JP3020048B2 - 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 side wall of a vehicle body by an airbag device provided in a seat back.

[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 outside a seatback side portion facing a vehicle body side wall side so as to inflate in a space perpendicular to the vehicle body side wall side or in a space between a seated person and the vehicle. Have been. 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 where the greatly inflated airbag body is further pressed against the occupant.

[0004]

However, in such a conventional technique, since the airbag module is attached to the outside of the side of the seatback, the width of the seatback protrudes largely on one side, and the appearance is impaired. In addition to the danger, the seat belt may be caught on the protruding portion when the seat belt is worn, and when the airbag module is stored inside the seat back, the outer diameter of the gas generator may be large. Therefore, there is a possibility that the sitting comfort may deteriorate.

[0005] According to the present invention, in the event of a side collision of a vehicle, the airbag body of the airbag device inflates, thereby suppressing the impact load received by the occupant and effectively absorbing the inertial force applied to the occupant. It is another object of the present invention to provide a vehicle seat that prevents a secondary collision of a seated person against a side wall of a vehicle body and that does not have a risk of deteriorating the appearance and comfort of the seat back.

[0006]

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 recess formed in a part of a side frame of a seat back frame. Then, in the vehicle seat having the airbag device fixed to the recess, the gas generator of the airbag device is inserted into the airbag body through the opening of the airbag body, and the gas generator is inserted into the airbag body. In the housed state, the cover member is fixed to the concave portion of the side frame, and a cover member is fixed to the side frame. The cover member has a mounting portion and a curved guide portion, and the opening side of the airbag body. Is sandwiched between a base end of the side frame rearward of the recess and a mounting portion of the cover member fixed to the rear base end of the side frame rearward. .

According to a second aspect of the present invention, there is provided a vehicle seat having an upper frame in which a seat back frame is formed of an inverted U-shaped pipe frame, and side frames connected to both lower ends of the upper frame. In a vehicle seat in which a concave portion is formed in a part of the one side frame and an airbag device is fixed in the concave portion, the gas generator of the airbag device is inserted into the airbag main body from an opening of the airbag main body. The gas generator is inserted and fixed to the recess of the side frame in a state where the gas generator is housed inside the airbag body, and a cover member is fixed to the side frame, and the cover member is a guide portion which is curved with the mounting portion. And
The end of the airbag body on the opening side is between a base end behind the recess of the side frame and a mounting portion of a resin cover member fixed to the base end behind the recess of the side frame. The mounting portion of the cover member and the end of the airbag body on the side of the opening are fixed to the side frame by a pressing member.

[0008]

According to the vehicle seat of the present invention, the gas generator of the airbag device is inserted into the airbag body through the opening of the airbag body, and the gas generator is connected to the airbag body. A cover member is fixed to the side frame while being housed therein, and a cover member is fixed to the side frame. The cover member has a mounting portion and a curved guide portion. Since the end of the seat back is sandwiched between the base end behind the recess of the side frame and the mounting portion of the cover member fixed to the base end behind the recess of the side frame, There is no danger that the width will protrude greatly on one side, and the appearance can be improved.Since the airbag device is not located inside the seat back, the sitting comfort is degraded due to the outer diameter of the gas generator. There is no fear that. Also, when the airbag body of the airbag device is inflated, the airbag body pushes open the guide portion of the cover member, breaks the sewn portion of the skin material of the seat back, etc. Swelling in response to the impact load received by the occupant from the airbag body, effectively absorbing the inertial force applied to the occupant, and preventing a secondary collision of the occupant against the side wall of the vehicle body. Can be.

[0009] According to the vehicle seat of the second aspect of the present invention, the upper frame composed of the inverted U-shaped pipe frame and the side frames connected to both lower ends of the upper frame. In a vehicle seat having a concave portion formed in a part of the one side frame and having an airbag device fixed to the concave portion, the gas generator of the airbag device has an airbag body through an opening of the airbag body. And the gas generator is fixed to the recess of the side frame in a state where the gas generator is housed inside the airbag body, a cover member is fixed to the side frame, and the cover member is formed to be curved with the mounting portion. A guide portion, and an end of the airbag body on the opening side is fixed to a base end behind the recess of the side frame and a base end behind the recess of the side frame. Since the mounting portion of the cover member and the end on the opening side of the airbag body are fixed to the side frame by the pressing member, the seat back is There is no danger that the width of one side will protrude greatly on one side, and the appearance can be improved. In addition, since the airbag device is not located inside the frame of the seat back, the seating comfort is improved by the outer diameter of the gas generator. There is no fear of the deterioration. Also, when the airbag body of the airbag device is inflated, the airbag body pushes open the guide portion of the cover member, breaks the sewn portion of the skin material of the seat back, etc. Swelling in response to the impact load received by the occupant from the airbag body, effectively absorbing the inertial force applied to the occupant, and preventing a secondary collision of the occupant against the side wall of the vehicle body. Can be.

[0010]

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 4 show one embodiment of a vehicle seat according to the present invention. The vehicle seat 10 includes a seat cushion 12 and a seat back 13.
It can be applied to the driver's seat, the passenger seat or the rear seat provided with.

As shown in FIG. 4, a vehicle seat 10 has a seat cushion 12 mounted on the vehicle body floor via a front-rear sliding mechanism 14 so as to be movable back and forth, and a reclining mechanism 15 at a rear end of the seat cushion 12. And a seat back 13 supported so as to be tiltable back and forth. The headrest 1 is located above the seat back 13.
6 are provided. The seat back 13 is a skin material 21,
A pad material 22 and a seat back frame 23 are provided.

As shown in FIGS. 1 to 3, an upper frame 24 in which a seat back frame 23 is formed of an inverted U-shaped pipe frame, and a side panel frame 25 as a side frame connected to both lower ends of the upper frame 24. ,
26, a recess 28 is formed in a part of the one side panel frame 25 so as to extend in the vertical direction.

The recess 28 is provided in the side panel frame 25.
Is formed in a semicircular cross section in a convex shape inward at a substantially central portion thereof, but is not limited to the illustrated one. An S-shaped seat spring 31 and a lumbar support mechanism 33 are attached between the side panel frames 25 and 26. A headrest stay holder bracket 35 is welded to the upper frame 24.

The seat back frame 23 is not limited to the upper frame 24 made of an inverted U-shaped pipe frame. For example, one panel is bent in a U-shaped cross section or the panel is bent in a U-shaped cross section. It may be bent in a letter shape and formed into a circular cross section by press working or curling. Further, the upper frame 24 and the side panel frames 25 and 26 may be integrally formed from one panel. Further, a bracket may be fixed to the upper frame 24 to form the side panel frame 25.

The recess 28 of the side panel frame 25
Are formed on the mounting portion of the side collision airbag device 51. The side collision airbag device 51 includes a cylindrical gas generator 5.
3 and a plurality of bolts 5 outside the gas generator 53.
3a is welded. The gas generator 53 may be fixed by a holder bracket, and a plurality of bolts 53a may be welded to the holder bracket.

The gas generator 53 includes an airbag body 55.
Is inserted into the airbag body 55 through the opening 55a of
A plurality of bolts 53a outside the gas generator 53 project outward from bolt holes 55b formed in the airbag body 55. The plurality of bolts 53 a are inserted into bolt holes 28 a formed in the recesses 28 of the side panel frame 25, respectively, and are fixed to the nuts 54.

When the gas generator 53 operates, the gas generator 5
The airbag body 55 is fixed so that the gas ejected from 3 flows in and swells. As is clear from FIGS. 2 and 3, the end of the airbag body 55 on the side of the opening 55 a is located at the base end behind the recess 28 of the side panel frame 25 and at the rear of the recess 28 of the side panel frame 25. It is sandwiched between a mounting portion 65 of a resin cover member 57 fixed to the base end side. The cover member 57
Is not limited to resin and may be metal.

The cover member 57 and the end of the airbag body 55 on the opening 55a side are fixed to the side panel frame 25 by a pressing member 61. The side panel frame 25 has a plurality of holes 25 for rivets 63.
is formed, a plurality of holes 57a for the rivets 63 are formed in the cover member 57, and a plurality of holes 55c for the rivets 63 are formed at the end of the airbag body 55 on the opening 55a side. Are formed with a plurality of holes 61a for the rivets 63.

As shown in FIG. 2, the cover member 57 has a mounting portion 65 in which a plurality of holes 57a for the rivets 63 are formed.
And a curved guide portion 67, and the guide portion 6
The cover 7 is covered with the folded state. The distal end 67a of the guide portion 67 extends to a position close to the sewing portion 21a of the skin material 21 of the seat back 13.

Next, referring to FIG.
Will be described. First, when the gas generator 53 operates, the airbag body 55 presses the curved guide portion 67 of the cover member 57 in the initial inflated state of the airbag body 55, and the guide portion 67 Press the side part.

As the inflation of the airbag body 55 progresses,
The airbag main body 55 breaks the sewing thread of the sewing part 21a of the main side cloth and the horizontal gusset cloth of the skin material 21, and the airbag main body 55 is guided by the guide part 67 to be in a predetermined bulging state. In the swelled state of the airbag body 55, the front part of the side part of the pad material 22 is pressed by the guide part 67,
In addition, since it is in a covered state, there is no possibility that the front portion of the side portion of the pad material 22 is torn off and scattered.

[0022]

As described above, the structure of one embodiment of the vehicle seat according to the present invention is described. According to the vehicle seat according to the first aspect of the present invention, the gas generator of the airbag device is an airbag. Inserted into the airbag body through the opening of the body,
The gas generator is fixed to a recess of the side frame while being housed inside the airbag body, a cover member is fixed to the side frame, and the cover member has an attachment portion and a curved guide portion. An end of the airbag body on the opening side is sandwiched between a base end behind the recess of the side frame and a mounting portion of a cover member fixed to the base end behind the recess of the side frame. Because there is no possibility that the width of the seat back protrudes greatly only on one side,
The appearance can be improved, and since the airbag device is not located inside the seat back, there is no fear that the sitting comfort will be degraded due to the outer diameter of the gas generator. Also, when the airbag body of the airbag device is inflated, the airbag body pushes open the guide portion of the cover member, breaks the sewn portion of the skin material of the seat back, etc. Swelling in response to the impact load received by the occupant from the airbag body, effectively absorbing the inertial force applied to the occupant, and preventing a secondary collision of the occupant against the side wall of the vehicle body. Can be.

According to the vehicle seat according to the second aspect of the present invention, the upper frame formed of the inverted U-shaped pipe frame and the side frames connected to both lower ends of the upper frame are provided. In a vehicle seat having a concave portion formed in a part of the one side frame and having an airbag device fixed to the concave portion, the gas generator of the airbag device has an airbag body through an opening of the airbag body. And the gas generator is fixed to the recess of the side frame in a state where the gas generator is housed inside the airbag body, a cover member is fixed to the side frame, and the cover member is formed to be curved with the mounting portion. A guide portion, and an end of the airbag body on the opening side is fixed to a base end behind the recess of the side frame and a base end behind the recess of the side frame. Since the mounting portion of the cover member and the end on the opening side of the airbag body are fixed to the side frame by the pressing member, the seat back is There is no danger that the width of one side will protrude greatly on one side, and the appearance can be improved. In addition, since the airbag device is not located inside the frame of the seat back, the outer diameter of the gas generator provides a comfortable seat. There is no fear of the deterioration. Also, when the airbag body of the airbag device is inflated, the airbag body pushes open the guide portion of the cover member, breaks the sewn portion of the skin material of the seat back, etc. Swelling in response to the impact load received by the occupant from the airbag body, effectively absorbing the inertial force applied to the occupant, and preventing a secondary collision of the occupant against the side wall of the vehicle body. Can be.

According to the present invention, in the event of a side collision of a vehicle,
The airbag body of the airbag device inflates, reduces the impact load received by the occupant, can effectively absorb the inertial force applied to the occupant, and prevents a secondary collision of the occupant against the side wall of the vehicle body, Further, it is possible to obtain a vehicle seat that does not have a risk of deteriorating the appearance and comfort of the seat back.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing a state before an airbag body of the vehicle airbag device according to the present invention is inflated.

FIG. 3 is a sectional view showing a state in which an airbag body of the airbag device for a vehicle seat according to the present invention is inflated.

FIG. 4 is a side view showing a state in which an airbag body of the airbag device for a vehicle seat according to the present invention is inflated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Seat cushion 13 Seat back 21 Skin material 22 Pad material 23 Seat back frame 24 Upper frame 25 Side panel frame 26 Side panel frame 28 Depression 28a Bolt hole 51 Airbag device 53 Gas generator 53a Bolt 54 Nut 55 Air Bag body 55a Opening 55b Bolt hole 55c hole 57 Cover member 57a hole 61 Pressing member 63 Rivet 65 Mounting part 67 Guide part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 21/16-21/32 B60N 2/42 A47C 3/00 A47C 7/00

Claims (2)

(57) [Claims] 1. A vehicle seat in which a concave portion is formed in a part of a side frame of a seat back frame and an airbag device is fixed to the concave portion, wherein a gas generator of the airbag device is connected to an opening of an airbag body. The gas generator is inserted into the airbag body, and is fixed to the recess of the side frame in a state where the gas generator is housed inside the airbag body, and a cover member is fixed to the side frame, and the cover member is bent with the mounting portion. A cover member having a formed guide portion, wherein an end of the airbag body on the opening side is fixed to a base end behind the recess of the side frame and a base end behind the recess of the side frame. A vehicle seat, which is sandwiched between a mounting portion and a vehicle seat. 2. The seat back frame has an upper frame formed of an inverted U-shaped pipe frame, and side frames connected to both lower ends of the upper frame, and a recess is formed in a part of the one side frame. In the vehicle seat formed and having the airbag device fixed to the recess, the gas generator of the airbag device is inserted into the airbag body through an opening of the airbag body, and the gas generator is mounted inside the airbag body. The cover member is fixed to the recess of the side frame in a state where the cover member is accommodated, and the cover member has a mounting portion and a curved guide portion, and the opening portion of the airbag body. Side end is sandwiched between a base end behind the recess of the side frame and a mounting portion of a resin cover member fixed to the base end behind the recess of the side frame. A seat for a vehicle, wherein a mounting portion of the cover member and an end of the airbag body on the opening side are fixed to the side frame by a pressing member.