JPH0516514U - Air bag device - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain an airbag device capable of cushioning an impact when the cover and the windshield glass hit each other without complicating the manufacturing of the airbag device. A door 16 as a cover is arranged on an instrument panel 14 so as to be rotatable around one end 16A, and a cored bar 20 is integrally provided on the door 16 side of the door 16. In the door 16, a cushioning member 46 that absorbs an impact caused by the other end 16B hitting the windshield glass 12 is embedded in the other end 16B of the door 16 while being disposed in the recess 20B. When the vehicle suddenly decelerates, gas is generated from the inflator 40, and this gas is supplied into the bag body to inflate the bag body. Due to the expansion of the bag body, the door 16 rotates around the end portion 16A in a direction in which the other end portion 16B approaches the windshield glass 12, and the expanded bag body is directed toward the front of the occupant through the opening generated by this rotation. Project.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an airbag device that protects an occupant with a bag that is inflated when the vehicle suddenly decelerates.

[0002]

[Prior Art]

 In an airbag device, for example, an airbag device used in a passenger seat of a vehicle, an airbag device including a bag body and an inflator that generates gas when the vehicle suddenly decelerates is housed in a space in front of the passenger seat of the vehicle. The bag body is covered with a cover rotatably provided around one end.

At the time of sudden deceleration of the vehicle, due to the expansion of the bag body by the gas generated by the inflator, the cover is rotated around one end toward the windshield glass, and this rotation is performed. The inflated bag is projected from the opening created by the above to the front side of the vehicle of the occupant.

[0004]

[Problems to be solved by the device]

 However, in the above conventional airbag device, it is necessary to devise the size and shape of the cover so that the other end of the cover does not hit the windshield glass due to the rotation of the cover, which makes the manufacturing of the airbag device complicated. there were.

Further, even if the other end of the cover hits the windshield glass, there is a demand for buffering the shock.

In consideration of the above facts, the present invention has an object to obtain an airbag device capable of cushioning the impact when the cover and the windshield glass hit, without complicating the manufacturing of the airbag device. ..

[0007]

[Means for Solving the Problems]

 The airbag device according to the present invention includes a bag body for protecting an occupant, a gas generating means for generating gas when the vehicle is suddenly decelerated and inflating the bag body by the gas, and rotatable about one end. A cover which is provided and covers the bag body at a normal time and is rotated around the one end by expansion of the bag body; a core member integrally provided on the cover; and an occupant side of the core member. And a cushioning member provided on the cover.

[0008]

[Action]

 According to the above invention, the bag is inflated by the gas generated by the gas generating means when the vehicle is rapidly decelerated. Due to the expansion of the bag body, the cover rotates about one end, and the bag body projects from the opening formed by this rotation. In the present invention, the cushioning member is provided at a portion closer to the occupant of the cover than the core material provided integrally with the cover.

Therefore, when the airbag device of the present invention is used for the passenger seat of an occupant, for example, even if the other end of the cover hits the windshield glass, the shock-absorbing member cushions the shock and the windshield glass is damaged. Can be prevented.

When the airbag device according to the present invention is applied to an airbag device in which the bag body is inflated based on the deformation of the door due to the collision of the vehicle, for example, the other end of the cover is The shock caused by hitting the door trim is damped by the shock absorbing member, which prevents damage to the door trim.

[0011]

【Example】

 An embodiment in which the airbag apparatus according to the present invention is applied to a passenger seat will be described below with reference to FIGS. 1 to 5. 1 and 2, arrow FR indicates the vehicle front direction, arrow UP indicates the vehicle upward direction, and arrow IN indicates the vehicle interior direction.

As shown in FIG. 2, an opening 13 is formed in the instrument panel 14 arranged on the vehicle lower side of the windshield glass 12, and the inside of the instrument panel 14 corresponding to the opening 13 is formed. Accommodates the airbag device 10.

As shown in FIG. 1, the airbag device 10 includes a door 16 made of urethane rubber, and the door 16 is provided before actuation of a starting portion 42 for operating the airbag device 10. In this state, the bag body 18 accommodated in the instrument panel 14 is covered. As shown in FIG. 3, the door 16 is provided with a cored bar 20 made of aluminum or the like integrally with the surface of the door 16 on the front side of the vehicle. 1 and 2 is extended from the end portion 16A to form an extension portion 22. The cored bar 20 may be embedded in the door 16. The extending portion 22 is provided with a bent portion 22A slightly bent so as to be convex toward the outside of the door 16 and a mounting portion 22B which is integrated with the bent portion 22A and extends toward the vehicle front side.

As shown in FIG. 4, at both ends of the bending portion 22A in the vehicle width direction, cylindrical members 25 having openings 25A that are open along the entire axial direction are arranged. The cylindrical member 25 is fixed to both ends of the bent portion 22A in the vehicle width direction by crimping the opening 25A. The cylindrical member 25 covers the edge portion of the bent portion 22A and prevents the bag body 18 from being damaged by the inflated bag body 18 hitting the edge portion. In this case, the opening 25A and the bent portion 22A are bonded by welding or the like, if necessary. Instead of fixing the cylindrical member 25 to the bent portion 22A, the edge portion of the bent portion 22A may be covered with the resin 23 as shown in FIG.

As shown in FIG. 1, a plurality of mounting holes 24 are formed in the mounting portion 22 B, and the bracket 28 fixed to the base portion 27 of the upper panel 26 is supported in the mounting holes 24. The protrusion 30 is fixed. As a result, the door 16 is rotatable about the end portion 16A in the direction of arrow A in FIG. 1, that is, in the direction in which the other end portion 16B of the door 16 approaches the windshield 12, and by this rotation. The expanded bag body 18 can be projected from the resulting opening.

As shown in FIG. 3, the other end portion 20A of the cored bar 20 is slightly bent toward the inside of the door 16 (front side of the vehicle), and then is arranged substantially parallel to the door 16 and has a recess 20B. Has been done. A buffer member 46 made of rubber or the like softer than urethane rubber forming the door 16 is disposed in the recess 20B, and the buffer member 46 is embedded in the other end 16 of the door 16. As the cushioning member 46, a general rubber having a higher foaming property than the urethane rubber forming the door 16 can be applied. The cushioning member 46 is embedded in the portion of the door 16 that contacts the windshield glass 12 when the door 16 rotates in the direction of arrow A in FIG.

A base portion 27 of the upper panel 26 is formed in a flat plate shape, and an end portion of the base portion 27 on the rear side of the vehicle is bent in a crank shape to serve as a mounting portion 29 arranged in parallel with the base portion 27. There is. A plurality of circular holes 29A are formed in the mounting portion 29, and a bolt (not shown) inserted into the mounting holes 48A of the mounting frame 48 fixed to the circular holes 29A and the peripheral edge of the opening of the bag body 18. The upper panel 26 is fixed to the mounting frame 48 by means of a nut and a nut.

A metal lower panel 34 is disposed on the vehicle lower side of the upper panel 26. A cylindrical member 35 is caulked and fixed to the end of the lower panel 34 on the vehicle rear side over the entire vehicle width direction in the same manner as the cylindrical member 25. Incidentally, as described above, instead of fixing the cylindrical member 35 to the end portion of the lower panel 34, the end portion of the lower panel 34 may be covered with resin.

Between the lower panel 34 and the upper panel 26, metal side panels 36 and 38 are arranged at both ends in the vehicle width direction. The vehicle upper and lower side walls of the side panels 36 and 38 are fixed to both ends of the upper panel 26 and the lower panel 34 in the vehicle width direction by welding. These side panels 36, 38 are fixed at their vehicle rear side end portions to side surfaces 48C, 48D of the mounting frame 48 by bolts and nuts (not shown). A cylindrical member 37 is fixed to the side surfaces of the side panels 36, 38 on the vehicle rear side in the same manner as the cylindrical member 25. The ends of the side panels 36, 38 on the vehicle rear side may be covered with resin. A substantially semi-cylindrical center panel 50 is arranged at a portion on the vehicle front side between the upper panel 26 and the lower panel 34 with its opening facing the side opposite to the door 16. The center panel 50 is formed with a plurality of gas passage holes 52 on the peripheral surface, which serve as gas passages.

Inside the opening of the center panel 50, an inflator 40 having a circular hole 40B for gas passage is arranged so that the circular hole 40B faces the gas passage hole 52. Further, the inflator 40 is provided with a starting portion 42 at one end 40A, the starting portion 42 is inserted into the cutout portion 44 of the side panel 38, and the small diameter portion 41 formed at the end opposite to the starting portion 42 is formed. It is arranged in a state of being inserted into the insertion hole 37 of the side panel 36. A screw (not shown) penetrating the lower panel 34, the center panel 50 and the spacer 52 is screwed to the one end portion 40A of the inflator 40 from the vehicle lower side, and further, the bracket 28, the base portion 27 of the upper panel 26, the center panel from the vehicle upper side. A screw (not shown) that penetrates 50 and the spacer 56 is screwed. Thereby, the inflator 40 is fixed in the opening of the center panel 50. Inside the inflator 40, a detonator and an explosive agent (not shown) are arranged on the side of the starting portion 42, and further, a gas generating substance (not shown) is arranged on the outer periphery thereof. Although not shown, the starter 42 is provided with an inertial body that inertially moves due to sudden deceleration of the vehicle, and is always biased in the direction of collision with the detonator and is normally locked to be detonated. An ignition pin is provided, which is separated from the lock and is released by the inertial movement of the inertial body to collide with the detonator and operate the detonator. Further, a release pin 64 is provided to prevent the locked state of the ignition pin from being released before the air bag device 10 is assembled, and to release the locked state of the ignition pin after the assembled state. ..

As shown in FIG. 2, the airbag device 10 configured as described above has the opening 13 through the leg portion 54A in a state where the axial intermediate portion is held by the holding portion 54B of the center bracket 54. The side panels 36 and 38 are fixed inside the instrument panel 14 via brackets (not shown).

The operation of this embodiment will be described below. In a normal state in which the vehicle is not suddenly decelerated, the activation unit 42 does not operate, and the door 16 covers the bag body 18.

When the vehicle suddenly decelerates from this normal state, the inertial body of the starting portion 42 moves inertially, and this inertial movement releases the locked state of the ignition pin of the starting portion 42, causing the ignition pin to move to the detonator of the inflator 40. Upon collision, the detonator is ignited, the explosive is ignited by the ignition, and the gas generating substance in the inflator 40 is rapidly burned to generate gas. The gas is supplied into the bag body 18 through the circular hole 40B and the gas passage hole 52. The bag body 18 is inflated by this gas, and the door 16 receives pressure due to the expansion of the bag body 18 and rotates in the direction of arrow A in FIG. 1 about the one end 16A, and the opening formed by this rotation. The bag body 18 projects from the portion toward the vehicle front side of the occupant.

In this case, the shock caused when the other end 16 B of the door 16 hits the windshield glass 12 due to the rotation of the door 16 is buffered by the buffer member 46, so that the windshield glass 12 is not damaged. Absent. Moreover, in this embodiment, the windshield glass 12 can be prevented from being damaged only by burying the cushioning member 46 in the door 16, so that the manufacturing of the airbag device 10 is not complicated.

Further, in the above-described embodiment, the core metal 20 is provided with the recessed portion 20B, and the cushioning member 46 is disposed in the recessed portion 20B, so that the thickness dimension of the other end portion 16B of the door 16 can be suppressed. The design surface of the door 16 (the surface on the occupant side) can be in the same state as the conventional state in which the other end portion 16B does not project to the occupant side.

In addition, in the above-described embodiment, even if the occupant inertially moves due to sudden deceleration of the vehicle and the bag body 18 is pressed by the occupant, the bent portion 22A of the cored bar 20, the side panels 36, 38, and the lower panel 34. Since the cylindrical members 25, 37, and 35 are fixed to each other and the expanded bag body 18 does not hit the edge portion of the metal, the bag body 18 is not damaged.

[0027]

[Effect of the device]

 As described above, since the airbag device according to the present invention has the above-mentioned configuration, the airbag device can absorb the impact when the cover and the windshield glass hit each other without complicating the manufacturing of the air bag device. It has the excellent effect of being able to obtain

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an airbag device according to the present invention.

FIG. 2 is a cross-sectional view showing a state in which an airbag device is attached to a vehicle for a passenger seat of the vehicle.

FIG. 3 is a cross-sectional view of a door of the airbag device.

FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1 showing a state where a cylindrical member is attached to the cored bar.

5 is a cross-sectional view taken along line VV of FIG. 1 showing a state where a core metal is covered with resin.

[Explanation of symbols]

 10 Airbag Device 16 Door (Cover) 18 Airbag Bag (Bag) 20 Core Bar (Core) 40 Inflator (Gas Generating Means) 42 Starting Part (Gas Generating Means) 46 Cushioning Member

Claims (1)

[Scope of utility model registration request] 1. A bag body for protecting an occupant, a gas generating means for generating a gas when the vehicle is suddenly decelerated and inflating the bag body by the gas, and a rotatably provided one end as a center. A cover that covers the bag body and is rotated about the one end by expansion of the bag body, a core member integrally provided on the cover, and an occupant side of the core member, An airbag device, comprising: a cushioning member provided on the cover.