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The traditional key ring is compact which is not easy for breaking. Our "Easy-in Key Ring" has smart construction : a small lock with a spring. Firstly, it is easy for people to insert a key compared with the traditional one. Secondly the spring will push the lock back and closet the ring automatically to keep the internal keys safe.
This key ring uses a telescopic bayonet lock.
You can push the lock and easily insert the key from the outside gap. Once you insert the key, the lock will closet automatically. However, the internal keys will not fall out of the complete circle ring.
Zhejiang University
Ningbo, China
Zhejiang University
Ningbo, China
Jin Ge
Leijing Zhou
Huifei Bao
Danping Shen