Folding Knife Disengageable Assisted-Opening Mechanism
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Solution Overview
Problem
Folding knives with assisted-opening mechanisms lack a disengageable option, which can be uncomfortable for users unfamiliar with the mechanism and may not comply with local regulations, and the assist spring remains tensioned when not in use, potentially reducing its lifespan.
Innovation Solution
Incorporating an engagement mechanism that allows the assisted-opening mechanism to be switched between engaged and disengaged positions, enabling users to operate the knife manually or with assistance, and disabling the assist spring tension when not in use to preserve its strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an assisted-opening mechanism is incorporated into a folding knife, then the ease of opening the blade is improved, but the device complexity increases and compliance with certain regulations becomes difficult
Solution Approach 1:
The patent implements a disengageable assisted-opening mechanism that allows the knife to dynamically switch between assisted-opening mode and manual mode. The engagement mechanism can be activated or deactivated by the user, enabling the knife to adapt its opening characteristics based on user preference or regulatory requirements, thus resolving the contradiction between ease of operation and device complexity.
2Ease of operation
If the assisted-opening mechanism is always engaged, then the ease of opening is improved, but the assist spring remains in prolonged tension reducing its lifespan
Solution Approach 1:
The disengageable mechanism allows the assist spring to alternate between tensioned (assisted mode) and relaxed (manual mode) states. By periodically disengaging the mechanism when assisted-opening is not needed, the spring is allowed to rest, reducing cumulative stress and extending its operational lifespan while maintaining ease of opening when required.
3Adaptability or versatility
If the assisted-opening mechanism is made disengageable, then the adaptability to different regulations and user preferences is improved, but the device complexity increases
Solution Approach 1:
The engagement mechanism serves multiple functions: it engages/disengages the assisted-opening mechanism, provides a user interface for mode selection, and potentially serves as a regulatory compliance feature. This multi-functionality approach allows the knife to adapt to different regulations and user preferences while minimizing the addition of separate components, thus balancing adaptability with controlled complexity.
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
Enables users to operate the knife comfortably in both manual and assisted modes, complies with regulatory requirements, and extends the lifespan of the assist spring by reducing prolonged tension.
Implementation Method 1
a bias member configured to move the blade toward the open position when the blade is manually rotated from the closed position to beyond an equilibrium or threshold point
Implementation Method 2
the biasing member is generally configured to apply a reverse bias to the blade, tending to hold the blade in the closed position
Data Source
AI summary
A knife includes a handle and a blade coupled to the handle so as to be movable between an open position in which the blade extends from the handle, and a closed position, in which the blade is received within the handle. An assisted opening mechanism is operatively coupled between the blade and the handle, and is configured to provide an opening-assist to the blade. An engagement mechanism is also provided, which is switchable between an engaged condition, in which the assisted opening mechanism is enabled, and a disengaged condition, in which the assisted opening mechanism is disabled such that it does not provide an opening assist to the blade.