Seat backrest tie piece driving system

Abstract

The invention discloses a seat backrest tie piece driving system. The seat backrest tie piece driving system comprises a kidney support spring frame, a sliding supporting body, a tie piece, a positioning piece and a tie piece actuator, and the upper portion of the kidney support spring frame is used for being hung on and connected to a backrest framework of a seat; the sliding supporting body is arranged on the kidney support spring frame, and is provided with a sliding limiting groove; the first end of the tie piece is arranged on a first suspending point on the backrest framework; the positioning piece is arranged on a second suspending point on the backrest framework; the tie piece actuator comprises a housing, a driven inner gear, a driving outer gear and a handle, and the driven inner gear is rotatably arranged in the housing, and is provided with a tie piece hanging connecting structure used for fixing the tie piece; the driving outer gear is meshed with the driven inner gear; the handle is used for driving the driving outer gear to rotate; the second end of the tie piece is fixed to the tie piece hanging connecting structure. In the seat backrest tie piece driving system, the function of retracting and releasing can be simply achieved through the single tie piece and the kidney support spring frame, the structure of a kidney support product is simplified, the cost is lowered, the installation is facilitated, and a structural form which is simplified in structure, miniaturized and integrated is achieved.

Description

technical field [0001] The invention relates to the technical field of seat lumbar support, in particular to a driving system for seat back tension tendons. Background technique [0002] With the development of science and technology in the field of vehicle transportation, people have higher and higher requirements for vehicle ride comfort. A simple manual adjustment support technology for the waist and back of the seat in the vehicle field has also emerged as the times require, and has gradually been applied in the market. [0003] In the past, this type of seat back tension driving system usually uses a tension driver, and the traction wire rope passes through the pulley block and the lumbar support spring frame to realize the local bulge or flattening of the seat back and seat surface, and then realize the lumbar and back support of the human body. . [0004] The lacing driver of this kind of lumbar support product is to drive the lacing driver by adjusting the lifting ...

AI Technical Summary

Problems solved by technology

[0005] However, in this type of traditional seat back tension drive system, the two ends of the tension tendon are fixed on the lumbar support back plate, and the pulley is bypassed in the middle. , the tendons are tightened (relaxed), and the backboard of the lumbar support moves up and down along the frame line, thereby jacking up and retracting. The existing scheme has structures such as the backboard of the lumbar support, frame lines, pull rods, pulleys, and fixing pins, and there are many parts. The system structure is complex, the volume is relatively large, and the cost is relatively high

The reason for the cumbersome installation and operation inside the seat has been complained by various car seat factories

Moreover, the traditional lacing driver usually uses an adjustment handle to drive the lacing drive gear to rotate, which is affected by the large rotational torque of the handle, making manual operation more laborious

For this reason, some manufacturers adopt the form of gear sets to reduce the rotational moment. However, when the frame side plates inside the relatively narrow seat back are arranged, it is not easy to arrange because of the large structure and cumbersome installation operations. chair factory complained

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