| 摘要 |
A key comprising: a key shaft (110) having its first wide side (118A) in a first color and its second side (118B) in a second color, and further equipped with a pin (112); and a key head (120), having its first wide side (128A) in a first color, and its second side (128B) in a second color, that is inserted into the pin thereby being capable of rotation with respect to the key shaft. The key shaft is further equipped with a limiter (114) that limits the rotation of the key head with respect of the key shaft to 180°. For example, identical colors indicate a lock position, while when not identical indicating the unlocked position. Key head rotation is enabled only once the lock or unlock position of the lock device has reached. In another embodiment the position of the key shaft versus the key, allowing a ninety degree rotation provides the desired indication.
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