JP5685062B2 - Airbag device for passenger seat - Google Patents

Description

  The present invention relates to an airbag device for a passenger seat installed on the back side of an instrument panel in front of a passenger seat of an automobile.

  In recent years, there has been an increasing social and technical demand to reduce the weight of the entire vehicle. In other words, from the standpoint of social demand, it has been recognized as an important issue to suppress automobile exhaust gas due to the increasing momentum of global environmental protection, and it is most reasonable to improve fuel efficiency by reducing the weight of automobiles. From the idea that this is a simple solution, it is required to reduce the weight of all parts constituting the automobile, and the airbag device is also required to be lighter.

  Also, from the viewpoint of technical requirements, the number of places where airbag devices are installed has increased due to the spread of side airbags, curtain airbags, etc., and the influence of the mass of individual airbag devices is not so large. Even if it is not, the increase in the mass of the entire vehicle is a place that cannot be ignored due to the large number of mounting locations. Moreover, even if the number of installed airbag devices will increase for a considerable future, it is not considered to decrease, and therefore the need for technology for weight reduction is not small.

  On the other hand, miniaturization is another important issue in terms of technical requirements. Even in automobiles, so-called IT waves are coming in, and there is a demand for collecting operation and control functions on the instrument panel. However, even in a conventional vehicle, vehicle control relations, air conditioning equipment and its control relations, and audio-related equipment are in a state of being intertwined with each other, and an airbag device is also incorporated, which makes it extremely difficult to layout. In order to add IT equipment or the like to such an instrument panel, the size of the instrument panel is naturally limited by its function, and there is a need to make existing built-in equipment more compact.

  For this reason, in the airbag device for the passenger seat, development for reducing the weight without deteriorating the function of the airbag device is progressing. As a passenger airbag device for the purpose of reducing the weight, for example, a patent It is proposed in Document 1.

  The technique described in Patent Document 1 has been proposed as a vehicle airbag mounting structure, and is supported by a support member on the vehicle body side (instrument panel side) and has a mounting portion in which a mounting hole is formed. A housing for housing the bag together with the inflator, a cover that is disposed facing the passenger and has a hook that engages with a mounting hole of the housing, the mounting hole of the housing is reinforced with a belt, and the entire housing is made of textile ( This is a technology that comprises a base fabric.

  The conventional technology configured in this way is intended to reduce the impact of an occupant or the like and reduce the weight of the device by configuring the housing to store the airbag using a textile. It can be said that it is.

WO2007 / 04337.

  However, since the technique described in Patent Document 1 is configured to attach a housing that accommodates an airbag by engaging a hook formed in the cover with a mounting hole formed in the airbag, As a result, the mounting load is subjected to a shear load resulting from the weight of the belt, and it is necessary to reinforce the mounting hole with a belt, which may complicate the structure. In addition, the technique described in Patent Document 1 arranges an airbag on the upper side with respect to the automobile and arranges an inflator on the lower side when a housing for accommodating the airbag is mounted on the back side of the instrument. It is configured as follows. Therefore, the inflator that exists under the car is a hard object made of metal, so it interferes with other built-in equipment such as an air conditioner and a glove box equipped on the back side of the instrument panel, There is a risk that layout design on the back side of the instrument panel and the like may be difficult due to mutual installation space.

  Therefore, in view of the problems in the conventional technology, the present invention provides an inflator as a case body attachment means even if the case body (housing) for housing the airbag is configured by a base fabric to reduce the weight of the vehicle. By using this mounting structure, the structure is simplified and a solid mounting structure is achieved, and for the passenger seat, which reduces the influence on the layout design of built-in equipment such as air conditioners installed on the back side of the instrument panel An object is to provide an airbag device.

An airbag device for a passenger seat according to the present invention includes a case body including a folded airbag, an inflator for injecting high-pressure gas into the airbag at the time of a car collision, and a base fabric for accommodating the airbag. An air bag device for a passenger seat configured to be installed on the back side of an instrument panel of an automobile, wherein a base plate on which an inflator is mounted hangs downward with respect to the instrument panel and the automobile in a case body located in front of, and, on the side of the base plate and the mounting piece is provided for attachment to the instrument panel, and characterized in that installed the case body on the back side of Lee Nsu torr instrument panel by attachment piece To do.

  In the present invention having such a configuration, since the inflator is disposed so as to be positioned on the front side of the automobile in the case body, the attachment structure of the case body to the instrument panel is provided to the instrument panel. The case body can be firmly and simply attached, and the number of attachment parts can be reduced.

  Further, the present invention is arranged such that the inflator is disposed on the front side of the automobile in the case body, the case body containing the airbag is located below the instrument panel, and built-in equipment such as an air conditioner Although the case body facing these built-in devices is composed of a soft material composed of a base fabric together with the airbag, it can be said that it is flexible in shape. The devices can be arranged in close proximity, and restrictions on the layout design on the back side of the instrument panel can be reduced.

Further, in the passenger seat airbag device according to the present invention, as an embodiment of the above invention, one side of the mounting portion of the case body is attached to the base plate mounting piece for mounting the inflator mounted on the back side of the instrument panel. it can be configured which is attached by pinched at the back side of the instrument panel.

  With the configuration according to such an embodiment, the case body is attached by being sandwiched between the base plate of the inflator attached to the back side of the instrument panel and the back side of the instrument panel. Therefore, the case body mounting structure can be firmly and simplified without causing a shear load as in the conventional mounting hole.

  In this invention, since the inflator is disposed so as to be positioned on the front side of the automobile in the case body, it is possible to use the attachment structure of the inflator to the instrument panel for attaching the case body to the instrument panel. In addition, the attachment of the case body can be firmly and simplified, and the number of attachment parts can be reduced.

    Further, the present invention is arranged such that the inflator is disposed on the front side of the automobile in the case body, the case body containing the airbag is located below the instrument panel, and built-in equipment such as an air conditioner Although the case body facing these built-in devices is composed of a soft material composed of a base fabric together with the airbag, it can be said that it is flexible in shape. The devices can be arranged in close proximity, and restrictions on the layout design on the back side of the instrument panel can be reduced.

It is a schematic perspective view of an instrument panel when a passenger seat airbag device in a general automobile is mounted on the instrument panel. FIG. 2 is a cross-sectional view of main parts taken along line AA of FIG. 1 according to one embodiment of the present invention. It is a disassembled perspective view of the airbag apparatus for passenger seats in FIG. 1 which concerns on the Example of the position which concerns on this invention. FIG. 4 is a cross-sectional view of a main part taken along line AA in FIG. 1 according to another embodiment of the present invention.

  The airbag device for a passenger seat according to the present invention uses an inflator mounting structure as a mounting means for the case body even if the case body for housing the airbag is configured by a base fabric to reduce the weight of the vehicle. As a result, the structure is simplified and a firm mounting structure is achieved, and the influence on the installation layout design of an air conditioner or the like disposed on the back side of the instrument panel is reduced.

  Next, one embodiment of a passenger seat airbag apparatus according to the present invention will be described with reference to the drawings.

  First, in FIG. 1, an instrument panel 1 of an automobile is disposed in front of a passenger compartment, and is provided with a built-in device such as an air conditioner 1a, a glove box 1b, or an audio device 1c. Further, the instrument panel 1 is integrally formed at a portion corresponding to the front of the passenger seat with an airbag opening / closing lid 2 surrounded by a thin tear line 2a. Then, on the back side of the instrument panel 1 facing the airbag opening / closing lid 2, a passenger seat airbag device 3 is mounted as shown in FIG.

As shown in FIGS. 2 and 3, the passenger airbag device 3 includes a folded airbag 4, an inflator 5 for injecting high-pressure gas into the airbag 4 when a vehicle collides, and an airbag. A case body 6 made of a base fabric that accommodates the bag 4 is modularized.

The inflator 5 is filled with a medicine that generates a high-pressure gas, has a gas outlet 5 a on one end side, and is attached to the base plate 7. The base plate 7 has a base portion 7-1 that hangs downward with respect to the instrument panel 1 by being formed in an L shape, for example, and the instrument panel 1 is attached to one side of the base portion 7-1. A mounting piece portion 7a for mounting is provided .

  The base portion 7-1 of the base plate 7 is formed with a circular hole 7-1a for inserting and projecting the gas outlet 5a of the inflator 5 at the center thereof, and surrounds the circular hole 7-1a. Thus, a plurality of airbag attachment holes 7-1b are formed. Accordingly, the base body portion 7-1 is sandwiched between the retainer 8 in a state where the gas ejection port portion 5a is inserted into the gas inlet 4a formed on the front side of the automobile in the airbag 4, so that the airbag 4 Will be mounted (see FIG. 2).

  The case body 6 that accommodates the airbag 4 is formed by molding a base fabric into, for example, a ship bottom shape, and is elongated in the left-right direction of the automobile. Case body mounting pieces 6c, 6d are formed by extending the base fabric and overlapping the base fabric on the front longitudinal side 6a and the rear longitudinal side 6b with respect to the automobile of the case body 6 facing each other. Are formed respectively. The case body mounting piece 6c located on the front side of the automobile is formed at a relatively short side in the substantially central part of the front long side part 6a, whereas the case body mounting piece 6c located on the rear side of the automobile. The piece 6d is formed over the entire length of the rear longitudinal side 6b. A plurality of case body mounting holes 6e and 6f are formed in the case body mounting pieces 6c and 6d, respectively. In addition, you may make it form the case body attachment piece part similar to the case body attachment piece parts 6c and 6d in the both short side part 6g side of the case body 6. FIG.

Further, the case body 6 is formed with an insertion hole 6h through which the gas injection port 5a of the inflator 5 protruding from the circular hole 7-1a of the base plate 7 is inserted into the gas introduction port 4a of the airbag 4, and the insertion hole A plurality of airbag attachment holes 6i are formed so as to surround and surround 6h. As a result, the airbag 4, the gas inlet port 4a around along with the peripheral edge of the insertion hole 6h of the case body 6, in a state of being engaged more clamping to the base plate 7 and the retainer 8, a fastener 13 constructed from bolts and nuts Installed using.

  The instrument panel 1 is provided with a pair of mounting brackets 9 and 9, for example, in the form of Hiragana, which is formed by insert molding, in order to attach the airbag device 3 for the passenger seat on the back side thereof, In each of the mounting brackets 9 and 9, mounting bolts 10 and 10 which are similarly insert-molded are planted in a state where the heads 10a thereof are embedded in the instrument panel 1. The threaded portions 10b of the mounting bolts 10 and 10 extend from the mounting brackets 9 and 9 so as to face downward of the automobile.

Then, in the mounting bracket 9 on the front side of the automobile among the pair of mounting brackets 9, 9, the screw portion 10 b of the mounting bolt 10 is inserted into the mounting hole 7 a-1 formed in the mounting piece portion 7 a of the base plate 7. In this state, the base plate 7 is mounted on the back side of the instrument panel 1 by screwing the nut 11. At this time, the attachment piece 6c of the case body 6 is sandwiched between the attachment piece 7a of the base plate 7 and the attachment bracket 9 with the screw 10b of the attachment bolt 10 inserted through the case attachment hole 6e. I wear it.

  Further, in the mounting bracket 9 on the rear side of the automobile, the nut 13 is screwed in a state where the screw portion of the mounting bolt 10 is inserted into the mounting hole 12 a formed in the reinforcing portion 12, thereby reinforcing the piece. 12 is mounted on the back side of the instrument panel 1. At this time, the case body attaching piece 6d existing on the rear side of the automobile is sandwiched between the reinforcing piece 12 and the instrument panel 1.

  The passenger seat airbag device 3 according to the first embodiment configured as described above has the inflator 5 disposed on the front side of the automobile in the case body 6, and therefore the instrument panel of the case body 6. The base plate 7 as a structure for mounting the inflator 5 to the instrument panel 1 can be used for mounting to the instrument panel 1, so that the mounting of the case body 6 can be firmly and simplified, and the number of mounting parts can be reduced. it can.

  Further, in the passenger seat airbag device 3 according to the first embodiment, the inflator 5 is disposed so as to be positioned on the front side of the automobile in the case body 6, and the case body 6 containing the airbag 4 is an instrument. Located below the panel 1 and faces the built-in equipment such as the air conditioner 1a, the case body 6 facing the built-in equipment is composed of the soft cloth composed of the base fabric together with the airbag 4. Therefore, it can be said that it is flexible in shape, and can be arranged in close proximity to the built-in equipment such as the air conditioner 1a, thereby reducing restrictions on the layout design on the back side of the instrument panel 1. Can do.

  Further, in the passenger seat airbag device 3 according to the first embodiment, the case body 6 is provided with the base plate 7 and the instrument of the inflator 5 in which the attachment piece 7a, which is the attachment portion thereof, is attached to the back side of the instrument panel 1. The attachment structure of the case body 6 is firmly and simplified without causing a shear load as in the conventional attachment hole because it is attached by being attached to the back surface side of the ment panel 1. And the number of attachment parts can be reduced.

  Next, another embodiment according to the present invention will be described with reference to FIG. In another embodiment of the present invention shown in FIG. 4, the instrument panel 1 is configured as a seamless instrument panel in which an outer panel 1a and an inner panel 1b are bonded together with an intermediate panel 1c interposed therebetween. As a result, the mounting brackets 9 and 9 are insert-molded together with the mounting bolts 10 and 10 into the inner panel 1b. On the back side of the outer panel 1a, the tear line 2a of the inner panel 1b and Similarly, a tear line 2b is formed. Since other configurations adopt the same configuration as that of the above-described one embodiment, the same reference numerals are attached to the drawings, and detailed description thereof is omitted.

  As described above, according to the present invention, since the inflator is disposed so as to be positioned on the front side of the automobile in the case body, the attachment of the case body to the instrument panel is attached to the instrument panel of the inflator. The structure can be utilized, and the attachment of the case body can be firmly and simplified, and the number of attachment parts can be reduced.

  Further, the present invention is arranged such that the inflator is disposed on the front side of the automobile in the case body, the case body containing the airbag is located below the instrument panel, and built-in equipment such as an air conditioner Although the case body facing these built-in devices is composed of a soft material composed of a base fabric together with the airbag, it can be said that it is flexible in shape. The devices can be arranged in close proximity, and restrictions on the layout design on the back side of the instrument panel can be reduced.

  Therefore, it can be said that the present invention is suitable for an airbag device for a passenger seat installed on the back side of an instrument panel in front of the passenger seat of an automobile.

DESCRIPTION OF SYMBOLS 1 Instrument panel 2 Opening-closing lid for airbag 3 Airbag apparatus for passenger seats 4 Airbag 5 Inflator 6 Case body
6a Mounting piece
6d, 6e Case body mounting part
6f 6g Case body mounting hole 7 Base plate 8 Retainer

Claims (2)

A back side of an instrument panel of the automobile, comprising a folded airbag, an inflator for injecting high-pressure gas into the airbag at the time of a collision of the automobile, and a case body made of a base fabric for housing the airbag An airbag device for a passenger seat configured to be installed in a vehicle, wherein a base plate on which the inflator is mounted hangs downward with respect to the instrument panel and is positioned on a front side of the automobile in the case body. An attachment piece for attachment to the instrument panel is provided on one side of the base plate, and the case body is installed on the back side of the instrument panel by the attachment piece. Air bag device. One side of the mounting portion of the case body, is attached by pinched at the back side of the mounting piece portion of said base plate for mounting the inflator mounted on the back side of the instrument panel and the instrument panel The airbag device for a passenger seat according to claim 1, wherein the airbag device is a passenger seat.

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