- Volume 31 Issue 3
The aim of this study is to develop an ergonomic design of magic saw handle considering user experiences. Background: Frequent use of hand tool can cause musculoskeletal disorders by inadequate wrist posture, excessive strength, repetitiveness, friction and pressure, vibration, etc. A hand tool that is inappropriately designed has higher risk causing musculoskeletal disorders. Complaints for the design of magic saw handle has been raised by many users according to the increasing use of magic saw. Method: Hand tool has to be designed considering worker's characteristics and task condition to prevent worker's musculoskeletal disorders. For this, user experiences for magic saw handle were measured through questionnaire survey and observation. Results: An ergonomic design of magic saw handle considering user experiences was proposed and then its design suitability was evaluated in comparison with the existing handle design using EMG and subjective evaluation. Conclusion: The proposed handle design showed higher satisfaction and lower muscular fatigue. Application: The results of this study can be effectively used to develop a new magic saw.
Magic saw;Ergonomic design;EMG;Subjective evaluation
- Armstrong, T. and Silverstein, B., Upper extremity pain in the workplace-Role of usage in causality. In Hadler, N.(Ed.), Clinical Concepts in Regional Musculoskeletal Illness, Grune and Stratton, 333-354, 1987.
- Bilodeau, M., Schindler-Ivens, S., Williams, D. M., Chandran, R. and Sharma, S. S., EMG frequency content changes with increasing force and during fatigue in the quadriceps femoris muscle of men and women, Journal of Electromyography and Kinesiology, 13, 83-92, 2003. https://doi.org/10.1016/S1050-6411(02)00050-0
- Chaffin, D. B., Andersson, G. B. J. and Martin, B. J., Occupational Ergonomics, 4th ed., John Wiley & Sons, New Jersey, 249-263, 2006.
- Chang, Joon H., et al. The Analysis of Terminal Clipping Tool by the Characteristics of Pressure & EMG related by Upper Limb, Journal of the Ergonomics Society of Korea, 9(2), 473-478, 2006.
- Cho, Y. J. and Kim, J. Y., The Effect of the Signal Stationarity on the EMG Frequency Analysis, Journal of the Ergonomics Society of Korea, 29(2), 183-188, 2010. https://doi.org/10.5143/JESK.2010.29.2.183
- Kadefors, R., Petersen, I. and Broman, H., Spectral analysis of events in the electromyogram, New Dep. Electroqogr. clin. Neurophysiol. 1, 628-637, 1973.
- Kee, Dohyung, Performance, Wrist Motion and Subjective Rating for Handle Angle of Pliers, Journal of the Ergonomics Society of Korea, 27(2), 49-57, 2008. https://doi.org/10.5143/JESK.2008.27.2.049
- Park, H. S. and Lee, M. R., Application of Quality Function Deployment to Ergonomic Design of a Plier, Journal of the Ergonomics Society of Korea, 26(4), 85-90, 2007. https://doi.org/10.5143/JESK.2007.26.4.085
- Roy, S. H., Combined use of surface electromyography and 31P-NMR spectroscopy for the study of muscle disorders, Physical Therapy, 73, 892-901, 1993. https://doi.org/10.1093/ptj/73.12.892