| 摘要 |
PURPOSE:To obtain a sure motion seat frame lift mechanism of a simple structure with which a seat portion loaded on the seat frame can be moved horizontally and upped and downed simultaneously at its forward and backward portions by using a parallel link mechanism. CONSTITUTION:A forward and backward parallel link 5 and 5A are provided in a groove-shaped left side member 2. The lower end of the forward parallel link 5 is supported by a bearing 7 attached to a fixing bracket 3a of a slide rail 3 and its upper and is supported by a bearing 7A attached to a fixing bracket 2a at the lower part of the left side member 2. The upper end of the forward parallel link 5 is supported by a bearing 7B at one end of an operation link 8. A supporting part 25 is fixed to the inner side of the forward portion of the left side member and a female screw part 10 is provided to its forward inner side in a manner capable of sliding. The one end of the female screw is fixed to the support part 25 in a manner capable of rotating for a shaft 9 with a male screw to be inserted into it. A shaft pin 7C is provided onto the periphery of the female screw 10, for the one end of the operation link 8 to be fixed in a rotatable manner, and an operation handle 11 gets fixed to the male screw 9. |
