Vehicle seat backrest locking device

Abstract

The invention provides a vehicle seat backrest locking device which comprises a seat skeleton and a backrest skeleton. A disc-shaped cam and a handle are installed on the seat skeleton. A transverse rod, a transverse rod pin shaft, a longitudinal rod and a longitudinal rod pin shaft are arranged on the side wall of the seat skeleton separately, the middle of the transverse rod is installed on thetransverse rod pin shaft, the left end of the transverse rod abuts against the top of the disc-shaped cam, the right end of the transverse rod is connected with the upper end of the longitudinal rod through the longitudinal rod pin shaft, and a vertical kidney-shaped hole is formed in the longitudinal rod. The device further comprises a toothed plate, the left end of the toothed plate is providedwith a limiting block protruding out of the toothed plate, and the limiting block can move inside the kidney-shaped hole; a spline pin shaft is arranged at the lower side of the backrest skeleton, theright end of the toothed plate is installed on the spline pin shaft, and the toothed plate can rotate around the circle center of the spline pin shaft. The connecting structure of the disc-shaped camand the transverse rod can change the height of the kidney-shaped hole on the longitudinal rod, and therefore the rotating stroke of the toothed plate is adjustable, the backrest angle regulating range is enlarged, and the adjusting flexibility is improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle seats, and in particular relates to a vehicle seat backrest locking device. Background technique [0002] The seat back is suitable for the adjustment of the front and rear rotation of the passenger seat back of various passenger cars. The backrest and seat cushion of the existing seat are connected together by a recliner to the backrest frame and the seat frame. There are two types of recliners currently in use: tooth plate type and gas spring type. One side of the tooth plate recliner is connected with the backrest frame by bolts and nuts, and the other side is also connected with the seat frame by bolts and nuts. The tooth plate recliner is not only the rotation center of the backrest, but also plays the role of backrest angle. The role of regulation. [0003] The existing seat back locking device using a toothed plate recliner has a small adjustment stroke, and the adjustment stroke is fixed...

AI Technical Summary

Problems solved by technology

[0003] The existing seat back locking device using a toothed plate recliner has a small adjustment stroke, and the adjustment stroke is fixed and cannot be adjusted, resulting in inflexible use, and the existing seat back locking device usually only passes through each other. The structure of matching pins, slots, and holes locks the backrest, and the locking strength is not high enough. In severe cases, the locking will fail and the function will be lost, making it difficult to meet the safety requirements of passenger cars.

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