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This paper presents a cylindrical box-shaped souvenir with dimensions of ∅80x30mm, fabricated using polylactic acid (PLA) material on a 3D printer. The box employs an iris mechanism, where the petals function as a lid. Rotating the upper ring causes the petals to open, revealing the interior. A flat spiral torsion spring, housed within the box, provides the potential energy required for closure. The paper will compare the analytically calculated bending stress in the spring, derived from existing literature, with the stress obtained through finite element analysis (FEA).

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A Spiral Torsion Spring as a Power Source for a Kinetic Souvenir Box

  • 会议论文

  • 发表日期：

    2025年

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  • Žiga Alma

摘要

This paper presents a cylindrical box-shaped souvenir with dimensions of ∅80x30mm, fabricated using polylactic acid (PLA) material on a 3D printer. The box employs an iris mechanism, where the petals function as a lid. Rotating the upper ring causes the petals to open, revealing the interior. A flat spiral torsion spring, housed within the box, provides the potential energy required for closure. The paper will compare the analytically calculated bending stress in the spring, derived from existing literature, with the stress obtained through finite element analysis (FEA).