Latching Locks TRIZ Cases
- Lock Status Indicator Mechanism for Hot-Door Emergency Access
A windowed lock indicator shows locked or unlocked status without touching a hot door handle, speeding emergency access during fires.
- Pivotable Latch Bolt That Stays Locked When Unlocked
A switchable latch head and slide-blocking mechanism keep the bolt engaged when unlocked, enabling electronic openers and quieter closure.
- Door Handle Limiter Integrated With Chain Lock Security
A latch-and-chain limiter blocks the inner door handle from being pushed down, closing a security gap in traditional door chain locks.
- Door Latch Shutter Mechanism Against Lock Bolt Tampering
A synchronized shutter covers the latch opening when the lock bolt retracts, blocking tampering that could stop secure door closure.
- Adjustable Door Latch With Rear Anti-Card Locking
A rear follower-driven anti-card mechanism keeps full bolt engagement while allowing latch length adjustment for secure, reliable door locking.
- Fireproof Door and Window Lock With Heat-Deteriorating Shoulder Unit
A heat-deteriorating shoulder unit releases a preloaded spring, keeping the bolt partially protruded to preserve fireproof closure.
- External Double-Locking Lock Mechanism for Easy Door Installation
Adapter-based locking enables keyless external double-locking with simpler installation.
- Latch Bolt With Ridged Rear Face For Smooth Retraction
An inclined distal portion and ridged rear face ensure smooth release under pressure by creating single point contact.
- Mortise Lock Control Latch Carrier for Rotating Main Latch
A control latch carrier moves through extension, retraction, and overtravel positions to actuate a locking element within a mortise lock assembly.
- Adjustable Backset Latch Tool Mechanism
A tool with slots and ears rotates a latch tailpiece and casing simultaneously to adjust backset positions.
- Mortise Lock Lever Mechanism for Striking Plate Release
Axially displaceable striking plate release lever converts linear motion into perpendicular bolt movement via an articulated lever.
- Pivotable Latch Assembly for High-Load Lock Reliability
Pivotable latch heads absorb transverse forces via wedge action, ensuring reliable unlocking under high initial loads.
- Dual-Locking Lock Structure with Strengthened Triangular Latch
A multifunctional lock structure uses a bolt control unit and strengthened triangular latch to achieve dual locking.
- Panic Lock Coupling Block for Multi-Function Adaptability
A panic lock coupling block links the actuating lever to the bolt mechanism via a single dynamic interface.
- Reinforced Door Lock Antipanic Bolt Retraction Mechanism
Handle rotation actuates a carousel mechanism that retracts the bolt without a key, enabling antipanic function in standard reinforced doors.
- Folded Metal Strike Plate with Plastic Spacer for Gate Security
A folded metal strike plate uses a plastic spacer to form a cavity that receives the deadbolt.
- Mortise Lock Pivoted Flap Anti-Lift Mechanism
A mortise lock integrates a pivoted flap to engage the locking circuit and secure the tumbler.
- Internal Door Lock Removable Locking Piece Deadlocking
A removable locking piece moves via a second follower to secure the latch bolt in place.
- Lock Mechanism with Movable Latchbolt for Variable Door Thickness
A lock mechanism uses a movable bush to adjust latchbolt positioning.
- Spring-Loaded Displacement Element for Panic Lock Cam Interference
A spring-loaded displacement element moves a lock cylinder cam out of the bolt path, enabling manual door opening when a key remains inserted.
- Lock Slide Holding Positions Prevent Unintended Locking
Segmented slide holding positions prevent unintended locking when stop elements fail.