JP4292466B2 - Car seat with side airbag module - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat equipped with a side airbag module, which includes an airbag module for inflating and deploying an airbag with a gas pressure of an inflator on a side surface portion of a seat cushion.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a vehicle seat equipped with a side airbag module including an airbag module that inflates and deploys an airbag with a gas pressure of an inflator on a side surface portion of a seat cushion is known (Patent Document 1).
[0003]
In the automobile seat, the airbag storage case is assembled to the side surface of the seat cushion, and a breaking portion for deploying the airbag is formed by the seam line between the seat piece and the bank piece that sew the seat cover in a three-dimensional shape. And the airbag module is equipped so that this fracture | rupture part may be press-incised with the lid of the storage case opened | released with inflation of an airbag.
[0004]
In general, a seat skin of an automobile seat is sewn into a three-dimensional shape by double or multiple sewing of terminals that are folded back inside each piece so that a sewing thread does not fray under the load of a seated person. If a breakage portion for airbag deployment is formed from a seam line that sews the seat skin into a three-dimensional shape, it is not possible to meet the demand for the airbag to be inflated and deployed at a low pressure.
[0005]
To meet this demand, the sewing thread that sews the seat skin into a three-dimensional shape and the sewing thread that forms the breaking portion for airbag deployment are replaced with large and small counts, and the seat skin is made into a three-dimensional shape that can withstand the load of the seated person. In addition to sewing, it has been proposed to sew a breaking portion for airbag deployment so as to allow incision with a low inflation pressure of the airbag (Patent Document 2).
[0006]
However, since the sewing thread count is changed, it takes time and labor to sew the entire seat skin.
[0007]
[Patent Document 1]
JP-A-4-356246 [Patent Document 2]
Japanese Patent Laid-Open No. 10-129398
[Problems to be solved by the invention]
In the present invention, the seat skin can be sewn in a three-dimensional shape so that it can withstand the load of the occupant, as well as the rupture portion for deploying the airbag is sewn so that it can be incised with the low inflation pressure of the airbag. An object of the present invention is to provide an automobile seat equipped with a side airbag module provided on a side portion of a seat cushion.
[0009]
[Means for Solving the Problems]
In the vehicle seat equipped with the side airbag module according to claim 1 of the present invention, the airbag module for inflating and deploying the airbag with the gas pressure of the inflator is provided on the side surface portion of the seat cushion.
A cover member is provided on the side surface of the seat cushion, and the upper end of the cover member is sewn to the side piece of the seat cover by a single stitch line that does not overlap the stitch line that sews the seat cover from a plurality of pieces into a three-dimensional shape. Forming a breaking portion for inflating and deploying the airbag, and providing the lower end of the cover member together with the lower end portion of the side piece between the slide rail disposed on the lower side of the cushion frame and the exterior cover Hang on the support wire of
The airbag module is accommodated between the side piece of the seat cover inside the cover member, and a seam line serving as the fracture portion is exposed to enclose the airbag and inflator of the cover member. A portion to be accommodated and arranged inside the exterior cover, and the airbag is assembled so as to be deployable to the side of the seat from between a seam line serving as the breaking portion and an upper end portion of the exterior cover. Yes.
[0010]
In the vehicle seat equipped with the side airbag module according to claim 2 of the present invention, the upper terminal folded back to the inside of the cover member is sewn to the side piece of the seat skin by one seam line for deploying the airbag. It is comprised by forming a fracture | rupture part.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Referring to the accompanying drawings, the illustrated embodiment is configured as an assistant seat for a right-hand drive vehicle. The seat cushion 1 is configured by being normally encased with a seat skin 2 sewn from a seat piece 2a, a bank piece 2b, a side piece 2c, and a front piece 2d, and equipped with an airbag module 3 on the left side. ing.
[0012]
As shown in FIG. 1, the airbag module 3 includes an airbag 3a and a gas generating inflator 3b, and is provided because an impact sensor (not shown) is electrically connected to the inflator 3b. The airbag 2a is held by an inflator 3b that is folded so as to be unraveled and inserted into the base side. The inflator 3b is attached in the front-rear direction of the seat cushion 1 because the front end side is held by a bracket 1b that is fixed to the cushion frame 1a and the rear end side is fixed to the spring cover 1c of the reclining device.
[0013]
The airbag module 3 is accommodated and disposed between the airbag 3a excluding the front and rear ends of the inflator 3b and the side piece 2c of the seat skin 2 inside the cover member 4 that encloses the inflator 3b. The cover member 4 is cut into a substantially quadrangular shape from the same sheet material as that of the sheet skin 1 and is provided separately from the plurality of pieces 2 a to 2 d forming the sheet skin 2.
[0014]
The cover member 4 sews the upper terminal 4a to the side piece 2c of the seat skin 2 by a single stitch line 5 (see the broken line) that does not overlap the stitch line 2e (see the solid line) for sewing the seat skin 2 into a three-dimensional shape. At the same time, the lower terminal 4b is hooked on the lower side of the cushion frame 1a and is stretched on the side surface of the seat cushion 1. With this configuration, one seam line 5 is formed as a broken portion of the cover member 4 that inflates and deploys the airbag 2a.
[0015]
The seam line 5 of the upper terminal 4a is arranged on the side surface portion of the seat cushion 1 where the cover member 4 is not greatly affected by the load of the occupant. Therefore, the stitch line 5 is the same as the sewing thread for sewing the seat skin 2 into a three-dimensional shape. Regardless, it can be formed by a large count sewing thread. The lower terminal 4b is provided with a plurality of latching hooks 6 as shown in FIG. 2, and on the axis of the support wire 1d common to the terminal of the seat skin 2 being fastened by the latching hooks 7 by the latching hooks 6. It can be hung on and fixed.
[0016]
1 and 2, 8 is a slide rail, 9 is a cushion pad, 10 is a trim cord for hanging and fixing the seat skin 1, 11 is a hanging wire inserted into the cushion pad 9, and 12 is a trim cord 10. Is a C-ring that is entangled with the suspending wire 11, and 13 is an exterior cover. The above-described support wire 1d is provided between the slide rail 8 and the exterior cover 13 that are disposed on the lower side of a cushion frame (not shown).
[0017]
As shown in FIG. 3, the upper end 4a of the cover member 4 is folded back to a predetermined width, and is sewn to the side piece 2c (see FIG. 1) of the seat skin 2 at one seam line 5. It is formed as a broken part for use. The upper end 4a of the cover member 4 can be sewn to the side piece 2c of the sheet skin 2 while extending without being folded back.
[0018]
However, when the upper end 4a of the cover member 4 is folded back, the end edge of the cover member 3 and the sewing thread of the seam line 5 are not exposed to the outside, so that the appearance can be kept good. Further, when the upper end 4a of the cover member 4 is stretched and the side piece 2c of the seat skin 2 is sewn, the inflation pressure of the airbag 3a acts to push open the seam line 5, whereas the cover member 4 When the upper terminal 4a is sewed in the folded state, the inflation pressure of the airbag 3a acts to turn and pull the seam line 5, so that the sewing thread at the seam line 5 can be easily cut out.
[0019]
As shown in FIG. 4, the automotive seat including the airbag module configured as described above includes a resin exterior cover 13, and exposes the seam line 5 serving as a fractured portion, and the airbag 2 a of the cover member 3 . A portion that encloses the inflator 2 b is accommodated and disposed inside the exterior cover 13. In the figure, reference numeral 14 denotes an operation lever of a reclining device provided to protrude outside the exterior cover 13.
[0020]
In the airbag module 3, when the impact sensor is activated, the airbag 3 a is inflated by the gas pressure generated from the inflator 3 b, and the inflation pressure of the airbag 3 a faces the side piece 2 c of the seat skin 2 and the inner surface of the cover member 4. The upper end 4a of the cover member 4 is concentrated on the seam line 5 that is sewn to the side piece 2c of the seat skin 2. Accordingly, the sewing thread of the seam line 5 is surely incised by the inflation pressure of the airbag 3a, and the airbag 3a is guided in the lateral direction by the side piece 2c of the seat cover 2, so that the air as shown in FIG. The bag 3 a can be inflated and deployed smoothly upward from the upper end 4 a of the cover member 4.
[0021]
The seam line 5 is formed of a single line that does not overlap with the seam line 2e for sewing the sheet skin 2 into a three-dimensional shape, and is large regardless of whether it is the same as the sewing thread for sewing the sheet skin 2 into a three-dimensional shape. Since it can also be formed with a count sewing thread, the incision can be made quickly even if the inflation pressure of the airbag 3a is set low.
[0022]
【The invention's effect】
As described above, according to the vehicle seat equipped with the side airbag module according to claim 1 of the present invention, the inflation pressure of the airbag acts so as to oppose the side piece of the seat skin and the inner surface of the cover member. Since the upper end of the member is concentrated on the seam line that is sewn to the side piece of the seat skin, the seam line that becomes the rupture part even if the rupture part for deploying the airbag can be incised with the low inflation pressure of the airbag Since the sewing thread is securely incised by the inflation pressure of the airbag and the airbag is guided by the side piece of the seat skin and the exterior cover, the airbag can be inflated and deployed smoothly above the upper end of the cover member. .
[0023]
According to the vehicle seat equipped with the side airbag module according to claim 2 of the present invention, the airbag is deployed by sewing the upper end folded back to the inside of the cover member with the side piece of the seat skin by one seam line. Since the end of the cover member and the sewing thread of the seam line are not exposed to the outside, the appearance of the cover member is not exposed to the outside, and the inflation pressure of the airbag acts to open the seam line. This makes it easier to cut out the sewing thread at the seam line.
[Brief description of the drawings]
FIG. 1 is a perspective view mainly showing a side airbag module installed in an automobile seat according to the present invention.
FIG. 2 is a cross-sectional view showing the automobile seat of FIG. 1 from the front.
3 is an explanatory view showing a sewing structure of a cover member provided in the automobile seat of FIG. 1. FIG.
4 is a perspective view showing the appearance of the automobile seat of FIG. 1; FIG.
FIG. 5 is an explanatory diagram showing the automobile seat of FIG. 1 in an inflated and deployed state of an airbag.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Seat skin 2a-2d Seat skin formation piece 2c Seat skin side piece 2e Seat skin stitch line 3 Air bag module 3a Air bag 3b Inflator 4 Cover member 4a Upper end 4b of cover member 5 Seam line of cover member (broken part)

Claims (2)

In an automobile seat comprising an airbag module on the side surface portion of a seat cushion for inflating and deploying an airbag with the gas pressure of an inflator
A cover member is provided on the side surface of the seat cushion, and the upper end of the cover member is sewn to the side piece of the seat cover by a single stitch line that does not overlap the stitch line that sews the seat cover from a plurality of pieces into a three-dimensional shape. Forming a breaking portion for inflating and deploying the airbag, and providing the lower end of the cover member together with the lower end portion of the side piece between the slide rail disposed on the lower side of the cushion frame and the exterior cover Hang on the support wire of
The airbag module is accommodated between the side piece of the seat cover inside the cover member, and a seam line serving as the fracture portion is exposed to enclose the airbag and inflator of the cover member. A portion to be accommodated and disposed inside the exterior cover, and the airbag is assembled so as to be deployable to the side of the seat from between a seam line serving as the fracture portion and an upper end portion of the exterior cover. Car seat with side airbag module. 2. The side airbag module according to claim 1, wherein an upper terminal folded back to the inside of the cover member is sewed with a side piece of the seat cover to form a breaking portion for airbag deployment. Equipped car seat.

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