JPH11170950A - Air belt device - Google Patents

Abstract

(57) [Summary] In an air belt device, swing of a buckle device is allowed while avoiding interference between an inflator and another member. A buckle device (9) to which a tongue device (8) provided at an end of a shoulder belt (6) containing an inflatable bag (12) is pivotally supported on a seat base (10) via a fulcrum pin (17) so as to be swingable back and forth. Is done. The inflator 11 is not provided in the buckle device 9 and the seat base 10
And connected to the buckle device 9 by a flexible pipe 23. Even if the angle of the belt changes due to the front and rear position of the seat and the occupant's body type, the buckle device 9 can swing together with the tongue device 8 to absorb the change in the angle of the belt,
Moreover, since the inflator 11 does not swing even if the buckle device 9 swings, there is no possibility that the inflator 11 interferes with other members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air belt device for inflating a seat belt for restraining an occupant to a seat at the time of a vehicle collision with a high-pressure gas supplied from an inflator.

[0002]

2. Description of the Related Art A bag is stored inside a seat belt,
An air belt device that inflates the bag at the time of a vehicle collision to softly restrain an occupant is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-5600.
No. 1 has already known this.

[0003]

A buckle device to which a tongue device provided on a belt is coupled so as to compensate for a change in the angle of the belt depending on the front and rear position of the seat and the occupant's body shape when the seat belt device is worn. Is pivotally supported by the seat base so as to be able to swing back and forth, and the air belt device also needs to pivotally support the buckle device so as to be able to swing back and forth for the same reason.

FIG. 6 shows a main part of a conventional air belt device, in which a shoulder belt 01 and a lap belt 02 are provided.
A buckle device 04 to which a tongue device 03 provided at an end of the buckle device is coupled is pivotally supported by a seat base 05 via a fulcrum pin 06 so as to be able to swing back and forth. At the time of a vehicle collision, the high-pressure gas generated by the inflator 07 provided integrally with the buckle device 04 is supplied to the buckle device 04 and the tongue device 0.
3 and is supplied to the shoulder belt 01,
The shoulder belt 01 is expanded to softly restrain the occupant. In such a conventional air belt device, since the buckle device 04 is integrally provided with the inflator 07, when the buckle device 04 swings around the fulcrum pin 06, the inflator 07 also swings integrally, and the inflator 07 and the other inflator 07 There is a problem that a design constraint occurs in order to avoid interference with members.

The present invention has been made in view of the above circumstances, and has as its object to allow an air belt device to swing a buckle device while avoiding interference between an inflator and other members.

[0006]

According to one aspect of the present invention, there is provided a belt including an inflatable bag therein, one end of which is supported by a fixed portion, and A tongue device provided at the other end of the buckle device, a buckle device that is supported by the fixed portion so as to be able to swing back and forth and is coupled to the tongue device, an inflator that is supported by the fixed portion and generates high-pressure gas, and this inflator A flexible pipe connected to a buckle device, and inflating the bag by supplying high-pressure gas generated by an inflator at the time of a vehicle collision to the bag via the flexible pipe, the buckle device and the tongue device. It is characterized by the following.

According to the above configuration, when the occupant sits on the seat and couples the tongue device to the buckle device, the buckle device swings together with the tongue device even if the angle of the belt changes depending on the front and rear positions of the seat and the occupant's body shape. It can move to absorb the change in the angle of the belt. Also, even if the buckle device swings, the inflator supported by the fixed portion does not swing, so there is no need to interfere with other members, and supply of high-pressure gas from the inflator to the buckle device is obstructed via a flexible pipe. Can be done without.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

FIGS. 1 to 5 show an embodiment of the present invention. FIG. 1 is a side view of a front seat portion of a vehicle, FIG. 2 is a view in the direction of arrows in FIG. 1, and FIG. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. 3, and FIG.
It is a -5 line sectional view.

As shown in FIGS. 1 to 3, an air belt device for restraining an occupant (driver in the embodiment) to a front right seat 1 includes a shoulder belt retractor 3 provided below a center pillar 2 and a retractor 3 for the shoulder belt. A lap belt retractor 4 provided below the shoulder belt retractor 3, a shoulder belt 6 pulled out from the shoulder belt retractor 3 and extending via a slip guide 5 provided above the center pillar 2, A lap belt 7 pulled out from the belt retractor 4,
A tongue device 8 fixed to the ends of the shoulder belt 6 and the lap belt 7, a buckle device 9 supported by a seat base 10 made of a seat frame or a slide rail and coupled with the tongue device 8, and a buckle device 9 And an inflator 11 provided integrally.

The known shoulder belt retractor 3 and the lap belt retractor 4 wind the shoulder belt 6 and the lap belt 7 so that they can be pulled out, respectively, and an acceleration sensor (not shown) detects an acceleration equal to or higher than a predetermined value. At normal times, the belts 6 and 7 can be pulled out to allow the movement of the occupant's body. When the acceleration sensor detects an acceleration equal to or more than a predetermined value during a vehicle collision, the belts 6 and 7 cannot be pulled out. It locks and restrains the occupants. Known inflator 1
1 ignites when the acceleration sensor detects acceleration equal to or higher than a predetermined value, and generates high-pressure gas due to combustion of the propellant.

The lap belt 7 is composed of a plain synthetic fiber plain woven belt. On the other hand, the portion of the shoulder belt 6 that contacts the occupant's chest is composed of a cylindrical rubber bag 12 and a cover 13 that covers the outside, as shown in FIG. The cover 13 made of a circular knit has a property of easily expanding and contracting in the radial direction and hardly expanding and contracting in the longitudinal direction. Bag 12 and cover 1
3 is a flat band normally, but when a high-pressure gas is supplied from the inflator 11 to the bag 12, FIG.
And expands to the state shown in FIG. 2 to softly restrain the occupant.

As shown in FIG. 3 to FIG.
Is composed of an anchor member 14 and a buckle body 15. The upper end of the anchor member 14 is a buckle body 15
The lower end of the anchor member 14 is pivotally supported on a side surface of the seat base 10 via a fulcrum pin 17 so as to be swingable back and forth. Two mounting bands 20, 20 are fitted on the outer periphery of the inflator 11, and the mounting bands 20, 20 are fastened to the side surface of the seat base 10 by two bolts 21, 21, respectively.
The gas inlet 22 formed on the lower surface of the buckle body 15 and the inflator 11 are connected by a flexible pipe 23 that can be bent. As the flexible pipe 23, for example, a bellows tube made of metal or a pressure-resistant hose can be used.

At the top of the buckle body 15, a buckle 2 is provided.
6 is fixed. Further, a connection port 27 opened on the upper wall of the buckle body 15 and the gas introduction port 22 communicate with each other through a gas passage 28 formed inside the buckle body 15.

The bag 12 and the cover 13 of the shoulder belt 6 fitted to the upper outer peripheral surface of the tongue main body 31 of the tongue device 8 and the lap belt 7 superposed on the outside thereof are fastened by the annular holder 32. Fixed. The tongue 33 having the upper half embedded in the tongue main body 31 is fixed to the tongue main body 31 with bolts 34 passing through the holder 32, the lap belt 7, the cover 13, and the bag 12. On the lower surface of the tongue main body 31,
Connection pipe 3 insertable into connection port 27 of buckle body 15
5 is protruded. Buckle body 15 and connection pipe 35
A gas passage 36 that connects the connection port 27 with the inside of the bag 12 is formed inside the bag. A release button 37 for separating the tongue 33 coupled to the buckle 26 is provided on the buckle body 15.

Next, the operation of the embodiment of the present invention having the above-described configuration will be described.

As shown in FIG. 4, when the tongue 33 of the tongue device 8 is connected to the buckle 26 of the buckle device 9 to mount the air belt device, the connection pipe 35 of the tongue device 8 is fitted into the connection port 27 of the buckle device 9. Combine. When the angles of the shoulder belt 6 and the lap belt 7 change depending on the front and rear positions of the seat 1 and the occupant's body shape, the tongue device 8 connected to the shoulder belt 6 and the lap belt 7 rotates together with the buckle device 9 around the fulcrum pin 17 as shown in FIG. And swing in the direction of arrow AB in FIG. 4 to compensate for the angle change.

When the acceleration sensor detects an acceleration equal to or higher than a predetermined value at the time of a vehicle collision, the inflator 11 ignites by an ignition command from an ignition control device to generate high-pressure gas, and the high-pressure gas is flexible. From the pipe 23 to the gas inlet 22, gas passage 28 and connection port 2 of the buckle body 15
7, the connecting pipe 35 of the tongue main body 31 and the gas passage 3
6, is supplied into the bag 12 of the shoulder belt 6. As a result, when the shoulder belt 6 expands, the contact area with the occupant's chest increases compared to the shoulder belt 6 before expansion, so that the occupant can be restrained more softly. Shoulder belt 6 and lap belt 7
Is transmitted from the tongue device 8 to the seat base 10 via the buckle body 15 and the anchor member 14 of the buckle device 9.

As described above, even if the buckle device 9 swings, the inflator 11 connected to the buckle device 9 via the flexible pipe 23 is fixed to the seat base 10 so as not to swing. There is no possibility that the inflator 11 interferes with other members, and the degree of freedom in design is improved.

Although the embodiments of the present invention have been described in detail above, various design changes can be made in the present invention without departing from the gist thereof.

For example, the center pillar 2 is illustrated as a fixing portion to which one end of the shoulder belt 6 is connected, and the seat base 10 is illustrated as a fixing portion for supporting the buckle device 9 and the inflator 11. It is not limited to the embodiment. Also, instead of fixing the inflator 11 to the outer surface of the seat base 10,
As shown by a chain line in FIG. 5, it may be fixed to the inner surface of the seat base 10, so that the effective use of the space and the improvement of the appearance can be achieved at the same time.

[0022]

As described above, according to the first aspect of the present invention, when the occupant sits on the seat and couples the tongue device to the buckle device, the angle of the belt depends on the front and rear position of the seat and the occupant's body type. Even if it changes, the buckle device swings with the tongue device to absorb the angle change of the belt. Also, even if the buckle device swings, the inflator supported by the fixed portion does not swing, so there is no need to interfere with other members, and supply of high-pressure gas from the inflator to the buckle device is obstructed via a flexible pipe. Can be done without.

[Brief description of the drawings]

FIG. 1 is a side view of a front seat portion of a vehicle.

FIG. 2 is a view in the direction of arrows in FIG. 1;

FIG. 3 is a perspective view of a main part of the air belt device.

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 4;

FIG. 6 is an enlarged view of a main part of a conventional air belt device.

[Explanation of symbols]

 2 Center pillar (fixed portion) 6 Shoulder belt (belt) 8 Tongue device 9 Buckle device 10 Seat base (fixed portion) 11 Inflator 12 Bag 23 Flexible pipe

Claims (1)

[Claims] 1. A belt (6) containing an inflatable bag (12) therein and having one end supported by a fixing portion (2), and a tongue device (2) provided at the other end of the belt (6). 8)
A buckle device (9), which is supported by the fixed portion (10) to be able to swing back and forth and is coupled to the tongue device (8); and an inflator (11) supported by the fixed portion (10) to generate high-pressure gas. ) And a flexible pipe (23) for connecting the inflator (11) to the buckle device (9), and the high-pressure gas generated by the inflator (11) at the time of a vehicle collision is supplied to the flexible pipe (23). (23) An air belt device, wherein the bag (12) is inflated by supplying the bag (12) via a buckle device (9) and a tongue device (8).