One-Handed Ruler

With this ruler, not only people with a disability in one hand or an injured hand, but anyone can draw a straight line in a notebook using just one hand. In addition, because the ruler is aligned with the edge of the notebook, parallel and perpendicular lines relative to the notebook can be drawn easily. It is designed so that people with a disability in one hand can use a ruler independently, and so that using a ruler becomes enjoyable.

[3D Printed Self-Help Device Design Contest 2024 Passed First Round of Selection] Entry details: https://fabble.cc/ictrehabilitationresearchlab/jougi