| 摘要 |
PROBLEM TO BE SOLVED: To secure the intermediate door of distribution board by easy operation through a simple structure. SOLUTION: An intermediate door 5 is supported by a cover stand 1 and secured by means of a knob 3 and a knob base 2. The knob 3 comprises a locking part 15 and a fitting part 14 and the base 2 is provided with a part 10 engaging the cover stand 1 and and a knob lock receiving part 12. The cover stand 1 is engaged with the engaging part 10 and the fitting part 14 of knob 3 is fitted the knob lock receiving part 12 of base 2. Operating part 4 of the knob 3 is then projected through an opening 16 of the intermediate door 5 and turned before being secured in place. |
