Vehicle with vehicular seat device having occupant protection function

Abstract

To improve performance in protecting an occupant in a vehicle.SOLUTION: A vehicle having a vehicular seat device comprises an airbag device that can expand an airbag in front of the vehicular seat device. The vehicular seat device has: a seat cushion on which legs of an occupant seated on the vehicular seat device are put; a seat back over which an upper body of the occupant seated on the seat cushion leans; and a movable member that is provided below the seat cushion, and moves to push up a rear part that is at a rear side of the vehicle and a front part that is at a front side of the vehicle with respect to the seat cushion, one by one.SELECTED DRAWING: Figure 13

Description

[Technical field]

[0001] The present invention relates to a vehicle having an occupant protection function by a vehicle seat device. [Background technology]

[0002] 2. Description of the Related Art Vehicles such as automobiles are provided with vehicle seat devices for passengers to sit in, as disclosed in Patent Documents 1 to 3. Patent Documents 1 to 3 disclose mechanisms for pushing up the seat cushion from below on which the lower legs of an occupant rest. Furthermore, vehicles are provided with seat belt devices, airbag devices, and the like for the protection of occupants. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-237820 A [Patent Document 2] JP 2004-237821 A [Patent Document 3] JP 2007-038926 A Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, performance tests of passenger protection devices such as seat belt devices and airbag devices are generally carried out using dummies that imitate human beings. However, the actual behavior of an occupant during a vehicle frontal collision does not necessarily match the behavior of a dummy during a performance test.

[0005] For example, unlike a dummy doll simply placed on a vehicle seat device, an occupant may be operating the vehicle pedals with their feet or may have their feet pressed against the floor of the vehicle at the time of a frontal collision of the vehicle. In these cases, the occupant's lower limbs are in a tense state. If a frontal collision occurs in this state, the occupant's entire body is less likely to move forward as in the case where the lower limbs are not tense, and instead, the upper body and head are more likely to instantly rotate significantly forward and downward. In particular, if the rotation of the upper body in the forward and downward direction is restricted by the pretension of the seat belt device, etc., only the occupant's head is more likely to instantly rotate excessively forward and downward. This may cause strain on the occupant's neck.

[0006] In addition, when the upper body and head of an occupant enter the deployed airbag, the head rotates as it enters the airbag, which increases the force of the head rotating and hitting the airbag on the neck of the occupant, which may cause strain on the neck of the occupant.

[0007] In addition, unlike a dummy doll simply placed in a vehicle seat apparatus, an occupant may sit in the vehicle seat apparatus with the pelvis tilted. If a frontal collision occurs in this seated state, the occupant's lower legs and pelvis tend to move forward due to inertia. The occupant's body tends to slip forward from under the seat belt due to the submarine effect.

[0008] Thus, there is a need for improvements in vehicle occupant protection. [Means for solving the problem]

[0009] A vehicle having an occupant protection function by a vehicle seat device according to one embodiment of the present invention is a vehicle having an occupant protection function by a vehicle seat device for a vehicle occupant to be seated in, and having an airbag device capable of deploying an airbag at the front side of the vehicle seat device, and the vehicle seat device has a seat cushion on which the lower legs of an occupant seated in the vehicle seat device rest, a seat back against which the upper body of the occupant seated on the seat cushion rests, and a movable member provided under the seat cushion and movable so as to push up a rear portion of the seat cushion that is at the rear of the vehicle and a front portion of the seat cushion that is at the front of the vehicle, one at a time. Effect of the Invention

[0010] In the present invention, the movable member provided under the seat cushion is movable so as to push up one of the rear portion of the seat cushion corresponding to the rear side of the vehicle and the other of the front portion of the seat cushion corresponding to the front side of the vehicle. Therefore, for example, when the movable member pushes up the rear part of the seat cushion, the pelvis of the occupant seated on the seat cushion is pushed upward while the occupant is seated on the seat cushion, and is raised or pushed up. For example, when the occupant operates the pedals of the vehicle with his / her feet or presses his / her feet against the floor of the vehicle, the pelvis of the occupant who is in a state in which the occupant's lower legs are tense may rise. Then, as the pelvis rises, the upper body of the occupant above the pelvis is likely to fall deeper against the seat back. As a result, when the occupant's pelvis rises while seated on the vehicle seat device, the upper body falls deeper against the seat back, and the occupant's shoulder blades to the toes, for example, approach a state in which the occupant's body is aligned in a straight line as if the occupant were standing upright. The occupant's upper body is easily supported by the tense lower legs, as the upper body is stretched from the shoulder blades to the toes. Furthermore, if the occupant's upper body falls further against the seat back, the occupant's head may be pressed against the headrest. The occupant's head, which is pressed against the headrest, rotates forward and downward before the frontal collision and is in a state where the chin is tucked, preparing the occupant in advance for the impact force of the frontal collision. If the vehicle crashes head-on under these conditions, the impact force acting on the occupant is likely to be transmitted from the upper body to the feet via the occupant's tense lower legs, thereby reducing the force that moves the occupant's head and other parts of the body forward. Furthermore, because the occupant's head is in a prepared position with his or her chin tucked in advance, the head can be prevented from rotating downward and forward due to the force of the impact during a subsequent frontal collision of the vehicle. As a result, the head of the occupant can be prevented from rotating excessively in the forward and downward direction due to the impact force during a frontal collision.

[0011] In contrast, if the occupant is not prepared in advance with his / her chin tucked, the impact force of the vehicle's frontal collision may cause the occupant's head to instantly rotate significantly in a forward-downward direction. The tense lower legs are less likely to move forward together with the upper body and head. Therefore, the occupant's upper body and head tend to rotate around the pelvis, which is relatively less likely to move forward. If the head rotates excessively and enters the airbag, the occupant's neck may be subjected to a force resulting from the instantaneous and large rotation in a forward-downward direction due to the impact force, and a force resulting from the head rotating and hitting the airbag. In the present invention, both of these forces can be effectively suppressed.

[0012] In addition, for example, when the movable member pushes up the front of the seat cushion, the lower legs and pelvis of the occupant seated on the seat cushion are less likely to move forward on the seat cushion due to inertia at the time of a frontal collision. The occupant's body is less likely to slip forward from under the seat belt. The submarine effect is less likely to occur.

[0013] As a result, the present invention can improve occupant protection in a vehicle by using a single movable member provided under the seat cushion to push up both the rear portion of the seat cushion, which corresponds to the rear side of the vehicle, and the front portion, which corresponds to the front side of the vehicle. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic side view of an automobile as a vehicle according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an explanatory diagram of a general passenger protection for a driver's seat device which is the vehicle seat device of the automobile shown in FIG. [Diagram 3] FIG. 3 is an explanatory diagram of an example of the behavior of a driver in a frontal collision when the driver's lower legs are tense and tensed. [Figure 4] FIG. 4 is an explanatory diagram of an example of the behavior of a seat device for a navigator, which is another vehicle seat device for an automobile, during a frontal collision when the navigator's lower legs are tense and tense. [Diagram 5] FIG. 5 is an explanatory diagram of a vehicle seat device according to an embodiment of the present invention. [Figure 6] FIG. 6 is a schematic explanatory diagram of the internal structure of the seat cushion of the vehicle seat device of FIG. [Figure 7] FIG. 7 is an explanatory diagram of the initial state of the movable member in the vehicle seat device of FIG. 5 and FIG. [Figure 8] FIG. 8 is an explanatory diagram of a state in which the movable member in FIG. 7 is pushing up the rear portion of the seat cushion. [Figure 9] FIG. 9 is an explanatory diagram of a state in which the movable member in FIG. 7 is pushing up the front part of the seat cushion. [Figure 10] FIG. 10 is an explanatory diagram of the main parts of the control system of the automobile of FIG. [Figure 11] FIG. 11 is a flowchart of the passenger protection control executed by the control unit in FIG. [Figure 12] FIG. 12 is an explanatory diagram of a state in which an occupant is seated in the vehicle seat device of FIG. 5 and FIG. [Figure 13] FIG. 13 is a diagram illustrating an example of the behavior of an occupant when a car crashes head-on with the movable member not pushing up the seat cushion. [Figure 14] FIG. 14 is an explanatory diagram of an example of the behavior of an occupant when a car crashes head-on with the movable member pushing up the rear portion of the seat cushion. [Figure 15]FIG. 15 is an explanatory diagram of an example of the behavior of an occupant when a car crashes head-on with the movable member pushing up the front part of the seat cushion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0016] FIG. 1 is a schematic side view of an automobile 1 as a vehicle according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of a general passenger protection for a driver's seat device 4 which is a vehicle seat device for the automobile 1 of FIG. 1 and 2, a vehicle 1 is provided with a vehicle compartment 3 in a vehicle body 2, and is provided with a plurality of vehicle seat devices, such as a driver's seat device 4. The vehicle seat devices are attached to a floor 5 of the vehicle compartment 3, and are intended for passengers of the vehicle 1 to sit on. In this embodiment, up, down, left, right, front and rear are used with reference to the automobile 1 in FIG.

[0017] A driver or other passenger sits in a vehicle seat apparatus after getting into the passenger compartment 3 of the automobile 1. The driver or other passenger sits in the vehicle seat apparatus with a seat belt 6 fastened around the front of the waist and the front of the upper body. A vehicle such as an automobile 1 may collide with an object 99 such as another vehicle, as shown in Fig. 1. In this case, the body of an occupant seated in a vehicle seat device will generally move forward due to the impact of the frontal collision, as shown in Fig. 1. However, the occupant's body is restrained by a seat belt 6 as shown in Fig. 2, and an airbag 10 is deployed in front of the occupant, thereby absorbing the impact. The occupant can be protected from hitting the dashboard 9 or the steering wheel 7.

[0018] However, the riding conditions of the driver and other occupants and their behavior during a frontal collision do not necessarily result in the situation shown in FIG. The state of an occupant in a frontal collision shown in FIG. 2 is an example in which a dummy modeling a human is used in a performance test of occupant protection members such as the vehicle body 2, the seat belt device 38, the airbag device 37, etc. In contrast, the actual behavior of the occupants when the automobile 1 crashes head-on does not necessarily match the behavior of the dummies used in the performance test as shown in FIG.

[0019] FIG. 3 is an explanatory diagram of an example of the behavior of a driver in a frontal collision when the driver's lower legs are tense and tensed. Unlike a dummy doll simply placed on a vehicle seat device, the driver in Figure 3 is seated in a driver's seat device 4 and operates the brake pedal 8 of the automobile 1 with his / her foot in the event of a frontal collision of the automobile 1. In this case, the driver's lower legs are tense because the driver presses the brake pedal 8 with his / her foot, as shown by the thick line in Fig. 3. If a frontal collision occurs with the driver's lower legs tense in this way, the driver's entire body is less likely to move forward as compared to the case in Fig. 2 where the driver's lower legs are not tense. Instead, the driver's upper body and head are likely to instantaneously rotate significantly forward and downward and fall. In particular, when the forward and downward rotation of the upper body is limited by the pretension of the seat belt device 38, only the driver's head is likely to instantaneously rotate excessively forward and downward relative to the upper body. Furthermore, when the driver's upper body and head enter the deployed airbag 10, the driver's head enters the airbag 10 while rotating in a forward and downward direction. This can put strain on the driver's neck.

[0020] FIG. 4 is an explanatory diagram of an example of the behavior of a navigator seat device 19, which is another vehicle seat device of the automobile 1, during a frontal collision when the navigator's lower legs are tense and tense. When the automobile 1 is hit head-on, the navigator in FIG. 4 places his / her feet on a toe board 14 which is the front part of the floor 5 of the automobile 1 and braces himself / herself. In this case, the navigator's lower legs may be tense, as shown by the thick lines in Fig. 4, with the feet braced against the toe board 14. If a frontal collision occurs with the lower legs tense in this way, the navigator's entire body is less likely to move forward, as in the case of the navigator's lower legs not being tense in Fig. 2. Instead, the navigator's upper body and head are likely to instantaneously rotate significantly forward and downward and fall. In particular, if the forward and downward movement of the upper body is limited by the pretension of the seat belt device 38, only the navigator's head is likely to instantaneously rotate excessively forward and downward relative to the upper body. Furthermore, when the navigator's upper body and head enter the deployed airbag 10, the navigator's head enters the airbag 10 while rotating in a forward and downward direction. This can put strain on the navigator's neck.

[0021] In addition, unlike a dummy doll simply placed in the vehicle seat apparatus, an occupant may sit in the vehicle seat apparatus with the pelvis tilted. If a frontal collision occurs in this seated state, the occupant's lower legs and pelvis tend to move forward due to inertia. Due to the submarine effect, the occupant's body tends to slide on the seat cushion 11 of the vehicle seat apparatus and move forward under the seat belt 6.

[0022] Thus, further improvements in passenger protection in automobiles 1 are required.

[0023] Fig. 5 is an explanatory diagram of the vehicle seat device 18 according to the embodiment of the present invention. Fig. 5 is a diagram of the vehicle seat device 18 as viewed obliquely from the rear. A vehicle seat device 18 in FIG. 5 is provided in an automobile 1 and can be used as, for example, a driver's seat device 4 or a navigator's seat device 19. The vehicle seat device 18 in FIG. 5 includes a seat cushion 11, a seat back 12, and a headrest 13. The seat cushion 11 is a portion of the vehicle seat device 18 on which the lower legs of an occupant seated in the vehicle seat device 18 rest. The seat back 12 is erected on the rear edge portion of the automobile 1 with respect to the seat cushion 11 so as to extend in the rear-upward direction of the automobile 1. The seat back 12 is a portion of the vehicle seat device 18 against which the upper body of an occupant seated on the seat cushion 11 rests. The vehicle seat device 18 may be provided with a reclining mechanism for adjusting the angle of the seat back 12 with respect to the seat cushion 11. The headrest 13 is provided on the upper side of the seat back 12 of the automobile 1. The headrest 13 is a portion of the vehicle seat device 18 against which the head of an occupant seated on the seat cushion 11 rests.

[0024] FIG. 5 also shows the internal structure of the seat back 12. The seat back 12 has a frame-shaped seat back frame 21, a seat back cross member 22, and a lumbar back panel 23.

[0025] The seat back frame 21 is made of a metal material and formed into a frame shape that conforms to the outer shape of the upper, lower, left and right edges of the seat back 12.

[0026] The seatback cross member 22 connects the right vertical portion and the left vertical portion of the frame-shaped seatback frame 21 at the upper portion of the frame-shaped seatback frame 21. The seatback cross member 22 may be formed using the same metal material as the seatback frame 21. The seatback cross member 22 supports the upper body of the occupant from the rear side when the upper body of the occupant is swung forward and backward during a rear-end collision or the like, thereby making it difficult for the upper body of the occupant to move significantly rearward. In addition, as described below, when the upper body of the occupant is supported by the seatback cross member 22, the head of the occupant is supported from the rear side by the headrest 13. This is expected to lower the occupant's chin and make it difficult for the occupant to suffer neck injuries such as whiplash.

[0027] The lumbar back plate 23 is a plate-like member provided on the inside of the frame-shaped seat back frame 21. The lumbar back plate 23 is connected to the inside of the frame-shaped seat back frame 21 by a plurality of lumbar supports 24. The lumbar back plate 23 and the plurality of lumbar supports 24 may be formed using a flexible material. This allows the lumbar back plate 23 and the plurality of lumbar supports 24 to bend to conform to the shape of the occupant's back due to the load of the occupant leaning against the seat back 12. By deforming according to the load of the occupant, the lumbar back plate 23 can support the occupant's load in a planar manner and support the occupant's upper body from the back. The lumbar back plate 23 does not have to be a rectangular plate shape as shown in FIG. 6, but may be a shape that imitates, for example, the human skeleton of the spine and ribs.

[0028] FIG. 6 is a schematic explanatory diagram of the internal structure of the seat cushion 11 of the vehicle seat device 18 of FIG. The seat cushion 11 includes a seat cushion frame 50 , a plurality of folded elastic members 55 , a cushion member 56 , and a movable member 60 .

[0029] The seat cushion frame 50 has a left side frame portion 52, a right side frame portion 53, a front frame portion 51, and a rear frame portion 54 extending along both left and right side surfaces of the seat cushion 11. The front frame portion 51 connects a front end of the left side frame portion 52 to a front end of the right side frame portion 53. The rear frame portion 54 connects a rear end of the left side frame portion 52 to a rear end of the right side frame portion 53. Such a seat cushion frame 50 may be formed in a substantially rectangular frame shape.

[0030] The folded elastic member 55 is made by folding a steel wire into a wave shape. The plurality of folded elastic members 55 are arranged inside the substantially rectangular seat cushion frame 50 so as to extend between the front frame portion 51 and the rear frame portion 54. The plurality of folded elastic members 55 may be arranged so as to extend between a pair of left and right side frame portions.

[0031] The cushion material 56 is formed in a substantially rectangular flat plate shape having substantially the same size as the seat cushion frame 50, which is in the form of a substantially rectangular frame. Then, the cushion material 56 in the shape of a substantially rectangular flat plate is placed on the plurality of folded elastic materials 55. In this way, the seat cushion 11 obtains cushioning properties due to the plurality of folded elastic materials 55 and the cushion material 56.

[0032] The movable member 60 is provided below the plurality of folded elastic members 55 that form the bottom surface of the seat cushion 11 . As indicated by the thick lines in FIG. 6, the movable member 60 has a plate-shaped base portion 61, a rear push-up portion 62, and a front push-up portion 63.

[0033] The plate-shaped base portion 61 is formed by bending a steel plate having the same left-right width as the seat cushion 11 into a generally V-shaped cross section in the front-rear direction. As a result, the plate-shaped base portion 61 extends in the front-rear direction from the front to the rear of the seat cushion 11 below the seat cushion 11.

[0034] The rear push-up portion 62 extends upward from the rear edge of the plate-shaped base portion 61. The rear push-up portion 62 may be formed, for example, by bending upward the rear end portion of the steel plate of the plate-shaped base portion 61. As a result, the rear push-up portion 62 protrudes above the plate-shaped base portion 61 from the rear portion of the plate-shaped base portion 61 extending in the front-rear direction, with a width equal to the left-right direction of the automobile 1. Further, the rear push-up portion 62 is formed in a comb-tooth shape so as to avoid the plurality of folded elastic members 55 provided on the seat cushion 11 so as to extend in the front-rear direction or the left-right direction.

[0035] The front push-up portion 63 extends upward from the front edge of the plate-shaped base portion 61. The front push-up portion 63 may be formed, for example, by bending upward the front end portion of the steel plate of the plate-shaped base portion 61. As a result, the front push-up portion 63 protrudes above the plate-shaped base portion 61 from the front portion of the plate-shaped base portion 61 extending in the front-rear direction, with a width equal to the left-right direction of the automobile 1. Further, the front push-up portion 63 is formed in a comb-tooth shape so as to avoid the plurality of folded elastic members 55 provided on the seat cushion 11 so as to extend in the front-rear direction or the left-right direction. The front push-up portion 63 may be formed in a plate shape that is long in the left-right direction. In contrast, the rear push-up portion 62 is preferably formed in a comb-tooth shape rather than in a plate shape that is long in the left-right direction.

[0036] FIG. 7 is an explanatory diagram of the initial state of the movable member 60 in the vehicle seat device 18 of FIGS. As shown in FIG. 7, a rear actuator 43 and a front actuator 44 are arranged between the plate-shaped base portion 61 and the floor 5 as actuators that can be extended upward to push the plate-shaped base portion 61 upward. Specifically, the rear actuator 43 is provided between the floor 5 and a rear portion of a plate-shaped base portion 61 that is bent in the front-rear direction into a generally V-shaped cross section. In contrast, the front actuator 44 is provided between the floor 5 and a front portion of a plate-like base portion 61 that is bent in a generally V-shaped cross section in the front-rear direction.

[0037] FIG. 8 is an explanatory diagram showing a state in which the movable member 60 in FIG. 7 is pushing up the rear portion of the seat cushion 11. In FIG. In this case, of the front actuator 44 and the rear actuator 43, the rear actuator 43 is actuated. As a result, the rear actuator 43 pushes the rear portion of the plate-shaped base portion 61 of the movable member 60 upwardly above the front portion. As the rear portion of the plate-shaped base portion 61 rises higher than the front portion, the rear push-up portion 62 of the movable member 60 pushes up the rear portion of the seat cushion 11 . Moreover, since the rear push-up portion 62 has a comb-tooth shape, the rear push-up portion 62 pushes up the rear of the seat cushion 11 so as to protrude upward from between the multiple folded elastic members 55 of the seat cushion 11 . The rear portion of the seat cushion 11 can be pushed up higher than in a case where the rear push-up portion 62 hits the multiple folded elastic members 55 of the seat cushion 11.

[0038] FIG. 9 is an explanatory diagram showing a state in which the movable member 60 in FIG. 7 is pushing up the front portion of the seat cushion 11. In FIG. In this case, of the front actuator 44 and the rear actuator 43, the front actuator 44 is activated. As a result, the front actuator 44 pushes the front portion of the plate-shaped base portion 61 of the movable member 60 upwardly above the rear portion. As the front portion of the plate-shaped base portion 61 rises higher than the rear portion, the front push-up portion 63 of the movable member 60 pushes up the front portion of the seat cushion 11 . Moreover, since the front push-up portion 63 has a comb-tooth shape, the front push-up portion 63 pushes up the front of the seat cushion 11 so as to protrude upward from between the multiple folded elastic members 55 of the seat cushion 11 . The front portion of the seat cushion 11 can be pushed up higher than in a case where the front push-up portion 63 hits the multiple folded elastic members 55 of the seat cushion 11.

[0039] In this manner, the movable member 60 is provided so as to be movable so as to push up the rear portion of the seat cushion 11, which is the rear side of the automobile 1, and the front portion, which is the front side of the automobile 1, one by one.

[0040] FIG. 10 is an explanatory diagram of a main part of the control system 30 of the automobile 1 of FIG. The control system 30 of the automobile 1 in Figure 10 includes an exterior camera 31, an acceleration sensor 32, a timer 33, an interior camera 34, a pedal sensor 35, a control unit 36, an airbag device 37, a seat belt device 38, a seat device 39, and a vehicle network 40 to which these are connected. Other sensors and devices may be connected to the vehicle network 40. The sensors and the like may be connected to the vehicle network 40 through a sensor control device. The vehicle network 40 may be, for example, a vehicle network such as a Controller Area Network (CAN) or a Local Interconnect Network (LIN), or a communication network such as the Institute of Electrical and Electronics Engineers (IEEE) 802.3.

[0041] The exterior camera 31 is an imaging device that detects the outside of the automobile 1 by capturing images. The exterior camera 31 may be, for example, a monocular camera with a wide angle of view, a compound eye camera, or a 360-degree camera. The automobile 1 may be provided with multiple exterior cameras 31. When predicting a head-on collision or the like, it is desirable for the exterior camera 31 to capture at least an image of the front side, which is the traveling direction of the automobile 1. Furthermore, the exterior camera 31 may detect objects 99, such as other moving bodies or structures, around the automobile 1 that are included in the captured image by image analysis or the like. In this case, the exterior camera 31 may detect the relative direction and distance from the vehicle for each detected object 99. The detection and relative direction and distance of objects 99 around the vehicle can also be detected by other external sensors such as Lidar, radar, etc.

[0042] The acceleration sensor 32 detects the acceleration of the automobile 1. The acceleration sensor 32 may detect acceleration in three axial directions, i.e., forward / backward, left / right, and up / down, or may detect acceleration in the roll, pitch, and yaw directions. When detecting a frontal collision, it is desirable for the acceleration sensor 32 to detect acceleration at least along the forward / backward direction of the automobile 1.

[0043] The timer 33 measures a time, a period or an instant of time.

[0044] The in-vehicle camera 34 captures an image of the passenger compartment 3 of the automobile 1. In this embodiment, the in-vehicle camera 34 preferably captures an image of the lower legs of a driver seated in the driver's seat device 4, an operating state of the brake pedal 8, and the lower legs of a navigator seated in the navigator's seat device 19. The captured image of the in-vehicle camera 34 may contain infrared components. The in-vehicle camera 34 may detect the riding state of the occupant contained in the captured image by image analysis or the like. For example, when the occupant's lower limbs are tense, the image of the lower limbs may contain blood flow components different from when the lower limbs are not tense. The state of tension in the lower limbs of an occupant in the passenger compartment 3 of the automobile 1 can also be detected by other sensors, such as an infrared sensor, a seat pressure sensor, a sweat sensor on the steering wheel 7, and the like. These in-vehicle sensors can detect the state of an occupant seated in the vehicle seat device 18.

[0045] The pedal sensor 35 detects the operation states of various pedals such as the brake pedal 8 operated by the driver. The pedal sensor 35 may detect the depression amount of the brake pedal 8. In this case, a depression amount of 0 means that the pedal is not being depressed. The pedal sensor 35 serves as an operation sensor and detects the operation of the brake pedal 8 that is operated by the driver seated in the driver's seat device 4 with his / her foot.

[0046] The airbag device 37 has an airbag 10 and an inflator 41. The airbag device 37 is provided in front of the vehicle seat device 18. The airbag device 37 in Figs. 2 and 3 is provided on the steering wheel 7 of the vehicle 1 in front of the driver's seat device 4, and deploys the airbag 10 in front of the vehicle seat device 18. The airbag device 37 in Fig. 4 is provided on the dashboard 9 of the vehicle 1 in front of the navigator seat device 19. When a frontal collision of the vehicle 1 is detected, the navigator seat device 19 activates the inflator 41 by an ignition signal from the control unit 36, and deploys the airbag 15 by the high-pressure gas generated by the inflator 41.

[0047] The seat belt device 38 includes a seat belt 6, a tensioner 42, and the like. The seat belt 6 may be in the form of a long belt. The tensioner 42 may be, for example, a motor that drives a reel around which the seat belt 6 is wound. When a collision such as a frontal collision of the automobile 1 is predicted or detected, the seat belt device 38 activates the tensioner 42 in response to an activation signal from the control unit 36. As a result, the remaining part of the seat belt 6 is wound onto the reel, and the occupant seated in the vehicle seat device 18 can be restrained in the vehicle seat device 18.

[0048] The seat device 39 has a movable member 60, a rear actuator 43, and a front actuator 44. The rear actuator 43 or the front actuator 44 may be anything that can push up the movable member 60, and may be a cylinder that can extend upward, or an airbag device that can deploy an airbag upward.

[0049] The control unit 36 ​​executes control for protecting passengers of the automobile 1 from a collision such as a frontal collision of the automobile 1. The control unit 36 ​​may basically have a CPU (Central Processing Unit) and a memory (not shown). The memory may store programs and data used by the control unit 36 ​​for passenger protection control. In this case, the CPU functions as the control unit 36 ​​for passenger protection by reading and executing the programs from the memory. When protecting an occupant, the control unit 36 ​​outputs an ignition signal to an inflator 41 of the airbag device 37, outputs an activation signal to a tensioner 42 of the seat belt device 38, and outputs an activation signal to a rear actuator 43 and a front actuator 44 of the seat device 39.

[0050] FIG. 11 is a flowchart of the passenger protection control executed by the control unit 36 ​​of FIG. The control unit 36 ​​repeatedly executes the passenger protection control shown in FIG. In the following description, a case in which the control unit 36 ​​protects a driver seated in the driver's seat device 4 will be described as an example. However, the control unit 36 ​​may also perform protection control for other occupants, such as a navigator seated in another seat device 39 of the automobile 1, for example, a navigator seated in the navigator seat device 19, by repeatedly executing the occupant protection control of Figure 9.

[0051] In step ST1, the control unit 36 ​​predicts the possibility of a frontal collision of the automobile 1 based on the detection results of the external sensors. For example, the control unit 36 ​​may obtain the detection result of the exterior camera 31 as an exterior sensor, and determine whether or not an object 99 is present ahead of the path of the vehicle, or whether or not an object 99 is present crossing the path of the vehicle. If there is no object 99 ahead of the path of the vehicle, and if there is no object 99 crossing the path of the vehicle, the control unit 36 ​​predicts that there is no possibility of a head-on collision of the automobile 1, and repeats this process. On the other hand, if there is an object 99 ahead of the vehicle's path, or if there is an object 99 crossing the vehicle's path, the control unit 36 ​​predicts the possibility of a head-on collision of the automobile 1, and proceeds to step ST2.

[0052] In step ST2, the control unit 36 ​​determines whether or not the lower legs of the driver seated in the driver's seat device 4 are in a tense state, based on the detection results of the in-vehicle sensors or the operation sensors. For example, the control unit 36 ​​may obtain the detection result of the in-vehicle camera 34 as an in-vehicle sensor, and determine whether or not the driver's lower legs included in the image captured by the in-vehicle camera 34 are in a tense state. When the driver is aware of the possibility of a frontal collision, he or she may tense up his or her lower legs as if pushing the feet against the floor 5. In this case, the driver's lower legs may be tense and tense. Additionally, for example, the control unit 36 ​​may obtain a detection result of the pedal sensor 35 as an operation sensor and determine whether or not the driver is operating the brake pedal 8. When the driver is aware of the possibility of a frontal collision, he or she applies force to his or her lower legs and operates the brake pedal 8 with his or her foot. In this case, the driver's lower legs are tense and are under tension. Then, when it is determined that the driver's lower legs are in a tense state based on the detection result of an in-vehicle sensor or the detection result of an operation sensor, for example, the control unit 36 ​​advances the process to step ST3. On the other hand, when it is not determined that the driver's lower legs are in a tense state, the control unit 36 ​​advances the process to step ST4.

[0053] Step ST3 is a process that is executed when a frontal collision of the automobile 1 is predicted in a case where the driver's lower legs are in a tense state. The control unit 36 ​​activates the rear actuator 43 of the seat device 39. As a result, the movable member 60 moves from the state shown in FIG. 7 to the state shown in FIG. As the rear portion of the plate-shaped base portion 61 of the movable member 60 rises higher than the front portion, the rear push-up portion 62 of the movable member 60 pushes up the rear portion of the seat cushion 11 . Moreover, since the rear push-up portion 62 has a comb-tooth shape, the rear push-up portion 62 pushes up the rear of the seat cushion 11 so as to protrude upward from between the multiple folded elastic members 55 of the seat cushion 11 . Such movement of the movable member 60 causes the driver's pelvis to rise forward and upward. It is expected that the upper body on the pelvis will lean backward toward the seat bag. By leaning deeply toward the seat bag, the driver's upper body can be supported by the seat back cross member 22. Thereafter, the control unit 36 ​​advances the process to step ST5.

[0054] Step ST4 is a process that is executed when the driver's lower legs are not in a tense state and a frontal collision of the automobile 1 is predicted. The control unit 36 ​​activates the front actuator 44 of the seat device 39. As a result, the movable member 60 moves from the state shown in FIG. 7 to the state shown in FIG. As the front portion of the plate-shaped base portion 61 of the movable member 60 rises above the rear portion, the front push-up portion 63 of the movable member 60 pushes up the front portion of the seat cushion 11 . Moreover, since the front push-up portion 63 has a comb-tooth shape, the front push-up portion 63 pushes up the front of the seat cushion 11 so as to protrude upward from between the multiple folded elastic members 55 of the seat cushion 11 . By such movement of the movable member 60, the driver's lower limbs and pelvis are less likely to move forward on the seat cushion 11 due to the seat cushion 11 being raised at the front. The occupant's body is less likely to slide on the seat cushion 11 of the driver's seat device 4 and move forward from under the seat belt 6. The submarine effect of the driver can be suppressed. Thereafter, the control unit 36 ​​advances the process to step ST5.

[0055] In step ST5, the control unit 36 ​​activates the tensioner 42 of the seat belt device 38 based on the prediction of a frontal collision of the automobile 1. As a result, the driver seated in the driver's seat device 4 is restrained by the driver's seat device 4 so as to be less likely to move forward from the seating position. The movement of the movable member 60 in step ST3 or step ST4 and the pretensioning operation of the seat belt 6 in step ST5 may be performed simultaneously. However, as in this embodiment, it is preferable that the movement of the movable member 60 by the rear actuator 43 or the front actuator 44 occurs slightly before the pretensioning operation. This makes it possible to ensure that the driver's body is restrained by the seat belt 6 after the driver's body has fallen into the seat back cross member 22 due to the movement of the movable member 60 in step ST3, for example.

[0056] In step ST6, the control unit 36 ​​judges whether or not a frontal collision of the automobile 1 has been detected. For example, when the detection value of the acceleration sensor 32 exceeds a threshold value for a frontal collision, the control unit 36 ​​may determine that a frontal collision of the automobile 1 has been detected. The threshold value for the acceleration of a frontal collision may be set to be greater than the acceleration occurring during normal driving of the automobile 1, for example. If a frontal collision of the automobile 1 is detected, the control unit 36 ​​advances the process to step ST7. On the other hand, if a frontal collision of the automobile 1 has not been detected, the control unit 36 ​​repeats this process. The control unit 36 ​​may use the timer 33 to measure the time that has elapsed since the prediction of a frontal collision of the automobile 1, and may end this control if a predetermined period of time has elapsed until the predicted time of the frontal collision without detecting a frontal collision. At this time, the control unit 36 ​​may return the movable member 60 operated in step ST3 or step ST4 to the initial position in Fig. 7, and release the tensioner 42 operated in step ST5.

[0057] In step ST7, the control unit 36 ​​activates the inflator 41 of the airbag device 37. As a result, the airbag 10 is deployed in front of the driver seated in the driver's seat device 4, as shown in FIG. The body of the driver seated in the driver's seat device 4 enters the deployed airbag 10, and the impact can be absorbed.

[0058] Next, a specific example of the above-mentioned passenger protection control will be described in detail.

[0059] FIG. 12 is an explanatory diagram of a state in which an occupant is seated in the vehicle seat device 18 of FIGS. As shown in FIG. 12, an occupant sits in a vehicle seat apparatus 18. The driver operates the brake pedal 8 by placing his / her foot on the brake pedal 8 .

[0060] FIG. 13 is an explanatory diagram of an example of the behavior of a passenger when the automobile 1 undergoes a frontal collision in a state in which the movable member 60 is not pushing up the seat cushion 11. In FIG. As shown by the thick line in FIG. 13, the occupant applies force to the lower leg in order to operate the brake pedal 8 with the foot. If the automobile 1 crashes head-on while the lower legs are in this state of tension, the occupant's head may move forward relative to the occupant's upper body, which is restrained by the seat belt 6. Therefore, the occupant's head behaves in such a way that it rotates significantly in a forward and downward direction due to the impact of the collision. Thereafter, the occupant's head, while tilted forward relative to the upper body, enters the deploying airbag 10. The head may enter the deploying airbag 10 before the upper body of the occupant. The occupant's head enters the airbag 10 while rotating significantly forward and downward, which may put strain on the occupant's neck.

[0061] FIG. 14 is an explanatory diagram of an example of the behavior of an occupant when the automobile 1 undergoes a frontal collision while the movable member 60 is pushing up the rear portion of the seat cushion 11. In FIG. In FIG. 14, the occupant exerts force on his / her lower leg in order to operate the brake pedal 8 with his / her foot.

[0062] Since the movable member 60 pushes the rear part of the seat cushion 11 upward, the pelvis of the occupant rises forward and upward compared to FIG. 13. In particular, the movable member 60 can move to be above the multiple folded elastic members 55 and push the pelvis of the occupant forward and upward with only the cushion member 56 interposed. As a result, the upper body on the pelvis rising forward and upward falls deeply against the seat back 12 and can be supported by the seat back cross member 22. The body of the occupant approaches a straight line of the dashed line from the neck to the toes of the occupant. The force acting on the occupant in the event of a frontal collision is easily transferred to the feet of the occupant. This can be a force that operates the brake pedal 8 deeply. In addition, an occupant who has fallen backward and whose upper body is supported by the seatback cross member 22 is likely to apply force to the area from the upper body to the lower legs, as shown by the thick line in Fig. 14. The upper body is more likely to be supported by the lower legs. It is expected that the upper body will be less likely to fall forward relative to the lower legs due to the impact force of the collision.

[0063] Furthermore, when the occupant reclins deeply against the seat back 12 so that the back is supported by the seat back cross member 22, the occupant's head is pushed forward by the headrest 13 and falls. The occupant's head may be in a state in which the chin is lowered and prepared in advance for the impact of the subsequent frontal collision. By preparing the head before the occurrence of a frontal collision, the occupant's head can be prevented from rotating forward and downward due to the input of the impact of the frontal collision.

[0064] 13. Furthermore, if the automobile 1 subsequently crashes head-on, the upper body of the occupant, from the state in which he or she has reclined deeply against the seat back 12, will enter the deploying airbag 10, as in the case of FIG. However, because the occupant's head is prevented from rotating in a forward-downward direction due to the impact input of the frontal collision, the occupant's head, together with the upper body, is likely to enter the deploying airbag 10. The occupant's head, together with the upper body, is likely to enter the deploying airbag 10 without being significantly rotated in a forward-downward direction due to the impact of the frontal collision. Moreover, in the case of Fig. 14, the force acting on the occupant in the event of a frontal collision is more likely to be transferred to the occupant's feet. Therefore, the force that moves the occupant's upper body and head forward in Fig. 14 is expected to be smaller than that in Fig. 13. As a result, even if the occupant's head enters the airbag 10 before the upper body, the forward movement of the upper body can be reduced. The load of the occupant's upper body acting on the occupant's neck can be reduced compared to Fig. 13.

[0065] FIG. 15 is an explanatory diagram of an example of the behavior of an occupant when the automobile 1 crashes head-on while the movable member 60 is pushing up the front portion of the seat cushion 11. In FIG. In Figure 15, the occupant simply places his foot on the brake pedal 8. The occupant is not exerting any force on his lower legs.

[0066] Since the movable member 60 pushes up the front portion of the seat cushion 11, the front portion of the seat cushion 11 becomes higher than the rear portion. In particular, the movable member 60 can be moved to be above the plurality of folded elastic members 55, and can push up the front portion of the seat cushion 11 highly forward and upward with only the cushion member 56 interposed therebetween. By such movement of the movable member 60, the driver's lower limbs and pelvis are less likely to move forward on the seat cushion 11 due to the seat cushion 11 being raised at the front. The occupant's body is less likely to slide on the seat cushion 11 of the vehicle seat device 18 and move forward from under the seat belt 6. The submarine effect of the driver can be suppressed.

[0067] As described above, in this embodiment, the movable member 60 provided on the underside of the seat cushion 11 is movable so as to push up the rear portion of the seat cushion 11, which corresponds to the rear side of the automobile 1, and the front portion, which corresponds to the front side of the automobile 1, one at a time. Therefore, for example, when the movable member 60 pushes up the rear of the seat cushion 11, the pelvis of the occupant seated on the seat cushion 11 is pushed upward while the occupant is seated on the seat cushion 11, and is raised or pushed up. For example, the occupant's pelvis may rise when the occupant operates the pedals of the automobile 1 with his / her feet or presses his / her feet against the floor 5 of the automobile 1, and the occupant's lower limbs are in a state of being tense. Then, as the pelvis rises, the upper body of the occupant above the pelvis is more likely to fall deeper against the seat back 12. As a result, when the occupant's pelvis rises while seated on the vehicle seat device 18, the upper body falls deeper against the seat back 12, and the occupant's shoulder blades to the toes, for example, approach a state in which the occupant's body is aligned along a straight line as if the occupant were standing upright. The occupant's upper body is supported more easily by the tense lower limbs, which pushes the upper body from the shoulder blades to the toes. Moreover, if the occupant's upper body reclins deeper against the seat back 12, the occupant's head may be pressed against the head restraint 13. The occupant's head, which is pressed against the head restraint 13, rotates forward and downward before the frontal collision and is in a state where the chin is tucked, and the occupant is prepared in advance for the impact force of the frontal collision. If the automobile 1 crashes head-on under these conditions, the impact force of the frontal collision acting on the occupant is likely to be transmitted from the upper body of the occupant through the lower limbs that are being held in place to the feet, thereby suppressing the force that moves the occupant's head, etc., forward. Furthermore, since the occupant's head is in a prepared position with his / her chin tucked in advance, the head can be prevented from rotating downward and forward due to the impact force during a subsequent frontal collision of the automobile 1. As a result, the head of the occupant can be prevented from rotating excessively in the forward and downward direction due to the impact force during a frontal collision.

[0068] In contrast, if the occupant is not prepared in advance with his / her chin tucked, the impact force of the frontal collision of the automobile 1 may cause the occupant's head to instantly rotate significantly in a forward-downward direction. The tense lower limbs are less likely to move forward together with the upper body and head. Therefore, the occupant's upper body and head tend to rotate around the pelvis, which is relatively less likely to move forward. If the head rotates excessively and enters the airbag 10, the occupant's neck may be subjected to a force resulting from the instantaneous and large rotation in a forward-downward direction due to the impact force, and a force resulting from the head rotating and hitting the airbag 10. In this embodiment, both of these forces can be effectively suppressed.

[0069] In addition, for example, when the movable member 60 pushes up the front part of the seat cushion 11, the lower limbs and pelvis of the occupant seated on the seat cushion 11 are less likely to move forward on the seat cushion 11 due to inertia at the time of a frontal collision. The occupant's body is less likely to move forward so as to slip out from under the seat belt 6. The submarine effect is less likely to occur.

[0070] As a result, in this embodiment, the single movable member 60 provided under the seat cushion 11 can push up the rear portion of the seat cushion 11, which is the rear side of the automobile 1, and the front portion of the seat cushion 11, which is the front side of the automobile 1. As a result, in this embodiment, it is possible to improve the protection of passengers in the automobile 1.

[0071] In particular, in this embodiment, at least the rear push-up portion 62 of the front push-up portion 63 and the rear push-up portion 62 of the movable member 60 is formed in a comb-tooth shape to avoid the multiple folded elastic members 55 provided extending in the front-rear direction or the left-right direction in the seat cushion 11. Among the front push-up portion 63 and the rear push-up portion 62, those formed in a comb-tooth shape push up between the multiple folded elastic members 55 of the seat cushion 11. As a result, the rear push-up portion 62, for example, formed in a comb-tooth shape, is less likely to be hindered from rising by the folded elastic material 55, and moves to protrude above the folded elastic material 55 from between the folded elastic material 55. The pelvis of the occupant seated on the seat cushion 11 can be greatly raised by the rear push-up portion 62, which can move greatly upward without being restricted in its upward movement by the folded elastic material 55. In addition, the large rise of the pelvis can cause the occupant's upper body to fall deeply against the seat back 12. This enhances the effect of the occupant's body, for example, from the shoulder blades to the toes, approaching a state in which the occupant is standing upright and is aligned in a straight line. The occupant's upper body can be stretched from the shoulder blades to the toes, making it easier to support the upper body with the tense lower limbs. In contrast, if the rear push-up portion 62 were formed as a single flat plate, for example, the rear push-up portion 62 would be prevented from rising by the folded elastic material 55 provided on the seat cushion 11. The rear push-up portion 62 would try to push up the entire rear portion of the seat cushion 11. When the rear push-up portion 62 pushes up the entire rear portion of the seat cushion 11, the pushing up would be restricted by the folded elastic material 55. The pelvis of the occupant seated on the seat cushion 11 would be unlikely to rise significantly.

[0072] In this embodiment, a seatback cross member 22 is provided on the upper portion of a frame-shaped seatback frame 21. Therefore, when the movable member 60 pushes up the rear portion of the seat cushion 11 and the upper body of the occupant leans deeper against the seat back 12, the upper body of the occupant can be supported by the seat back cross member 22. The upper body of the occupant leans deeper rearward toward the seat back cross member 22 and can be supported by the seat back cross member 22. Furthermore, when the occupant reclins deeply into the seat back so as to be supported by the seat back cross member, the occupant's head is pushed forward by the headrest, which can lead to a pre-prepared position with the chin tucked.

[0073] In this embodiment, when the control unit 36 ​​predicts a frontal collision of the automobile 1 based on the detection result of the external sensor, it activates the actuator before detecting the frontal collision of the automobile 1, and pushes up the seat cushion 11 with the movable member 60. This allows the pelvis of the occupant seated on the seat cushion 11 to rise before the frontal collision is detected. An occupant with tense legs can prepare for the frontal collision before the frontal collision is detected. In particular, when predicting a frontal collision of the automobile 1, the control unit 36 ​​judges whether or not the lower legs of the occupant seated in the vehicle seat device 18 are tense, based on the detection results of the in-vehicle sensor or the operation sensor. If the occupant's lower legs are tense, the control unit 36 ​​activates the rear actuator 43 before detecting a frontal collision of the automobile 1, thereby raising the rear side of the plate-shaped base part 61 of the movable member 60 above the front side. This allows the pelvis of the occupant whose lower legs are tense to rise. In contrast, when the occupant's lower legs are not tense, the control unit 36 ​​activates the front actuator 44 before detecting a frontal collision of the automobile 1, to raise the front side of the plate-shaped base portion 61 of the movable member 60 higher than the rear side. This makes it difficult for an occupant whose lower legs are not tense to slip forward from under the seat belt 6. This makes it difficult for the submarine effect to occur.

[0074] The above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications and changes are possible without departing from the gist of the invention.

[0075] In the embodiment described above, the movable member 60 is moved by a combination of the front actuator 44 and the rear actuator 43, thereby pushing up one of the front and rear portions of the seat cushion 11. Alternatively, for example, the movable member 60 may push up one of the front and rear portions of the seat cushion 11 by an actuator that rotates the movable member 60 around an axis in the left-right direction.

[0076] In the embodiment described above, the rear push-up portion 62 and the front push-up portion 63 of the movable member 60 are both formed in a comb-tooth shape. Alternatively, for example, only the rear push-up portion 62 out of the rear push-up portion 62 and the front push-up portion 63 may be formed in a comb-tooth shape. Furthermore, the upper end of the rear push-up portion 62 formed in a comb-tooth shape may be folded so that the surface formed by the folding pushes up the rear part of the seat cushion 11. Similarly, the upper end of the front push-up portion 63 formed in a comb-tooth shape may be folded so that the surface formed by the folding pushes up the front part of the seat cushion 11. As a result, the pelvis or lower legs of an occupant seated on the seat cushion 11 can be pushed up by the surface formed by the folding. The rear push-up portion 62 may be composed of a plurality of pillars arranged in a line and erected on the rear edge of the plate-shaped base portion 61. Similarly, the front push-up portion 63 may be composed of a plurality of pillars arranged in a line and erected on the front edge of the plate-shaped base portion 61. In this case, the plurality of pillars may be arranged so as to avoid the plurality of folded elastic members 55 arranged in the seat cushion 11 to extend in the front-rear or left-right direction. [Explanation of symbols]

[0077] 1...Automobile (vehicle), 2...Vehicle body, 3...Vehicle interior, 4...Driver's seat device, 5...Floor, 6...Seat belt, 7...Steering wheel, 8...Brake pedal, 9...Dashboard, 10...Airbag, 11...Seat cushion, 12...Seat back, 13...Headrest, 14...Toe board, 15...Airbag, 18...Vehicle seat device, 19...Navigator seat device, 21...Seat back frame, 22...Seat back cross member, 23...Lumbar back panel, 24...Lumbar support material, 30...Control system, 31...External camera, 32...Acceleration sensor, 33...Timer, 34...Vehicle Internal camera, 35...pedal sensor, 36...control unit, 37...airbag device, 38...seat belt device, 39...seat device, 40...vehicle network, 41...inflator, 42...tensioner, 43...rear actuator, 43...actuator, 44...front actuator, 50...seat cushion frame, 51...front frame portion, 52...left side frame portion, 53...right side frame portion, 54...rear frame portion, 55...folded elastic material, 56...cushion material, 60...movable member, 61...plate-shaped base portion, 62...rear push-up portion, 63...front push-up portion, 99...object

Claims

1. A vehicle having an occupant protection function by a vehicle seat device for seating an occupant of the vehicle, an airbag device capable of deploying an airbag in front of the vehicle seat device; The vehicle seat device includes: a seat cushion on which the lower legs of an occupant seated in the vehicle seat device are placed; a seat back against which an upper body of the occupant seated on the seat cushion rests; a movable member provided under the seat cushion and movable to push up a rear portion of the seat cushion that is a rear side of the vehicle and a front portion of the seat cushion that is a front side of the vehicle, A vehicle having an occupant protection function by a vehicle seat device.

2. The movable member is a plate-shaped base portion extending in a front-rear direction from a front portion to a rear portion of the seat cushion under the seat cushion; a rear push-up portion that protrudes above the plate-shaped base portion from a rear portion of the plate-shaped base portion extending in the front-rear direction and has a width in the left-right direction of the vehicle; a front push-up portion that protrudes above the plate-shaped base portion from a front portion of the plate-shaped base portion extending in the front-rear direction and has a width in the left-right direction of the vehicle; the rear portion of the plate-shaped base portion is raised above the front portion, and thereby the rear push-up portion pushes up the rear portion of the seat cushion; the front portion of the plate-shaped base portion is raised above the rear portion, and thereby the front push-up portion pushes up the front portion of the seat cushion. A vehicle having an occupant protection function provided by the vehicle seat device according to claim 1.

3. At least the rear push-up portion of the front push-up portion and the rear push-up portion of the movable member is formed in a comb shape that avoids a plurality of folded elastic members provided to extend in the front-rear direction or the left-right direction on the seat cushion, The comb-shaped one of the front push-up portion and the rear push-up portion pushes up between the plurality of folded elastic members of the seat cushion. A vehicle having an occupant protection function provided by the vehicle seat device according to claim 2.

4. A headrest provided on an upper side of the seat back of the vehicle; A frame-shaped seat back frame that is aligned along the upper, lower, left, and right edges of the vehicle with respect to the seat back; a seatback cross member that connects an upper portion of the frame-shaped seatback frame in the left-right direction of the vehicle; having A vehicle having an occupant protection function provided by the vehicle seat device according to claim 3.

5. a rear actuator for pushing up a rear side of the plate-shaped base portion of the movable member higher than a front side of the plate-shaped base portion; a front actuator for pushing the front side of the plate-shaped base portion higher than the rear side thereof; an actuator for pushing the plate-shaped base portion upward; A control unit for controlling the operation of the actuator; an outside sensor for detecting an outside of the vehicle; having The control unit is When a frontal collision of the vehicle is predicted based on the detection result of the vehicle exterior sensor, it is determined whether or not the lower limbs of an occupant seated in the vehicle seat device are in a tense state. When the lower limbs of the occupant are in a tense state, the rear actuator is actuated before a frontal collision of the vehicle is detected to raise a rear side of the plate-shaped base portion of the movable member above a front side thereof, thereby pushing up the rear portion of the seat cushion; When the lower limbs of the occupant are not in a tense state, the front actuator is actuated before a front collision of the vehicle is detected, and the front side of the plate-shaped base part of the movable member is raised higher than the rear side thereof, thereby pushing up the front part of the seat cushion. A vehicle having an occupant protection function provided by the vehicle seat device according to any one of claims 1 to 4.

6. a seat belt device for restraining an occupant seated in the vehicle seat device, The control unit is When a frontal collision of the vehicle is predicted and the rear actuator or the front actuator is activated, the rear actuator or the front actuator is activated before the seat belt device is activated. A vehicle having an occupant protection function provided by the vehicle seat device according to claim 5.

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