触摸屏视屏作业肌肉骨骼损伤及相关设计初步研究

摘要

目的:对触摸屏视屏作业肌肉骨骼损伤进行研究,为触摸屏相关设计提供依据.方法:采用全面试验设计和表面肌电采集方法,将触摸屏尺寸和放置角度作为自变量,将指浅屈肌(flexor digitorum superfieialis,FDS)、指总伸肌(extensor digitorum communis,EDC)、腕桡侧伸肌(extensor carpi radialis,ECR)、腕尺侧伸肌(extensor carpi ulnaris,ECU)负荷和疲劳作为因变量,分析触摸屏尺寸和放置角度对被测肌肉负荷与疲劳的影响.结果:触摸屏视屏作业的点击成功率和精确率在不同触摸屏尺寸和放置角度水平下没有显著不同.在不同放置角度水平下,FDS和EDC的最大肌力百分比都随触摸屏增大而增大.在不同触摸屏尺寸水平下,FDS的最大肌力百分比随放置角度增大而减小,EDC的最大肌力百分比随放置角度增大而增大.所有被测肌肉的中位频率没有随时间显著减小.结论:该研究能够为优化触摸屏设计提供依据,有助于减少肌肉骨骼损伤风险,达到一级预防的目的.%Objective To analyze the musculoskeletal injuries related to touch screen VDT operation and design implications.Methods The effects of touch screen size and angles on touch-screen-VDT-operation-related muscle load and fatigue were explored using thorough experiment and EMG acquisition method,and the independent variables included the size and angle and the dependant variables consisted of the load and fatigue of flexor digitorum superficialis (FDS),extensor digitorum communis (EDC),extensor carpi radialis (ECR) and extensor carpi ulnaris (ECU).Results No significant difference was found with regard to pointing success rate and accuracy at all screen sizes and angles levels.FDS and EDC MVC％ increased with increasing touch screen size at all levels of angles.FDS MVC％ decreased while EDC MVC％ increased with inclining angles at all levels of touch screen sizes.All measured muscles' MF did not decrease with time.Conclusion This study helps to provide basis for the optimization of equipment design,reduce exposure to musculoskeletal injuries risks and implement primary prevention.