Keyhole Guards TRIZ Cases

A locking cylinder uses platelet tumblers shiftable in different radial directions to prevent unauthorized access.

A compact electronic cam lock uses a motor-driven worm gear to move a blocking pin for secure access control.

A magnetic child safety cabinet lock uses dual magnets to control a push button mechanism for secure latching.

A modular door lock actuator adapts to different latch devices via an interchangeable driving member, reducing manufacturing costs and design complexity.

Replacing mechanical weights with an eddy current brake prevents sabotage at high speeds while avoiding mechanical overload.

Depressing end cap button rotates modified latch plate via connecting rod assembly, eliminating hex key requirement for door security.

A window door fitting clutch bell assembly integrates spiral and cup springs to secure handle engagement.

Integrating latch and bolt control via one key cylinder reduces part count while preventing jamb damage from accidental operation.

An unlocking device merges a pressure profile and gear mechanism into the door base profile to actuate panic locks without additional milling.

Nesting the retractable sleeve within the housing prevents tampering with the lock assembly while allowing authorized operation of casement windows.

Segmented support frame resolves assembly complexity in modular door locks while maintaining structural fastness.

A compact lock mechanism uses a cam system to fix a slide bar in two positions.

A car-shaped padlock integrates combination dials and a key cylinder within one housing.

Nested cylinder and asymmetric mounting resolve burglary resistance trade-offs by securing the lock against unauthorized removal.

Elastically deflecting actuating extension prevents collision blocking by moving clutch transmitter to engage latch during bolt retraction.

A trapped-key locking mechanism regulates docking station doors to prevent unauthorized cable connections.

Segmented housing protrusions prevent unauthorized window access without increasing mechanical complexity.

Rotating the locking mechanism selects one side for code entry while freeing the other, eliminating duplicate hardware and reducing device complexity.

Replacing complex electrical immobilizers, this mechanical rod prevents unauthorized vehicle operation by blocking pedal movement.

Molded plastic toggle latch uses a forward nose ramp to deflect the arm upward for automatic engagement.

Integrating a motorized plunger into the latch mechanism enables electrical unlocking, reducing installation time and cost while maintaining weather resistance.

An eccentric keyway profile restricts padlock key removal to a single position.

External pins override internal bolt position to enable tool-free door opening when the interior is blocked.

Segmented springs housed inside the latchset body bias each cam independently, allowing bidirectional lever rotation without external trim hardware.

A rotary latch assembly integrates locking paddles and a sealing mechanism into an aircraft galley door structure.

Segmenting the locking mechanism into fixed and movable components allows an intermediary lock to secure the actuator without requiring external padlocks.

A decoupling mechanism separates the driver element from the axle during manual rotation, reducing wear on the electromechanical drive.

A spring-loaded latch engages a hook bore to secure the front cover of luggage against forced entry.

A Safe Key Park Brake knob integrates a centered key locking system with the air brake valve rod assembly.

Nested lock head structures fix electronic keys within cylinder plugs, preventing escape when doors open or close.

A safety lock bolt mechanism uses a releasable handle to control reciprocation.

Independent interior and exterior door latch actuation mechanisms with a conversion block decouple locking from latching.

A spring-loaded cam member secures the deadbolt latch in its locked position, preventing unauthorized unlocking via lock picking or counterfeit keys.

A lock assembly uses a cord-driven latch and mesh network to enable remote state transitions.

Anti-rotation pin prevents independent tailpiece rotation after forced disconnection, maintaining lock security.

A pivoting closure bar with recesses guides a blocking pin to secure the handle in locking or release positions.

A door lock regulating assembly switches the operating mechanism into an idle state to protect internal components from forced rotation.

Segmented retractors with a blocker assembly prevent overtorquing attacks from forcing the outer retractor, maintaining security.

A door lock houses a positioning resilient component within a locking assembly casing to secure the mechanism.

A pin tumbler lock maintains a gap between driver and tumbler pins to dissipate impact energy, preventing unauthorized access via bumping.

A motor vehicle door handle group uses a coupling lever and safety lever to control the closing mechanism via a Bowden cable.

A key-operable lockset integrates plug rotation with handle actuation to retract the latchbolt for single-handed door opening.

A locking device uses a slide element to disengage a blocking component, enabling one-handed key removal.

A push-in emergency stop cover integrates a plug-in unit to secure the lock mechanism without external tools.

Integrated handling body rotates a coupling element to drive the cam and bolt, eliminating separate handles and reducing structural complexity.

A lock cylinder uses eccentric key rotation to align grooves with a stationary disc, enabling precise axial key removal.

An activation unit cancels the electromagnetic block on a locking nut, enabling manual door opening without mechanical assistance.

An asymmetric pin configuration with a recessed bottom pin blocks impressioning and bumping attacks by requiring specific key geometry.