JPH09309403A - Headrest for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the leaning back of a heat by swelling an air bag and removing opening between a head of an occupant and a headrest mainbody when a shock is given to the back of a vehicle. SOLUTION: A headrest for a vehicle is provided with a shock detection means to detect a shock given to the back of a vehicle, an air bag 1 housed in a headrest main body 2, an air bag actuator 3 to swell the air bag 1, and a control means to control the air bag actuator 3 and to swell the air bag 1 when the volume of the shock detected by the shock detection means exceeds a prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle headrest equipped with an airbag, which is inflated when an impact is applied to the rear portion of the vehicle and comes into contact with the head of a seated occupant, in the headrest body.

[0002]

2. Description of the Related Art Conventionally, when a following vehicle collides with a vehicle,
Or when a vehicle collides with a building etc. while traveling backward,
A headrest is generally attached to a seat of a vehicle in order to prevent or reduce the impact of the rear portion of the vehicle on the occupant's head tilting backward and causing injury to the neck.

[0003]

SUMMARY OF THE INVENTION The conventional vehicle headrest described above has a rearward movement of the occupant's head when the occupant's head is in close contact with the headrest body when the vehicle receives a rearward impact. Can be prevented. However, since it is extremely difficult for a driver to drive while keeping his / her head in close contact with the headrest body, there is often a gap between the head and the headrest body during driving. Therefore, when an impact is applied to the rear part of the vehicle, the head may be tilted backward by the amount of this gap and the neck may be damaged.

Therefore, in the present invention, the headrest body is equipped with an airbag, and when the rear part of the vehicle receives an impact of a predetermined value or more, the airbag is inflated so that the space between the head of the occupant and the headrest body is increased. Eliminate the gap between
An object of the present invention is to provide a vehicle headrest capable of preventing the head from tilting backward.

[0005]

In order to solve the above problems, the present invention provides a headrest of a vehicle with an impact detection means for detecting an impact received on the rear part of the vehicle and outputting a signal, and a headrest body. And an air bag operating device for inflating the air bag, and a control device for inflating the air bag by controlling the air bag operating device in response to an output signal of the impact detection means. That is.

According to the vehicle headrest having the above structure,
The control means controls the airbag actuating device to inflate the airbag when the magnitude of the rear impact detected by the impact detection means exceeds a predetermined value. Therefore, the control means is provided between the occupant's head and the headrest body. It is possible to eliminate the gap and prevent the head from tilting backwards.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. FIG. 1 is a block diagram showing an overall configuration of a headrest of a vehicle, and FIG. 2 is a front view of a headrest body portion 2. Further, in FIG. 3, the vehicle V is the succeeding vehicle R.
When the vehicle is hit by V and the rear part is impacted, the airbag 1
FIG. 7 is an operation explanatory view showing that the vehicle is inflated to eliminate the gap between the head of the occupant H and the headrest body 2 to prevent the head from tilting backward.

An air bag 1 is mounted on a headrest main body 2 provided on a seat S of a driver's seat of a vehicle V. The airbag 1 is connected to an airbag operating device 3 that instantly inflates the airbag 1.

Further, an impact sensor 4 for detecting an impact received on the rear portion of the vehicle V is attached to the rear portion of the vehicle (see FIG. 3). When the impact sensor 4 detects the rear impact, the magnitude of the impact is determined. Outputs the corresponding shock detection signal. The impact detection signal is input to the control circuit 5 electrically connected to the impact sensor 4.

The control circuit 5 outputs an airbag actuation signal to the airbag actuation device 3 when the magnitude of the rear impact detected by the impact sensor 4 exceeds a predetermined magnitude. When the airbag operating device 3 receives the airbag operating signal, the airbag operating device 3 instantly inflates the airbag 1.
In principle, the means for inflating the airbag 1 is the same as the inflating means for a conventional airbag such as a driver's seat and a passenger's seat, and therefore its description is omitted.

Next, the operation of this embodiment will be described with reference to FIG. As shown in FIG. 3, when the vehicle V is collided with the following vehicle RV and the rear part receives an impact, the impact sensor 4 detects this impact. When the impact sensor 4 outputs an impact detection signal corresponding to this impact to the control circuit 5, the control circuit 5 outputs an airbag actuation signal when the magnitude of the detection signal exceeds a predetermined value.

When the airbag actuating signal is input to the airbag actuating device 3, the airbag actuating device 3 instantly inflates the airbag 1 mounted on the headrest body 2, so that the vehicle V receives a rear impact. Passenger H
The head portion of the vehicle is supported by the airbag 1 and the rearward leaning is prevented.

Incidentally, as an example of the case where the rear part of the vehicle V is impacted, there is an example in which the rear part of the vehicle V is applied to a building or the like when the vehicle is traveling backward, in addition to the rear-end collision of the following vehicle RV.

[0014]

According to the first aspect of the present invention, when the rear impact of the vehicle is received, the airbag mounted on the headrest body is inflated to eliminate the gap between the head of the occupant and the headrest body. Since it is possible to prevent the tilting of the head and the back of the head, it is possible to prevent damage to the neck.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment.

FIG. 2 is a front view of a headrest body portion.

FIG. 3 is an explanatory view of the operation of the embodiment.

[Explanation of Codes] 1 Airbag 2 Headrest Main Body 3 Airbag Actuating Device 4 Impact Sensor 5 Control Circuit V Vehicle H Occupant

Claims (1)

[Claims] 1. A shock detecting means for detecting a shock received at a rear portion of a vehicle and outputting a signal, an airbag mounted on a headrest main body, an airbag operating device for inflating the airbag, and the shock. A headrest for a vehicle, comprising: a control unit that controls the airbag operating device in response to an output signal of a detection unit to inflate the airbag.