JPH07267038A - Safety seat for vehicle - Google Patents

Abstract

PURPOSE:To reliably improve safety of a seated person by restraining reaction applied from an air bag to the seated person by securing a space in which an air bag can swell, effectively absorbing inertia force applying to the seated person, preventing secondary collision of the seated person with the car body side wall side, and preventing tertiary collision of the seated person with an interior trim material, in the case of side collision of a vehicle. CONSTITUTION:A projecting part 21a which extends so as to approach the car body side wall 12 side and restrains an entrance of the car body side wall 12 side into the interior in the case of side collision, is formed on one side end side opposed to the car body side wall 12 side above a seat back 21, and a side collision use air bag 40 to swell in response at least to a head part and the side of a chest part of a seated person in a space between the seated person and the car body side wall 12 side secured by the projecting part 21a in the case of side collision, is internally trimmed in this projecting part 21a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a vehicle safety seat capable of protecting a seated person by mitigating an impact load received from a side wall of a vehicle body with an airbag.

[0002]

2. Description of the Related Art Conventionally, as a technique capable of avoiding a direct collision between a seat side and a side wall of a vehicle body such as a door which is deformed by an impact load in the case of a side collision of a vehicle, for example, Japanese Patent Laid-Open No. 4-50052. There is one as shown in Japanese Patent Publication. That is, an airbag that bulges in a direction perpendicular to the vehicle body side wall side or in a direction toward a space between the seated person and the vehicle body side wall side is provided on the side of the vehicle body side wall.
Here, the airbag has a relatively large diameter when inflated, and is formed so as to largely inflate laterally of the seated person. Further, the door deformed toward the passenger compartment by receiving the impact load is in a form of further pressing the greatly inflated airbag toward the seated person.

[0003]

However, in such a conventional technique, at the time of a side collision, the impact load causes the door to be deformed so as to enter the inside of the vehicle interior, so that the side portion of the seat back bulges out. The air bag is strongly pushed toward the passenger compartment, and there is a risk that the air bag will move toward the seated person. In that case, there is a problem that the reaction force that the seated person receives from the airbag becomes large, and the inertial force of the seated person at the time of a collision cannot be effectively absorbed. Also,
There has been a problem that a reaction force received from the airbag by the seated person causes an increased number of tertiary collisions with a vehicle interior such as a console adjacent to a side portion of the seat back near the vehicle interior.

The present invention has been made in view of such a conventional problem, and when a side collision of a vehicle is ensured, a space in which the airbag can be inflated is ensured and a seated person receives it from the airbag. The force can be suppressed and the inertial force applied to the seated person can be effectively absorbed, preventing the seated person from colliding against the side wall of the vehicle body secondarily and preventing the seated person from colliding with the interior of the passenger compartment. However, it is an object of the present invention to provide a vehicle safety seat that can surely improve the safety of a seated person.

[0005]

The gist of the present invention for achieving the above object is to: 1 When a side collision of a vehicle occurs, the impact load received from the side wall (12) of the vehicle body is applied by the airbag (40). A vehicle safety seat (20A, which can be relaxed to protect the seated person)
20B), one side end of the upper portion of the seat back (21) facing the vehicle body side wall (12) side extends so as to be close to the vehicle body side wall (12) side. A space (between the side wall (12) side of the vehicle body and a seated person) formed by forming a protrusion (21a) for restraining entry into the vehicle compartment, the protrusion (21a) ensuring the protrusion (21a) in the event of a side collision. Inside the airbag (4) for side impact, which bulges corresponding to at least the sides of the head and chest of the seated person.
(0) interior safety seat (2)
0A, 20B).

2 The upper part of the seat back (21) and the protruding part (21a) of the seat back (21) in the side wall collision (12) during a side collision
A high-rigidity reinforcing member (23) for laterally transmitting an impact load received from the side is extended in the vehicle width direction and internally provided, and one end of the reinforcing member (23) extending into the protruding portion (21a). The vehicle safety seat (2) according to claim 1, wherein the side airbag (40) is fixedly provided on the (23a).
0A, 20B).

[0007]

In a side collision of a vehicle, the side wall (12) of the vehicle body, such as a door, which receives the impact load tends to be deformed toward the inside of the vehicle, but the seat back (2) facing the side wall (12) of the vehicle body.
1) Since it collides with the protrusion (21a) on the one side end of the upper part, the vehicle body side wall (12) is prevented from entering the vehicle interior as much as possible. Therefore, a living space for the seated person is secured, and the protrusion (2) is provided between the side wall (12) of the vehicle body and the seated person.
A space for the airbag, in which the side impact airbag (40) installed in 1a) can be sufficiently expanded, is secured.

A high-rigidity reinforcing member (23) for laterally transmitting an impact load received from the side wall (12) of the vehicle body at the time of a side collision is provided on the upper portion of the seat back (21) and the projecting portion (21a) thereof. If installed internally, not only the deformation of the upper portion of the seat back (21) including the protruding portion (21a) can be prevented, but also the intrusion of the vehicle body side wall (12) into the passenger compartment can be more sufficiently prevented. Thereby, the space for the airbag can be more surely secured.

In this way, after the entry of the vehicle body side wall (12) side into the vehicle compartment is suppressed as much as possible, the side impact airbag (40) is provided in the space secured between the vehicle body side wall (12) side and the seated person. ) Bulges, the side impact airbag (40) is not pushed strongly from the vehicle body side wall (12) side and is not moving toward the occupant.

Therefore, the seated person does not receive an excessive reaction force from the airbag (40), and the inertial force of the seated person at the time of a collision can be effectively absorbed and alleviated. It is possible to prevent a secondary collision of the body, the chest and the like with the side wall (12) of the vehicle body. In addition, the seat back (2
1) It is possible to effectively prevent a third collision with a vehicle interior such as a console on the other end side.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention. As shown in FIG. 1, a driver's seat 20A that is a vehicle safety seat
The passenger seat 20B and the passenger seat 20B are arranged side by side on the vehicle body floor 10 with the floor tunnel 11 in between. Each seat 20A, 2
0B is a rail unit 12 on the vehicle body floor 10 respectively.
The seat cushion 31 is installed so as to be movable back and forth via the seat cushion 31, and the seat back 21 is supported at the rear end of the seat cushion 31 via the reclining device 25 so as to be tiltable.

As shown in FIG. 1, the outer side of the seat back 21 on the one side end facing the door (vehicle body side wall) 12 extends so as to be close to the door 12 and collides with the door 12 in the case of a side collision. The protruding portion 21a is formed. In addition, the inner projecting portion 21b that extends toward the adjacent seat side on the other side end facing the adjacent seat side in the upper part of the seat back 21 and that collides with the adjacent seat side during a side collision.
Are formed. Inner protrusion 21 of driver's seat 20A
b and the inner protruding portion 21b of the passenger seat 20B are arranged so as to face each other.

The seat back 21 includes a back frame 22.
Is provided inside, and a reinforcing member 23 is laterally provided above the back frame 22 so as to extend in the vehicle width direction. The reinforcing member 23 is a high-rigidity bar-shaped member for preventing the deformation of the upper portion of the seatback 21 as much as possible while transmitting the impact load received from the door 12 on the side wall of the vehicle body to the side during a side collision. .

One end portion 23a of the reinforcing member 23 extending toward the door 12 extends further laterally than the side portion of the back frame 22, and the one end portion 23a extends laterally in the outer protruding portion 21a. In this way, the outer projecting portion 21a is reinforced by the one end portion 23a of the reinforcing member 23 so as to suppress entry into the vehicle compartment on the door 12 side in the event of a side collision.

As shown in FIGS. 1 and 2, the outer projecting portion 21a has a seated occupant in a space between the seat 12 and the side of the door 12 secured by the outer projecting portion 21a in the case of a side collision. The airbag 40 for side impact that bulges corresponding to at least the sides of the head and chest is installed. More specifically, as shown in FIG. 3, the side airbag 4
The airbag device 41 provided with the
It is fixed to one end portion 23a of the reinforcing member 23 installed in a.

The airbag device 41 has an outer protruding portion 2
A case body 43 that is vertically elongated on the front side of 1a, an inflator 44 that is arranged at the deepest part of the case body 43, and a side collision airbag 40 that is arranged in a state of being folded in front of the inflator 44. It consists of and. Inflator 44
When a current flows through the ignition device in response to a signal from a sensor described later, the internal powder is ignited, a chemical reaction is caused to generate gas, and the side airbag 40 is made to have a predetermined size and shape. It is inflatable.

The side impact airbag 40 is a vehicle body side wall 1 secured by the outer protrusion 21a in the event of a side collision.
In the space between the two sides and the seated person, the size and shape shown in FIG. 2 are formed so as to correspond to at least the sides of the head and chest of the seated person. A cover plate 46 is connected to the opening edge of the case body 43 via a hinge 45. The cover plate 46 normally closes the opening of the case body 43, but is set to easily open outward due to the inflation output of the side impact airbag 40 in the event of a side collision.

As shown in FIG. 1, inside the door 12,
Detects an abnormal impact at the time of a side collision with the door 12,
A sensor 51 for instructing to inflate the side impact airbag 40 provided in the outer protrusion 21a is provided. The sensor 51 generally has three types of electromechanical type, mechanical type, and electronic type, but any of them may be used. For example, in the case of an electromechanical type, a steel ball that has entered a cylindrical cylinder is configured so that when a shock is applied, the force of the magnet is shaken off and the steel ball jumps forward and a current flows through the contact point through the steel ball. Such a sensor 51 is connected to the inflator 44 via a signal line so as to output a signal to the inflator 44 when an impact force of a predetermined value or more is received.

Further, the other end portion 23b of the reinforcing member 23 extending to the side of the adjacent seat extends further laterally than the side portion of the back frame 22, and the other end portion 23b is the inner projecting portion 21.
It extends laterally in b. As described above, the other end portion 23b of the reinforcing member 23 in the inner protrusion 21b is a portion that transmits the impact load input from the one end portion 23a of the reinforcing member 23 to the adjacent seat side during a side collision.

Next, the operation will be described. When another vehicle collides with the door 12 on the side of the driver's seat 20A to cause a side collision of the vehicle, the impact load causes the door 12 to deform and try to enter the vehicle interior. However, the door 12 that is about to be deformed to the inside of the vehicle is provided with the outer protruding portion 2 at the one side end of the upper portion of the seat back 21 of the driver's seat 20A beside it.
Since it collides with 1a, the door 12 is prevented from entering the vehicle interior as much as possible. Therefore, a living space for the seated person is ensured, and a space between the door 12 side and the seated person is ensured in which the side impact airbag 40, which is internally provided in the outer protruding portion 21a, can sufficiently inflate. To be done.

Inside the door 12 where the side collision occurs,
The sensor 51 that has detected the impact is
A signal is output to the inflator 44 of the airbag device 41 installed in a. And the inflator 44
Then, a signal is used as a trigger to cause a chemical reaction to generate gas, which causes the side airbag 40 to inflate instantaneously. As shown in FIG. 1, the side-impact airbag 40 is inflated in a space secured between the door 12 side and the seated person so as to comfortably correspond to the sides of the head and chest of the seated person. Put out.

Therefore, the side collision airbag 40 is installed in the door 12
There is no possibility that the occupant will be strongly pressed from the side and will not move toward the occupant vigorously, and that the occupant will not receive an excessive reaction force from the airbag 40. As a result, the airbag 40 for side impact that bulges so as to cover the head and chest of the seated person from the side.
As a result, the impact force from the door 12 side can be sufficiently mitigated, and the secondary collision of the seated person with the door 12 side can be prevented while effectively absorbing the inertial force applied to the seated person. . Further, it is possible to effectively prevent a seated person from thirdly colliding with a vehicle interior such as a console on the other end side of the seat back 21.

The impact load initially received by the outer protruding portion 21a at the one end of the seat back 21 is:
After inputting into one end 23a of the reinforcing member 23 inside thereof,
It is transmitted via the reinforcing member 23 so as to be laterally displaced as it is. The inner projecting portion 21b on the other end side of the upper portion of the seat back 21 faces the front passenger seat 20B.
Driver's seat 20A when it collides with the inner protrusion 21b on the side
The other end portion 23b of the reinforcing member 23 extending inside the inner protruding portion 21b on the side is the inner protruding portion 21b on the passenger seat 20B side.
The other end 23b of the reinforcing member 23 is hit.

As a result, the impact load is dispersed and reduced, but at this time, the high-rigidity reinforcing member 23 is stretched in the vehicle width direction above the seat back 21, so that the upper portion of the seat back 21 is crushed in the lateral width direction. It does not significantly deform and the living space near the chest of the seated person is sufficiently secured. In addition, another vehicle is the door 12 on the passenger seat 20B side.
Even if a side collision of the vehicle occurs due to the collision with the vehicle, the safety of the seated person is surely and sufficiently ensured, as described above.

The vehicle safety seat according to the present invention is
The present invention is not limited to the specific embodiment of the illustrated embodiment. For example, in the above-described embodiment, the side collision airbag has a size and shape corresponding to the head and chest of the seated person, but may be formed so as to extend further downward to correspond to the vicinity of the waist. Good.

[0026]

According to the vehicle safety seat of the present invention, a protrusion is formed at one end of the upper portion of the seat back for restraining the vehicle body from entering the vehicle compartment side wall in the event of a side collision. In the space between the side wall of the vehicle body and the seated person, which is secured by the projecting portion at the time of a side collision, the air for side collision that bulges corresponding to at least the side of the head and chest of the seated person. Since the bag is installed inside, the bulging side airbag is not pushed strongly toward the seated person from the side wall of the vehicle body, and the seated person does not receive excessive reaction force from the airbag. Therefore, it is possible to effectively absorb and mitigate the inertial force of the seated person at the time of a side collision, and it is possible to prevent the head and chest of the seated person from colliding secondarily with the side wall of the vehicle body. It is also possible to effectively prevent a seated person from thirdly colliding with a vehicle interior such as a console on the other end side of the seat back, and the seated person's safety is surely improved.

[Brief description of drawings]

FIG. 1 is a front view showing a vehicle safety seat (driver's seat and front passenger seat) according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a vehicle safety seat (passenger seat) according to an embodiment of the present invention.

FIG. 3 is an enlarged view showing an airbag device that constitutes a vehicle safety seat (passenger seat) according to an embodiment of the present invention.

[Explanation of symbols]

 20A ... Driver's seat (safety seat for vehicle) 20B ... Passenger's seat (safety seat for vehicle) 21 ... Seat back 21a ... Outer protruding portion 23 ... Reinforcing member 40 ... Side airbag 41 ... Air bag device

Claims (2)

[Claims] 1. A vehicle safety seat capable of protecting a seated person by cushioning an impact load from a side wall of a vehicle body with an airbag in the case of a side collision of a vehicle. On one side end side, a protrusion that extends so as to be close to the side wall of the vehicle body and suppresses intrusion into the vehicle compartment on the side wall of the vehicle body at the time of a side collision is formed, and the protrusion is secured by the protrusion at the time of a side collision. In a space between the side wall side of the vehicle body and the seated person, a side impact airbag that bulges corresponding to at least the side of the head and chest of the seated person is installed. Safety seat. 2. A high-rigidity reinforcing member for laterally transmitting an impact load received from a side wall of a vehicle body at the time of a side collision is provided in the upper portion of the seat back and its protruding portion so as to extend in the vehicle width direction.
2. The vehicle safety seat according to claim 1, wherein the side impact airbag is fixed to one end of the reinforcing member extending into the protrusion.