JP2784322B2 - Vehicle safety seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as a technique capable of avoiding a direct collision between a side wall of a vehicle body such as a door deformed by an impact load and a seated occupant in the event of a side collision of a vehicle, for example, Japanese Patent Laid-Open Publication No. There is a thing as shown in the gazette. That is, an airbag that inflates in a direction perpendicular to the vehicle body side wall or in a direction toward a space between the seated person and the vehicle body side wall side is provided on a seat back side portion facing the vehicle body side wall side.
Here, the airbag has a relatively large diameter in the inflated state, and is formed so as to largely inflate toward the side of the seated person. In addition, the door that has been deformed toward the interior of the vehicle due to the impact load has a shape in which the greatly inflated airbag is further pressed against the occupant.

[0003]

However, in such a conventional technique, in the case of a side collision, the door bulges at the side of the seat back due to a door or the like deformed to enter the vehicle interior due to the impact load. The airbag that has been pushed may be strongly pushed toward the interior of the vehicle, and may come to the occupant with vigor. In this case, there is a problem that the reaction force received by the seated person from the airbag becomes large, and the seated person's inertia force at the time of collision cannot be effectively absorbed. Further, there is another problem that a tertiary collision with a vehicle interior component such as a console adjacent to a side portion of the seatback near the vehicle interior is caused by a reaction force received by the seated person from the airbag.

The present invention has been made in view of such a conventional problem, and effectively absorbs an inertial force applied to a seated occupant at one end of a seat back in a side collision of a vehicle. While preventing the occupant from colliding against the side wall of the vehicle body and preventing the occupant from colliding with the interior of the vehicle cabin at the other end of the seat back, thereby ensuring the safety of the occupant. It is an object of the present invention to provide a vehicle safety seat that can be improved.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the gist of the present invention is as follows: (1) In the event of a side collision of a vehicle, an airbag (40a, 40b) receives an impact load received from a side wall (12) of a vehicle body. In the vehicle safety seat (20A, 20B) which can be relaxed by 40b) and protect the occupant, one side end of the upper part of the seat back (21) facing the side wall (12) of the vehicle body,
It partially extends to approach the vehicle body side wall (12) and collides with the vehicle body side wall (12) in the event of a side collision, thereby suppressing intrusion into the vehicle interior on the vehicle body side wall (12) side. The outer protruding portion (21a) for securing a space between the side of the seat back (21) and one end of the seat back (21) is formed. An inner protrusion (partially extending so as to approach the seat side and colliding with the adjacent seat side in a side collision and securing a space between the adjacent seat side and the other end side of the seat back (21)) 21b) to form the outer protrusion (21a).
A side collision airbag that inflates at least to the side of the head and chest of the seated occupant within a range of the width of the space secured by the outer protrusion (21a) in the event of a side collision. While the (40a) is provided, the inner protruding portion (21b) is also provided on at least the head and chest of the seated occupant within the range of the width secured by the inner protruding portion (21b) in the event of a side collision. The side airbag (40b) which inflates correspondingly to the side of is provided, and at the time of the side collision, the side airbag (40a) of the outer projecting portion (21a) inflates first, Then, the side airbag (4) of the inner protrusion (21b) is used.
0b) detects a shock at the time of a side collision and outputs a signal for bulging command at a different timing (5b) to bulge.
, 52) with the respective side collision airbags (40a, 40a).
b) The vehicle safety seats (20A, 20B) are connected to each other.

2 The upper part of the seat back (21) and the outer projecting part (21a) and the inner projecting part (21b) on both sides thereof are subjected to an impact load received from the side wall (12) of the vehicle body in a side collision. A high-rigidity reinforcing member (23) that transmits to the vehicle extends in the vehicle width direction and is internally provided. One end of the reinforcing member (23) extending into the outer protruding portion (21a) is attached to the one side protrusion. The other side collision airbag (40) is fixed to the other end of the reinforcing member (23) extending into the inner protruding portion (21b). The vehicle safety seat (20A, 20B) according to claim 1, wherein:

[0007]

In the case of a side collision of a vehicle, the side wall (12) of the vehicle body directly receiving the impact collides with the outer protrusion (21a) above the seat back (21), and the side wall (12) of the vehicle body.
Intrusion into the passenger compartment on the side is minimized. Therefore, a living space for the occupant is ensured, and the outer protruding portion (21a) is provided between the side wall (12) of the vehicle body and the occupant (specifically, one side end of the seat back (21)). A space for the airbag in which the provided side airbag (40a) can be sufficiently inflated is secured. Then, the side airbag (40a) is connected to the vehicle body side wall (12) side and the seat back (21) based on the first signal for inflation command of the sensor (51) which detects the impact at the time of the side collision. Swells in a space secured between the first side and the one side end, particularly in a range that fits within the width of the space. At this time, the side collision airbag (40a) is not pushed strongly from the side of the vehicle body side wall (12) and does not come to the occupant vigorously.

As described above, the side airbag (40a) of the outer protrusion (21a) firstly inflates at least to the side of the occupant's head and chest. ) Can reduce the impact force from the side, while effectively absorbing the inertial force applied to the occupant,
The secondary collision of the occupant against the side of the vehicle body side wall (12) can be prevented.

Subsequently, based on a signal output from the sensor (52) with a delay from the first signal for bulging command,
The side airbag (40b) provided on the inner protruding portion (21b) is delayed from the side airbag (40a) of the outer protruding portion (21a) so as to be out of timing, and the seated person (specifically, the seat) It swells in the space secured between the back (21) and the adjacent seat.

Accordingly, even if the occupant is rebounded in the vehicle interior direction due to the reaction force to some extent from the side airbag (40a) of the outer projecting portion (21a), the occupant's head The airbag (40b) for the side projection of the inner protruding portion (21b) bulged out of the outer protruding portion (21a) side at a different timing from the outer protruding portion (21a) side.
It is accepted. Therefore, the inner protrusion (21b)
For example, a tertiary collision of a occupant on a vehicle interior such as a console on the side of the next seat can be more reliably prevented.

The upper part of the seat back (21) and the outer projecting part (21a) and the inner projecting part (21b) on both sides of the seat back (21) receive an impact load received from the side wall (12) of the vehicle body in a side collision. If the high-rigidity reinforcing member (23) transmitting to the side is extended in the vehicle width direction and installed inside, it is possible to prevent deformation of the upper portion of the seat back (21) including the projecting portions (21a, 21b) on both sides. In addition to this, it is possible to secure a sufficient space for each side collision airbag (40a, 40b) to expand.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show one embodiment of the present invention. As shown in FIG. 1, a driver's seat 20A, which is a vehicle safety seat,
The passenger seat 20B is arranged side by side on the vehicle body floor 10 with the floor tunnel 11 therebetween. Each seat 20A, 2
0B are symmetrical to each other, and each can be tilted via a reclining device 25 at the rear end of the seat cushion 31 mounted on the vehicle body floor 10 via the rail unit 12 so as to be movable back and forth. And a seat back 21 supported by the vehicle.

As shown in FIG. 1, an upper portion of the seat back 21 at one end opposite to the door (vehicle side wall) 12 partially extends so as to be close to the door 12 so that the door can be closed in the event of a side collision. An outer projection 21a colliding with the outer projection 12 is formed. On the other hand, an inner protruding portion 21b that partially extends to approach the adjacent seat side and that collides with the adjacent seat side in the event of a side collision is provided on the other end side of the upper portion of the seat back 21 that faces the adjacent seat side. Is formed. The outer protruding portion 21a is described below between the door 12 side and the side end line of the seat back 21 by an amount that partially extends from one side end of the seat back 21, that is, a side end line other than the upper side. This is to secure a space in which the side collision airbag 40a can sufficiently expand. Similarly, the inner protrusion 2
1b is provided between the passenger seat 20B, which is an adjacent seat, and the side end line of the seat back 21 so as to partially extend from a side end line on the other end side of the seat back 21. This is to secure a space in which the airbag 40b can sufficiently expand. Note that the inner protruding portion 21b of the driver's seat 20A and the inner protruding portion 21b of the passenger seat 20B are arranged to face each other.

The seat back 21 has a back frame 22.
Is provided, and a reinforcing member 23 is provided horizontally 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 upper part of the seat back 21 from being deformed as much as possible while transmitting the impact load received from the door 12 on the side of the vehicle body side at the time of the side collision. .

One end 23a of the reinforcing member 23 extending toward the door 12 extends further to the side than the side portion of the back frame 22, and the one end 23a is
It extends laterally within 1a. Thus, the reinforcing member 23
The outer protruding portion 21a is reinforced by the one end portion 23a so as to minimize the intrusion of the door 12 into the passenger compartment in the event of a side collision.

On the other hand, the other end 23b of the reinforcing member 23 extending to the side of the adjacent seat also extends further to the side than the side of the back frame 22, and this other end 23b is located within the inner projection 21b. Extending toward you. In this manner, the other end 23b of the reinforcing member 23 in the inner protrusion 21b
Is a part for transmitting an impact load input from the one end 23a of the reinforcing member 23 to the adjacent seat side in a side collision.

As shown in FIGS. 1 and 2, the outer projecting portion 21a is
In the space between the door 12 side and the side end line secured by the above, the side that bulges corresponding to at least the sides of the head and chest of the seated occupant, particularly within the range of the width of the space. A collision airbag 40a is provided. On the other hand, also in the inner protruding portion 21b, in the space between the adjacent seat side and the side end line secured by the inner protruding portion 21b at the time of a side collision, particularly in a range that fits in the lateral width of the space, A side-impact airbag 40b that inflates at least on the sides of the head and chest of the seated person is provided.

More specifically, the side collision airbag 40
The airbag device 41 provided with the outer protrusion 21
a is fixed to one end 23a of the reinforcing member 23 contained in the inner member a. On the other hand, the airbag device 42 including the side collision airbag 40b is fixed to the other end 23b of the reinforcing member 23 provided inside the inner protrusion 21b.
The pair of airbag devices 41 and 42 are configured symmetrically with each other. Hereinafter, one airbag device 41 will be described as a representative.

As shown in FIG. 3, the airbag device 41
Is a case body 43 which is vertically opened on the front side of the outer protruding portion 21a, an inflator 44 arranged at the innermost part of the case body 43, and a side arranged in a state of being folded in front of the inflator 44. And a collision airbag 40a. When a current flows through the igniter in response to a signal from a sensor 51 described later, the inflator 44 ignites the explosive therein, causing a chemical reaction to generate gas, and causing the side collision airbag 40a to have a predetermined size. And swells in shape.

The side collision airbag 40a is provided in the space between the side wall 12 of the vehicle body and the side end line secured by the outer protrusion 21a in the event of a side collision, at least the head of the occupant and the airbag 40a. As shown in FIG. 2, it is formed so as to swell to a size and shape that fits in the lateral width of the space, corresponding to the sides of the chest. A cover plate 46 is connected to an 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 at the time of a side collision, the side collision airbag 40a
It is set so that it can be easily opened outward due to the expansion output.

As shown in FIG. 1, inside the door 12,
Detecting an abnormal impact at the time of a side collision with the door 12,
A first sensor 51 that outputs a signal for commanding inflation is provided in the side collision airbag 40a provided in the outer protrusion 21a. The first sensor 51 generally has three types: an electromechanical type, a mechanical type, and an electronic type, but any of them may be used.

For example, in the case of the electro-mechanical type, when a steel ball in a cylindrical cylinder receives an impact, the steel ball jumps out of the attraction force of the magnet and jumps forward, and a current flows through the steel ball to a contact. Have been. When such a first sensor 51 receives an impact force equal to or more than a predetermined value, the second sensor
At an earlier timing than the sensor 52, the inflator 44 of the airbag device 41 on the outer protruding portion 21a side.
Is connected to the inflator 44 via a signal line so as to output a signal to the inflator 44.

The other end 23b of the reinforcing member 23 in the inner projection 21b is provided with a second sensor for detecting the impact of the inner projection 21b colliding with the inner projection 21b on the adjacent seat side in the event of a side collision. A sensor 52 is provided. The second sensor 52 is located behind the first sensor 51 and the side airbag 40 on the inner projecting portion 21b side.
b is set to output a signal for bulging command. The second sensor 52 has three types of electromechanical type, mechanical type, and electronic type similarly to the first sensor 51, but any of them may be used.

Next, the operation will be described. When another vehicle collides with, for example, the door 12 on the passenger seat 20B side and a side collision of the vehicle occurs, the door 12 tries to enter the vehicle interior while being deformed by the impact load. However, the door 12 that is about to be deformed toward the vehicle interior is located on the passenger seat 20B beside it.
The outer projection 21a on one side end of the upper portion of the seat back 21 is prevented from entering the vehicle interior of the door 12 as much as possible. Accordingly, a living space for the occupant is ensured, and between the door 12 and the side end line of the seat back 21, the side airbag 40a provided on the outer protrusion 21a is sufficiently inflated. A space that can be put out is secured.

Inside the door 12 where the side collision has occurred, the sensor 51 detecting the impact outputs a signal to the inflator 44 of the airbag device 41 provided in the outer projection 21a. In the inflator 44, a signal is triggered to cause a chemical reaction to generate gas, which causes the side collision airbag 40a to inflate instantaneously. As shown in FIG. 1, the side collision airbag 40a
In the space secured between the side and the side end line, the bulges smoothly to the side of the head and chest of the seated occupant without difficulty, particularly within the width of the space.

As described above, since the side airbag 40a of the outer protruding portion 21a first expands so as to cover the occupant's head and chest from the side, the impact force from the door 12 side is reduced. It is possible to sufficiently alleviate the inertia force applied to the occupant, and to prevent the occupant from directly colliding against the door 12 side.

The impact load initially received by the outer protrusion 21a above the seat back 21 of the passenger seat 20B is as follows:
After inputting to one end 23a of the reinforcing member 23 therein,
It is transmitted via the reinforcing member 23 so as to be shifted to the side as it is. The inner protruding portion 21b on the other end of the upper portion of the seat back 21 is connected to the opposing driver's seat 20A.
Collides with the inner protruding portion 21b on the side.

As a result, the impact load is dispersed and attenuated, but at this time, the high-rigidity reinforcing member 23 stretches in the vehicle width direction at the upper portion of the seat back 21 so that the upper portion of the seat back 21 is crushed in the lateral width direction. The living space near the chest of the seated person is sufficiently secured.
Also, the impact of the inner protrusion 21b on the passenger seat 20B side colliding with the inner protrusion 21b on the driver seat 20A side is detected by the second sensor 52 on the passenger seat 20B side. A signal for commanding inflation is output to the airbag device 42 on the inner protruding portion 21b side later than the first sensor 51.

In the airbag device 42 that has received the signal from the second sensor 52, the side airbag 40b of the outer side projection 21a is delayed from the side airbag 40a of the outer projection 21a so that the inner side Part 21b
In the space between the driver's seat 20A side and the side end line secured by the above, the airbag protrudes without difficulty, particularly in a range that fits within the width of the space. Thereby, even if the occupant is pushed in the vehicle interior side direction by the reaction force received from the side airbag 40a of the outer protruding portion 21a that first swells, the occupant's head and chest are Inner projection 21b swelled out of timing with outer projection 21a
It is received by the side airbag 40b on the side.

Accordingly, the inner projection 2 of the passenger seat 20B
For example, it is possible to more reliably prevent a tertiary collision of the occupant with the interior of the vehicle compartment such as the console on the side of 1b. In the case where another vehicle collides with the door 12 of the driver's seat 20A instead of the passenger seat 20B and a side collision of the vehicle occurs, the safety of the occupant is ensured in the opposite manner to that described above. Secured.

As described above, the driver's seat 20A and the passenger's seat 20B, which are vehicle safety seats, are set to operate independently of each other. In one seat, the side collision airbag 40a on the collision side is inflated first, and then the side collision airbag 40b on the opposite side is inflated. And the passenger seat 20B may be configured to operate synchronously to protect the occupant. That is, the driver's seat 20A and the passenger's seat 20B, which are the vehicle safety seats, are operated in the following manner in synchronization with not only one of the collision side seats but also the other of the anti-collision side seats. Can be configured. Specifically, FIG.
As shown in FIG. 5, when a side collision occurs at the door 12 on the passenger seat 20B side, the side airbag 40a of the outer protruding portion 21a is firstly seated on the passenger seat 20B side by the side as described above. Bulges to prevent a secondary collision of the driver, and in synchronization with this, in the driver's seat 20A, the side collision airbag 40b of the inner protruding portion 21b facing the side of the door 12 that has collided with the side faces the driver's seat 20A. Of the occupant's head and chest to cover from the side.

Subsequently, on the side of the passenger seat 20B, behind the side airbag 40a of the outer protruding portion 21a bulging as described above, the side airbag of the inner protruding portion 21b is used to prevent a tertiary collision. 40b bulges so as to cover the occupant from the side, but in synchronization with this, in the driver's seat 20A, the side airbag 40b of the inner protruding portion 21b facing the door 12 that does not collide with the side surface. Bulges to cover the occupant of the driver's seat 20A from the side.

As described above, the driver's seat 20A and the passenger's seat 20B
If the airbag devices 41 and 42 of the seats 20A and 20B are controlled by the sensors 51 and 52 so that the seats operate in synchronization with each other, not only the occupants of the seats located on the collision side but also the seats on the anti-collision side The safety of the occupant can also be ensured.
The door 1 on the driver's seat 20A side instead of the passenger seat 20B side
In the case where a side collision occurs at 2, the safety of the occupants of both seats is ensured in a manner opposite to that described above.

[0034] The vehicle safety seat according to the present invention comprises:
The present invention is not limited to the specific embodiments of the illustrated embodiment. For example, in the above embodiment, the side collision airbag has a size and shape corresponding to the head and chest of the occupant, but may be formed to extend further downward to accommodate the vicinity of the waist. Good.

The sensors are divided into a first sensor corresponding to the side airbag of the outer projection and a second sensor corresponding to the side airbag of the inner projection.
It may be constituted by one sensor capable of detecting an impact at the time of a side collision and outputting different signals for bulging commands at different timings. Further, the location and number of sensors are not limited to those in the above-described embodiment.

[0036]

According to the vehicle safety seat according to the present invention, the side collision airbag on the side of the outer protruding portion which is the collision side at the time of the side collision of the vehicle firstly has the side wall of the vehicle body and one end of the seat back. Swelling in the space secured between the occupants, the impact force from the side wall of the vehicle body can be reduced, and the inertia force applied to the occupant is effectively absorbed while the occupant seats against the side wall of the vehicle body. Secondary collision can be prevented. Subsequently, the side collision airbag on the inner protruding portion side, which is the anti-collision side, swells in the space secured between the adjacent seat side and the other end of the seatback with a delay so that the timing is shifted. Therefore, a tertiary collision of the occupant with the vehicle interior component on the side of the seat next to the inner protrusion can be reliably prevented, and the safety can be further improved.

[Brief description of the drawings]

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

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

FIG. 3 is an enlarged view showing an airbag device constituting a vehicle safety seat according to one embodiment of the present invention.

FIG. 4 is an operation explanatory diagram when the vehicle safety seats (driver seat and passenger seat) according to one embodiment of the present invention are controlled to operate in synchronization with each other.

FIG. 5 is an operation explanatory diagram when the vehicle safety seats (driver seat and passenger seat) according to one embodiment of the present invention are controlled to operate in synchronization with each other.

[Explanation of symbols]

 20A: Driver's seat (vehicle safety seat) 20B: Passenger's seat (vehicle safety seat) 21: Seat back 21a: Outer projection 21b: Inner projection 23: Reinforcing member 40a, 40b: Side airbag 41, 42 ... airbag device 51 ... first sensor 52 ... second sensor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-50052 (JP, A) JP-A-3-281455 (JP, A) JP-A-4-78750 (JP, A) 108564 (JP, U) Actually open 48-33026 (JP, U) Actually open 57-168434 (JP, U) Actually open 3-121156 (JP, U) Actually open 5-3054 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60R 21/16-21/32

Claims (2)

(57) [Claims] A vehicle safety seat capable of protecting an occupant by cushioning an impact load received from a side wall of a vehicle body by an airbag in a side collision of the vehicle. The side wall partially extends to approach the vehicle body side wall and collides with the vehicle body side wall in the event of a side collision, thereby suppressing intrusion of the vehicle body side wall into the vehicle interior. While forming an outer protruding part to secure a space between the side seat and the side end, a part of the upper part of the seat back that extends to the side of the other seat opposite to the seat next to the seat next to the seat adjacent to the seat next to the side At the time of collision, forms an inner protrusion that secures a space between the adjacent seat and the other end of the seat back, and the outer protrusion is formed on the outer protrusion when a side collision occurs. Said sky secured by the part A side collision airbag that inflates at least to the side of the head and chest of the seated occupant is provided within the width of the occupant, and the inner protrusion is also provided in the case of a side collision. Provided is a side collision airbag that swells correspondingly to at least the sides of the head and chest of the seated occupant in a range that fits in the width of the space secured by: First, the side airbag is inflated, and thereafter, the side airbag of the inner protruding portion is inflated to detect an impact at the time of a side collision and to output a signal for inflation command at a different timing. A vehicle safety seat wherein a sensor is connected to each of the side collision airbags. 2. A high-rigidity reinforcing member for transmitting an impact load received from a vehicle body side wall in a side collision to the upper portion of the seat back and the outer projecting portion and the inner projecting portion on both sides thereof. The one side airbag is fixedly mounted at one end of the reinforcing member extending into the outer protruding portion, and the other side extending into the inner protruding portion of the reinforcing member. 2. The vehicle safety seat according to claim 1, wherein the other side collision airbag is fixed to an end portion.