Keyboard device and information apparatus system

An information apparatus system, comprising:

• an information apparatus having a capacitive touch screen that displays a screen keyboard composed of a plurality of keys;
• and
• a keyboard device placed on the touch screen for providing an input to the screen keyboard, wherein
• the keyboard device has:
• a plurality of conductive keycaps;
• scissors mechanisms respectively provided directly beneath the each of the plurality of keycaps and configured to support each keycap to be vertically movable;
• an insulating support plate having respective through holes directly beneath each of the plurality of keycaps and configured to support each scissors mechanism on an upper surface side;
• rubber domes respectively provided between each of the plurality of keycaps and the support plate, and having a conductive contact portion contacting each keycap, and a conductive pressing portion being in electrical connection with the contact portion and passing through the through hole when the keycap is pressed;
• and
• a plurality of conductive pads provided on a lower surface side of the support plate to cover the respective through holes in a state in which adjacent conductive pads are isolated from each other, and that are respectively able to be in electrical connection with each of the plurality of keys of the screen keyboard.

A keyboard device for providing an input to a screen keyboard that displays a plurality of keys on a capacitive touch screen, the device comprising:

• a plurality of conductive keycaps;
• scissors mechanisms respectively provided directly beneath each of the plurality of keycaps and configured to support each keycap to be vertically movable;
• an insulating support plate having respective through holes directly beneath each of the plurality of keycaps and configured to support each scissors mechanism on an upper surface side;
• a plurality of rubber domes, each having a conductive contact portion capable of contacting the keycap, a conductive pressing portion being in electrical connection with the contact portion and passing through the through hole when the keycap is pressed, and a leg portion standing upright on the upper surface side of the support plate, in which the contact portion and the pressing portion are formed of a conductive material, and the leg portion is formed of a non-conductive rubber material;
• and
• a plurality of conductive pads provided on a lower surface side of the support plate to cover the respective through holes in a state in which adjacent conductive pads are isolated from each other, and that are respectively able to be in electrical connection with each of the plurality of keys of the screen keyboard.

An information apparatus system, comprising:

• an information apparatus having a capacitive touch screen capable of that displays a screen keyboard composed of a plurality of keys;
• and
• a keyboard device placed on the touch screen and providing an input to the screen keyboard, wherein
• the keyboard device has:
• a plurality of conductive keycaps;
• scissors mechanisms respectively provided directly beneath each of the plurality keycaps and configured to support the keycap to be vertically movable;
• an insulating support plate having respective through holes directly beneath each of the plurality of keycaps and configured to support each scissors mechanism on an upper surface side;
• a plurality of rubber domes, each having a conductive contact portion capable of contacting the keycap, a conductive pressing portion being in electrical connection with the contact portion and passing through the through hole when the keycap is pressed, and a leg portion standing upright on the upper surface side of the support plate, in which the contact portion and the pressing portion are formed of a conductive material, and the leg portion is formed of a non-conductive rubber material;
• and
• a plurality of conductive pads provided on a lower surface side of the support plate to cover the respective through holes in a state in which adjacent conductive pads are isolated from each other, and that are respectively able to be in electrical connection with the respective keys of the screen keyboard.