution Approach 1:
The knife handle is divided into modular components: a reusable handle body and replaceable sliding blocks. The sliding block separates the knife edge connection from the handle structure, allowing the sliding block to be replaced when worn while retaining the handle body. This segmentation resolves the contradiction by enabling maintenance without replacing the entire knife.
Solution Approach 2:
The sliding block acts as an intermediary component between the knife edge and the handle's sliding groove. It transfers the sliding motion while protecting the knife edge from direct contact and wear with the handle. The sliding block can be easily replaced when worn, maintaining knife edge stability without complicating the overall structure.
2Ease of manufacture
If friction between knife edge and knife handle groove is allowed, then the structure is simple, but irreparable wear occurs leading to knife edge looseness
Solution Approach 1:
The sliding block is designed as a consumable component that can be discarded when worn and replaced with a new one. The handle body and sliding groove are recovered and reused. This approach maintains simple manufacturing while extending the overall knife service life through component replacement rather than discarding the entire knife.
Solution Approach 2:
The sliding block is designed as a low-cost, easily replaceable component that absorbs the wear and friction. While the sliding block has a limited service life and needs replacement, this extends the life of the more expensive knife handle and blade components, providing an economical solution to the wear problem.
3Device complexity
If only front and rear sliding grooves are designed in the knife handle, then the structure is simple, but the knife edge becomes loose after prolonged use
Solution Approach 1:
The sliding block is designed to be dynamically replaceable while maintaining a static, simple handle structure with fixed sliding grooves. The simplicity of the handle structure is preserved, but reliability is improved through the ability to dynamically replace the worn sliding block component rather than the entire handle assembly.
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 rail-type design enhances the stability and durability of the knife by minimizing friction and enabling easy maintenance, ensuring the knife edge remains secure and functional over time.
Implementation Method 1
a tension spring connected to the front and rear bent hooks; the front bent hook and the rear bent hook extend downward beyond the long strip plate and drive the sliding block
Implementation Method 2
the sliding block is located in the cavity and is slidably connected to the sliding rail; The sliding block and the rail as components can be replaced and renewed quickly after being worn
Data Source
AI summary
The present disclosure is in the technical field of folding knives, and particularly relates to a rail-type out-the-front folding knife and a using method thereof. In the present disclosure, the sliding fit between the sliding block and the professional sliding parts of the rail replaces the traditional sliding fit between the knife edge and the knife handle to avoid the friction between the knife edge and the knife handle, making the knife more stable and durable. The sliding block and the rail as components can be replaced and renewed quickly after being worn, making the maintenance more convenient.