Construction Fastening Devices TRIZ Cases

A pivoting locking element features a flush support surface that merges continuously with the housing in the open position.

A double torsion spring absorbs tolerance gaps between the claw and pawl, reducing noise generation while increasing operating force.

Flush latch employs color-coded visual indicators to resolve aerodynamic constraints and visibility issues.

An extended sidewall on a window latch housing resists detachment from side jambs under extreme wind loads by maintaining bolt engagement.

A tubular lock assembly uses a detachable cover to enclose the keyhole, preventing dust ingress and technical cracking attempts.

A centrifuge locking mechanism uses a concavo-convex disc on the driving shaft to detect lid engagement via a single sensor.

Integrating a ratchet driver into the link lever reduces component count and assembly costs while maintaining anti-panic reliability.

Segmented sawtooth latching teeth eliminate assembly play by automatically engaging during tensioning, reducing wear and simplifying installation.

Sliding inner casing adjusts backset dimensions without removal, resolving complexity trade-offs via cam-driven segmentation.

A latch spacer secures a door lock assembly using sidewall friction and crush ribs to maintain position within the hollow core.

A rotating latch lock flange bends on the smooth surface of the latch to hold the pawl in the release position.

Inverted detection switch arrangement protects components from rainwater ingress while maintaining reliable door state sensing.

A lock cam mechanism uses two oblique sections to extend the bolt and secure it against back-pushing.

Pivot clamps hold fasteners on the inner housing, eliminating manual alignment difficulties during door lock installation.

A motor vehicle door latch uses a ratchet rotational connection between plastic levers to enable pivotable movement without bearing bolts.

A bolt passage window with a step-formed blocking section aligns locking cam projections to constrain drive rod displacement.

A combination lock uses a dedicated display face to show the selected variable combination code.

Moving the gear to the handle bar reduces frame width, resolving space constraints while maintaining tamper-proof security.

A rotary latch employs a spring-loaded joystick that pivots against a catch, reducing force requirements regardless of cable alignment.

Bayonet-style adjustment device compensates for variable door thicknesses to ensure secure fastening without pre-adjustment.

Pivoting the first fitting part under a U-leg spring element aligns toothed systems, enabling reliable coupling within shallow grooves.

A motor vehicle door lock catch lever maintains a blocking position via elastic coupling to prevent unintended opening.

A lockbox uses aligned apertures in its body and lid to secure padlock shackles, preventing unauthorized lid pivoting.

Internal gear transmission relocates the drive mechanism into the hollow profile, eliminating bulky external casings and reducing assembly complexity.

A vehicle lid lock uses a spiral torsion spring with fixed and moving arms to bias the latch mechanism.