ATTENDANCE STATE DISPLAY UNIT

PROBLEM TO BE SOLVED: To provide an attendance state display unit that is easy to be operated and never has display characters damaged even when used for long time.SOLUTION: An attendance display unit consists of a guide plate 2, first and second slide plates 3, 4, and a cover 5. The guide plate has a vertical wall formed at both long sides of a rectangular plate, and also has two recessed grooves each formed on opposite wall side faces. The cover covers an upper surface and four circumferential surfaces of the guide plate with a lower surface open, and thus form a rectangular opening window close to one short-side wall. The first and second slide plates have both edges fitted in opposite recessed grooves to form a rectangle which is 1/2 to 2/3 time as long as a longer side of the guide plate, and a first slide plate and second slide plate have both sides fitted into the recessed grooves at sides close to and recessed grooves at sides far from a guide plate inner surface, respectively, and slid to move. At a rectangular opening window-side edge of the first slide plate, a wall-like projection is formed which projects from the rectangular opening window. On the side part of the second slide plate at the opposite side from the rectangular opening window, a columnar projection is formed, and the cover has a slit-like opening window formed which allows the columnar projection to pass through when the second slide plate is slid.SELECTED DRAWING: Figure 1 【課題】操作が容易で長く使用しても表示文字が傷つかない在席状況表示器を提供する。【解決手段】ガイド板２と第１、第２のスライド板３，４とカバー５とで構成する。ガイド板は長方形板の両側長辺に垂直壁を形成し、対向する壁側面に各２本の凹状溝を形成する。カバーはガイド板の上面、周囲４面を覆い下面開放形状とし、片側短辺壁に近接した長方形開口窓を形成する。第１、第２のスライド板は対向する凹状溝に両縁が嵌まり、ガイド板の長手方向の１／２乃至２／３の長さの長方形とし、第１のスライド板はガイド板内面に近い側、第２のスライド板は遠い側の凹状溝に両側を嵌めてスライド移動させる。第１のスライド板の長方形開口窓側辺縁には長方形開口窓から突出する壁状突起を形成する。第２のスライド板の長方形開口窓とは反対側辺部には柱状突起を形成し、カバーには第２のスライド板をスライドさせたときに柱状突起を通すスリット状開口窓を形成する。【選択図】図１