A simple mechanical mechanism that reminds of the lock using two illustrations appearing on the key
A simple mechanical mechanism designed for a key, reminding of the lock using two illustrations appearing on the key (lock - displayed by a green lock, and unlock - displayed by a red lock). A metal ball, which is part of the mechanism, is positioned between these two illustrations. When the key is inserted into the lock hole and the door is locked, the ball moves to the locked side.
Otherwise, it remains on the open side. This prominent display allows easy observation of whether the door is locked, making the key very user-friendly for both children and adults. Client: Yoav Krochmal.