Panel unit of dealing board

A panel unit of a dealing board, comprising:

• a display,
• a keyboard unit, arranged on an upper surface of said display and having a plurality of buttons,
• wherein said display is divided into individual indication which respectively display function names corresponding to said plurality of buttons,
• said keyboard unit comprises a printed substrate arranged on said display and having fixed contacts, which form switches, provided for respective buttons,
• an electric conductive contact rubber located on said printed substrate and provided with moving contacts opposing to said fixed contacts and a panel which is positioned on said electric conductive contact rubber and provided with said plurality of buttons,
• a plurality of holes are formed in said panel, said buttons are fitted into said plurality of holes to be vertically movable so that the fixed contacts of said printed substrate come in contact with the movable contacts of said electric conductive contact rubber while being kept in contact with said electric conductive contact rubber, said buttons are respectively provided with an engagement portion which prevents the buttons themselves from coming off from said panel,
• a relief hole in which said button is fitted when the engagement portion holds down said button is formed in said electric conductive contact rubber and said printed substrate, respectively, and said electric conductive contact rubber and said printed substrate are provided with a through hole for making said individual indication corresponding to said buttons visible.