Button-key structure and electric device having the same

A button-key structure, comprising:

• a first button-key arranged to be pushed in a first moving direction;
• a second button-key arranged adjacent to the first button-key to be movable in the first moving direction;
• a sliding rib disposed on at least one of the first button-key and the second button-key on a downstream side in the first moving direction;
• a button-key supporting portion disposed on the downstream side of the first button-key and the second button-key in the first moving direction, said button-key supporting portion including a separation wall disposed between the first button-key and the second button-key, said separation wall extending in the first moving direction, said button-key supporting portion further including a through hole facing at least one of the button-keys and a pushup arm disposed in the through hole for pushing up the one of the button-keys;
• and
• a button guide having a surface substantially parallel to the sliding rib and disposed to slidably engage with the sliding rib and an inner wall of each of the button-keys,
• wherein said guide portion is formed to have a length smaller than a length of each of the button-keys from a finger contact surface thereof to a contact portion thereof with the pushup arm, and
• said button-keys are arranged away from each other with a specific space in between at an upper portion thereof.