Retractable Blade Locking Claws to Prevent Retraction and Shake
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Solution Overview
Problem
Flail knives and straight jump knives with retractable blades face issues of blade retraction and shaking during use, posing safety risks.
Innovation Solution
A locking blade device with mechanical claws on the knife sleeve and locking grooves on the blade, controlled by a push button, ensures the blade remains locked and stable during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a retractable blade design is used, then the knife can be concealed and carried safely, but the blade may retract back into the knife sleeve during use causing safety risks
Solution Approach 1:
The blade is designed to be movable during deployment and then locked in a fixed position during use. The mechanical claw transitions from a free state during insertion to a locked state during use, allowing the blade to be concealed when not needed and securely fixed when deployed.
Solution Approach 2:
The mechanical claw acts as an intermediary component between the blade and the knife sleeve. It engages with the blade via the locking groove and the clamping end head, preventing the blade from retracting while allowing smooth deployment when the push button is pressed.
2Ease of operation
If a retractable blade design is used, then the knife can be carried compactly, but the blade may shake left and right during cutting operations
Solution Approach 1:
The blade transitions from a movable state during deployment to a locked stable state during use. The mechanical claw provides lateral support when engaged, preventing unwanted blade movement while maintaining compact portability when retracted.
Solution Approach 2:
The mechanical claw serves as a stabilizing intermediary that engages with the blade's locking groove to prevent lateral movement during cutting operations, while allowing the blade to remain compact within the sleeve when not in use.
3Reliability
If mechanical claws with push button control are added, then the blade can be locked securely, but the device complexity increases
Solution Approach 1:
The mechanical claw is designed to automatically engage with the blade's locking groove when the push button is pressed, utilizing the blade's own geometry and the claw's spring-loaded mechanism to achieve locking without additional complex control systems.
Solution Approach 2:
The mechanical claw uses a simple spring-loaded design that can be easily manufactured and assembled. The push button mechanism allows for simple engagement and disengagement of the locking function, reducing overall system complexity while maintaining reliable locking.
Data Source
AI summary
A locking blade device is provided, which includes a knife sleeve and mechanical claws disposed on two sides of an end of the knife sleeve. An end of each of the mechanical claws is hinged with the knife sleeve. A blade is slidably disposed in the knife sleeve. Two sides of the blade are provided with locking grooves. The other end of each of the mechanical claws is provided with a clamping end head configured to clamp into a corresponding one of the locking grooves. A push button is slidably disposed on the knife sleeve and is movably connected to the mechanical claws, and the push button is configured to make the clamping end head be clamped into the corresponding one of the locking grooves. The knife sleeve includes an upper cover, a lower cover, and a fixing frame disposed between the upper cover and the lower cover.