JP2008207765A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat capable of restricting a variation in the action of an occupant caused by an external force in the vertical direction applied on the vehicular seat at the time of a side collision or overturn and improving occupant protection characteristic. <P>SOLUTION: This seat cushion 10 has a seat 11, a base 16 fixed to a vehicle floor 2 and a lift mechanism 20 for supporting the seat 11 in such a way that the seat 11 can be moved in an upward or downward direction with respect to the base 16 and for holding the seat 11 at a predetermined height by a predetermined supporting force. A seat belt device 60 has pretensioners 67, 72 each tracting a webbing 61 so as to improve an occupant restricting force by the webbing 61. The webbing 61 has one end held at a retractor 70 in such a way that it can be wound up there in a state of restraining occupants A, B and the other end is connected to either the base 16 or a vehicle body. The seat belt device 60 is constituted to cause the pretensioners 67, 72 to be operated at the time of the discrimination of a side collision or an overturn. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle seat, and particularly to a vehicle seat provided with a seat belt device.

  Conventionally, a vehicle seat including a seat cushion, a seat back that stands up with respect to the seat cushion, and a seat belt device is in a state in which an occupant seated on the seat cushion is restrained by the webbing of the seat belt device during traveling. It is comprised so that it can hold | maintain.

  In addition, a seat cushion for a vehicle seat includes a seat portion having a seating surface, a lift mechanism portion that supports the seat portion so as to be movable up and down, and a base portion to which the lift mechanism portion is attached. Are known. In the vehicle seat having such a configuration, the seat can be moved up and down in accordance with the occupant's physique by operating the lift mechanism.

However, in a vehicle seat equipped with the above-described seat belt device, if a large external force is applied to the vehicle seat during a side collision or rollover, even if the occupant wears the webbing of the seat belt device, There was a risk that the occupant's behavior changed greatly and the occupant was shocked.
In addition, when the vehicle seat has a lift mechanism, the lift mechanism expands and contracts due to a large external force in the vertical direction during a side collision or rollover, and the seat is displaced upward or downward with respect to the base. Then, there existed a problem that a passenger | crew's behavior change will become larger.

  The present invention has been made to solve such a problem, and suppresses a change in the behavior of the occupant caused by an external force in the vertical direction acting on the vehicle seat at the time of vehicle side collision or rollover. It aims at providing the vehicle seat which can improve protection nature.

  In order to achieve the above object, the present invention provides a vehicle seat including a seat cushion, a seat back that stands up with respect to the seat cushion, and a seat belt device that restrains a seated occupant by webbing. The seat cushion includes a seat portion on which an occupant sits, a base portion fixed to the vehicle floor, and a lift mechanism portion that supports the seat portion so as to be movable in the vertical direction with respect to the base portion and holds the seat portion with a predetermined support force. The seat belt device includes a pretensioner that pulls the webbing so as to increase the restraining force of the occupant by the webbing. The other end side is connected to the base or the fixed part on the vehicle body side, and the seat belt device operates the pretensioner at the time of side collision or rollover judgment. It is characterized by being composed.

  According to the present invention configured as described above, when the pretensioner is operated at the time of a side collision or rollover, the base portion or the occupant is integrally formed by the webbing connected to the base portion or the fixed portion on the vehicle side. It can be pressed against the car body. As a result, even if a load exceeding the support capacity is applied to the lift mechanism due to an impact at the time of a side collision or rollover, and the seat is about to move upward or downward, The downward displacement is restricted. Therefore, according to the vehicle seat of the present invention, the behavior change of the occupant and the seat portion is reduced at the time of a side collision and a rollover, and an excessive load is not concentrated locally on the occupant, and the protection performance is improved. Improvements can be made.

  In the present invention, it is preferable that the lift mechanism portion has support portions for supporting both sides of the seat portion in the vehicle width direction, and the seat portion is held by the support portion on the vehicle outer side of the support portions with a support force. A support mechanism is provided. According to the present invention configured as described above, it is possible to suppress the displacement of the vehicle outer side first by the support mechanism portion at the time of side collision and rollover.

  In the present invention, it is preferable to further include an upper displacement suppression mechanism that suppresses a sudden upward displacement of the seat during a side collision or rollover. According to the present invention configured as described above, in addition to suppressing a sudden upward displacement of the seat portion due to a collision load at the time of a side collision or rollover by pulling the webbing by the pretensioner, the upward displacement suppression mechanism portion Also, the rapid upward displacement of the seat can be suppressed. Thereby, the sudden upward displacement of a seat part can be controlled more certainly, and a passenger's behavior change can be controlled.

  In the present invention, it is preferable to further include a downward displacement suppressing mechanism portion that suppresses a sudden downward displacement of the seat portion at the time of a side collision. According to the present invention configured as described above, the downward displacement restraining mechanism portion can suppress the sudden downward displacement of the seat portion due to the collision load at the time of a side collision and the downward load due to the pulling of the webbing by the pretensioner. Thereby, the sudden downward displacement of a seat part can be controlled and a crew member's behavior change can be controlled.

  In the present invention, it is preferable to further include an upper displacement suppression mechanism portion that suppresses a sudden upward displacement of the seat portion at the time of a side collision or rollover. It is provided in a support part different from the support part provided with the mechanism part. According to the present invention configured as described above, the rapid upward displacement of the seat portion can be suppressed by the pretensioner, the upward displacement suppression mechanism portion, and the support mechanism portion. Furthermore, since the support mechanism part and the upward displacement suppression mechanism part are provided on both sides in the width direction of the seat part, the upward displacement of the seat part is more reliably suppressed.

  In addition, in the present invention, it is preferable to further include a downward displacement suppression mechanism portion that suppresses a sudden downward displacement of the seat portion at the time of a side collision, and the downward displacement suppression mechanism portion includes a support mechanism portion among the support portions. It is provided in a support part different from the provided support part. According to this invention comprised in this way, the rapid downward displacement of a seat part can be suppressed by the downward displacement suppression mechanism part and a support mechanism part. Furthermore, since the support mechanism part and the downward displacement suppression mechanism part are provided on both sides in the width direction of the seat part, the downward displacement of the seat part is more reliably suppressed.

  Preferably, in the present invention, the seat back is provided with a drawer support portion that slidably supports the webbing in the vicinity of the upper end portion thereof, and the webbing extends from the retractor to the drawer support portion in a restrained state. It arrange | positions so that direction may be changed below by this drawer | drawing-out support part. According to the present invention configured as described above, the vehicle seat can be a seat belt-in type.

  In the present invention, preferably, the webbing is configured to hold the vicinity of the waist of the occupant while restraining the occupant. According to the present invention configured as described above, the webbing is pulled by the pretensioner to stably hold the occupant's waist with respect to the seat, and the occupant and the seat are reliably pressed to the base or the vehicle body side. be able to.

  According to the vehicle seat of the present invention, it is possible to improve the occupant protection by suppressing the change in the behavior of the occupant caused by the external force in the vertical direction acting on the vehicle seat at the time of vehicle side collision or rollover.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the vehicle seat according to the first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view of a vehicle seat S for a driver's seat located on the left side of the front seat of the vehicle 1, and FIG. 2 is a side view of the vehicle seat S viewed from the outside of the vehicle. The vehicle seat S is fixed to the vehicle floor 2 adjacent to the pillar 3, and has a seat cushion 10, a seat back 50 erected with respect to the seat cushion 10, a seat belt device 60, and a side airbag device 80. And.

  There are various physiques of the occupants seated on the vehicle seat S. Here, the case of the occupant A and the occupant B will be described as representative examples. Crew A is a federal regulatory standard of CRF49ch. 5 corresponds to an average occupant among US adult men called AM50, while occupant B is the average of the smallest to 5% of US adult women referred to as AF05 in this US standard It corresponds to a typical occupant.

The seat cushion 10 includes a seat portion 11 having a seating surface on which the passengers A and B are seated, a base portion 16 fixed to the vehicle floor 2, and a lift that supports the seat portion 11 so as to be movable in the vertical direction with respect to the base portion 16. The mechanism part 20 is provided.
The base portion 16 includes a pair of seat rails 17a and 17b disposed substantially parallel to the vehicle longitudinal direction, and sliders 18a and 18b that are slidably held in the longitudinal direction on the seat rails 17a and 17b. The seat rails 17a and 17b are fixed to the vehicle floor 2 by brackets 17c.

The pair of sliders 18a and 18b are connected by a thin plate-like support plate 19, move integrally with the seat rails 17a and 17b, and are fixed at a desired position by a lock mechanism (not shown). Yes.
Further, the sliders 18a and 18b are provided with attachment portions 18c and 18d for connecting to the lift mechanism portion 20 so as to protrude upward at two locations separated in the vehicle longitudinal direction. The mounting portion 18c is located in front of the mounting portion 18d in the vehicle.

The seat portion 11 includes a cushion body 12 configured by covering a cushion material with a skin, and a pair of left and right side frames 13 and 14 that support both left and right side portions of the cushion body 12.
The side frame 13 on the vehicle outer side and the side frame 14 on the vehicle center side are connected by a cross bar (not shown) that extends substantially parallel to the vehicle longitudinal direction and extends in the vehicle width direction. The side frames 13 and 14 are connected to sliders 18a and 18b via support portions 20A and 20B of the lift mechanism portion 20, respectively.

The seat back 50 is configured by a cushion body 52 configured by covering a cushion material with an outer skin, a substantially inverted U-shaped seat back frame 53 that supports the cushion body 52, and the like.
Both ends extending below the seat back frame 53 are rotatably connected to a hinge shaft 15 extending in the vehicle width direction connecting the rear portions of the side frames 13 and 14 via a reclining mechanism (not shown). Accordingly, the seat back 50 can be rotated with respect to the seat cushion 10 and held at a predetermined angle.

  The lift mechanism unit 20 will be described with reference to FIGS. 3 is a side view of the lift mechanism portion 20 provided on the side frame 13 outside the vehicle, and FIG. 5 is a side view of the lift mechanism portion 20 provided on the side frame 14 on the vehicle center side. 3 is a view as seen from the center side of the vehicle, and FIG. 5 is a view as seen from the outside of the vehicle. 4 is an exploded perspective view of the brake mechanism, FIG. 6 is a cross-sectional view taken along line II in FIG. 5, and FIG. 7 is a cross-sectional view taken along line II-II in FIG.

  The lift mechanism portion 20 includes support portions 20A and 20B that support both sides of the seat portion 11 in the vehicle width direction. Each of the support portions 20 </ b> A and 20 </ b> B includes a front link member 21 and a rear link member 22 that connect the seat portion 11 and the base portion 16. The support portion 20A outside the vehicle is provided with an operation mechanism 24 for adjusting the seat portion 11 to a predetermined height by displacing the front link member 21 and the rear link member 22, and a support portion on the vehicle center side. 20B is provided with an upper and lower displacement suppression mechanism 40 that suppresses upward and downward displacement of the seat portion 11 due to external force.

One end of each of the pair of front link members 21 is rotatably connected to a mounting portion 18c on the front side of the sliders 18a and 18b by a connecting pin 23a extending in the vehicle width direction, and the other end is connected to the front side of the side frames 13 and 14. The connecting pins 23b extending in the width direction are rotatably connected.
Further, one end of each of the pair of rear link members 22 is rotatably connected to a mounting portion 18d on the rear side of the sliders 18a and 18b by a connecting pin 23c extending in the vehicle width direction, and the other end of each of the side frames 13 and 14 is connected. The rear side is rotatably connected by a connecting pin 23d extending in the vehicle width direction.

  The seat portion 11 is configured such that the front link member 21 and the rear link member 22, which are parallel links, swing about the connecting pins 23 a and 23 c as a fulcrum, so that the height from the base portion 16 or the vehicle floor 2 and the front-rear position are displaced. It has become. As can be seen from FIGS. 3 and 5, the front link member 21 and the rear link member 22 are tilted backward until the seat cushion 10 reaches the uppermost position.

As shown in FIG. 3, the operation mechanism 24 for moving the seat cushion 10 up and down is provided on the side frame 13 outside the vehicle.
The operation mechanism 24 includes an intermediate link member 25 having one end (rear end) coupled to the rear link member 22, a sector gear member 26 coupled to the other end (front end) of the intermediate link member 25, and a sector gear member 26. , A rotating shaft 28 attached to the gear 27, a drum-type brake mechanism 30 as a support mechanism that restricts the rotation of the rotating shaft 28, and an operation for rotating the rotating shaft 28. And a lever 29.

The sector gear member 26 is rotatably attached by a shaft 26c near the lower edge of the side frame 13 between the connecting pins 23b and 23d.
The sector gear member 26 has teeth 26a formed on the front outer periphery of the vehicle and an operating end 26b extending upward of the vehicle. The sector gear member 26 is attached with a winding spring 26d. The inner end portion of the winding spring 26d is locked to the shaft 26c, and the outer end portion is locked to the sector gear member 26. The sector gear member 26 is moved in the clockwise direction in FIG. 3 (that is, the front link member 21 and the rear link member 21). The link member 22 is urged to rotate in the direction in which the link member 22 stands.

  The rear link member 22 extends upward beyond the connecting pin 23 d, and the upper end portion of the rear link member 22 and the operating end 26 b of the sector gear member 26 are connected by the intermediate link member 25. The intermediate link member 25 is rotatably connected to the rear link member 22 and the sector gear member 26 via connection pins 25a and 25b, respectively.

  The rotation shaft 28 penetrates the side frame 13 in the vehicle width direction and is supported by the side frame 13 so as to be rotatable. The rotary shaft 28 has a gear 27 attached to the inner end of the vehicle. The teeth 27a of the gear 27 are meshed with the teeth 26a of the sector gear member 26. The rotary shaft 28 is connected to an operation lever 29 via a brake mechanism 30 at a portion protruding from the side frame 13 to the outside of the vehicle.

  The brake mechanism 30 is configured not to restrict the vertical movement of the seat portion 11 by the occupant's operation lever 29, but to restrict the operation mechanism 24 from being actuated by an upward load and a downward load that are not more than a predetermined value applied to the seat portion 11. Has been. That is, the brake mechanism 30 that also functions as an upper and lower displacement suppression mechanism has a predetermined support force for supporting the seat portion 11, and can restrict the seat portion 11 from moving up and down to a predetermined load. It is configured to be able to. Therefore, the brake mechanism 30 can prevent the vehicle outer side from being largely displaced first, particularly at the time of side collision and rollover.

  As shown in FIG. 4, the brake mechanism 30 includes an outer cylinder 31 and an inner cylinder 32, and the flange portion 31 b of the outer cylinder 31 is fixed to the outer surface of the side frame 13 with a rivet or the like. A pair of brake springs 33 </ b> A and 33 </ b> B are interposed between the outer cylinder 31 and the inner cylinder 32. The rotary shaft 28 has an outer end portion 28 a supported by the center hole 31 a of the outer cylinder 31 and an inner end portion 28 b supported by the side frame 13 so as to be rotatable. A pinion 34 is rotatably attached to an intermediate portion of the rotating shaft 28. The inner cylinder 32 is fixed to the rotation shaft 28 in a state where the outer end portion 28 a of the rotation shaft 28 is inserted into the center hole 32 a of the inner cylinder 32.

  The outer brake spring 33A has one end 33a locked with the notch 32c of the inner cylinder 32, the other end 33d locked with the slit 34a of the pinion 34, and the inner brake spring 33B has one end 33c. The other end 33 b is locked to the notch 32 d of the inner cylinder 32 and is locked to the slit 34 a of the pinion 34.

  In the brake mechanism 30, when the rotary shaft 28 is rotated by the operation lever 29, the end portions 33 b and 33 d (or 33 c and 33 a) of the brake springs 33 A and 33 B act in the diameter reducing direction to rotate the inner cylinder 32. It becomes possible. Therefore, in the operation mechanism 24, when the distal end portion of the operation lever 29 is pulled up, the rotating shaft 28 is rotated counterclockwise in FIG. As the gear 27 rotates counterclockwise, the sector gear member 26 rotates clockwise about the shaft 26c. Due to the clockwise rotation of the sector gear member 26, the rear link member 22 rotates clockwise about the connecting pin 23c via the intermediate link member 25. Further, following this, the front link member 21 rotates clockwise around the connecting pin 23a. Thereby, the side frame 13 outside the vehicle moves upward and forward.

Furthermore, in conjunction with the upward and forward movement of the side frame 13 outside the vehicle, the side frame 14 connected to the side frame 13 by the crossbar also moves upward and forward. Thereby, the seat part 11 moves upward and forward.
Further, when the tip of the operation lever 29 is pulled down in FIG. 3, an operation opposite to the above-described operation occurs, and the seat portion 11 is moved rearward and downward.
As described above, the operation mechanism 24 can adjust the height of the seat portion 11 by the operation lever 29 by the occupant, and if the operation of the operation lever 29 is stopped when the seat portion 11 moves to a desired height. The brake mechanism 30 holds the height.

However, when a force for rotating the pinion 34 is applied to the brake mechanism 30 by the upper and lower loads acting on the seat portion 11, the end portions 33c and 33a (or 33d and 33b) of the brake springs 33A and 33B are expanded. It acts in the radial direction and contacts the inner peripheral surface of the outer cylinder 31 to make the rotary shaft 28 non-rotatable. As a result, the brake mechanism 30 can regulate the upward and downward displacement of the seat portion 11 up to a predetermined load.
The brake mechanism 30 only needs to be able to regulate the upward and downward displacement of the seat portion 11 up to a predetermined load, and may employ other known configurations.

  As shown in FIG. 5, the upper and lower displacement suppression mechanisms 40 are provided on the side frame 14 on the vehicle center side. The displacement suppression mechanism 40 includes an intermediate link member 41 in which the upper end portion and one end (rear end) of the rear link member 22 are connected, a gear member 42 connected to the other end (front end) of the intermediate link member 41, and a gear member. And a rotary damper 44 that suppresses the rotation of 42.

One end of the intermediate link member 41 is rotatably connected to the rear link member 22 by a connecting pin 41a extending in the vehicle width direction, and the other end is rotatable to the gear member 42 by a connecting pin 41b extending in the vehicle width direction. It is connected.
The gear member 42 is rotatably connected to the side frame 14 by a shaft 42c extending in the vehicle width direction, and teeth 42a are formed on the outer periphery. The teeth 42 a mesh with the gear member 47 of the rotary damper 44.

As shown in FIGS. 6 and 7, the rotary damper 44 includes a base member 45, a rotor 46 that is rotatably supported by the base member 45, and a gear member 47 that is fixed to the rotor 46. .
The base member 45 includes a disc-shaped support portion 45a, a shaft portion 45b formed to protrude toward the rotor 46 at the center of the support portion 45a, and a shaft portion 45b that surrounds the shaft portion 45b coaxially with the shaft portion 45b. It has a cylindrical peripheral wall portion 45c formed and a mounting portion 45d formed to extend radially outward from the support portion 45a. The base member 45 is fixed to the side frame 14 by inserting a bolt into an attachment hole provided in the attachment portion 45d. In addition, a disc-shaped cap 45e is fitted in a liquid-tight manner at the distal end portion of the peripheral wall portion 45c.

The rotor 46 has four blade portions 46a extending in the radial direction provided at substantially equal angular intervals in the circumferential direction. Further, the rotor 46 is formed such that a concave portion 46b is formed at the center of the bottom surface in the axial direction, and a cylindrical shaft portion 46c protrudes in the axial direction at the center of the top surface.
The rotor 46 is rotatably supported by the shaft 45b, with the shaft 45b inserted into the recess 46b. In this state, in the rotor 46, the blade portion 46a is accommodated in the peripheral wall portion 45c, and a predetermined gap is formed between the tip of the blade portion 46a and the inner peripheral surface of the peripheral wall portion 45c. Further, the shaft portion 46c protrudes outside the vehicle through a hole portion 45f formed in the center of the cap 45e.

  A space surrounded by the support portion 45a, the peripheral wall portion 45c, the cap 45e and the rotor 46 of the base member 45 forms an oil chamber 45g filled with oil 46d having a predetermined viscosity. A gap formed between the tip of the blade portion 46a and the inner peripheral surface of the peripheral wall portion 45c constitutes an orifice 45h.

The gear member 47 is coaxially attached to the shaft portion 46c of the rotor 46, and the gear member 47 and the rotor 46 are rotated together. The gear member 47 has a bottomed cylindrical shape, and a peripheral wall portion 47 b extending in the axial direction from an edge portion of the disc portion 47 a covers the radially outer side of the peripheral wall portion 45 c of the base member 45. Gear teeth 47c that mesh with the teeth 42a of the gear member 42 are formed on the radially outer surface of the peripheral wall portion 47b.
An oil leakage prevention mechanism (not shown) is provided at the sliding portion between the shaft portion 46c and the cap 45e.

  With this configuration, in the rotary damper 44, when an external force is applied to rotate the rotor 46 via the gear member 47, the oil 46d passes through the orifice 45h as the rotor 46 rotates, and the oil chamber 45g. Try to move in. At this time, the rotor 46 receives a braking force proportional to the rotation speed via the blade 46a due to the viscous resistance of the oil 46d, and the rotation is suppressed. That is, since the braking force increases as the angular velocity of the rotor 46 increases due to the external force transmitted from the seat portion 11 side, the rotor 46 is prevented from rotating rapidly.

For example, a downward load may be applied to the seat 11 when the vehicle 1 collides with the vehicle 1, but this load attempts to rotate the rear link member 22 clockwise in FIG. The clockwise rotation of the rear link member 22 moves the intermediate link member 41 rearward of the vehicle, and further attempts to rotate the gear member 42 clockwise.
However, since the gear member 42 is connected to the rotary damper 44, the rotation of the gear member 42 is suppressed by the braking force that restricts the rotation of the rotor 46 as described above. Thereby, the downward rapid displacement of the seat part 11 is suppressed.
In addition, when the vehicle 1 collides or rolls over, an upward load may be applied to the seat portion 11, but the upward and downward displacement suppression mechanism 40 causes the seat portion 11 to suddenly move due to an operation opposite to that when the downward load is applied. The upward displacement is suppressed.

  On the other hand, when the seat 11 is moved up and down by the operation lever 29, the angular velocity of the rotor 46 is small, so the braking force is also small. Therefore, in the case of a vertical movement operation by the operation lever 29, the vertical movement of the seat portion 11 is hardly suppressed.

Next, a seat belt device 60 for restraining the seated passengers A and B to the vehicle seat S will be described with reference to FIGS.
The seat belt device 60 includes a belt-like webbing 61 that restrains the occupants A and B, a retractor 70 that houses one end of the webbing 61 so that the one end side can be extended, and a latching unit that latches a hook member 64 attached to the webbing 61. 66. The other end of the webbing 61 is attached to an anchor 62 fixed to the side portion (slider 18a) of the seat cushion 10 on the vehicle outer side. The anchor 62 is preferably fixed to the base 16 below the lift mechanism 20 and the fixing part of the vehicle floor 2.

The retractor 70 is disposed below the pillar 3 of the vehicle 1 and is covered with the trim cover 4. The retractor 70 is biased so as to wind up the webbing 61.
The retractor 70 has a built-in shoulder pretensioner 72. The shoulder pretensioner 72 pulls the webbing 61 into the retractor 70 so as to increase the restraining force of the occupants A and B by the webbing 61 at the time of a side collision or rollover, and a mechanism for winding the webbing 61 instantaneously. And a locking mechanism (not shown) with a force limiter.

  The webbing 61 is guided along the pillar 3 from the retractor 70 to the guide 63 disposed on the top of the pillar 3 so that the webbing 61 is slidably held by the guide 63 and turned to the vehicle seat S side. Has been placed.

The locking portion 66 includes a lap pretensioner 67 fixed to the support plate 19, a wire 68 pulled by the lap pretensioner 67, and a buckle 69 that is attached to the tip of the wire 68 and detachably engages with the hook member 64. And have. The wire 68 is covered with a cover. Note that the lap pretensioner 67 may be fixed to a predetermined fixing portion including the base portion 16 and the vehicle floor 2 as long as it is structurally lower than the lift mechanism portion 20.
The wire 68 is pulled out to the side of the seat cushion 10 on the vehicle center side, and the buckle 69 is disposed on the side of the seat cushion 10 on the vehicle center side.

  As shown in FIG. 1, in a state where the hook member 64 is engaged with the buckle 69, the webbing 61 extends from the buckle 69 to the guide 63 while crossing the upper bodies of the passengers A and B diagonally and contacting the vicinity of the shoulder portion. The chest and abdomen of the occupants A and B are restrained by the shoulder portion 61a, and the waists of the occupants A and B are restrained by the wrap portion 61b extending from the anchor 62 to the buckle 69 in the vehicle width direction.

The shoulder pretensioner 72 is actuated by an operation signal from a controller 90 to be described later, and pulls the webbing 61 into the retractor 70 so that the restraint force of the chests of the occupants A and B is mainly enhanced by the shoulder portion 61a. A and B are restrained to the seat back 50.
The lap pretensioner 67 is actuated by an operation signal from the controller 90, and by pulling the buckle 69 and the hook member 64 downward through the wire 68 via the wire 68, the lap pretensioner 67 is mainly near the waist of the passengers A and B by the lap portion 61b. The occupants A and B are restrained to the seat cushion 10 and the seat back 50 in a state where the restraining force is increased.

  Since the retracting length of the lap pretensioner 67 is set to be shorter than the retracting length of the shoulder pretensioner 72, the time during which the lap part 61b reaches the maximum tension from the start of operation (1 to 2 ms) is the shoulder part 61a. Is shorter than the time (2 to 3 ms) for reaching the maximum tension from the start of operation. In the present embodiment, the buckle side is pulled as a wrap pretensioner, but instead, the anchor 62 side may be pulled by a pretensioner. In this case, you may install the anchor 62 in the pillar part by the side of a vehicle body, or a vehicle floor.

  Next, the side airbag device 80 will be described with reference to FIGS. 1, 2, 8, and 9. 8 is a cross-sectional view of the seat back 50 in a state where the airbag 81 is inflated and deployed, and FIG. 9 is a side view of the inflated airbag 81 as viewed from the vehicle width direction.

  The side airbag device 80 is inflated and deployed between a side of a vehicle such as a vehicle door and a seated occupant A and B to protect the occupant A and B, and based on an operation signal from the controller 90. An inflator 89 for inflating and deploying the airbag 81 by supplying gas is provided, and the airbag 81 is unitized together with the inflator 89 in a folded state. The airbag 81 is inflated and deployed so as to fulfill the protection mechanism for the passengers A and B in 4 to 10 ms from the start of operation.

  As shown in FIG. 8, the side support portion 52a outside the vehicle of the seat back 50 is formed with a concave portion 54 having a predetermined depth on the side end surface 56 toward the vehicle center side. A bag 81 and an inflator 89 are stored. The opening of the recess 54 is covered with a cover member 55. When the airbag is deployed, the tear line of the cover member 55 is broken by the inflating airbag 81, and the cover member 55 is deployed to the side of the vehicle with the rear end of the vehicle as a hinge. Thereby, the airbag 81 can be deployed toward the vehicle outer side and the front side.

As shown in FIG. 9, the airbag 81 in the deployed state is seen from the side of the chest so as to protect the chest and abdomen of the passengers A and B seated on the seat cushion 10 of the vehicle seat S. A chest and abdominal protection part 82 that expands toward the waist and a waist protection part 83 that expands toward the side of the waist so as to protect the waists of the passengers A and B are provided. The chest and abdominal protection part 82 and the waist protection part 83 are formed by sewing two cloths of the same shape positioned on the inner side and the outer side in the vehicle width direction in the unfolded state with the sewing part 84.
Further, the chest / abdominal protection part 82 and the waist protection part 83 are connected by a connecting part 84a which is a part of the sewing part 84, and are inflated and deployed integrally. Further, a non-expandable portion 84b which is a part of the sewing portion 84 is formed at the rearmost end portion of the connecting portion 84a, and the strength is improved so that the portion does not break.
The chest and abdominal protection part 82 and the waist protection part 83 communicate with each other in the communication area 85 at the upper part thereof, and a gas inflow port 86 formed at a site of the waist protection part 83 located in the vicinity of the communication area 85. A gas outlet (not shown) of the inflator 89 is connected.

As shown in FIG. 2 and FIG. 9, in the chest / abdominal protection part 82, there is an expansion suppressing part in the vicinity of a portion corresponding to the upper arm B <b> 1 of a small occupant (e.g., occupant B corresponding to AF05 described above). A recess 87 is formed. More specifically, the concave portion 87 is formed in the front edge portion 82a of the chest / abdominal protection portion 82 so as to be recessed rearward between the front edge portion upper portion 82b and the front edge portion lower portion 82c when viewed from the vehicle width direction. Further, the recess 87 is formed on the upper half side of the chest / abdominal protection part 82. The thoracoabdominal protection part 82 is formed such that the part where the recess 87 is formed expands thinner in the vehicle width direction than the other parts. For example, the thinly inflated portion can be configured such that the inner surfaces of the opposing fabrics are connected with a predetermined length of thread, whereby the opposing fabrics are not separated by more than a predetermined distance.
In addition, vent holes 82d and 82e are formed in the vicinity of the front edge portion upper portion 82b and in the vicinity of the front edge portion lower portion 82c, respectively.

The waist protection part 83 is connected to the chest / abdominal protection part 82 as described above, and is formed so as to be in contact with the seat surface of the seat cushion 10 of the vehicle seat S when the airbag is deployed. Thereby, the airbag 81 can be deployed stably and the deployment stability can be enhanced.
When the airbag is inflated and deployed, the waist protector 83 abuts against the waist of the occupants A and B from the lateral direction (outward in the vehicle width direction) with the webbing 61 interposed therebetween, and presses the waist toward the center of the vehicle. The waist can be protected.

When the airbag is deployed, the chest and abdominal protection part 82 of the airbag 81 abuts against the chest and abdomen of the occupants A and B from the lateral direction to press the chest and abdomen toward the center of the vehicle. The abdomen can be protected.
In general, in the small occupant B, the upper arm B1 is pressed by the chest-abdominal protection part, and the displacement of the chest is promoted. However, the thoracoabdominal protection part 82 of the present embodiment is formed such that the portion where the recess 87 is formed is inflated thinner in the vehicle width direction than the other portions, and the upper arm portion B1 enters the recess 87. The chest / abdominal protection part 82 prevents the upper arm B1 and the chest from being pushed excessively toward the center of the vehicle, and the upper body is prevented from being twisted. This makes it easier for the occupants A and B to maintain a normal sitting posture when the airbag is inflated and deployed.
In addition, an air bag may be formed so that a portion of the recess 87 that is recessed toward the seat back side in the side view extends upward along the extending direction of the seat back, so that a small passenger can correspond to a medium passenger. Good.

Next, the operation of the vehicle seat according to the first embodiment will be described.
In the seat belt device 60 and the side airbag device 80, the controller 90 controls the shoulder pretensioner 72, the lap pretensioner 67, and the inflator 89 according to detection signals from the side collision sensor 91 and the rollover sensor 92 provided in the vehicle 1. By operating at this timing, the passengers A and B are protected.

FIG. 10 is an electrical block diagram of these devices. As shown in FIG. 10, a side collision sensor 91, a rollover sensor 92, a shoulder pretensioner 72, a lap pretensioner 67, and an inflator 89 are electrically connected to a controller 90 such as an ECU provided in the vehicle 1. .
The side collision sensor 91 is configured to output a detection signal to the controller 90 when a side collision of the vehicle 1 is detected. The rollover sensor 92 is configured to output a detection signal to the controller 90 when the rollover of the vehicle 1 is detected, more specifically, when it is detected that the vehicle 1 is tilted by a predetermined angle or more.

  The processing flow of the controller 90 will be described based on FIG. The controller 90 acquires output signals from the side collision sensor 91 and the rollover sensor 92 every predetermined time (step S1). When acquiring the output signal, the controller 90 determines whether or not the vehicle 1 is in a side collision or rollover state based on the output signal (step S2). Specifically, in step S2, the controller 90 determines whether or not the output signal is a detection signal that has detected a side collision or rollover.

And the controller 90 complete | finishes a process, when not determining with side collision or rollover by step S2 (step S2; No), and when it determines with side collision or rollover (step S2; Yes), step S3 Proceed to
In step S3, the controller 90 outputs an operation signal to the shoulder pretensioner 72, the lap pretensioner 67, and the inflator 89, operates at a predetermined timing, and ends the process.

FIG. 12 is a timing chart of the process in step S3 of FIG. Here, it is determined that a side collision or rollover occurs at time t ₀ . The controller 90 operates the shoulder pretensioner 72, the lap pretensioner 67, and the inflator 89 almost simultaneously with the determination of the side collision or rollover.
The lap pretensioner 67 sets the lap portion 61b to the maximum tension at time t ₁ (after ₁ to 2 ms from time t ₀ ). Shoulder pretensioner 72 is slightly delayed time t ₂ (after 2~3ms from time t ₀₎ from the time t _1, the shoulder portion 61a in the maximum tension. Further, the airbag 81 in the middle of deployment starts to press the occupants A and B at a time t ₃ (after 4 to 10 ms from the time t ₀ ) further after the time t ₂ and exerts a protective function.

  Unlike this embodiment, when the pretensioner functions after the airbag is deployed as in the prior art, the deployed airbag first interferes with the chests of the occupants A and B, and the occupants A and B The upper body is pushed from the outside of the vehicle toward the center of the vehicle, and the upper body is twisted, causing deformation of the chest. For this reason, the chest is displaced from the normal sitting posture. In this state, even if the webbing is pulled by the pretensioner and the restraining force is increased, the deformation of the chest is not appropriately suppressed, so that the occupants A and B cannot be restrained to the normal sitting posture. For this reason, there is a possibility that an impact load is transmitted (excessive load transmission etc. locally) to the chests of the passengers A and B.

  On the other hand, in the vehicle seat S of the present embodiment, before the deployed airbag 81 interferes with the chest and waist of the occupants A and B, that is, before the airbag 81 exerts the occupant protection function, the seat belt device. The 60 shoulder pretensioner 72 and the lap pretensioner 67 complete the operation, and the webbing 61 functions to increase the restraining force of the passengers A and B. In the vehicle seat S, the airbag 81 can function in a state where the occupants A and B are restrained to the seat cushion 10 and the seat back 50 in a normal sitting posture. Thereby, the deformation | transformation of the passenger | crew's A and B chest (skeleton) is suppressed, and transmission of the impact load (local excess load transmission etc.) to a chest can be reduced effectively.

  Further, in the vehicle seat S of the present embodiment, since the airbag 81 is configured to be deployed forward of the vehicle from the side end surface 56 of the seatback 50, the seatback 50 that contacts the passengers A and B when deploying the airbag is used. Deformation is reduced. Thereby, the displacement of the chest posture of the occupants A and B due to the deployment of the airbag is suppressed, and abnormal impact load transmission to the chest of the occupants A and B can be further suppressed.

  Note that the airbag 81 may be arranged in the recess 54 of the seat back 50 in a state of being accommodated in the case. If comprised in this way, a deformation | transformation of the cushion body 52 of the seat back 50 can be suppressed more at the time of airbag deployment. Thereby, it is possible to further suppress abnormal impact load transmission to the chests of the passengers A and B.

  Further, in the vehicle seat S of the present embodiment, as described above, the airbag 81 is formed such that the portion with which the upper arm B1 of the small occupant B abuts is inflated thinner in the vehicle width direction than the other portions. In addition, the upper arm portion B1 is configured to enter the concave portion 87 during expansion. Thereby, even if it is the small passenger | crew B, it will be suppressed that the upper body will be in the state twisted too much by the airbag 81 to expand | deploy, and a passenger | crew's protection will be improved more.

  Further, in the vehicle seat S of the present embodiment, the wrap portion 61b is preliminarily applied with a high restraining tension by the lap pretensioner 67 before the waist protection portion 83 of the airbag 81 abuts against the waist portions of the occupants A and B. Therefore, the lap portion 61b does not interfere with the deployment operation of the waist protection portion 83 of the airbag 81 to be deployed, and can restrain the occupants A and B at a normal restraint position and without sandwiching the airbag 81. it can. Thus, in the vehicle seat S, the occupants A and B can be restrained by the seat back 50 and the seat cushion 10 in a normal sitting posture by the webbing 61 pulled by the lap pretensioner 67.

Further, in the vehicle seat S of the present embodiment, the seat cushion 10 is held at a predetermined height with the seat portion 11 by the lift mechanism portion 20 with a predetermined support force. For this reason, when a large load exceeding the support capacity is applied to the seat portion 11 in the vertical direction due to an impact at the time of a side collision or rollover, the seat portion 11 tends to be displaced in the contact / separation direction with respect to the base portion 16. .
However, the seat cushion 10 is provided with a brake mechanism 30 that suppresses vertical displacement of the seat portion 11 on the side frame 13 outside the vehicle, and an upper and lower displacement suppression mechanism 40 that is provided on the side frame 14 on the vehicle center side. Therefore, rapid upward and downward displacement of the seat portion 11 can be suppressed.

Further, in the vehicle seat S of the present embodiment, the webbing 61 is connected to a lap pretensioner 67 and an anchor 62 fixed to the base portion 16 below the lift mechanism portion 20, and a retractor 70 fixed to the vehicle body. Therefore, when the lap pretensioner 67 and the shoulder pretensioner 72 are operated, the webbing 61 presses the occupants A and B and the seat portion 11 against the base portion 16 side, that is, the vehicle floor 2 side at the time of side collision and rollover. be able to.
Therefore, even when a large upward load is applied to the seat portion 11 at the time of side collision and rollover, the upper displacement of the seat portion 11 can be suppressed by the webbing 61 in addition to the brake mechanism 30 and the displacement suppression mechanism 40.

Further, when the lap pretensioner 67 and the shoulder pretensioner 72 are actuated at the time of a side collision, the seat part 11 is additionally subjected to a downward load by the pulled webbing 61 in addition to a large downward load due to the side collision. The downward displacement of the seat portion 11 is suppressed by the mechanism 30 and the displacement suppression mechanism 40.
As described above, in the vehicle seat S of the present embodiment, even when large upward and downward loads are applied to the seat portion 11, the behavior changes of the occupants A and B and the seat portion 11 are reduced, so that the occupants A and B Therefore, it is possible to suppress the concentration of excessive load locally, and to improve the occupant protection performance.

  In the above embodiment, the operation mechanism 24 including the brake mechanism 30 is provided on the support portion 20A of the side frame 13, and the displacement suppression mechanism 40 is provided on the support portion 20B of the side frame 14. However, the present invention is not limited thereto. The operation mechanism 24 may be provided in the support portion 20B, and the displacement suppression mechanism 40 may be provided in the support portion 20A.

Moreover, in the said embodiment, although the displacement suppression mechanism part 40 was the structure which suppresses rapid upward and downward displacement of the seat part 11 with the rotary damper 44, it is not restricted to this, By the stopper contact | abutted to the seat part 11 The structure which controls the upward and downward displacement of the seat part 11 may be sufficient.
In the above embodiment, the lap pretensioner 67 and the shoulder pretensioner 72 are provided. However, the present invention is not limited thereto, and only one of them may be provided.

Next, a modified example of the process of step S3 by the controller 90 will be described with reference to FIGS.
FIG. 13 shows an example in which the inflator 89 is started to operate before the shoulder pretensioner 72 and the lap pretensioner 67, but after the webbing 61 reaches the maximum tension, the airbag 81 is inflated and deployed to the extent that the protective function is exhibited. Is shown. In this example, the controller 90, the inflator 89 is started operating in time t _0, to start operation to the time t ₄ with a slight delay from t ₀ the shoulder pretensioner 72 times, even more time t ₄ the lap pretensioner 67 It is also operated to start to time t ₅ with a delay.

Although the shoulder pretensioner 72 and the lap pretensioner 67 maximizes tension the webbing 61 to the time t _6, the inflator 89 to inflate the air bag 81 in the maximum volume to the time t ₇ is later than time t _6. Even when configured to operate in this manner, the occupants A and B can be protected by the airbag 81 while the occupants A and B are reliably restrained in the normal posture by the webbing 61.

In the example of FIG. 13, the shoulder pretensioner 72 and the lap pretensioner 67 almost coincide with the time when the webbing 61 is set to the maximum tension, so that the passengers A and B are reliably restrained by the seat back 50 and the seat cushion 10. can do.
In the example of FIG. 13, if the shoulder pretensioner 72 and the lap pretensioner 67 set the webbing 61 to the maximum tension before the airbag 81 exerts the occupant protection function, the lap pretensioner 67 is changed to the shoulder pretensioner 72. The operation may be started earlier.

FIG. 14 shows an example in which the shoulder pretensioner 72 and the lap pretensioner 67 are activated prior to the inflator 89. In this example, the shoulder pretensioner 72 and the lap pretensioner 67 are started to operate at time t ₀ , and the inflator 89 is started to operate at time t ₈ later than time t ₀ . Thus, the lap pretensioner. 67 to the webbing 61 to the maximum tension in the time t _9, the shoulder pretensioner 72 is the webbing 61 to the maximum tension to time t _10, the air in the time t ₁₁ later than the inflator 89 is time t ₁₀ The bag 81 is inflated to the maximum volume. When configured to operate in this manner, the occupants A and B can be protected by the airbag 81 in a state where the occupants A and B are more reliably restrained to the normal sitting posture by the webbing 61.

  Next, a vehicle seat S according to a second embodiment of the present invention will be described with reference to FIGS. 15 is a front view of the vehicle seat S with the airbag 181 deployed, FIG. 16 is a side view of the vehicle seat S viewed from the outside of the vehicle, and FIG. 17 is a seat back 50 with the airbag 181 inflated and deployed. FIG. In the following embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

In the vehicle seat S of the second embodiment, the unitized side airbag device 180 is stored in a state of being embedded in the seat back 50, and air is introduced from the vicinity of the front edge of the side end surface 56 outside the vehicle of the seat back 50. The bag 181 is configured to be deployed outside the seat back 50. The configuration other than the side airbag device 180 is the same as that of the vehicle seat S of the above-described embodiment, and the effects achieved are the same.
The airbag 181 has the same basic structure as the airbag 81 in that it includes a chest / abdominal protection part, a waist protection part, and a recessed part 87, and the recessed part 87 is inflated thinner in the vehicle width direction than other parts. It is formed to do.

As shown in FIG. 17, a recessed portion 150 is formed in the side support portion 52 a of the seat back 50 adjacent to the seat back frame 53 on the outside of the vehicle, and the side airbag device 180 is disposed in the recessed portion 150. ing. The side support portion 52a protrudes forward of the vehicle, and a front end portion, that is, a front edge of the side end face 56 forms a top portion.
The cushion body 52 is formed with a slit 151 extending from the front end of the concave portion 150 to the vicinity of the front end portion of the side support portion 52a. The skin of the side support portion 52a is aligned with the outlet of the slit 151 and A fracture portion 152 is provided in the vicinity of the front edge.

Next, the operation of the vehicle seat according to the second embodiment will be described.
When the inflator 89 is actuated, the airbag 181 in the middle of inflation passes through the slit 151 while expanding the slit 151 in the vehicle width direction, breaks the breakage portion 152, and deploys outside the seat back 50. As described above, the airbag 181 is configured to deploy substantially forward from the front edge of the side end surface 56 of the seat back 50 on the vehicle side. As a result, the airbag 181 is deployed through the region where the waist protection part is close to the waists of the occupants A and B, and is positioned on the outer side in the vehicle width direction of the waist parts of the occupants A and B. By deploying in this way, the degree to which the airbag 181 presses the occupants A and B toward the vehicle center is reduced, and deformation of the upper bodies of the occupants A and B is suppressed.

  Also in the vehicle seat S of the second embodiment, the webbing 61 has the maximum tension for the passengers A and B before the airbag 181 is inflated and deployed to the extent that the passenger protection function is exhibited, as in the first embodiment. Is restrained. Therefore, even when the airbag 181 is deployed through a region close to the waist of the passengers A and B as in the vehicle seat S of the second embodiment, interference between the webbing 61 and the waist protection portion of the airbag 81 is prevented. can do. In the first and second embodiments, the wrap pretensioner 67 is provided, but only the shoulder pretensioner 72 may be used.

Next, a vehicle seat according to a third embodiment of the present invention will be described with reference to FIG. FIG. 18 is a front view of the vehicle seat S with the airbag 81 deployed.
The vehicle seat S of the third embodiment has substantially the same configuration as the vehicle seat S of the first embodiment, but differs in that a so-called seat belt-in type seat belt device 160 is provided. In this vehicle seat S, the retractor 70 is fixed to the support plate 19, and the guide 65 as a drawer support portion penetrates the cushion body 52 from the vicinity of the upper end portion on the vehicle outer side of the seat back frame 53 and protrudes upward. It is attached.

The webbing 61 is guided from the retractor 70 through the inside of the seat back 50 to the guide 65, is slidably supported by the guide 65, and is disposed so as to change direction toward the seat cushion 10.
As described above, in the vehicle seat S, the webbing 61 is divided into the retractor 70 and the lap pretensioner 67 that are structurally attached to the lower support plate 19 than the lift mechanism 20 and the anchor 62 that is attached to the slider 18a. The passengers A and B are routed so as to be restrained via a guide 65 that is connected and attached to the upper portion of the seat back 50.

Next, the operation of the vehicle seat according to the third embodiment will be described.
With the above-described configuration, in the vehicle seat S of the third embodiment, when the lap pretensioner 67 and the shoulder pretensioner 72 are operated and the webbing 61 is pulled, the occupants A and B and the seat portion 11 are moved toward the base portion 16 side. Pressed down.
The webbing 61 pulled by the shoulder pretensioner 72 and the lap pretensioner 67, the brake mechanism 30 and The displacement suppression mechanism 40 suppresses upward and downward displacements of the occupants A and B and the seat portion 11, and can stabilize the behavior of the seat portion 11.

Next, based on FIG. 19, the lift mechanism part 20 which concerns on a modification is demonstrated. FIG. 19 is a side view of the lift mechanism 20 provided on the side frame 14 on the vehicle center side. FIG. 19 is a view as seen from the outside of the vehicle.
The example of FIG. 19 is an example in which the upper and lower displacement suppression mechanism 40 has a shock absorber 144 instead of the rotary damper 44. That is, in the lift mechanism unit 20, the upper and lower displacement suppression mechanisms 40 are connected to the intermediate link member 41, the substantially triangular connection member 142 connected to the front end of the intermediate link member 41, and the connection member 142. A shock absorber 144.

The connecting member 142 is rotatably connected to the side frame 14 by a shaft 142c extending in the vehicle width direction. Further, the front end of the intermediate link member 41 is rotatably connected to the connecting member 142 by a connecting pin 41b extending in the vehicle width direction, and the tip of the piston rod 144b of the shock absorber 144 is rotatable by the connecting pin 144c. It is connected.
The shock absorber 144 includes a cylinder 144a and a piston rod 144b that can move forward and backward with respect to the cylinder 144a. The tip of the cylinder 144a is rotatably connected to the side frame 14 by a connecting pin 144d.

The shock absorber 144 is configured to generate a braking force proportional to the moving speed of the piston rod 144b and to reduce the moving speed of the piston rod 144b when an external force that moves the piston rod 144b back and forth is applied. Yes.
When a load is applied to the seat 11 that is displaced upward or downward with respect to the base 16 during a side collision or rollover, the rear link member 22 will rotate clockwise or counterclockwise depending on the load direction. Accordingly, the intermediate link member 41 tends to move in the vehicle front-rear direction.

  When the intermediate link member 41 moves forward of the vehicle, the connecting member 142 rotates counterclockwise, and when the intermediate link member 41 moves rearward of the vehicle, the connecting member 142 rotates clockwise. The rotation of the connecting member 142 attempts to move the piston rod 144b of the shock absorber 144 forward and backward with respect to the cylinder 144a. At this time, a braking force is applied to the piston rod 144b as described above. Accordingly, the rotation of the rear link member 22 via the connecting member 142 and the intermediate link member 41 is suppressed by this braking force. Thereby, the upward and downward displacement of the seat part 11 can be suppressed.

It is a front view showing a vehicular seat of a 1st embodiment of the present invention. It is a side view of the vehicle seat of FIG. It is a side view of the lift mechanism part of the vehicle seat of FIG. It is a disassembled perspective view of the brake mechanism of the vehicle seat of FIG. It is a side view of the lift mechanism part of the vehicle seat of FIG. It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. It is sectional drawing of the seat back of the state which the airbag of the vehicle seat of FIG. 1 expand | deployed. It is a side view of the airbag which the vehicle seat of FIG. 1 inflated and deployed. It is an electrical block diagram of the vehicle seat of FIG. It is a processing flow of the controller of the vehicle seat of FIG. It is a timing chart of a process of the controller of the vehicle seat of FIG. It is a timing chart of the process of the controller of a modification. It is a timing chart of the process of the controller of a modification. It is a front view which shows the vehicle seat of 2nd Embodiment of this invention. It is a side view of the vehicle seat of FIG. FIG. 16 is a cross-sectional view of the seat back in a state where the airbag of the vehicle seat in FIG. 15 is inflated and deployed. It is a front view of the vehicle seat of 3rd Embodiment of this invention. It is a side view of the lift mechanism part of a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Vehicle floor, 10 ... Seat cushion,
11 ... Seat, 13, 14 ... Side frame, 16 ... Base,
17a, 17b ... seat rail, 18a, 18b ... slider,
19 ... support plate, 20 ... lift mechanism,
21 ... Front link member, 22 ... Rear link member, 24 ... Operation mechanism,
25 ... Intermediate link member, 26 ... Sector gear member, 27 ... Gear,
28 ... Rotating shaft 29 ... Operation lever 30 ... Brake mechanism
40: upper and lower displacement suppression mechanism, 41: intermediate link member,
42 ... gear member, 44 ... rotary damper, 47 ... gear member,
50 ... Seat back, 52 ... Cushion body,
53 ... Seat back frame, 54 ... Recess, 55 ... Cover member,
60, 160 ... seat belt device, 61 ... webbing,
62 ... Anchor, 63 ... Guide, 64 ... Hook member,
66 ... locking part, 67 ... wrap pretensioner, 68 ... wire,
69 ... Buckle, 70 ... Retractor, 72 ... Shoulder pretensioner,
80, 180 ... side airbag device, 81, 181 ... airbag,
89 ... Inflator, 90 ... Controller, 91 ... Side collision sensor,
92 ... Rollover sensor, A, B ... Crew, B1 ... Upper arm, S ... Vehicle seat

Claims (8)

A vehicle seat including a seat cushion, a seat back standing on the seat cushion, and a seat belt device for restraining a seated occupant by webbing,
The seat cushion supports a seat portion on which an occupant sits, a base portion fixed to a vehicle floor, the seat portion movably up and down with respect to the base portion, and holds the seat portion with a predetermined support force. A lift mechanism,
The seat belt device includes a pretensioner that pulls the webbing so as to increase the restraining force of the occupant by the webbing,
In the state where the occupant is restrained, one end of the webbing is held so as to be able to be wound around the retractor, and the other end side is connected to the base part or the fixed part on the vehicle body side,
The seat belt device is configured to operate the pretensioner at the time of side collision or rollover determination.   The lift mechanism portion includes support portions that respectively support both sides of the seat portion in the vehicle width direction, and a support mechanism portion that holds the seat portion with the support force is provided on a support portion outside the vehicle of the support portions. The vehicle seat according to claim 1, wherein the vehicle seat is provided.   The vehicle seat according to claim 1, further comprising an upper displacement suppression mechanism that suppresses a sudden upward displacement of the seat during a side collision or rollover.   The vehicle seat according to any one of claims 1 to 3, further comprising a downward displacement suppression mechanism portion that suppresses a sudden downward displacement of the seat portion in a side collision. Furthermore, it has an upper displacement suppression mechanism that suppresses a sudden upward displacement of the seat during a side collision or rollover,
The vehicle seat according to claim 2, wherein the upper displacement suppression mechanism is provided on a support different from the support provided with the support mechanism in the support. Furthermore, it has a downward displacement suppression mechanism that suppresses a sudden downward displacement of the seat during a side collision,
The vehicular seat according to claim 2, wherein the downward displacement suppression mechanism is provided on a support portion different from the support portion on which the support mechanism portion is provided. The seat back is provided with a drawer support part that slidably supports the webbing in the vicinity of the upper end part thereof,
7. The webbing is disposed so as to extend from the retractor to the drawer support portion while restraining an occupant, and to turn downward at the drawer support portion. The vehicle seat according to claim 1.   The vehicle seat according to any one of claims 1 to 7, wherein the webbing is configured to hold the occupant in a restrained state and hold the vicinity of the occupant's waist.

Images