JP2009154669A - Cover body for airbag device and airbag device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To guide a deployment direction of an airbag and reduce manufacturing cost of an airbag device for a passenger seat. <P>SOLUTION: This airbag device 1 is provided at an instrument panel 3 below a front glass of an automobile. A cover body 11 includes a surface plate portion 21 along the instrument panel 3 and a leg piece portion 22 protruding from a back face side of the surface plate portion 21. The surface plate portion 21 and the leg piece part 22 are integrally formed by resin. A top end portion of the leg piece part 22 is engaged with a case body 14 for fixing. A slant plate portion 40 is formed at a position abutted on the surface plate portion 21 of the leg piece portion 22. The deploying airbag 16 is guided to the passenger side by the slant plate portion 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to, for example, a cover body and an airbag device of an airbag device for a passenger in a passenger seat of an automobile.

  2. Description of the Related Art Conventionally, an airbag device for a passenger in a passenger seat disposed on an instrument panel of an automobile is known. The airbag device includes a box-shaped case body, and a folded airbag and an inflator for injecting a gas for inflating the airbag are housed inside the case body. The upper opening is covered with a cover body. And this cover body is provided with the plate-shaped surface plate part attached along an instrument panel, and the leg piece part projected on the back surface side of this surface plate part. A tearable tear line such as a substantially plane H shape or a plane C shape is formed on the front plate portion, and a portion surrounded by the tear line is partitioned and formed as a planned door portion. The part which is not formed is a hinge part which can be bent. In addition, the leg piece portion is integrally projected from the back side of the front plate portion along the outer peripheral side of the planned door portion of the cover body, that is, along the outer peripheral side of the tear line and the hinge portion, and is attached to the case body or the like. It has been.

  In the event of a car collision, the air bag is inflated by injecting gas from the inflator, the tear line is broken to form the door part, and the door part is developed with the hinge part as a fulcrum to form a protruding port. The airbag is projected from the projecting opening and inflated and deployed in front of the occupant, so as to alleviate the impact applied to the occupant.

  For such a cover body, depending on the shape of the instrument panel and the state of the members in the instrument panel, the case body is arranged so that the opening faces directly above, and the airbag protruding upward is aligned with the windshield. The structure which guides to the back passenger side is known.

In this regard, a configuration is known in which a film-shaped protective cover is housed inside the case body, one end of the protective cover is connected to the planned door portion of the cover body, and the other end is connected to the case body (for example, (See Patent Document 1). In this configuration, when the airbag is deployed, the end of the protective cover on the case body side is broken, and the protective cover positioned between the windshield and the airbag is used as a cushioning material to reduce the impact on the windshield. .
JP-A-8-258654 (FIG. 1-2)

  As in the conventional case, the structure in which the airbag is guided by a separate member such as a film-shaped protective cover has a problem that the structure becomes complicated, the manufacturing cost increases, and the weight reduction becomes difficult. .

  The present invention has been made in view of the above points, and provides a cover body of an airbag device and an airbag device capable of guiding the deployment direction of the airbag while simplifying the structure and reducing the manufacturing cost. Objective.

  The cover body of the airbag device according to claim 1 includes a front plate portion that covers a front side of the stored airbag and has a door planned portion that is deployed when the airbag is inflated, and a rear surface of the front plate portion. A leg projecting from the side and attached to a member to be attached, and a leg positioned between the attachment part and the front plate part, facing the stored airbag and inclined with respect to the attachment part One part.

  In this configuration, when the airbag is deployed, the inclined portion of the cover body guides the airbag, and the airbag is deployed in a desired direction from the initial deployment. Since the inclined portion is provided on the leg side portion of the cover body, the configuration is simplified and the manufacturing cost is reduced. Since the inclined portion is inclined with respect to the attachment portion, the airbag is guided in a desired direction regardless of the restriction of the direction of the attachment portion attached to the attached member.

  The cover body of the airbag device according to claim 2 is the cover body of the airbag device according to claim 1, wherein the front plate portion and the leg piece portion are integrally formed of resin, and the inclined portion is It is formed along the part in contact with the plate part.

  And in this structure, since a front-plate part and a leg piece part are integrally formed with resin, manufacturing cost is reduced. Since the inclined portion is formed along the portion in contact with the front plate portion, the airbag can be smoothly deployed from the portion where the planned door portion of the front plate portion is deployed.

  The airbag device according to claim 3 is an airbag device provided in an instrument panel portion of a vehicle, and includes a case body constituting an attached member having an opening on the front side, and the case body. The air bag, the inflator for supplying gas to the air bag, and the air bag in which the front plate portion is accommodated, the attachment portion is attached to the case body, and the inclined portion is provided on the front side of the opening portion. The cover body according to claim 1, wherein the cover body protrudes in part.

  And in this structure, since the cover body of Claim 1 or 2 was provided, the expansion | deployment direction of an airbag is guided, simplifying a structure and reducing manufacturing cost.

  According to the present invention, it is possible to guide the airbag deployment direction while simplifying the structure and reducing the manufacturing cost.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of a cover body of an airbag device and an airbag device according to the invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 1 denotes an airbag device. The airbag device 1 is provided in an instrument panel 3 in a vehicle interior of a car as a moving body, and protects an occupant as a protection target seated in a passenger seat. An airbag device 1 for a passenger in a passenger seat, which is also called an assist airbag or the like, is configured. In other words, the instrument panel 3 is located in front of the passenger seat, and is disposed in the front part of the passenger compartment with the two sides being the vehicle width direction as the longitudinal direction. A windshield (not shown) as a windshield is located above the instrument panel 3. That is, the airbag device 1 is disposed so as to face the lower side of the windshield.

  The airbag device 1 includes a cover body 11 provided in a square opening provided in the instrument panel 3 and an airbag module disposed on the back side of the cover body 11. The bag module includes a case body 14 constituting a member to be attached, an airbag 16 attached to the case body 14, a retainer (not shown), an inflator 18, a bracket, and the like. In addition, the airbag device 1 includes a control unit and a sensor that are connected to the inflator 18 via a harness.

  The airbag device 1 is normally attached to the curved instrument panel 3 while being inclined in an appropriate direction from the upper side to the rear side. Description will be made assuming that the front side (arrow F direction), the rear side is the occupant side (arrow B direction), the vehicle width direction is the both-side direction, and the center direction of deployment of the airbag 16 is the front side (arrow A direction).

  The case body 14 is also called a base or the like and is a member to which the cover body 11 is attached. The case body 14 is formed in a substantially box shape with the opening 14a on the upper side by pressing a metal plate or the like. That is, the case body 14 includes a case bottom plate portion 14b, a case side plate portion (not shown) that is vertically raised from the edge portions on both sides of the case bottom plate portion 14b, and a front and rear edge portions of the case bottom plate portion 14b. It is provided with a case front plate 14c and a case rear plate 14d as a case end plate raised up vertically, and includes a case bottom plate 14b, a case side plate, a case front plate 14c and a case. A portion surrounded by the rear end plate portion 14d is an airbag storage portion. A plurality of hooks 14e are fixed to the outer surfaces of the case front end plate portion 14c and the case rear end plate portion 14d of the case body 14 by welding or the like. The case body 14 is fixed at a predetermined angle to a member constituting the vehicle body via a bracket (not shown) so as to avoid other members arranged in the instrument panel 3.

  The airbag 16 is formed into a bag shape by stitching the base fabric, etc., and is stored in the airbag storage portion in the case body 14 in a folded state, and the opening 16a is directed downward. The periphery of the opening 16a is fixed to the case body 14 using a retainer.

  Further, the inflator 18 has a substantially spherical shape and is fixed to the bottom plate portion 14b of the case body 14. The inflator 18 supplies gas into the airbag 16 from the gas injection port 18b provided on the upper side by burning the stored medicine or compressing and storing the stored gas.

  Further, the cover body 11 is also called a lid (LID), and a resin material is introduced into a mold, that is, formed integrally with a resin. As shown in FIG. 1 and FIG. A front plate portion 21 that is disposed flush with the outside and is exposed to the outside, and a leg piece portion 22 that protrudes on the back surface side that is the back surface side of the front plate portion 21 are provided. And, the front plate portion 21 can be called a covering portion, has a flat shape or a gently curved shape, is a tear line 24 that is a planned fracture portion that easily breaks from other portions, and other portions as necessary. A pair of front and rear door planned portions 27 and a frame portion 28 surrounding the door planned portions 27 are partitioned by front and rear hinge portions 25 formed so as to be easily bent. The frame portion 28 and the leg piece portion 22 constitute a non-deployed portion 29.

  The tear line 24 is formed by cutting the back side of the front plate portion 21 into a concave groove shape, and the like. The first tear line 24a extends in both directions, and the second tear line extends from both ends of the first tear line 24a. It is formed in a substantially plane H shape including a tear line 24b and a regulation tear line 24c provided in a substantially U shape so as to fold back the front and rear ends of the second tear line 24b. In addition, the hinge portion 25 is formed with the both side directions as the longitudinal direction between the regulation tear lines 24c opposed to both sides, for example, by recessing the back side of the front plate portion 21. In this way, a pair of front and rear door planned portions 27 having a substantially rectangular plane shape and a square frame-shaped frame portion 28 surrounding these door planned portions 27 are formed.

  Further, the leg piece portion 22 can be called an attachment piece portion or a vertical wall. The leg piece portion 22 is formed along the inner peripheral portion of the frame portion 28, that is, along the outer peripheral side of the second tear line 24b and the hinge portion 25. The plate portion 21 protrudes from the back surface side of the frame portion 28 in a substantially rectangular tube shape. That is, the leg piece 22 includes a plate-like side plate portion 31 located on both sides, and a front end plate portion 32 and a rear end plate portion 33 which are end plate portions located on the front and rear sides, here on the windshield side and on the passenger side. I have. The side plate portions 31 on both sides and the mounting plate portion 36 as the mounting portion which is the back side of the front and rear end plate portions 32, 33, that is, the tip side portion, have a flat plate shape, and the front plate portion 21 It is arranged substantially perpendicular to the plane formed by the planned door portion 27. Further, the mounting plate portions 36 of the front and rear end plate portions 32 and 33 are each formed with a plurality of mounting holes 37 that are rectangular openings.

  The so-called vertical portion of the vertical wall on the front side of the front and rear end plate portions 32 and 33 of the leg piece 22, that is, the joint where the front and rear end plate portions 32 and 33 are in contact with the front plate portion 21, respectively, An inclined plate portion 40 and a rear inclined plate portion 41 as inclined portions inclined toward the vehicle rear side, that is, toward the occupant side. The inclined plate portion 40 and the rear inclined plate portion 41 are formed in parallel with each other while forming a flat plate shape inclined with respect to the flat surface formed by the planned door portion 27 of the front plate portion 21 and the mounting plate portion 36. .

  Further, a plurality of triangular plate-like reinforcing ribs that integrally connect the frame portion 28 and the leg piece portion 22 of the front plate portion 21 are formed at a predetermined interval on the back surface side of the cover body 11 as necessary. The

  The cover body 11 is formed in the case body in the attachment hole 37 in a state where the side plate portion 31 of the leg piece portion 22 and the attachment plate portions 36 of the front and rear end plate portions 32 and 33 are fitted to the outer peripheral portion of the case body 14. 14 hooks 14e are locked and attached to the case body 14, and the top portion of the airbag housing portion, that is, the folded airbag 16 is covered by the portion of the door portion 27 of the front plate portion 21, and the instrument panel 3 is covered. It is positioned and arranged so that the surface side of the instrument panel 3 and the surface side of the cover body 11 are flush with each other, that is, smoothly.

  Further, in this state, a part of the inclined plate portion 40 on the front side of the leg piece portion 22 of the cover body 11 protrudes above the opening 14a of the case body 14, and the inner surface side of the inclined plate portion 40 is stored as an inclined surface. It faces the airbag 16.

  Therefore, when an automobile equipped with the airbag device 1 collides, the control means activates the inflator 18 based on the impact detected by the sensor, and the airbag 16 is inflated by the gas supplied from the inflator 18. The tear line 24 of the cover body 11 is broken by the bulging pressure. Normally, the tear line 24 is such that the first tear line 24a breaks from the center, and then the second tear lines 24b on both sides break, and the progress of these breaks is stopped by the regulated tear line 24c. Then, the front and rear doors 47 shown by the two-dot chain line in FIG. 1 are formed from the planned door 27, and the door 47 is developed forward and backward with the hinge 25 as a fulcrum to form a protrusion. The airbag 16 is deployed.

  When the airbag 16 is deployed, the airbag 16 is operated, that is, guided to the rear occupant side by contacting the so-called inclined wall of the inclined plate portion 40 on the front side of the leg piece portion 22 of the cover body 11. In the direction indicated by the arrow C in FIG. 1, the vehicle is inflated and deployed forward of the occupant with a preferable initial behavior. The airbag 16 inflated and deployed in this way can quickly restrain and protect the occupant thrown forward.

  Thus, according to the present embodiment, since the inclined plate portion 40 that is inclined toward the deployment direction of the airbag 16 is provided on the leg piece portion 22 of the cover body 11, when the airbag 16 is deployed, the cover body Eleven inclined plate portions 40 guide the airbag 16, and the airbag 16 can be guided and deployed in a desired direction from the beginning of deployment to effectively protect the occupant with favorable behavior. That is, since the airbag 16 heads toward the occupant side from the initial deployment, the occupant can be protected quickly.

  Further, since the airbag 16 is deployed in a direction deviating from the direction in contact with the windshield, the influence of the airbag 16 on the windshield can be suppressed, and the airbag 16 is disposed to face the lower side of the windshield such as the windshield. Characteristics suitable for the airbag device 1 can be easily realized.

  Further, since the inclined plate portion 40 is formed along the portion in contact with the front plate portion 21, the airbag 16 can be smoothly deployed through the opening portion where the planned door portion 27 is deployed as the door portion 47.

  Further, since the rear inclined plate portion 41 is provided in parallel to the front inclined plate portion 40, the airbag 16 can be smoothly deployed without reducing the opening area through which the deployed airbag 16 passes.

  Since the inclined plate portion 40 is integrally formed with the leg piece portion 22 formed integrally with the front plate portion 21 and the resin of the cover body 11, it is a separate component such as a flap shape for guiding the airbag 16. Compared to the configuration using the, the configuration can be simplified, the number of parts and the number of assembly steps can be reduced, and the reduction in manufacturing cost and weight can be easily realized. Further, as compared with a configuration in which the deployment direction of the airbag 16 is restricted by devising the folded shape of the airbag 16, a complicated folding process can be simplified and the manufacturing cost can be reduced.

  Further, since the inclined plate portion 40 is inclined with respect to the plane formed by the planned door portion 27 of the front plate portion 21, the front plate portion 21, that is, the instrument panel 3 is controlled while restricting the deployment direction of the airbag 16 to a preferable direction. The degree of freedom of the shape can be increased and the appearance can be improved.

  Further, since the inclined plate portion 40 is inclined with respect to the mounting plate portion 36 fitted and attached to the case body 14, the shape and arrangement of the case body 14 are regulated while restricting the deployment direction of the airbag 16 to a preferable direction. The degree of freedom can be improved, and the airbag device 1 can be easily arranged inside the instrument panel 3 on which a large number of members are arranged.

  In addition, the inclined plate portion 40 and the rear inclined plate portion 41 are formed in the same plate shape as the mounting plate portion 36, thereby forming a portion where the thickness of the resin is increased on the back side of the front plate portion 21. Therefore, the appearance can be improved by suppressing the occurrence of so-called sinks accompanying the shrinkage of the resin.

  In the above embodiment, the inclined plate portion 40 and the rear inclined plate portion 41 are formed in a flat plate shape, but are not limited to this configuration, and the inclined plate portion 40 or the inclined plate portion 40 and the rear inclined plate portion 41 Can also be a smooth curved surface such as a bow.

  In the above-described embodiment, the front plate portion 21 of the cover body 11 has been described as having a configuration including a pair of front and rear door planned portions 27 partitioned by a plane H-shaped tear line 24. However, the present invention is not limited to this configuration. For example, it can also be set as the structure provided with the one door scheduled part divided by the substantially C-shaped tear line. Further, the tear line 24 may not be broken depending on the state of development in addition to the case where the tear line 24 is broken over the entire length.

  Further, the airbag device 1 provided with the cover body 11 is used as a cover body for an airbag device installed at an appropriate position such as an automobile or other moving body in addition to the passenger seat passenger provided in the instrument panel 3. Applicable. For example, the present invention can be applied to an airbag device that is arranged behind a rear seat and facing a rear glass that is a windshield.

  The present invention can be applied to, for example, a cover body of an airbag device for a passenger on a passenger seat provided in an instrument panel of an automobile.

It is explanatory drawing which shows one Embodiment of the airbag apparatus of this invention. It is a perspective view of the cover body of an airbag apparatus same as the above.

Explanation of symbols

1 Airbag device 3 Instrument panel
11 Cover body
14 Case body constituting the mounted member
14a opening
16 airbag
18 Inflator
21 Front plate
22 Leg piece
27 Door planned part
36 Mounting plate as mounting part
40 Inclined plate as an inclined part

Claims (3)

A front plate portion that covers the front side of the stored airbag and has a door planned portion that is deployed when the airbag is inflated;
Projecting from the back side of the front plate portion, mounted on the attached member, and positioned between the mounting portion and the front plate portion, facing the stored airbag and inclined with respect to the mounting portion A cover body for an airbag device, comprising: a leg piece portion provided with an inclined portion. The cover of the airbag device according to claim 1, wherein the front plate portion and the leg piece portion are integrally formed of resin, and the inclined portion is formed along a portion in contact with the front plate portion. body. An airbag device provided in an instrument panel portion of a vehicle,
A case body constituting a mounted member having an opening on the front side;
An airbag stored in the case body;
An inflator for supplying gas to the airbag;
3. The cover body according to claim 1, wherein the cover body covers the airbag in which the front plate portion is accommodated, the attachment portion is attached to the case body, and the inclined portion protrudes from a part of the front side of the opening portion. An airbag apparatus comprising:

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