Crew protection devices

Abstract

To provide an occupant protection device which achieves improvement of protection performance of an occupant seated on a seat.SOLUTION: An occupant protection device is provided at a seat 1 having a seating surface part 20 on which a thigh F and a hip B are placed and a backrest part 30 which contacts with a back of an occupant. The occupant protection device includes: a tether part 50 which is provided spanning between a front part of the seating surface part and an upper part of the backrest part at a side part of the seat; a bag part 60 which is provided at the tether part and deployed by a deployment gas being introduced thereto; collision detection parts 101, 200 which detect or predict a collision of a vehicle; and an occupant protection control unit 100 which causes the tether part to generate tensile force and causes the bag part to deploy according to the detection or the prediction of the collision detected by the collision detection parts. The bag part is arranged to overlap with the tether part when viewed from the side surface side of the occupant.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an occupant protection device that protects an occupant sitting on a seat.

Background Art

[0002] As a technology related to occupant protection in vehicles such as automobiles, for example, in Patent Document 1, in a collision accident, a backrest (backrest) on a seat is prevented from falling backward by a tightening belt extending from its upper part to the front part of a seat cushion. It is described that the backrest is held in position based on the tightening belt, and a protection element positioned laterally of the seat by the tightening belt is also aligned and fixed in direction during a collision accident. It is also described that an airbag is provided in a capture net which is a protection element. In Patent Document 2, it is described that when a rear collision occurs, an inner buckle of a seat belt is pulled in, and by generating tension in both the shoulder belt and the lap belt of the seat belt, the upward slipping behavior of an occupant during a rear collision with a relatively high relative speed is suppressed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a rear collision in which a vehicle is collided from the back side of an occupant, the occupant is strongly pressed against a backrest portion of a seat. When the energy of the collision is large, the occupant further tries to push into the backrest of the seat cushion. However, there is a structural limit to how far the backrest can be pushed backward. Once this limit is reached, the backrest tilts backward, causing the occupant to slide upward and diagonally backward along the slope of the backrest. This upward sliding motion can cause the occupant's head and neck to detach from the headrest, a safety device designed to mitigate occupant injury during a rear-end collision. There are concerns that if the occupant's head and neck detach from the headrest, injuries to the neck and brainstem may worsen.

[0005] While the technology described in Patent Document 1 is acknowledged to have the effect of suppressing the backward tilting behavior of the backrest by connecting the upper part of the backrest and the front end of the seat with a tightening belt, there is a need to more effectively restrain the backward tilting behavior of the backrest in order to reliably prevent the worsening of injuries to the occupant. Furthermore, in this technology, the airbag is held in place by a trapping net, but it is difficult for such a trapping net to generate a reaction force when a load is applied to the airbag. Furthermore, in cases where occupant restraint relies on the tension of the seat belt, as in the technology described in Patent Document 2, there is concern about occupant injury due to pressure from the seat belt. In view of the above-mentioned problems, the object of the present invention is to provide an occupant protection device that improves the protective performance of occupants seated in a seat. [Means for solving the problem]

[0006] To solve the above-mentioned problems, an occupant protection device according to one aspect of the present invention is an occupant protection device provided on a seat having a seat surface on which the occupant's thighs and buttocks are placed, and a backrest portion that extends upward from the rear of the seat surface and contacts the occupant's back, the occupant protection device provided on the side of the seat, extending between the front of the seat surface and the upper part of the backrest portion, a bag portion provided on the tether portion that deploys when deployment gas is introduced, a collision detection unit that detects or predicts a collision of a vehicle, and an occupant protection control unit that generates tension in the tether portion and deploys the bag portion in response to the detection or prediction of the collision by the collision detection unit. , a collision mode determination unit that determines the mode of the collision and The bag portion is positioned so as to overlap with the tether portion when viewed from the side of the occupant. The occupant protection control unit generates tension in the tether portion and then deploys the bag portion in response to the detection or prediction of a rear collision, and deploys the bag portion and then generates tension in the tether portion in response to the detection or prediction of a side collision. It is characterized by the following. According to this, in the event of a rear-end collision where the occupant is struck from behind, the tether is stretched between the front of the seat and the top of the backrest, thereby suppressing the backward tilt of the backrest. As a result, the occupant's upper body slides upward along the tilt of the backrest, and the aggravation of injuries to the occupant caused by the occupant's head and neck going over the headrest, etc., can be suppressed. Furthermore, in the event of a side collision where the occupants are struck from the side, the bag section effectively absorbs the collision energy by receiving the reaction force of the bag section through the tether section. Furthermore, the tether and bag sections stably press against the occupant's body from near the shoulder to near the thigh, on the side opposite to the side of the impact, causing the occupant's body to shift laterally. This helps to suppress injuries to the occupant caused by cabin deformation such as the side door getting stuck or the pillars deforming. Furthermore, in the event of a rear-end collision, tension is first generated in the tether section to restrain the backward tilting behavior of the backrest section. Then, by deploying the bag section, the tension in the tether section is further increased, effectively suppressing the upward sliding of the occupant due to the tilting of the backrest section. On the other hand, in the event of a side collision, the bag section is deployed first, and then tension is generated in the tether section. This ensures that the bag section is reliably deployed even in narrow spaces surrounded by interior vehicle components, and then tension is generated in the tether section to push and move the occupant to the side.

[0007] In the present invention, the bag portion can be configured to unfold toward the occupant with respect to the line of action of the tension in the tether portion. According to this design, when the bag section is deployed, the middle section of the tether section bends or curves outward from the perspective of the occupant, further increasing the tension of the tether section and enhancing the effect of preventing the backrest section from tilting backward.

[0008] In the present invention, the tether portion and the bag portion can be configured to be positioned along the sides of the seat portion and the backrest portion in a normal state where collision detection or prediction is not performed. According to this, during normal vehicle use (non-collision situations), the tether and bag sections do not impair the ease of entry and exit for occupants or the comfort of the vehicle, thereby improving the vehicle's convenience and comfort.

[0009] In the present invention, the tether portion and the bag portion can be configured to be provided on at least the outer side of the seat in the vehicle width direction. According to this design, in the event of a near-side collision, where the vehicle is struck from the side closest to the seat, the tether and bag sections push the occupant inward in the width direction of the vehicle, thereby reducing the risk of injury to the occupant. [Effects of the Invention]

[0011] As described above, the present invention provides an occupant protection device that improves the protective performance of occupants seated in a seat. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic diagram showing a vehicle seat equipped with a first embodiment of the occupant protection device to which the present invention is applied, viewed from the side, and represents the normal state (non-collision state). [Figure 2] This is a schematic block diagram showing the system configuration of the occupant protection device of the first embodiment. [Figure 3] This is a schematic diagram showing a vehicle seat equipped with the occupant protection device of the first embodiment, viewed from the side, and represents the state when deployed (during a collision). [Figure 4] It is a cross-sectional view taken along the line IV-IV of FIG. 3. [Figure 5] It is a schematic view showing a state of a vehicle seat provided with a second embodiment of an occupant protection device to which the present invention is applied, as viewed from the side, and shows a state at the time of deployment (at the time of a collision). [Figure 6] It is a schematic view showing a state of a vehicle seat provided with a third embodiment of an occupant protection device to which the present invention is applied, as viewed from the side, and shows a state at the time of deployment (at the time of a collision). [Figure 7] It is a block diagram schematically showing a system configuration of a fourth embodiment of an occupant protection device to which the present invention is applied.

Embodiments for Carrying Out the Invention

[0013] <First Embodiment> Hereinafter, a first embodiment of an occupant protection device to which the present invention is applied will be described. The occupant protection device of the first embodiment is provided, for example, on a seat provided in a passenger compartment of an automobile such as a passenger car, and protects an occupant sitting on the seat at the time of a collision. FIG. 1 is a schematic view showing a state of a vehicle seat provided with the occupant protection device of the first embodiment, as viewed from the side, and shows a state in a normal time (when not in a collision).

[0014] As shown in FIG. 1, the occupant P has a head H, an upper body UB, arms A, legs L, thighs F, buttocks B, and the like. As an example, the occupant P is assumed to be sitting with the front of the upper body UB facing the front side of the vehicle. The seat 1 has a base portion 10, a seat cushion 20, a backrest 30, a headrest 40, and the like. The base portion 10 is a base provided at the lower part of the seat 1. The base portion 10 is attached to a floor panel (not shown) constituting the floor surface portion of the passenger compartment via a seat rail (not shown) so as to be slidable in the front-rear direction.

[0015] The seat cushion 20 is a seating surface portion on which the buttocks B and thighs F of the occupant P are placed. The seat cushion 20 is attached to the top of the base 10. The seat cushion 20 has an upper surface portion that extends along the front-to-back direction and shoulder-width direction of the occupant P. The lower limb portion of the occupant P's legs L is extended forward from the front end of the seat cushion 20.

[0016] The backrest 30 is a backrest portion provided opposite the back of the occupant P's upper body UB. The backrest 30 protrudes upward and diagonally backward from near the rear end of the seat cushion 20. The upper end of the backrest 30 is positioned behind the shoulders of the occupant P during normal use of the vehicle.

[0017] The headrest 40 is located behind the head H of the occupant P and is the part that restrains the head H when the head H rotates in a backward direction relative to the seat 1. The headrest 40 is provided projecting upward from the upper end of the backrest 30. The seat cushion 20, backrest 30, and headrest 40 are each constructed to have shock absorption (cushioning) properties by providing an elastic material, such as porous urethane foam, around a frame made of a metal material such as steel.

[0018] Furthermore, the seat 1 includes a tether 50, a side airbag 60, a deployment device 70, etc., which work in cooperation with the airbag control unit 100, etc., described later, to constitute the occupant protection device of the first embodiment. Tether 50 is made up of a strip of webbing, for example, made of a woven polyester fiber. One end 51 of the tether 50 is connected to the side of the seat cushion 20 near the front end. The other end 52 of the tether 50 is connected to the deployment device 70. The middle portion 53 of the tether 50, when the vehicle is in normal use (unextended), extends from the end portion 51 towards the rear along the side of the seat cushion 20, folds back upward near the rear end of the seat cushion 20, and extends along the side of the backrest 30 towards the upper end of the backrest 30. The intermediate section 53 is folded back downwards again near the upper end of the backrest 30, reaching the end section 52. When not deployed, the intermediate section 53 is housed inside the seat upholstery (not shown) at the sides of the seat cushion 20 and backrest 30.

[0019] The side airbag 60 is formed by sewing a base fabric panel, for example, made of a nylon fiber woven fabric, into a bag shape. The side airbag 60 is attached to the occupant P side of the middle section 53 of the tether 50. When not deployed, the side airbag 60 is folded and, together with the middle portion 53 of the tether 50, is housed inside the seat upholstery, for example, on the side of the backrest 30.

[0020] The deployment device 70 deploys the side airbag 60 and pulls the tether 50 to generate tension in the tether 50 in response to the detection of a vehicle collision (establishment of collision judgment) or the prediction of a collision (establishment of pre-crash judgment). The unfolding device 70 has a rotatable bobbin (not shown), and the end 52 of the tether 50 is wound around the bobbin. For the mechanism to tow the Tether 50, for example, a configuration similar to that of a chemical-type seat belt pretensioner can be applied. The deployment device 70 is equipped with a side airbag gas generator 130, which will be described later, for towing the tether 50 and deploying the side airbag 60. The behavior of the tether 50 and side airbags 60 when the deployment device 70 is activated will be explained in detail later.

[0021] Figure 2 is a block diagram schematically showing the system configuration of the occupant protection device of the first embodiment. The vehicle of the first embodiment has an airbag control unit 100 and an environment recognition unit 200. The airbag control unit 100 controls the deployment of various airbags installed in the vehicle and the towing of the tether 50 in response to the detection of a vehicle collision or a precursor to a collision. The environmental recognition unit 200 recognizes the environment around the vehicle based on the outputs of various sensors. The airbag control unit 100 and the environment recognition unit 200 are configured to include, for example, an information processing unit such as a CPU, a storage unit such as RAM or ROM, an input / output interface, and a bus connecting these. The airbag control unit 100 and the environmental recognition unit 200 can communicate with each other, for example, via an in-vehicle LAN such as a CAN communication system, or directly.

[0022] The airbag control unit 100 is an occupant protection control unit that controls the operation of each gas generator provided in the occupant protection device in response to the detection or prediction of a collision. The airbag control unit 100 has a collision sensor 101. The collision sensor 101 is a collision detection unit that has an acceleration sensor that detects acceleration acting on the vehicle body in the longitudinal direction, vehicle width direction, etc. When the collision sensor 101 detects a significant acceleration characteristic of a collision, the airbag control unit 100 establishes a collision determination (detects a collision), determines the type of collision, and decides to deploy the corresponding airbag. Collision types include, for example, frontal collisions where the vehicle is hit from the front, rear collisions where the vehicle is hit from the rear (typically a rear-end collision), and side collisions where the vehicle is hit from the side. These collision patterns can be determined based on the direction of the main acceleration detected by the collision sensor 101.

[0023] The airbag control unit 100 has the function of issuing operation commands to the front collision airbag gas generator 110, the curtain airbag gas generator 120, and the side airbag gas generator 130, and starting the generation of deployment gas. Each gas generator (inflator) generates a gas for deployment using, for example, explosives. The front collision airbag gas generator 110 supplies deployment gas to, for example, the driver's airbag that deploys from the center pad of the steering wheel, the passenger-side airbag that deploys from the front of the instrument panel, and so on. The curtain airbag gas generator 120 supplies deployment gas to the curtain airbag, which deploys along the side door glass, from the top of the side door glass in the passenger compartment.

[0024] The side airbag gas generator 130 is provided on the deployment device 70 described above and supplies deployment gas to the side airbag 60 via a gas supply channel (not shown). Furthermore, a portion of the deployment gas generated by the side airbag gas generator 130 is used as power to rotate the bobbin around which the end 52 of the tether 50 is wound.

[0025] The environmental recognition unit 200 is connected to a visible light camera device 210, a millimeter-wave radar device 220, a laser scanner device 230, and the like. The visible light camera device 210 is an imaging device that captures images of the area around the vehicle (front, rear, sides, etc.) using visible light cameras such as stereo cameras and single-lens cameras. The visible light camera device 210 has the function of performing image processing on the captured image to detect the presence or absence of objects around the vehicle, the relative position and relative speed of the objects with respect to the vehicle, and the shape of the lane, etc. The millimeter-wave radar system 220 is a radar system that uses radio waves in a frequency band of, for example, 30 to 300 GHz, and has the function of detecting the presence or absence of an object and the relative position of the object with respect to the vehicle. The laser scanner device 230 has a function to scan the area around the vehicle by, for example, irradiating it with pulsed near-infrared laser light, and to detect the presence or absence of an object, the relative position of the object to the vehicle, the shape of the object, etc., based on the presence or absence of reflected light and the time difference until the reflected light returns. The environmental recognition unit 200, based on the outputs of these sensors, establishes a pre-crash determination (collision prediction) when a collision with an object, such as another vehicle, is unavoidable. If a pre-collision detection is successful, the environmental recognition unit 200 determines the type of collision (front collision, rear collision, side collision, etc.) based on the output of each sensor. The environmental recognition unit 200 functions as another collision detection unit of the present invention.

[0026] The airbag control unit 100 issues an activation command to the side airbag gas generator 130 and starts generating deployment gas when a collision is determined based on the output of the collision sensor 101 and it is determined to be a rear collision or a side collision, or when the environmental recognition unit 200 determines that a pre-crash has occurred and it is determined to be a rear collision or a side collision. As a result, the deployment device 70 deploys the side airbag 60 and begins to pull (wind up) the tether 50.

[0027] Figure 3 is a schematic diagram showing a vehicle seat equipped with the occupant protection device of the first embodiment, viewed from the side, and depicts the state when deployed (during a collision). Figure 4 is a view of section IV-IV in Figure 3. When deployed, the tether 50 and side airbag 60 are exposed to the outside by tearing the seat upholstery. Tether 50 is towed by being wound onto the bobbin of the deployment device 70. The end portion 51 of the middle section 53 of the tether 50 is stretched in a straight line when viewed from the side, between the vicinity of the front end of the seat cushion 20 and the vicinity of the upper end of the backrest 30. Furthermore, the portion of the intermediate section 53 on the end 52 side is folded downward near the upper end of the backrest 30 and connected to the unfolding device 70.

[0028] As shown in Figure 3, the side airbag 60 deploys on the side of the occupant P's body, from the upper body UB to the buttocks B, when viewed from the side. A portion of the side airbag 60 is positioned to overlap with a portion of the intermediate section 53 of the tether 50 when viewed from the side, allowing the tether 50 to generate a reaction force when the side airbag 60 is subjected to a load in the width direction of the vehicle.

[0029] The tether 50 and side airbag 60 are located on the outer side in the vehicle width direction (the side adjacent to the side door D) when viewed from the occupant P. As shown in Figure 4, when viewed from above, the middle section 53 of the tether 50 is bent or curved so that the outer side (the side door D side in the example shown in Figure 4) is convex, conforming to the body shape of the occupant P and the shape of the side airbag 60. The side airbag 60 is located inside the bent section of the middle part 53 of the tether 50. The side airbag 60 is attached, for example, to the side of the tether 50 that faces the occupant P. The side airbag 60 deploys toward the occupant P with respect to the line of action of the tension acting on the tether 50 (which is usually contained within the tether 50).

[0030] According to the first embodiment described above, the following effects can be obtained. (1) In the event of a rear collision, the tether 50 is stretched between the front of the seat cushion 20 and the top of the backrest 30, thereby preventing the backrest 30, which is pressed against the back of the occupant P, from tilting backward. This prevents the occupant P's upper body UB from sliding upward along the inclination of the backrest 30, and prevents the occupant P's head H and neck from going over the headrest 40, thereby preventing the worsening of injuries to the occupant P. Furthermore, in the event of a side collision, the tether 50 receives the reaction force of the airbag 60, allowing the side airbag 60 to effectively absorb the collision energy. Furthermore, the tether 50 and side airbag 60 stably press the area from the vicinity of the occupant's shoulder to the vicinity of the thigh, as shown by the arrows in Figure 4, toward the side opposite to the side that was hit, thereby shifting the occupant's body laterally and suppressing injuries to the occupant P caused by cabin deformation such as the side door D entering or pillar deformation. (2) By positioning the side airbag 60 to deploy toward the occupant P relative to the intermediate portion 53 which coincides with the line of action of the tension of the tether 50, when the side airbag 60 deploys, the intermediate portion 53 of the tether 50 bends or curves outward when viewed from the occupant P, thereby increasing the tension of the tether 50 and further enhancing the effect of preventing the backrest 30 from tilting backward. (3) In normal conditions (before deployment) when no collision is detected or predicted, the tether 50 and side airbag 60 are positioned along the sides of the seat cushion 20 and the backrest 30 and are retracted, so that when the vehicle is in normal use (non-collision), the tether 50 and side airbag 60 do not impair the ease of entry and exit of the occupant P or the comfort of the vehicle, thereby improving the convenience and comfort of the vehicle. (4) The tether 50 and side airbag 60 are provided on the outer side of the seat 1 in the vehicle width direction. In the event of a so-called near-side collision in which the collision occurs from the side door D on the side closer to the seat 1, the tether 50 and side airbag 60 push the occupant P inward in the vehicle width direction, thereby suppressing injury to the occupant.

[0031] <Second Embodiment> Next, a second embodiment of an occupant protection device to which the present invention is applied will be described. In the embodiments described below, the same reference numerals are used for parts that are the same as in previous embodiments, and their descriptions are omitted. The differences will be explained in detail. Figure 5 is a schematic diagram showing a vehicle seat equipped with the occupant protection device of the second embodiment, viewed from above, and depicts the state when deployed (during a collision). (This corresponds to Figure 4 of the first embodiment. Figure 6, described later, is similar.)

[0032] The occupant protection device of the second embodiment is provided with a tether 50 also on the inside in the vehicle width direction relative to the occupant P. According to the second embodiment, in addition to the same effects as those of the first embodiment described above, the backward tilting behavior of the backrest 30 can be more reliably suppressed by pulling the upper ends of the backrest 30 forward on both sides.

[0033] <Third Embodiment> Next, a third embodiment of an occupant protection device to which the present invention is applied will be described. Figure 6 is a schematic diagram showing a vehicle seat equipped with the occupant protection device of the third embodiment, viewed from above, and depicts the state when deployed (during a collision). The third embodiment is a configuration that, in addition to the configuration of the second embodiment, also includes a side airbag 60 on the inside in the vehicle width direction relative to the occupant P. According to the third embodiment, in addition to the same effects as those of the first and second embodiments described above, the tether 50 on the inside in the vehicle width direction and the side airbag 60 can also be used to protect the occupant P in the event of a side collision (far side impact) from the side of the vehicle body furthest from the occupant P.

[0034] <Fourth Embodiment> Next, a fourth embodiment of the occupant protection device to which the present invention is applied will be described. Figure 7 is a schematic block diagram showing the system configuration of the occupant protection device according to the fourth embodiment. The occupant protection device of the fourth embodiment includes a tether gas generator 140 that is independent of the side airbag gas generator 130. In the fourth embodiment, the deployment gas generated by the side airbag gas generator 130 is used to deploy the side airbag 60, and the tether 50 is pulled by the gas generated by the tether gas generator 140. In the fourth embodiment, the tether 50 and the side airbag 60 can be configured in the same way as any one of the first to third embodiments.

[0035] When the airbag control unit 100 detects or predicts a collision, it adjusts the timing of the activation of the side airbag gas generator 130 and the tether gas generator 140 according to the type of collision. If a rear-end collision is detected, first the tether gas generator 140 is activated to pull the tether 50, and after tension is applied to the tether 50, the side airbag gas generator 130 is activated to deploy the side airbag 60. On the other hand, if a side collision is detected, the gas generator 130 for the side airbag is first activated to deploy the side airbag 60, and then the gas generator 140 for the tether is activated to pull the tether 50 and apply tension to the tether 50.

[0036] According to the fourth embodiment, depending on the configuration of the tether 50 and the side airbag 60, in addition to the same effects as those of the first to third embodiments described above, in the event of a rear collision, tension is first generated in the tether 50 to restrain the backward tilting behavior of the backrest 30, and then the side airbag 60 is deployed to further increase the tension of the tether 50, thereby effectively suppressing the upward sliding of the occupant due to the tilting of the backrest 30. On the other hand, in the event of a side collision, the side airbag 60 is deployed first, and then tension is generated in the tether 50, ensuring that the side airbag 60 is reliably deployed even in a narrow space surrounded by interior components of the side door D. Subsequently, tension is generated in the tether 50, which pushes the occupant P to the side, moving it away from the collision side.

[0037] (modified version) The present invention is not limited to the embodiments described above, and various modifications and changes are possible, all of which fall within the technical scope of the present invention. (1) The occupant protection devices, seats, and vehicle configuration are not limited to the embodiments described above and can be modified as appropriate. (2) The collision detection or prediction method and the hardware configuration used in the embodiment are examples and can be modified as appropriate. For example, the types of sensors installed on the vehicle are not limited to the embodiment and can be added or omitted as appropriate. Furthermore, collision prediction may not be limited to detection and prediction using sensors mounted on the vehicle itself, but may also be predicted using, for example, vehicle-to-infrastructure communication or vehicle-to-vehicle communication. (3) In this embodiment, the tether and the side airbag are made of separate parts, but the bag portion may be integrally formed on a part of the tether portion. [Explanation of Symbols]

[0038] 1 sheet 10 base section 20 seat cushions, 30 backrests 40 headrests, 50 tethers 51 End 52 End 53 Mid-section 60 Side airbags 70 Deployment device 100 Airbag control unit 101 Collision sensor 110 Front collision airbag gas generator 120 Gas generator for curtain airbags 130 Side airbag gas generator 140 Tether gas generator 200 Environmental recognition unit 210 Visible light camera device 220 Millimeter-wave radar equipment 230 Laser scanner equipment P Occupant H Head UB Upper Body A Arms L Leg F Thigh B Buttocks D Side door

Claims

1. An occupant protection device provided on a seat having a seat surface on which the occupant's thighs and buttocks are placed, and a backrest portion that extends upward from the rear of the seat surface and contacts the occupant's back, A tether portion is provided on the side of the seat, extending between the front of the seat surface and the upper part of the backrest, The bag section is provided in the tether section and deploys when deployment gas is introduced, A collision detection unit that detects or predicts vehicle collisions, An occupant protection control unit generates tension in the tether and deploys the bag in response to the detection or prediction of the collision by the collision detection unit, A collision mode determination unit for determining the mode of the collision, Equipped with, The bag portion is positioned so as to overlap with the tether portion when viewed from the side of the occupant, The occupant protection control unit generates tension in the tether portion and then deploys the bag portion in response to the detection or prediction of a rear collision, and deploys the bag portion and then generates tension in the tether portion in response to the detection or prediction of a side collision. A crew protection device characterized by the following features.

2. The bag portion unfolds toward the occupant with respect to the line of action of the tension in the tether portion. The occupant protection device according to claim 1, characterized by the following:

3. In normal conditions where collision detection or prediction is not performed, the tether portion and the bag portion are positioned along or stored along the sides of the seat portion and the backrest portion. An occupant protection device according to claim 1 or claim 2, characterized by the above.

4. The tether portion and the bag portion are provided on at least the outer side of the seat in the vehicle width direction. The occupant protection device according to claim 1, characterized by the following:

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