UNDERLAY-BOARD-EQUIPPED INPUT DEVICE

摘要

An underlay-board-equipped input device is provided which is capable of preventing positional displacement of a writing paper sheet when a user is writing on the set writing paper sheet and when the writing paper sheet is set again. An underlay board is mounted to the back surface of a rectangular frame-shaped input device having a rectangular hollow input-use interior pivotably about one end edge of the input device. The input device includes a rectangular frame-shaped optical waveguide having the hollow input-use interior. A means for positioning a writing paper sheet (such as protrusions) is provided on the front surface of the underlay board. The front surface of the underlay board and the back surface of the input device are configured to form a holding part for holding the writing paper sheet therebetween.