JP2009298268A - Hinge structure of airbag lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge structure of an airbag lid for reliably and rapidly cleaving a lid part of the airbag device. <P>SOLUTION: The hinge structure of the airbag lid has a hinge member 10 which is pressed from the back side as an airbag 4 is inflated when a vehicular airbag device 2 is operated and turnably supports a lid part 3 to be cleaved from a groove part 3a by a peripheral part 1b. The hinge member 10 are integrated with fixed parts 11 to be fixed to each back side of the peripheral parts 1b, 1b, a movable part 12 to be fixed to the back side of the lid part 3, and a flexible hinge part 13 to turnably connect the movable part 12 to the fixed part 11. A translational motion preventive frame 14 for preventing the translational motion of the movable part 12 in the cabin direction due to the deflection of the hinge part 13 when being pressed by the airbag 4 is interposed between the lid part 3, the peripheral part 1b and the hinge member 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention supports a lid part that is pressed from the back side by the airbag and that is torn from the center as the airbag is in operation when the vehicle airbag device is operated, so that the lid part can be pivoted to the peripheral parts on both sides of the lid part. The present invention relates to an improved invention for a hinge structure of an air bag grid.

  Conventionally, the lid portion that is pressed from the back side by the airbag and is torn from the center portion as the airbag is in operation when the vehicle airbag device is operated is rotatably supported on the peripheral portions on both sides of the lid portion. A hinge structure of an air bag grid is known (for example, see Patent Document 1).

  In recent years, automobile vehicles have been equipped with airbag devices in order to ensure the safety of passengers in the event of a collision.

  The air bag device instantly inflates the air bag when an impact of a predetermined level or more is applied to the vehicle, and cushions the inflated air bag to reduce the shock to the head of the occupant. This device protects passengers from the impact of accidents.

  In FIG. 1A, reference numeral 1 denotes an instrument panel of a vehicle, and a passenger seat airbag device 2 according to the conventional example is built in a front passenger seat portion of the instrument panel 1.

  A lid portion 3 of the airbag device 2 is integrally formed on the resin surface panel 1 a of the instrument panel 1, and the lid portion 3 constitutes a part of the airbag device 2.

  As shown in FIG. 1B, the airbag device 2 includes an airbag 4 and an inflator unit 5 that inflates the airbag 4. The airbag 4 and the inflator unit 5 are accommodated in a case 6. ing.

  Hooks 7 and 7 are provided on the upper part of the case 6, and the lower part of the case 6 is attached to a steering support member 9 fixed to the vehicle via a joining member 8.

  As shown in FIG. 1C, a groove 3 a is formed at the center of the back side of the lid portion 3, and the groove 3 a is thinner than the other portions of the lid portion 3. When the airbag device 2 is operated, the lid portion 3 is pressed from the back side with the expansion of the airbag 4 and is torn from the groove portion 3a.

  A pair of resin hinge members 10 and 10 according to this conventional example are provided on the back surface side of the lid portion 3 and the back surface sides of the peripheral portions 1b and 1b located on both sides of the lid portion 3 with the groove 3a interposed therebetween. It has been.

  The hinge member 10 is made of resin, and as shown in FIG. 1C, the hinge member 10 is a flexible member that rotatably connects the fixed portion 11, the movable portion 12, and the movable portion 12 and the fixed portion 11. The hinge part 13 is integrally formed.

  The fixing part 11 has a panel fixing part 11A and a device holding part 11B. The panel fixing part 11A is fused to the back surface side of the peripheral part 1b via a plurality of rib parts R formed on the panel fixing part 11A. The movable portion 12 is fixed and fused to the back side of the lid portion 3 via a plurality of rib portions R formed on the movable portion 12.

  As shown in FIG. 1B, the device holding portion 11B is formed with an engagement hole 11Ba, and the engagement holes 11Ba, 11Ba of the hinge members 10, 10 are respectively connected to the hook portion 7, 7 are engaged with each other.

  In the hinge structure of the airbag grid of the conventional example, the lid portion 3 is rotatably supported by the peripheral portions 1b and 1b on both sides of the lid portion 3 by the hinge members 10 and 10.

  The hinge member 10 compensates for the rotation of the lid portion 3 around the groove portion 3b and reinforces the periphery of the groove portion 3b of the lid portion 3 during the operation of the airbag device 2, thereby preventing the lid portion 3 from cleaving from the groove portion 3b. It is preventing.

When the vehicle airbag device 2 is operated, as shown in FIG. 2A, the lid portion 3 is pressed from the back side by the airbag 4 and is split from the groove portion 3a as the airbag 4 is inflated. The inflated airbag 4 bulges out to the passenger seat from between the cleaved lid portions 3 and 3.
JP 2008-62907 A

  However, in the hinge structure of the airbag grid of the conventional example, the hinge part 13 of the hinge member 10 has flexibility, so that the movable part 12 has a degree of freedom of translational movement to some extent. In the expansion process, as shown in FIG. 2 (b) or FIG. 2 (c), the lid portion 3 and the movable portion 12 fixed to the back side of the lid portion 3 are almost rotated without the lid portion 3 being cleaved. There may be a translational movement toward the passenger compartment without moving.

  In this case, since the force for bending the groove portion 3a of the lid portion 3 is weakened, the lid portion 3 may not be cleaved, or even if the lid portion 3 is cleaved, there is a possibility that a slight time delay occurs in the cleaving of the lid portion 3.

  Such a time delay of the lid portion 3 tearing becomes a problem for the airbag device 2 that instantly inflates the airbag 4 in the event of a collision even if the delay is slight.

  Accordingly, an object of the present invention is to provide an airbag grid hinge structure that can reliably and quickly cleave the lid portion of the airbag apparatus.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a lid portion that is pressed from the back side by the airbag and cleaved from the center portion when the airbag is inflated when the vehicle airbag device is operated. A hinge structure of an airbag grid for pivotally supporting the peripheral part on both sides of the lid part, and a fixed part fixed to the back side of the peripheral part of the lid part, and fixed to the back side of the lid part A hinge member that integrally includes a movable part and a flexible hinge part that rotatably connects the movable part and the fixed part is provided, and the hinge part is bent by being pressed by the airbag. A hinge structure of an air bag grid in which a translational motion preventing body for preventing translational motion of the movable part in the direction of the passenger compartment is interposed between the lid part and the peripheral part of the lid part and the hinge member. It is characterized.

  According to the first aspect of the present invention configured as described above, the translational motion preventing body for preventing the translational motion of the movable portion in the direction of the passenger compartment due to the flexure of the hinge portion when the airbag is pressed includes the lid portion and Since the lid portion is inserted between the peripheral portion of the lid portion and the hinge member, translational movement of the lid portion and the movable portion toward the passenger compartment is prevented during operation of the airbag device, and the lid portion and the movable portion are smooth. The lid portion of the airbag device can be reliably and quickly cleaved.

  The present invention will be described based on examples of embodiments according to the present invention.

<Constitution>
In FIG. 3A, reference numeral 1 denotes an instrument panel of a vehicle, and a passenger seat airbag device 2 according to the present embodiment is built in a front passenger seat portion of the instrument panel 1.

  A lid portion 3 of the airbag device 2 is integrally formed on the resin surface panel 1 a of the instrument panel 1, and the lid portion 3 constitutes a part of the airbag device 2.

  As shown in FIG. 3B, the airbag device 2 includes an airbag 4 and an inflator unit 5 that inflates the airbag 4, and the airbag 4 and the inflator unit 5 are accommodated in a case 6. ing.

  As shown in FIG. 3 (c), a groove 3 a is formed at the center position on the back side of the lid portion 3, and the groove 3 a is thinner than the other portions of the lid portion 3. When the airbag device 2 is operated, the lid portion 3 is pressed from the back side with the expansion of the airbag 4 and is torn from the groove portion 3a.

  Hooks 7 and 7 are provided on the upper part of the case 6, and the lower part of the case 6 is attached to a steering support member 9 fixed to the vehicle via a joining member 8.

  As shown in FIG. 3 (c), a groove 3 a is formed at the center position on the back side of the lid portion 3, and the groove 3 a is thinner than the other portions of the lid portion 3. When the airbag device 2 is operated, the lid portion 3 is pressed from the back side with the expansion of the airbag 4 and is torn from the groove portion 3a.

  A pair of resin hinge members 10 'and 10' according to the present embodiment are provided on the back surface side of the lid portion 3 and the back surfaces of the peripheral portions 1b and 1b located on both sides of the lid portion 3 with the groove 3a interposed therebetween. Is provided.

  The hinge member 10 ′ is formed of resin, and as shown in FIG. 3C, the flexible part 11, the movable part 12, and the flexible part that rotatably connects the movable part 12 and the fixed part 11. The hinge portion 13 is integrally formed.

  The fixing part 11 has a panel fixing part 11A and a device holding part 11B. The panel fixing part 11A is fused to the back surface side of the peripheral part 1b via a plurality of rib parts R formed on the panel fixing part 11A. The movable portion 12 is fixed and fused to the back side of the lid portion 3 via a plurality of rib portions R formed on the movable portion 12.

  As shown in FIG. 3B, the device holding portion 11B is formed with an engagement hole 11Ba, and the engagement holes 11Ba and 11Ba of the hinge members 10 ′ and 10 ′ are provided with hook portions of the case 6. 7 and 7 are respectively engaged.

  In the hinge structure of the airbag grid of this embodiment, the lid portion 3 is rotatably supported by the peripheral portions 1b and 1b on both sides of the lid portion 3 by hinge members 10 'and 10'.

  The hinge member 10 ′ is ruptured from the groove portion 3 b of the lid portion 3 by supplementing the rotation around the groove portion 3 b of the lid portion 3 and reinforcing the periphery of the groove portion 3 b of the lid portion 3 when the airbag device 2 is operated. Is preventing.

  In the air bag grid hinge structure of the present embodiment, as shown in FIG. 3B or FIG. 3C, the translational motion prevention frame body 14 is provided integrally with the hinge member 10 ′, and the lid portion 3 and It is inserted between the peripheral portion 1b and the hinge member 10 '.

  As shown in FIG. 6B or FIG. 6C, the translational motion prevention frame body 14 prevents translational motion of the movable portion 12 in the vehicle compartment direction due to bending of the hinge portion 13 when pressed by the airbag 4. .

  When the vehicle airbag device 2 is operated, the lid portion 3 is pressed from the back side by the airbag 4 as the airbag 4 is inflated, and is cleaved from the groove portion 3a. From between, the inflated airbag 4 bulges out to the passenger seat.

<Configuration and assembly method of translational motion prevention frame body 14>
As shown in FIG. 4A, a translational motion preventing frame 14 is integrally formed on the hinge member 10 ′ according to the present embodiment.

  The translational motion prevention frame body 14 is a frame body having a rectangular shape in plan view, and has a pair of horizontal frame portions 14a and 14a that have a prismatic shape and face each other, and a pair of vertical frame portions 14b that have a prismatic shape and face each other. , 14b.

  One horizontal frame portion 14a is rotatably connected to the outer edge (opposite side of the movable portion 12 formation side) edge of the panel fixing portion 11A by a thin joint portion J.

  A plurality of rib portions R formed on the panel fixing portion 11A and the movable portion 12 are formed with a pair of cutout portions C and C at positions corresponding to the pair of vertical frame portions 14b and 14b, respectively. As shown in (b), when the translational motion prevention frame body 14 is bent along the joint portion J toward the movable portion 12 formation side, interference between the pair of vertical frame portions 14b and 14b and each rib portion R is avoided. Is done.

  Next, a process of fusing and fixing the hinge members 10 ′ and 10 ′ to the back side of the lid portion 3 and the peripheral portion 1 b will be described.

  First, as shown in FIG. 5 (b), the translational motion prevention frame body 14 formed integrally with the hinge member 10 'is bent along the joint portion J toward the movable portion 12 formation side, so that the panel fixing portion 11A and the movable portion are formed. Twelve rib portions R are not formed.

  Next, the end portions of the plurality of rib portions R formed on the panel fixing portion 11A and the movable portion 12 are heated by vibration welding or the like, and as shown in FIG. 5C, the lid portion 3 and the lid portion 3 It fuse | melts to the back surface side of the peripheral part 1b of both sides.

  The translational motion prevention frame body 14 is formed to be thicker than the hinge portion 13 and slightly thinner than the plurality of rib portions R formed on the panel fixing portion 11 </ b> A and the movable portion 12.

  For this reason, when the translational motion prevention frame body 14 is brought into contact with the panel fixing portion 11 </ b> A and the rib portion R non-forming surface of the movable portion 12, the end surface of each rib portion R is slightly smaller than the translational motion prevention frame body 14. Since it is higher, the translational motion prevention frame body 14 is not fused to the back side of the lid portion 3 and the peripheral portion 1b.

<Function and effect>
As shown in FIG. 6A, the translational motion prevention frame body 14 is interposed between the lid portion 3 and the peripheral portion 1b and the hinge member 10 ′.

  Since the translational motion preventing frame body 14 is formed thicker than the hinge portion 13, the casing that acts on the hinge portion 13 and the vertical frame portion 14 b in the vicinity of the hinge portion 13 when the airbag apparatus 2 is operated. The hinge portion 13 and the vertical frame portion 14b hardly bend in the direction of the passenger compartment due to the mutual force, and the lid portion 3 as shown in FIG. 6 (b) or FIG. 6 (c). And the translational movement of the movable part 12 toward the passenger compartment is prevented.

  On the other hand, since the translational motion prevention frame body 14 is joined only to the outer edge of the panel fixing portion 11A by the joint portion J, the bending in the rotation direction is hardly hindered, and the vertical frame portion 14b is not disturbed. Since it has flexibility with respect to the bending force acting in the rotating direction, the lid portion 3 and the movable portion 12 can smoothly rotate, and the lid portion of the airbag device can be reliably and quickly cleaved. it can.

  Moreover, since the translational motion prevention frame body 14 is integrally connected to the hinge member 10 'according to the present embodiment by the joint portion J formed to be thin, the translational motion prevention frame body 14 is connected to the joint portion J. The translational motion prevention frame body 14 can be assembled only by bending along the direction, and the workability of attaching the hinge member 10 ′ to the instrument panel 1 is good.

  As mentioned above, although the Example of embodiment which concerns on this invention has been explained in full detail with reference to drawings, the concrete structure is not limited to this embodiment, and the design of the grade which does not deviate from the summary of this invention Modifications are included in the present invention.

It is a figure of the instrument panel of a vehicle concerning the conventional example, and the airbag apparatus for passenger seats, a figure (a) is a front view of an instrument panel of vehicles, and figure (b) is a sectional side view of an airbag apparatus for passenger seats FIG. 7C is an enlarged view of a portion D1 in FIG. It is an enlarged view of D1 part of FIG.1 (b) which shows the problem of the hinge structure of the airbag grid of a prior art example, A figure (a) is a figure which shows the state which the lid part based on a prior art example was normally cleaved, FIG. (b) is a figure which shows the state which the lid part translated in the compartment direction, FIG. (c) is an enlarged view which shows the state before and after the cleavage of a lid part and a hinge member. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure of the instrument panel of a vehicle and the passenger-side airbag apparatus which concern on a present Example, A figure (a) is a front view of the instrument panel of a vehicle, A figure (b) is a side cross section of a passenger-seat airbag apparatus The figure and figure (c) are the enlarged views of the D2 part of figure (b). 4A and 4B are diagrams of the hinge member according to the present embodiment, where FIG. 4A is a perspective view, and FIG. 4B is a diagram illustrating a case where a translational motion prevention frame is bent at a joint portion and a notch portion of a rib portion is inserted. It is a perspective view of a state. Drawing (a)-figure (c) are figures showing an assembly process at the time of inserting a translational motion prevention frame between a lid part and a peripheral part, and a hinge member. It is an enlarged view of D2 part of Drawing 3 (b) showing the operation effect of the hinge structure of the air bag grid of an example, and figure (a) is a figure showing the state before cleavage of the lid part concerning an example, figure (b) ) Is a view showing a state in which the lid portion is normally cleaved, and FIG. (C) is an enlarged view showing a state before and after the cleaving of the lid portion and the hinge member.

Explanation of symbols

1b Peripheral part 2 Air bag device 3 Lid part 3a Groove part (central part)
4 airbag 10 'hinge member 11 fixed part 12 movable part 13 hinge part 14 translational motion prevention frame (translational motion prevention body)

Claims (1)

As the airbag is inflated during operation of the vehicle airbag device, the airbag is supported by the airbag, which is pressed from the rear side by the airbag and is torn from the center portion, rotatably supported on the peripheral portions on both sides of the lid portion. A grid hinge structure,
A fixing part fixed to the back side of the peripheral part of the lid part;
A movable part fixed to the back side of the lid part;
A flexible hinge part that rotatably connects the movable part and the fixed part;
A hinge member integrally having
A translational motion preventing body for preventing translational motion of the movable part in the direction of the passenger compartment due to bending of the hinge part when pressed by the airbag is provided between the lid part and the lid part peripheral part and the hinge member. The hinge structure of the air bag grid characterized by being inserted.

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