| 摘要 |
<P>PROBLEM TO BE SOLVED: To eliminate gaps at four corners of a main body of a lighting device while securing safety and enhance strength of the main body and prevent dents of the main body being generated while improving the outward appearance. <P>SOLUTION: A swelled part 5 for incorporating a component positioned almost center of a main body 2 of a device formed of rectangular steel plate and disposed on a ceiling inside a room in a house etc. and a swelled part 6 for guide positioned at four corners of the main body 2 are integrally formed by heretofore known drawing processing. An outer periphery part 7 of the main body 2 is bent by executing a process of edge cutting after executing the process of the drawing processing. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
