| 摘要 |
PURPOSE: A seat-back gradient control device is provided to control a gradient of a seat-back conveniently and to improve value of goods by controlling tension of several S-springs. CONSTITUTION: A device for controlling gradient of seat-back comprises working parts(10a,10b) installed for controlling space between a pipe frame for fixing and a pipe frame for moving; motors(30a,30b) driving the working part; and cables(20a,20b) delivering turning force of the motor to the working part. The interval between both frames is controlled by moving the movable pipe frame after the turning force occurred from driving of both motors are delivered to the working part through the cable. The gradient of a seat-back is controlled by controlling tension of several S-springs governed by controlling space between both frames.
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