| 摘要 |
PROBLEM TO BE SOLVED: To enhance convenience and facilitate management. SOLUTION: The opening/closing device for bringing about moving motions of a prescribed opening/closing body, which is provided with a counting display means for displaying the number of the moving motions, is constituted so that a position for arranging the counting display means can be dynamically changed. In this case, the counting display means, which functions electrically by having a built-in battery, is preferably provided with: a battery drain detecting part for detecting the drain of the battery; a number display part which has a display function for displaying the number of the moving motions; and a display control part for displaying the drain of the battery by using the display function, when the battery drain detecting part detects the drain of the battery. |
