Classic Rocker Thomas Dabrowski Sarah Philo Adam Rauwerdink

Outline Introduction Design Specifications and Constraints Benefits of Product Competitor Products Initial Designs Final Design Components of the Final design Budget Conclusion

Introduction What is the Classic Rocker? Mechanized legless rocking chair National Science Foundation funding Passionworks Studio Various mental and physical disabilities Coordination, muscle control, cognitive abilities

Design Specifications and Constraints Rocking Mechanism Must be safe and comfortable Controls Interchangeable User-friendly for both chair user and caretaker Caretaker master controls Audio Internal speakers Play compact discs

Need for product Caretakers must physically rock the chair Need for one caretaker per chair user User is dependent on caretaker – no sense of independence

Benefits of product Social User can rock without caretaker help Provides sense of independence Enjoyable experience Economic Fewer caretakers needed if multiple people rocking (multiple chairs needed)

Competitor Products Motorized rocking chair, by Electronic & Mechanical Assistant Technologies The Mechanical Rocking System, a Rensslear Polytechnic Institute NSF project Various non-mechanized legless video rocker products, found at retailers such as Wal-mart and Target

Initial Designs Safety 120V power must be completely isolated Shock and fire hazard Angle and speed of rocking User discomfort Chair stability Caretaker master control User cannot initiate functions while unsupervised Environmental Fabric must be durable Frequent use Easy to clean Economic Chair must be affordable

Initial Designs Design One Runners under chair Linear actuator Caretaker controls in back of chair Design Two Motor and cam system to back of frame Hinge mechanism on bottom Caretaker control tower Design Three Chair ‘swing’ Hinge mechanism Motor and cam system

Final Design Motor and cam system Hinge attached to both chair and base frame Master control tower User switches

Frame Aluminum frame 80/20 Extrusions Base and chair frame Hinge mechanism Chair reinforcement

Motor Dayton 12VDC gearmotor #1Z amps drawn when rocking 160 lb person 135 in-lb torque at 80 RPM 1/6 HP Geared to 20 RPM

Cam and Gear System Cam 1.4” diameter Gear system Geared down motor using 12 and 50 tooth gears Largest gear is 14” behind the chair frame Moving parts covered for safety

Link System Link 3/8 X 32 inch threaded rod connected to cam and chair frame Linkage Pivot Connects linkage bar to chair frame Pivot block connected to bearing block then link Connected to cam Cam pin connects to bearing block then link

Complete Motor Assembly

Power Meanwell S VDC extension cord plug Rated 18 A 216 W

Controls User Touch switch Squish switch Overridden by master switches Interchangeable Plug in under caretaker control tower Control stand Caretaker Master controls, including master power CD player Variable speed Caretaker control tower

Master Controls

Wiring Schematic

Audio Boss Audio CD-3020 player installed in tower behind chair Speakers inside headrest of chair

Completed Chair

Control Schematic

Conclusion Fully mechanized rocking motion – no need for caretaker to physically rock the user Simple controls for use by individuals with mental/physical disabilities Durable and strong rocking mechanism Safety throughout – electrical and mechanical Enjoyable and relaxing

Acknowledgements Engineering Machine Shop – Rich and Serg Prof. Christian Davis Linens n’ Things - discount Christopher Liebler OKW – Jeff Duchess

The End. Questions?