JPH09109754A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily protect an occupant at side collision time of a vehicle by a relatively simple constitution. SOLUTION: Seat cushion brackets 4, 5 in a left front seat are fixed respectively to right/left slide rails 2, 3 mounted on a floor 1 of a vehicle, both ends of a reclining shaft 10 are pivotally supported to the seat cushion brackets 4, 5, a lower end of a right/left side frame 11 in a seat back in the left front seat is fixed to the reclining shaft 10. In this way, an upper end part is connected to an upper frame 12, in this connection part, a deformation weak point part to inside a car width direction is provided, further in also a lower end part of the side frame 11, a deformation weak point part to inside a car width direction is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle and, more particularly, to a seat for protecting an occupant of a vehicle in the event of a side collision.

[0002]

When a vehicle is strongly collided from the side, a so-called side collision, the center pillar,
Although the side surface of the vehicle body such as a door is deformed toward the vehicle interior, especially in the case of a vehicle body such as a passenger car in which the upper portion of the vehicle body side surface is relatively inclined toward the vehicle center side, the deformed vehicle side surface is Since the vehicle body may be displaced toward the passenger compartment center side as it goes upward, and therefore, the side surface portion of the seated occupant, particularly the deformed side surface of the vehicle body, may be damaged, the present invention is relatively simple. An object of the present invention is to provide a vehicle seat that can easily protect an occupant in the event of a side collision of a vehicle.

[0003]

In order to solve this problem, a vehicle seat according to the present invention is connected to left and right seat brackets supported on the floor of the vehicle and rear end portions of both seat brackets, respectively. Side frames extending upward, upper frames whose ends are connected to upper portions of both side frames, a back cushion body attached to the side frames, and a predetermined value or more inward in the vehicle width direction on the side frames. When the pressing force is applied, the side frame tilts inward in the vehicle width direction, and has a weakened portion of deformation provided at or near the connecting portion between the side frame and the upper frame.

That is, when the seat back receives a pressing force inward in the vehicle width direction from the side surface portion of the vehicle body which is deformed toward the inside of the vehicle during a side collision of the vehicle, the side frame and the upper frame of the seat back frame are separated from each other. The side frame tilts inward in the vehicle width direction and the upper frame displaces inward in the vehicle width direction due to deformation of the weak points provided in the connection part or in the vicinity thereof, and the seat back tilts inward in the vehicle width direction. Therefore, the occupant sitting on the seat is also urged by the displacement of the seat back, with the upper half of the body inward in the vehicle width direction.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, each embodiment of the present invention shown in the drawings will be described with the same reference numerals being given to the same parts. 1 and 2, the floor 1 of the passenger car
Left and right lower rails 2 extending in the front-rear direction of the vehicle are bolted to the upper part, and upper rails 3 are mounted on the respective lower rails 2 so as to be slidable in the front-rear direction of the vehicle. A side sill side seat cushion bracket 4 and a passenger compartment center side seat cushion bracket 5 each having a substantially L-shaped vertical cross section are arranged on the upper side, and their respective lower flanges 6 are arranged at appropriate intervals in the front-rear direction of the vehicle. The rivets 7 are fixed to the upper surface of the upper rail 3, respectively.

Both seat cushion brackets 4,
The front and rear parts of 5 are connected by a pipe-shaped seat cross member 8 extending in the vehicle width direction, and a cushion body (not shown) is attached to both seat cushion brackets 4, 5 and, if necessary, the seat cross member 8, and the left front seat A seat cushion is formed.

On the other hand, near the upper portion of the rear seat cross member 8, both ends of the reclining shaft 10 extending in the vehicle width direction have left and right seat cushion brackets 4, 5 respectively.
The left and right side frames 11 each having a substantially U-shaped cross-section are fixed to the reclining shaft 10 at their lower portions and extend upward, respectively, and extend to the upper and lower sides of the substantially horizontal upper frame 12, respectively. The upper end portions are connected to each other, and a seat back frame 13 is configured by the both side frames 11, the upper frame 12, and the reclining shaft 10, and a back cushion body (not shown) is attached to the seat back frame 13 to form a left front seat back,
Seat cushion bracket 4 and reclining shaft 1
A reclining device (not shown) is attached between 0 and so that the seat back can be tilted with respect to the seat cushion to a desired tilt angle about the reclining shaft 10.

Further, a connecting corner portion between the upper end portion of each side frame 11 and the end portion of the upper frame 12 or a portion in the vicinity thereof is partially reduced in cross-sectional shape, or
The rigidity toward the inside in the vehicle width direction is reduced by the formation of the slits or the hollow portions, or the members having relatively small rigidity toward the inside in the vehicle width direction are the upper ends of the side frames 11 and the ends of the upper frame 12. A hinge having a pivot shaft extending in the front-rear direction of the vehicle at or near the corner portion where the upper end of each side frame 11 and the end portion of the upper frame 12 are connected to each other to form a corner portion. Are provided, and when a pressing force of a predetermined value or more is applied to the seat back inward in the vehicle width direction, first deformation weak points a that are respectively deformed inward in the vehicle width direction are formed. A second deformation weakening portion b toward the inner side in the vehicle width direction having the same structure as the first deformation weakening portion a is also formed in the lower portion of each side frame 11 near the upper side. Reference numeral 20 denotes a side surface of the vehicle body such as a center pillar and a door.

When another vehicle or the like collides with the vehicle from the side, the collision energy causes the side surface portion 20 of the vehicle body to be deformed toward the interior of the vehicle as shown by the chain double-dashed line in FIG. Since the upper portion of the side surface portion 20 is relatively inclined toward the vehicle compartment center side, the deformed vehicle body side surface portion 20 is displaced toward the vehicle compartment center side as it goes upward, and
When a pressing force of a predetermined value or more acts on the seat back from the inside in the vehicle width direction, the upper and lower first deformation weak points a and the second deformation weak points b are respectively deformed in response to the pressing force, and thus, as shown in FIG.
Each side frame 1 as indicated by the two-dot chain line
Between the upper end of 1 and the end of the upper frame 12, and the lower part of each side frame 11 are bent respectively, each side frame 11 is tilted toward the vehicle interior, and the upper frame 12 is displaced toward the vehicle interior. Therefore, the seat back is entirely tilted inward in the vehicle width direction.

Therefore, the occupant sitting in the left front seat is also urged to move inward in the vehicle width direction along with the displacement of the seat back, so that the occupant is deformed toward the inside of the vehicle. As a result, it becomes easier for the occupant to keep a distance, the risk of injury to the occupant during a side collision is reduced, and the occupant can be easily protected.

In the above embodiment, the second deformation weak points b toward the inner side in the vehicle width direction are formed at the lower portions of the side frames 11, respectively, but instead of this, the lower portions of the side frames 11 are formed. Seat cushion brackets 4, 5, which are connected via a reclining shaft 10.
In particular, even if a third deformation weakening point c inward in the vehicle width direction is formed in the lower part of them, as shown in FIG.
As shown by the dotted line, the vehicle body side surface portion 20 at the time of a side collision.
Is displaced toward the passenger compartment center side as it goes upward, and if a pressing force of a predetermined value or more acts on the seat cushion and / or the seat back inward in the vehicle width direction, the upper and lower parts are correspondingly moved up and down as in the case of the above-described embodiment The first deformation weak point a and the third deformation weak point c are respectively deformed, and the space between the upper end of each side frame 11 and the end of the upper frame 12 and the seat cushion brackets 4 and 5 are bent respectively. As a result of the side frame 11 tilting toward the vehicle interior and the upper frame 12 being displaced toward the vehicle interior, it is possible to achieve the same effect as the above-described embodiment, and the above-described embodiments. Although it relates to the left front seat, it can be applied to each of the right front seats in the same way by having a completely symmetrical configuration in the vehicle width direction, and the same effect can be obtained. It is needless to say.

[0012]

In the vehicular seat according to the present invention, when the seat back receives a pressing force of a predetermined value or more inward in the vehicle width direction from the side surface portion of the vehicle body which is deformed inwardly of the vehicle in a side collision of the vehicle, the seat back. Deformation such that the frame tilts inward in the vehicle width direction The weak point part deforms, and the seat back tilts inward in the vehicle width direction, so that the occupant sitting in that seat also displaces the upper back body due to the displacement of the seat back. Is urged inward in the vehicle width direction. Therefore, the risk of the occupant being injured from the side surface portion of the vehicle body deformed toward the vehicle interior can be reduced, and the occupant can be easily protected.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a main part in an embodiment of the present invention.

FIG. 2 is a front view of a main part of the above embodiment.

FIG. 3 is a front view of a main part according to another embodiment of the present invention.

[Explanation of symbols]

 4 seat cushion bracket 5 seat cushion bracket 6 lower flange 7 rivet 8 seat cross member 10 reclining shaft 11 side frame 12 upper frame 13 seat back frame 20 vehicle body side part

Claims (7)

[Claims] 1. Right and left seat brackets supported on a floor of a vehicle, side frames connected to rear end portions of both seat brackets and extending upward, respectively, and end portions connected to respective upper portions of the both side frames. The upper frame, the back cushion body mounted on the side frame, and the side frame are tilted inward in the vehicle width direction when a pressing force is applied to the side frame inward in the vehicle width direction. A vehicle seat having a weakened portion provided at or near a connecting portion between the side frame and the upper frame. 2. The vehicle seat according to claim 1, wherein the deformation weakening portion is formed by partially reducing the cross-sectional shape. 3. The vehicle seat according to claim 1 or 2, wherein the deformation weak point portion is formed by forming a slit or a hollow portion. 4. The vehicle seat according to claim 1, wherein the deformation weak point portion is constituted by a hinge having a pivot shaft extending in the front-rear direction of the vehicle. 5. The second inner side in the vehicle width direction at a lower portion of the side frame according to any one of claims 1 to 4.
When the seat back has a deformation weak point portion and a pressing force of a predetermined value or more is applied to the seat back inward in the vehicle width direction, the side frame is deformed by the deformation of the second deformation weak point portion with the vicinity of the second deformation weak point portion serving as a fulcrum. A vehicle seat configured to tilt inward in the width direction. 6. The seat bracket according to any one of claims 1 to 4, wherein the seat bracket has a second deformation weak point inward in the vehicle width direction, and the seat cushion and / or the seat back is predetermined inward in the vehicle width direction. A vehicle seat configured such that, when a pressing force of a value or more is applied, the side frame tilts inward in the vehicle width direction with the vicinity of the second deformation weak point portion as a fulcrum due to the deformation of the second deformation weak point portion. 7. The vehicle body according to claim 5, wherein when the seat bracket is pressed inward in the vehicle width direction by a pressing force of a predetermined value or more, the left and right side frames tilt inward in the vehicle width direction substantially parallel to each other. A vehicle seat configured as described above.