| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a luminaire capable of preventing a screw or the like from damaging by fastening an apparatus body and an arm supporting the apparatus body at a predetermined angle while detecting a fastening state between the body and the arm. <P>SOLUTION: When an illumination angle is adjusted and fixed by changing an angle at which the apparatus body 30 is attached to an arm 22, a multi-stage adjusting mechanism 43 fitted between the apparatus body 30 and the arm 22 performs fastening. In the multi-stage adjusting mechanism 43, fastening force meets an inflection point when fastening force capable of temporary retaining is obtained, then the fastening force suddenly rises, thus operation force to the multi-stage adjusting mechanism 43 rises suddenly, the time of temporary retaining can be easily detected. And also, when the apparatus body 30 is made to rotate to the arm 22 by weakening the fastening force, since operation force is suddenly decreased at the time of being temporary retaining state by reducing fastening force by the multi-stage adjusting mechanism 43 so as to enable to detect the temporary retaining state easily, therefore, the apparatus body 30 can be prevented from rotating due to excessive weakening of the fastening force. <P>COPYRIGHT: (C)2011,JPO&INPIT |
