Door/Window Protective Devices TRIZ Cases

Solid fitting protrusions resiliently engage hollow holes in operation cord coupling portions, preventing premature breakage under significant usage loads.

A bottom member tilts as it lowers to overlap slats and block light in insulated glazing units.

Counter-weight balancing and magnetic coupling reduce control force for large blinds while preventing transport damage.

A rotary locking mechanism with eccentric actuating arms secures roller shutter shafts through translational movement conversion.

A universal support bracket allows selective mounting via insertion or adhesion, eliminating the need for multiple specialized support types.

Friction balance point brass rollers synchronize lift cord tension, eliminating child safety hazards from pull cords while ensuring stable positioning.

Electromagnetic actuators generate repulsive forces to levitate door leaves, eliminating sliding friction and wear from traditional roller guides.

Adjustable composite door assemblies use rail extensions and reinforcement plates to modify height while maintaining structural integrity.

A mechanical switching element detects torque changes to actuate limit switches at both end positions of a roller shutter drive.

Guide elements constrain relative positioning of semi-cylindrical elements, enabling single-person installation without complex hole alignment.

Segmented slat cross-sections with varying curvature radii resolve the trade-off between glare protection and illumination uniformity.

Electromechanical actuator defines distinct angular speed setpoints for docking zones to maintain constant linear speed of rollable elements.

Breakaway tabs with magnets activate switches along a support column to detect decoupling, stopping door motion before vehicle impact causes structural damage.

Guide rods direct transmission cords around one-way clutch wheels, preventing tangling and ensuring smooth window blind positioning.

Spring-loaded mating surfaces press against gap edges to secure sunshades without drilling, preserving profile integrity.

A detachable screen connection device uses a slideable second member and pivot joint to enable flexible deployment on vehicles.

Break-off side rail with reinforcement member adjusts length without compromising structural integrity or appearance.

Actuator measures torque variations during movement to determine a reference position for automatic operation.

Replacing mechanical brakes with a synchronous motor eliminates gear wear and brake failure risks during power outages for high-speed industrial gates.

Segmented attachment mechanisms with reversible profiles accommodate varying slat thicknesses, reducing inventory complexity and manufacturing costs.

A window blind uses ladder tapes with dual warps to pull slats tightly closed for effective light shielding.

A door edge light grid encodes distance information within a modulated signal frequency to convey precise object proximity data.

Elongated fastener apertures allow the seal to accommodate dynamic movement while blocking air leaks and pest entry.

CNC milling creates unitary face panels from medium-density fiberboard for custom sectional overhead doors.

Switching elements on a window handle wirelessly actuate peripheral devices, eliminating complex cabling and separate controllers.

A cone-shaped cord reel paired with a spring-loaded cam mechanism adjusts lifting torque to counterbalance cellular shade weight and shrinking forces.

A shutter winding control system uses dual position sensors to measure screen location via wireless communication.

Rotatable pins engage seats to prevent shaft rotation during assembly, ensuring accurate configuration before lateral profile connection.

A controller uses a processor clock to measure travel time during calibration mode.

A composite guide pin with plastic and metal sections reduces noise from slat movement while maintaining smooth operation.

A segmented sensing edge uses tactile sensors to detect obstruction locations along a motorized door.

Nested spring-loaded pawls engage guide intrusions to prevent accidental upward sliding of profile slats.