Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:


Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Accurate Ruler / Ruler

Accurate Ruler
Accurate Ruler

The ruler is a tool that can draw lines with a line length accurate to millimeters. The ruler includes a rack, which can be moved, and a brush is arranged under the rack. The working principle of the ruler is: through the cooperation between the rack and the two spur gears with different modules inside the ruler body, and the different gear sizes and radii determined by different modules, resulting in different perimeters, which separates CM and MM, that can be accurate to the millimeter. By dividing the two gears evenly, the CM dial will dial one centimeter, and the millimeter dial will do the same. Fnally, it like a elephant.


Chengdu University Of Technology

Chengdu University Of Technology
Chengdu, China

hao chen,
Chengdu University Of Technology