JP6880390B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat having an airbag on the side.

A vehicle seat provided with a side airbag device that inflates and deploys an airbag provided on the side of the vehicle seat in the event of a side collision of the vehicle to protect an occupant is known (for example, the following patent documents). 1).

Japanese Patent No. 569567

In the above-mentioned prior art, the airbag module is attached to a bracket extending from the side frame to the front of the seat. Therefore, the workability when attaching the airbag module to the seat frame from the rear side of the seat is low.

The present invention has been made in view of the above problems, and an object of the present invention is to improve workability when mounting an airbag module arranged on the side of a vehicle seat from the rear side of the seat. Is to provide.

According to the vehicle seat according to the present invention, the above-mentioned problems include a side frame constituting a side portion of the seat back frame, a mounting portion mounted on the inner side surface of the seat of the side frame, and a rearward protrusion from the mounting portion. The rear projecting portion includes a bracket having the rear projecting portion, and an airbag module fixed to the rear projecting portion, and the rear projecting portion includes a rear extending portion extending rearward from the mounting portion and the rear extending portion. It has an outer extending portion extending from the rearward extending portion in the seat outside, and the outer extending portion, wherein the airbag module is solved by attached Rukoto.
According to the vehicle seat described above, since the bracket for mounting the airbag module is mounted on the inner surface of the side frame, the width of the mounting portion of the airbag module in the left-right direction becomes compact. Further, since the airbag module is mounted behind the mounting portion between the bracket and the side frame, workability when assembling the airbag module to the bracket from the rear of the seat can be improved.
Further, by allowing the airbag module to be attached to the outer extension portion extending from the rear extension portion to the outside of the seat, the orientation of the portion of the bracket to be attached to the pipe frame and the portion to be attached to the airbag module. Can be different. As a result, it is possible to suppress interference between the bracket and the pipe frame and the mounting location of the bracket and the airbag module, and improve the mounting workability.

Further, in the vehicle seat, the side frame has a cylindrical pipe frame and a plate-shaped plate frame attached to the lower part of the pipe frame, and the airbag module is the plate frame. It may be attached to the side surface on the outside of the seat.
This allows the airbag module to be attached to both the bracket and the outer side of the seat of the plate frame. As a result, the attachment of the airbag module to the seat cushion frame can be strengthened as compared with the case where the airbag module is attached to either the bracket or the plate frame.

Further, in the vehicle seat, the bracket may be attached to the pipe frame below the joint portion between the pipe frame and the plate frame.
By doing so, it is possible to suppress the improvement in the rigidity of the side frame by attaching the bracket to the portion of the side frame below the joint portion between the pipe frame and the plate frame, that is, a portion that does not overlap with the joint portion. As a result, proper shock absorption of the side frame can be maintained even when the bracket is attached.

Further, in the vehicle seat, the airbag module has an airbag, an inflator for supplying gas to the airbag, a case for covering the inflator and the airbag, and a protrusion protruding from the case. A retainer may be provided, and the outer extending portion of the bracket and the protruding portion of the retainer may be fixed.
By doing so, the retainer and the bracket protruding from the airbag module can be fixed. As a result, the workability of attaching the airbag module to the bracket can be improved.

Further, in the vehicle seat, the outer extending portion of the bracket and the protruding portion of the retainer are fixed by fastening nuts to bolts penetrating both of the bracket, and the protruding portion of the retainer. May be formed with an opening through which the bolt is inserted.
In this way, the retainer and bracket of the airbag module can be easily fixed using bolts and nuts. This facilitates the work of attaching the airbag module to the bracket.

Further, in the vehicle seat, the protruding portion of the retainer has an inner extending portion extending toward the inside of the seat behind the side frame, and the inner extending portion and the outer extending portion. May be fixed.
By doing so, the retainer and the bracket of the airbag module can be easily fixed from the rear of the seat using bolts and nuts. This facilitates the work of attaching the airbag module to the bracket.

Further, in the vehicle seat described above, the end portion of the bolt may be directed rearward, and the nut may be a cap nut covering the end portion of the bolt.
This facilitates the work of fastening the nut to the bolt from the rear of the seat.
Further, since the end portion of the bolt is covered with the cap nut, damage to the inside of the seat due to the end portion of the bolt can be suppressed.

Further, in the above-mentioned vehicle seat, the opening of the retainer may be provided over the end portion inside the seat.
By doing so, the opening provided in the retainer can be fitted into the bolt from the outside of the seat. This facilitates the work of attaching the airbag module to the bracket.

Further, the vehicle seat is provided with a seat back pad that covers the seat back frame, and the seat back pad has a storage portion that opens to the side toward the outside of the seat and stores the airbag module. Good as a matter of fact.
By doing so, even after the seat back pad is attached to the seat back frame, the airbag module can be arranged and attached to the accommodating portion of the seat back pad. In this way, since the airbag module can be attached after the seat back pad is attached to the seat back frame, the position of the airbag module does not shift when the seat back pad is attached. As a result, the placement accuracy of the airbag module can be improved.

According to the present invention, it is possible to improve workability when the airbag module arranged on the side of the vehicle seat is attached from the rear side of the seat.

According to one aspect of the present invention, the attachment of the airbag module to the seat cushion frame can be strengthened.

According to one aspect of the present invention, proper shock absorption of the side frame can be maintained even when the bracket is attached.

According to one aspect of the present invention, it is possible to suppress interference between the bracket and the pipe frame and the mounting location of the bracket and the airbag module, and improve the mounting workability.

According to one aspect of the present invention, the workability of attaching the airbag module to the bracket can be improved.

According to one aspect of the present invention, the retainer and bracket of the airbag module can be easily fixed using bolts and nuts.

According to one aspect of the present invention, the retainer and bracket of the airbag module can be easily fixed from the rear of the seat using bolts and nuts.

According to one aspect of the present invention, damage to the inside of the seat due to the end of the bolt can be suppressed.

According to one aspect of the present invention, an opening provided in the retainer can be fitted into the bolt from the outside of the seat.

According to one aspect of the present invention, the airbag module can be arranged and attached to the accommodating portion of the seat back pad even after the seat back pad is attached to the seat back frame.

It is a perspective view of the vehicle seat which concerns on this embodiment. It is a perspective view of a seat back frame. It is a right side view of a seat back frame. It is a left side view of a seat back frame. It is an enlarged view of the attachment point to the pipe frame of an airbag module. FIG. 5 is a sectional view taken along line VI-VI of FIG. FIG. 5 is a sectional view taken along line VII-VII of FIG. It is an enlarged view of the attachment part to the plate frame of an airbag module. It is IX-IX sectional view of FIG. It is a perspective view which shows the modification which changed the arrangement of the inflator in a seat back frame.

Hereinafter, the vehicle seat S according to the embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to FIGS. 1 to 10. The vehicle seat S according to the present embodiment is a vehicle seat provided with an airbag device on the side portion.
It should be noted that the embodiments described below are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. That is, the shapes, dimensions, arrangements, etc. of the members described below can be changed and improved without departing from the gist of the present invention, and it goes without saying that the present invention includes equivalents thereof.

In the following description, the "front-rear direction" means the front-rear direction when viewed from the seated person of the vehicle seat S, and is a direction that coincides with the traveling direction of the vehicle.
The "seat width direction" means the width direction of the vehicle seat S, and coincides with the left-right direction of the vehicle seat S when viewed from the seated person.
Further, the "vertical direction" means the height direction of the vehicle seat S, which coincides with the vertical direction when the vehicle seat S is viewed from the front.

[Structure of vehicle seat S]
As shown in FIG. 1, the vehicle seat S includes a seat back S1 serving as a backrest portion, a seat cushion S2 serving as a seating portion, and a headrest S3 arranged above the seat back S1 to support the occupant's head. Be prepared.

The seat back S1 is configured by covering the seat back frame 10 which is the skeleton shown in FIG. 2 with the seat back pad 1 and further covering the seat back pad 1 with the skin 2.

An airbag module 30 and an airbag module 40 are provided inside the seat back S1 on the side side, respectively.
In the present embodiment, the airbag module 40 is closer to the vehicle door than the airbag module 30. That is, the airbag module 30 is a far-side airbag device, and the airbag module 40 is a near-side airbag device.
The airbag module 30, which is a far-side airbag device, protects the occupant of the vehicle seat S from a collision with an occupant seated next to it.
Further, the airbag module 40, which is a near-side airbag device, protects the occupant of the vehicle seat S from a collision with the vehicle door or the outside of the vehicle.
In the present embodiment, an example in which the airbag module 30 which is a far side airbag device is provided on the right side of the vehicle seat S and the airbag module 40 which is a near side airbag device is provided on the left side will be described. It is determined according to the arrangement of the vehicle seat S in the vehicle, and is not limited to the above example.

[Structure of seat back S1]
Next, the configuration of the seat back S1 will be described with reference to FIGS. 2 to 9.
FIG. 2 shows a perspective view of the seat back frame 10 which is the skeleton of the seat back S1.
As shown in FIG. 2, the seat back frame 10 is erected between the inverted U-shaped pipe frame 11, the pair of plate frames 12 forming the end portions in the seat width direction, and the lower end portions of the pair of plate frames 12. The lower frame 15 is provided.

The side portion 11A of the pipe frame 11 and the upper end portion of the plate frame 12 are arranged so as to overlap each other in the vertical direction, and the side portion 11A of the pipe frame 11 and the upper end portion of the plate frame 12 are welded portions 50A and welded portions. It is joined at the welded part including 50B.
In the present embodiment, the side portion of the seat back frame 10 composed of the side portion 11A of the pipe frame 11 and the plate frame 12 is referred to as a side frame 13.

The seat back frame 10 is provided with a cross member 14 on which an upper portion of the pipe frame 11 (that is, an upper portion of the side portion 11A) is erected.

The airbag module 30 is attached to the right side frame 13 via the bracket 20. The bracket 20 is provided below the welded portion 50A and the welded portion 50B, which are the joints between the pipe frame 11 and the plate frame 12, and prevents the rigidity of the joints from being strengthened more than necessary. doing. As a result, the shock absorption of the seat back frame 10 is not hindered by the attachment of the bracket 20 and the airbag module 30.

[Mounting structure of airbag module 30]
Hereinafter, the structure of attaching the airbag module 30 to the bracket 20 will be described in detail with reference to FIGS. 3, 5 to 9.

As shown in FIGS. 5 and 6, through holes 11B and 11C arranged vertically are formed on the inner side surface of the side portion 11A of the right pipe frame 11 on the inner side of the seat.
Here, the bracket 20 includes a mounting portion 21 that is attached to the through hole 11C of the pipe frame 11, and a rear protruding portion 22 that protrudes rearward from the mounting portion 21. The rear protruding portion 22 includes a rear extending portion 22A extending rearward from the mounting portion 21 and an outer extending portion 22B extending outward from the rear extending portion 22A.

The bracket 20 is fixed to the pipe frame 11 by fastening the screw 23 to the through hole formed in the mounting portion 21 of the bracket 20 and the through hole 11C formed in the bracket 20.

As shown in FIGS. 3, 5 and 7, the airbag module 30 includes an airbag 31, an inflator 32, and a retainer 34 inside the case 33.
The inflator 32 generates gas when an operation signal is input from a sensor that detects a vehicle collision via a harness 35. Then, the inflator 32 injects the generated gas into the airbag 31 to swell and deploy the airbag 31.

The retainer 34 is a plate member for attaching the airbag module 30 to the seat back frame 10. The retainer 34 includes a flat plate portion 34D facing the outer surface 12A of the plate frame 12 and a protruding portion 34A protruding from the case 33.

As shown in FIG. 8, the stud bolts 36A and the stud bolts 36B provided on the inflator 32 project to the inside of the seat through the flat plate portion 34D of the retainer 34. The stud bolt 36A and the stud bolt 36B are each passed through a through hole formed in the plate frame 12.
Then, the inflator 32, the retainer 34, and the plate frame 12 are fixed to the stud bolts 36A by fastening nuts from the inside of the seat of the plate frame 12.
On the other hand, the inflator 32 and the retainer 34 are fixed to the stud bolt 36B by fastening the nut 37. The through hole of the plate frame 12 through which the stud bolt 36B is passed has a diameter larger than that of the nut 37, and the retainer 34 and the plate frame 12 are not fixed at this portion.
Further, a force cloth clip 60 for fixing the force cloth at a position where the stud bolt 36A and the stud bolt 36B are vertically sandwiched is attached to the plate frame 12. Here, the force cloth is a member for guiding the deployment direction of the airbag 31 by covering the side portion of the airbag module 30.

As shown in FIG. 5, the outer extending portion 22B of the bracket 20 is attached to the protruding portion 34A of the retainer 34.
Specifically, as shown in FIGS. 5 and 7, the projecting portion 34A has an inner extending portion 34B extending inward of the seat, and the inner extending portion 34B extends from the center thereof to the inner edge of the seat. The opening 34C is formed.
Then, the bolt 24 is passed through the through hole formed in the outer extending portion 22B of the bracket 20 and the opening 34C, and the cap nut 25 is fitted and fastened to the end portion 24A of the bolt 24. As a result, the bracket 20 and the retainer 34 are fixed.
According to the above configuration, the end portion 24A of the bolt 24 faces the rear of the seat, and the cap nut 25 can be fitted from the rear of the seat. Further, since the end portion 24A of the bolt 24 is covered with the cap nut 25, it is possible to prevent the end portion 24A of the bolt 24 from damaging the inside of the seat back S1.

As shown in FIG. 9, in the seat back pad 1 of the seat back S1, a storage portion 1A in which the pad member is hollowed out is provided on the side portion on the side where the airbag module 30 is arranged. The airbag module 30 is arranged in the storage portion 1A.
In this way, by providing the storage portion 1A for arranging the airbag module 30 on the seat back pad 1, in the seat back S1, after assembling the seat back pad 1 to the seat back frame 10, the airbag module 30 is seated. It can be attached to the back frame 10. Therefore, the displacement of the airbag module 30 can be suppressed as compared with the case where the seat back pad 1 is put on the seat back frame 10 after the airbag module 30 is attached to the seat back frame 10.

Next, the attachment structure of the airbag module 40 to the seat back frame 10 will be described. The airbag module 40 is attached facing the outside of the side plate 41 attached to the side frame 13 on the left side of the seat back frame 10.

As shown in FIG. 9, the side plate 41 is fixed to the pipe frame 11 by screwing the screw 42 into the through hole inside the seat of the pipe frame 11 and the through hole provided in the side plate 41.
Further, as shown in FIG. 4, the position of the upper end of the airbag module 30 is higher than the upper end of the side plate 41 to which the airbag module 40 is attached. That is, the upper end of the airbag module 30 is higher than the upper end of the airbag module 40.

According to the vehicle seat S described above, since the bracket 20 for mounting the airbag module 30 is mounted on the inner side surface of the side frame 13, the width of the mounting portion of the airbag module 30 in the left-right direction is compact. Become. Further, since the airbag module 30 is attached to the rear of the seat from the attachment portions of the bracket 20 and the side frame 13, workability when assembling the airbag module 30 to the bracket 20 from the rear of the seat can be improved.

Further, according to the vehicle seat S, the airbag module 30 can be attached to both the bracket 20 and the outer surface 12A of the plate frame 12. As a result, the attachment of the airbag module 30 can be made stronger than when the airbag module 30 is attached to either the bracket 20 or the plate frame 12.

Further, according to the vehicle seat S, the bracket 20 is located below the joint portion (welded portion 50A, welded portion 50B) between the pipe frame 11 and the plate frame 12 in the side frame 13, that is, at a position not overlapping the above-mentioned joint portion. By attaching the above, it is possible to suppress the improvement in the rigidity of the side frame 13. As a result, appropriate shock absorption of the side frame 13 can be maintained even when the bracket 20 is attached.

Further, according to the vehicle seat S, in the bracket 20, the orientation of the portion attached to the pipe frame 11 and the portion attached to the airbag module 30 can be different. As a result, it is possible to suppress interference between the bracket 20 and the pipe frame 11 and the mounting location between the bracket 20 and the airbag module 30 and improve the mounting workability.

Further, according to the vehicle seat S, the retainer 34 and the bracket 20 of the airbag module 30 can be easily attached from the rear of the seat by using the bolt 24 and the cap nut 25.
Further, since the end portion 24A of the bolt 24 is covered with the cap nut 25, damage to the seat back pad 1 due to the end portion 24A of the bolt 24 can be suppressed.

Further, according to the vehicle seat S, the opening 34C of the retainer 34 can be fitted into the bolt 24 from the outside of the seat. As a result, the workability of attaching the airbag module 30 can be improved.

Further, according to the vehicle seat S, since the storage portion 1A for accommodating the airbag module 30 is provided on the side portion of the seat back pad 1, even after the seat back pad 1 is attached to the seat back frame 10, the seat is seated. The airbag module 30 can be arranged and attached to the storage portion 1A of the back pad 1. In this way, since the airbag module 30 can be attached after the seat back pad 1 is attached to the seat back frame 10, it is possible to prevent the airbag module 30 from being displaced when the seat back pad 1 is attached. it can. As a result, the placement accuracy of the airbag module 30 can be improved.

[Other Embodiments]
Moreover, the present invention is not limited to the above-described embodiment.
For example, as shown in FIG. 10, the inflator 32 may be arranged outside the case 33 of the airbag module 30. At this time, the inflator 32 is arranged between the front wall portion 15A located in front of the seat in the lower frame 15 and supporting the waist portion of the occupant and the rear wall portion 15B located behind the seat.
The stud bolt 36A and the stud bolt 36B attached to the inflator 32 are passed through a through hole provided in the rear wall portion 15B and fixed to the rear wall portion 15B by a nut.
Further, the inflator 32 and the airbag 31 are connected by a pipe 38, and the gas generated from the inflator 32 is injected into the airbag 31 through the pipe 38.
By arranging the inflator 32 at the position of the lower frame 15 in this way, the weight of the upper part of the seat back frame 10 can be suppressed. As a result, deformation of the seat back frame 10 at the time of a vehicle collision can be suppressed.
Further, by arranging the inflator 32 between the front wall portion 15A and the rear wall portion 15B of the lower frame 15, the inflator 32 can be protected from an external impact.

S Vehicle seat S1 Seat back S2 Seat cushion S3 Headrest 1 Seat back pad 1A Storage part 2 Skin 10 Seat back frame 11 Pipe frame 11A Side part 11B Through hole 11C Through hole 12 Plate frame 12A Outer side surface 13 Side frame 14 Cross member 15 Lower frame 15A Front wall 15B Rear wall 20 Bracket 21 Mounting 22 Rear protrusion 22A Rear extension 22B Outer extension 23 Screw 24 Bolt 24A End 25 Cap nut 30 Airbag module 31 Airbag 32 Inflator 33 Case 34 Retainer 34A Projection 34B Inner extension 34C Opening 34D Flat plate 35 Harness 36A Stud bolt 36B Stud bolt 37 Nut 38 Pipe 40 Airbag module 41 Side plate 42 Screw 50A Weld 50B Weld 60 Force clip

Claims (9)

The side frames that make up the sides of the seat back frame and
A bracket having a mounting portion mounted on the inner side surface of the seat of the side frame and a rear protruding portion projecting rearward from the mounting portion.
An airbag module fixed to the rear protrusion is provided .
The rear protruding portion has a rear extending portion extending rearward from the mounting portion and an outer extending portion extending rearward from the rear extending portion to the outside of the seat.
Wherein the outer extending portion, a vehicle seat, wherein Rukoto the airbag module is installed. The side frame has a cylindrical pipe frame and a plate-shaped plate frame attached to the lower part of the pipe frame.
The vehicle seat according to claim 1, wherein the airbag module is attached to a side surface of the plate frame on the outer side of the seat. The vehicle seat according to claim 2, wherein the bracket is attached to the pipe frame below the joint portion between the pipe frame and the plate frame. The airbag module
With airbags
An inflator that supplies gas to the airbag and
A case that covers the inflator and the airbag,
A retainer having a protrusion protruding from the case.
The vehicle seat according to any one of claims 1 to 3 , wherein the outer extending portion of the bracket and the protruding portion of the retainer are fixed. The outer extending portion of the bracket and the protruding portion of the retainer are fixed by fastening nuts to bolts penetrating the two.
The vehicle seat according to claim 4 , wherein an opening through which the bolt is inserted is formed in the protruding portion of the retainer. The protrusion of the retainer has an inward extension that extends toward the inside of the seat behind the side frame.
The vehicle seat according to claim 5 , wherein the inner extending portion and the outer extending portion are fixed. The end of the bolt faces rearward and
The vehicle seat according to claim 6 , wherein the nut is a cap nut that covers an end portion of the bolt. The vehicle seat according to claim 6 or 7 , wherein the retainer opening is provided over the inner end of the seat. A seat back pad covering the seat back frame is provided.
The vehicle seat according to any one of claims 1 to 8 , wherein the seat back pad has a storage portion that opens toward the outside of the seat on the side portion and stores the airbag module.

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