JP7188433B2 - Vehicle seat and vehicle - Google Patents

Description

The present invention relates to a vehicle seat and a vehicle.

Patent Literature 1 below discloses a vehicle driving support device and a vehicle driving support method for controlling a reclining angle adjustment unit so that the reclining angle in the automatic driving mode is larger than the reclining angle in the manual driving mode. .

In addition, in a vehicle seat used in a vehicle that can switch between a manual driving state and an automatic driving state, the position and posture of the relax position (comfortable posture) is calculated according to the physique of the driver, so that the driver can move the seat. Patent Document 2 discloses a configuration that automatically achieves the optimum relaxation position without adjusting the amount. In addition, in a vehicle seat control device used in a vehicle that can switch between a manual operation state and an automatic operation state, when the manual operation state is shifted to the automatic operation state, the seat back is reclined and the seat cushion is tilted. There is one described in Document 3. Further, Japanese Patent Laid-Open No. 2002-200000 discloses a vehicle seat that allows relative displacement of each part of the seat in an automatic driving state over a wider range than in a manual driving state. Further, Patent Document 5 describes a driving position control device that moves from a first position suitable for driving during manual operation to a second position that is a relaxed posture when switching from manual operation to automatic operation. be. Furthermore, Patent Documents 6 and 7 disclose occupant head restraint devices for side collisions that protect the occupant's head with a headrest in the event of a side collision.

International Publication No. 2015/011866 pamphlet JP 2017-132383 A JP 2017-136898 A JP 2017-170942 A JP 2016-168972 A JP 2010-125942 A JP 2010-137666 A

In the configuration described in Patent Literature 1, if the seat back is greatly tilted backward in the automatic driving mode to take a comfortable posture (relaxed posture), there is a possibility that the occupant's head will be out of the head protection area of the curtain airbag. For this reason, it is thought that the head of the passenger cannot be restrained sufficiently by the curtain airbag in the event of a side collision in a comfortable posture, and there is room for improvement.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat and a vehicle that can protect the occupant's head during a side collision.

A vehicle seat according to a first aspect is a vehicle seat provided in a vehicle equipped with a head protection airbag that protects the head of an occupant in the event of a side collision, and the seat is provided so as to be tiltable backward from a standing state. A head restraining portion that restrains the occupant's head is provided on the upper side of the back, and when the seat back is tilted backward beyond a predetermined angle with respect to the vertical direction, the head restraining portion is positioned at least in the width direction of the vehicle. The outer side portion covers the sides of the occupant's head so as to protect the occupant's head.

According to the vehicle seat of the first aspect, the head restraining portion that restrains the occupant's head is provided on the upper side of the seat back that is provided so that it can be tilted backward (that is, reclinable) from the upright state. ing. When the seatback is tilted backward beyond a predetermined angle with respect to the vertical direction, at least the vehicle width direction outer side portion of the head restraint portion covers the sides of the occupant's head. As a result, in the case of a comfortable posture in which the seat back is greatly tilted backward, the occupant's head can be protected from a side collision by at least the side portion of the head restraint portion on the outer side in the vehicle width direction.

A vehicle seat according to a second aspect is the vehicle seat according to the first aspect , wherein a side portion on the vehicle width direction outer side of the head restraint portion incorporates a hard pad, and a rear portion of the seat back. At least the vehicle width direction outer side portion of the head restraint portion protrudes forward of the seat when the vehicle is tilted.

According to the vehicle seat according to the second aspect, the side portion of the head restraint portion on the vehicle width direction outer side incorporates a hard pad, and when the seat back is tilted backward, the head restraint portion is at least the width of the vehicle width. The side portion on the direction outer side protrudes forward of the seat. As a result, when the seatback is tilted backward, the sides of the occupant's head are covered by the side part of the head restraint part that incorporates a hard pad on the outside in the vehicle width direction, effectively protecting the occupant's head from side collisions. can be protected against

A vehicle seat according to a third aspect is the vehicle seat according to the first aspect or the second aspect , wherein the vehicle can be switched between an automatic operation mode and a manual operation mode, and the automatic operation mode is switched to the automatic operation mode. When the seatback is tilted backward, the side portions of the head restraint portion are configured to protrude forward of the seat.

According to the vehicle seat according to the third aspect, in the case of the comfortable posture in which the seat back is greatly tilted backward in the automatic driving mode, the side portion of the head restraint portion protrudes forward of the seat, thereby restraining the head. The sides of the occupant's head are covered by the side portions of the portion. Therefore, the occupant's head can be effectively protected from a side collision. Also, in the automatic driving mode, the lateral visibility of the occupant is not as important as in the manual driving mode, so the protruding side portion of the head restraint portion is less likely to interfere with the lateral visibility of the occupant.

A vehicle seat according to a fourth aspect is the vehicle seat according to the third aspect , wherein the side portion of the head restraint portion does not protrude forward of the seat when the seatback is tilted backward in the manual operation mode. It is configured.

According to the vehicle seat of the fourth aspect, when the seatback is tilted backward in the manual driving mode, the side portions of the head restraint portion do not protrude forward of the seat. There is no hindrance.

A vehicle seat according to a fifth aspect is the vehicle seat according to the third aspect or the fourth aspect , wherein when the seatback is tilted backward in the manual operation mode, the side of the head restraint portion is tilted in the driver's seat. In the front passenger seat, the side portion of the head restraint portion protrudes forward in the seat.

According to the vehicle seat of the fifth aspect, when the seatback is tilted backward in the manual operation mode, the side portion of the head restraint portion projects forward in the front passenger seat, so that the driver is seated on the front passenger seat after a side collision. It is possible to effectively protect the head of the occupant. Also, an occupant seated in the front passenger seat who is not involved in driving can take a relaxed position by tilting the seatback backward.

A vehicle seat according to a sixth aspect is a vehicle seat according to any one of the first aspect to the fifth aspect , wherein the head restraint portion extends forwardly of the vehicle width direction outer side portion of the vehicle seat. is larger than the amount of protrusion of the side portion of the head restraint portion on the inner side in the vehicle width direction toward the front of the seat.

According to the vehicle seat according to the sixth aspect, by making the amount of protrusion of the side portion of the head restraint portion on the vehicle width direction outer side larger than the protrusion amount of the side portion of the head restraint portion on the vehicle width direction inner side, The occupant's head can be effectively protected from a side collision.

A vehicle seat according to a seventh aspect is the vehicle seat according to any one of the first to sixth aspects , wherein the head restraint portion is provided separately from the seat back. There is a headrest.

According to the vehicle seat according to the seventh aspect, the head restraint portion is a headrest provided separately from the seatback. can be moved.

A vehicle according to an eighth aspect includes a vehicle seat according to any one of the first to seventh aspects , and a roof headlining provided on the back side of the vehicle width direction outer end of the roof headlining. A head protection airbag that inflates and deploys downward in the vehicle vertical direction at the time of a collision to protect the head of an occupant is provided, and can be switched between an automatic operation mode and a manual operation mode.

According to the vehicle of the eighth aspect, when the seatback is tilted rearward by more than the predetermined angle with respect to the vertical direction, at least the laterally outer side portion of the head restraint portion faces the occupant's head. occupant's head can be protected in the event of a side collision.

According to the vehicle seat and vehicle of the present invention, the occupant's head can be protected during a side collision.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the vehicle seat which concerns on 1st Embodiment. FIG. 2 is a plan cross-sectional view along the vehicle width direction, showing the headrest used in the vehicle seat according to the first embodiment; 1 is a block diagram showing the configuration of a vehicle seat control device according to a first embodiment; FIG. FIG. 4 is a diagram comparing the position of the side portion of the headrest with respect to the seat back angle in the manual operation mode and the automatic operation mode in the vehicle seat according to the first embodiment; 4 is a flow chart showing an example of the control flow of the controller for the driver's seat in the vehicle seat according to the first embodiment; FIG. 2 is a schematic side view showing a state in which the seat back is tilted rearward beyond a predetermined angle with respect to the vertical direction in the vehicle provided with the vehicle seat according to the first embodiment; FIG. 3 is a plan sectional view corresponding to FIG. 2 showing a headrest used in a vehicle seat according to a second embodiment; FIG. 11 is a block diagram showing the configuration of a control device for a vehicle seat according to a third embodiment; FIG. 10 is a diagram comparing the positions of the side portions of the headrest with respect to the seat back angles of the driver's seat and the passenger's seat in the manual operation mode and the automatic operation mode in the vehicle seat according to the third embodiment; FIG. 11 is a flow chart showing an example of the control flow of a control device for a front passenger seat in a vehicle seat according to a third embodiment; FIG. FIG. 11 is a plan sectional view corresponding to FIG. 2 showing a headrest used in a vehicle seat according to a fourth embodiment; FIG. 11 is a plan sectional view corresponding to FIG. 2 showing a headrest used in a vehicle seat according to a fifth embodiment; FIG. 10 is a schematic side view showing a state in which the seat back is tilted backward beyond a predetermined angle with respect to the vertical direction in the vehicle provided with the vehicle seat according to the comparative example.

An embodiment of the present invention will be described in detail with reference to the drawings. In these drawings, an arrow FR indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side (RH). In addition, in the embodiment of the present invention, the front of the seat, the width direction of the seat, and the top of the seat substantially match the front of the vehicle, the width direction of the vehicle, and the top of the vehicle, respectively. and write it down.

[First embodiment]
A vehicle seat according to a first embodiment will be described with reference to FIGS. 1 to 6. FIG. Also, each drawing is schematic, and the illustration of those less relevant to the present invention is omitted.

(Structure of vehicle seat)
As shown in FIG. 1, a vehicle seat (hereinafter simply referred to as "seat") 10 according to the present embodiment includes a seat cushion 12 on which an occupant P is seated, and a rear end portion of the seat cushion 12 that supports the back of the occupant P. a supporting seat back 14; A headrest 16 is attached to the upper end portion of the seat back 14 as a head restraint portion that restrains the head of the occupant. The headrest 16 is provided separately from the seat back 14 on the upper side of the seat back 14 . In this embodiment, the headrest 16 is attached to the seatback 14 via a headrest stay 15 that is axially movable with respect to the seatback 14 .

The seat 10 is, for example, a driver's seat provided on the driver's seat side on the right side of the vehicle front seat in the passenger compartment 102 of the vehicle 100 . The occupant P seated on the seat 10 is shown as a dummy.

The seat 10 has a reclining function of tilting the seat back 14 backward (tilting toward the rear side of the vehicle) from an upright state. More specifically, the seat 10 includes a seatback angle changing section (reclining mechanism) 20 that changes the angle α of the seatback 14 with respect to the vertical direction. As an example, the seatback angle changing unit 20 rotatably rotates a rotating shaft (reclining rod) 20A connected to a rod (not shown) arranged in the vehicle width direction at the lower end of the seatback 14 and the rotating shaft 20A. It has a guide portion 20B for supporting and a driving portion (not shown) for rotating the rotating shaft 20A. The guide portion 20B is provided on the side portion of the seat cushion 12 . A drive unit that rotates the rotating shaft 20A is configured by, for example, a motor.

The seat 10 includes a seatback angle detection section 22 (see FIG. 3) that detects the angle α of the seatback 14 with respect to the vertical direction. Although not shown, the seatback angle detection section 22 is provided at a position facing the rotation shaft 20A in the guide section 20B, for example.

The seat 10 is provided with a seat belt device 24 having a shoulder belt 24A for restraining the occupant P. As shown in FIG. Also, the seat cushion 12 is provided slidably in the vehicle front-rear direction along rails 26 fixed to the floor 104 of the vehicle 100 .

As shown in FIG. 2, the headrest 16 is arranged along the vehicle width direction above the seat back 14, and has a horizontally long shape whose length in the vehicle width direction is longer than the length in the vehicle front-rear direction. It is The headrest 16 is arranged on both sides in the vehicle width direction of the body portion 16A facing the head (occupant's head) H of the occupant P seated on the seat 10 at the middle portion in the vehicle width direction (seat width direction). and the side portions 16B and 16C. When viewed from the rear of the vehicle (viewed from the rear side of the vehicle), the side portion 16B is arranged on the right side in the vehicle width direction (outside in the vehicle width direction in this embodiment), and the side portion 16C is arranged on the left side in the vehicle width direction (this in the vehicle width direction).

The seat 10 includes a side portion moving device 30 for projecting the side portions 16B and 16C from the body portion 16A of the headrest 16 toward the vehicle front (seat front). The side portion moving device 30 includes a first moving portion 30A for moving the side portion 16B and a second moving portion 30B for moving the side portion 16C. In the seat 10, for example, when the seat back 14 is not reclined, the side portions 16B and 16C are arranged at the normal position D1 on the longitudinal extension line of the body portion 16A. The first moving part 30A moves the side part 16B from the normal position D1 to the protruding position D2 that protrudes forward of the vehicle under a predetermined condition to be described later. Further, the second moving part 30B moves the side part 16C from the normal position D1 to the projecting position D2 projecting forward of the vehicle under a predetermined condition described later.

A frame 32 arranged along the width direction of the vehicle is provided inside the body portion 16A. A frame 34 arranged along the vehicle width direction is provided inside the side portion 16B, and a frame 36 arranged along the vehicle width direction is provided inside the side portion 16C. A pad 38 is provided inside the headrest 16 so as to surround the frames 32 , 34 , 36 , and a skin 40 is provided on the surface of the pad 38 . The pad 38 is made of foamed resin such as urethane foam, for example.

The first moving portion 30A includes a rotation shaft 42 inserted through a portion where the vehicle width direction outer end of the frame 32 and the vehicle width direction inner end of the frame 34 in the side portion 16B are overlapped. . The rotating shaft 42 is arranged substantially along the vehicle vertical direction of the headrest 16 . The rotating shaft 42 is joined (fixed) to the frame 34 and rotates together with the frame 34 . Further, the first moving section 30A includes a driving section 44 connected to the axial end of the rotating shaft 42 . The drive unit 44 is, for example, a motor that rotates the rotating shaft 42 .

In the first moving section 30A, the driving section 44 rotates the rotating shaft 42 in the forward direction (for example, counterclockwise in FIG. 2), thereby moving the side section 16B having the frame 34 forward from the normal position D1 toward the front of the vehicle. It is made to move to the protrusion position D2 which protrudes. In the first moving section 30A, the driving section 44 rotates the rotating shaft 42 in the reverse direction (for example, clockwise in FIG. 2) to return the side section 16B to the normal position D1. When the side portions 16B are moved to the projecting position D2, the sides of the head H of the occupant P are covered with the side portions 16B to protect the head H of the occupant P in a side collision.

Similarly, the second moving portion 30B has a rotating shaft 48 inserted through a portion where the vehicle width direction inner end of the frame 32 and the vehicle width direction outer end of the frame 36 in the side portion 16C are overlapped. I have. The rotating shaft 48 is arranged substantially along the vehicle vertical direction of the headrest 16 . The rotating shaft 48 is joined (fixed) to the frame 36 and rotates together with the frame 36 . Further, the second moving part 30B has a driving part 50 connected to the axial end of the rotating shaft 48 . The drive unit 50 is, for example, a motor that rotates the rotating shaft 48 .

In the second moving part 30B, the driving part 50 rotates the rotating shaft 48 in the forward direction (for example, clockwise in FIG. 2), thereby projecting the side part 16C including the frame 36 from the normal position D1 toward the front of the vehicle. It is designed to rotate to the protruding position D2. In the second moving section 30B, the driving section 50 rotates the rotating shaft 48 in the opposite direction (for example, counterclockwise in FIG. 2) to return the side section 16C to the normal position D1. . When the side portion 16C moves to the projecting position D2, the side portion 16C covers the side of the head H of the occupant P to protect the head H of the occupant P in a side collision.

(Configuration of seat control device)
FIG. 3 is a block diagram showing the configuration of a seat control device 60 that controls the position of the seat 10. As shown in FIG. Although illustration is omitted, the seat control device 60 is provided, for example, inside an instrument panel 106 (see FIG. 6) arranged on the front side in the vehicle front-rear direction inside the vehicle compartment 102 of the vehicle 100 . As shown in FIG. 3 , the seat control device 60 includes a seat 10 and a control section 62 that controls the position of the seat 10 .

The control unit 62 is composed of a computer in which a CPU 62A, a ROM 62B, a RAM 62C and an I/O (input/output interface) 62D are connected via a bus 62E.

A program for controlling the positions of the seat back 14 and the headrest 16 of the seat 10 is stored in the ROM 62B. The position of the headrest 16 is controlled.

The seat 10 to be controlled is connected to the I/O 62D, and the operation mode switching unit 64 and the automatic operation control unit 66 are also connected.

The seat 10 includes a seatback angle changing section 20 , and the operation of the seatback angle changing section 20 is controlled by the control section 62 . More specifically, the driving section (not shown) of the seatback angle changing section 20 is operated by the control section 62 to rotate the rotating shaft 20A (see FIG. 1). As a result, the seat back 14 is tilted backward (tilted toward the rear of the vehicle), or the seat back 14 is returned to the upright state.

The seat 10 includes a seatback angle detection section 22, and the seatback angle detection section 22 detects an angle α (see FIG. 1) of the seatback 14 with respect to the vertical direction. of the seat back 14 detected by the seat back angle detection section 22 is input to the control section 62 .

The seat 10 includes a side movement device 30 for the headrest 16 , and the operation of the side movement device 30 is controlled by the control section 62 . More specifically, the control section 62 operates the drive sections 44 and 50 (see FIG. 2) of the side section moving device 30 . As a result, the side portions 16B and 16C of the headrest 16 are moved to the projecting position D2 in front of the vehicle, or the side portions 16B and 16C are returned to the normal position D1 (see FIG. 2). The control unit 62 controls the operation of the side portion moving device 30 based on the angle α of the seat back 14 detected by the seat back angle detection unit 22 .

The operation mode switching unit 64 is capable of switching between a manual operation (normal operation) mode and an automatic operation mode. The passenger P can switch between the automatic operation mode and the manual operation mode by selecting either the automatic operation mode or the manual operation mode using the operation mode switching unit 64 . The driving mode switching unit 64 is provided, for example, on an instrument panel 106 (see FIG. 6) arranged inside the passenger compartment 102 of the vehicle 100 . When the passenger P selects the automatic driving mode, the automatic driving control unit 66 controls the running of the vehicle 100 .

The control unit 62 changes the control of the operation of the side portion moving device 30 as described later, depending on whether the manual operation mode is selected or the automatic operation mode is selected.

(Control of seat control device)
FIG. 4 shows the relationship between the angle .alpha. As shown in FIG. 4, in the manual operation mode, the side portions 16B and 16C of the headrest 16 are arranged at the normal position D1 (see FIG. 2) regardless of the angle α of the seat back 14 with respect to the vertical direction.

Further, in the automatic driving mode, when the angle α of the seat back 14 with respect to the vertical direction is equal to or less than a predetermined angle (for example, 45°), the normal state is assumed, and the side portions 16B and 16C of the headrest 16 are in the normal position D1. placed. In the automatic driving mode, when the angle .alpha. 2).

As shown in FIG. 6 , a vehicle 100 is provided with roof side rails 101 on the upper part of the vehicle and extending substantially in the longitudinal direction of the vehicle. A head protection airbag is provided on the inner side of the roof side rail 101 in the vehicle width direction and on the back side of the end portion of the roof headlining (not shown) on the outer side in the vehicle width direction to protect the head H of the occupant P in the event of a side collision. A curtain airbag 110 is provided as a Further, the vehicle 100 is provided with a front airbag 112 that protects the occupant P in the event of a frontal collision, on the steering handle 108 on the front side in the vehicle longitudinal direction. FIG. 6 shows a state in which the curtain airbag 110 and the front airbag 112 are deployed for easy understanding of the configuration. The curtain airbag 110 inflates and deploys downward in the vertical direction of the vehicle in the form of a curtain in the event of a side collision, and protects the head H of the occupant P in an area (protection area) overlapping the curtain airbag 110. .

In the seat 10 , if the seat back 14 is greatly tilted backward, there is a possibility that the head H of the occupant P seated on the seat 10 will be out of the protection area of the curtain airbag 110 . In this embodiment, the side portions 16B and 16C of the headrest 16 are moved to the projecting position D2 when the angle α (see FIG. 1) of the seatback 14 with respect to the vertical direction is greater than a predetermined angle (eg, 45°). As a result, the sides of the head H of the occupant P are covered with the side portions 16B and 16C (especially the side portion 16B on the outer side in the vehicle width direction) to protect the head H of the occupant P in the event of a side collision. Here, the predetermined angle of the seatback 14 with respect to the vertical direction is an angle at which the head H of the occupant P cannot be restrained by the curtain airbag 110 in the event of a side collision. there is

(Example of control flow of seat control device)
Next, an example of a specific processing flow performed by the control section 62 of the seat control device 60 will be described. FIG. 5 is a flow chart showing an example of the flow of control for changing the positions of the side portions 16B and 16C of the headrest 16 performed by the control section 62 of the seat control device 60. As shown in FIG.

As shown in FIG. 5, in step S80, the controller 62 determines whether or not the manual operation mode is set. When the determination is affirmative, the process proceeds to step S82.

At step S82, the control unit 62 places the side portions 16B and 16C of the headrest 16 at the normal position D1. For example, when the side portions 16B and 16C of the headrest 16 are originally at the normal position D1, the control unit 62 causes the side portions 16B and 16C of the headrest 16 to stand by at the normal position D1. Further, when the side portions 16B and 16C of the headrest 16 are at the projecting position D2, the control section 62 moves the side portions 16B and 16C of the headrest 16 to the normal position D1.

When the above determination is negative in step S80, the process proceeds to step S84. Moreover, when step S82 is performed, it transfers to step S84.

In step S84, it is determined whether the control unit 62 is in the automatic operation mode. When the determination is affirmative, the process proceeds to step S86. When the determination is negative, the process returns to step S80.

At step S86, the control unit 62 determines whether or not the angle α of the seat back 14 with respect to the vertical direction is greater than a threshold. In this embodiment, the threshold is 45 degrees. When the determination is affirmative, the process proceeds to step S88.

In step S88, the control unit 62 arranges the side portions 16B and 16C of the headrest 16 at the projecting position D2 in front of the vehicle. For example, when the side portions 16B and 16C of the headrest 16 are at the normal position D1, the control unit 62 moves the side portions 16B and 16C of the headrest 16 to the projecting position D2 in front of the vehicle.

When the above determination is negative in step S86, the process proceeds to step S90. In step S90, the control unit 62 places the side portions 16B and 16C of the headrest 16 at the normal position D1. For example, when the side portions 16B and 16C of the headrest 16 are originally at the normal position D1, the control unit 62 causes the side portions 16B and 16C of the headrest 16 to stand by at the normal position D1. When step S90 has been executed, the process returns to step S86.

In step S92, the control unit 62 determines whether or not the angle α of the seat back 14 with respect to the vertical direction is equal to or less than a threshold. The process waits until the determination is affirmative, and proceeds to step S94.

In step S94, the control unit 62 places the side portions 16B and 16C of the headrest 16 at the normal position D1. The control unit 62 moves the side portions 16B and 16C of the headrest 16 from the projecting position D2 to the normal position D1.

In step S96, the controller 62 determines whether or not the operation is stopped. When the determination is affirmative, the series of processes of the seat control device 60 are stopped. If the determination is negative, the process returns to step S80.

(Action and effect)
Next, the operation and effects of this embodiment will be described.

In the seat 10, the side portions 16B and 16C of the headrest 16 move the side of the head H of the occupant P when the seat back 14 is tilted backward beyond a predetermined angle (for example, 45°) with respect to the vertical direction. cover. In the present embodiment, the side portions 16B and 16C of the headrest 16 move from the normal position D1 to the forward projecting position D2 of the vehicle, so that the side portions 16B and 16C of the headrest 16 move the head H of the occupant P to the side. cover. As a result, in the case of a comfortable posture in which the seat back 14 is greatly tilted backward, the side portions 16B and 16C of the headrest 16 (especially the side portion 16B on the outer side in the vehicle width direction) protect the head H of the occupant P from a side collision. can do.

Further, the vehicle 100 having the seat 10 can be switched between an automatic driving mode and a manual driving mode. In this embodiment, in the case of a comfortable posture in which the seat back 14 is greatly tilted backward in the automatic driving mode (when the seat back 14 is tilted backward beyond a predetermined angle with respect to the vertical direction), the side portion of the headrest 16 16B and 16C protrude forward of the vehicle. As a result, the sides of the head H of the occupant P are covered by the side portions 16B and 16C of the headrest 16, so the head H of the occupant P can be effectively protected from a side collision. Further, in the automatic driving mode, the lateral visibility of the occupant P is not as important as in the manual driving mode, so the protruding side portions 16B and 16C of the headrest 16 are less likely to interfere with the lateral visibility of the occupant P.

Further, the seat 10 is configured so that the side portions 16B and 16C of the headrest 16 do not protrude forward of the vehicle when the seat back 14 is tilted backward in the manual operation mode. Therefore, in the manual driving mode, the side portions 16B and 16C of the headrest 16 do not interfere with the driver's driving.

A headrest 16 is provided separately from the seat back 14 in the seat 10, and side portions 16B and 16C of the headrest 16 are moved in the longitudinal direction of the vehicle. Therefore, with a simple configuration, the side portions 16B and 16C of the headrest 16 can be moved when the seat back 14 is tilted backward.

FIG. 13 shows a vehicle 200 having a seat (vehicle seat) 210 of a comparative example. As shown in FIG. 13 , the seat 210 has a headrest 212 attached to the upper end portion of the seat back 14 . The headrest 212 is not provided with a portion that moves even when the seat back 14 is tilted backward. Further, the vehicle 200 is provided with a curtain airbag 110 on the inner side of the roof side rail 101 in the vehicle width direction and on the back side of the outer end of the roof headlining (not shown) in the vehicle width direction.

In the seat 210, the head H of the occupant P seated on the seat 210 may move out of the protection area of the curtain airbag 110 when the seat back 14 is greatly tilted backward.

On the other hand, in the seat 10 of the present embodiment, when the seat back 14 is tilted backward beyond a predetermined angle (for example, 45°) with respect to the vertical direction in the automatic driving mode, the side portions 16B of the headrest 16, 16C protrudes forward of the vehicle, and the sides of the head H of the occupant P seated on the seat 10 are covered by the side portions 16B and 16C of the headrest 16 . Therefore, as shown in FIG. 6, even if the head H of the occupant P is out of the protection area of the curtain airbag 110 when the seatback 14 is greatly tilted backward, the side portions 16B and 16C prevent side collisions. The head H of the occupant P can be protected from the

[Second embodiment]
Next, a vehicle seat according to a second embodiment will be described with reference to FIG. In addition, about the same component part as 1st Embodiment mentioned above, the same number is attached and the description is abbreviate|omitted.

As shown in FIG. 7 , a vehicle seat (hereinafter referred to as “seat”) 120 has a headrest 122 attached to the upper end of the seatback 14 as a head restraint. The headrest 122 includes a main body portion 16A arranged at an intermediate portion in the vehicle width direction, a side portion 122B arranged outside the main body portion 16A in the vehicle width direction (on the right side in the vehicle width direction when viewed from the rear of the vehicle), and the main body portion 16A. and a side portion 16C disposed on the vehicle width direction inner side (vehicle width direction left side when viewed from the rear of the vehicle).

A hard pad 124 is arranged on the side of the head H of the occupant P inside the side portion 122B on the outer side in the vehicle width direction. The hard pad 124 is made of a resin (foamed resin, etc.) having a hardness higher than that of the pad 38 arranged on the other portion of the headrest 122 . Inside the side portion 122B, the hard pad 124 is arranged on the side of the head H of the occupant P relative to the frame 34, that is, on the front side of the frame 34 in the vehicle longitudinal direction when the side portion 122B is at the normal position D1. there is

In the above-described seat 120, when the seat back 14 is tilted backward beyond a predetermined angle (for example, 45°) with respect to the vertical direction, the side portions 122B and 16C on both sides in the vehicle width direction of the headrest 122 are positioned in front of the vehicle. Move to the projecting position D2. Therefore, when the seatback 14 is tilted backward, the sides of the head H of the occupant P are covered by the side portions 122B containing the hard pads 124 on the outer side of the headrest 122 in the vehicle width direction. head H can be effectively protected.

[Third embodiment]
Next, a vehicle seat according to a third embodiment will be described with reference to FIGS. 8 to 10. FIG. It should be noted that the same components as those of the above-described first and second embodiments are assigned the same numbers and the description thereof will be omitted.

As shown in FIG. 8, in the third embodiment, a driver's seat 130 is provided on the right side of the front seat of the vehicle (driver's seat side), and a passenger's seat 132 is provided on the left side of the front seat of the vehicle (passenger's seat side). and have. The seat control device 134 controls the driver's seat 130 and the passenger's seat 132 by the control unit 62 . The configuration of each member of the driver's seat 130 and passenger's seat 132 is the same as that of the seat 10 (see FIG. 2) of the first embodiment.

9 shows the angle .alpha. The relationship with position is shown. As shown in FIG. 9, in the driver's seat 130, the positions of the side portions 16B and 16C of the headrest 16 with respect to the angle (α) of the seatback 14 with respect to the vertical direction in the manual operation mode and the automatic operation mode are the first embodiment. It is the same as in the case of the sheet 10 (see FIG. 4) of the form.

Unlike the control of the driver's seat 130, the front passenger seat 132 is controlled in the same manner in the manual operation mode and the automatic operation mode. The front passenger seat 132 is in a normal state when the angle α of the seat back 14 with respect to the vertical direction is equal to or less than a predetermined angle (for example, 45°), and the side portions 16B and 16C of the headrest 16 are in the normal position D1 (Fig. 2). In the automatic driving mode, when the angle .alpha. 2).

FIG. 10 is a flow chart showing an example of the flow of control for changing the positions of the side portions 16B and 16C (see FIG. 2) of the headrest 16 of the front passenger seat 132 performed by the control section 62 of the seat control device 134. As shown in FIG.

As shown in FIG. 10, in step S140, the controller 62 determines whether the angle α of the seat back 14 with respect to the vertical direction is greater than a threshold. In this embodiment, the threshold is 45 degrees. When the determination is affirmative, the process proceeds to step S142.

In step S142, the control unit 62 arranges the side portions 16B and 16C of the headrest 16 of the front passenger seat 132 at the projecting position D2 in front of the vehicle. For example, when the side portions 16B and 16C of the headrest 16 of the front passenger seat 132 are at the normal position D1, the control portion 62 moves the side portions 16B and 16C of the headrest 16 to the projecting position D2 in front of the vehicle.

In step S140, when the above determination is negative, the process proceeds to step S144. In step S144, the control unit 62 places the side portions 16B and 16C of the headrest 16 of the front passenger seat 132 at the normal position D1. For example, when the side portions 16B and 16C of the headrest 16 are originally at the normal position D1, the control unit 62 causes the side portions 16B and 16C of the headrest 16 to stand by at the normal position D1. When step S144 is executed, the process returns to step S140.

In step S146, the control unit 62 determines whether or not the angle α of the front passenger seat 132 with respect to the vertical direction of the seat back 14 is equal to or less than a threshold value. The process waits until the determination is affirmative, and proceeds to step S148.

In step S148, the control unit 62 places the side portions 16B and 16C of the headrest 16 of the front passenger seat 132 at the normal position D1. The control unit 62 moves the side portions 16B and 16C of the headrest 16 from the projecting position D2 to the normal position D1.

In step S150, the control unit 62 determines whether or not the operation is stopped. When the determination is affirmative, the series of processing for controlling passenger seat 132 by seat control device 134 is stopped. If the determination is negative, the process returns to step S140.

The driver's seat 130 and passenger's seat 132 described above have the following effects in addition to the effects described in the first embodiment.

In this embodiment, when the seatback 14 is tilted backward in the manual operation mode, the side portions 16B and 16C of the headrest 16 do not protrude forward in the driver's seat 130, and the side portions 16B of the headrest 16 in the passenger seat 132 do not protrude forward. , 16C project forward of the vehicle. That is, when the seatback 14 is tilted backward in the manual operation mode, the side portions 16B and 16C of the front passenger seat 132 are projected forward of the vehicle, so that the head H of the occupant P seated on the front passenger seat 132 is prevented from a side collision. can be effectively protected. Further, the occupant P seated on the front passenger seat 132 who does not participate in driving can take a relaxed position by tilting the seat back 14 backward.

[Fourth embodiment]
Next, a vehicle seat according to a fourth embodiment will be described with reference to FIG. 11 . The same reference numerals are assigned to the same components as those of the first to third embodiments described above, and the description thereof will be omitted.

As shown in FIG. 11 , a vehicle seat (hereinafter referred to as “seat”) 160 has a headrest 162 attached to the upper end of the seatback 14 as a head restraint. The headrest 162 includes a main body portion 16A arranged at an intermediate portion in the vehicle width direction, and a side portion 162B arranged on the outside of the main body portion 16A in the vehicle width direction (on the right side in the vehicle width direction when viewed from the rear of the vehicle). there is The side portion 162B is movable from the normal position D1 to a projecting position D2 on the front side of the vehicle. In this embodiment, a side portion that can protrude toward the vehicle front side is not provided on the vehicle width direction inner side (vehicle width direction left side when viewed from the rear of the vehicle) of the main body portion 16A of the headrest 162 . Further, in the present embodiment, the length of the headrest 162 in the vehicle width direction at the normal position D1 is shorter than the length in the vehicle width direction of the headrest 16 (see FIG. 2) at the normal position D1 of the first embodiment.

In the seat 160, when the seat back 14 is tilted backward beyond a predetermined angle (for example, 45°) with respect to the vertical direction, the side portion 162B on the vehicle width direction outer side of the headrest 162 protrudes toward the vehicle front side, and the occupant P covers the sides of the head H of the Accordingly, when the seat back 14 is greatly tilted backward, the side portion 162B of the headrest 162 on the vehicle width direction outer side can protect the head H of the occupant P from a side collision.

In the present embodiment, instead of the above configuration, the length of the headrest 162 in the vehicle width direction at the normal position D1 extends inward in the vehicle width direction (to the left in the vehicle width direction when viewed from the rear of the vehicle) of the main body portion 16A. You can lengthen it by letting it exist.

[Fifth embodiment]
Next, a vehicle seat according to a fifth embodiment will be described with reference to FIG. 12 . It should be noted that the same components as those of the above-described first to fourth embodiments are assigned the same numbers, and description thereof will be omitted.

As shown in FIG. 12 , a vehicle seat (hereinafter referred to as “seat”) 170 has a headrest 172 attached to the upper end of the seat back 14 as a head restraint. The headrest 172 includes a main body portion 16A arranged at an intermediate portion in the vehicle width direction, a side portion 172B arranged outside the main body portion 16A in the vehicle width direction (on the right side in the vehicle width direction when viewed from the rear of the vehicle), and the main body portion 16A. and a side portion 172C disposed on the vehicle width direction inner side (vehicle width direction left side when viewed from the rear of the vehicle). The length of the side portion 172B in the vehicle width direction is longer than the length of the side portion 172C in the vehicle width direction. A frame 176 having a longitudinal length shorter than that of the frame 34 is provided inside the side portion 172C.

In the seat 170, the side portions 172B and 172C on both sides of the headrest 172 in the vehicle width direction move from the normal position D1 to the vehicle when the seat back 14 is tilted backward beyond a predetermined angle (for example, 45°) with respect to the vertical direction. It moves to the projecting position D2 on the front side and covers the side of the head H of the occupant P. At this time, the vehicle width direction outer side portion 172B of the headrest 172 protrudes forwardly of the vehicle by a larger amount than the vehicle width direction inner side portion 172C of the headrest 172 projects forwardly of the vehicle. Accordingly, in the seat 170, the side portion 172B of the headrest 172 on the outer side in the vehicle width direction can effectively protect the head H of the occupant P from a side collision.

〔supplementary explanation〕
In addition, in the first to fifth embodiments, the configuration of the side portion moving device 30 that projects the side portions of the headrests 16, 122, 162, 172 toward the vehicle front side can be changed. Further, in the first to fifth embodiments, the side portions of the headrests 16, 122, 162, 172 are configured to rotate toward the vehicle front side, but the present invention is not limited to this configuration. By sliding the side portion toward the front side of the vehicle along the longitudinal direction of the vehicle, the side portion may be projected forward of the vehicle. For example, the side portion moving device may be configured to rotate the side portion of the headrest in a direction to protrude forward of the vehicle by an actuator, a driving portion such as a hydraulic cylinder, a link mechanism, or the like. Further, for example, the side portion moving device may be configured to slide the side portion of the headrest in a direction projecting toward the front side of the vehicle by means of an actuator, a driving portion such as a hydraulic cylinder, a link mechanism, a rack and pinion, or the like. In addition, for the front passenger seat, which does not change operation between manual operation mode and automatic operation mode, a push-pull wire is used to connect the side part of the headrest and the seat cushion. The side portion may be protruded forward of the vehicle by pulling the .

Further, in the first to fifth embodiments, the head protection airbag may be, for example, a side airbag that is provided inside the side door and expands and deploys toward the upper side of the vehicle.

Further, in the first to fifth embodiments, it was possible to switch between the manual operation mode and the automatic operation mode, but the present invention is not limited to this configuration. For example, the present invention can also be applied to a vehicle seat that is used in a vehicle that cannot be switched between a manual operation mode and an automatic operation mode and is only operated manually (normally).

Further, in the first to fifth embodiments, the headrests 16, 122, 162, 172 are provided separately from the seatback 14, but the present invention is not limited to this configuration. For example, in a vehicle seat in which a seat back and a head restraint portion (headrest portion) for restraining the head of an occupant are integrally provided, a side portion of the head restraint portion is moved in a direction projecting forward of the vehicle. It's okay.

Although the present invention has been described in detail with respect to particular embodiments, it should be understood that the invention is not limited to such embodiments and that various other embodiments are possible within the scope of the invention. clear to the trader.

10 seats (vehicle seats)
14 seat back 16 headrest (head restraint part)
16B side portion 16C side portion 30 side portion moving device (configuration for projecting side portion)
64 Operation mode switching unit (switching between manual operation mode and automatic operation mode)
100 vehicle 110 curtain airbag (head protection airbag)
120 seats (vehicle seats)
122 headrest (head restraint)
122B side portion 124 hard pad 130 driver's seat (vehicle seat)
132 passenger seat (vehicle seat)
160 seats (vehicle seats)
162 headrest (head restraint)
162B side portion 170 seat (vehicle seat)
172 headrest (head restraint)
172B side portion 172C side portion α angle (angle with respect to the vertical direction)
P Occupant H Head

Claims (7)

A vehicle seat provided in a vehicle equipped with a head protection airbag that protects the head of an occupant and capable of switching between an automatic operation mode and a manual operation mode,
Equipped with a head restraint part that restrains the occupant's head on the upper side of the seat back,
When the vehicle is switched from the manual operation mode to the automatic operation mode, at least the laterally outer side portion of the head restraint portion protrudes forward of the seat to cover the sides of the occupant's head. It is configured so that the occupant's head can be protected by
The seat back can be tilted backward from a standing state,
A vehicle seat configured such that at least a side portion of the head restraint portion on the vehicle width direction outer side protrudes forward of the seat when the seat back is tilted backward beyond a predetermined angle with respect to the vertical direction . 2. The vehicle seat according to claim 1, wherein a side portion on the vehicle width direction outer side of the head restraint portion incorporates a hard pad. 3. The vehicle seat according to claim 1 , wherein the side portion of the head restraint portion does not protrude forward of the seat when the seatback is tilted backward in the manual operation mode. When the seatback is tilted backward in the manual operation mode, the side portion of the head restraint portion does not protrude forward in the driver's seat, and the side portion of the head restraint portion protrudes forward in the passenger seat. 4. The vehicle seat according to any one of claims 1 to 3, wherein the vehicle seat comprises: The vehicle width direction outer side portion of the head restraint portion projects forwardly of the seat by an amount larger than the vehicle width direction inner side portion of the head restraint portion projects forwardly of the seat, or the head portion 5. The vehicle seat according to any one of claims 1 to 4 , wherein only a vehicle width direction outer side portion of the restraining portion protrudes forward of the seat. The vehicle seat according to any one of claims 1 to 5 , wherein the head restraint portion is a headrest provided separately from the seatback. A vehicle seat according to any one of claims 1 to 6 ;
a head protection airbag provided on the rear surface side of the vehicle width direction outer end of the roof headlining and inflating and deploying downward in the vehicle vertical direction in the event of a side collision to protect the occupant's head;
A vehicle that can be switched between an automatic driving mode and a manual driving mode.

Images