| 摘要 |
PURPOSE:To improve the supporting rigidity of a turn block through good fittingness, by supporting the turn block with even the fittingness between a fitting member and a holder at an ordinary position and a rotary facing position of a seat, while forming a fitting part of the fitting member into an eccentric cam form. CONSTITUTION:A turn block 4 is rotatably supported on a support block 1 through engagement between each rail pat 3 and support hooks 9-11. In addition, a cushion frame 21 supporting a seat cushion 30 is attached to the turn block 4 so as to make a front part 20a liftable upward. At the above-mentioned, on the support block 1, plural holders 12-15 are tightly attached to a position on a concentric circle with the rail part 3 at the specified interval. On the other hand, fitting members 16-19 to be fitted each in each of these fitting members 16-19 are tightly attached to a lower surface of each of side plates 6 and 7 of the turn block 4. Then, a fitting part of each so these fitting members 16-19 is formed into an eccentric cam form, whereby fittingness is smoothly carried out with no clearance.
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