JP3741850B2 - Crew restraint system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an occupant restraint device capable of protecting a chest and a head of an occupant by inflating with high-pressure gas generated by an inflator during a vehicle side collision.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 9-220993 discloses an airbag device for side collision that is deployed between a door or a center pillar and a passenger at the time of a side collision of a vehicle and protects the chest and head of the passenger. Japanese Patent Laid-Open No. 6-64493 has already known an air belt device in which a bag is accommodated in a shoulder belt of a seat belt and the bag is inflated to protect a chest and a head of a passenger at the time of a vehicle side collision. Yes.
[0003]
[Problems to be solved by the invention]
By the way, in the conventional side collision airbag device, a head bag portion for protecting the passenger's head is integrally provided above the chest bag portion for protecting the passenger's chest. When a seat belt is used in combination with the apparatus, there is a possibility that the head bag portion interferes with the shoulder belt of the seat belt and smooth deployment is prevented. In addition, since the conventional air belt device for side collision needs to inflate one shoulder belt to protect both the chest and head of the occupant, the shoulder belt effectively protects the occupant's head. There is a problem that it is difficult to expand to a shape that can be.
[0004]
The present invention has been made in view of the above circumstances, and an object thereof is to provide an occupant restraint device capable of effectively protecting an occupant's chest and head by inflating with a high-pressure gas generated by a common inflator. .
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an invention described in claim 1 includes an inflator for generating high-pressure gas, a shoulder belt for restraining a chest of an occupant sitting on a seat, and a belt expansion housed in the shoulder belt. An occupant restraint device for supplying a high-pressure gas generated by an inflator to a belt inflating bag to protect the chest of the occupant by inflating the shoulder belt. In this case, a part of the high-pressure gas supplied from the inflator to the belt inflating bag is supplied to the auxiliary bag attached to the upper portion of the shoulder belt, so that the auxiliary bag is deployed between the head of the passenger and the inner surface of the vehicle body. It is characterized by that.
[0006]
According to the above configuration, when the impact of the side collision of the vehicle is detected, the high-pressure gas generated by the inflator is supplied to the belt inflating bag, the shoulder belt is inflated, and the occupant's chest is constrained to the seat to cause the side collision. The passenger's chest can be protected from the impact. When a part of the high-pressure gas that inflates the shoulder belt is supplied to the auxiliary bag, the auxiliary bag expands and expands between the passenger's head and the inner surface of the vehicle body. The part can be protected. By configuring the belt inflating bag and the auxiliary bag separately, the shape of the auxiliary bag can be set without being constrained by the shape of the belt inflating bag, and thus the head of the passenger is protected by the auxiliary bag. Can be carried out effectively. Moreover, since the belt inflating bag and the auxiliary bag are inflated with a common inflator, the structure can be simplified and the cost can be reduced.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0008]
1 to 6 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 two directions of FIG. 1, and FIG. 3 is a perspective view of an air belt device. 4 is an enlarged sectional view taken along line 4-4 of FIG. 3, FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 3, and FIG.
[0009]
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 at a lower portion of a center pillar 2, and the shoulder belt A lap belt retractor 4 provided on the lower side of the retractor 3, a shoulder belt 6 drawn from the shoulder belt retractor 3 and extending via a slip guide 5 provided on the upper part of the center pillar 2, and a lap belt retractor 4, a lap belt 7 pulled out from 4, a tongue device 8 fixed to the shoulder belt 6 and an end of the lap belt 7, and a seat base 10 formed of a seat frame or a slide rail, and the tongue device 8 is coupled. A buckle device 9 and an infrastructure provided integrally with the buckle device 9 And a chromatography data 11.
[0010]
The known shoulder belt retractor 3 and lap belt retractor 4 wind up the shoulder belt 6 and the lap belt 7 so that they can be pulled out, respectively, and in a normal time when an acceleration sensor (not shown) does not detect an acceleration exceeding a predetermined value. The belts 6 and 7 can be pulled out to allow the occupant to move, and when the acceleration sensor detects an acceleration exceeding a predetermined value during a vehicle collision, the belts 6 and 7 are locked so that they cannot be pulled out. The passenger is restrained. The known inflator 11 is ignited when the acceleration sensor detects an acceleration equal to or higher than a predetermined value, and generates high-pressure gas due to combustion of the propellant.
[0011]
Referring also to FIG. 4, the buckle housing 14 constituting the main body of the buckle device 9 has the inflator 11 fixed to the lower part and the buckle 15 fixed to the upper part. A lower end of an anchor member 17 whose upper end is fixed to the buckle housing 14 with a bolt 16 is supported by the seat base 10 via a fulcrum pin 18 so as to be swingable back and forth. A connection port 19 opened in the upper wall of the buckle housing 14 and the inflator 11 communicate with each other through a gas passage 20 formed inside the buckle housing 14.
[0012]
The belt expansion bag 12 and the cover 13 of the shoulder belt 6 fitted to the upper outer peripheral surface of the tongue housing 21 of the tongue device 8 and the lap belt 7 superimposed on the outside thereof are fastened and fixed by an annular holder 22. Is done. A tongue 23 having an upper half embedded in the tongue housing 21 is fixed to the tongue housing 21 with a bolt 24 penetrating the holder 22, the lap belt 7, the cover 13, and the belt inflating bag 12. A connecting pipe 25 that can be inserted into the connection port 19 of the buckle housing 14 protrudes from the lower surface of the tongue housing 21. A gas passage 26 is formed in the tongue housing 21 and the connecting pipe 25 to communicate the connecting port 19 with the belt inflating bag 12. A release button 27 for separating the tongue 23 coupled to the buckle 15 is provided on the buckle housing 14.
[0013]
As is apparent from FIGS. 3 and 5, the lap belt 7 is composed of a plain woven belt made of ordinary synthetic fibers. On the other hand, the portion of the shoulder belt 6 that comes into contact with the chest of the occupant is composed of a rubber belt inflating bag 12 formed in a cylindrical shape and a cover 13 that covers the outside thereof. The belt inflating bag 12 and the cover 13 normally have a flat band shape. However, when high-pressure gas is supplied from the inflator 11 to the belt inflating bag 12, the bag inflates into the state shown in FIGS. Restrains softly. When the cover 13 made of warp knitting spreads in the radial direction as the bag 12 expands, the cover belt 13 contracts in the longitudinal direction to generate initial tension on the shoulder belt 6.
[0014]
An auxiliary bag 28 is attached to the upper portion of the belt inflating bag 12 by sewing, and the auxiliary bag 28 and the belt inflating bag 12 communicate with each other through a communication hole 29 formed in the sewing portion. The auxiliary bag 28 folded and superimposed on the belt inflating bag 12 faces an opening 30 formed in the cover 13, and the opening 30 is closed by a patch 31 that can be easily broken.
[0015]
Next, the operation of the embodiment of the present invention having the above-described configuration will be described.
[0016]
As shown in FIG. 4, when the tongue 23 of the tongue device 8 is coupled to the buckle 15 of the buckle device 9 in order to attach the air belt device, the connecting pipe 25 of the tongue device 8 is inserted into the connection port 19 of the buckle device 9.
[0017]
When acceleration of a predetermined value or more is detected due to a side collision of the vehicle, the inflator 11 is ignited to generate high pressure gas, and the generated high pressure gas passes through the gas passage 20 of the buckle housing 14 and the gas passage 26 of the tongue housing 21. The belt is supplied into the belt expansion bag 12 of the shoulder belt 6, and the belt expansion bag 12 is inflated. When the shoulder belt 6 is inflated in this manner, the contact area with the chest of the occupant increases as compared to the shoulder belt 6 before being inflated, so that the occupant can be restrained more softly.
[0018]
As shown in FIG. 6, the high-pressure gas inflating the belt inflating bag 12 passes through the communication hole 29 and inflates the auxiliary bag 28. When the auxiliary bag 28 is inflated, the patch 31 of the cover 13 of the shoulder belt 6 is broken, and the auxiliary bag 28 is deployed from the opening 30. The auxiliary bag 28 deployed in this way is interposed between the center pillar 2 or the front door and the occupant's head as shown in FIGS. Can be protected.
[0019]
Since the belt inflating bag 12 and the auxiliary bag 28 are inflated by the common inflator 11, the cost can be reduced as compared with the case where the inflators are respectively provided. Further, since the auxiliary bag 28 is manufactured separately from the belt inflating bag 12 and integrated, the shape of the auxiliary bag 28 can be set without being constrained by the shape of the belt inflating bag 12. The head of the occupant can be effectively protected by the bag 28.
[0020]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0021]
【The invention's effect】
As described above, according to the invention described in claim 1, when the impact of the side collision of the vehicle is detected, the high-pressure gas generated by the inflator is supplied to the belt inflating bag, and the shoulder belt is inflated. The passenger's chest can be constrained to the seat to protect the passenger's chest from the impact of a side collision. When a part of the high-pressure gas that inflates the shoulder belt is supplied to the auxiliary bag, the auxiliary bag expands and expands between the passenger's head and the inner surface of the vehicle body. The part can be protected. By configuring the belt inflating bag and the auxiliary bag separately, the shape of the auxiliary bag can be set without being constrained by the shape of the belt inflating bag, and thus the head of the passenger is protected by the auxiliary bag. Can be carried out effectively. Moreover, since the belt inflating bag and the auxiliary bag are inflated with a common inflator, the structure can be simplified and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a front seat portion of a vehicle. FIG. 2 is a perspective view taken along two directions in FIG. 1. FIG. 3 is a perspective view of an air belt device. [Fig. 3] Enlarged sectional view taken along line 5-5 in Fig. 3 [Fig.
1 Seat 6 Shoulder Belt 11 Inflator 12 Belt Expansion Bag 28 Auxiliary Bag

Claims (1)

An inflator (11) for generating high-pressure gas;
A shoulder belt (6) for restraining the chest of an occupant sitting on the seat (1);
A belt inflating bag (12) housed inside the shoulder belt (6), and for inflating the high-pressure gas generated by the inflator (11) when a side impact of the vehicle is detected In the occupant restraint device that supplies the bag (12) and inflates the shoulder belt (6) to protect the occupant's chest,
A part of the high-pressure gas supplied from the inflator (11) to the belt inflating bag (12) is supplied to the auxiliary bag (28) attached to the upper portion of the shoulder belt (6). An occupant restraint device that is deployed between an occupant's head and a vehicle body inner surface.

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