Folding Knife Blade Tension Adjustment Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing folding knives require disassembly of the outer shell to adjust blade tension, are prone to jamming and loosening due to complex locking mechanisms and numerous parts, and have instability in unlocking/locking operations.
Innovation Solution
A tool structure with a blade tension adjustment mechanism that allows tension adjustment without disassembling the shell, utilizing a sleeve, lock lever, cover plate, and adjusting screw, which simplifies the structure, improves reliability, and maintains locking stability during tension adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the outer shell is removed to adjust blade tension, then the blade tension can be adjusted, but the adjustment process becomes inconvenient and complex
Solution Approach 1:
The adjustment mechanism is segmented into independent functional components: the adjusting screw (60) for tension control, the cover plate (50) for protection and access, and the sleeve (30) for structural support. This segmentation allows the adjusting screw to be accessible and operable without removing the entire outer shell, resolving the contradiction between adjustment convenience and structural integrity.
Solution Approach 2:
The cover plate (50) acts as an intermediary component that provides protected access to the adjusting screw (60). It can be removed or opened to allow adjustment, then replaced to protect the mechanism, serving as a mediator between the need for convenient adjustment and the need to maintain shell integrity.
2Reliability
If a complex locking mechanism with numerous parts is used, then the locking function can be achieved, but the risk of jamming and loosening increases
Solution Approach 1:
The locking function is merged with the blade deployment mechanism itself. The blade's movement between stored and deployed positions inherently provides the locking action, eliminating the need for separate complex locking components. This merging reduces part quantity while maintaining reliable locking stability.
Solution Approach 2:
The blade structure itself performs the locking function through its geometric configuration and interaction with the shank components. The blade's own movement and positioning create the locking effect without requiring external locking mechanisms, reducing complexity while ensuring reliability.
3Reliability
If multiple locking mechanism parts are used, then the locking function can be implemented, but the fit tolerance between parts becomes difficult to ensure
Solution Approach 1:
By merging the locking function into the blade deployment mechanism itself, the number of separate parts requiring fit tolerance is reduced. The integrated design eliminates multiple interfaces between separate locking components, thereby reducing manufacturing precision requirements while maintaining reliable locking performance.
4Device complexity
If a simple adjustment mechanism is used, then the structure is simplified, but the working stability during unlocking/locking may be insufficient
Solution Approach 1:
The mechanism uses dynamic interaction between the blade movement and the shank components to achieve stable locking. The blade's deployment and retraction movements create dynamic locking and unlocking actions that are simple in structure but reliable in performance, resolving the contradiction between simplicity and stability.
Data Source
AI summary
A folding knife comprises a shank, a blade, a sleeve, a T-shaped lock lever, a cover plate, and an adjusting screw. The shank comprises a left handle and a right handle defining a storage slot. The sleeve has a guide hole and a guide slot. The T-shaped lock lever has a button lever and a guide lever, and the guide lever comprises a first lock catch and a second lock catch. The lock lever is installed in the guide hole. The blade has a lock hole. The cover plate is located on a right side of the right handle and is connected to a right end of the sleeve by adjusting screws.