Operating Chairs TRIZ Cases

A linked seat and back platform uses circular and eccentric motion to support safe transitions between sitting, lying, standing, and inverted positions.

Skewed cranks in a chair tilt linkage raise the front seat more than the rear, improving posture with a simpler, lower-cost mechanism.

A flexible pressure element in the seat-frame slider keeps guide rails clearance-free, cutting rattle noise, wear sensitivity, and cost.

A curved-base mattress creates a horizontal treatment surface on a dental chair, enabling secure in-room conversion for surgical and other procedures.

A pivoting thigh support and pelvic cradle let users vary seat angle, maintain spine alignment, and reduce mechanism complexity.

Non-concentric dual tracks guide wheelchair seat tilt to limit center-of-gravity shift, reducing falling sensation and adjustment burden.

A sliding pillow on guided tracks lets a folding chair support the head or lumbar area while adapting to upright and reclined seating.

A motor-driven tilt guide and transmission assembly reclines the exam chair smoothly while maintaining patient body alignment and comfort.

A rotating seat head rest shifts between lowered and inclined raised positions to free cargo space, improve visibility, and restore head support.

A rotatable seat cradle with integral lumbar and cushion sections keeps the spine and hips aligned as users shift weight.

A spring-biased rear portion lets the head restraint thin when the seatback folds, freeing cargo space while preserving upright head support.

A movable outer hemisphere over a fixed inner seat maintains spinal alignment while allowing balanced motion to reduce back and neck pain.

An elastic lower column coupling lets a chair tilt in any direction while keeping seating stable and reducing fall risk and floor damage.

A permanently attached straw wrapper cuts litter, while a bifurcated end opening filters seeds and pits without extra components.

A decoupled footrest and conditional rocker mechanism let the chair rock upright, lock when reclined, and add damping for smoother motion.

A sliding lower head support deploys for neck comfort and retracts flat to avoid shoulder intrusion and ease seat stowage.

Tapered receiving holes hold dental burs with different shank diameters in one organizer, improving selection speed, retention, and sterilization.

Path-joint platforms and an actuator let furniture shift safely between sitting, reclining, lying, and standing positions with locked support.

Indexed side rails and releasable clamps enable modular SBRT immobilization with precise, repeatable setup and easier patient transfer.

A rotatable key, alignment guides, and spring-biased push button enable quick headrest adjustment with secure locking and alignment feedback.

A sliding seat and linked reclining back keep the head near the washbasin while preserving working space behind the chair.

Curved guiding grooves and a torsion spring move the chair seat to keep the sitter's back against the backrest with adjustable support.

Interlocking planetary gears and sun gears synchronize right and left seat frames for smooth lifting, lower foot collision risk, and simplify assembly.

Adjustable friction and an eccentric hinge let the neck rest hold position over wear while improving comfort across user seating positions.

Adjustable head and neck support, dual-use armrests, and integrated stowage improve passenger comfort without disturbing tray tables or displays during recline.

Convex seat and backrest geometry aligns the hip and spine for female users while reducing fatigue, disc pressure, and adjustment complexity.

A double torsion spring rotates the head restraint into a comfortable use position while preserving rear visibility and occupant protection.

A shaft-hub seat pivot uses elastic return and selective friction to hold a chosen angle, prevent unwanted rotation, and support height adjustment.