JP2021175650A - Passenger protection device for vehicle - Google Patents

Abstract

To solve a problem in that there is room for improvement in an occupant protection device provided in a vehicle.SOLUTION: An occupant protection device 10 for a vehicle 1 has: a left bag body 21 and a right bag body 22 that are respectively provided on both left and right sides of at least a back part 6 of a seat 4 of the vehicle 1 and that can be inflated along the upper body of an occupant seated on the seat 4; an inflator 23 that inflates the right bag body 21 and the left bag body 22; an upper fixing member 7 to which the upper end of the right bag body 21 and the upper end of the left bag body 22 are fixed; and an upper movable mechanism 24 that moves the upper fixing member 7 upward along the back part 6 of the seat 4.SELECTED DRAWING: Figure 8

Description

The present invention relates to a vehicle occupant protection device.

In vehicles such as automobiles, seatbelt devices and airbag devices are used to protect the occupants on board (Patent Document 1).
The seatbelt is hung in front of the occupant's upper body to restrain the occupant seated on the seat from being displaced from the seat. The airbag device deploys around the occupant seated in the seat and absorbs large impacts that may act on the occupant displaced from the seated position of the seat. By using these occupant protection devices, the vehicle can protect the occupants on board.

Japanese Unexamined Patent Publication No. 2017-178148

However, seat belts, for example, locally constrain the occupants. Therefore, even if the occupant can be protected from a large impact, it cannot be said that there is a possibility that the occupant will be locally burdened.
In addition, the bag body can appropriately absorb the impact for the collision form assumed by the bag body, but it is not always possible to appropriately absorb the impact for the collision form different from the assumed one. .. For example, it is difficult for a bag body deployed in front of an occupant seated on a seat to properly absorb an impact on the displacement of the occupant who falls laterally due to a side collision from the seated position. For this reason, in the vehicle, a plurality of airbag devices corresponding to each collision mode are provided around the seat.
In addition, the bag body is deployed at a position slightly away from, for example, the upper body of the occupant in the seating position of the seat so as not to correspond to the body shapes of various occupants. The unfolded bag begins to function to absorb the impact after the occupant's, for example, upper body has clearly moved. In this case, the deployed bag needs to absorb a large impact on, for example, the upper body of an occupant who has already begun to move.

There is room for improvement in the occupant protection device provided in the vehicle in this way.

The vehicle occupant protection device according to the present invention includes a right bag body and a left bag body that are provided at least along the left and right sides of the back of the vehicle seat and can be deployed along the upper body of the occupant seated on the seat. , The inflator that deploys the right bag body and the left bag body, the upper fixing member that fixes the upper end of the right bag body and the upper end of the left bag body, and the upper fixing member along the back of the seat. It has an upper movable mechanism that can be moved upward.

Preferably, the right bag body and the left bag body can be brought into close contact with the upper body of the occupant seated on the seat by moving the upper fixing member upward.

Preferably, the lower end of the right bag body and the lower end of the left bag body are fixed to the left and right side portions of the seat portion of the seat.

Preferably, the upper fixing member is a headrest provided on the back of the seat, and the right bag body and the left bag body are formed in the left-right direction of the seat by moving the upper fixing member upward. It is good to go to the center of.

Preferably, the upper movable mechanism moves the upper fixing member upward in the case of a side collision, lower than in the case of a front collision.

Preferably, a lower fixing member provided on the seat portion of the seat and fixing the lower end of the right bag body and the lower end of the left bag body and the lower fixing member are placed along the seat portion of the seat in front. It has a lower movable mechanism that can be moved forward, and the lower movable mechanism moves the lower fixing member forward in the case of a front collision and does not move the lower fixing member forward in the case of a side collision. It is good.

Preferably, the right bag body and the left bag body start to deploy from the back portion of the seat toward the oblique front direction that spreads forward, or toward both the left and right sides of the seat.

Preferably, the right bag body and the right bag body are provided on the sheet in a rolled state, and can be moved forward on both the left and right sides of the sheet by the force of unfolding.

Preferably, the upper movable mechanism moves the upper fixing member after the right bag body and the left bag body start to deploy.

Preferably, the upper movable mechanism moves the upper fixing member after the deployment completion timing at which the right bag body and the left bag body can move in front of the occupant seated on the seat. It is good.

In the present invention, a right bag body and a left bag body are provided at least along the left and right sides of the back of the vehicle seat. Then, by being deployed by the inflator, the right bag body and the left bag body can be deployed along the upper body of the occupant seated on the seat. By deploying the bag in this way, the occupant seated in the seat can be restrained so as to be maintained in that state even in a frontal collision, for example. In addition, when the left and right bag bodies hold down the front surface of the occupant's upper body, the seat belt on the front surface of the occupant exerts a force to restrain the occupant, unlike the case where the occupant is protected by the seat belt. It becomes difficult for a strong force to act locally on the part that hits. It is possible to reduce the possibility of a strong force acting locally.
Moreover, in the present invention, the upper end of the right bag body and the upper end of the left bag body are fixed to the upper end fixing member, and the upper end movable mechanism moves the upper end fixing member upward along the back portion of the seat. As a result, for example, the right and left bag bodies that are deployed apart in front of the occupant's upper body are pulled toward the seat. By being pulled, the right bag body and the left bag body can be brought into close contact with the upper body of the occupant seated on the seat regardless of their physique. The occupant seated on the seat is pressed against the seat by the right bag body and the left bag body, and becomes difficult to move from the seated state.
Due to these actions, the present invention can realize high occupant protection in various collisions. For example, not only in a frontal collision but also in an oblique collision or an offset collision, the right bag body and the left bag body can restrain the occupant so as not to be easily displaced from the seating position of the seat. Moreover, since the occupant is restrained by the right bag body and the left bag body, it may be difficult to apply a strong force locally to the occupant like a seat belt. Further, since the right bag body and the left bag body are deployed so as to be preferably in close contact with each other near the upper body of the occupant in the seating position of the seat, before the upper body of the occupant clearly moves, It can function to begin to absorb the impact. The swing of the occupant's upper body itself can be suitably suppressed.

FIG. 1 is an explanatory diagram of an automobile according to the first embodiment of the present invention. FIG. 2 is an explanatory view of a basic right bag body and left bag body deployed state of the occupant protection device that can be provided in the automobile of FIG. FIG. 3 is an explanatory diagram of a control system of the occupant protection device provided in the automobile of FIG. FIG. 4 is a flowchart showing a flow of occupant protection processing by the control unit of FIG. FIG. 5 is an explanatory view of a right bag body and a left bag body of the occupant protection device according to the first embodiment of the present invention in a seated state. FIG. 6 is an explanatory diagram of a method of deploying the right bag body and the left bag body of FIG. FIG. 7 is an explanatory diagram of a deployment method following FIG. FIG. 8 is a schematic explanatory view of the drive mechanism of FIG. FIG. 9 is an explanatory view of the unfolded state of the right bag body and the left bag body after the operation of FIG. FIG. 10 is an explanatory view of a first modification of the upper movable mechanism for moving the headrest upward. FIG. 11 is an explanatory view of a second modification of the upper movable mechanism for moving the headrest upward. FIG. 12 is an explanatory diagram of a movable state of a headrest in an automobile according to a second embodiment of the present invention. FIG. 13 is an explanatory diagram of a movable mechanism in an automobile according to a third embodiment of the present invention. FIG. 14 is an explanatory view of a modified example of the method of deploying the right bag body and the left bag body of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is an explanatory diagram of an automobile 1 according to the first embodiment of the present invention. The automobile 1 is an example of a vehicle. Vehicles also include, for example, public transport buses, trains, personal personal mobility, and gantry devices for carrying personal mobility. The automobile 1 may be one that can be manually driven or automatically driven.
FIG. 1A is a schematic side view of the automobile 1. FIG. 1 (B) is a top view of the automobile 1 of FIG. 1 (A). FIG. 1 shows an occupant riding in the automobile 1 together with the automobile 1.
The automobile 1 has a vehicle body 2. The vehicle body 2 has a passenger compartment 3 in which a plurality of seats 4 are arranged facing forward. The seat 4 has a seat portion 5 and a back portion 6 that stands up from the trailing edge of the seat portion 5. The occupant rests his / her waist and thighs on the seat 5, and sits on the seat 4 with the back of his / her upper body against the back 6.

In such an automobile 1, a seatbelt device and an airbag device are used to protect the occupants on board.
The seatbelt device has a seatbelt that is hung in front of the upper body of the occupant seated on the seat 4. The seat belt restrains the occupant on the seat 4 so that the occupant seated on the seat 4 does not deviate from the seat 4 and is not displaced in the event of a collision.
The airbag device has a bag body that deploys around an occupant seated on the seat 4. The bag body is deployed, for example, on the front side of the sheet 4. The upper body of the occupant falls forward, for example, from the seating position on which the seat 4 is backed in the event of a collision, but the impact is absorbed by hitting the unfolded bag body. It can absorb the impact that acts on the occupants.
With these seatbelt devices and airbag devices, the automobile 1 can protect the occupants on board.
However, seat belts, for example, locally constrain the occupant's chest. Therefore, it cannot be said that there is a possibility that a local load is applied to the chest of the occupant when a large impact is input.
Further, the bag body can be deployed at an appropriate position and timing for the collision form assumed by the bag body to absorb the impact, but can appropriately absorb the impact for the collision form different from the assumed one. Not necessarily. For example, the bag body deployed in front of the occupant seated on the seat 4 cannot absorb the impact on the displacement of the seat 4 in the vehicle width direction from the seating position of the occupant who falls laterally due to a side collision. difficult. Therefore, in the automobile 1, a plurality of airbag devices corresponding to a plurality of collision modes are provided around the seat 4. A large number of airbag devices corresponding to the collision mode will be provided around the seat 4. In this case, the structure and control of the device for protecting the occupants is complicated.
As described above, the occupant protection device 10 is required to be further improved.

FIG. 2 is an explanatory diagram of a basic right bag body 21 and left bag body 22 of the occupant protection device 10 that can be provided in the automobile 1 of FIG. FIG. 2 illustrates the basic principle of occupant protection by the right bag body 21 and the left bag body 22.

The right bag body 21 of FIG. 2 is expanded by the inflow of high-pressure gas from the inflator 23. The right bag body 21 is developed so as to project forward from the upper right portion of the back portion 6 of the seat 4 and further project downward. In this case, the right bag body 21 is deployed in front of the back portion 6 of the seat 4 and is deployed in a substantially rod shape along the upper body of the occupant seated on the seat 4.

The left bag body 22 is deployed by the inflow of high-pressure gas from the inflator 23. The left bag body 22 is developed so as to project forward from the upper left portion of the back portion 6 of the seat 4 and further project downward. In this case, the left bag body 22 is deployed in front of the back portion 6 of the seat 4 and is deployed in a substantially rod shape along the upper body of the occupant seated on the seat 4.

In this way, the right bag body 21 and the left bag body 22 provided on the seat 4 of the automobile 1 are above the left and right shoulders of the occupant seated on the seat 4 from the upper left and right sides of the back 6 of the seat 4 by the inflator 23. It is deployed separately to the front of the occupant's upper body through. The upper body of the occupant seated on the seat 4 is suppressed by the right bag body 21 and the left bag body 22 which are in close contact with the entire surface thereof, and can be maintained in that state in the event of a collision. The deployed right bag body 21 and left bag body 22 seat the occupant on the seat 4 not only when the impact is input to the automobile 1 from the front direction but also when the impact is input from the oblique front direction. Can be restrained to remain in a state. Further, the front surface of the upper body of the occupant is suppressed by the deployed right bag body 21 and the left bag body 22. In the deployed right bag body 21 and left bag body 22, the force for restraining the occupant acts locally on a part of the front surface of the upper body as compared with the case where the seat belt restrains the front surface of the upper body of the occupant. It becomes difficult.
In the present embodiment, the occupant protection device 10 that can be expected to have such an effect practically will be described.

FIG. 3 is an explanatory diagram of a control system of the occupant protection device 10 provided in the automobile 1 of FIG.
The occupant protection device 10 of FIG. 3 includes a stereo camera 11, an infrared camera 12, a LiDAR 13, an acceleration sensor 14, a communication device 15, a GPS receiver 16, and an airbag device 17. The airbag device 17 includes a right bag body 21, a left bag body 22, an inflator 23, an upper movable mechanism 24, a lower movable mechanism 42, and a control unit 27 to which these are connected. Each sensor and each device of the occupant protection device 10 may be connected to the control unit 27 by a vehicle network (not shown) provided in the automobile 1.

The stereo camera 11 is arranged forward, for example, in the front part of the passenger compartment 3. The stereo camera 11 has a plurality of imaging devices arranged in the vehicle width direction. The stereo camera 11 captures a person outside the vehicle imaged by a plurality of imaging devices. The stereo camera 11 may calculate the direction and distance of the imaged person outside the vehicle with respect to the vehicle body 2. The stereo camera 11 may calculate the direction and distance of the subject by, for example, trigonometry, based on the position of a person outside the vehicle who is the subject in the images captured by the plurality of imaging devices. The stereo camera 11 may also calculate whether or not the subject is moving, the moving direction, the moving speed, and the like based on the change in the position in the images captured at different times.
The infrared camera 12 is arranged forward in the front part of the passenger compartment 3 like the stereo camera 11, for example. The infrared camera 12 captures an infrared image of a person outside the vehicle, another moving body, or the like.
The LiDAR 13 is arranged forward, for example, in the front part of the vehicle body 2. The LiDAR 13 irradiates light toward the front and acquires the direction, distance, speed, and the like of the subject based on the reflected light by a person outside the vehicle in front of the vehicle body 2.
The acceleration sensor 14 is provided on the vehicle body 2. The acceleration acting on the acceleration sensor 14 is detected. When the vehicle body 2 hits a moving object such as a person, the acceleration sensor 14 detects a large acceleration that does not occur in normal driving. In this case, the acceleration sensor 14 may output the collision detection. In this case, the acceleration sensor 14 functions as a collision detection unit that predicts or detects contact between the vehicle body 2 and another moving object.
The communication device 15 communicates with other mobile bodies, for example, other communication devices of other automobiles and pedestrians, base stations arranged along the road, and the like by wireless communication. The communication device 15 may acquire the current position, movement direction, movement speed, and the like of another moving body from another communication device.
The GPS receiver 16 receives radio waves from GPS satellites and the like, and acquires the current position, moving speed, and the like of the own vehicle.

The right bag body 21 and the left bag body 22 of the airbag device 17 may be formed on a smooth surface by, for example, nylon or other resin fibers. The right bag body 21 and the left bag body 22 may be a bag body that can be expanded into a bent substantially rod shape as described later.

The inflator 23 is connected to the right bag body 21 and the left bag body 22. The inflator 23 generates high-pressure gas by the ignition signal and supplies it to the right bag body 21 and the left bag body 22.

The upper movable mechanism 24 is provided on the back portion 6 of the seat 4, and although details will be described later, the headrest 7 as an upper fixing member for fixing the upper end of the right bag body 21 and the upper end of the left bag body 22 which can be deployed in a substantially rod shape. Is moved upward on the upper side of the back portion 6 of the seat 4. In the present embodiment, the upper fixing member is the headrest 7, but it may be, for example, a pop-up roll bar that rises when the vehicle rolls over, which is mounted on an open car or the like. Further, the upper end of the right bag body 21 and the upper end of the left bag body 22 may be fixed to the headrest 7 in a form in which they are not completely fixed and are only engaged. Further, for example, the right bag body 21 and the left bag body 22 may communicate with each other at the upper end, and the communicating portion may be engaged with the headrest 7.
The upper movable mechanism 24 may be, for example, an actuator that drives the headrest 7 upward. The headrest 7 is provided on the back portion 6 of the seat 4 so that the vertical position can be adjusted. Further, the upper fixing member for fixing the upper end of the right bag body 21 and the upper end of the left bag body 22 may be provided so as to be movable upward on the back portion 6 of the seat 4 separately from the headrest 7.

The lower movable mechanism 42 is provided on the seat portion 5 of the seat 4, and the lower end of the right bag body 21 and the lower end of the left bag body 22 that can be deployed in a substantially rod shape are fixed, which will be described in detail in the third embodiment. The lower fixing member 41 is moved forward inside the seat portion 5 of the seat 4. The lower movable mechanism 42 may be, for example, an actuator that drives the lower fixing member 41 forward.

The control unit 27 is, for example, a CPU (Central Processing Unit) or an ECU (Electronic Control Unit). The control unit 27 may be provided in the automobile 1 as a dedicated CPU for the airbag device 17, or may be provided in the automobile 1 as a CPU common to various protective devices provided in the automobile 1. The CPU reads and executes a program from a storage such as a ROM (Read Only Memory). As a result, the CPU functions as a control unit 27 of the airbag device 17. The control unit 27 of the airbag device 17 determines the possibility of a collision with respect to the automobile 1 based on the detection information from the collision detection units such as the stereo camera 11, the infrared camera 12, the LiDAR 13, the acceleration sensor 14, and the communication device 15. , Detect collisions. The CPU outputs an ignition signal to the inflator 23 based on the determination or the detected collision, and operates the upper movable mechanism 24 and the lower movable mechanism 42. As a result, the airbag device 17 executes occupant protection by the deployed right bag body 21 and left bag body 22.

FIG. 4 is a flowchart showing a flow of occupant protection processing by the control unit 27 of FIG.
The CPU as the control unit 27 repeatedly executes the process of FIG. 4, for example, when the vehicle 1 is running or when an occupant is in the vehicle 1.

In step ST1, the CPU determines the detection of the collision. When the contact between the vehicle body 2 and another moving body is not predicted or detected, the CPU repeats this process. When the contact between the vehicle body 2 and another moving body is predicted or detected, the CPU proceeds to step ST2, assuming that a collision has been detected.

In step ST2, the CPU deploys the airbag device 17. The CPU outputs an ignition signal to the inflator 23. As a result, the right bag body 21 and the left bag body 22 of the airbag device 17 start to deploy.

In step ST3, the CPU determines the completion of deployment as the deployment state of the airbag device 17. The CPU may determine the completion of deployment based on, for example, whether or not the elapsed time after outputting the ignition signal to the inflator 23 is equal to or longer than the deployment time of the right bag body 21 and the left bag body 22. In addition to this, for example, the CPU may detect the unfolded state of the right bag body 21 and the left bag body 22 to determine the completion of unfolding. In this process, the completion of unfolding may be the timing at which the right bag body 21 and the left bag body 22 are unfolded to the maximum, but may be the timing immediately before that.

In step ST4, the CPU operates the upper movable mechanism 24 and the lower movable mechanism 42. For example, the upper movable mechanism 24 moves the headrest 7 upward on the upper side of the back portion 6 of the seat 4. In this way, the upper movable mechanism 24 and the lower movable mechanism 42 have a right bag body after the timing of determining the completion of deployment in which the right bag body 21 and the left bag body 22 can move in front of the occupant seated on the seat 4. The headrest 7 and the lower fixing member 41 to which the 21 and the left bag body 22 are fixed are moved. The upper movable mechanism 24 and the lower movable mechanism 42 move the headrest 7 and the lower fixing member 41 at the earliest after the timing when the right bag body 21 and the left bag body 22 start to deploy.
As a result, the CPU as the control unit 27 can deploy the right bag body 21 and the left bag body 22 of the occupant protection device 10 when the collision of the automobile 1 is detected or predicted.

Next, the right bag body 21 and the left bag body 22 developed by the process of FIG. 4 will be described.
FIG. 5 is an explanatory view of a right bag body 21 and a left bag body 22 of the occupant protection device 10 according to the first embodiment of the present invention in a state of being housed in the seat 4.
FIG. 5A is a front view of the seat 4. FIG. 5B is a side view of the seat 4. FIG. 5C is a top view of the sheet 4.
A headrest 7 is provided on the upper side of the back portion 6 of the seat 4.

As shown in FIG. 5, the right bag body 21 of the present embodiment is a long bag body that can be expanded into a substantially rod shape. The upper end of the elongated right bag 21 is fixed to the headrest 7 located on the back 6 of the seat 4, and the lower end is fixed to the right front side of the seat 5 of the seat 4. The right bag body 21 is embedded along the right edge portion of the seat 4 so as to reach the seat portion 5 from the headrest 7 of the seat 4 through the back portion 6. The left bag body 22 is a long bag body that can be expanded into a substantially rod shape. The upper end of the elongated left bag body 22 is fixed to the headrest 7 located above the back portion 6 of the seat 4, and the lower end is fixed to the left front side portion of the seat portion 5 of the seat 4. The left bag body 22 is embedded along the left edge portion of the seat 4 from the headrest 7 of the seat 4 to the seat portion 5 through the back portion 6.

Then, the right bag body 21 and the left bag body 22 break the seat cover forming the surface of the seat 4 due to the pressure at the time of deployment, and project out of the seat 4. The right bag body 21 and the left bag body 22 projecting out of the seat 4 can be expanded from the seat 4 to the left and right. The right bag body 21 developed from the seat 4 to the right can be extended so as to extend from the headrest 7 on the back portion 6 of the seat 4 to the right side portion of the seat portion 5 of the seat 4. The left bag body 22 unfolded from the seat 4 to the left can be unfolded so as to extend from the headrest 7 on the seat 4 to the left side portion of the seat portion 5 of the seat 4.

However, when the right bag body 21 is embedded along the right edge portion of the seat 4 from the back portion 6 to the seat portion 5 of the seat 4 in this way, the right side after breaking the seat cover and protruding to the outside of the seat 4. The length of the bag body 21 is longer than the straight line distance from the upper right portion of the back portion 6 of the seat 4 to which both ends of the right bag body 21 are fixed to the right front portion of the seat portion 5. The right bag 21 will be deployed with a length longer than the linear distance between the two fixed points. For this reason, the right bag body 21 bends and unfolds simply by unfolding, and it is difficult for the right bag body 21 to come into close contact with and restrain the occupant as shown in FIG.
Similarly, when the left bag body 22 is embedded along the left edge portion of the seat 4 from the back portion 6 to the seat portion 5 of the seat 4, the left bag body after breaking the seat cover and protruding to the outside of the seat 4 The length of 22 is longer than the straight line distance from the upper left portion of the back portion 6 of the seat 4 to which both ends of the left bag body 22 are fixed to the left front portion of the seat portion 5. The left bag body 22 is deployed with a length longer than the linear distance between the two fixed points. For this reason, the left bag body 22 bends and unfolds simply by unfolding, and it is difficult for the left bag body 22 to come into close contact with and restrain the occupant as shown in FIG.
Then, the right bag body 21 and the left bag body 22 that are deployed while being bent on the left and right sides of the occupant are deployed so as to be in close contact with the front surface of the occupant seated on the seat 4 and both the left and right shoulders. hard.

FIG. 6 is an explanatory view of a method of deploying the right bag body 21 and the left bag body 22 of FIG.
FIG. 7 is an explanatory diagram of a deployment method following FIG.

FIG. 6A shows the accommodation state of the right bag body 21 and the left bag body 22 before the start of deployment. The right bag body 21 and the left bag body 22, which are long bag bodies that can be expanded into a substantially rod shape, are housed in the sheet 4 with their upper parts rolled up. Specifically, the right bag body 21 is wound clockwise, and the left bag body 22 is wound counterclockwise. In this way, the right bag body 21 and the left bag body 22 are provided on the sheet 4 in a state of being wound in the rear winding. When the inflator 23 ejects the high-pressure gas, the right bag body 21 and the left bag body 22 start to deploy. The right bag body 21 and the left bag body 22 start to be unfolded so as to spread to the left and right while unwinding.

FIG. 6B shows a state in which the right bag body 21 and the left bag body 22 have started unfolding and are unfolding by breaking the right edge and the left edge of the sheet 4. The right bag body 21 and the left bag body 22, which have started to expand to the left and right while unwinding the respective windings, break the right and left edges of the sheet 4 and expand to the left and right.

FIG. 6C is a state in which the right bag body 21 and the left bag body 22 are largely expanded on the right side and the left side of the sheet 4 by further expanding from FIG. 6B. As shown in FIG. 6C, the right bag body 21 and the left bag body 22 project to the left and right from the right edge and the left edge of the seat 4 and spread in the vehicle width direction. In this expanded state, the right bag body 21 and the left bag body 22 are unwound. In the unwound right bag body 21, a counterclockwise inertia acts when unwinding. In the unwound left bag body 22, a clockwise inertia at the time of unwinding acts. In this way, the right bag body 21 and the left bag body 22 start to expand from the back portion 6 of the seat 4 toward the diagonally forward direction so as to spread forward, or toward both the left and right sides of the seat 4. Become.

FIG. 7 (A) is a state in which the right bag body 21 and the left bag body 22 are further developed from FIG. 6 (C) and are expanded to the front side of the seat 4 due to the inertial force at the time of deployment. The unwound right bag body 21 moves forward due to the counterclockwise inertial force. The unwound left bag body 22 moves forward due to a clockwise inertial force.

7 (B) is further expanded from FIG. 7 (A), and the right bag body 21 and the left bag body 22 are placed in front of the upper body of the occupant seated on the seat 4 due to the inertial force at the time of deployment. It is in a deployed state. The right bag body 21 that has moved forward moves to the left on the front side of the occupant due to the counterclockwise inertial force. The left bag body 22 that has moved forward moves to the right on the front side of the occupant due to the clockwise inertial force.
The right bag body 21 and the left bag body 22 provided on the seat 4 in the state of being wound backward in this way move in front of the upper body of the seated occupant on both the left and right sides of the seat 4 due to the momentum of unfolding. ..
Further, by flexing and deploying, the right bag body 21 and the left bag body 22 are not hindered by the upper body of the occupant seated on the seat 4 and the forward movement of the occupant is not hindered. You can move to the front of your upper body.
However, since the right bag body 21 and the left bag body 22 are still in a bent state at this stage, it is difficult to restrain the upper body of the occupant seated on the seat 4.

FIG. 8 is a schematic explanatory view of the drive mechanism of FIG.
As shown in the side view of FIG. 8A, the upper end of the right bag body 21 is fixed to the headrest 7 that can move upward on the upper side of the back portion 6 of the seat 4, and the lower end is fixed to the seat portion 5 of the seat 4. It is fixed. The same applies to the left bag body 22.
The upper movable mechanism 24 is provided on the back portion 6 of the seat 4 so that the height position of the headrest 7 can be adjusted.
Then, the upper movable mechanism 24 drives the headrest 7 upward after the right bag body 21 and the left bag body 22 that have begun to bend and deploy move in front of the upper body of the occupant seated on the seat 4.
As a result, as shown in the side view of FIG. 8B, the right bag body 21 and the left bag are deployed so as to move forward from the upper body of the occupant seated on the seat 4 in a bent state. The upper ends of the body 22 rise up together with the headrest 7. The right bag body 21 and the left bag body 22 are extended so as to approach a straight line between both ends thereof, and can be flexed so as to be in close contact with the front surface of the upper body of the occupant seated on the seat 4. For example, when the distance between both ends of the right bag body 21 becomes equal to the unfolded length of the right bag body 21, the right bag body 21 can extend linearly. The same applies to the left bag body 22.

FIG. 9 is an explanatory view of the unfolded state of the right bag body 21 and the left bag body 22 after the operation of FIG.
FIG. 9A is a front view. FIG. 9B is a top view. In FIG. 9, the deployed right bag body 21 and the left bag body 22 are in close contact with the front surface of the upper body of the occupant seated on the seat 4 as in FIG. 8 (B). The right bag body 21 and the left bag body 22 that start unfolding in a bent state due to starting unfolding at a length longer than the linear distance between the two fixed points at both ends are shown in FIGS. 6 to 7. As shown, the seat 4 can be moved to the front side of the seated occupant while being bent, and finally, as shown in FIGS. 8 and 9, the headrest 7 is raised and stretched so as to approach a straight line. It can be deployed so as to come into close contact with the front surface of the upper body and both shoulders of the occupant seated on the seat 4. The right bag body 21 and the left bag body 22 are finally deployed so as not to leave their deflections so as to be in close contact with the front surface of the upper body and both shoulders of the occupant seated on the seat 4. Can be expanded to.

In the state of FIG. 9, the right bag body 21 reaches the front of the occupant's upper body from the upper right portion of the back portion 6 of the seat 4 through the upper side of the right shoulder of the occupant seated on the seat 4 by raising the headrest 7. Expand to state. When the headrest 7 is raised, the left bag body 22 expands from the upper left portion of the back portion 6 of the seat 4 to the front of the upper body of the occupant through the upper side of the left shoulder of the occupant seated on the seat 4. The right bag body 21 and the left bag body 22 can be brought into close contact with the front surface of the upper body of the occupant seated on the seat 4 by moving the headrest 7 upward after starting the deployment. The upper body of the occupant seated on the seat 4 is restrained by the right bag body 21 and the left bag body 22 that are deployed so as to be in close contact with the seat 4, and it becomes difficult for the occupant to shift or move back and forth, up, down, left and right.
Further, the right bag body 21 and the left bag body 22 move closer to the center of the seat 4 in the left-right direction by moving the headrest 7 upward.
The upper body of the occupant restrained by the right bag body 21 and the left bag body 22 is firmly held by the right bag body 21 and the left bag body 22 extended in the center, and is held between them, for example, forward. It becomes difficult to get out.
Moreover, since the state shown in FIG. 9 occurs at the time of a side collision, the right bag body 21 and the left bag body 22 are present in the vicinity of the side of the occupant's neck, and the occupant's upper body moves to the left and right sides. It can be effectively suppressed.

As described above, in the present embodiment, the right bag body 21 and the left bag body 22 are provided at least along the left and right sides of the back portion 6 in the seat 4 of the automobile 1. Then, by being deployed by the inflator 23, the right bag body 21 and the left bag body 22 are deployed in front of the back 6 of the seat 4 and deployed in a substantially rod shape along the upper body of the occupant seated on the seat 4. It is possible to do. By deploying the bag body in this way, the occupant seated on the seat 4 can be restrained so as to be maintained in that state even in a front collision, for example. In addition, when the left and right bag bodies hold down the front surface of the occupant's upper body, the seat belt on the front surface of the occupant exerts a force to restrain the occupant, unlike the case where the occupant is protected by the seat belt. It becomes difficult for a strong force to act locally on the part that hits. It is possible to reduce the possibility of a strong force acting locally.
Moreover, in the present embodiment, the upper end of the right bag body 21 and the upper end of the left bag body 22 that can be deployed in a substantially rod shape are fixed to the headrest 7, and the upper movable mechanism 24 puts the headrest 7 on the seat 4 after starting the deployment. Move up along the back 6 of the. Further, in the present embodiment, the lower end of the right bag body 21 and the lower end of the left bag body 22 that can be deployed in a substantially rod shape are fixed to the left and right side portions of the seat portion 5 of the seat 4. As a result, for example, the right bag body 21 and the left bag body 22 that are deployed apart in front of the upper body of the occupant approach each other so as to approach the center of the seat 4 in the left-right direction by moving the headrest 7 upward. And it is pulled toward the sheet 4. By being pulled, the right bag body 21 and the left bag body 22 can be brought into close contact with the front surface of the upper body of the occupant seated on the seat 4, regardless of their physique. The occupant seated on the seat 4 is pressed against the seat 4 by the right bag body 21 and the left bag body 22, and becomes difficult to move from the seated state. It becomes difficult for the upper body and both shoulders of the occupant to come out from between the right bag body 21 and the left bag body 22 to the front.
Further, in the present embodiment, the headrest 7 is a headrest 7 provided on the back portion 6 of the seat 4, and the right bag body 21 and the left bag body 22 are left and right of the seat 4 by moving the headrest 7 upward. Move to the center of the direction. As a result, the right bag body 21 and the left bag body 22 can be brought into close contact with each other around the neck and head of the occupant. As a result, it is possible to suppress the shaking of the head when an impact is applied.
Due to these actions, in the present embodiment, high occupant protection can be realized in various collisions. For example, not only in a frontal collision but also in an oblique collision or an offset collision, the right bag body 21 and the left bag body 22 can restrain the occupant so as not to be easily displaced from the seating position of the seat 4. Moreover, since the occupant is restrained by the right bag body 21 and the left bag body 22, it may be difficult to apply a strong force locally to the occupant like a seat belt. Further, since the right bag body 21 and the left bag body 22 are deployed so as to be preferably in close contact with the upper body of the occupant at the seating position of the seat 4, the upper body of the occupant clearly moves. Before, it may function to begin to absorb the impact. The swing of the occupant's upper body itself can be suitably suppressed.

Further, in the present embodiment, the right bag body 21 and the right bag body 21 are provided on the sheet 4 in a state of being wound in the rear winding. In this case, the right bag body 21 and the right bag body 21 can move in front of the upper body of the occupant seated on both the left and right sides of the back portion 6 of the seat 4 by the momentum of unfolding. The right bag body 21 and the left bag body 22 can start to deploy from the back portion 6 of the seat 4 in the oblique forward direction so as to spread forward, or toward both the left and right sides of the seat 4. As a result, it can be deployed in front of the upper body of the occupant seated on the seat 4.

In the present embodiment, the upper movable mechanism 24 has a headrest 7 as an upper fixing member after the deployment completion timing at which the right bag body 21 and the left bag body 22 can move in front of the occupant seated on the seat 4. Is movable. The right bag body 21 and the left bag body 22 can move the headrest 7 by the upper movable mechanism 24 after the deployment is started, so that the upper body of the occupant passes above the left and right shoulders of the occupant seated on the seat 4. Move to the position that reaches the front of. As a result, the right bag body 21 and the left bag body 22 can be restrained so as to keep the occupant seated on the seat 4.

FIG. 10 is an explanatory view of a first modification of the upper movable mechanism 24 that moves the headrest 7 upward.
In FIG. 10A, the upper movable mechanism 24 for moving the headrest 7 upward has a pair of arms 31 which are provided so as to be spread to the left and right inside the back portion 6 of the seat 4. The pair of arms 31 are pushed inward by, for example, when the right bag 21 and the left bag 22 are deployed. As shown in FIG. 10B, the pair of pushed arms 31 pushes up the headrest 7 while bending inward.

FIG. 11 is an explanatory view of a second modification of the upper movable mechanism 24 that moves the headrest 7 upward.
In FIG. 11A, the pin 37 is inserted into the hole 36 formed in the headrest 7. For example, when the right bag 21 and the left bag 22 are deployed, a pin 37 connected to them by, for example, a tether (not shown) comes out of the hole 36. The headrest 7 from which the pin 37 is removed from the hole 36 is pushed upward by the elastic member 38 that is compressed and arranged below the hole 36.

Also in these modified examples, for example, after the right bag body 21 and the left bag body 22 have started to be deployed, the headrest 7 can be started to be pushed up.

[Second Embodiment]
Next, the occupant protection device 10 of the automobile 1 according to the second embodiment of the present invention will be described. In the present embodiment, the same reference numerals are used for the same configurations as those in the above-described embodiment, and illustration and description thereof will be omitted. In the following description, differences from the above-described embodiments will be mainly described.

FIG. 12 is an explanatory diagram of a movable state of the headrest 7 in the automobile 1 according to the second embodiment of the present invention.
In FIG. 12, the control unit 27 determines the collision mode. The control unit 27 determines, for example, a front collision and a side collision.

Then, in the case of a front collision, the control unit 27 operates the upper movable mechanism 24 to the maximum. In this case, the headrest 7 is greatly moved upward, and the expanded right bag body 21 and the left bag body 22 are largely pulled upward as shown in FIG. 12 (A), and the front surface of the occupant seated on the seat 4. Move so that it is in close contact with.

On the other hand, in the case of a side collision, the control unit 27 slightly operates the upper movable mechanism 24. In this case, the headrest 7 is slightly moved upward, and the unfolded right bag body 21 and left bag body 22 are slightly pulled upward as shown in FIG. 12 (B), and the occupant seats on the seat 4. Move so that it is in close contact with both the left and right sides of the.

As described above, in the present embodiment, the right bag body 21 and the left bag body 22 are provided at least along the left and right sides of the back portion 6 in the seat 4 of the automobile 1. Then, by being deployed by the inflator 23, the right bag body 21 and the left bag body 22 are deployed in front of the back 6 of the seat 4 and deployed in a substantially rod shape along the upper body of the occupant seated on the seat 4. It is possible to do. By deploying the bag body in this way, the occupant seated on the seat 4 can be restrained so as to be maintained in that state even in a front collision, for example. In addition, when the left and right bag bodies hold down the front surface of the occupant's upper body, the seat belt on the front surface of the occupant exerts a force to restrain the occupant, unlike the case where the occupant is protected by the seat belt. It becomes difficult for a strong force to act locally on the part that hits. It is possible to reduce the possibility of a strong force acting locally.
Moreover, in the present embodiment, the upper end of the right bag body 21 and the upper end of the left bag body 22 that can be deployed in a substantially rod shape are fixed to the headrest 7, and the upper movable mechanism 24 makes the headrest 7 along the back portion 6 of the seat 4. Let it move up. Further, in the present embodiment, the lower end of the right bag body 21 and the lower end of the left bag body 22 that can be deployed in a substantially rod shape are fixed to the left and right side portions of the seat portion 5 of the seat 4. As a result, for example, the right bag body 21 and the left bag body 22 that are deployed apart in front of the upper body of the occupant approach each other so as to approach the center of the seat 4 in the left-right direction by moving the headrest 7 upward. And it is pulled toward the sheet 4. By being pulled, the right bag body 21 and the left bag body 22 can be brought into close contact with the front surface of the upper body of the occupant seated on the seat 4, regardless of their physique. The occupant seated on the seat 4 is pressed against the seat 4 by the right bag body 21 and the left bag body 22, and becomes difficult to move from the seated state. It becomes difficult for the upper body and both shoulders of the occupant to come out from between the right bag body 21 and the left bag body 22 to the front.
Further, in the present embodiment, the upper movable mechanism 24 moves the headrest 7 upward in the case of a side collision, lower than in the case of a front collision. As a result, the right bag body 21 and the left bag body 22 can be located on the left and right sides of the occupant seated on the seat 4 at the time of side collision. The occupant seated on the seat 4 can be prevented from swinging with respect to the input by the side collision.
Due to these actions, in the present embodiment, high occupant protection can be realized in various collisions. For example, not only in a frontal collision, an oblique collision, and an offset collision, but also in a side collision, the right bag body 21 and the left bag body 22 can restrain the occupant so as not to be easily displaced from the seating position of the seat 4. Moreover, since the occupant is restrained by the right bag body 21 and the left bag body 22, it may be difficult to apply a strong force locally to the occupant like a seat belt. Further, since the right bag body 21 and the left bag body 22 are deployed so as to be preferably in close contact with each other near the front surface or the side surface of the upper body of the occupant at the seating position of the seat 4, the upper body of the occupant is clear. It can function to begin to absorb the impact before it moves to. The swing of the occupant's upper body itself can be suitably suppressed.

[Third Embodiment]
Next, the occupant protection device 10 of the automobile 1 according to the third embodiment of the present invention will be described. In the present embodiment, the same reference numerals are used for the same configurations as those in the above-described embodiment, and illustration and description thereof will be omitted. In the following description, differences from the above-described embodiments will be mainly described.

FIG. 13 is an explanatory diagram of a movable mechanism in the automobile 1 according to the third embodiment of the present invention.

As shown in FIG. 13A, the occupant protection device 10 of the present embodiment includes a lower fixing member 41 and a lower movable mechanism 42.
The lower fixing member 41 is provided so as to be movable forward in the seat portion 5 of the seat 4, and the lower end of the right bag body 21 and the lower end of the left bag body 22 that can be deployed in a substantially rod shape are fixed.
The lower movable mechanism 42 moves the lower fixing member 41 forward along the seat portion 5 of the seat 4.
In this case, both ends of the right bag body 21 and both ends of the left bag body 22 that can be deployed in a substantially rod shape can be moved by the lower movable mechanism 42 and the lower movable mechanism 42.

Then, the control unit 27 determines the collision form. The control unit 27 determines, for example, a front collision and a side collision.

In the case of a front collision, the control unit 27 operates the upper movable mechanism 24 and the lower movable mechanism 42 as shown in FIG. 12 (B). In this case, the headrest 7 is movable upward, and the lower fixing member 41 is movable forward. As a result, the right bag body 21 and the left bag body 22 that have been deployed in front of the upper body of the occupant seated on the seat 4 come into close contact with the front surface of the upper body of the occupant.

On the other hand, in the case of a side collision, the control unit 27 operates only the upper movable mechanism 24 as shown in FIG. 12 (C). In this case, the lower fixing member 41 does not move forward. The headrest 7 moves upward while the lower fixing member 41 is located on the left and right sides of the upper body of the occupant seated on the seat 4. The deployed right bag body 21 and left bag body 22 come into close contact with the left and right sides of the occupant sitting on the seat 4 on both the left and right sides.

As described above, in the present embodiment, the right bag body 21 and the left bag body 22 are provided at least along the left and right sides of the back portion 6 in the seat 4 of the automobile 1. Then, by being deployed by the inflator 23, the right bag body 21 and the left bag body 22 are deployed in front of the back 6 of the seat 4 and deployed in a substantially rod shape along the upper body of the occupant seated on the seat 4. It is possible to do. By deploying the bag body in this way, the occupant seated on the seat 4 can be restrained so as to be maintained in that state even in a front collision, for example. In addition, when the left and right bag bodies hold down the front surface of the occupant's upper body, the seat belt on the front surface of the occupant exerts a force to restrain the occupant, unlike the case where the occupant is protected by the seat belt. It becomes difficult for a strong force to act locally on the part that hits. It is possible to reduce the possibility of a strong force acting locally.
Moreover, in the present embodiment, the upper end of the right bag body 21 and the upper end of the left bag body 22 that can be deployed in a substantially rod shape are fixed to the headrest 7, and the upper movable mechanism 24 makes the headrest 7 along the back portion 6 of the seat 4. Let it move up. Further, in the present embodiment, the lower end of the right bag body 21 and the lower end of the left bag body 22 that can be deployed in a substantially rod shape are fixed to the lower fixing member 41 provided on the seat portion 5 of the seat 4. As a result, for example, the right bag body 21 and the left bag body 22 that are deployed apart in front of the upper body of the occupant approach each other so as to approach the center of the seat 4 in the left-right direction by moving the headrest 7 upward. And it is pulled toward the sheet 4. By being pulled, the right bag body 21 and the left bag body 22 can be brought into close contact with the front surface of the upper body of the occupant seated on the seat 4, regardless of their physique. The occupant seated on the seat 4 is pressed against the seat 4 by the right bag body 21 and the left bag body 22, and becomes difficult to move from the seated state. It becomes difficult for the upper body and both shoulders of the occupant to come out from between the right bag body 21 and the left bag body 22 to the front.
Further, in the present embodiment, the lower movable mechanism 42 that moves the lower fixing member 41 forward along the seat portion 5 of the seat 4 moves the lower fixing member 41 forward in the case of a front collision and causes a side collision. In the case of, the lower fixing member 41 is not moved forward. As a result, the right bag body 21 and the left bag body 22 can be located on the left and right sides of the occupant seated on the seat 4 at the time of side collision. The occupant seated on the seat 4 can be prevented from swinging with respect to the input by the side collision.
Due to these actions, in the present embodiment, high occupant protection can be realized in various collisions. For example, not only in a frontal collision, an oblique collision, and an offset collision, but also in a side collision, the right bag body 21 and the left bag body 22 can restrain the occupant so as not to be easily displaced from the seating position of the seat 4. Moreover, since the occupant is restrained by the right bag body 21 and the left bag body 22, it may be difficult to apply a strong force locally to the occupant like a seat belt. Further, since the right bag body 21 and the left bag body 22 are deployed so as to be preferably in close contact with each other near the front surface or the side surface of the upper body of the occupant at the seating position of the seat 4, the upper body of the occupant is clear. It can function to begin to absorb the impact before it moves to. The swing of the occupant's upper body itself can be suitably suppressed.

The above embodiments are examples of preferred embodiments of the present invention, but the present invention is not limited thereto, and various modifications or modifications can be made without departing from the gist of the invention.

For example, in the above-described embodiment, both ends of the right bag body 21 and the left bag body 22 are fixed to the upper portion of the back portion 6 of the seat 4 and the left and right side portions of the seat portion 5 of the seat 4.
In addition, for example, both ends of the right bag body 21 and the left bag body 22 may be fixed to the upper portion of the back portion 6 of the seat 4 and the left and right armrest portions of the seat 4.

In the above-described embodiment, the right bag body 21 and the left bag body 22 are independently deployed on the left and right sides of the seat 4, for example.
In addition to this, for example, the right bag body 21 and the left bag body 22 may be connected and integrated on the back portion 6 of the seat 4, for example. Even in this case, the same effect as described above can be obtained by connecting the portion where the left and right sides are connected to the headrest 7.

In the above-described embodiment, for example, in the upper movable mechanism 24 and the lower movable mechanism 42, the right bag body 21 and the left bag body 22 pass above the left and right shoulders of the occupant seated on the seat 4 and reach the front surface of the occupant. The headrest 7 and the lower fixing member 41 as the upper fixing member are movable after the unfolding completion timing at which the unfolding is completed.
In addition to this, for example, the upper movable mechanism 24 and the lower movable mechanism 42 move the headrest 7 and the lower fixing member 41 as the upper fixing member before the deployment completion timing of the right bag body 21 and the left bag body 22. The upper movable mechanism 24 and the lower movable mechanism 42 may start moving the headrest 7 and the lower fixing member 41 as the upper fixing member as long as it is after the timing when the right bag body 21 and the left bag body 22 start to deploy.

In the above-described embodiment, the right bag body 21 and the right bag body 21 are provided on the seat 4 in a state of being wound backward, and are seated on the left and right sides of the back portion 6 of the seat 4 due to the momentum of unfolding. It is moving in front of the body.
In addition to this, for example, the right bag body 21 and the right bag body 21 may be provided on the sheet 4 in a front-wound state, or may be folded in a bellows shape and provided on the sheet 4. Even in these cases, for example, if reflectors are provided on the left and right sides of the sheet 4 and the bag body is brought into contact with the reflectors to move forward, the right bag body 21 and the right bag body 21 can be moved forward. Deployment can be initiated obliquely forward from the back 6 so as to spread forward, or toward both the left and right sides of the seat 4.

FIG. 14 is an explanatory diagram of a method of deploying a modified example of the right bag body 21 and the left bag body 22 of FIG. 14 (A) to 14 (C) correspond to FIGS. 6 (A) to 6 (C).
FIG. 14A shows the accommodation state of the right bag body 21 and the left bag body 22 according to the modified example before the start of deployment. The right bag body 21 is wound counterclockwise, and the left bag body 22 is wound clockwise and housed. In this way, the right bag body 21 and the left bag body 22 are provided on the sheet 4 in a state of being wound forward. When the inflator 23 ejects the high-pressure gas, the right bag body 21 and the left bag body 22 start to deploy. The right bag body 21 and the left bag body 22 start to expand to the left and right while unwinding, protrude from the left and right edges of the sheet 4 as shown in FIG. 14 (B), and hit the regulation plate 28 in front. Bounced back to. As shown in FIG. 14C, the unwound right bag body 21 and left bag body 22 move forward due to the inertial force at the time of unfolding.
As in FIG. 7, the right bag body 21 and the left bag body 22 provided on the seat 4 in the front-wound state can be moved to the front of the upper body of the seated occupant by the momentum of unfolding.

The right bag body 21 and the left bag body 22 do not necessarily have to be wound up in the stored state. The right bag body 21 and the left bag body 22 that bend and start to deploy basically break the skin of the seat 4 by expanding the embedded bag body like a normal side airbag, and then inertially. Can move toward the tip of the breaking direction. By installing so that this direction is forward, the right bag body 21 and the left bag body 22 that bend and start unfolding can be unfolded forward. However, the right bag body 21 and the left bag body 22 can be moved forward more reliably by being wound in the housed state or being repelled by the regulation plate 28.

1 ... Automobile (vehicle), 2 ... Body, 3 ... Passenger room, 4 ... Seat, 5 ... Seat, 6 ... Back, 7 ... Headrest (upper fixing member), 10 ... Crew protection device, 11 ... Stereo camera, 12 ... Infrared camera, 13 ... LiDAR, 14 ... Acceleration sensor, 15 ... Communication device, 16 ... GPS receiver, 17 ... Airbag device, 21 ... Right bag body, 22 ... Left bag body, 23 ... Inflator, 24 ... Upward movable Mechanism, 27 ... Control unit, 28 ... Regulatory plate, 31 ... Arm, 36 ... Hole, 37 ... Pin, 38 ... Elastic member, 41 ... Lower fixing member, 42 ... Lower movable mechanism

Claims (5)

A right and left bag bodies that are provided along at least the left and right sides of the back of the vehicle seat and can be deployed along the upper body of the occupant seated on the seat.
An inflator that unfolds the right bag body and the left bag body,
An upper fixing member to which the upper end of the right bag body and the upper end of the left bag body are fixed, and
An upper movable mechanism that moves the upper fixing member upward along the back of the seat,
Vehicle occupant protection device.
The lower end of the right bag body and the lower end of the left bag body are fixed to the left and right side portions of the seat portion of the seat.
The vehicle occupant protection device according to claim 1.
The upper fixing member is a headrest provided on the back of the seat.
The right bag body and the left bag body move toward the center in the left-right direction of the seat by moving the upper fixing member upward.
The vehicle occupant protection device according to claim 1 or 2.
In the case of a side collision, the upper movable mechanism moves the upper fixing member upward, lower than in the case of a front collision.
The vehicle occupant protection device according to any one of claims 1 to 3.
The upper movable mechanism moves the upper fixing member after the right bag body and the left bag body start to deploy.
The vehicle occupant protection device according to any one of claims 1 to 4.

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