Evaluation of Kinematic Characteristics of the Foot Thumb for the Development of a New Input Device

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  • TANAKA Noriko
    Graduate School of Information Science, Nara Institute of Science and Technology
  • UEDA Tomoo
    Graduate School of Information Science, Nara Institute of Science and Technology
  • NAKAO Megumi
    Graduate School of Information Science, Nara Institute of Science and Technology
  • SATO Tetsuo
    Graduate School of Information Science, Nara Institute of Science and Technology
  • MINATO Kotaro
    Graduate School of Information Science, Nara Institute of Science and Technology
  • YOSHIDA Masaki
    Department of Biomedical Engineering, Osaka Electro-Communication University
  • KOUKETSU Kazumi
    TEC GIHAN CO., LTD

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Other Title
  • 足指マウス開発にむけての基礎的検討―母指の運動特性―
  • ソクシ マウス カイハツ ニ ムケテ ノ キソテキ ケントウ ボシ ノ ウンドウ トクセイ

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The kinematic characteristics of the foot thumb were evaluated in order to develop a new input device; the “Foot Mouse.” Seven healthy subjects pushed a sensor button placed under the right-foot thumb and three components of the pressure were measured by the sensor. The subjects were requested to push the button in five directions applying three kinds of effort each. The maximum value among the lateral, anterior and posterior pressures was about 3.5 kgf and the maximum downward pressure force was about 19.2 kgf. The objective direction of recording pressure was different from the direction of the user's intention. Large downward pressure was observed in every task. Moreover, there were significant variations in kinematic characteristics between individuals. A dedicated transformation process for these objective pressure components should be designed for the interface of the “Foot Mouse.”

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