| 摘要 |
PROBLEM TO BE SOLVED: To easily adjust the height of a foot rest, and at the same time, increase the supporting strength for a rotary chair for which the foot rest is provided. SOLUTION: At the center of a leg body 5, a supporting cylinder 6 on the outer periphery of which, a male thread is formed is erected. Then, the boss section 11 of the foot rest 4 is screwed with the supporting cylinder 6. A leg post 7 to support a seat body 2 is fitted in the supporting cylinder 6. The foot rest 4 can be regulated at an optional height by rotating it. |
