Keyboard apparatus and key guiding method

A key guiding method, adapted for a keyboard apparatus, the keyboard apparatus comprising a key displaced about a key axis and having a cavity opening downward formed therein, and a guide member having a guide inserted into the cavity of the key and guiding displacement of the key by contact between a guided surface of the key and the guide, wherein

• the key comprises a stopper formed within the cavity,
• the stopper comprises a base connected to the key and extending downward, and a hook formed on a lower end side of the base and displaced in a position vertically side by side with the key axis,
• the guide comprises a recess formed on a rear surface of the guide, the hook being inserted into the recess, and
• the displacement of the key is guided by the guided surface formed in a position overlapping the hook or a position vertically side by side with the hook in a left-right view of the key.