Monolithic Knife Lock Mechanism Resolving Blade Play
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Solution Overview
Problem
Folding knives with traditional lock and release mechanisms often lack a robust and efficient way to transition between closed and open positions, leading to potential instability and user inconvenience.
Innovation Solution
A monolithic lock and release mechanism featuring a base portion and a resilient portion, where the resilient portion is movable between a static and depressed position relative to the base, allowing the blade assembly to pivot smoothly between closed and open positions, with a detent engaging with the blade assembly to secure it in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional lock and release mechanism is used in folding knives, then the structure is simpler to manufacture, but the transition between closed and open positions is less stable and efficient
Solution Approach 1:
The patent combines the lock and release functions into a single integrated mechanism. The lock member includes both the locking surface for securing the blade and the release surface for opening, eliminating the need for separate lock and release components. This merging maintains structural simplicity while improving stability during position transitions.
Solution Approach 2:
The lock member is designed with movable surfaces that dynamically adapt during blade deployment. The locking surface engages with the blade holder to secure the open position, while the release surface allows controlled disengagement. This dynamic design ensures stable transitions between closed and open positions without requiring complex mechanisms.
2Ease of operation
If a monolithic lock and release mechanism is implemented, then the blade assembly transitions smoothly between positions with minimal play, but the manufacturing precision requirements increase
Solution Approach 1:
While the lock and release mechanism is monolithic, the patent segments the interaction surfaces into distinct functional zones: a locking surface for securing the blade in the open position and a release surface for controlled opening. This segmentation of functional surfaces within the monolithic structure allows for optimized manufacturing tolerances in each zone, ensuring smooth transitions without requiring excessive overall precision.
Solution Approach 2:
The monolithic lock member features locally optimized surfaces with specific geometric properties. The locking surface has enhanced engagement features for stability, while the release surface has modified geometry for smooth disengagement. This local quality differentiation allows the mechanism to achieve smooth blade transitions while maintaining reasonable manufacturing precision requirements.
3Ease of operation
If the resilient portion is made highly flexible for easy movement, then the operation becomes easier, but the locking reliability may be compromised
Solution Approach 1:
The resilient portion is designed with controlled flexibility parameters that allow easy movement during normal operation while maintaining locking reliability. The material properties and geometric dimensions of the resilient portion are optimized to provide sufficient compliance for smooth blade deployment but enough structural integrity to ensure secure locking when engaged. This parameter optimization resolves the contradiction between ease of operation and locking security.
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 solution provides a stable and user-friendly mechanism for easily switching between closed and open positions, minimizing 'play' and ensuring the blade remains securely locked in both states, enhancing the overall usability and reliability of the knife.
Implementation Method 1
a resilient portion extending from the base portion. The resilient portion is movable between a static position and a depressed position relative to the base portion
Implementation Method 2
a detent protruding from the resilient portion and engageable with the depression when the blade assembly is in the closed position
Data Source
AI summary
A knife including a handle having a first scale coupled to a second scale cooperatively defining a pocket and a slot, a blade assembly pivotably coupled to the handle, and a lock and release mechanism. The lock and release mechanism is at least partially disposed in the pocket and is defined by a monolithic element. The lock and release mechanism includes a base portion and a resilient portion extending from the base portion. The base portion is coupled to the handle and the resilient portion is movable between a static position and a depressed position relative to the base portion to vary the blade assembly between a closed position and an opened position.