Out of Front Knife Assisted Opening Mechanism
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Solution Overview
Problem
Conventional out-of-front knives with spring mechanisms can accidentally extend and cause injuries due to improper locking, leading to regulatory restrictions in some countries.
Innovation Solution
An out-of-front knife with an assisted opening mechanism featuring two sliders and springs, requiring a preset distance and resistance to be overcome before the blade extends, ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring mechanism is used to assist blade extension, then the blade can be extended quickly and easily, but the blade may accidentally extend and cause injury due to improper locking
Solution Approach 1:
The extending assembly is pre-loaded in a blocked position where the blade is held retracted. The user must first intentionally disengage the locking mechanism (by pushing the button or sliding the panel), which then allows the pre-loaded spring to automatically extend the blade. This preliminary blocking action prevents accidental extension while maintaining quick deployment capability.
2Object-affected harmful factors
If a locking mechanism is added to prevent accidental extension, then safety is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is merged with the extending assembly components. The button is integrated with the first slider, and the unlock panel is integrated with the second slider. This merging allows the locking and extending functions to be performed through a single integrated mechanism, reducing overall device complexity while maintaining safety.
Solution Approach 2:
The extending assembly serves multiple functions: it acts as both the blade extension mechanism and the locking mechanism. The same spring-loaded sliders that extend the blade also serve as the locking elements that prevent accidental extension. This multi-functionality reduces the need for separate components, simplifying the overall structure.
3Object-affected harmful factors
If the blade is required to move a preset distance and overcome preset resistance, then accidental extension is prevented, but the ease of operation increases difficulty
Solution Approach 1:
The mechanism transitions from a static locked state to a dynamic extended state through controlled movement. The sliders must move a preset distance to disengage the locking position, and the spring provides dynamic force to overcome resistance during extension. This dynamic process ensures intentional deployment while maintaining ease of use through mechanical assistance.
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 assisted opening mechanism prevents accidental blade extension, enhancing safety and compliance with regulations by requiring intentional user action to deploy the blade.
Implementation Method 1
The out of front knife has a handle and a blade that is able to slide directly forward to extend out of the handle. The out of front knife has existed and long been popular among general republic due to its portability and user friendly design. A conventional out of front knife further has a spring mechanism and a locking mechanism. The spring mechanism is connected to the handle and the blade, and is able to pull the blade to assist the blade to extend out of the handle.
Implementation Method 2
With two sliders and two springs of the extending assembly, only when the blade is intentionally pushed to move a preset distance and overcome a preset resistance, one of the springs pulls and assists the blade of the out of front knife to extend out of the handle.
Data Source
AI summary
An out of front knife with an assisted opening mechanism has a handle, a blade mounted in the handle, a thumb stud that drives the blade, and an extending assembly that assists with extending the blade out of the handle. With two sliders and two springs of the extending assembly, only when the blade is intentionally pushed to move a preset distance and overcome a preset resistance, one of the springs pulls and assists the blade of the out of front knife to extend out of the handle. Therefore, the out of front knife with the assisted opening mechanism is used safely.