JP3793884B2 - Airbag module built-in seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in an airbag module built-in seat in which an airbag module 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 is installed 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.
[0003]
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. However, 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]
The present invention is equipped with an airbag module in one side portion of a seat back so that the rupture portion of the seat cover can be surely expanded as the airbag is inflated while maintaining the appearance of the seat back as usual. An object of the present invention is to provide a seat with a built-in airbag module.
[0005]
[Means for Solving the Problems]
In the seat with a built-in airbag module according to the present invention, the upper and lower sewing threads including at least one side of a large count thread on the front surface skin portion sewn in a predetermined three-dimensional shape from the bank surface and the seat surface skin Is sewn between the terminals around the three sides of the skin part, and at least the side surface skin that is continuous from the housing part of the airbag module is removed with upper and lower sewing threads with a small count, except for the housing part of the airbag module. Provide a ruptured portion that is double-sewn between the skin and terminal,
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 using a seat back frame 1 that is formed by bending an axis from a metal round pipe into a substantially quadrilateral shape. Side frames 11 and 12 that support 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 provided.
[0008]
One of the side frames 11 and 12 is a side plate formed from a strip-like plate member, and the other 12 is a wire frame in which the wire member is axially bent so as to correspond to the raised shape of the bank pad portion 21. Become. In addition, a plurality of zigzag springs 14 a, 14 b... Are provided between the shafts of the vertical 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, a step surface 11 b for accommodating the airbag module E is provided 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. A side plate 11 is provided. The step surface 11b is formed with a space or an area that can accommodate the airbag module E. The side plate 11 is provided on one side portion of the seat back frame 1 by fixing the stepped edge 11c to the front side and fixing it to the longitudinal axis portion 10a of the seat back frame 1 with a flange portion 11a.
[0010]
The side plate 11 is equipped with an airbag module E attached to the stepped surface 11b. The airbag module E will and a module body e ₁ and the air bag e ₂ containing gas generating unit, by accommodating place the entire inside of the stepped portion surface 11b by positioning the air bag e ₂ outwardly It is assembled.
[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 formed by foaming from the side surface pad portion 20, bank pad portion 21 and seat surface pad portion 23. As shown in FIG. 1, the cushion pad 2 is provided with an opening 22 in the plane of the side surface pad portion 20 by cutting out the thickness of the side surface pad portion 20 and substantially corresponding to the outer shape of the airbag module E. .
[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. As the sheet skin 3, a wadding cover in which a skin material 3a, a wadding material 3b, and a backing material 3c are laminated together 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]
When the seat back B is assembled by incorporating the airbag module E in this way, the airbag module E is accommodated and installed in the stepped surface 11b of the side plate 11, so the seat back B is the side cover of the seat skin 3. The side surface can be kept flat without causing the material 30 to bulge.
[0015]
The airbag module E is because it is assembled so as to be substantially flush with the outer surface of the side pad portion 20 in the airbag e ₂ side to position the airbag e ₂ side in the mouth of the opening 22, the air bag e _{Since the} cushion pad 2 does not get in the way when the airbag ₂ is inflated and deployed, and the seat skin 3 can be directly pressed by the airbag e ₂ , a later-described fracture portion can be reliably expanded as the airbag e ₂ is inflated. The side surface of the seat back B can be kept flat and assembled.
[0016]
Since the side plate 11 is provided with a stepped surface 11b as an installation location 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 used for the airbag. The 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]
The sewing part 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]
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 good to suspend and fix the terminal sewing part of the seat surface cover material 22 which covers the cover material 31 and the seat surface pad part 22 to the seat back frame 1 with the suspending members 6a and 6b made of metal wires.
[0023]
According to the metal wire made of hanging narrowing member 6a, 6b, 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 opened with a broken part 5 of the seat skin 3 to inflate the air bag e _2.
[0024]
As shown in FIG. 5, the side cover member 30 is suspended by sewing the end of the side cover member 30 into a bag shape, and providing a plurality of cutout portions 30b at regular intervals along the longitudinal direction of the tip of the bag portion 30a. Further, as the suspending member 6a, a member provided with a plurality of retaining rings 60b formed by bending the axis of the metal wire 60a into a U-shape so as to correspond to the cutout portions 30b of the side cover member 30 can be used. 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.
[0025]
The suspending member 6a is configured such that each latch ring 60b of the metal wire 60a protrudes outward from the cutout portion 30b of the bag portion 30a and is entirely inserted into the bag portion 30a to thereby form the bag portion of the side cover member 30. Assemble to 30a. In this suspending member 6a, a U-shaped hooking ring 60b is engaged with a protruding piece 13b of a zigzag spring stopper 13a attached and fixed to the 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.
[0026]
As shown in FIG. 5, a hanging bag 61a is sewed together at the terminal sewing portion of the bank cover material 31 and the seating surface cover material 32, and a linear listing wire 61b is inserted into the hanging bag 61a. Prepare. Further, as the hanging member 6b, it is possible to use a wisdom ring-shaped latching ring 62a, 62b formed by bending at both ends of the metal wire 62c.
[0027]
In the suspension member 6b, the latch ring 62a on one end side is latched on the listing wire 61b of the suspension bag 61a, and the latch ring 62b 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 hanging structure, the hanging bag 61a may be sewn with a thick and strong sewing thread 53 of about No. 5, which is smaller in both the upper and lower parts than the other parts.
[0028]
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.
[0029]
According to its cover member, a metal wire made of hanging narrowing member 6a, with 6b, because it opposes the expansion of the air bag e _2, it is possible to reliably open the breaking portion 5 at the inflation of the airbag e _2.
[0030]
【The invention's effect】
As described above, according to the airbag module built-in sheet according to the present invention, the side skin is sewn between the terminals around the three sides of the skin portion with the upper and lower sewing threads including at least one large yarn on one side, and the air Except for the location where the bag module is accommodated, at least the side skin that is continuous from the location where the air bag module is accommodated is provided with a ruptured portion that is double-sewn between the skin and the end with a small upper and lower sewing thread, and the side skin and bank Since the skin is firmly suspended and fastened so as to be strongly pulled and held by a metal wire suspension member that can resist the inflation of the airbag, the rupture portion of the seat skin should be surely opened as the airbag is inflated. Can do.
[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 view showing the suspension structure of the seat skin on the terminal side of the side skin.
FIG. 6 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 1 Seat back frame 2 Cushion pad 3 Seat skin 30 Side skin 31 Bank surface skin 32 Seat surface skin 5 Breaking portion 50 Sewing thread including a large count thread 51a, 51b Small count sewing thread 54 Small count sewing thread 6a, 6b Hanging 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,
For the front skin part sewn in the specified three-dimensional shape from the bank skin and the seat skin, the side skin is sewn between the terminals around the three sides of the skin part with upper and lower sewing threads that contain at least one large count thread. At the same time, except for the location where the airbag module is accommodated, at least a side portion of the side skin that is continuous from the location where the airbag module is accommodated has a broken portion that is double-sewn between the skin portion and the terminal with a small upper and lower sewing thread. Provided,
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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