| 摘要 |
PROBLEM TO BE SOLVED: To satisfactorily brighten characters, etc., while simply, easily and exactly arranging a light transmitting body to fit light from a light source transmit the body to brighten the characters, etc. SOLUTION: The light transmitting body 2 is arranged on the back of an operation sheet 1 on which the characters, etc., instructing the contents of operation are formed. This operation unit brightens the characters, etc., by irradiating the light from the light source 3 on the characters 6, etc., on the operation sheet 1 through the light transmitting body 2. The operation unit is linked at a linkage part 4 to arrange the adjacent light transmitting bodies 2, 4 on the same plane.
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