Fanuc Corporation

Kazuhiko Hirano

Kazuyuki Sasaki

Yutaka Muraoka

A key switch structure is provided with a key switch located in a position corresponding to a keyhole, a key top, and a key sheet disposed between the key switch and the key top. An embossed portion recessed inwardly relative to a case body is formed on the key sheet in a state where the key sheet is pressed down by a pressing protuberance of the key top not depressed, and tip corner parts of the pressing protuberance contact the formed embossed portion. Thus, the key top can be naturally positioned in the center position of the keyhole.

Key switch structure

A fan motor is mounted on the upper wall of the casing. The lower surface of this upper wall is formed into an inclined surface in which inclination is formed from the front wall side of the casing toward a back wall across from the front wall. When the fan motor is driven, oil mist or moisture contained in the air are condensed into water droplets or oil droplets. These water droplets or oil droplets fall and flow to the inner wall surface of the upper wall of the casing along the inner peripheral wall of a vent hole. Then the water droplets or oil droplets flow along the profile line of a vent hole smoothly (without stopping) and roll down the side wall of the casing.

Casing structure for electronic equipment

A numerical control device comprises a box structure, a board unit housed inside the box structure, a wire distribution board disposed on the rear surface of the box structure, and a fan unit detachably mounted to the top surface of the box structure. The fan unit has a fan motor inside. A first connector wired from a power supply terminal is secured to the box structure while a second connector wired from a fan motor is secured to the fan unit at a position opposite the first connector secured to the box structure. Thus, the second connector can be connected to and removed from the first connector.

Growing community of inventors

Yamanashi, Japan

Kazuhiko Hirano