Automobile seat

Abstract

Provided is an automobile seat with simple structure and high reliability. A clearance is kept between passengers' heads and pillows to prevent fremitus of passengers' heads by moving forward pillows through motions of a seat back frame when automobile back is impacted. What's more, a misoperation of swing mechanism is prevented in general state and pillows are prone to return to is original position. The automobile seat includes a seat cushion frame, a pair of side frames mounted on the seat cushion frame, a seat back frame mounted on the pair of side frames so as to be rocking within a limited range of angle, a seat back frame rocking mechanism for causing, when an acceleration greater than a predetermined value is inputted from behind a vehicle body, the seat back frame to undergo a rocking motion, and a rocking motion preventing member for preventing, when the acceleration greater than the predetermined value is not inputted from behind the vehicle body, the seat back frame rocking mechanism from causing the seat back frame to undergo the rocking motion.

Description

technical field [0001] The present invention relates to a vehicle seat capable of preventing a passenger's head from being shaken when the vehicle is hit from behind. Background technique [0002] In a vehicle seat, a headrest is usually provided above the seat back. When the passenger is sitting on the seat, there is a predetermined gap between the head of the passenger and the headrest. In the event of a collision, since the body moves forward while the head stays behind, the neck is loaded, which sometimes leads to head tremors. [0003] For this reason, although the gap between the head and the headrest can be reduced to minimize damage, there is a problem that the head will often touch the headrest even in a normal use state. The headrest interferes with each other and feels uncomfortable. [0004] In addition, it is also proposed that the headrest connected to the pressure receiving part is installed to swing freely, and the force is always applied to the rear by the...

AI Technical Summary

Problems solved by technology

However, since the headrest remains forward after a collision, there is a problem that the mechanism is complicated and the cost increases

[0011] Moreover, there is also a problem that when the seat back is reclined backward, if an excessive load is applied to the seat back frame, the swing mechanism (head vibration prevention mechanism) is operated against the will.

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