JP3777522B2 - Airbag module built-in seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of an airbag module built-in seat in which an airbag module of an airbag device is built in one side portion of a seat back.
[0002]
[Prior art]
As a seat with a built-in airbag module, there has already been proposed a seat in which an airbag module of an airbag device is mounted in one side portion of a seat back and the side surface of the seat back is kept flat. Further, there is also known a technique in which a sewing line between a side skin of a seat skin and a bank skin is formed as a rupture portion having a predetermined length, and an airbag is inflated and deployed from the rupture portion. In the airbag module built-in seat, even if the airbag module is provided inside, the appearance of the seat back can be maintained as usual.
[0003]
In the airbag module built-in seat, it is necessary to configure so that the rupture portion of the seat skin can be surely expanded as the airbag is inflated.
[0004]
[Problems to be solved by the invention]
It is an object of the present invention to provide an airbag module built-in seat that is configured so that the breakage portion of the seat skin can be reliably expanded as the airbag is inflated.
[0005]
[Means for Solving the Problems]
In the airbag module built-in seat according to the present invention, the airbag module is provided in one side portion of the seat back, and the sewing line between the side surface skin of the seat skin and the bank skin is formed as a fracture portion having a predetermined length. What to do
In addition to sewing the front edge of the front skin that has been sewn into a predetermined three-dimensional shape from the bank skin and the seat skin, the ball edge is sewn to the terminal around the three sides of the skin with small upper and lower sewing threads. The side skin is sewn between the terminals around the three sides of the skin part together with the bead from the upper and lower sewing threads containing at least one yarn of the count, and further, at least the airbag module Provide a broken part that is double-sewn between the skin part and the terminal with a small upper and lower sewing thread on the upper and lower sides of the side skin that is continuous from the housing location,
It is constituted by suspending and fixing the terminal sewn portion of the bank skin and the seat surface skin and the terminal of the side surface skin to the seat back frame side with a suspending member made of metal wire.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the accompanying drawings, the illustrated embodiment is shown as mounting an airbag module E in the left side of a seat back B in an assistant seat of a right-hand drive vehicle. The seat back B includes a seat back frame 1 as shown in FIG. 1, a cushion pad 2 is assembled and mounted on the seat back frame 1 as a base, and the seat skin 3 is covered with the cushion pad 2 to form a back board. 4 is assembled and fixed to the rear side.
[0007]
As shown in FIG. 2, the seat back B is assembled by using a seat back frame 1 that is formed by bending an axis from a metal round pipe into a substantially quadrilateral shape. Further, side frames 11 and 12 for supporting the bank pad portion 21 from the inside near the side pad portion 20 of the cushion pad 2 are attached and fixed to the seat back frame 1 on the axis of each of the vertical portions 10a and 10b. It is equipped with.
[0008]
One of the side frames 11 and 12 is a side plate formed of a strip-like plate member, and the other 12 is a wire frame in which the wire member is formed by bending an axis so as to correspond to the raised shape of the bank pad portion 21. It becomes. In addition, a plurality of zigzag springs 14 a, 14 b... Are provided between the shafts of the longitudinal axis portions 10 a, 10 b by being fastened to the seat back frame 1 with a stopper 13 such as a retainer.
[0009]
In the seat back frame 1, the side plate 11 has a stepped portion surface for accommodating the airbag module E by lowering the plate surface inward from a flange portion 11 a fixed to the longitudinal axis portion 10 a of the seat back frame 1. The thing provided with 11b is equipped. The step surface 11b is formed with a space or an area in which the airbag module E can be accommodated, and the side plate 11 has a stepped edge 11c positioned on the front side and a flange on the vertical portion 10a of the seat back frame 1. It is provided on one side of the seat back frame 1 by being fixedly attached at the portion 11a.
[0010]
The side plate 11 is equipped with an airbag module E attached to the stepped surface 11b. That the air bag module E is to be equipped with a module body e ₁ and the air bag e ₂ containing gas generating unit, it accommodates placing the entire inside of the stepped portion surface 11b by positioning the air bag e ₂ outwardly It is assembled by.
[0011]
The cushion pad 2 is assembled to the entire seat back frame 1 including the side plate 11. The cushion pad 2 is integrally foam-molded from the side pad portion 20, the bank pad portion 21 and the seat pad portion 23, and cuts out the thickness of the side pad portion 20 as shown in FIG. A structure in which an opening 22 substantially corresponding to the outer shape of E is provided in the surface of the side pad portion 20 is assembled.
[0012]
Its cushion pad 2, by positioning the air bag e ₂ side in the mouth of the opening 22, is assembled to the air bag module E is substantially flush with the outer surface of the side pad portion 20 in the airbag e ₂ side ing.
[0013]
The cushion pad 2 is encapsulated with a seat skin 3 so that the entirety including the airbag module E cannot be seen from the outside. For the sheet skin 3, a wading cover in which a skin material 3a, a wadding material 3b, and a backing material 3c are laminated together in one body can be used. The seat skin 3 is made up of a plurality of skins 30, 31, 32 (in the shape of a plane that can encapsulate each part of the side pad portion 20, the bank pad portion 21 and the seat pad portion 23 of the cushion pad 2). Hereinafter, the cover material is sewn into a predetermined three-dimensional shape by sewing between the terminals.
[0014]
Thus, when the seat back B is assembled by incorporating the airbag module E, the airbag module E is accommodated and installed in the stepped surface 11b of the side plate 11, so that the seat back B is the side surface of the seat skin 3. The cover member 30 can be assembled with the side surface kept flat without swelling.
[0015]
Therefore airbag module E is being assembled so that by positioning the air bag e ₂ side in the mouth of the opening 22 substantially flush with the outer surface of the side pad portion 20 in the airbag e ₂ side, the airbag The cushion pad 2 does not get in the way when the e ₂ is inflated and deployed, and the seat skin 3 can be directly pressed by the airbag e ₂ , so that the later-described rupture portion is reliably expanded as the airbag e ₂ is inflated. In addition, the side surface of the seat back B can be kept flat and assembled.
[0016]
In addition, since the side plate 11 is provided with a stepped surface 11b as an installation part of the airbag module E, not only can the side plate 11 be formed so as to increase the rigidity while maintaining the rigidity of the side plate 11, but only the side plate 11 can be formed. Thus, the airbag module E can be assembled and supported stably.
[0017]
In the seat back B, as shown in FIG. 3, a side cover member 30 serving as a side gusset in which the break portion 5 having a predetermined length L ₁ accompanying the inflation of the airbag e ₂ covers the side pad portion 20 of the cushion pad 2 is provided. It is provided in the sewing line with the bank cover material 31 covering the bank pad portion 21. The broken portion 5 is a side cover for the front skin portions 31 and 32 sewn in a predetermined three-dimensional shape from the bank cover material 31 and the seat surface cover material 32 covering the seat pad portion 22 of the cushion pad 2. It is formed by selecting the thickness of the thread for sewing the material 30 around the three sides of the skin portions 31 and 32.
[0018]
Specifically, as shown in FIG. 4, the side cover material 30 is sewn between the terminals around the three sides of the skin portions 31 and 32 from the upper and lower sewing threads 50 including a thin thread having a large count on at least one side. As the sewing thread 50, a thick thread of about 8 counts and a thin thread of about 20 counts may be selected as upper and lower sewing threads.
[0019]
In addition, except for the accommodation location of the air bag module E corresponding to the predetermined length L ₁ described above, at least the upper and lower side of the side cover member 30 from the small and below the sewing thread 51a of count L _2, L ₃ the front of the skin portion Double stitching between 31, 32 and the terminal. As the sewing thread 51a, a thick and strong thread of about 5 or 8 that is usually used may be used for the upper and lower sewing threads.
[0020]
According to the sewing, a sewing portion of only the upper and lower sewing threads 50 including a thin thread with a large count is pressed strongly on the seat cover 3 by the expansion of the airbag e ₂ to cause thread breakage, thereby causing a predetermined length L ₁ . It can be formed as a fracture portion 5.
[0021]
It should be noted that the sewing portion with a small count thread may be further double-sewn with the thick and strong sewing threads 51a and 51b having different counts of about 5 or 8 described above. Further, depending on either one of the small count sewing threads 51a and 51b, all of the remaining portions of the side cover member 30 and the three sides of the skin portions 31 and 32 may be sewn, except for the accommodation portion of the airbag module E. it can.
[0022]
The sheet skin 3 is provided with a bead 6 because it is sewn together at the sewing location of the side cover member 30 and the bank cover member 31 as shown in FIG. The ball edge 6 is temporarily sewn with the three upper ends of the skin portions 31 and 32 on the front surface and the upper and lower thick and strong sewing threads 54 having a count of about No. 5, and further includes a sewing thread 50 including the above-described thin threads with a large count. The side cover member 30 is sewn between the terminals around the three sides of the skin portions 31 and 32.
[0023]
When the bead 6 is sewn in this manner, the bead 6 is strongly sewn on the front skin portions 31 and 32 side, so that the bead 6 becomes the skin portion as the airbag e ₂ expands. The stepped portion 5 expands between the side cover 30 while being attached to the terminal side of 31 and 32. Therefore, the side cover member 30 can be greatly expanded without being restricted by the edge 6. Further, the front skin portions 31 and 32 can be opposed by the rigidity of the rim 6 as the airbag e ₂ is inflated, and can be prevented from being shredded in a complicated manner even when formed using a normal cover material. it can.
[0024]
In order to suspend and fix the seat skin 3, as shown in FIG. 1, the terminal of the side cover member 30 that covers the side pad portion 20 of the cushion pad 2 and the bank that covers the bank pad portion 21 of the cushion pad 2. It is applied that the terminal sewing part of the seat surface cover material 22 covering the cover material 31 and the seat surface pad portion 22 is suspended and fixed to the seat back frame 1 by the suspension members 7a and 7b made of metal wire. Yes.
[0025]
According to the metal wire made of hanging narrowing member 7a, 7b, can be firmly Tsukomi fastened to strongly pull holding the side cover member 30 and the seat surface covering material 31 so as to counteract the inflation of the air bag e _2. Therefore, it is possible to reliably break open with a broken part 5 of the seat skin 3 to inflate the air bag e _2.
[0026]
Among them, as shown in FIG. 6, the side cover member 30 is suspended by sewing the end of the side cover member 30 into a bag shape, and forming a plurality of notches 30b at regular intervals along the longitudinal direction of the tip of the bag portion 30a. In addition, as the suspension member 7a, it is possible to use a member in which a plurality of retaining rings 70b corresponding to the notches 30b of the side cover member 30 are provided by bending the axis of the metal wire 70a into a U-shape. it can. In the configuration, the bag portion 30a may be sewn with a thick and strong sewing thread 52 of about No. 5, which is smaller in count than the other portions.
[0027]
The suspending member 7a is configured such that each latch ring 70b of the metal wire 70a protrudes outward from the cutout portion 30b of the bag portion 30a and is inserted entirely into the bag portion 30a to thereby form the bag portion of the side cover member 30. Assemble to 30a. In this suspending member 7a, a U-shaped retaining ring 70b is engaged with a protruding piece 13b of a zigzag spring stopper 13a fixedly attached to a longitudinal axis portion 10a (only one side is shown) of the seat back frame 1. The end of the side cover member 30 can be suspended and fixed to the seat back frame 1.
[0028]
As shown in FIG. 7, the hanging bag 71a is sewed together at the terminal sewing locations of the bank cover material 31 and the seating surface cover material 32, and the linear listing wire 71b is inserted into the hanging bag 71a. Prepare. Further, as the suspending member 7b, it is possible to use a wisdom ring-shaped latching ring 72a, 72b formed by bending at both ends of the metal wire 72c.
[0029]
In the suspension member 7b, the latch ring 72a on one end side is latched on the listing wire 71b of the suspension bag 71a, and the latch ring 72b on the other end side is coupled to the seat back frame via the suspension hole 24 of the cushion pad 2. 1 is hung on one of the zigzag springs 14a, 14b..., And the terminal sewn portions of the bank cover material 31 and the seat surface cover material 32 can be suspended and fixed to the seat back frame 1. Even in this suspending structure, the suspending bag 71a may be sewn with a thick and strong sewing thread 53 of about No. 5 which is smaller in the upper and lower parts than the other parts.
[0030]
In the seat skin 3, the side cover member 30 covering at least the side pad portion 20 of the cushion pad 2 including the airbag module E may be formed of a backing material 3c having a tensile strength such as tricot. At the same time, the bank cover material 31 may be formed of a similar backing material 3c having a tensile strength such as tricot.
[0031]
According to its cover member, a metal wire made of hanging narrowing member 7a, with 7b, because it opposes the expansion of the air bag e _2, can be reliably breaking open the rupture portion 5 at the inflation of the airbag e ₂ moreover complicated cover material It can also be prevented from being shattered and scattered.
[0032]
【The invention's effect】
As described above, according to the seat with a built-in airbag module according to the present invention, as the airbag is inflated, the rim is left on the terminal side of the front skin portion and the stepped portion is between the side skin. The side skin can be expanded greatly without being restricted by the bead. Further, the front skin portion can be countered by the rigidity of the bead as the airbag is inflated, and even if formed using a normal cover material, it can be prevented from being complicatedly broken. The sheet skin is firmly pulled and held firmly by a metal wire suspension member so that the side skin and bank skin can resist the inflation of the airbag, so that the fractured portion is accompanied by the inflation of the airbag. It is possible to reliably open the opening.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing an airbag module built-in sheet according to the present invention.
FIG. 2 is a perspective view showing a seat back frame of the airbag module built-in seat.
FIG. 3 is an overall perspective view showing the airbag module built-in seat.
FIG. 4 is a partial perspective view showing a seat skin of the airbag module built-in sheet from the inner surface side.
FIG. 5 is an explanatory diagram showing a sewn structure with a bead on the sheet skin.
FIG. 6 is an explanatory view showing the suspension structure of the seat skin on the terminal side of the side skin.
FIG. 7 is an explanatory view showing a structure in which the seat skin is suspended by a bank surface skin, a seat surface skin, and sewing locations.
[Explanation of symbols]
B Seat back E Airbag module e ₂ Air bag 1 Seat back frame 2 Cushion pad 20 Side pad part 21 Bank pad part 22 Opening 23 Seat pad part 3 Seat skin 30 Side skin 31 Bank skin 32 Seat surface skin 5 Breaking part 50 Sewing thread including large count thread 51a, 51b Small count sewing thread 54 Small count sewing thread 6 Ball edge 7a, 7b Suspension member

Claims (1)

In the airbag module built-in seat in which the airbag module is equipped in one side portion of the seat back and the sewing line between the side surface skin of the seat skin and the bank skin is formed as a rupture portion having a predetermined length,
In addition to sewing the front edge of the front skin that has been sewn into a predetermined three-dimensional shape from the bank skin and the seat skin, the ball edge is sewn to the terminal around the three sides of the skin with small upper and lower sewing threads. The side skin is sewn between the terminals around the three sides of the skin part together with the bead from the upper and lower sewing threads containing at least one yarn of the count, and further, at least the airbag module Provide a broken part that is double-sewn between the skin part and the terminal with a small upper and lower sewing thread on the upper and lower sides of the side skin that is continuous from the housing location,
A seat with a built-in airbag module, characterized in that the terminal sewn portion of the bank skin and the seat surface skin and the end of the side skin are suspended and fixed to the seat back frame side by a metal wire suspension member. .

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