JP3803938B2 - 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 a side portion of a seat back.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, various types of automobile seats in which an airbag module of an airbag device is built in a side portion of a seat back have been proposed. When it is roughly divided from the form of the side surface of the seat back, it is assembled by inflating the side surface of the seat back in which the airbag module is incorporated, and the side of the seat back even if the airbag module is incorporated. Some parts are assembled flat.
[0003]
Among the above-mentioned, as for assembling the side surface of the seat back flat, a flat side plate is provided on one side of the seat back frame, and the plate surface of this side plate is used as an installation part of the airbag module. (JP-A-8-169264).
[0004]
In the seat back, a notch is provided on the plate surface from one side of the side plate, and an auxiliary plate having a recess capable of accommodating the airbag module is fitted and fixed to the notch, and the airbag module is attached to the auxiliary plate. It is assembled so that the side surface of the seat back is kept flat by being assembled and housed in the recess and encapsulated by the seat skin together with the cushion pad.
[0005]
[Problems to be solved by the invention]
In the present invention, the side plate provided on one side of the seat back frame is used as an installation part of the airbag module, and the side surface of the seat back is kept flat from a small number of parts while maintaining the rigidity of the side plate, thereby ensuring the airbag. An object is to provide a seat with a built-in airbag module that can be inflated and deployed.
[0006]
[Means for Solving the Problems]
The airbag module built-in seat according to the present invention includes a side plate provided with a stepped surface for stepping the plate surface inwardly from a flange portion fixed to the longitudinal axis portion of the seatback frame. the side plate of the edge side is located on the front side side portion fixing attached to the seat back frame flange, with assembling the airbag module on the stepped portion side of the side plate, an opening which substantially corresponds to the outer shape of the airbag module Part is provided in the side pad part, and the cushion side pad located in the mouth of the opening part is assembled to the seat back frame.
For the front skin part sewn in the specified three-dimensional shape from the bank skin and the seat surface skin, the side skin is sewn between the terminals around the three sides of the skin part from the upper and lower sewing threads containing at least one large count thread on one side At the same time, except for the location where the airbag module is accommodated, the side where the broken part is double-sewn between the skin and the end of the side skin from the small upper and lower sewing threads of the side surface at least from the accommodation location of the airbag module. It is configured by covering a cushion pad with a seat cover provided at a sewing portion between the cover and the bank cover.
[0007]
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.
[0008]
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. The seat back frame 1 is provided with side frames 11 and 12 supporting the bank pad portion 21 from the inside near the side pad portion 20 of the cushion pad 2 by being attached and fixed on the axis of each of the vertical axis portions 10a and 10b. It has been.
[0009]
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 vertical axis portions 10 a, 10 b by being fastened to the seat back frame 1 with a stopper 13 such as a retainer.
[0010]
In the seat back frame 1, a side provided with a step surface 11 b 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. A 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.
[0011]
The side plate 11 is equipped with an airbag module E attached to the step 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.
[0012]
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.
[0013]
The cushion pad 2, by positioning the air bag e ₂ side in the mouth of the opening 22, are 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 Yes.
[0014]
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 this sheet skin 3, a wadding 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.
[0015]
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.
[0016]
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.
[0017]
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.
[0018]
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.
[0019]
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.
[0020]
At the same time, except for the accommodation location of the air bag module E corresponding to the predetermined length L ₁ described above, the front surface of the surface skin portion 31 at least vertically toward L _2, L ₃ of the side cover member 30 from the small and below the sewing thread 51a of count , 32 and the terminal are double-sewn. 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.
[0021]
According to the sewing, the seat skin 3 is sewn into a predetermined three-dimensional shape without providing an opening in the seat skin and attaching another member for enveloping the airbag module. it can be kept capable of forming sewing point by only upper and lower suture 50 comprising thin thread of a large count as breaking portion 5 having a predetermined length L _1, the form of the seat back B as usual.
[0022]
The above-mentioned sewing location with a small count thread may be further double-sewn with thick and strong sewing threads 51a and 51b having different counts of about 5 or 8. 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.
[0023]
In order to suspend and fix the seat skin 3, as shown in FIG. 1, the end of the side cover member 30 covering the side pad portion 20 of the cushion pad 2 and the bank cover covering 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 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.
[0024]
The metal wire made of hanging narrowing member 6a, according to 6b, can be firmly Tsukomi fastened to 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.
[0025]
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 notches 30b at regular intervals along the longitudinal direction of the tip of the bag portion 30a. Further, as the suspension member 6a, a member in which a plurality of latching rings 60b in which the axis of the metal wire 60a is bent and formed in a U-shape corresponding to the notches 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.
[0026]
The suspending member 6a protrudes outwardly from the cutout portion 30b of the bag portion 30a and the entire hook ring 60b of the metal wire 60a is inserted into the bag portion 30a to thereby insert the bag portion 30a of the side cover member 30. Assemble to. 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.
[0027]
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.
[0028]
In the hanging member 6b, the hooking ring 62a on one end side is hooked on the listing wire 61b of the hanging bag 61a, and the hooking ring 62b on the other end side is hooked through the hooking hole 24 of the cushion pad 2. .. Can be suspended and fixed to the seat back frame 1 by hooking on any of the zigzag springs 14a, 14b... 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.
[0029]
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.
[0030]
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, can be reliably breaking open the rupture portion 5 at the inflation of the airbag e _2.
[0031]
【The invention's effect】
As described above, according to the seat with a built-in airbag module according to the present invention, since the airbag module is accommodated and installed on the stepped surface of the side plate, the side surface of the seat back is not inflated. Keeping the flat part and keeping the seat back in the normal shape, and providing the step part on the side plate as the air bag module's equipment, the side plate is kept rigid while keeping the side plate rigid. Not only can the plate be assembled and supported stably, but the upper and lower sewing threads that contain at least one large count thread are sewn between the terminals around the three sides of the outer skin from the upper and lower sewing threads. A broken part of the side skin that is double-sewn between the skin part and the terminal at the top and bottom that is continuous from at least the location of the airbag module. To provide a sewing point of the side surface skin and the bank epidermis over preparative epidermis, can be reliably opened breaking portion by the expansion of the airbag.
[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 Seatback E Airbag module e ₂ Airbag 1 Seatback frame 10a, 10b Vertical axis portion of the seatback frame 11 Side plate 11a Flange portion of the side plate 11b Stepped surface of the side plate 11c Stepped edge of the side plate 2 Cushion Pad 20 Side pad portion 21 Bank pad portion 22 Opening portion 23 Seat surface pad portion 3 Seat skin 30 Side surface skin 31 Bank surface skin 32 Seat surface skin 5 Breaking portion 50 Sewing thread including large count yarn 51a, 51b Small count sewing thread 54 Small Count sewing thread

Claims (1)

Comprising a side plate having a stepped portion surface that indented inwardly the plate surface from the flange portion fixed Ategai the longitudinal axis of the seat back frame, the flange side plates by positioning the indented edge side on the front side The air bag module is fixedly attached to one side portion of the seat back frame, and the airbag module is assembled to the stepped surface of the side plate, and an opening substantially corresponding to the outer shape of the air bag module is provided in the side pad portion. Assemble the cushion pad located on the airbag side in the mouth of the opening to the seat back frame,
For the front skin part sewn in the specified three-dimensional shape from the bank skin and the seat surface skin, the side skin is sewn between the terminals around the three sides of the skin part from the upper and lower sewing threads containing at least one large count thread on one side At the same time, except for the location where the airbag module is accommodated, the side where the upper and lower sides of the side skin continuous from the location where the airbag module is located at least from the upper and lower sewing threads of the count is double sewn between the skin and the end A seat with a built-in airbag module, characterized by covering a cushion pad with a seat skin provided at a sewing portion between the skin and the bank skin.

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