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Elastic ruler / Office stationery-Ruler

Elastic ruler
Elastic ruler

When drawing a line by using a ordinary ruler. Sometimes the ruler would be moved,so that the line will be blurred. By insetting a resilient metal piece. at the end of the ruler. This problem can be solve.
By pressing it’s end with the metal piece, the ruler can be use regularly. By impressing it, the ruler bounces. There would not be any tracing.

University

Guangzhou College of South China University of Technology

Guangzhou College of South China University of Technology
Guangzhou, China

Shanshan WEI,
Guangzhou College of South China University of Technology

Jiahe LIANG,
Guangzhou College of South China University of Technology

Zili XU,
Guangzhou College of South China University of Technology