Backrest restraints in truck passenger seats

Abstract

The invention discloses a backrest limiting device in a truck co-driver seat. The limiting device comprises a base framework and a backrest framework, wherein mounting supporting bases are arranged on the left and the right of the base framework respectively, a limiting opening is formed in the mounting supporting base on one side, a limiting stopping block is arranged on the mounting supporting base on the other side, limiting pins are fixed to the left and the right of the backrest framework, and when the backrest framework is turned backwards, the limiting pin on one side of the backrest framework is right clamped in the limiting opening and the limiting pin on the other side right abuts against the limiting stopping block. A locking support is arranged on the mounting supporting base on the same side as the limiting stopping block, a rotary shaft is borne in the locking support, and a locking block and the rotary shaft are fixed. After the backrest framework rotates till the limiting pin abuts against the limiting stopping block, the locking block rotates inwards till the locking end of the locking block and the limiting stopping block can lock the limiting pin in a front and back clamping mode, so that the backrest framework and the base framework are fixed. After the locking block rotates outwards to depart from the limiting pin, the backrest framework can freely rotates forwards. The backrest limiting device in the truck co-driver seat has the advantage of being low in price.

Description

technical field [0001] The invention relates to a backrest limiting device in a truck passenger seat. Background technique [0002] The passenger seat of the truck is composed of a base frame and a backrest frame hinged on the rear side of the base frame. In the currently used truck co-pilot seat, the backrest frame is adjusted by the recliner to adjust the flip angle with the base frame, and the position is limited and fixed after the flip. Due to the restrictions on the use of truck co-pilot seats, the customer only needs that the backrest frame of the seat can be fixed at a fixed angle with the base frame during use, and that the backrest frame of the seat can be completely turned down to be close to the seat when it is not in use. The base frame does not require the adjustment of different flip angles between the backrest frame and the base frame in the seat. Therefore, the currently used truck passenger seat not only cannot meet the customer's requirements, but also be...

AI Technical Summary

Problems solved by technology

Due to the restrictions on the use of truck co-pilot seats, the customer only needs that the backrest frame of the seat can be fixed at a fixed angle with the base frame during use, and that the backrest frame of the seat can be completely turned down to be close to the seat when it is not in use. The base frame does not require the adjustment of different flip angles between the backrest frame and the base frame in the seat. Therefore, the currently used truck passenger seat not only cannot meet the customer's requirements, but also because the recliner The price is high, which greatly increases the production cost of the enterprise and the use cost of customers

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