| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for modifying an existing blackboard into a multi-functional board by a simple method, to enhance utility value of the blackboard by a new function which the existing blackboard the white board or the like does not have without being accompanied by special increase in cost for modification. SOLUTION: A multi-purpose main board 1 to be used for three functions such as a choke board, a marker board and a screen is fixed on the existing blackboard or the like, and a sub-board 7 which has a width narrower than that of the main board 1, can be moved in the horizontal direction to the main board 1, can be used by moving it at an arbitrary position on the main board 1 when it is used, and is equipped with one or a plurality of functions among the blackboard, the white board, the screen, an electronic board and a notice board, is arranged at the front of the main board 1. COPYRIGHT: (C)2009,JPO&INPIT
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