JP4601786B2 - Side impact airbag device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a side collision airbag apparatus that restrains an occupant by deploying an airbag from a side surface of a seat back into a vehicle interior with high-pressure gas generated by an inflator during a side collision of a vehicle.
[0002]
[Prior art]
Such a side-impact airbag device is known from JP-A-9-71212. The airbag apparatus for side collision described in the above-mentioned Japanese Patent Application Laid-Open No. 9-71212 has an airbag case in which a folded airbag is accommodated at a side portion of a seat back, and the pressure of the airbag that expands at the time of a vehicle collision Thus, the sewing portion for sewing the skin of the seat is broken to form an opening, and the airbag is deployed through the opening into the vehicle interior. And, in order to prevent the sewn portion of the seat from moving outward due to the pressure at which the airbag is inflated, the sewn portion is connected to a fixing member inside the seat with a belt-like body made of a material that is difficult to stretch. .
[0003]
[Problems to be solved by the invention]
However, although the above-mentioned conventional one can prevent the sewing part of the seat from moving outward in the belt-like body, it cannot prevent the seat skin from extending due to the pressure at which the airbag is inflated. Further, there is a possibility that the pressure of the airbag is not sufficiently transmitted to the sewing part due to the elongation of the skin of the sheet, and the sewing part cannot be reliably broken.
[0004]
The present invention has been made in view of the above-described circumstances, and aims to form an opening for deploying an airbag by reliably breaking a sewing portion on a side surface of a seat back in a side collision airbag device. To do.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a module case including a case main body for storing a folded airbag and a lid hinged to the case main body is mounted on the seat back. The lid of the module case is opened by the pressure of the airbag that is placed on the side and inflates when the vehicle collides, and the sewing portion of the covering material that covers the seat back is broken, and the airbag is passed through the opening formed in the cabin. In the side collision airbag device to be deployed, the holding member fixed to the module case is provided with a locking portion in contact with the case body, and the locked portion provided at the base end is detachable from the locking portion. the locked, the load transmission member whose tip is coupled to the sewing portion of the dressing, along the outer surface of the lid of the sewing unit until the module case from the locking portion As well as disposed, the locked portion provided at the base end is engaged detachably to the engaging portion, the coupling auxiliary load transmission member to the sewn portion of the tip dressing, said from the locking portion The sewing part is arranged along the outer surface of the case body of the module case, and the sewing part where the load transmission member and the auxiliary load transmission member are sewn is arranged at a position where the sewing part comes into contact with the front edge of the lid. A featured side impact airbag device is proposed.
[0006]
According to the above configuration, the engaging portion provided in a portion where the holding member fixed to the module case is in contact with the case body, locking the proximal end of the load transmitting member to the engaging portion of the holding member, and engaging the load transfer member Since the tip is connected to the sewing part of the covering material along the outer surface of the lid of the module case from the stop part to the sewing part, the load of the lid that is opened by the pressure at which the airbag is inflated is directly passed through the load transmission member It is possible to form an opening through which the airbag is deployed by reliably breaking the sewn portion without causing the covering material to stretch and transmitting to the sewn portion.
[0007]
In addition, the base end of the auxiliary load transmission member is coupled to a position where the module case comes into contact with the case main body, and the auxiliary load transmission member is placed along the outer surface of the case main body from the locking portion to the sewing portion, and the tip of the auxiliary load transmission member is the sewing portion of the covering material As a result, the sewing part pulled by the load transmission member is restrained by the auxiliary load transmission member so that the sewing part does not move from the position where it abuts the front edge of the lid, and the sewing part is more securely broken and the airbag is Opening openings can be formed.
[0008]
In particular, since the sewing portion where the load transmission member and the auxiliary load transmission member are sewn is arranged at a position where it abuts on the front edge of the lid, the load of the load transmission member acting in the direction in which the front edge of the lid opens and the case body The load of the auxiliary load transmitting member acting along the outer surface acts directly on the sewing portion from different directions, and the sewing portion can be effectively torn and broken by these two loads.
[0009]
The first webbing 46 of the embodiment corresponds to the load transmission member of the present invention, the second webbing 47 corresponds to the auxiliary load transmission member of the present invention, and the webbing holding plate 35 of the embodiment is the present invention. The hooks 35b and 35c of the embodiment correspond to the locking portion of the present invention, and the reinforcing rings 46a and 47a of the embodiment correspond to the locked portion of the present invention.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings. 1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view of a seat provided with a side collision airbag device, FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. FIG. 4 is an exploded perspective view of the module case, the bundling holding member and the bundling, and FIG. 5 is an operation explanatory view when the airbag is deployed.
[0011]
As shown in FIG. 1, a seat S for a driver of an automobile is provided at a seat cushion 1 that is disposed substantially horizontally, a seat back 2 that extends rearward and upward from the rear end of the seat cushion 1, and an upper end of the seat back 2. The headrest 3 is formed. An airbag module M housed in a module case 4 is disposed inside the right side surface of the seat back 2, and when the airbag module M is operated, the airbag 5 opens the module case 4 and is seated on the seat S. It develops diagonally forward so as to block between the right side of the occupant and the left side of the right front door 6 (see FIG. 5).
[0012]
As is clear from the cross section of the seat back 2 shown in FIG. 2, a plate-like seat frame 12 is fixed to a pipe-like seat frame 11 extending in the vertical direction along the right side portion of the seat back 2, and this plate-like seat. The module case 4 is fixed to the right side surface of the frame 12 with bolts 14 and 14 and nuts 15 and 15. A spring 16 is stretched on the inner periphery of the pipe-shaped seat frame 11, and a shape retaining material 17 made of a coarse blanket and a pad 18 made of a sponge are arranged from the front surface of the spring 16 to the periphery of the module case 4. .
[0013]
The front center portion of the seat back 2 is covered with the first covering material 22, and the left and right side portions of the first covering material 22 to the front side surface of the seat back 2 are sewn to the first covering material 22 at the sewing portion 20. The second covering member 23 is covered with the third covering member 24 sewn on the second covering member 23 at the sewing portion 25 from the rear side to the rear side of the seat back 2. The first to third covering materials 22, 23, 24 have substantially the same structure, and are integrally coupled to the inner wadding covers 22a, 23a, 24a and the outer surfaces of the wadding covers 22a, 23a, 24a, respectively. The waddings 22b, 23b, and 24b are made of a thin sponge, and the trim covers 22c, 23c, and 24c are made of leather or cloth superimposed on the outer surfaces of the wadings 22b, 23b, and 24b. However, only the first covering material 22 has a wading 22b divided into two layers, and a single wading cover 22a and a heater 26 are sandwiched therebetween. In addition, a synthetic resin plate 27 for maintaining the form of the third covering material 24 is superimposed on the front surface of the wading cover 24a.
[0014]
A hanging bag 28 in which a belt-like material having strength such as tricot is folded in half is integrally sewn on the sewing portion 20 of the first covering material 22 and the second covering material 23. A stainless steel wire 29 is housed inside the hanging bag 28, and the other ends of the plurality of hooks 30, with one end locked to the wire 29, are locked to the spring 16.
[0015]
Next, the structure of the airbag module M will be described with reference to FIGS.
[0016]
The metal retainer 31 includes a main body portion 31a having a J-shaped cross section and a pair of clamp portions 31b and 31b extending from one side edge of the main body portion 31a. The main body portion 31a and the clamp portions 31b and 31b. A substantially cylindrical inflator 32 filled with propellant is supported on the circular cross-section formed by the above. The retainer 31 and the inflator 32 are stored so as to be wrapped in the base end portion of the folded airbag 5. The bolts 14, 14 pass through the clamp portions 31 b, 31 b of the retainer 31, the main body portion 31 a and the webbing holding plate 35 and are fastened by nuts 34, 34, and further pass through the plate seat frame 12 to form the nuts 15, 15 is fastened.
[0017]
The retainer 31, the webbing holding plate 35, the inflator 32, and the folded airbag 5 are housed inside a module case 4 that is integrally formed of synthetic resin. The module case 4 includes a tray-like case body 36 that opens toward the right side of the vehicle body, and a lid 37 that is connected to the rear portion of the case body 36 via a hinge portion 38. The five hooks 36a provided on the front edge and the lower edge are engaged with the five hook engaging holes 37a provided on the upper edge, the front edge and the lower edge of the lid 37, thereby opening the case body 36. The lid 37 is fixed so as to cover. The module case 4 is fixed so that the bottom surface of the case body 36 is in contact with the plate-like seat frame 12.
[0018]
3 and 4 together, the baffle holding plate 35 includes a main body portion 35a along the bottom surface of the case main body 36 of the module case 4 and four hooks protruding from the four corners of the main body portion 35a. 35b, 35b; 35c, 35c, and bolt holes 35d, 35d formed in the main body portion 35a through which the bolts 14, 14 pass. The four hooks 35b, 35b; 35c, 35c of the forceps holding plate 35 protrude outward from the four openings 36b ... formed in the module case 4 case body 36.
[0019]
A pair of reinforcing rings 46a, 46a are fixed to the base end of the first force cloth 46 made of a triangular cloth piece having sufficient strength against a tensile load, and these reinforcing rings 46a, 46a are connected to the force cloth holding plate. The first force cloth 46 locked to the two hooks 35b and 35b on the rear side of the 35 is wound from the rear surface of the case body 36 of the module case 4 along the outer surface of the lid 37, and the narrow tip is formed. The second covering material 23 and the third covering material 24 are integrally sewn to the sewing portion 25. A pair of reinforcing rings 47a and 47a are fixed to the base end of a second force cloth 47 made of the same material as that of the first force cloth 46, and the reinforcing rings 47a and 47a are connected to the force cloth. The second force cloth 47 locked to the two hooks 35c, 35c on the front side of the holding plate 35 extends along the front surface of the case body 36 of the module case 4 and has a narrow tip at the second covering material 23. And it sews on the sewing part 25 of the 3rd coating | covering material 24 integrally.
[0020]
In addition, the 1st force cloth 46 comprises the load transmission member of this invention, and the 2nd force cloth 47 comprises the auxiliary load transmission member of this invention.
[0021]
Next, the operation of the embodiment of the present invention having the above-described configuration will be described.
[0022]
When a lateral acceleration of a predetermined value or more is detected at the time of a side collision of the vehicle, the inflator 32 of the airbag module M is ignited, and the airbag 5 is inflated by the generated high-pressure gas. When the pressure at which the airbag 5 inflates acts on the inner surface of the lid 37 of the module case 4, the hook engaging holes 37a at the front edge of the lid 37 come off from the case body 36 hooks 36a, and the lid 37 has a hinge portion at the rear edge. Rotate rightward with 38 as a fulcrum. As a result, tension is generated in the first force cloth 46 pushed by the lid 37, and the sewn portion 25 of the second covering material 23 and the third covering material 24 is pulled backward by this tension. On the other hand, since the sewing portion 25 is restrained by the second force cloth 47 and is prevented from moving backward, a strong tensile force acts on the sewing portions 25 of the second covering material 23 and the third covering material 24. Break. And the airbag 5 expand | deploys so that a passenger | crew and the inner surface of the right front door 6 may be interrupted | blocked from the opening 48 (refer FIG. 5) formed in the side surface of the seat back 2 by the fracture | rupture of the sewing part 25. FIG.
[0023]
As described above, the base ends of the first and second webbings 46 and 47 formed of a material that does not easily stretch are fixed to a position in contact with the case main body 36 of the module case 4 via the webbing holding member 35, and the first Since the webbing 46 is placed along the outer surface of the lid 37 of the module case 4, the positions of the first and second webbings 46 and 47 are restrained by the surface of the module case 4. Therefore, strong tension is generated in the first and second webbings 46 and 47 by the load that the lid 37 opens while suppressing the elongation of the second covering material 23 and the third covering material 24, and the tension is applied to the sewing portion 25. It can be effectively transmitted and reliably broken. In particular, since the tips of the first and second force cloths 46 and 47 connected to the sewing portion 25 are formed with a narrow width, the tension of the first and second force cloths 46 and 47 is concentrated at one point for sewing. The part 25 can be broken more reliably.
[0024]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0025]
For example, in the embodiment, the side collision airbag device on the driver's seat side is illustrated, but the present invention can also be applied to a side collision airbag device on the passenger seat side. In the embodiment, the base ends of the first and second webbings 46 and 47 are fixed via the webbing holding member 35, but they may be directly fixed to the case main body 36 of the module case 4.
[0026]
【The invention's effect】
As described above, according to the first aspect of the present invention, the holding member fixed to the module case is provided with the locking portion in contact with the case body, and the base end of the load transmitting member is used as the locking portion of the holding member. Since the front end is coupled to the sewing part of the covering material along the outer surface of the lid of the module case from the locking part to the sewing part , the tip of the load transmission member is coupled to the sewing part of the covering material. The load can be directly transmitted to the sewing portion via the load transmission member, and the opening can be formed in which the airbag is deployed by reliably breaking the sewing portion without causing elongation of the covering material.
[0027]
In addition, the base end of the auxiliary load transmission member is coupled to a position where the module case comes into contact with the case main body, and the auxiliary load transmission member is placed along the outer surface of the case main body from the locking portion to the sewing portion, and the tip of the auxiliary load transmission member is the sewing portion of the covering material As a result, the sewing part pulled by the load transmission member is restrained by the auxiliary load transmission member so that the sewing part does not move from the position where it abuts the front edge of the lid, and the sewing part is more securely broken and the airbag is Opening openings can be formed.
[0028]
In particular, since the sewing portion where the load transmission member and the auxiliary load transmission member are sewn is arranged at a position where it abuts on the front edge of the lid, the load of the load transmission member acting in the direction in which the front edge of the lid opens and the case body The load of the auxiliary load transmitting member acting along the outer surface acts directly on the sewing portion from different directions, and the sewing portion can be effectively torn and broken by these two loads.
[Brief description of the drawings]
1 is a perspective view of a seat provided with a side collision airbag device. FIG. 2 is an enlarged sectional view taken along line 2-2 in FIG. 1. FIG. 3 is a view taken along line 3-3 in FIG. Exploded perspective view of the case, baffle holding member and baffle [FIG. 5] Explanatory drawing of the action when the airbag is deployed [Explanation of symbols]
2 Seat back 4 Module case 5 Air bag 23 Second covering material (covering material)
24 Third covering material (covering material)
25 Sewing part 35 Force cloth holding plate (holding member)
35b Hook (locking part)
35c hook (locking part)
36 Case body 37 Lid 46 First buff (load transmission member)
46a Reinforcing ring (locked part)
47 Second force cloth (auxiliary load transmission member)
47a reinforcement ring (locked part)
48 opening

Claims (1)

A module case (4) having a case main body (36) for housing the folded airbag (5) and a lid (37) hinged to the case main body (36) is provided on the side of the seat back (2). The sewn part (23, 24) of the covering material (23, 24) that opens the lid (37) of the module case (4) and covers the seat back (2) with the pressure of the airbag (5) that is inflated when the vehicle collides 25) in a side-impact airbag device in which the airbag (5) is deployed into the vehicle compartment through an opening (48) formed therein.
The module case (4) fixed holding member (35) engaging at a portion contacting the case main body (36) (35b, 35c) and is provided, locked portion provided at the proximal end (46a) of the The load transmitting member (46), which is detachably locked to the locking portion (35b) and whose tip is coupled to the sewing portion (25) of the covering material (23, 24), is connected to the locking portion (35b) from the locking portion (35b). Arranged along the outer surface of the lid (37) of the module case (4 ) up to the sewing part (25) ,
Auxiliary load transmission in which the locked portion (47a) provided at the base end is detachably locked to the locking portion (35c) and the tip is coupled to the sewing portion (25) of the covering material (23, 24). The member (47) is arranged along the outer surface of the case body (36) of the module case (4) from the locking portion (35c) to the sewing portion (25),
For the side collision, the sewing part (25) to which the load transmission member (46) and the auxiliary load transmission member (47) are sewn is disposed at a position in contact with the front edge of the lid (37) . Airbag device.

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