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Cloud-reminder / key

Cloud-reminder
Cloud-reminder

This is a key designed to help owners check whether the door has been locked or not. There is a cloud-shape memory sponge inserted in the key. After using the key to lock the door, memory sponge would deform, preserving fingerprints on as a sign. When the user forgets whether he had locked the door , he can check if the fingerprint can be seen.

University

Hunan University

Hunan University
Changsha, China

Fangqing Liu,
Hunan University

Yi Wu,
Hunan University

He Wang,
Hunan University

Deng Peng,
Hunan University