Optimal cylindrical handle diameter for grip force tasks
Optimal cylindrical handle diameter for grip force tasks
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DOI：
10.1016/j.ergon.2004.11.003
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发表时间：
2005-06-01
影响因子：
3.1
通讯作者：
Lowe, BD
中科院分区：
文献类型：
--
作者：
Kong, YK;Lowe, BD
本研究测试了圆柱形铝手柄上的最大握力，以评估手柄直径（直径为 25-50 毫米的手柄）、感知舒适度、手指和指骨力分布以及手指屈肌和伸肌活动的肌电图效率之间的关系。开发了包含 16 个薄型力传感器的测力手套系统，用于测量圆柱形手柄上的手指和指骨力。参与者 (n = 24) 将中型手柄（30、35 和 40 毫米）评为最舒适的手柄，可发挥最大握力。使用多项式回归，将主观舒适度最大化的手柄直径计算为用户手长的函数。该最佳手柄直径为使用者手长的 19.7%。总手指力量能力与手柄直径成反比。主要屈肌和伸肌的肌电图幅度不受手柄直径的影响，因此肌肉电活动的效率与手柄直径的关系与总手指力的关系相同。检查各个手指和指骨的力分布，以评估它们与感知舒适度的关系。与均匀的手指/指骨力分布相比，不均匀的手指/指骨力分布（其中手指力与手指肌肉能力成正比）与舒适度的主观评分具有更强的相关性。本研究获得的结果将为手动工具设计者和制造商提供指导，以根据用户的手部尺寸最大限度地提高手柄舒适度。 © 2004 Elsevier B.V. 保留所有权利。
This study tested maximum grip force on cylindrical aluminum handles to evaluate the relationships between handle diameter (25-50 mm diameter handles), perceived comfort, finger and phalange force distribution, and electromyographic efficiency of finger flexor and extensor muscle activity. A force glove system containing 16 thin profile force sensors was developed to measure finger and phalangeal forces on the cylindrical handles. Participants (n = 24) rated the mid-sized handles (30, 35 and 40 mm) as the most comfortable for maximum grip force exertions. Using a polynomial regression the handle diameter that maximized subjective comfort was calculated as a function of the user's hand length. This optimal handle diameter was 19.7% of the user's hand length. Total finger force capability was inversely related with handle diameter. Electromyographic amplitude of the primary flexor and extensor was unaffected by handle diameter, so the efficiency of the muscle electrical activity followed the same relationship with handle diameter as total finger force. Individual finger and phalange force distributions were examined to evaluate their relationship with perceived comfort. A non-uniform finger/phalange force distribution, in which finger force was proportional to finger muscle capabilities, exhibited a stronger correlation with subjective ratings of comfort than a uniform finger/phalange force distribution.Results obtained in this study will provide guidelines to hand-tool designers and manufacturers for maximizing handle comfort based on the user's hand size. © 2004 Elsevier B.V. All rights reserved.