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Doorknob Guardian / Doorknob

Doorknob Guardian

when single women is at home, only herself, it is often that they will be frightened by the noise outside, thinking maybe it is the robber or thief; and at the same time, they don’t dare to say anything and they are afraid of giving the single statue information out. Thus, the installation of this door handle shall solve this problem. There is a button in the front section of this Doorknob Guardian, when it is pressed, speaker at the bottom of this Doorknob Guardian will play the recorded rugged male voice “Who is there?”, which can scare the outside unwelcoming visitor, and at the same time bring the sense of security into female’s mind.


Jiangnan University

Jiangnan University
Wuxi, China


Jiangnan University

Jiangnan University
Wuxi, China

Wu zhenyi