JP2010083384A - Occupant restraint system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an occupant restraint system enhancing the restraint performance from the vehicular interior side of an occupant. <P>SOLUTION: (1) The occupant restraint system 10 includes an airbag 20 arranged inside a seat upper part and deployed sidewise in the vehicular interior side at the head of the occupant, and a strap 30 with one end 31 thereof fitted to the seat upper end, the other end 32 thereof fitted to a seat lower part, and an intermediate part 33 thereof fitted to a part forming a fore end 21 when the airbag is deployed. (2) The seat upper part containing the airbag 20 therein forms an upper part of a seatback 91 or a head rest 93, the seat upper end with one end 31 of the strap fitted thereto forms an upper end of the seatback 91 or the head rest 93, and a seat lower part with the other end 32 of the strap fitted thereto forms the vehicular interior side of a lower part of the seatback 91 or the vehicular interior side of a seat cushion 92. In a far-side impact, the airbag 20 can be supported at both ends by the fore end 21 and a base end 22, and the restraint performance of the occupant from the vehicular interior side can be enhanced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an occupant restraint device that can cope with a far-side collision and / or a vehicle rollover.

In Patent Document 1, in the event of a side collision, the airbag is deployed to the vehicle interior side of the occupant's upper body, and the regulating member is projected from the airbag to the vehicle interior side to prevent the airbag from escaping to the vehicle interior. And the side airbag apparatus which restrained the movement to the vehicle inside of a passenger | crew is disclosed.
JP2007-230310

However, the occupant restraint device of Patent Document 1 has the following problems to be solved.
(I) After the protrusion, one end of the regulating member is a free end, and since the support of the airbag by the regulating member depends on the rigidity (bending rigidity) of the regulating member, the airbag is sufficiently supported from the inside of the vehicle. For restraining, there is room for improvement in the support structure of the airbag.
(Ii) Since the airbag and the restricting member are deployed and protruded on the vehicle inner side of the occupant upper body, there is room for improvement in order to restrain both the occupant's head and upper body.

An object of the present invention is to provide an occupant restraint device that improves the restraint performance of the occupant from the inside of the vehicle (compared to a conventional device such as Patent Document 1).
Another object of the present invention is to provide an occupant restraint device capable of improving the restraint performance of the occupant from the inside of the vehicle (compared to a conventional device such as Patent Document 1) and restraining both the head and the upper body. There is.

  The occupant restraint device of the present invention that solves the above problems or achieves the above object is as follows.

(1) an airbag that is disposed inside the upper portion of the seat and that is deployed toward the vehicle inner side of the occupant head;
A strap with one end attached to the upper end of the seat, the other end attached to the lower portion of the seat, and an intermediate portion attached to a portion that becomes the tip when the airbag is deployed;
An occupant restraint device.
The above (1) can be applied to all embodiments of the present invention described later.

(2) The upper part of the seat where the airbag is disposed is an upper part of the seat back, and the upper end part of the seat to which the one end of the strap is attached is the center part in the left-right direction of the upper part of the seat back or the vehicle outer part. The occupant restraint device according to (1), wherein the seat lower portion to which the other end of the strap is attached is a vehicle inner side portion of the seat back lower portion.
The above (2) can be applied to Example 1 of the present invention described later.
(3) The upper part of the seat where the airbag is disposed is the upper part of the seat back, and the upper end of the seat to which the one end of the strap is attached is the center part in the left-right direction of the upper end of the seat back or the vehicle outer side. The occupant restraint device according to (1), wherein the lower portion of the seat to which the other end of the strap is attached is a vehicle inner side portion of a seat cushion.
The above (3) can be applied to Example 2 of the present invention described later.
(4) The upper part of the seat where the airbag is disposed is a headrest, and the upper end part of the seat to which the one end of the strap is attached is the center part in the left-right direction of the upper part of the headrest or the vehicle outer side. The occupant restraint apparatus according to (1), wherein the lower part of the seat to which the other end is attached is one of a vehicle inner side part of the seat back lower part and a vehicle inner side part of the seat cushion.
The above (4) can be applied to Example 3 of the present invention described later.

According to the occupant restraint device of (1) above, after the airbag deployment is completed, the leading end portion of the airbag extends between the leading end portion of the airbag and one end of the strap attached to the upper portion of the seat (and the airbag portion). The strap portion extending between the front end portion of the bag and the other end of the strap attached to the lower portion of the seat) is supported from the seat by a tensile force acting on the strap portion. As a result, the airbag after deployment is in a state where both ends of the airbag are restrained in the vehicle inner direction or close to the restrained state by the distal end portion of the airbag and the proximal end portion of the airbag. As a result, a conventional airbag (for example, Patent Document 1) in which the load in the vehicle inner direction from the passenger's head acting on the airbag is applied to the airbag at the time of a far-side collision and / or when the vehicle rolls over. Compared with the apparatus), the airbag can be received more effectively, and the restraining performance of the occupant head in the vehicle inner direction can be improved.
The airbag restrains the head of the occupant and pulls out the strap. Since the occupant's head is restrained by the airbag and the occupant's shoulder and chest are restrained by the strap, both the head and upper body can be restrained.

According to the occupant restraint device of (2) above, since the airbag is disposed at the upper part of the seat back, the airbag can be reliably deployed on the side of the occupant head, and the occupant head can be protected. .
In addition, since the other end of the strap is attached to the inner part of the vehicle below the seat back, the strap can be routed only to the seat back. Not affected or difficult to be affected.

According to the occupant restraint device of (3) above, since the airbag is disposed on the upper portion of the seat back, the airbag can be reliably deployed on the occupant head side, and the occupant head can be protected. .
In addition, since the other end of the strap is attached to the vehicle inner side portion of the seat cushion, it is easier to restrain the airbag tip portion against the load in the vehicle inner direction than when the other end of the strap is attached to the seat back. Become.

According to the occupant restraint device of (4) above, since the airbag is disposed on the headrest, the airbag can be reliably deployed on the side of the occupant head, and the occupant head can be protected.
One end of the strap is attached to the headrest, and the middle part of the strap is attached to the tip of the airbag when it is deployed. In addition, the strap can easily cross the upper part of the occupant head from the rear to the front.
The other end of the strap may be attached to the lower part of the seat back or attached to the seat cushion. However, when attached to the lower part of the seat back, the effect of the attachment of the other end of the strap to the lower part of the seat back in the above (2) The same effect can be obtained, and when it is attached to the seat cushion, the same effect as the effect of attaching the other end of the strap to the seat cushion in (3) is obtained.

The occupant restraint device of the present invention will be described below with reference to the drawings.
1 to 4 show the occupant restraint device in the airbag deployment state of the first embodiment of the present invention, and FIGS. 5 to 7 show the occupant restraint device in the airbag non-deployment state of the first embodiment of the present invention.
FIGS. 8 to 10 show an occupant restraint device in the airbag deployment state according to the second embodiment of the present invention, and FIGS. 11 to 13 show an occupant restraint device in the airbag non-deployment state according to the second embodiment of the present invention.
14 to 16 show the occupant restraint device in the middle of the airbag deployment according to the third embodiment of the present invention, and FIGS. 17 to 19 show the occupant restraint device in the airbag deployment completed state according to the third embodiment of the present invention. 20 to 22 show an occupant restraint device in an airbag non-deployed state according to Embodiment 3 of the present invention.
Structural parts common to all embodiments of the present invention are denoted by the same reference numerals throughout all of the embodiments of the present invention.

[Embodiment 1] FIGS. 1 to 7
The occupant restraint device 10 of the present invention is a farside collision (and / or vehicle rollover) device among devices that restrain the occupant J at the time of a vehicle collision. The occupant restraint device 10 of the present invention may be provided together with a general three-point seat belt device 1. A general three-point seat belt device 1 includes a shoulder belt 2, a lap belt 3, a tongue 4, a buckle 5, a retractor 6, a wire or belt 7, an anchor 8, and a slip joint 9.

  The occupant restraint device 10 of the present invention includes an airbag 20 and a strap 30 (may be referred to as a tether). The airbag 20 is disposed inside the upper portion of the seat 90 and is deployed toward the vehicle inner side of the head of the occupant J when the vehicle collides. The strap 30 has one end 31 attached to the upper end portion of the seat 90, the other end 32 attached to the lower portion of the seat 90, and an intermediate portion 33 (a portion between the one end 31 and the other end 32) deployed in the airbag. It is fixedly or slidably attached to the portion 21 that becomes the distal end portion.

The seat 90 includes a seat back 91, a seat cushion 92, and a headrest 93. The upper part of the seat 90 where the airbag 20 is disposed when the vehicle is not collided is the upper part of the seat back 91 or the headrest 93.
The upper end portion of the seat 90 to which the one end 31 of the strap 30 is attached is the upper end portion of the seat back 91 or the headrest 93.
A lower portion of the seat 90 to which the other end 32 of the strap 30 is attached is a lower portion of the seat back 91 or a seat cushion 92.

  The airbag 20 is folded and disposed in the upper portion of the seat 90 when the airbag is not deployed, and is supplied with inflation gas from the inflator 23 disposed in the upper portion of the seat 90 when the vehicle collides. The vehicle is deployed and inflated from above to the vehicle inner side of the head of the passenger J. When the airbag 20 is deployed, it pushes open the inner door 24 of the airbag device, or breaks the seam on the upper part of the seat 90 (breaks the sewing thread), and deploys and expands outside the seat 90.

  The strap 30 is disposed inside the seat 90 (at least one of the seat back 91, the seat cushion 92, and the headrest 93) when the airbag is not deployed, and is pulled by the airbag 20 that is deployed and inflated when the vehicle collides. Then, the sewing thread of the sheet 90 is broken and developed outside the sheet 90.

  The intermediate portion 33 of the strap 30 is fixed by sewing or the like to the portion 21 that becomes the tip when the airbag 20 is deployed, or is slidably engaged (for example, the tip of the airbag 20). The slip ring 25 is fixed to the portion 21 to be a part, and the strap 30 is slidably inserted into the slip ring 25). The strap 30 is disposed in the seat 90 with a slack (with a surplus length) when the airbag is not deployed so that the strap 30 can be deployed to the airbag tip 21 when the airbag 20 is deployed. When the airbag 20 is deployed, the strap 30 is pulled out of the seat 90 by breaking the seam of the seat 90 by the airbag 20. In the deployed state of the airbag 20, the strap 30 is attached to the strap portion 34 between the one end 31 of the strap 30 and the intermediate portion 33 attached to the airbag leading end 21, the other end 32 of the strap 30, and the airbag leading end 21. The lengths of the strap portions 34 and 35 are set in advance so that the strap portion 35 between the attached intermediate portion 33 and the strap portion 35 is tensioned.

In the deployed state of the airbag 20, the airbag 20 is deployed and inflated between the distal end portion 21 and the proximal end portion 22, the distal end portion 21 is supported by a tensioned strap 30, and the proximal end portion 22 is supported by the upper portion of the seat 90. Supported. Thus, in the deployed state, the airbag 20 is in a state where both ends are supported or is close to both ends supported in the left-right direction of the vehicle.
The above configuration can be commonly applied to all the embodiments of the present invention.

The first embodiment of the present invention further has the following unique configuration.
In the passenger restraint apparatus 10 according to the first embodiment of the present invention, the upper part of the seat 90 on which the airbag 20 is disposed is the upper part of the seat back 91. The upper end portion of the seat 90 to which the one end 31 of the strap 30 is attached is the center portion in the left-right direction of the upper end portion of the seat back 91 or the vehicle outer side portion (preferably the vehicle outer side portion from the headrest stay 94 outside the vehicle). The lower part of the seat 90 to which the other end 32 of the strap 30 is attached is the lower part of the vehicle inner side (the vehicle inner side in the vehicle left-right direction) of the seat back 91.

  In the airbag deployment state, the airbag 20 is deployed and inflated above the shoulder of the occupant J on the vehicle lateral direction inside the occupant J's head and on the vehicle lateral direction inside of the occupant J. In the airbag deployment state, the strap portion 34 passes through the rear of the neck of the occupant J and above the shoulder of the occupant J from the vehicle outer side than the headrest stay 94 at the upper part of the seat, and passes through the shoulder of the occupant. The strap portion 35 extends to the front end portion 21 and extends from the front end portion 21 of the airbag in the deployed state to the lower portion of the seat from the front of the shoulder portion inside the vehicle of the occupant J through the side of the occupant inside the vehicle.

Next, the operation and effect of the occupant restraint device 10 according to the first embodiment of the present invention will be described.
At the time of a vehicle collision, the sensor detects a vehicle collision, transmits an electric signal to the inflator 23 to ignite, and supplies the inflation gas of the inflator 23 to the airbag 20 to deploy and inflate the airbag 20.

  In the occupant restraint device 10 according to the first embodiment of the present invention, after the airbag 20 is completely deployed, the distal end portion 21 of the airbag 20 is connected to the distal end portion 21 of the airbag 20 and one end 31 of the strap 30 attached to the upper portion of the seat. A strap portion 34 extending between and / or a strap portion 35 extending between the leading end 21 of the airbag 20 and the other end 32 of the strap 30 attached to the lower portion of the seat, and / or It is supported from the sheet 90 by a tensile force acting on 35. As a result, the airbag 20 after deployment is in a state where both ends of the airbag 20 are restrained in the vehicle inner side or close to the restrained state by the distal end portion 21 of the airbag 20 and the proximal end portion 2 of the airbag 20. As a result, a conventional airbag (for example, a device disclosed in Patent Document 1) that is free from one end of the load in the vehicle inner side from the passenger's head that acts on the airbag 20 at the time of a far-side collision and / or rollover. As compared with the above, the airbag 20 can be received more effectively, and the restraining performance of the occupant head in the vehicle inner direction can be improved.

In addition, the airbag 20 is deployed to restrain the occupant J's head, and at the same time, serves to pull out the strap 30 when deployed. Since the head of the occupant J is restrained by the airbag 20 and the shoulder and chest of the occupant J are restrained by the strap 30, both the head and the upper body can be restrained. Thereby, it is possible to suppress the load applied to the neck of the occupant J at the time of a far-side collision and / or at the time of vehicle rollover.
The above operations and effects are commonly applied to all embodiments of the present invention.

In the passenger | crew restraint apparatus 10 of Example 1 of this invention, the following specific effect | action and effect are acquired.
In the occupant restraint device 10 according to the first embodiment of the present invention, since the airbag 20 is disposed on the upper portion of the seat back 91, the airbag 20 can be reliably deployed on the vehicle inner side of the occupant's head. In the event of a collision and / or vehicle rollover, the passenger head can be protected.

  Further, since the other end 32 of the strap 30 is attached to the vehicle inner side portion below the seat back 91, the strap 30 can be routed only to the seat back 91 (not on the seat cushion 92), and the airbag of the strap 30 is deployed. The pulling out and unfolding from the seat back 91 is not affected by the tilting of the seat back 91 and the seat cushion 92, or is difficult to receive.

[Embodiment 2] FIGS. 8 to 13
In the description of the first embodiment of the present invention, the configurations, operations, and effect portions that are commonly applied to all the embodiments of the present invention are also applied to the second embodiment of the present invention. Hereinafter, only the configuration, operation, and effect unique to the second embodiment of the present invention will be described.

A configuration unique to the second embodiment of the present invention will be described.
In the passenger restraint apparatus 10 according to the second embodiment of the present invention, the upper part of the seat 90 on which the airbag 20 is disposed is the upper part of the seat back 91. The upper end portion of the seat 90 to which the one end 31 of the strap 30 is attached is the center portion in the left-right direction of the upper end portion of the seat back 91 or the vehicle outer side portion (preferably the vehicle outer side portion from the headrest stay 94 outside the vehicle). A lower portion of the seat 90 to which the other end 32 of the strap 30 is attached is a vehicle inner side portion (a vehicle left-right direction inner side portion) of the seat cushion 92.

  In the airbag deployment state, the airbag 20 is deployed and inflated above the shoulder of the occupant J on the vehicle lateral direction inside the occupant J's head and on the vehicle lateral direction inside of the occupant J. In the airbag deployment state, the strap portion 34 passes through the rear of the neck of the occupant J and above the shoulder of the occupant J from the vehicle outer side than the headrest stay 94 at the upper part of the seat, and passes through the shoulder of the occupant. The strap 35 extends from the front end 21 of the airbag in a deployed state, from the front of the shoulder on the inside of the vehicle of the occupant J, to the front side of the occupant on the vehicle inner side, and extends to the front end 21. Extends to the inner side.

An operation and effect peculiar to the second embodiment of the present invention will be described.
In the occupant restraint device 10 according to the second embodiment of the present invention, since the airbag 20 is disposed on the upper portion of the seat back 91, the airbag 20 can be reliably deployed on the vehicle inner side of the occupant head. In the event of a collision and / or vehicle rollover, the passenger head can be protected.

  Further, since the other end 32 of the strap 30 is attached to the vehicle inner side portion of the seat cushion 92, the strap 35 is attached to the region between the chest of the passenger and the waist as compared with the case where the other end 32 of the strap 30 is attached to the seat back 91. Therefore, even when the occupant moves obliquely forward, it can be restrained, and the protection area (protection range) of the occupant can be increased.

[Third Embodiment] FIGS. 14 to 22
In the description of the first embodiment of the present invention, the configurations, operations, and effect portions that are commonly applied to all the embodiments of the present invention are also applied to the third embodiment of the present invention. Hereinafter, only the configuration, operation, and effect unique to the third embodiment of the present invention will be described.

A configuration unique to the third embodiment of the present invention will be described.
In the passenger restraint apparatus 10 according to the third embodiment of the present invention, the upper portion of the seat 90 on which the airbag 20 is disposed is a headrest 93. The airbag 20 is folded and stored in the headrest 93 when the airbag is not deployed, and is deployed and inflated from the headrest to the vehicle inner side of the occupant's head when the airbag is deployed. The upper end portion of the seat 90 to which the one end 31 of the strap 30 is attached is the center portion in the left-right direction of the upper portion of the headrest 93 or the vehicle outer side portion thereof (preferably, the front end and the upper end of the headrest). The lower part of the seat 90 to which the seat is attached is one of the vehicle inner part at the lower part of the seat back 91 and the vehicle inner part of the seat cushion 92 (the illustrated example shows the case of the vehicle inner part at the lower part of the seat back 91). . The strap 30 is stored with an extra length in the seat 90 (one or more of the headrest 93, the seat back 91, and the seat cushion 92) when the airbag is not deployed, and is pulled to the airbag 20 when the airbag is deployed. As a result, the seam of the sheet 90 is broken, and the sheet 90 is pulled out of the sheet and is tensioned.

  Deployment and inflation of the airbag 20 are set as follows. That is, from the initial deployment of the airbag 20 to the middle of deployment, the airbag 20 is deployed from the vehicle inner end of the headrest 93 toward the vehicle front obliquely upward as shown in FIGS. The strap portion 34 is passed over the head of the occupant J from behind the head to the front of the head (so as not to interfere with the head). When the airbag 20 is fully deployed and inflated, as shown in FIGS. 17 to 19, the airbag 20 has the strap portion 34 of the strap 30 positioned in front of the face of the occupant J so as not to interfere with the face. To. This avoids interference between the strap 30 and the head and face of the occupant J when the airbag 20 is deployed and inflated.

  In the undeployed state of the airbag 20, the strap 30 passes through the upper portion of the headrest 93 and the inside of the front portion to reach the vehicle inner end portion from the vehicle outer end portion of the headrest 93. 91 to the upper end portion of the seat back 91, through the inside of the upper end portion of the seat back 91, to the vehicle inner end of the seat back 91, where it bends downward and has a surplus length in the middle of the seat back 91 in the height direction. It leads to the strap anchor. When the airbag is deployed, the strap 30 is pulled by the airbag 20 and breaks the seam of the seat 90 and goes out of the seat 90.

An operation and effect peculiar to the third embodiment of the present invention will be described.
In the occupant restraint device 10 according to the third embodiment of the present invention, since the airbag 20 is disposed on the headrest 93 when the airbag 20 is not deployed, the airbag 20 can be reliably deployed on the vehicle inner side of the occupant head. The passenger head can be protected in a side collision and / or in a vehicle rollover.

  Further, since one end 31 of the strap 30 is attached to the headrest 93 and the intermediate portion 33 of the strap 30 is attached to a portion that becomes the tip portion 21 when the airbag 20 is deployed, the airbag 20 is deployed upward during deployment. By taking the form, the strap 30 can easily cross the upper part of the occupant head from the rear to the front while the airbag is deployed. This prevents the strap 30 from hitting the head of the occupant when the airbag is deployed.

  The other end 32 of the strap 30 may be attached to the lower part of the seat back 91 or to the seat cushion 92. However, when attached to the lower part of the seat back 91, the lower part of the seat back 91 of the other end 32 of the strap 30 of the first embodiment. In the case where the same effect as that of attaching to the seat cushion 92 can be obtained (the strap 30 can be routed only on the seat back 91) and attached to the seat cushion 92, the other end 32 of the strap of Example 2 is attached to the seat cushion 92. The same effect as the effect (the passenger's protection area (protection range) can be expanded further forward of the vehicle) is obtained.

It is a front view of an air bag deployment state of a crew member restraint device of Example 1 of the present invention. It is a side view of an air bag deployment state of a crew member restraint device of Example 1 of the present invention. It is a top view of the air bag deployment state of the crew member restraint device of Example 1 of the present invention. It is an expansion perspective view of an air bag deployment state of an air bag neighborhood part of an occupant restraint device of Example 1 of the present invention. It is a front view of the passenger | crew restraint apparatus of Example 1 of this invention of an airbag non-deployment state. It is a side view of the passenger | crew restraint apparatus of Example 1 of this invention of an airbag non-deployment state. It is a top view of the passenger | crew restraint apparatus of Example 1 of this invention of an airbag non-deployment state. It is a front view of the airbag deployment state of the passenger | crew restraint apparatus of Example 2 of this invention. It is a side view of an air bag deployment state of an occupant restraint device of Example 2 of the present invention. It is a top view of the airbag deployment state of the passenger | crew restraint apparatus of Example 2 of this invention. It is a front view of the passenger | crew restraint apparatus of Example 2 of this invention of an airbag non-deployment state. It is a side view of the passenger | crew restraint apparatus of Example 2 of this invention of an airbag non-deployment state. It is a top view of the passenger | crew restraint apparatus of Example 2 of this invention of an airbag non-deployment state. It is a front view of the passenger | crew restraint apparatus of Example 3 of this invention in the middle of airbag deployment. It is a side view of the passenger | crew restraint apparatus of Example 3 of this invention in the middle of airbag deployment. It is a top view of the passenger | crew restraint apparatus of Example 3 of this invention in the middle of airbag deployment. It is a front view of the air bag deployment completion state of the passenger | crew restraint apparatus of Example 3 of this invention. It is a side view of the airbag deployment completion state of the passenger | crew restraint apparatus of Example 3 of this invention. It is a top view of the airbag deployment completion state of the passenger | crew restraint apparatus of Example 3 of this invention. It is a front view of the passenger | crew restraint apparatus of Example 3 of this invention of an airbag non-deployment state. It is a side view of the passenger | crew restraint apparatus of Example 3 of this invention of an airbag non-deployment state. It is a top view of the passenger | crew restraint apparatus of Example 3 of this invention of an airbag non-deployment state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Three-point seatbelt apparatus 2 Shoulder belt 3 Lap belt 4 Tongue 5 Buckle 6 Retractor 7 Wire or belt 8 Anchor 9 Slip joint 10 Passenger restraint apparatus 20 Airbag 21 Tip part 22 Base end part 23 Inflator 24 Inner door 25 Slip ring 30 Strap 31 One end 32 The other end 33 Intermediate portion 34 A strap portion 35 between one end of the strap and an intermediate portion attached to the tip of the airbag 35 A strap portion between the other end of the strap and an intermediate portion attached to the tip of the airbag 90 Seat 91 Seat back 92 Seat cushion 93 Headrest 94 Headrest stay J Crew

Claims (4)

An airbag which is arranged inside the upper part of the seat and which is deployed to the vehicle inner side of the occupant head;
A strap with one end attached to the upper end of the seat, the other end attached to the lower portion of the seat, and an intermediate portion attached to a portion that becomes the tip when the airbag is deployed;
An occupant restraint device.   The upper part of the seat where the airbag is disposed is the upper part of the seat back, and the upper end part of the seat to which the one end of the strap is attached is the center part in the left-right direction of the upper part of the seat back or the vehicle outer side. The occupant restraint device according to claim 1, wherein the lower part of the seat to which the other end is attached is a vehicle inner part of the lower part of the seat back.   The upper part of the seat where the airbag is disposed is an upper part of the seat back, and the upper end of the seat to which the one end of the strap is attached is the center part in the left-right direction of the upper end of the seat back or the vehicle outer side. The occupant restraint device according to claim 1, wherein the lower portion of the seat to which the other end is attached is a vehicle inner side portion of a seat cushion.   The upper part of the seat on which the airbag is disposed is a headrest, and the upper end part of the seat to which the one end of the strap is attached is the center part in the left-right direction of the upper part of the headrest or the vehicle outer side, and the other end of the strap is The occupant restraint device according to claim 1, wherein the seat lower portion to be attached is one of a vehicle inner side portion of a seat back lower portion and a vehicle inner portion of a seat cushion.

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