| 摘要 |
PROBLEM TO BE SOLVED: To enable to replace easily with a spare key member when the key member is broken in a single action dial part provided at the control panel of an image forming apparatus. SOLUTION: In the single action dial part 20, many single action keys 27 are arranged with a prescribed arrangement spacing, and are placed in corresponding addresses displayed on the panel 30. Since the key member 40 is constructed of a resin material, it is housed in an installation block 23 between rib members 22 hung below the main body cover 21 with a prescribed spacing. When one key member is broken, a spare key member is installed, and thereby easily replaced, and the action of the single action dial part can be demonstrated without any trouble. COPYRIGHT: (C)2004,JPO
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