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<p>Soft robotic grippers offer adaptable and safe manipulation across diverse objects, but they often lack the output force and stability of rigid grippers. Developing fingers that deliver high force while delicately handling small or fragile objects remains a key challenge. Here, we design a humanoid finger with a rigid-flexible-soft structure, composed of rigid tubular bones, flexible joint springs with automatic reset and resistance to deformation under external forces, and a soft silicone skin. A pneumatic membrane actuator is placed between the bones and skin. To test its performance, we build various grippers using the proposed humanoid fingers and conduct experiments such as grasping tofu, pinching 0.1 mm paper, holding a 23.2 cm basketball, and supporting 5.275 kg weights. Our humanoid finger broadens the applications for rigid-flexible-soft robots.</p>

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Humanoid finger with rigid-flexible-soft structure

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月12日

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  • Boyang Lyu,
  • Huai Xiao,
  • Qingxin Meng,
  • Jundong Wu,
  • Yawu Wang,
  • Jinhua She,
  • Edwardo F. Fukushima

摘要

Soft robotic grippers offer adaptable and safe manipulation across diverse objects, but they often lack the output force and stability of rigid grippers. Developing fingers that deliver high force while delicately handling small or fragile objects remains a key challenge. Here, we design a humanoid finger with a rigid-flexible-soft structure, composed of rigid tubular bones, flexible joint springs with automatic reset and resistance to deformation under external forces, and a soft silicone skin. A pneumatic membrane actuator is placed between the bones and skin. To test its performance, we build various grippers using the proposed humanoid fingers and conduct experiments such as grasping tofu, pinching 0.1 mm paper, holding a 23.2 cm basketball, and supporting 5.275 kg weights. Our humanoid finger broadens the applications for rigid-flexible-soft robots.