Folding Knife Locking Bridge Mechanism for One-Handed Safety

The patent combines the locking and unlocking functions into a single integrated locking structure. The button simultaneously controls both the locking bridge engagement with the blade and the release mechanism, eliminating the need for separate manual safety locks or latches. This integration maintains locking firmness through the locking bridge's mechanical engagement while preserving control convenience by requiring only one-handed button operation.

The patent implements a blade return path design where the blade must first return to a safe position before the unlocking switch becomes accessible. The button is positioned such that during normal operation, the blade's movement along its return path naturally covers or protects the button area. This preliminary positioning action ensures that the button is only accessible when the blade is in a controlled state, preventing misoperation while maintaining ease of intentional unlocking.

The patent applies local quality by concentrating the locking firmness function in the locking bridge's engagement point with the blade, rather than uniformly enlarging all components. The locking bridge is designed with a specific contact geometry that maximizes mechanical advantage and locking strength at the critical interface. Other components like the button and springs are kept compact, achieving reliable locking through localized structural optimization rather than overall size increase.