Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Analysis of Frequency Characteristics of Writing Instruments Due to Friction

필기구 마찰의 주파수 특성 분석

  • Shin, JaeUn (Graduate School, Dept. of Mechanical Engineering, SungKyunKwan University) ;
  • Park, JinHwak (Graduate School, Dept. of Mechanical Engineering, SungKyunKwan University) ;
  • Lee, YoungZe (Dept. of Mechanical Engineering, SungKyunKwan University)
  • 신재운 (성균관대학교 대학원 기계공학과) ;
  • 박진확 (성균관대학교 대학원 기계공학과) ;
  • 이영제 (성균관대학교 기계공학과)
  • Received : 2017.06.12
  • Accepted : 2017.08.04
  • Published : 2017.08.31
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Abstract

The feel of writing is important to customers when they buy smart devices with stylus such as smartphones and tablet computers. With an aim to reproduce the tactile sensibility of writing instruments when people write on the glass display using a stylus, this study focuses on the frequency characteristics of writing instruments that can describe the vibrations of writing instruments sliding over counter surfaces. In addition, this study includes the effect of various factors influencing the friction of writing instruments such as lubricant, nib material, and contact type. We perform sliding experiments with six types of writing instruments and a sheet of paper to understand the relation between the friction conditions of the nib and the frequency characteristics. As this research focuses on the tactile perception of human skin when people use a writing instrument, the analysis of frequency characteristics is performed in the perceptible frequency range of mechanoreceptors in the human skin. As a result, three types of frequency characteristics are identified. Low frequency peaks are observed for a metal nib with ink; high frequency peaks are observed for a nib without ink; and, middle frequency peaks with a wide range of distribution occurs for fabric nibs with ink. Therefore, to implement the proper feel of writing, at least three types of vibrations have to be made.

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References

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