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Development of Ergonomic Balance Seat(e-BASE) Chair
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 Title & Authors
Development of Ergonomic Balance Seat(e-BASE) Chair
Park, Jae Hee; Kim, Seung Hee; Kim, Min Uk; Jung, Hanbum; Shim, Young Soo; Ryu, Taehee;
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Objective: The aim of this study is to develop an ergonomic office chair that has an alarm function for the unbalanced sitting postures. Background: Contrary to expectation, it is reported that office workers sit on their chairs much more in unbalanced postures during daily work. Even though an office worker uses an ergonomically good-designed chair and begins their work in a good sitting posture, his/her posture is likely to shift to the unbalanced bad posture. Therefore, a posture alarm system would be very helpful in keeping office workers` good postures. Method: We developed a prototype chair with four load cells under a seat pan and one load cell beneath a backrest. Through some experiments, we set the criteria for unbalanced bad postures then implemented the criteria into the alarm system of the prototype chair. The chair called e-BASE chair could detect unbalance postures and show alarms for chair users. We also enhanced back support by developing a step-wised folding backrest. Results: The e-BASE chair showed better performance in interface pressure distributions and balanced posture ratio in VDT work. Conclusion: The ergonomic chair with posture alarm function(e-BASE chair) was developed. It showed better performance in seat pressure distribution and in keeping good posture during office work. Application: The posture alarm system and folding backrest can be applied to the new models of office chair.
Office chair;Sitting posture;Posture balance;Backrest;Ergonomic chair;Posture alarm;
 Cited by
Research of Body Pressure Distribution Change with the Use of BackJoy and Satisfaction of Human Sensibility,;;;;;

Journal of the Ergonomics Society of Korea, 2014. vol.33. 1, pp.59-68 crossref(new window)
ANSI, ANSI/HFES 100: Human Factors Engineering of Computer Workstations, 2007.

BIFMA, BIFMA G2: Ergonomic guidelines, 2002.

Carcone, S.M. and Keir, P.J., Effects of backrest design on biomechanics and comfort during seated work, Applied Ergonomics, 38, 755-764, 2007. crossref(new window)

Grandjean, E. and Hunting, W., Ergonomics of posture-review of various problems of standing and sitting posture, Applied Ergonomics, 8(3), 135-140, 1977. crossref(new window)

Herman Miller Inc., Sitting can be good for the circulatory system, Solution Essay, 2008.

ISO, Ergonomic requirements for office work with visual display terminals (VDTs), Part 5: Workstation layout and postural requirements, ISO 9241-5, 1998.

KATS, KS G 4102: Standards of office chair, 1999.

Kwak, W-.M. et al., Ergonomic design of office chair, J. of Korean Society of Deign Science, 31(12), 73-80, 1999.

Leuder, R.K, Seat comfort: A review of the construct in the office environment, Human Factors, 25(6), 701-711, 1983. crossref(new window)

Ministry of Employment and Labor, MOEL Directive 2012-72, Directive on the work management of VDT workers, 2012.

Mooney, V. et al., Comparison of pressure distribution qualities in seat cushion, Bulletin of Prosthetics Research, Spring, 129-143, 1971.

OSHA, OSHA 3092: Working safely with video display terminals, 1997.

O'Sullivana, K. et al., What do physiotherapists consider to be the best sitting spinal posture?, Manual Therapy, 17(5), 432-437, 2012. crossref(new window)

Park, J.H. et al., A study on the standards of furniture dimensions by using anthropometric data, KATS, 2009.

Park, J.H. et al., Body pressure distributions of the varying sitting postures in office work, Proc. of Spring Conference of ESK, 49-52, 2011a.

Park, J.H. et al., Posture warning seat and posture warning chair, Korea patent application number 10-2011-0051262, 2011b.

Park, S. et al., The effects of different frequencies of self-monitoring on safe sitting postures, J. of the KOSOS, 26(6), 97-103, 2011c.

Park, J.H. et al., Optimal hardness of seat cushion for office chairs by using body pressure distribution and tactile sense, Proc. of Autumn Conference of ESK, 2012.

Sanders, M.S. and McCormick, E.J., Human factors in engineering and design, 7th ed, McGraw Hill, 1993.

Shrempf, A. et al., Posture care-Towards a novel system for posture monitoring and guidance, Proc. of the 18th IFAC World Congress, 593-598, 2011.

Seigler, T.M., A comparative analysis of air-inflated and foam seat cushions for truck seats, Thesis of Master of Science, Virginia Polytechnic Institute and State University, 2002.

Sidiz Inc., Structure of variable backrest of chairs, Korea patent application number 10-2011-0050404, 2011.

Vergara, M. and Page, A., system to measure the use of the backrest in sitting-posture office tasks, Applied Ergonomics, 31, 247-254, 2000. crossref(new window)

Vos, G.A. et al., Postural versus chair design impacts upon interface pressure, Applied Ergonomics, 37, 619-628, 2006. crossref(new window)