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Now the concept add the password lock into umbrella. If you want to open umbrella, you need to turn lock to the right password, and then press the switch to open it. While entering the wrong password,it can not be opened; Even being stolen, it is also very difficult to open immediately, which can reduce the stolen probability effectively. When the burglar breaks the lock, it is equivalent to destroy the handle to grip!
National Chiao Tung University
Hsinchu, Taiwan
National Chiao Tung University
Hsinchu, Taiwan
Che-Jung Chang
Ni-Feng Liu