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Case Study · 2025

Chopstick Ring

A finger-worn chopstick that flips from an eating utensil to a flat fold against your fingers in one motion — so you can eat lunch at your desk without getting food on your hands or your keyboard.

Role
Design & build
Tools
CAD, 3D printing
Parts
6-piece assembly

The problem

Eating lunch at a desk usually means a trade-off: eat with your hands and risk leaving food residue on your keyboard, or set your work aside entirely. Neither option is great when you're trying to get through the day without a break in focus — or in your meal.

The design

The Chopstick Ring lives on two fingers. A pivoting arm swings down into an eating position when you need it, then folds back flat against your hand when you don't — clean, out of the way, and always within reach. I worked through the geometry in CAD, dimensioned a six-part assembly, then 3D printed and hand-assembled the prototype with metal pins and rings.

Two positions, one hinge

The whole design comes down to a single pivot. Rotate the arm one way and it's a utensil; rotate it back and it's out of your way.

The Chopstick Ring pivoted down into its eating position
Eating mode

Pivot the arm down and the two halves meet at an angle you can pinch food with — just like a normal pair of chopsticks, except they never leave your hand.

The Chopstick Ring opened flat into its resting position
Typing mode

Swing the arm back flat against your fingers and a pair of small embedded magnets click into place, holding it snug against your hand so it stays put — out of the way and ready — while you type.

Anatomy

Tap a label to open its drawing

Every part below was modeled and dimensioned to scale before it was printed. Click any arrow — or its label — to pop open that part's fully dimensioned CAD sheet, with a short note on what it actually does.

3D rendered CAD model of the Chopstick Ring with its parts called out

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