JP3472537B2 - Airbag device for side collision - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure gas generated by an inflator at the time of a side collision of a vehicle, whereby an airbag is deployed from a side of a seat back into a vehicle interior to restrain an occupant. The present invention relates to a side collision airbag device. 2. Description of the Related Art Such an air bag apparatus for side collision is known from Japanese Patent Application Laid-Open No. 11-78758. In this airbag device, an airbag case containing a folded airbag is arranged on a side portion of a seatback, and a sewing portion for sewing a skin of a seat by the pressure of an airbag inflating at the time of a collision of a vehicle is broken and opened. Is formed, and the airbag is deployed into the vehicle interior through the opening. When the folded airbag is inflated with the high-pressure gas supplied from the inflator, only the base end of the airbag into which the high-pressure gas flows in the initial stage of inflation is moved in the vertical and horizontal directions. There was a possibility that the expansion toward the front was delayed and smooth deployment was hindered. [0004] The present invention has been made in view of the above circumstances, in an airbag apparatus for lateral collision, and an object thereof is to the initial stage of airbag inflation Ru inflated smoothly forward. According to the first aspect of the present invention, a folded airbag and a high-pressure gas can be supplied into the airbag.
A module case for storing the inflator is placed on the side of the seat back, and the
In the side collision airbag device, the module case is opened by the pressure of the inflating airbag supplied with the high-pressure gas and the airbag is deployed forward .
The airbag expands up and down and left and right in the initial stage of inflation
By regulating the energy of the high-pressure gas forward.
There has been proposed a side collision airbag apparatus characterized in that the upper and lower surfaces and the left and right surfaces of the folded airbag are covered with a band-shaped deployment regulating member so that the airbag can be concentrated and smoothly deployed . According to the above construction, the upper and lower surfaces and the left and right surfaces of the folded airbag are covered with the band-shaped deployment regulating members, so that when the high-pressure gas flows into the airbag from the inflator at the time of a vehicle collision , the airbag moves up and down. The expansion restricting member restricts the inflation in the left-right direction, so that the energy of the high-pressure gas can be concentrated forward to smoothly deploy the airbag. Incidentally, the deployment regulating cloth 42 of the embodiment corresponds to the deployment regulating member of the present invention. An embodiment of the present invention will be described below based on an embodiment of the present invention shown in the accompanying drawings. FIGS. 1 to 7 show a first embodiment of the present invention. FIG. 1 is a perspective view of a seat provided with an airbag device for side collision, and FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. FIG. 3, FIG. 3 is a view in the direction of arrow 3 in FIG. 2, FIG. 4 is a sectional view taken along line 4-4 in FIG.
FIG. 6 is a perspective view of an airbag, a protective cloth and a deployment regulating cloth, FIG.
FIG. 7 is an operation explanatory view of the deployment regulating cloth, and FIG. 7 is an operation explanatory view at the time of deployment of the airbag. As shown in FIG. 1, a driver's seat S for an automobile includes a seat cushion 1 disposed substantially horizontally.
And a seat back 2 extending rearward and upward from a rear end of the seat cushion 1, and a headrest 3 provided at an upper end of the seat back 2. An airbag module M housed in a module case 4 is arranged inside the right side surface of the seat back 2. When the airbag module M is activated, the airbag 5 opens the module case 4 and sits on the seat S. The vehicle is deployed 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. 7). As is clear from the cross section of the seat back 2 shown in FIG. 2, a plate-shaped seat frame 12 is fixed to a pipe-shaped seat frame 11 extending vertically along the right side of the seat back 2. The module case 4 is provided with bolts 14 and 14 on the right side surface of the plate-like seat frame 12.
And nuts 15, 15. A spring 16 is stretched around the inner periphery of the pipe-shaped seat frame 11.
A shape-retaining material 17 made of a coarse blanket and a pad 18 made of a sponge are arranged around the periphery of the box. A central portion of the front surface of the seat back 2 is covered with a first covering material 22, and from the left and right sides of the first covering material 22 to the front side of the seat back 2, a sewing portion 20 is attached to the first covering material 22. The second backing material 23 sewn in the second backing material 23, and the third backing material 24 sewn on the second backing material 23 at the sewn portion 25 covers the rear surface of the seat back 2 from the rear side to the back surface. First to third coating materials 22, 23,
Reference numeral 24 has substantially the same structure, and includes wadding covers 22a, 23a, 24a on the inner side, and waddings 22b, 23 each formed of a thin sponge integrally joined to the outer surfaces of the wadding covers 22a, 23a, 24a.
b, 24b and a trim cover 2 made of leather or cloth superposed on the outer surfaces of the wadings 22b, 23b, 24b.
2c, 23c and 24c. However, only the first covering member 22 has the wading 22b divided into two layers, and one wadding cover 22a and the heater 26 are further interposed therebetween. On the front surface of the wading cover 24a of the third covering material 24, a synthetic resin plate 27 for maintaining the form is superimposed. A hanging bag 28 formed by folding a band-shaped material having strength, such as a tricot, into two is sewn integrally to the sewing portion 20 of the first coating material 22 and the second coating material 23. A stainless steel wire 29 is housed inside the hanging bag 28, and the other ends of the plurality of hooks 30. Next, the structure of the airbag module M will be described with reference to FIGS. The metal retainer 31 includes a main body 31a having a J-shaped cross section and a pair of clamps 31b, 31b extending from one side edge of the main body 31a. A substantially cylindrical inflator 32 filled with a propellant inside is supported by a circular cross section formed by 31b and 31b. Retainer 31
And the inflator 32 is provided with the folded airbag 5.
It is stored so as to be wrapped around the base end. The bolt 1
Reference numerals 4 and 14 denote clamp portions 31b and 31b of the retainer 31,
It is fastened by nuts 34, 34 through the main body 31 a and the side plate 33, and further fastened by nuts 15, 15 through the plate-shaped seat frame 12. The retainer 31, the side plate 33, the inflator 32, and the folded airbag 5 are housed in a module case 4 integrally formed of synthetic resin. The module case 4 includes a tray-shaped case body 36 that opens toward the right side of the vehicle body, and a lid 37 that is connected to a 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 engagement holes 37a provided on the upper edge, the front edge and the lower edge of the lid 37, so that the opening of the case body 36 is opened. Lid 37 is fixed so as to cover. The module case 4 is fixed by sandwiching the case body 36 between the side plate 33 and the plate-shaped seat frame 12. 4, 5 and 6 (a), the folded airbag 5 is wrapped by a protective cloth 41 having a cylindrical front and rear surface and left and right surfaces. The slit 41c of the protective cloth 41 is provided on the front surface.
Is located. Further, the upper and lower surfaces and left and right surfaces of the airbag 5 wrapped in the protective cloth 41 are wrapped by a band-shaped deployment regulating cloth 42, and two bolt holes 42a, 42a formed at both ends of the deployment regulating cloth 42 are provided. Two bolts 14,
14. Next, the operation of the embodiment of the present invention having the above configuration will be described. When a lateral acceleration equal to or more than a predetermined value is detected during a side collision of the vehicle, the inflator 32 of the airbag module M fires to generate high-pressure gas, and the airbag 5 supplied with the high-pressure gas expands. When started, the slit 41c of the protective cloth 41 breaks. When the airbag 5 is further inflated and presses the inner surface of the lid 37 of the module case 4, the hook engagement holes 37a at the front edge of the lid 37 are disengaged from the hooks 36a of the case body 36, and the lid 37 is hinged at the rear edge. It rotates to the right around the fulcrum 38. As a result, the lid 37 presses the inner surface of the third coating material 24 to break the sewn portion 25 with the second coating material 23, and the opening 43 formed on the side surface of the seat back 2 due to the breakage of the sewn portion 25.
From FIG. 7, the airbag 5 is deployed so as to block between the occupant and the inner surface of the right front door 6. At the initial stage of inflation of the airbag 5, that is, when the base end of the folded airbag 5 starts to inflate, FIG.
As shown in (b), since the deployment regulating cloth 42 covers the upper and lower surfaces and the left and right surfaces of the airbag 5, the inflation energy of the airbag 5 acts forward, and the slit 41 c of the protective cloth 41 is quickly moved. To make the airbag 5 freely inflatable. In this way, by restricting the expansion of the airbag 5 in the up-down direction and the left-right direction at the initial stage of inflation by the deployment restricting cloth 42, the airbag 5 is quickly inflated forward and the occupant and the right front door 6 are inflated. It may be deployed smoothly between the inner surface. Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, a protective cloth 41 and a deployment regulating cloth 42 are combined in a cross shape to constitute one member. The protective cloth 41 has four bolt holes 41a, 41a;
b, 41b and a slit 41c, and four bolt holes 41a, 41a;
Locked to 4,14. In this state, the slit 41c is located on the front surface of the folded airbag 5. And, by the deployment regulating cloth 42 superimposed on the outside of the protective cloth 41,
The upper and lower surfaces and the left and right surfaces of the airbag 5 are wrapped. According to this embodiment, it is possible to contribute to the reduction of the number of parts and the number of assembling steps. Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is a modification of the first and second embodiments, in which a protective cloth 41 and a deployment regulating cloth 42, which are formed as separate members, are integrated by a sewing portion 44. According to the present embodiment, the winding of the protective cloth 41 and the deployment regulating cloth 42 is easier than in the first embodiment, and it is possible to prevent forgetting to attach the deployment regulating cloth 42 and the second embodiment. Protective cloth 41 and deployment regulating cloth 42 as compared with the example
The yield of the material is improved. In addition, by preparing two types of members, that is, the protective cloth 41 and the deployment regulating cloth 42, it is easy to separately form a type provided with only the protective cloth 41 and a type provided with the protective cloth 41 and the deployment regulating cloth 42. be able to. Although the embodiments of the present invention have been described in detail above, various design changes can be made in the present invention without departing from the gist thereof. For example, in the embodiments, the side collision airbag device on the driver's seat side is illustrated, but the present invention can be applied to a passenger seat side collision airbag device. Although the lid 37 of the module case 4 of the embodiment is covered with the third covering material 24, an opening may be formed in the third covering material 24 in advance to expose the lid 37 directly to the side surface of the seat back 2. . As described above, according to the first aspect of the present invention, the airbag is moved up and down in the initial stage of inflation of the airbag.
And restricting expansion in the left-right direction,
Concentrates the energy of the high-pressure gas supplied from the
In order to deploy the airbag smoothly and, since covered upper and lower surfaces and an transverse dimension of the folded air bag in the strip of restrictor member, airbag vertical and when the high pressure gas flows into the airbag from the inflator The expansion restricting member restricts inflation in the left-right direction, so that the energy of the high-pressure gas can be concentrated forward and the airbag can be deployed smoothly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a seat provided with an airbag device for side collision. FIG. 2 is an enlarged cross-sectional view taken along line 2-2 of FIG. 1. FIG. 4 is a sectional view taken along line 4-4 in FIG. 2; FIG. 5 is a perspective view of an airbag, a protective cloth and a deployment regulating cloth; FIG. FIG. 8 is a perspective view of an airbag, a protective cloth, and a deployment regulating cloth according to a second embodiment of the present invention. FIG. 9 is a perspective view of a protective cloth and a deployment regulating cloth according to a third embodiment of the present invention. [Description of Signs] 2 Seat back 4 Module case 5 Airbag 32 Inflator 42 Deployment regulating cloth (deployment regulating member)

Continuation of front page (72) Inventor Yuichi Saito 1-4-1 Chuo, Wako-shi, Saitama Pref. Honda Technical Research Institute Co., Ltd. (56) References JP-A-2000-85520 (JP, A) JP-A-2000-95052 (JP) JP-A-9-193734 (JP, A) JP-A-10-6909 (JP, A) JP-A-11-59310 (JP, A) JP-A-7-215156 (JP, A) 11-78758 (JP, A) JP 2001-219808 (JP, A) JP 2000-135961 (JP, A) JP 2000-280854 (JP, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) B60R 21/22

Claims (1)

(57) [Claims] (1) A folded airbag (5) and this airbag (5)
Inflator capable of supplying high-pressure gas into bag (5)
(32) is placed on the side of the seat back (2) so that inflation can be prevented during a vehicle collision.
In a side collision airbag device, the module case (4) is opened by the pressure of an inflating airbag (5) supplied with high-pressure gas from the airbag (32) and the airbag (5) is deployed forward. When the airbag (5) is inflated at the initial stage of inflation,
By controlling expansion in the downward and left-right directions,
The energy of the gas is concentrated forward and the airbag (5)
The upper and lower surfaces and left and right surfaces of the folded airbag (5) are strip-shaped in order to smoothly deploy the airbag (5).
An airbag device for side collision, wherein the airbag device is covered by 2).