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mechanical keys are still used in a very wide range and they have more or less the same structure. there have also been some accessories to make them ergonomic and user friendly. non have made a huge success and most of them are failures. we've tried to make keys and door locks as ergonomic as possible without making huge changes in production and materials or making it expensive. the way our wrist bends while opening a door, how the thumb and the index finger holds the key, the key hole and ring that holds all keys, mistkaes of holding the key upside down,difficulty on finding the lock hole,etc are some of the issues considered in this desig
Iran University of Science and Thechnology