JP2019031133A - Vehicle seat - Google Patents

Abstract

To improve stability of fixture of a support member supporting an airbag module to a side frame.SOLUTION: A vehicle seat includes: side frames 13 forming side parts of a seat frame; a seat pad disposed at the outer side of the side frames 13; an airbag module disposed between the seat pad and the side frame 13; and a support member 30 which supports the airbag module. The support member 30 has: a fixed part 36 fixed to the side frame 13; and an engagement part 38 which is engaged with an end part of the side frame 13. The engagement part 38 is provided below the fixed part 36.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat including a side airbag device.

  2. Description of the Related Art A vehicle seat including a side airbag device that inflates and deploys an airbag provided on a side portion of a vehicle seat at the time of a side collision of the vehicle to protect an occupant is known (for example, the following patent document) 1).

JP2015-163488A

  In the above-described prior art, the side airbag device is attached to the side frame via a support member fixed to the side frame. Since the support member is fixed to the side frame only on the upper side, the fixing stability is not sufficient.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat that can improve the stability of fixing of a support member that supports an airbag module to a side frame. is there.

  According to the vehicle seat of the present invention, the above-described problem is a side frame that forms a side portion of the seat frame, a seat pad that is disposed outside the side frame, and a space between the seat pad and the side frame. And a support member that supports the airbag module, wherein the support member is fixed to the side frame and is engaged with an end of the side frame. A locking portion, and the locking portion is solved by being provided below the fixing portion.

According to the vehicle seat described above, the support member is locked to the end portion of the side frame, whereby the stability of fixing the support member to the side frame can be improved.
Thereby, a passenger | crew and an airbag module can be supported stably.

In the above vehicle seat, it is preferable that the locking portion is locked to a front end portion of the side frame.
By carrying out like this, the proof stress to the load applied to the front side of a support member can be improved. Thereby, a passenger | crew can be supported stably in the front part of a sheet | seat.

The vehicle seat includes a skin that covers the seat pad, the airbag module includes an airbag and an inflator that injects gas into the airbag, and the skin is deployed of the airbag. The seat pad has a fragile portion provided in proximity to the rupture portion of the skin, the support member extends toward the fragile portion, and the fragile portion It is preferable that the support member is attached to the side frame in a state of facing the side plate of the side frame.
By doing so, the force from the outside of the seat to the inside acts, so that the front extension portion moves inward while being supported by the side frame. Thereby, the front extension part of a supporting member can be made to act so that a weak part may be greatly expanded.

In the above vehicle seat, it is preferable that the support member has a rear wall portion disposed behind the airbag module.
By doing so, the shape of the rear side of the sheet can be maintained. Further, the airbag module can be protected from the load on the rear side.

Said vehicle seat WHEREIN: It is suitable for the said front extension part that a cross section is L-shaped.
By carrying out like this, a front extension part can be arrange | positioned along an airbag module. Thereby, the space in the sheet can be effectively used.

In the above vehicle seat, the break portion is preferably a portion where a slit is formed in the seat pad.
By doing so, the weak portion can be provided in the seat pad with a simple configuration.

In the above vehicle seat, the support member includes an outer plate arranged outside the side frame, and an inner plate arranged inside the side frame, and the inner plate It is preferable to have a fixing portion.
By carrying out like this, the supporting member can strengthen the yield strength to the load from the inside of a sheet.

In the vehicle seat described above, it is preferable that the inner plate has the locking portion, and the fixing portion is provided above the locking portion.
By carrying out like this, fixation to the side frame of a supporting member can be stabilized.

In the above vehicle seat, it is preferable that the side frame has a plate-like frame including a flat side plate, and the front end portion is bent inward of the seat.
By carrying out like this, fixation with a support member and the front-end part of a side frame can be stabilized.

According to the present invention, it is possible to improve the stability of fixing the support member to the side frame.
According to the present invention, it is possible to improve the yield strength against the load applied to the front side of the support member.
According to this invention, the front extension part of a support member can be made to act so that a weak part may be greatly expanded.
According to the present invention, the shape of the rear side of the sheet can be maintained.
According to the present invention, the space in the sheet can be used effectively.
According to the present invention, the weak portion can be provided in the seat pad with a simple configuration.
According to the present invention, the support member can reinforce the load bearing capacity from the inside of the seat.
According to the present invention, the fixing of the support member to the side frame can be stabilized.
According to the present invention, the fixing between the support member and the front end portion of the side frame can be stabilized.

It is a perspective view of a vehicle seat. It is a perspective view of a seat back frame. It is an outer side view of the left side frame. It is an inner side view of the left side frame. It is VV sectional drawing of FIG. It is VI-VI sectional drawing of FIG.

Hereinafter, a vehicle seat S as a vehicle seat according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS. 1 to 6.
The embodiment described below is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the shape, dimensions, arrangement, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and the present invention naturally 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 and is the direction that coincides with the traveling direction of the vehicle. The “seat width direction” means the lateral width direction of the vehicle seat and coincides with the left-right direction when viewed from the seated person of the vehicle seat. Further, the “height direction” means the height direction of the vehicle seat, and coincides with the vertical direction when the vehicle seat is viewed from the front.

First, the outline of each of FIGS. 1 to 6 will be described.
FIG. 1 is a perspective view of a vehicle seat S. FIG.
FIG. 2 is a perspective view of the seat back frame 10.
FIG. 3 is an outer side view of the left side frame 13.
FIG. 4 is an inner side view of the left side frame 13.
FIG. 5 is a VV cross-sectional view of FIG.
6 is a cross-sectional view taken along the line VI-VI in FIG.

  As shown in FIG. 1, the vehicle seat S includes a seat back S <b> 1 serving as a backrest portion, a seat cushion S <b> 2 serving as a seating portion, and a headrest S <b> 3 arranged on the upper portion of the seat back S <b> 1 and supporting a passenger's head. .

The seat back S1 is configured by covering the seat back frame 10 serving as a skeleton shown in FIG. 2 with a seat pad 40 and further covering the seat pad 40 with a skin 50.
And the airbag module 20 is provided inside the left side part of seat back S1. Specifically, as shown in FIG. 5, the airbag module 20 includes a seat pad 40 (first pad portion 40 </ b> A) and a side frame 13 (a connecting portion between the pipe frame 11 and the plate frame 12). Arranged.

[Description of Airbag Module 20]
The airbag module 20 is a device that protects an occupant by absorbing an impact at the time of a vehicle collision. The airbag module 20 may be a caseless airbag module without a module case, or may have a module case, and is not particularly limited.

In the present embodiment, the airbag module 20 includes an airbag 21 and an inflator 22, and both the airbag 21 and the inflator 22 are held by being wrapped in a wrap material.
Here, the inflator 22 is a device that generates gas in response to an input signal from a harness (not shown). Specifically, when a sensor provided in the vehicle detects a collision, an operation signal is input to the inflator 22 via the harness, whereby the inflator 22 generates gas and injects the gas into the airbag 21. To do. Thus, the airbag 21 is inflated and deployed when the vehicle collides.

[Description of Seat Back Frame 10]
Next, the configuration of the seat back frame 10 to which the airbag module 20 is attached will be described. The seat back frame 10 is a skeleton portion of the seat back S1 portion of the seat frame forming the skeleton of the vehicle seat S. That is, the seat back frame 10 is a part of the seat frame.

  As shown in FIG. 2, the seat back frame 10 includes an inverted U-shaped pipe frame 11, a pair of plate frames 12 that respectively form end portions in the seat width direction, and a lower end portion of the pair of plate frames 12. And a lower frame 15 installed on the frame.

  The upper part of the pipe frame 11 constitutes an upper frame 11A of the seat back frame 10. Two headrest holders 16 are formed on the upper frame 11A. The headrest S3 is attached to the headrest holder 16.

The side part 11B of the pipe frame 11 and the upper end part of the plate-like frame 12 are arranged so as to overlap each other in the vertical direction, and the side part 11B of the pipe frame 11 and the upper end part of the plate-like frame 12 are joined by welding. ing.
In the present embodiment, the side portion of the seat back frame 10 constituted by the side portion 11 </ b> B 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 frame 14 for laying the upper part of the pipe frame 11. Here, the “upper part of the pipe frame 11” is defined as an upper part of the pipe frame 11 than the plate frame 12. In other words, the “upper part of the pipe frame 11” is a part of the pipe frame 11 that is bent toward the upper frame 11A.

  The airbag module 20 is attached to the left side frame 13 via a support member 30. Hereinafter, the support member 30 will be described.

[Description of Support Member 30]
The support member 30 supports the occupant in the seat width direction from an external force applied to the vehicle. Further, the support member 30 supports the airbag module 20 and also functions to guide the deployment direction of the airbag 21 of the airbag module 20. That is, in this embodiment, the support member 30 functions as a webbing instead of the webbing that is generally provided for guiding the airbag deployment direction.
The support member 30 may be formed of a resin such as TPO (Thermo Polyolefin) or TPU (Thermoplastic Polyurethane).
Hereinafter, the details of the configuration of the support member 30 will be described.

  As shown in FIGS. 2 to 6, the support member 30 includes an outer plate 31, an upper wall portion 32, a rear wall portion 33, a front extending portion 34, an inner plate 35, and a rib 39.

The outer plate 31 is disposed on the outer side of the side frame 13 in the seat width direction. Specifically, the outer plate 31 is attached to the side frame 13 while facing the side plate 12A of the plate frame 12.
As shown in FIGS. 2 and 3, a first hole 31 </ b> A and a second hole 31 </ b> B are formed in the lower portion of the outer plate 31. The first hole 31 </ b> A and the second hole 31 </ b> B are provided at positions facing the mounting holes of the airbag module 20 formed in the plate frame 12.

As shown in FIG. 2, stud bolts 22A extending from the inflator 22 of the airbag module 20 are inserted through the first hole 31A and the second hole 31B, respectively.
Then, the stud bolt 22A of the airbag module 20 is passed through the first hole 31A and the second hole 31B of the support member 30 and the mounting hole of the plate frame 12, and is fixed using a fastener such as a nut. . As a result, the airbag module 20 is fixed to the side frame 13 in a state where the airbag module 20 faces the outer plate 31.

The upper wall portion 32 is a flange portion provided at the upper end portion of the outer plate 31. The upper wall portion 32 extends from the upper end of the outer plate 31 toward the seat outer side.
The upper wall portion 32 regulates the position of the upper portion of the airbag module 20. Thereby, the position shift of the airbag module 20 to the upper side can be prevented.

The rear wall portion 33 is a flange portion provided at the rear end portion of the outer plate 31. The rear wall 33 extends from the rear end of the outer plate 31 toward the seat outer side. The rear wall portion 33 and the upper wall portion 32 are connected at the corner on the upper rear side of the outer plate 31.
The rear wall portion 33 is disposed behind the airbag module 20 and regulates the position of the rear portion of the airbag module 20. Thereby, the support member 30 can prevent the position shift to the rear part of the airbag module 20.
Further, by providing the rear wall portion 33, the shape of the rear portion of the vehicle seat S can be defined.

The front extending portion 34 is a portion extending forward from the connecting portion between the outer side plate 31 and the inner side plate 35. The front extending portion 34 has a portion bent forward from the portion extending to the outside of the seat.
Here, as shown in FIG. 5, the front extension portion 34 has an L-shaped cross section, extends toward the fragile portion 41 provided on the seat pad 40, and is at least partially on the fragile portion 41. Is placed. Specifically, the front end portion of the front extension portion 34 is arranged in a state where it is inserted into the weak portion 41 of the seat pad 40.

As shown in FIGS. 5 and 6, the seat pad 40 includes a first pad portion 40A and a second pad portion 40B.
The first pad portion 40A is disposed on the outer side in the sheet width direction, and the second pad portion 40B is disposed on the front portion of the sheet. The first pad portion 40A and the second pad portion 40B are connected to each other at the front end of the seat, that is, at the fragile portion 41.

The fragile portion 41 is a portion that is formed in the vertical direction and is weaker than the first pad portion 40A and the second pad portion 40B.
For example, the fragile portion 41 is configured by forming one or more slits in the connection portion between the first pad portion 40A and the second pad portion 40B.
Further, the fragile portion 41 is not limited to the slit, and may be configured by forming a connection portion between the first pad portion 40A and the second pad portion 40B with a member having a weaker strength than the surroundings.
And the fracture | rupture part 51 of the skin 50 is provided ahead of the weak part 41. FIG. That is, the fragile portion 41 is provided close to the fracture portion 51 of the skin 50.

The skin 50 is a member that covers the seat pad 40, and is, for example, leather or cloth. The skin 50 has a side skin 50A that covers the first pad portion 40A and a front skin 50B that covers the second pad portion 40B.
Here, the side skin 50 </ b> A and the front skin 50 </ b> B are stitched together at the break portion 51. The breaking portion 51 is formed in the vertical direction and serves as an outlet when the airbag 21 of the airbag module 20 is inflated from the inside of the seat.

Then, when a certain impact or more is applied to the vehicle, the inflator 22 of the airbag module 20 is operated to inject gas into the airbag 21 to rapidly inflate the airbag 21. Thereby, the airbag 21 presses the support member 30 inside the seat.
At this time, as shown in FIG. 6, the outer plate 31 of the support member 30 is in contact with and supported by the side plate 12 </ b> A of the plate-like frame 12, so the position of the outer plate 31 is not substantially changed.

On the other hand, the front extending portion 34 of the support member 30 is pressed against the inner side of the seat by the airbag 21 and acts to spread the weak portion 41 of the seat pad 40.
Then, the front extending portion 34 spreads the fragile portion 41, so that the airbag 21 is deployed from the fragile portion 41 toward the rupture portion 51, and the fragile portion 41 and the rupture portion 51 are broken while being expanded. Swells outside the seat.
In this manner, the support member 30 can guide the deployment direction of the airbag 21 of the airbag module 20 by providing the front extending portion 34. Note that the above-described deployment direction is a direction from the airbag 21 before inflation toward the fracture portion 51.

  Next, the inner plate 35 of the support member 30 will be described. The inner plate 35 is a plate-like portion disposed on the inner side in the sheet width direction of the support member 30. Further, as shown in FIG. 6, the inner plate 35 has a step structure having steps in the front and rear, and has a shape in which a distance from the outer plate 31 is widened in the rear with respect to the front.

As shown in FIGS. 4 and 5, two fixed portions 36 are provided at the rear end of the inner plate 35.
The fixing part 36 is composed of a screw through hole and a thick part around the screw through hole. The screw through hole is a hole through which a fastener 37 such as a screw is inserted. Thus, the rigidity of the fixing part 36 is improved by providing the fixing part 36 with a thick part around the screw through hole.

And as FIG. 5 shows, the connection part of the pipe frame 11 and the plate-shaped flame | frame 12 is distribute | arranged between the inner side board 35 and the outer side board 31. As shown in FIG. In the pipe frame 11, for example, a screw mounting hole is provided at a position facing the fixing portion 36, and the fixing portion 36 and the pipe frame 11 are fastened by a fastener 37. In this way, the support member 30 is fixed to the connecting portion between the pipe frame 11 and the plate frame 12.
In addition, the fixing | fixed part 36 may be joined with respect to the pipe frame 11 not only by the fixing using a fastener but by welding.

As described above, the upper portion of the support member 30 is fixed to the pipe frame 11 by the inner plate 35 disposed inside the seat.
As shown in FIG. 4, the lower portion of the support member 30 is locked to the front end portion 12 </ b> B of the plate frame 12 by a locking portion 38 provided at the lower portion of the inner plate 35. The locking portion 38 is provided below the fixed portion 36.
Specifically, in the present embodiment, a plurality of J hook-shaped locking portions 38 are formed in the lower portion of the inner plate 35. In addition, the shape of the latching | locking part 38 is not restricted to the shape shown in figure, It is good also as one J hook extended up and down.
The locking portion 38 is locked to the front end portion 12B of the plate-like frame 12, but may be locked to the rear end portion 12C of the plate-like frame 12.
Further, the support member 30 may include a locking portion 38 that is locked to the front end portion 12B of the plate frame 12 and a locking portion 38 that is locked to the rear end portion 12C of the plate frame 12. Good.

  On the other hand, in the support member 30, the outer side plate 31 disposed on the outer side of the seat is in contact with the side plate 12A of the plate-like frame 12, but is not fastened, and is a free end.

Thus, by fixing the inside of the support member 30 and setting the outside as a free end, when a load from the outside is applied to the support member 30, the fixed portion 36 and the locking portion 38 are fixed ends. Thus, the movement and deformation of the outer plate 31 can be promoted, and the load can be released.
That is, the inner side of the support member 30 is a fixed end, and the outer side is a free end, thereby improving the shock absorption from the outside. On the other hand, with respect to the load from the inside of the seat, the passenger can be supported by the inside of the seat being a fixed end.

  Further, as described above, in the present embodiment, when the airbag 21 of the airbag module 20 is inflated, the forward extension is performed with the locking portion 38 locked to the front end portion 12B of the plate frame 12 as a fulcrum. The part 34 can spread the weak part 41 as an action point. Thereby, the deployment direction of the airbag 21 can be guided so that the airbag 21 bulges outside the seat while the fragile portion 41 and the fracture portion 51 are cleaved.

In the support member 30, one or more ribs 39 are provided between the inner plate 35 and the outer plate 31.
As shown in FIG. 6, the rib 39 extends in the front-rear direction of the seat and connects the inner plate 35 and the outer plate 31. A plurality of ribs 39 may be provided. In such a case, the ribs 39 may be arranged at substantially equal intervals from the vicinity of the upper end to the vicinity of the lower end between the inner plate 35 and the outer plate 31.
The length of the rib 39 in the front-rear direction of the seat is shorter than that of the inner plate 35 and the outer plate 31, and a space is formed between the inner plate 35 and the outer plate 31 at the rear of the seat with respect to the rib 39. Is done. And the connection part of the pipe frame 11 and the plate-shaped frame 12 will be arrange | positioned in this space.
As shown in FIG. 5, at least a part of the rib 39 and the plate frame 12 may be in contact with each other.

  Thus, by providing the rib 39, the rigidity of the inner side plate 35 and the outer side plate 31 can be increased, the occupant's holdability can be improved, and the impact absorption can be improved. The shape of the rib 39 is not limited to the shape shown in the figure, and may be, for example, a flat plate extending up and down.

[Other Embodiments]
The present invention is not limited to the above embodiment.
For example, in the support member 30, the upper wall portion 32 and the rear wall portion 33 may not be provided.

  In the above-described embodiment, the vehicle seat is described as an example of the vehicle seat. However, the present invention is also applicable to an airplane seat, a ship seat, and the like.

  In the above-described embodiment, the configuration in which the support member 30 and the airbag module 20 are attached to the left side of the vehicle seat S has been described. However, the support member 30 and the airbag are attached to both the right side and the left and right sides of the vehicle seat S. The module 20 may be attached.

[Effects produced by the vehicle seat S]
According to the vehicle seat S, the stability of fixing the support member 30 to the side frame 13 can be improved by locking the support member 30 to the end of the side frame 13.
Thereby, a passenger | crew and the airbag module 20 can be supported stably.

In the vehicle seat S, the locking portion 38 is locked to the front end portion 12B of the side frame 13 (plate frame 12).
By carrying out like this, the proof stress to the load applied to the front side of the supporting member 30 can be improved. Accordingly, the occupant can be stably supported at the front portion of the vehicle seat S.

In the vehicle seat S, when the force from the outside of the seat to the inside acts, the front extension portion 34 moves to the inside of the seat while being supported by the side frame 13 (plate frame 12).
Thereby, the front extension part 34 of the support member 30 can greatly expand the fragile part 41 so that the airbag 21 can be deployed toward the fracture part 51. That is, according to the support member 30, the deployment direction of the airbag 21 can be guided so that the airbag 21 bulges outward while the fragile portion 41 and the fracture portion 51 are cleaved.
As a result, the support member 30 can substitute for the blanket, and the number of parts can be reduced.

In the vehicle seat S, the support member 30 is attached to the side frame 13 in a state of facing the side plate 12 </ b> A of the side frame 13.
By doing so, the front extending portion 34 of the support member 30 moves inward in a state where the support member 30 is supported by the side frame 13 with respect to the force from the outside of the seat to the inside. Thereby, the front extension part 34 of the supporting member 30 can be made to act so that the weak part 41 may be greatly expanded.

In the vehicle seat S, the support member 30 has a rear wall portion 33 disposed behind the airbag module 20.
By doing so, the shape of the rear side of the sheet can be maintained. Further, the airbag module 20 can be protected from the load on the rear side.

In the vehicle seat S, the front extension 34 has an L-shaped cross section.
By doing so, the front extension 34 can be disposed along the airbag module 20. Thereby, the space in the sheet can be effectively used.

In the vehicle seat S, the fragile portion 41 is a portion where a slit is formed in the seat pad 40.
By doing so, the fragile portion 41 can be provided in the seat pad 40 with a simple configuration.

In the vehicle seat S, the support member 30 includes an outer plate 31 disposed on the outer side of the side frame 13 and an inner plate 35 disposed on the inner side of the side frame 13. A fixing portion 36 is provided.
By carrying out like this, the supporting member 30 can strengthen the yield strength to the load from the inside of a sheet | seat.

In the vehicle seat S, the inner plate 35 has a locking portion 38, and the fixing portion 36 is provided above the locking portion 38.
By doing so, the fixing of the support member 30 to the side frame 13 can be stabilized.

In the vehicle seat S, the side frame 13 includes a plate-like frame 12 having a flat side plate, and the front end portion 12B is bent inward of the seat.
By doing so, the fixing between the support member 30 and the front end portion 12B of the side frame 13 can be stabilized.

S Vehicle seat (vehicle seat)
S1 Seat back S2 Seat cushion S3 Headrest 10 Seat back frame (seat frame)
DESCRIPTION OF SYMBOLS 11 Pipe frame 11A Upper frame 11B Side part 12 Plate-like frame 12A Side plate 12B Front end part 12C Rear end part 13 Side frame 14 Cross member frame 15 Lower frame 16 Headrest holder 20 Air bag module 21 Air bag 22 Inflator 22A Stud bolt 30 Support member 31 outer plate 31A first hole 31B second hole 32 upper wall portion 33 rear wall portion 34 forward extension portion 35 inner plate 36 fixing portion 37 fastener 38 locking portion 39 rib 40 seat pad 40A first pad portion 40B second Pad part 41 Weak part 50 Skin 50A Side skin 50B Front skin 51 Broken part

Claims (9)

A side frame that forms the side of the seat frame;
A seat pad arranged outside the side frame;
An airbag module disposed between the seat pad and the side frame;
A support member for supporting the airbag module,
The support member is
A fixing portion fixed to the side frame;
A locking portion locked to an end of the side frame,
The vehicle seat according to claim 1, wherein the locking portion is provided below the fixed portion.   The vehicle seat according to claim 1, wherein the locking portion is locked to a front end portion of the side frame. An epidermis covering the seat pad,
The airbag module is
An airbag,
An inflator for injecting gas into the airbag,
The skin has a rupture portion that breaks when the airbag is deployed,
The seat pad has a fragile portion provided close to the rupture portion of the skin,
The support member is
Extending toward the fragile portion, and having a front extension portion at least partially disposed on the fragile portion,
The vehicle seat according to claim 1, wherein the support member is attached to the side frame in a state of facing a side plate of the side frame.   The vehicle seat according to claim 1, wherein the support member has a rear wall portion disposed behind the airbag module.   The vehicle seat according to claim 3, wherein the front extension portion has an L-shaped cross section.   The vehicle seat according to claim 3, wherein the break portion is a portion where a slit is formed in the seat pad. The support member is
An outer plate disposed outside the side frame;
An inner plate disposed inside the side frame,
The vehicle seat according to claim 2, wherein the inner plate has the fixing portion. The inner plate has the locking portion;
The vehicle seat according to claim 7, wherein the fixing portion is provided above the locking portion. The side frame has a plate-like frame having a flat side plate,
The vehicle seat according to claim 8, wherein the front end portion is bent inward of the seat.

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