ROBOT_HAND_FINGER

Reference video：　　https://www.youtube.com/watch?v=e7L8_lw6N8U

●Simple Humanoid Robot Finger
This is a simple humanoid robot finger designed for 3D printing.
It uses fishing line and a rubber band to mimic human finger tendon movement, making it ideal for learning the basics of robot hands.

〇Parts Required (per finger)
・3D printed parts　 ×4
・M3 countersunk screw (12mm) 　×3
・Fishing line (≤ No.8) 　×1
・Rubber band No.18 　×1

〇Features
・Tendon-driven structure using fishing line
・Natural bending order: 3rd → 2nd → 1st joint
・Rubber band provides return force
・Simple structure, easy to assemble

〇Assembly Notes
・Tighten screws to adjust bending sequence
・Designed for FDM (FFF) 3D printers

〇Use Case
・Beginner humanoid robotics
・Educational projects
・Robot hand mechanism study

〇Structural Features
・The fishing line is designed to represent the tendons of a human finger.
・By pulling the fishing line, you can observe the finger bending in a natural sequential order.
・A rubber band provides a return force, allowing the finger to return to its original position when the tension is released.

This structure helps users understand the relationship between human finger motion and mechanical design.