Construction Fastening Devices TRIZ Cases

A window fitting locking element moves transversely relative to a drive rod for secure engagement.

A locking mechanism with asymmetric engagement quantities prevents cover half-open states in image forming apparatuses.

Comb-like sections distribute impact forces while an asymmetric bolt prevents unauthorized access, reducing maintenance needs.

A rod guide clamping rocker springs outward to engage stud bolt threads with reduced manual force.

A motor vehicle lock uses a switchable coupling arrangement to control pawl actuation lever movement.

A locking device lever moves the bolt in sync with knob rotation.

A gate latch assembly uses a pin engagement system to secure swinging and sliding gates.

A tonneau cover latch mechanism moves from locked to unlocked position via tailgate engagement.

A motor vehicle cover closing device uses a Bowden cable to actuate a rotary latch and catch hook sequentially.

A door lock lever stopper mechanism constrains closing lever rotation to maintain control projection spacing.

A vehicle door latch memory lever blocks pawl movement to prevent ratchet obstruction.

A tonneau cover latch system uses a cable-operated ratchet striker to secure the header portion.

A torque-limiting clutch mechanism disengages under excessive force to protect safe internal components from forced entry attempts.

Segmented drive pinions resolve the reliability versus ease of operation trade-off in espagnolette locks.

A continuous elastic connecting element spans the door leaf core to actuate multiple locking devices from a single source.

A pin assembly uses a spring-loaded latch to drive an engagement pin through aligned panel openings for rapid structural connection.

A self-cancel lever mechanism in a door latch assembly automatically disengages the lock link when the door closes.

An arcuate mounting bracket accommodates diverse post shapes while a nested pivot mechanism prevents unauthorized opening.

Dual switches monitor ratchet engagement and transmission operation to detect insufficient locking states, preventing unintended door opening during travel.

A lost motion driver mechanism enables 180-degree rotation of interchangeable lock cores without housing removal.

A spindle-mounted lock-handing selector enables rapid right-to-left conversion of mortise locks without disassembly.

A vehicle door latch assembly uses a deformable blocking plate to constrain pawl rotation during impact events.

Telescopic transmission rod with pivot-hole coupling eliminates manual drilling during installation.

An eccentric coupling rod transforms pinion rotation into oscillating drive motion for locking mechanisms.

A crushing body extraction mechanism linearly moves housing and rollers outside the frame for maintenance access.

Active lever swivels around a first support shaft to drive the release lever via direct engagement sections.

A cremone bolt handle uses a toothed coupling on a sliding tab to align mounting plates with frame slots.

A guide pin hook engages a groove projection to transfer operating forces via bearing surfaces.

A universal bracket with slots and pivot holes aligns push pull door operating devices to various latch configurations.

A door lock monitoring device uses a displaceable sensor unit to maintain alignment between the bolt and reed contact.

Transverse beads on the coupling shoe prevent U-flange deviation under load, allowing thinner material use and reducing manufacturing costs.

A rotating hook bolt resists forced entry while enabling universal installation on right or left-handed doors, eliminating separate lock variants.

A motor vehicle door lock uses a catch lever to block the locking mechanism during crash acceleration events.

A combination lock uses V-shaped grooves and angles to mechanically display the correct password sequence through an indicator window.

Coupling spring element decouples force transmission chain sections during high acceleration events to prevent unintended door opening.

Offset center of mass lock lever rotates upon side impact acceleration to disconnect the exterior handle.

Merged blocking lever and pawl components reduce device complexity while ensuring safe door operation.

Integrating active and sub levers via a biasing member simplifies manufacturing while enabling smooth door unlocking during panic states.

A universal vehicle door latch system standardizes mechanical components across diverse models.

A corner guide uses a clasping bracket and elastic angled guide to secure window drive components within the groove.

Mismatched gear teeth lock the connecting rod against unauthorized movement while maintaining operational smoothness.

Biased lock pins engage bushings to eliminate squeaks and rattles while maintaining consistent closure effort across temperature variations.

A flexible guide element routes a concealed locking bar to a mortise lock, eliminating trial-and-error alignment during installation.

Pivotable stand and console segments collapse flatly via fastener positioning assemblies to reduce storage volume.

Positioning the tilt pin 4 mm to 29 mm above the rebate surface reduces contact pressure on the frame while simplifying the tilting mechanism.

Segmenting rebate formation into discrete drill holes eliminates complex routing, reducing installation time for latch assemblies.

Directly coupled pivoting levers transmit force within a nested housing, reducing transmission losses in limited installation space.

A dual action latch uses a cam and lever arm to withdraw an elongate bolt into the housing.

A refuse receptacle lock device uses a rotary knob to pivot a swivel hook for securing the second lid.

Integrated locking component merges latch bolt, cam, and reset spring functions to simplify assembly procedures.