A backrest frame assembly

Abstract

The invention relates to a backrest framework assembly. The backrest framework assembly comprises a frame, an adjusting mechanism and a motor, wherein an electric angle adjuster is arranged on one side of the frame; the adjusting mechanism connected with the electric angle adjuster is mounted on the other side of the frame; and a motor used for driving the electric angle adjuster is installed on the frame. The adjusting mechanism comprises a lower connecting plate, an eccentric transmission shaft, an idle stroke conversion bushing and a synchronous rod; wherein the lower connecting plate is rotatably mounted on the frame, the eccentric transmission shaft is rotatably mounted on the lower connecting plate, the idle stroke conversion bushing is mounted on the eccentric transmission shaft, and the synchronous rod driven by the motor is inserted into the idle stroke conversion bushing to be mounted and connected with the electric angle adjuster. According to the backrest framework assembly, the adjusting mechanism is provided to achieve rotation and revolution of the electric recliner, and the purpose that the angle of the backrest can be adjusted only by arranging the electric recliner on one side is achieved.

Description

technical field [0001] The invention relates to a car seat, more particularly to a backrest frame assembly. Background technique [0002] Electric seats can improve the comfort and sense of technology of the vehicle, and the full electricization of seats has become a future development trend. At present, most electric recliners are differential gear planetary gear train structures, such as Figure 11 As shown, its features include: the inner tooth Z1 is rotating (autorotation) around its own circle center O1, and at the same time, the inner tooth Z1 is also rotating (revolving) around the circle center O2 of the outer tooth Z2, and the circle center O1 of the inner tooth Z1 and the outer tooth The center O2 of Z2 has an eccentricity A. It is precisely because of the addition of rotation and revolution that the complex motion trajectory of the electric recliner 201 is as follows: Figure 12 As shown, this is also the trajectory of the backrest. This kind of complicated mot...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art that the two sides of the seat back need to be respectively provided with eccentric recliners and the cost is relatively high, the present invention provides a backrest frame assembly

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