| 摘要 |
<p>PURPOSE:To adjust the upper limit position of an astral lamp by providing a positionally adjustable stopper at a joint section to rotatably support the lamp, so as to be vertically shiftable for restricting the upper limit position of the lamp. CONSTITUTION:An arm 2 has an astral lamp at the end thereof, and this lamp is movingly supported on a plurality of arms 2 and 3. The arms 2 and 3 are connected to each other via a joint mechanism 10, thereby arbitrarily moving the lamp to a desired position. The joint mechanism 10 supporting the lamp rotatably in a vertical direction has a stopper 12 and a stopper rest 13 for restricting the motion of the arms 2 and 3 beyond the predetermined vertical direction. In this case, the stopper 12 is screwed to one of tap holes 12a, 12b and 12c, and the selection thereof restricts the upper limit position of the lamp.</p> |
