JP2891286B2 - Vehicle 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 seat capable of protecting an occupant by reducing an impact load received from a vehicle body side wall by an airbag device provided in a seat cushion.

[0002]

2. Description of the Related Art Conventionally, in order to avoid a direct impact between a side wall of a vehicle body such as a door deformed by an impact load and a seated occupant in a side collision of a vehicle, various airbag devices have been used. There has been proposed, for example, a vehicle seat structure as disclosed in Japanese Patent Application Laid-Open No. 4-50052.

[0003] In this vehicle seat structure, an airbag device is provided on a seatback side portion facing a vehicle body side wall side so as to expand in a space perpendicular to the vehicle body side wall side or in a space between a seated person and the vehicle. I have. The airbag body of the airbag device has a relatively large diameter in an inflated state, and is formed so as to largely inflate toward the side of the seated person. Further, the door that has been deformed toward the vehicle interior due to the impact load is in a state of further pressing the greatly inflated airbag body toward the occupant.

[0004]

However, in such a conventional technique, in the case of a side collision, the door is deformed so as to enter the interior of the vehicle cabin due to the impact load, thereby bulging at the side of the seat back. There is a possibility that the airbag body is strongly pressed toward the interior of the vehicle cabin, thereby applying an impact load to the occupant.

In this case, there is a problem that the impact load received by the seated person from the airbag body becomes large, and the inertia force of the seated person at the time of collision cannot be effectively absorbed. Further, there is a risk that the occupant may tertiarily collide with interior parts in the vehicle interior such as a console box provided on the side of the seat back on the vehicle interior side due to an impact load received from the airbag body.

The present invention secures a space in which an airbag body of an airbag device can bulge in the event of a side collision of a vehicle,
The impact load received by the occupant from the airbag body can be suppressed, the inertia force applied to the occupant can be effectively absorbed, the secondary collision of the occupant against the side wall of the vehicle body can be prevented, and It is an object of the present invention to provide a vehicle seat that can prevent a tertiary collision with an interior component of the vehicle and can surely improve the safety of a seated person.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a vehicle seat according to a first aspect of the present invention has a reinforcing member extending horizontally in a rear portion of a lower portion of a seat cushion. Both ends of the reinforcing member are formed so as to protrude outwardly from both side portions of the seat cushion, and extend in a direction orthogonal to the reinforcing member to at least a side of the reinforcing member facing the vehicle body side wall, and recline the seat back. Attach the inner bracket facing the side of the mechanism,
An outer bracket parallel to the inner bracket is fixed to a tip of the reinforcing member, a space is formed by connecting the outer bracket and the inner bracket with a horizontal bar, and a height position of the horizontal bar is set to the height of the seatback. A gas generator is formed at a position along the longitudinal direction of the lower frame, and a gas generator is provided in the space, and an airbag body is provided, into which gas ejected from the gas generator flows and inflates. It is characterized in that the side collision airbag device, which holds the folded state at the time, is housed.

In the vehicle seat according to the second aspect of the present invention, reinforcing members extending horizontally in the rear of the lower portion of the seat cushion are fixed at appropriate intervals in the front and rear directions, and both ends of the pair of front and rear reinforcing members are seated. An inner bracket extending outward in a direction orthogonal to the pair of front and rear reinforcing members is fixed to at least a side of the pair of front and rear reinforcing members facing the vehicle body side wall, and is formed to protrude outward from both side portions of the cushion. An outer bracket parallel to the inner bracket is fixed to the tip of the reinforcing member, and gas is generated in a space between the outer bracket and the inner bracket on the side facing the vehicle body side wall and between the pair of front and rear reinforcing members. And an airbag body into which gas ejected from the gas generator flows and swells, the side where the airbag body is normally folded. And wherein the housing the use air bag system.

[0009]

According to the vehicle seat according to the first aspect of the present invention, a reinforcing member extending horizontally is fixed to the rear of the lower portion of the seat cushion, and both ends of the reinforcing member protrude outward from both side portions of the seat cushion. An inner bracket extending in a direction perpendicular to the reinforcing member and facing a side portion of a reclining mechanism of a seat back, and fixed to at least a side of the reinforcing member facing the vehicle body side wall; An outer bracket parallel to the inner bracket is fixed to the outer bracket, and the outer bracket and the inner bracket are connected by a horizontal rod to form a space, and a height position of the horizontal rod is set in a longitudinal direction of a lower frame of the seat back. A gas generator, and an airbag body into which the gas ejected from the gas generator flows and expands. Airbag because the body accommodating the side-impact air bag device that holds the normal folded state,
In the case of a side collision, the intrusion of the cabin on the vehicle body side wall side can be suppressed by the outer bracket and the inner bracket at the distal end of the reinforcing member, and in the case of a side collision, a side collision in the space between the vehicle body side wall side and the occupant. The airbag body of the airbag device for use bulges at least to the sides of the head and chest of the occupant, reduces the impact load received by the occupant from the airbag body, and effectively reduces the inertial force applied to the occupant. To prevent a secondary collision of the occupant against the side wall of the vehicle body,
Further, it is possible to prevent the occupant from tertiarily colliding with the interior component in the vehicle compartment.

According to the vehicle seat according to the second aspect of the present invention, reinforcing members extending horizontally in the rear of the lower portion of the seat cushion are fixed at appropriate intervals in the front and rear directions, and both ends of the pair of front and rear reinforcing members are fixed. Is formed so as to protrude outward from both side portions of the seat cushion, and an inner bracket extending in a direction orthogonal to the pair of front and rear reinforcing members is fixed to at least a side of the pair of front and rear reinforcing members facing the vehicle body side wall, An outer bracket parallel to the inner bracket is fixed to the front end of the pair of front and rear reinforcing members, and is provided between the outer bracket and the inner bracket on the side facing the vehicle body side wall and in a space between the front and rear pair of reinforcing members. A gas generator, and an airbag body into which gas ejected from the gas generator is introduced and swells, and the airbag body holds a folded state at normal times. Since the side collision airbag device is housed, a substantially square frame including the pair of front and rear reinforcing members, the outer bracket at the tip of the reinforcing member, and the inner bracket prevents entry into the vehicle cabin on the side wall of the vehicle body in the event of a side collision. The airbag body of the side collision airbag device in the space facing the side wall of the vehicle body is inflated corresponding to at least the sides of the head and chest of the seated person, and the seated person The impact load received from the bag body is suppressed, the inertial force applied to the occupant can be effectively absorbed, secondary collision of the occupant against the side wall of the vehicle body can be prevented, and the occupant can use Tertiary collision can be prevented.

In this manner, the airbag body of the side collision airbag device inflates in the space secured between the side wall of the vehicle body and the seated occupant while minimizing the intrusion of the vehicle into the cabin on the side wall of the vehicle body. As a result, the airbag body of the side collision airbag device is not pushed harder than the vehicle body side wall and does not apply an impact load to the occupant.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat according to the present invention will be described below in detail with reference to the drawings. 1 to 8 each show an embodiment of a vehicle seat according to the present invention. As shown in FIG. 2, the vehicle seat 20 includes a driver seat and a passenger seat,
Although the driver's seat and the passenger's seat are formed symmetrically in this embodiment, the present invention is not limited to this.

A floor tunnel 11 extending in the front-rear direction is formed at the center of the vehicle body floor 10, and a driver's seat and a passenger seat are provided on the left and right of the floor tunnel 11. Each seat of the vehicle seat 20 is a vehicle body floor 10
The seat cushion 21 is provided so as to be movable back and forth through a front and rear slide mechanism 12 and a seat back 23 supported at the rear end of the seat cushion 21 via a reclining mechanism 24 so as to be tiltable back and forth. .

As shown in FIGS. 1 and 2, a horizontally extending reinforcing member 31 is fixed to a lower portion of a fixed rail 12a of the front-rear sliding mechanism 12, and a distal end 31a of the reinforcing member 31 is provided.
Are formed to protrude outward from both sides of the seat cushion 21, respectively. The reinforcing member 31 is a highly rigid bar-shaped member for transmitting the impact load received from the door on the side of the vehicle body side wall 14 in the event of a side collision and for preventing deformation of the side portion of the seat cushion 21 as much as possible. It is a member.

As shown in FIG. 3, a pair of fixing brackets 35 extending in the direction of the fixing rail 12a of the front-rear sliding mechanism 12 are formed on the reinforcing member 31, and the fixing bracket 35 is fixed to a lower portion of the fixing rail 12a. On the inner side at an appropriate distance from the tip 31a of the reinforcing member 31,
An inner bracket 39 extending in a direction orthogonal to the longitudinal direction of the reinforcing member 31, facing the side of the reclining mechanism 24, and having a substantially L-shaped shape similar to the side of the reclining mechanism 24 is fixed. .

An outer bracket 41 parallel to the inner bracket 39 is fixed to the tip 31a of the reinforcing member 31, respectively. The outer bracket 41 and the inner bracket 39 are connected by a horizontal rod 43 to form a substantially rectangular space. Portions 45 are formed on the left and right sides of the seat cushion 21, respectively. In addition, the outer bracket 41 and the inner bracket 39 at least on the side facing the vehicle body side wall 14 of the outer bracket 41 are connected by the horizontal rod 43, and the substantially rectangular space 45 is formed at least on the side facing the vehicle body side wall 14 side. It is sufficient if it is formed in

In this embodiment, the height of the horizontal rod 43 is formed at a position along the longitudinal direction of the lower frame 23a of the seat back 23, and the entry into the vehicle interior on the side wall 14 of the vehicle body in the event of a side collision is reinforced. Member 31 and tip 31a of reinforcing member 31
Outer bracket 41, horizontal rod 43 and inner bracket 3
9, and the load can be transmitted to the lower frame 23a of the seat back 23.

A side collision airbag device 51 is accommodated in at least a space portion 45 of the left and right space portions 45 facing the vehicle body side wall 14 side. As shown in FIGS. 2 and 8, the side collision airbag device 51 is unitized,
The base plate 52 of the airbag device 51 is
1, is fixed to the inside of a substantially quadrangular frame body including the outer bracket 41, the lateral rod 43, and the inner bracket 39.

As shown in FIG. 8, a gas generator 53 is housed and fixed to a base plate 52, and when the gas generator 53 is operated, the gas ejected from the gas generator 53 flows in and expands. And an airbag body 55 fixed to the upper side of the airbag body, and the airbag body 55 is covered with an airbag cover 57 in a state where the airbag body 55 is kept folded.

In the event of a side collision, the tip 31 of the reinforcing member 31
a, the air of the side collision airbag device 51 in the space 45 between the vehicle body side wall 14 side and the occupant secured by the substantially rectangular frame formed by the outer bracket 41, the lateral rod 43, and the inner bracket 39; As shown in FIG. 2, the bag body 55 bulges corresponding to at least the sides of the head and chest of the occupant, suppresses the impact load received by the occupant from the airbag body 55, and reduces the inertial force applied to the occupant. It can be effectively absorbed and can prevent a secondary collision of a occupant against the vehicle body side wall 14 side.

As shown in FIG. 2, near the side beam 15 of the door on the side wall 14 of the vehicle body, an impact load at the time of a side collision with the door is detected, and the side collision air stored in the space 45 is detected. A sensor 61 for instructing the airbag body 55 of the bag device 51 to inflate is provided. The sensor 61 is generally of three types: an electromechanical type, a mechanical type, and an electronic type.

The front end 31a of the reinforcing member 31 extending to the adjacent seat side projects further to the side than the side of the seat cushion 21. It can be suppressed by the substantially rectangular frame formed by the distal end 31a of the member 31, the outer bracket 41, the lateral rod 43, and the inner bracket 39, and can also reduce the impact load input from the vehicle body side wall 14 in the event of a side collision. Tunnel 11 on the car body floor 10
Can be transmitted to the side.

FIGS. 4 to 7 show different embodiments of the present invention. Parts corresponding to those of the above-described embodiment are denoted by the same reference numerals, and further detailed description is omitted. The reinforcing members 31 are fixed to the front and rear at appropriate intervals, and the front ends 31a of the pair of front and rear reinforcing members 31 are formed so as to protrude outward from both side portions of the seat cushion 21. At least the vehicle body side wall 14
An inner bracket 39 extending in a direction orthogonal to the pair of front and rear reinforcing members 31 is fixed to the side opposite to the side, and the inner bracket 3 is attached to the distal end 31a of the pair of front and rear reinforcing members 31.
An outer bracket 41 parallel to 9 is fixed, and a side collision airbag device 51 is housed in a space 45 between the outer bracket 41 and the inner bracket 39 on the side facing the vehicle body side wall 14 side.

An outer bracket 41 is provided at the tip 31a of the reinforcing member 31 extending to the adjacent seat side which is the floor tunnel 11 extending in the front-rear direction at the center of the vehicle body floor 10, and the inner bracket 39 is omitted. However, a space portion 45 may be formed by providing the inner bracket 39 similarly to the vehicle body side wall 14 side.

[0025]

The structure of the vehicle seat according to the embodiment of the present invention has been described above. According to the vehicle seat according to the first aspect of the present invention, the reinforcement extending in the horizontal direction behind the lower portion of the seat cushion. The member is fixed, and both ends of the reinforcing member are formed so as to protrude outward from both side portions of the seat cushion, and at least a side of the reinforcing member facing the vehicle body side wall,
An inner bracket extending in a direction perpendicular to the reinforcing member and facing the side of the reclining mechanism of the seat back is fixed, an outer bracket parallel to the inner bracket is fixed to a tip of the reinforcing member, and the outer bracket and the inner bracket are fixed. Connect the bracket with the horizontal rod to form a space,
The height position of the horizontal rod is formed at a position along the longitudinal direction of the lower frame of the seat back, and a gas generator and air that is blown by the gas ejected from the gas generator flows into the space. Since the airbag body contains a side collision airbag device in which the airbag body is normally kept in a folded state, the invasion of the vehicle body on the side wall of the vehicle body at the time of a side collision is prevented by the tip of the reinforcing member. It can be suppressed by the outer bracket and the inner bracket, and the load can be transmitted to the lower frame of the seat back via the horizontal rod and the inner bracket, and the space between the side wall of the vehicle body and the occupant in the case of a side collision The airbag body of the side airbag device in the section bulges corresponding to at least the sides of the head and chest of the occupant, suppressing the impact load received by the occupant from the airbag body, and Can absorb Waru inertial force effectively, it is possible to prevent the seated person secondary collision against the vehicle body side wall, also seated person is prevented from colliding tertiary into the passenger compartment interior trim.

According to the vehicle seat according to the second aspect of the present invention, reinforcing members extending horizontally in the rear of the lower portion of the seat cushion are fixed at appropriate intervals in the front and rear directions, and both ends of the pair of front and rear reinforcing members are fixed. Is formed so as to protrude outward from both side portions of the seat cushion, and an inner bracket extending in a direction orthogonal to the pair of front and rear reinforcing members is fixed to at least a side of the pair of front and rear reinforcing members facing the vehicle body side wall, An outer bracket parallel to the inner bracket is fixed to the front end of the pair of front and rear reinforcing members, and is provided between the outer bracket and the inner bracket on the side facing the vehicle body side wall and in a space between the front and rear pair of reinforcing members. A gas generator, and an airbag body into which gas ejected from the gas generator is introduced and swells, and the airbag body holds a folded state at normal times. Since the side collision airbag device is housed, a substantially square frame including the pair of front and rear reinforcing members, the outer bracket at the tip of the reinforcing member, and the inner bracket prevents entry into the vehicle cabin on the side wall of the vehicle body in the event of a side collision. The airbag body of the side collision airbag device in the space facing the side wall of the vehicle body is inflated corresponding to at least the sides of the head and chest of the seated person, and the seated person The impact load received from the bag body is suppressed, the inertial force applied to the occupant can be effectively absorbed, secondary collision of the occupant against the side wall of the vehicle body can be prevented, and the occupant can use Tertiary collision can be prevented.

According to the present invention, in the event of a side collision of a vehicle,
A space where the airbag body of the airbag device can inflate is secured, the impact load received by the occupant from the airbag body can be suppressed, the inertial force applied to the occupant can be effectively absorbed, and the seating on the side of the vehicle body side can be achieved. It is possible to obtain a vehicle seat that can prevent a secondary collision of an occupant, prevent a occupant from tertiarily colliding with an interior component in a vehicle cabin, and reliably improve the safety of the occupant.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a vehicle seat according to the present invention.

FIG. 2 is a front view showing one embodiment of a vehicle seat according to the present invention.

FIG. 3 is a perspective view showing one embodiment of a reinforcing member for a vehicle seat according to the present invention.

FIG. 4 is an exploded perspective view showing another embodiment of the vehicle seat according to the present invention.

FIG. 5 is a front view showing another embodiment of the vehicle seat according to the present invention.

FIG. 6 is a perspective view showing another embodiment of the vehicle seat according to the present invention.

FIG. 7 is a perspective view showing another embodiment of the reinforcing member of the vehicle seat according to the present invention.

FIG. 8 is a perspective view showing an embodiment of an airbag device for a vehicle seat according to the present invention.

[Explanation of symbols]

 Reference Signs List 20 vehicle seat 21 seat cushion 23 seat back 23a seat back frame 31 reinforcing member 35 fixing bracket 39 inner bracket 41 outer bracket 43 lateral rod 45 space 51 airbag device 52 base plate 53 gas generator 55 airbag body 57 airbag cover 61 sensor

Claims (2)

(57) [Claims] 1. A reinforcing member extending in the horizontal direction is fixed to the rear of a lower portion of a seat cushion, and both ends of the reinforcing member are formed so as to protrude outward from both side portions of the seat cushion. Side, the inner bracket extending in the direction orthogonal to the reinforcing member, and facing the side of the reclining mechanism of the seat back is fixed, and the outer bracket parallel to the inner bracket is fixed to the tip of the reinforcing member. An outer bracket and an inner bracket are connected by a horizontal rod to form a space, and a height of the horizontal rod is formed at a position along a longitudinal direction of a lower frame of the seat back, and a gas generator is formed in the space. And an airbag body into which gas ejected from the gas generator flows and inflates, and the airbag body normally keeps a folded state at normal times. A vehicle seat, wherein the side collision airbag device is housed. 2. A reinforcing member extending horizontally in the lower part of the seat cushion and fixed at appropriate intervals in the front and rear directions, and both ends of the pair of front and rear reinforcing members are formed so as to protrude outward from both side portions of the seat cushion. An inner bracket extending in a direction orthogonal to the pair of front and rear reinforcing members is fixed to at least a side of the pair of front and rear reinforcing members facing the vehicle body side wall, and a front end of the pair of front and rear reinforcing members is parallel to the inner bracket. A gas generator fixed to an outer bracket, a gas generator in a space between the outer bracket and the inner bracket on the side facing the vehicle body side wall, and a space between a pair of front and rear reinforcing members, and gas ejected from the gas generator. And an airbag body that flows into and inflates the airbag body, and the airbag body houses a side collision airbag device that normally holds a folded state. Vehicle seat.