| 摘要 |
PROBLEM TO BE SOLVED: To provide structure where when a ventilation fan for a duct is embedded in a ceiling, a mounting work is facilitated, to suppress a product cost, and to be supplied to a market at a low cost. SOLUTION: Disassembling is effected by decreasing the diameter of a body fixing hole to a value lower than the diameter of a screw for fixing a body. Further, disassembly is executed by forming the hole part for fixing a body in an oblong hole. Furthermore, disassembly is performed by forming the hole part for fixing a body in a cross-shaped hole. Moreover, a plurality of body fixing hole parts are formed in a recess part shape and disassembly is effected by forming a hole for fixing a body in the recess part. Further, disassembly is performed by forming a rib on the outer periphery of the body fixing hole part. |
