JP3346096B2 - Vehicle airbag system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle airbag device.

[0002]

2. Description of the Related Art As a vehicle airbag device, for example, as disclosed in Japanese Patent Application Laid-Open No. 4-55142, a bag body having a gas injection port and always held in a folded state is disclosed. A gas generator connected to the side to enable the bag body to be deployed by the blown gas, a steering wheel as a fixed side of the bag body and the gas generator, a base plate supported by a vehicle body, and the like; A cover that is supported by the outer periphery and covers the bag body.

The gas generator is configured to output a signal when a collision sensor (not shown) such as a vehicle collision detects a load equal to or more than a predetermined value, and to blow out a high-pressure gas based on the signal.

The upper body of the occupant (not shown) can be held by inflating and expanding the bag body by the high-pressure gas supplied from the gas generator supplied to the inside of the bag body.

[0005]

However, in the conventional vehicle airbag device, when the bag body is fixed to the base plate, a separate annular stopper (retainer) is required, and the cost is reduced. Not only is it a cause of soaring, but improvement in weight is desired.

When the bag body is fixed to the base plate, first, the bag body is fixed to the annular stopper (retainer), and then the annular stopper (retainer) is fixed to the base plate. Therefore, there are many steps for fixing, and workability is required to be improved.

Further, the work of fixing the bag main body to the annular stopper (retainer) is a groping work due to being invisible, and improvement in workability is required.

Accordingly, the present invention has been made in view of the above points, and an object of the present invention is to reduce the cost and weight, reduce the number of fixing steps, and improve the workability of a vehicle air. A bag device is provided.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a bag body having a gas injection port and always held in a folded state, A gas generator connected to the bag main body so that the bag main body can be expanded by the jet gas, and a base plate supporting the bag main body and the gas generator on a fixed side,
In a vehicle airbag device having at least a cover supported on an outer peripheral portion of the base plate and covering the bag body, a vertical wall is formed in a closed loop shape on an inner peripheral portion of the base plate, and a vertical wall is formed inside the vertical wall. A tongue portion appropriately protruding toward the peripheral side is formed, and an inner terminal portion of the bag body superimposed on the lower side of the tongue portion through a through hole intermittently formed in a vertical wall of the base plate. It is characterized by being supported by the tongue of the base plate together with the mounting bracket of the gas generator.

According to a second aspect of the present invention, there is provided the vehicle airbag apparatus according to the first aspect, wherein a free end of a stud bolt of the base plate is provided at an inner end of the bag body and a mounting bracket of the gas generator. Characterized by being exposed through a.

[0011]

According to the first aspect of the present invention, the inner end portion of the bag body is inserted into the through hole of the vertical wall in a closed loop shape formed on the inner peripheral portion of the base plate, and is mounted together with the mounting bracket of the gas generator. Since it is sufficient that the bag body is superimposed on the tongue portion of the base plate, a separate retainer is not required for fixing the bag body to the base plate, so that the number of parts and the weight can be reduced.

According to the second aspect of the present invention, in addition to the operation of the first aspect, the free end of the stud bolt is exposed when the inner end portion of the bag base and the mounting bracket of the gas generator are assembled on the base plate. Therefore, the number of steps for fixing to the stud bolt is small and workability is improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show a vehicle airbag device 1 according to one embodiment of the present invention. FIG. 1 is an explanatory sectional view. 2 is an enlarged explanatory view of a main part of FIG. FIG. 3 is a perspective explanatory view of the inner terminal portion of the bag body and the inner peripheral portion of the base plate. FIG. 4 is an explanatory diagram of a main part taken along arrow A in FIG.

In this embodiment, a vehicle airbag apparatus 1 has a gas inlet 3 and is normally folded and held in a folded state. A gas generator 7 that enables the main body 5 to be deployed by the ejected gas; a metal base plate 9 that supports the bag main body 5 and the gas generator 7 on a fixed side such as a steering wheel or a vehicle body; At least a cover 15 that is supported by the rivet 13 on the outer peripheral portion 11 and covers the bag body 5 and is opened by the bag body 5 that can be deployed by the gas emitted from the gas generator 7.

On the inner peripheral portion 17 of the base plate 9,
The vertical wall 19 is formed in a closed loop shape, and a tongue 21 is formed to appropriately project toward the inner peripheral side 19a of the vertical wall 19.

The inner end portion 23 of the bag body 5 is overlapped on the lower side of the tongue portion 21 with interposed through holes 25 formed in the vertical wall 19 of the base plate 9 intermittently. Is formed.

At the left and right portions of the fixing portion 27, concave portions 29, 29,... Which are in contact with the surface of the vertical wall 19 where the through holes 25, 25,.
Is formed.

The stud bolt 3 of the base plate 9
1 free end 33 is connected to the inner terminal 23 of the bag body 5.
And it is exposed through the mounting bracket 35 of the gas generator 7.

Reference numerals 37 and 39 denote the bag body 5 respectively.
A stud bolt 31 formed in the fixing portion 27 of the inner terminal portion 23; and a stud bolt 31 formed in the tongue portion 21 of the base plate 9.

Therefore, according to this embodiment, the vertical wall 1 is formed in a closed loop shape formed on the inner peripheral portion 17 of the base plate 9.
9, the inner end portion 27 of the bag body 5 is inserted into the through hole 25, and the stud bolt 3 is superimposed on the tongue portion 21 of the base plate 9 together with the mounting bracket 35 of the gas generator 7.
Since the nut 41 is supported by being screwed into the base plate 1, a separate retainer is not required for fixing the bag body 5 to the base plate 9, so that the number of parts and the weight can be reduced.

When the inner end portion 27 of the bag body 5 and the mounting bracket 35 of the gas generator 7 are assembled on the base plate 9, the free end 33 of the stud bolt 31 is exposed. The number of fixing steps to the device is small, and workability is improved.

The embodiment shown in FIG. 5 is another embodiment of the present invention. The main difference from the above embodiment is the height of the vertical wall of the base plate.

That is, the height H2 of the vertical wall 53 of the base plate 51 shown in FIG. 5 is higher than the height H1 of the vertical wall 19 of the base plate 9 of the embodiment shown in FIG. The positional relationship between the folded bag body 5 inside the vehicle airbag device 1 and the gas generator 7 can be adjusted.

That is, in the case of the embodiment shown in FIG. 1, the height H1 of the vertical wall 19 of the base plate 9 is lower than the height H2 of the vertical wall 53 of the base plate 51. Plate 7a and ceiling inner surface 15 of cover 15
a to the vertical wall 5 of the base plate 51.
In the case of the height H2 of 3, the dimension h2 between the ceiling plate 7a of the gas generator 7 and the ceiling inner surface 15a of the cover 15 becomes larger, and the tactile sensation when the cover 15 is pressed from above becomes soft.

Therefore, as shown in FIG. 1, the vehicle airbag device 1 is incorporated in a steering wheel and the cover 15 is pressed by hand as a horn switch or the like, as shown in FIG. The size h1 of the cover 15 up to the ceiling inner surface 15a is increased to make it softer, or the size h2 of the gas generator 7 to the ceiling plate 7a of the gas generator 7 and the cover 15 is made smaller and harder as shown in FIG. The height H1, H of the vertical walls 19, 53
It is only necessary to select one of the two different base plates 9 and 51.

[0027]

As is apparent from the above, according to the first aspect of the present invention, a bag body having a gas inlet and normally held in a folded state is connected to the gas inlet side. A gas generator capable of expanding the bag main body with the jet gas, a base plate supporting the bag main body and the gas generator on a fixed side, and a cover supported by an outer peripheral portion of the base plate and covering the bag main body In the vehicle airbag device having at least a vertical wall formed in a closed loop shape on the inner peripheral portion of the base plate, and a tongue portion appropriately protruding toward the inner peripheral side of the vertical wall is formed. The inner terminal portion of the bag body, which is superimposed on the lower side of the tongue portion through a through hole formed intermittently in the vertical wall of the base plate, together with the mounting bracket of the gas generator. Since it is supported by the tongue of the base plate, the inner end of the bag body is inserted into the through hole of the vertical wall in a closed loop shape formed on the inner periphery of the base plate, and the mounting bracket of the gas generator is mounted. In addition, since it is sufficient that the bag body is superimposed on the tongue of the base plate, a separate retainer is not required for fixing the bag body to the base plate, so that the number of parts and the weight can be reduced.

According to the second aspect of the present invention, the free end of the stud bolt of the base plate is exposed through the inner end of the bag body and the mounting bracket of the gas generator. Therefore, in addition to the effect of claim 1, when the inner end portion of the bag body and the mounting bracket of the gas generator are assembled to the base plate, the free ends of the stud bolts are exposed, so that they are fixed to the stud bolts. The number of steps is small and workability is improved.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional explanatory view of a main part of FIG. 1;

FIG. 3 is an exploded perspective view of the base plate and the bag body of FIG. 1;

FIG. 4 is an explanatory diagram according to an arrow A in FIG. 3;

FIG. 5 is an explanatory sectional view of another embodiment of the base plate of FIG. 1;

[Explanation of symbols]

Reference Signs List 1 airbag device for vehicle 3 gas inlet 5 bag body 7 gas generator 7a ceiling plate of gas generator 9 base plate 11 outer peripheral portion of base plate 15 cover 15a inner surface of ceiling of cover 17 inner peripheral portion of base plate 19 vertical wall of base plate 19a Inner peripheral side of vertical wall 21 Tongue 23 Inner terminal of bag body 25 Through-hole in vertical wall of base plate 27 Fixed part of bag body 31 Stud bolt 33 Free end of stud bolt 35 Mounting bracket for gas generator 51 Base plate 53 Vertical wall of base plate H1 Height of vertical wall 19 of base plate 9 H2 Height of vertical wall 53 of base plate 51 h1, h2 Dimensions of ceiling plate of gas generator and inner surface of ceiling of cover

Claims (2)

(57) [Claims] A bag body which has a gas inlet and is normally held in a folded state; a gas generator connected to the gas inlet side to enable the bag body to be developed by a jet gas; An airbag device for a vehicle having at least a base plate that supports the bag body and the gas generator on a fixed side and a cover that is supported by an outer peripheral portion of the base plate and covers the bag body, wherein an inner periphery of the base plate In the portion, a vertical wall is formed in a closed loop shape, and a tongue portion appropriately protruding toward the inner peripheral side of the vertical wall is formed, and a through hole formed intermittently in the vertical wall of the base plate is interposed. The inner end portion of the bag body, which is superimposed on the lower side of the tongue portion, is supported by the tongue portion of the base plate together with the mounting bracket of the gas generator. Vehicle air bag device for you. 2. The vehicle airbag device according to claim 1, wherein a free end of a stud bolt of the base plate is exposed through an inner end of the bag body and a mounting bracket of the gas generator. An airbag device for a vehicle, comprising: