| 摘要 |
The lumbar support for a seat backrest according to the invention has a lumbar pad and a toggle linkage to adjust the position of the lumbar pad. Furthermore, it comprises a motor with a spindle and a nut, wherein the motor rotates the spindle to move the nut along the spindle and wherein the nut is coupled to the toggle linkage, which includes an arm member which is pivotably connected to a frame and bears the lumbar pad and a link coupled to the nut and the arm member.
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