Keyhole Guards TRIZ Cases

See how a ratchet-pawl lock assembly prevents key removal after item retrieval, stopping unauth

See how a ratchet-and-pawl lock assembly prevents key removal after unlocking, ensuring control

See how a sliding cover on rails replaces hinged designs to enable full horizontal access, prev

See how a mobile ballistic panel with pivot locking and cable release barricades doors without

See how a pushbutton-in-body locking assembly switches between key-opening and pushbutton-openi

See how a slideable cover on rails enables full 180° opening for wall-mounted dispensers, impro

See how a rail-guided sliding cover replaces hinged rotation to enable full horizontal access f

See how a cam-actuated latch replaces multiple keyed locks with a single spring-biased rotatabl

A rail-guided sliding cover enables horizontal refill insertion, improving access for shorter users while reducing cover breakage risk.

A central lock selects one auxiliary lock at a time, keeping all other keys secured and preventing simultaneous key removal or misuse.

A two-piece rotor layout enables smaller, application-specific lock barrier assemblies while simplifying replacement and improving burglary resistance.

A position-based release and centrifugal-pawl freewheel cut friction and bulk in electronic locks while improving energy harvesting.

A flexible flap drops over the interior door lever to give exiting drivers a tactile and visual occupancy reminder without obstructing access.

A hanging flexible flap covers the interior door handle on exit, giving a low-cost occupant reminder without alarms, wiring, or blocked egress.

A gearless release and freewheel mechanism reduces frictional losses while enabling compact power generation in electronic locks.

A perpendicular motor and integrated coupling member cut lock axial protrusion while preserving reliable selective engagement and low power use.

An activation member switches a bolt stopper to automate door latching, reduce manual handle rotation, and protect the bolt from damage.

By moving the electric clutch into the front fixed frame, this case eases ball lock assembly while preserving compact structure and reliable unlocking.

A snap-in locking plunger replaces separate wheel and push-rod parts to save space, improve alignment, and secure safety doors.

A detent piston replaces bulky ratchet-wheel locking, enabling flexible actuator insertion, high locking force, and secure RFID-monitored door interlocks.

A snap-in plunger and bistable solenoid cut housing space and alignment work while preserving fail-safe locking and RFID monitoring.

Angled rotating lock bars block lever handle operation to deter child use while keeping the lock simple, secure, and easy to use.

Integrating the override keyway into the drive spindle makes backup unlocking easier to access during power loss.

A reversible deformable leg declutches a vehicle door handle at a torque threshold, preserving haptic feel and enabling mechanical opening after power loss.

A cam-and-torsion-spring indicator cuts friction and clearly shows IN USE or VACANT from outside the door.

An axially movable coupling spindle and barrier lock out the exterior handle until inner-handle pivoting releases secure door operation.

A longitudinal power-transmission layout fits a door-lock mechanism into 50 mm sectional door frames without losing deadbolt locking function.

Pre-assembled inner tube and shaft lock rotational position, speeding door lock installation on thin doors while reducing resistance.

A spiral-groove lock links the indoor button, cam, and display block to show lock status clearly and enable simple emergency unlocking.

A spring-loaded locking bolt secures a cabinet locking cylinder in seconds without tools or handle disassembly, while resisting unauthorized removal.

Dual interior and exterior lock cylinders let exit trim be locked from either side without a new center case, while adding night latch hold-open.

A spring-biased catch and plunger let a cylinder lock adapter fit existing door locks and secure padlocks without structural modification.

A spring-biased catch and plunger let padlocks secure existing door locks without modifying the lock structure.

Projection features on the mounting plate fit door holes to simplify night latch alignment, improve positioning stability, and cut bulk.

Fastener access is blocked in the locked handle position, making night latch removal harder while simplifying door attachment.

A linkage plate drives the lock plate directly into and out of the locking groove, avoiding cam-ball jamming during reverse locking and unlocking.

A modular cam layout separates deadlock and panic release paths, preserving emergency latch retraction while supporting multiple actuator types.

A single driving member links two rotating members to simplify electronic lock control while preserving one-way access during power outages.

A magnet-held screw guard and retainment assembly let authorized users replace an electronic lock core without changing the full lock.

A spring-loaded latch lets classroom doors lock without a key, cutting emergency lockdown time while keeping normal handle operation.

A dual engagement and weight-actuated retainer keeps container lids closed against tampering and impact, yet opens automatically when tilted.

A rear quick-opening handle and status indicator plate simplify emergency escape while clearly showing whether the door is locked or unlocked.

Dual manual override paths keep the lock operable when power is lost, preserving electronic access control without losing emergency unlocking.

A tilting coupling lets a keyed external emergency door controller switch the handle between latch actuation and idle stroke in a compact housing.

A cam latch and shutter block spindle access and rotation after trim removal, keeping the deadbolt locked against forced entry.

Pre-assembled inner tube and shaft features simplify door lock alignment and cut rotational resistance on thin doors.

A rotary-disk linkage retracts the locking tongue and safety pin together, cutting RV door unlocking steps and enabling intelligent access.