Operating Chairs TRIZ Cases

A releasable heel or ankle lift raises the lower leg for bandaging and bathing, reducing nurse back strain and improving fluid handling.

A single-actuator cam and carriage mechanism coordinates seat and backrest motion, simplifying dental chair adjustment and maintenance.

Nested pitch, yaw, and roll frames enable unlimited independent body rotation while keeping motors outside the rotational space to limit EMI.

A staged lift speed starts slowly, then accelerates to shorten stand-up time without startling users or draining battery power.

Multiple inflatable chambers and concave shaping direct sitting load into deep stabilizing muscles to improve posture and reduce spinal overload.

A modular head restraint with support wings and a movable seatback balances rigid occupant support with easier rear-seat access.

By moving the massage unit into the upper seat back, neck and shoulder targeting can be adjusted freely without affecting headrest safety.

Independent horizontal and vertical drive assemblies let an infant chair reproduce caregiver-like rocking, bouncing, and swinging motions.

By moving tilt actuation to the seat outer surface, this case raises the front edge while keeping seating height low and easing door-rocker passage.

Two racquet-like pivoting components interlock into a lightweight chair that is easier to carry at sporting events while still providing ergonomic seating.

A decoupled footrest and reclining mechanism keeps T-cushion seating aligned with the backrest while concealing hardware in high-leg chairs.

A composite foam-fiber boot off-loads the heel, supports tubing use, improves airflow, and helps prevent foot drop and pressure sores.

A weight-driven seat squab and backrest linkage improves sitting comfort while lowering the seat for compact stowage under desks.

Guided link units and a spring-assisted rod let the chair leg rest extend and retract independently without moving the backrest.

A movable seat section rotates the pelvis during verticalization, reducing lumbar compression and avoiding hyperlordosis in rehab seating.

Auditory canal position sensing lets a medical robot align its tool center point to the vestibular organ for more precise vertigo therapy.

Telescopic side supports and an auxiliary seat section let one wheelchair fit different patient sizes without storing multiple chairs.

Slow periodic seat actuator movement reduces fatigue and circulation restriction while pausing adjustment during braking for safety.

A curved support bar, ramps, and rollers lift the seat during recline to align motion with the hips, reduce pressure, and keep feet grounded.

Elastic disks and bushings create adjustable turning friction so a link chain bends easily yet holds recliner and sofa positions without added force.

A spring-supported seat pan uses cam-guided extension to improve passenger comfort while limiting compressive spine loading in crash tests.

A lift link with an oblong-slot backrest coupling and cam flange lets a rocker-recliner form a nearly flat seat, backrest, and footrest plane.

A nested multi-link footrest mechanism extends far in TV and reclined positions while fitting beneath low-profile or off-the-floor chair seats.

Elastomeric straps let a chair back recline and hold position without bulky linkages or locks, reducing cost while improving comfort.

A rotatable release mechanism lets a powered headrest hold any forward angle while the actuator retracts safely if return travel is blocked.

A nested ottoman linkage lets high-leg recliners add TV and full-recline positions without the bulk of conventional chair mechanisms.

Multiple weld points and a reinforced upper-frame attachment strengthen the headrest bracket and limit collision deflection.

Visual indicators and a side-access lever make task chair resistance settings easier to find, understand, and adjust in shared use.

An electric motor, solenoid, and pantograph linkage simplify reclining hardware while preserving occupant-controlled rocking with the leg rest extended.

An inflatable concave leg restraint improves immobilization and comfort in knee surgery while reducing sterilization burden and cross-contamination risk.

Motor-driven guide-path control replaces discrete ratchet positions, letting the seat base recline smoothly with less user effort.

A segmented footrest mounted between angled front legs lets a high-seat folding chair collapse for storage without losing strength or comfort.

Elastomeric deformable members replace separate recline parts, letting the seat move and tilt with the back for stable support in varied postures.

Independent arcuate seat and backrest motion keeps the user near equilibrium, improving posture support and reducing stress during movement.

Independent fluid-filled pods and enclosing pads redistribute pressure at bony prominences, preventing bottoming out in portable ulcer support.

A monolithic elastomeric bar replaces coiled springs to enable smooth furniture rocking while reducing frictional noise and mechanism complexity.

A gel-padded horseshoe headrest and adjustable skull pins stabilize pediatric skulls while reducing localized pressure and fracture risk.

A lever-actuated hinge and friction joints simplify chair headrest tilt and height adjustment while keeping positions secure and reliable.

A knob-locked interchangeable headrest lets specialists reposition or swap headrests quickly while preventing inadvertent axial removal.

A sliding support-plate mechanism reclines a wheelchair backrest smoothly while avoiding elbow contact, armrest interference, and hinge binding.

A compact seat-adjustment linkage keeps recliner motion above the base plate, enabling high-leg styling with closed, extended, and reclined positions.

A reciprocating arm frame shifts occupant weight forward during recline, extending glide travel while reducing backward tipping risk.

A linked headrest shifts from retracted to forward-tilted during recline, improving neck support without sacrificing a compact upright profile.

Flexible resilient members on a U-shaped chair base deliver comfortable recline while reducing base stress and manufacturing cost.

A rigid cast seat structure transmits adjustment force from one side while dual locking points simplify installation and improve crash load handling.

A pulley-based reclining chassis cuts friction noise and vibration while adapting chair back force for users of different weights.

Two electric actuators let a recliner seat back and leg rest move independently or together, adding automatic tilt for better comfort and control.

A linked headrest mechanism extends and tilts forward during recline to improve neck support without separate controls.

A master seat drives coupled slave seats through rotary shafts, cutting actuator cost while keeping pitch and roll synchronized.