JP2020163916A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat capable of preventing a submarine phenomenon of occupants, especially while inhibiting aggression of the occupant at a rear seat on the occupant at the front seat at a head-on collision.SOLUTION: A vehicular seat comprises: a seat cushion movable part 2d for inclining forwardly a seat cushion 2 so as to cause a seat surface 2a of the seat cushion 2 is inclined downward toward a front of a vehicle 100; a floor movable part F2 for descending a descending surface part F1 of a floor F on which feet pf an occupant M are placed; a control part 40 for activating the seat cushion movable part 2d to incline the seat cushion 2 forwardly and also activate the floor movable part F2 to descend a descending surface part F1 upon determining that the vehicle 100 is collided.SELECTED DRAWING: Figure 7

Description

The present invention relates to a vehicle seat mounted on a vehicle.

When a vehicle suddenly stops due to a frontal collision or a frontal collision prediction (hereinafter, may be collectively referred to as "frontal collision, etc."), the occupant wearing the seatbelt receives the inertial force to move forward. A so-called "submarine phenomenon" may occur in which the waist of the occupant tries to slip under the seat belt while sinking deeply into the seat cushion.

In particular, when a frontal collision occurs in the middle or high speed range where the vehicle travels at a certain speed or higher, the inertial force toward the front is large, so the lower leg of the occupant jumps up and the entire lower limb seems to be strongly pulled toward the front of the vehicle. Since it moves to the front side of the vehicle in a good shape, the occurrence rate of the submarine phenomenon increases.

In the following Patent Document 1, in order to suppress the submarine phenomenon that may occur at the time of a frontal collision from the viewpoint of occupant protection and prevent an excessive impact load from being applied to the occupant, a seatbelt is fastened at the time of a frontal collision of a vehicle or the like. A push-up body for pushing up the rear side of the occupant's lumbar region from the center of gravity toward the rear-upward direction is disclosed for a vehicle seat device supported by a seat pedestal below the seat cushion.

In this device, when a frontal collision of the vehicle is detected, gas is sent from the inflator to the airbag, which causes the airbag to expand momentarily and rearward the rear side of the occupant's lumbar region through the upper surface of the seat cushion. It is pushed upward to suppress the occurrence of the submarine phenomenon at the time of a frontal collision.

JP-A-2016-155512

The seat device disclosed in Patent Document 1 pushes up the lumbar region of the occupant from the rear to the upper side through the seat surface portion of the seat cushion at the time of a frontal collision or the like. However, with this seat device, only the effect of making the amount of subduction of the occupant's buttocks with respect to the seat cushion to the same amount as in the sitting posture before the collision can be obtained at the time of a frontal collision, and the submarine phenomenon occurs. Cannot be prevented.

In addition, when a submarine phenomenon occurs during a frontal collision, the rear seat occupants seated in the rear seats (rear seats) slip under the seat belt and move forward, and the knees are in the front seats (front seats). ) May collide with the back. At this time, if the knee of the rear seat occupant penetrates the back of the front seat and hits the back of the front seat occupant, the chest of the front seat occupant is strongly pressed by the seat belt and the knee, resulting in serious damage.

As described above, in the device of Patent Document 1, further improvements have been made in terms of suppressing the submarine phenomenon and suppressing the aggression of the rear seat occupants in the event of a frontal collision to protect the front seat occupants. There is room left.

An object of the present invention is to solve the above problems, and for a vehicle capable of preventing a submarine phenomenon of an occupant in a frontal collision of a vehicle or the like, and particularly suppressing aggression of a rear seat occupant to a front seat occupant. To provide a seat.

In order to achieve the above object, the vehicle seat of the present invention includes a seat cushion movable portion that tilts the seat cushion forward so that the seat surface of the seat cushion has a downward slope toward the front of the own vehicle, and a occupant's foot. When it is determined that the own vehicle collides with the floor movable portion that lowers the descending surface portion of the floor on which the vehicle is placed, the seat cushion movable portion is activated to tilt the seat cushion forward and the floor is movable. A control unit for operating the unit to lower the descending surface portion is provided.

Preferably, in the vehicle seat, the control unit operates the seat cushion movable portion and the floor movable portion before the collision when it is predicted that the own vehicle will collide in front.

Preferably, in the vehicle seat, when the control unit predicts that the own vehicle will collide from a direction other than the front direction, the operation of the seat cushion movable portion and the floor movable portion is stopped.

Preferably, in the vehicle seat, the control unit normalizes the occupant based on the occupant information output from the occupant information acquisition unit that acquires the occupant information including the posture information indicating the sitting posture of the occupant. When it is determined that the vehicle is not in the sitting posture, the operation of the seat cushion movable portion and the floor movable portion is stopped.

Preferably, in the vehicle seat, the control unit is based on the occupant information output from the occupant information acquisition unit that acquires the occupant information including at least one of the occupant's face information and the physique information. When it is determined that the occupant is a child, the operation of the seat cushion movable portion and the floor movable portion is stopped.

Preferably, the vehicle seat includes a seat back movable portion that tilts the seat back forward toward the front of the own vehicle, and the control unit determines that the own vehicle has collided in front of the vehicle or the self. When it is predicted that the vehicle will collide with the front, the seat back movable portion is operated to tilt the seat back forward.

According to the present invention, it is possible to prevent the submarine phenomenon of the occupant at the time of a frontal collision of the vehicle and to prevent the aggression of the occupant in the rear seat to the occupant in the front seat.

It is the schematic perspective view of the inside of the vehicle provided with the vehicle seat which concerns on this invention. It is a schematic perspective view of the sheet. It is a functional block diagram of the control part connected to the sheet. (A) and (b) are diagrams showing a form example of a seat cushion movable portion in the same seat. It is a figure which shows the morphological example of the seat back movable part in the seat. It is a figure which shows the form example of the floor movable part in the sheet, (a) is the figure which shows the state before the lowering surface part, and (b) is the figure which shows the state which the lowering surface part is lowered. (A) is a diagram showing the state of the vehicle seat and the posture of the occupant before the frontal collision in the same seat, and (b) is a diagram showing the state of the vehicle seat and the posture of the occupant at the time of the frontal collision in the same seat. is there.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment, and all other feasible embodiments, examples, operational techniques, etc. that can be considered by those skilled in the art based on this embodiment are included in the scope of the present invention. To do.

In the present specification, the "front-rear direction" coincides with the front-rear direction of the vehicle 100 (forward / backward direction of the vehicle 100), and the "left-right direction" corresponds to the left-right direction of the vehicle 100 (width direction of the vehicle 100). The "vertical direction" coincides with the vertical direction of the vehicle 100. Further, the "frontal collision" refers to a full-wrap frontal collision (symmetrical collision) with the vehicle 100.

[Overview of the inside of the vehicle]
First, the vehicle 100 provided with the vehicle seat 1 according to the present embodiment will be described.
As shown in FIG. 1, the vehicle (own vehicle) 100 on which the occupant M rides is a front seat (a front seat including a driver's seat in which a steering wheel (steering wheel) 103 is installed in front and a passenger's seat adjacent to the driver's seat. It includes a front seat (101) and a rear seat (rear seat) 102 arranged behind the front seat 101. The vehicle seat 1 according to the present embodiment can be applied to the front seat 101 and the rear seat 102.

[Vehicle seat configuration]
Next, the configuration of the vehicle seat 1 according to the present embodiment will be described.
As shown in FIG. 2, the vehicle seat 1 is installed on the floor F in the vehicle, and has a seat cushion 2 forming a seating surface for the occupant M and a lower end that rises diagonally rearward and upward from the rear end of the seat cushion 2. It is provided with a seat back 3 that contacts and forms a backrest surface of the occupant M, and a height-adjustable headrest 4 that holds the head of the occupant M.

The vehicle seat 1 may be provided in a state where the position is fixed with respect to the floor F, or the position in the front-rear direction with respect to the vehicle body can be changed along a seat rail (not shown) extending in the front-rear direction provided on the floor F. It may be provided in. Further, the vehicle seat 1 may be provided so that the seat itself can be rotated in a predetermined direction so that the seating direction of the occupant M can be changed in the front-rear direction.

As shown in FIG. 3, the vehicle seat 1 is connected to a control unit 40 that controls a seat cushion 2, a seat back 3, and a descending surface portion F1 described later in the event of a frontal collision or the like. The functions and processing contents of the control unit 40 will be described in detail later.

The seat cushion 2 is provided with a urethane foam member having elastic deformation characteristics and vibration damping characteristics so as to cover a metal base member (not shown) for imparting structural strength. A seat surface 2a on which the occupant M is seated is provided on the upper surface of the seat cushion 2.

The seat cushion 2 is provided so that the seat surface 2a tilts forward (toward the front seat 101 side) in a downward slope in the event of a frontal collision or the like, and the seat surface is actuated by the operation of the seat cushion movable portion 2d. 2a leans forward. The seat cushion movable portion 2d operates based on an operation instruction from the control unit 40.

As a configuration example of the seat cushion movable portion 2d, for example, as shown in FIG. 4, a configuration in which a drive portion 2f such as a motor is provided on a push-up member 2e that pushes up the rear end portion 2c of the seat cushion 2 toward the front, FIG. As shown in (b), in the event of a frontal collision, such as a configuration in which a gas generating part (inflator) (not shown) is activated to supply gas into the airbag body and the seat cushion airbag 2g expands and expands to tilt the seat surface 2a forward. The mechanism is not particularly limited as long as it is a mechanism for tilting the seat surface 2a of the seat cushion 2 forward.

The seat back 3 is provided with a urethane foam member having elastic deformation characteristics and vibration damping characteristics so as to cover a metal frame (not shown) for imparting structural strength. The lower end 3a of the seat back 3 is oscillatingly connected to the rear end 2c of the seat cushion 2 in the front-rear direction. When the seat back movable portion 3b operates at the time of a frontal collision or the like, the seat back 3 tilts forward so as to push the back portion of the occupant M. The seat back movable portion 3b operates based on an operation instruction from the control unit 40. The seat back 3 tilts forward in the event of a frontal collision or the like and pushes the back of the occupant M forward to promote a change from the flexed state to the extended state of the lower limbs of the occupant M, thereby further restricting the movement direction of the occupant M. Can be strengthened.

As a configuration example of the seat back movable portion 3b, as shown in FIG. 5, for example, a configuration in which a drive portion 3d such as a motor is provided on a support shaft 3c provided at the lower end portion 3a, the seat back 3 is provided at the time of a frontal collision or the like. The mechanism is not particularly limited as long as it can tilt forward.

The headrest 4 is provided with a urethane foam member having elastic deformation characteristics and vibration damping characteristics so as to cover a metal frame (not shown) for imparting structural strength. The headrest 4 is provided so as to be movable in the vertical direction according to the position of the head of the occupant M. The headrest 4 can be provided so as to be swingable in the front-rear direction with the lower end thereof as a fulcrum.

[Floor composition]
The floor F is provided with a descending surface portion F1 in which the feet of the occupant M are placed, and the feet of the occupant M are lowered together with the feet in the event of a frontal collision. The descending surface portion F1 is normally arranged on the same surface as the floor F, and descends at the time of a frontal collision or the like. The floor movable portion F2 lowers the descending surface portion F1 based on an operation instruction from the control unit 40.

As a configuration example of the floor movable portion F2, as shown in FIGS. 6A and 6B, for example, a support member F3 formed of a pantograph mechanism that can be expanded and contracted in the vertical direction with respect to the lower surface (back surface) of the descending surface portion F1. The mechanism is not particularly limited as long as the lowering surface portion F1 can move downward in the event of a frontal collision or the like, such as a configuration in which a driving portion F4 such as a motor is provided on the support member F3.

The moving distance (descent distance) from which the descending surface portion F1 descends is based on the length of the lower limbs of a general adult, and the lower limbs extend from the bent state with the sole of the occupant M in contact with the descending surface portion F1 at the time of a frontal collision or the like. It is set to a distance where it is easy to step on in a state.

[Other configurations mounted on the vehicle]
When the vehicle 100 executes forward tilt control of the seat cushion 2, forward tilt control of the seat back 3, and lowering control of the descending surface portion F1 of the floor F (hereinafter, these controls are collectively referred to as "occupant protection control"). It includes a collision detection unit 10, a collision prediction unit 20, and an occupant information acquisition unit 30 that acquire necessary information.

The collision detection unit 10 is composed of, for example, an acceleration sensor, and detects the acceleration of the vehicle 100 in the front-rear direction. Further, the collision detection unit 10 may be an acceleration sensor that detects acceleration in the left-right direction and the up-down direction in addition to the front-rear direction of the vehicle 100. The collision detection unit 10 detects the impact of a collision acting on the vehicle 100 and outputs an electric signal corresponding to the acceleration to the control unit 40 as collision detection information.

The collision prediction unit 20 uses an in-vehicle camera that images the front of the vehicle 100 to detect obstacles and irradiates radio waves such as millimeter waves in front of the vehicle 100 to reflect millimeters reflected from obstacles existing in front of the vehicle 100. It consists of a pre-crash safe sensor such as an in-vehicle radar that receives waves (reflected waves) and detects obstacles. Obstacles include moving objects such as pedestrians, motorcycles and four-wheeled vehicles (other vehicles), such as falling objects on the road, traffic lights, guardrails, curbs, road signs, trees and buildings. You may be.

The collision prediction unit 20 detects the position of the obstacle (distance between the vehicle 100 and the obstacle), the moving direction and the moving speed (relative speed) of the obstacle with respect to the vehicle 100, and detects the obstacle of the vehicle 100. Predict a frontal collision with an object. When a collision is predicted, the time until the obstacle collides with the vehicle 100, the position on the vehicle 100 where the obstacle collides is predicted, and the information regarding the collision prediction time and the information regarding the collision prediction position are included. The collision prediction information is output to the control unit 40.

The occupant information acquisition unit 30 is an image pickup device having a camera function using a solid-state image pickup element such as a CCD camera or a CMOS camera. The occupant information acquisition unit 30 is installed on, for example, the upper surface of the instrument panel of the vehicle 100, and acquires the interior of the vehicle 100 as an image. In the present embodiment, the captured image acquired by the occupant information acquisition unit 30 is analyzed and processed by the control unit 40, so that the age, sitting posture, and the like of the occupant M in this image can be known. The occupant information acquisition unit 30 outputs an image captured by capturing the inside of the vehicle to the control unit 40 as occupant information for determining the age and sitting posture of the occupant M.

The occupant information may include at least one of the posture information indicating the sitting posture of the occupant M, the face information of the occupant M, and the physique information indicating the size of the physique of the occupant M. That is, the occupant information acquisition unit 30 may have a configuration in which necessary information can be acquired depending on whether or not the occupant protection control can be executed by the determination unit 41.

[Control unit configuration]
The control unit 40 is composed of a well-known microcomputer (ECU: Electronic Control Unit) including a CPU and various memories (ROM, RAM), and comprehensively performs various controls on the vehicle seat 1. The control unit 40 includes a determination unit 41 and an instruction unit 42. The control unit 40 may be mounted on the vehicle seat 1 itself or may be mounted at a predetermined position on the vehicle 100, as long as the occupant protection control on the vehicle seat 1 can be executed. In the present embodiment, the control unit 40 is provided on the vehicle seat 1.

The determination unit 41 determines whether or not the vehicle 100 has collided in front based on the collision detection information input from the collision detection unit 10. When the determination unit 41 determines that the vehicle 100 has collided in front of the vehicle, the determination unit 41 outputs a control instruction for executing the occupant protection control to the instruction unit 42. Further, the determination unit 41 determines whether or not the vehicle 100 is likely to collide in front based on the collision prediction information input from the collision prediction unit 20. When the determination unit 41 determines that the vehicle 100 is likely to collide in front, it outputs a control instruction for executing the occupant protection control to the instruction unit 42.

On the other hand, the determination unit 41 determines that there is a high possibility that the vehicle 100 will collide from a direction other than the front direction based on the input collision detection information, or that the vehicle 100 will collide from a direction other than the front direction based on the collision prediction information. When the determination is made, the control instruction for executing the occupant protection control is not output to the instruction unit 42, and the execution of the occupant protection control is stopped.

When the vehicle 100 receives a collision other than a frontal collision such as a side collision, the direction of the impact received by the occupant M and the moving direction due to the inertial force are different from those at the time of the frontal collision. Therefore, it is unlikely that the submarine phenomenon will occur in a collision other than a frontal collision. Rather, by tilting the seat cushion 2 and the seat back 3 forward or lowering the descending surface portion F1, the seating posture of the occupant M is reduced. There is a risk that the occupant M will be seriously damaged in the event of a collision. For this reason, it is preferable to execute the occupant protection control only at the time of a frontal collision or when there is a high possibility of a frontal collision.

Further, the determination unit 41 analyzes the captured image in the vehicle included in the occupant information from the occupant information acquisition unit 30, and determines whether or not the seating posture of the occupant M is a normal sitting posture. When the determination unit 41 determines that the occupant M is in the normal sitting posture, the determination unit 41 outputs a control instruction for executing the occupant protection control to the instruction unit 42.

On the other hand, when the determination unit 41 determines that the seating posture of the occupant M is not the normal sitting posture, the determination unit 41 does not output a control instruction for executing the occupant protection control to the instruction unit 42 and stops the execution of the occupant protection control. To do.

When the seating posture of the occupant M is not the normal sitting posture, the direction of the impact received by the occupant M and the moving direction due to the inertial force are different from the normal sitting posture. Therefore, if the occupant protection control is executed when the seating posture is not the normal one, the sitting posture of the occupant M may be lost, and the occupant M may be seriously damaged in the event of a collision or the like. For this reason, it is preferable to execute the occupant protection control only when the seating posture of the occupant M is normal.

Further, the determination unit 41 analyzes the captured image in the vehicle included in the occupant information from the occupant information acquisition unit 30, and when it is determined that the occupant M is an adult, gives a control instruction for executing the occupant protection control. Output to the indicator 42.

On the other hand, the determination unit 41 analyzes the captured image in the vehicle included in the occupant information from the occupant information acquisition unit 30, and when it is determined that the occupant M has a child, instructs a control instruction for executing the occupant protection control. The execution of the occupant protection control is stopped without outputting to the unit 42.

When the occupant M is a child, if the occupant protection control is executed at the time of a frontal collision or the like, for example, the seat cushion 2 is tilted forward, which makes it easier to slip through from the lower side of the seat belt, or the lowered descending surface portion F1. There is a risk that it will not protect the occupant M, such as the soles of the feet not coming into contact with each other. For this reason, it is preferable to execute the occupant protection control only when the occupant M is an adult.

When the instruction unit 42 inputs a control instruction indicating the execution of the occupant protection control from the determination unit 41, the instruction unit 42 outputs an operation instruction to the seat cushion movable portion 2d, the seat back movable portion 3b, and the floor movable portion F2. As a result, the seat cushion 2 and the seat back 3 are tilted forward, and the descending surface portion F1 is lowered.

[Vehicle seat operation]
Next, the operation of the vehicle seat 1 of the present embodiment will be described. Here, an operation when a frontal collision is detected by the collision detection unit 10 will be described as an example.

As shown in FIG. 7A, the vehicle seat 1 is in a normal state, that is, the occupant protection control is not executed before the frontal collision is detected, and the seat cushion movable portion 2d and the seat back movable portion 3b. And the floor movable part F2 is not operating.

Next, when a frontal collision of the vehicle 100 is detected, the collision detection unit 10 detects that the vehicle 100 has collided, and when the determination unit 41 determines that the vehicle 100 has collided with the front, the occupant of the instruction unit 42 Outputs control instructions for executing protection control. The instruction unit 42 outputs an operation instruction to the seat cushion movable portion 2d, the seat back movable portion 3b, and the floor movable portion F2 in accordance with the control instruction from the determination unit 41.

When the operation instruction is input, the seat cushion movable portion 2d tilts the seat cushion 2 forward as shown in FIG. 7B. When the operation instruction is input, the seat back movable portion 3b tilts the seat back 3 forward as shown in FIG. 7 (b). When the operation instruction is input, the floor movable portion F2 lowers the descending surface portion F1 as shown in FIG. 7B.

The vehicle seat 1 is in the state shown in FIG. 7B when the occupant protection control is executed. As a result, the lumbar region of the occupant M in the sitting posture rises from the seat surface 2a, and the lower limbs of the occupant M approach the extended state from the flexed state, and the moving direction of the lower limbs faces the floor F from the front. Therefore, the occupant M is in a posture in which the occupant M can easily apply the tension so as not to move forward at the time of a frontal collision with the sole of the foot touching the descending surface portion F1. Therefore, the occupant M can resist the forward inertial force at the time of a frontal collision, and as a result, the occurrence of the submarine phenomenon is prevented.

[Action effect]
As described above, the vehicle seat 1 according to the present embodiment includes the seat cushion movable portion 2d that tilts the seat cushion 2 forward so that the seat surface 2a of the seat cushion 2 has a downward slope toward the front of the vehicle 100. When it is determined that the vehicle 100 collides with the floor movable portion F2 that lowers the descending surface portion F1 of the floor F on which the foot of the occupant M is placed, the seat cushion movable portion 2d is operated to move the seat cushion 2 forward. It is configured to include a control unit 40 that tilts and operates the floor movable portion F2 to lower the descending surface portion F1.

As a result, the occupant M is in a posture in which it is easy to apply tension so as not to move forward in a frontal collision, and can resist the forward inertial force in a frontal collision, so that the occurrence of the submarine phenomenon is prevented. To. Further, by preventing the submarine phenomenon, the chest aggression of the occupant M seated in the rear seat to the occupant M in the front seat is also suppressed in the event of a frontal collision.

Further, in the vehicle seat 1 according to the present embodiment, the control unit 40 is configured to operate the seat cushion movable portion 2d and the floor movable portion F2 before the front collision when the vehicle 100 is predicted to collide with the front. ing.

As a result, the control unit 40 can operate the seat cushion movable portion 2d and the floor movable portion F2 at the time when the frontal collision is predicted, so that the submarine phenomenon that may occur at the time of the frontal collision is prevented and the safety of the occupant M is prevented. Sex can be ensured.

Further, in the vehicle seat 1 according to the present embodiment, when the control unit 40 predicts that the vehicle 100 will collide from a direction other than the front direction, the operation of the seat cushion movable portion 2d and the floor movable portion F2 is stopped. It has become.

As a result, when a collision other than a frontal collision is predicted, the occupant M is prevented from collapsing the sitting posture that may occur by executing the forward tilt control of the seat cushion 2 and the lowering control of the descending surface portion F1. It is possible to prevent the occupant M from being seriously damaged in the event of a collision or the like.

Further, in the vehicle seat 1 according to the present embodiment, the control unit 40 acquires the occupant information including the posture information indicating the sitting posture of the occupant M based on the occupant information output from the occupant information acquisition unit 30. When it is determined that M is not in the normal sitting posture, the operation of the seat cushion movable portion 2d and the floor movable portion F2 is stopped.

As a result, when the occupant M is in a sitting posture other than the normal sitting posture, the collapse of the sitting posture that may occur by executing the forward tilt control of the seat cushion 2 and the lowering control of the descending surface portion F1 is prevented. It is possible to prevent the occupant M from being seriously damaged in the event of a collision or the like.

Further, in the vehicle seat 1 according to the present embodiment, the control unit 40 obtains the occupant information including at least one of the face information and the physique information of the occupant M in the occupant information output from the occupant information acquisition unit 40. Based on this, when it is determined that the occupant M is a child, the operation of the seat cushion movable portion 2d and the floor movable portion F2 is stopped.

As a result, the child, who is the occupant M, is prevented from collapsing the sitting posture that may occur due to the forward tilt control of the seat cushion 2 and the lowering control of the descending surface portion F1, and the occupant M is serious in the event of a collision or the like. It is possible to prevent damage.

Further, when the vehicle seat 1 according to the present embodiment includes a seat back movable portion 3b that tilts the seat back 3 forward toward the front of the vehicle 100, and the control unit 40 determines that the vehicle 100 has collided in front. Alternatively, when it is predicted that the vehicle 100 will collide with the front, the seat back movable portion 3b is operated to tilt the seat back 3 forward.

As a result, in addition to the forward tilt control of the seat cushion 2 and the lowering control of the descending surface portion F1, the occupant M pushes the back portion forward by the seat back 3, so that the flexed state of the lower limbs is in the extended state. Prompted. Therefore, the occupant M is in a posture in which it is easy to apply tension so as not to move forward in a frontal collision, and can resist the forward inertial force in a frontal collision, so that the occurrence of the submarine phenomenon is prevented. ..

[Other Embodiments]
The present invention is not limited to the above embodiment, and can be appropriately modified and implemented according to the usage environment and the like as shown below. Further, the following modifications can be carried out in any combination within a range that does not deviate from the gist of the present invention.

In the above-described embodiment, the vehicle seat 1 has been described with a configuration in which an operation instruction is output to each of the seat cushion movable portion 2d, the floor movable portion F2, and the seat back movable portion 3b to drive the vehicle seat 1 as occupant protection control. Not done. Even if the vehicle seat 1 is configured to operate at least the seat cushion movable portion 2d and the floor movable portion F2, the effect of preventing the occurrence of the submarine phenomenon can be sufficiently exhibited.

In the above-described embodiment, the determination unit 41 has been described with a configuration in which the seating posture of the occupant M is determined based on the occupant information which is an image captured by the occupant information acquisition unit 30 to determine whether or not the occupant protection control can be executed. Not limited to. As another example of the configuration of the occupant information acquisition unit 30, for example, a feeling of detecting the posture of the occupant M at a portion of the seat surface 2a that contacts the buttocks of the occupant M and a portion of the seat back 3 that abuts with the back portion of the occupant M. It is also possible to incorporate a pressure sheet to acquire the positions of the buttocks and back in the sitting posture of the occupant M. In this case, the determination unit 41 inputs the position information of the buttocks and the back of the occupant M acquired by the occupant information acquisition unit 30 as the occupant information, and the sitting posture of the occupant M is normal based on the occupant information. It is also possible to determine whether or not the occupant protection control can be executed by determining whether or not the vehicle is in the sitting posture.

In the above-described embodiment, when the occupant M is a child, the occupant protection control is not executed in the event of a frontal collision or the like, but the present invention is not limited to this. For example, when the determination unit 41 determines that the occupant M is a child, the determination unit 41 issues a control instruction to control the seat cushion movable portion 2d, the seat back movable portion 3b, and the floor movable portion F2 with a movable amount according to the physique of the child. It is also possible to output to the indicator 42. Further, the instruction unit 42 may be configured to output an operation instruction to move the seat cushion movable portion 2d, the seat back movable portion 3b, and the floor movable portion F2 with a movable amount suitable for the child. In this way, by adjusting the movable amount of each part according to the age of the occupant M, it is possible to achieve the effect of preventing the submarine phenomenon regardless of the age of the occupant M.

[Other]
In the above-described embodiment, the vehicle seat 1 corresponds to an example of the "vehicle seat" described in the claims. The seat cushion 2 corresponds to an example of the "seat cushion" described in the claims. The seat surface 2a corresponds to an example of the "seat surface" described in the claims. The seat cushion movable portion 2d corresponds to an example of the “seat cushion movable portion” described in the claims. The seat back 3 corresponds to an example of the "seat back" described in the claims. The seat back movable portion 3b corresponds to an example of the “seat back movable portion” described in the claims. It corresponds to an example of the occupant information acquisition unit 30, the “occupant information acquisition unit” described in the claims. The control unit 40 corresponds to an example of the "control unit" described in the claims. The vehicle 100 corresponds to an example of the "own vehicle" described in the claims. Floor F corresponds to an example of the "floor" described in the claims. The descending surface portion F1 corresponds to an example of the "descending surface portion" described in the claims. The floor movable portion F2 corresponds to an example of the “floor movable portion” described in the claims. Crew M corresponds to an example of the "crew" described in the claims.

The terms used in the above embodiments and claims should be construed as non-limiting terms. For example, the term "contains" should be construed as "not limited to what is described as including." The term "prepared" should be construed as "not limited to what is described as prepared." The term "have" should be construed as "not limited to what is described as having."

1 Vehicle seat, 2 Seat cushion (2a seat surface, 2b front end, 2c rear end, 2d seat cushion movable part, 2e push-up member, 2f drive part, 2g seat cushion airbag), 3 seat back (3a lower end) 3b Seat back movable part, 3c support shaft, 3d drive part), 4 headrest, 10 collision detection part, 20 collision prediction part, 30 occupant information acquisition part, 40 control part, 41 judgment part, 42 indicator part, 100 vehicle, 101 front seats (front seats), 102 rear seats (rear seats), 103 steering wheel (steering wheel), F car floor, F1 descending surface, F2 floor movable parts, F3 support members, F4 drive parts, M occupants

Claims (6)

A seat cushion movable part that tilts the seat cushion forward so that the seat surface of the seat cushion has a downward slope toward the front of the own vehicle.
A floor movable part that lowers the descending surface of the floor on which the occupant's feet are placed,
When it is determined that the own vehicle has collided, the seat cushion movable portion is operated to tilt the seat cushion forward, and the floor movable portion is operated to lower the descending surface portion.
To prepare
Vehicle seat. When the control unit predicts that the own vehicle will collide with the front, the control unit operates the seat cushion movable portion and the floor movable portion before the collision.
The vehicle seat according to claim 1. When the control unit predicts that the own vehicle will collide from a direction other than the front direction, the operation of the seat cushion movable portion and the floor movable portion is stopped.
The vehicle seat according to claim 1 or 2. When the control unit determines that the occupant is not in the normal sitting posture based on the occupant information output from the occupant information acquisition unit that acquires the occupant information including the posture information indicating the seating posture of the occupant, Stopping the operation of the seat cushion movable portion and the floor movable portion,
The vehicle seat according to any one of claims 1 to 3. When the control unit determines that the occupant is a child based on the occupant information output from the occupant information acquisition unit that acquires occupant information including at least one of the occupant's face information and physique information. Stops the operation of the seat cushion movable portion and the floor movable portion.
The vehicle seat according to any one of claims 1 to 4. A seat back movable part that tilts the seat back forward toward the front of the own vehicle is provided.
When the control unit determines that the own vehicle has collided in the front or predicts that the own vehicle will collide in the front, the control unit operates the seat back movable portion to tilt the seat back forward.
The vehicle seat according to any one of claims 2 to 5.