The Roles of Shape and Size in the Pinch Effort of Screw Knobs

Author:

Ng Poh Kiat1,Boon Qiao Hui1,Chai Ka Xuan1,Leh Shiong Lung1,Bee Meng Chauw1,Saptari Adi2

Affiliation:

1. Multimedia University

2. Universiti Teknikal Malaysia Melaka

Abstract

The most common body parts that sustain injuries at the workplace are the hands and fingers. In association to this, researchers have conducted various studies on grip span, forces, postures, contact area and strength. However, it appears that limited studies have been done on the design of screw knobs of ergonomic shapes and sizes for pinch grip activities. Thus, the aim of this study is to design, develop and assess screw knobs of ergonomic shapes and sizes for pinching activities. Several designs of screw knobs were designed and fabricated. The assessment of the knobs involved workers from a manufacturing firm. The ratings on the efforts to pinch and turn the knobs were collected using surveys and analyzed with reliability and descriptive and analyses. The results show that the workers mostly preferred using the small 5-lobes knob. However, the large ball knob was the least preferred knob to be used. The findings of this study can be used to create design guidelines on knob shapes and sizes to develop safer, more ergonomic and efficient knobs.

Publisher

Trans Tech Publications, Ltd.

Reference26 articles.

1. Information on http: /www. gloveuniversity. com/regulations/handinjuries. php.

2. Information on http: /www. shocktek. com/OccupationalHandInjuries. pdf.

3. Information on http: /www. partsbrush. com/ergonomic-brushes.

4. Information on http: /ergonomics. about. com/od/buyingg4/fr/papercut_2. htm.

5. Information on http: /www. trulyergonomic. com/store/index. php.

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Appropriate Operating Force of Knob in Certain Conditions;Advances in Usability, User Experience and Assistive Technology;2018-06-28

2. The Effects of Different Tactile Sensations on Pinch Effort;Applied Mechanics and Materials;2013-12

3. Applying Clockwise and Counterclockwise Torque Directions in Pinch Grips: A Descriptive Study;Applied Mechanics and Materials;2013-12

4. Pinch Techniques and their Effects on Pinch Effort: A Pilot Study;Applied Mechanics and Materials;2013-12

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