| 摘要 |
PURPOSE:To improve the working efficiency of a keyboard by providing a memo material and a covering mask sheet member for each one of push-buttons showing plural functions and covering all display memos excluding just one memo. CONSTITUTION:Each button 2 of many push-button switches forming a part of a keyboard 1 has plural types of functions respectively. A flexible memo sheet where a function display memory group 6 is printed for each button 2 is provided on a dust cover 4 covering the entire surface of a group of those button 2 as a function display memo material 5. This material 5 is covered with a covering mask sheet member 7 to which the masking blind frames 8a are scattered. Furthermore, the fringe part of the member 7 is welded to a slide frame 10. For instance, the first half area of a push-button 2 is used for menu display in the daytime with the second half area used at night respectively. These areas are covered with the member 7 for switch of display modes.
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