JP2008230397A - Seat structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide seat structure of a vehicle capable of protecting a seated occupant in a rear side seat during a frontal collision of the vehicle with simple structure and without narrowing the space inside a vehicle cabin. <P>SOLUTION: The seat structure of the vehicle is equipped with a front seat 2, and a rear seat 3 disposed in the vehicle rear direction of the front seat 2, and is for protecting the seated occupant B in the rear seat 3 during a frontal collision of the vehicle. The front seat 2 and the rear seat 3 are equipped with seat cushions 20, 3a, and seat backs 30, 3b, respectively. A front movement part 30A is structured so that an upper portion of the seat back 30 of the front seat 2 can be displaced toward the front by a contact load when the seated occupant B in the rear seat 3 moves forward by the frontal collision of the vehicle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle seat structure, and more particularly to a vehicle seat structure in which a front seat and a rear seat are installed side by side in a vehicle front-rear direction.

At the time of a frontal collision of the vehicle, an occupant seated on a seat in the vehicle interior receives a force that moves forward due to inertia. In order to protect an occupant moving forward during a front collision, the vehicle is equipped with an airbag, for example, in a steering wheel.
However, such an airbag is prepared for a seated occupant of a front seat such as a driver's seat, but is not generally prepared for a seated occupant of a rear seat that is a rear seat.

  Regarding the protection of the seated occupant of the rear seat at the time of the front collision, Patent Literature 1 proposes an air cushion device that can alleviate the impact caused by the collision between the occupant of the rear seat and the front seat at the time of the front collision. The air cushion device includes an air cushion and an attachment portion for attaching the air cushion to a seat back of a front seat. In this air cushion device, the air cushion is mounted in advance so as to be positioned on the rear side of the seat back and the headrest of the front seat, and when the occupant sitting on the rear seat moves forward during the front collision, Can be received by the air cushion to absorb the impact and protect the rear seat occupant.

JP 2003-200801 A

  However, the air cushion device described in Patent Document 1 is a separate member from the front seat, and attaching this to the front seat has a problem that the cost of the vehicle seat increases. Further, since the air cushion device is attached to the front seat, there is a problem that the front seat increases in weight.

  The present invention has been made to solve the above-described problems, and can protect a seated occupant of a rear seat at the time of a vehicle front collision with a simple configuration without narrowing a vehicle interior space. The object is to provide a sheet structure.

  In order to achieve the above object, the present invention includes a front seat and a rear seat disposed on the rear side of the front seat, and a vehicle for protecting a seated occupant of the rear seat at the time of a vehicle front collision. When the front seat and the rear seat are equipped with a seat cushion and a seat back, and the seat occupant of the rear seat moves forward and comes into contact with the upper part of the seat back of the front seat due to a vehicle front impact It is the forward moving part comprised so that a forward displacement was possible by the contact load of this.

According to the present invention configured as described above, for example, when the seated occupant of the rear seat moves forward and comes into contact with the upper portion of the seat back of the front seat at the time of a front collision, the upper portion of the seat back of the front seat The front moving part provided on the front side receives the contact load of the seated occupant of the rear seat and moves forward. Thereby, the impact acting on the seated occupant of the rear seat is absorbed, and the occupant can be protected.
Further, since the upper part of the seat back of the front seat moves forward, it is not necessary to arrange a large device on the upper part of the seat back, and the structure is simplified, so that the seat back can be reduced in weight. .

  Preferably, in the present invention, the seat back of the front seat includes a seat back frame extending in the vertical direction on both sides in the width direction, and an intermediate portion in the vertical direction of the seat back frame is bent more than other portions. The weak part comprised easily is provided, and the front movement part of a front seat is comprised so that it may move ahead, when the weak part of a seat back bends.

  According to the present invention configured as described above, for example, the fragile portion of the seat back frame is bent by a forward contact load received from a seated occupant of the rear seat at the time of a front collision. Thereby, the upper part of the seat back frame rotates around the weak part as the rotation center, and the front moving part moves to the front side. In this way, by providing the weak portion in the seat back frame, the impact acting on the seated occupant of the rear seat can be absorbed by the seat back with a simple configuration.

  Preferably, in the present invention, the seat back of the front seat includes a seat back frame extending in the vertical direction on both sides in the width direction, and the seat back frame includes a support frame attached to the seat cushion side of the front seat, And a movable frame that is supported by the support frame so as to be pivotable about an intermediate portion in the vertical direction of the seat back frame, and that extends upward from the pivot center to support the front moving portion. The forward moving unit moves forward by the rotation of the moving frame.

  According to the present invention configured as described above, for example, the moving frame of the seat back frame rotates around the intermediate portion in the vertical direction of the seat back frame due to the forward contact load received from the seated occupant of the rear seat at the time of the front collision. Rotates as the center of movement. Thereby, the front moving part supported by the moving frame moves forward, and the impact acting on the seated occupant of the rear seat can be absorbed by the seat back.

  Preferably, in the present invention, a headrest is coupled to the moving frame of the seatback of the front seat, and the seatback of the front seat is below the center of rotation of the moving frame, and the seat occupant of the front seat A front occupant pressure receiving portion is provided that is capable of moving rearward under a rear load from the vicinity of the waist and is connected to the moving frame so as to move the moving frame forward by the rearward movement.

  According to the present invention configured as described above, when the front occupant pressure receiving portion that receives the rear load from the seated occupant of the front seat is displaced rearward at the time of a rear collision, the moving frame connected thereto rotates. Move the forward moving part forward. Accordingly, the rear head of the seated occupant of the front seat and the headrest can be held close to each other, and the neck of the seated occupant of the front seat can be protected. That is, in the present invention, the neck of the seated occupant of the front seat and the head of the seated occupant of the rear seat can be protected by the same configuration.

Preferably, in the present invention, the front occupant pressure receiving portion of the front seat is disposed at a position lower than a knee of a seated occupant of a predetermined body shape of the rear seat.
According to the present invention configured as described above, when the seated occupant of the rear seat presses the upper part of the seat back of the front seat during the front collision, the knee of the seated occupant of the rear seat is for the front occupant of the front seat. It is possible to prevent the pressure receiving portion from being pressed and prevent the forward movement of the front moving portion at the top of the seat back frame.

  Preferably, in the present invention, the rotation center of the moving frame is positioned above the knee height of the seated occupant of the rear seat, and the distance from the rotation center to the seat back upper end of the front seat is: It is set at a position that is longer than the distance from the center of rotation to the contact portion between the seat back and the knee of the seated occupant of a predetermined body shape at the time of front collision.

  According to the present invention configured as described above, when the seated occupant of the rear seat presses the upper part of the seat back of the front seat at the time of the front collision, the knee of the seated occupant of the rear seat pushes the seat back of the front seat. Even if the turning force is applied to the seat back so that the upper part of the seat back moves, the turning force of the seat occupant's knee acting on the seat back causes the front moving part to move rearward, The turning force for moving the front moving part forward can be easily increased by an external force acting on the upper portion of the seat back. Thereby, it is possible to prevent the forward movement of the front moving portion at the upper part of the seat back frame from being blocked by the knee of the seated occupant of the rear seat.

Preferably, in the present invention, a rear occupant pressure receiving portion for absorbing an impact caused by a contact load from a seated occupant of the rear seat extends in the seat width direction at the upper rear of the seat back of the front seat. Is provided.
According to the present invention configured as described above, a contact load from a seated occupant of the rear seat is received by the rear occupant pressure receiving portion, and the forward moving portion at the upper part of the seat back can be reliably moved forward. .

  According to the vehicle seat structure of the present invention, it is possible to protect the seated occupant of the rear seat during a vehicle front collision with a simple configuration without narrowing the interior space of the vehicle.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, a vehicle seat structure according to a first embodiment of the present invention will be described with reference to FIGS.
1 is an overall configuration diagram of a vehicle seat structure, FIG. 2 is a perspective view of a front seat, FIG. 3 is an explanatory view of the operation of the front seat during a front collision, FIG. 4 is a partially enlarged view of FIG. 3, and FIG. It is operation | movement explanatory drawing of the front sheet | seat at the time of a collision.

As shown in FIG. 1, the seat structure 1 of the first embodiment includes a front seat 2 and a rear seat 3 disposed in a vehicle interior. The rear seat 3 as the rear seat is disposed close to the vehicle rear of the front seat 2 as the front seat.
In the present embodiment, a case where occupants A and B are seated on the front seat 2 and the rear seat 3 will be described. Crew A and B are subject to US federal regulatory standards CRF49ch. 5 corresponds to an average occupant among US adult men called AM50.

  The vehicle floor surface 5 is provided with a front floor surface 5a and a rear floor surface 5b continuously behind the front floor surface 5a. The step portion is configured such that the rear floor surface 5b is higher than the front floor surface 5a by a predetermined height. Has been. Further, the front floor surface 5a and the rear floor surface 5b are slightly inclined by an inclination angle θ (> 0) so that the front of the vehicle becomes higher. In FIG. 1, a line L represents a horizontal plane having a predetermined height.

  The front seat 2 is disposed on the front floor surface 5a, and the rear seat 3 is disposed on the rear floor surface 5b. Thereby, as shown in FIG. 1, the height h2 from the horizontal plane L to the seating surface of the rear seat 3 is set larger than the height h1 from the predetermined horizontal plane L to the seating surface of the front seat 2. (H1 <h2). In FIG. 1, the heights h1 and h2 indicate the height from the horizontal plane L to the highest portion of the seating surface.

  In FIG. 1, seat belt devices 10 and 12 are attached to the front seat 2 and the rear seat 3, respectively. The seat belt device 10 includes a webbing 10 a that restrains the occupant A to the front seat 2, a retractor (not shown) that is disposed below the pillar 6 and winds up the webbing 10 a, and a guide 10 b that is attached to the top of the pillar 6. ing. The occupant A is restrained by the front seat 2 when a buckle 10c attached to the webbing 10a is detachably engaged with an anchor 10d disposed on a side portion of the front seat 2.

  The seat belt device 12 includes a webbing 12a that restrains the occupant B to the rear seat 3, and a retractor 12b that is disposed in the side trim 7 and winds the webbing 12a. The occupant B is restrained by the rear seat 3 when a buckle 12c attached to the webbing 12a is detachably engaged with an anchor 12d disposed on a side portion of the rear seat 3.

The front seat 2 includes a seat cushion 20, a seat back 30 attached to the seat cushion 20 so as to be tiltable, and a headrest 50 attached to an upper portion of the seat back 30.
The rear seat 3 includes a seat cushion 3a, a seat back 3b, and a headrest 3c. Since the basic structure of the rear seat 3 is the same as that of the front seat 2, a detailed description thereof is omitted.

As shown in FIGS. 1 and 2, the seat cushion 20 includes a seat cushion frame 21 and a cushion body 25 placed on the seat cushion frame 21.
The seat back 30 includes a seat back frame 31, a cushion body 40 disposed on the vehicle front side of the seat back frame 31, and a pad (rear occupant pressure receiving portion) 41 disposed on the upper portion of the seat back 30. I have.

  The headrest 50 includes a headrest frame 51 having a stay 51a that is substantially U-shaped and extends downward, and a cushion body 52 that covers an upper portion of the headrest frame 51, and the stay 51a is supported by the seat back 30. It is attached to the seat back 30.

  The seat cushion frame 21 is configured such that side frames 22 support left and right sides of a seat pan on which the cushion body 25 is placed, and the side rails 22 are slidably held in the vehicle front-rear direction.

The seat back frame 31 includes a pair of opposing support frames 32 attached to the left and right side frames 22, a substantially inverted U-shaped moving frame 33 attached to the upper part of the support frame 32 and extending upward, and a lumbar. A support 36 and a pressure receiving part (front occupant pressure receiving part) 37 are provided.
The support frame 32 is attached to the side frame 22 so as to be rotatable about the connecting shaft 22a and extends upward. One support frame 32 is connected via the reclining mechanism 23, so that the seat back 30 can be tilted with respect to the seat cushion 20.

  The moving frame 33 includes two side frames 33a extending substantially in parallel downward and a cross frame 33b that connects the upper ends of the side frames 33a in a substantially horizontal direction. The stay 51a of the headrest 50 is attached to the stay attachment portion of the cross frame 33b so as to be vertically movable.

The two side frames 33a are pivotally attached to the upper portions of the left and right support frames 32, respectively. Specifically, the side frame 33a is rotatable about a rotation shaft 34 provided in the support frame 32 and extending in the width direction. Thereby, the moving frame 33 can be rotated with respect to the support frame 32 in the vehicle longitudinal direction within a predetermined rotation angle range. The two side frames 33a extend inside the left and right support frames 32 to the vicinity of the connection shaft 22a below the rotation shaft 34 along the support frame 32.
In the present embodiment, the upper part of the seat back 30 above the pivot shaft 34 is the front moving unit 30A, and the front moving unit 30A is configured so that the moving frame 33 rotates counterclockwise in FIG. It is possible to move forward (forward displacement) while being supported by the moving frame 33.

  As shown in FIG. 1, the rotation shaft 34 has a distance D1 from the rotation shaft 34 to the upper end portion of the seat back 30, that is, near the cross frame 33 b, so that the seat back 30 (side frame 33 a ) Is set to a height that is longer than the distance D2 to the position C corresponding to the height of the occupant B's knee (D1> D2). In order to set in this way, at least one of the height of the rotating shaft 34 or the height of the seating surface of the rear seat 3 may be adjusted. The position C corresponding to the height of the knee of the occupant B corresponds to a contact portion between the knee of the occupant B and the seat back 30 when the occupant B moves forward at the time of the front collision.

  In this embodiment, the occupant B of the rear seat 3 is attached to the US federal regulation standard CRF49ch. The position C is defined on the basis of this occupant B. However, the present invention is not limited to this, and the occupant B has a predetermined body shape. The position C may be defined. That is, an occupant having a predetermined physique is preferably a US federal regulatory standard CRF49ch. 5 is an occupant having a body size larger than AF05 (an occupant having an average body shape of an occupant that accounts for 5% from the smallest US adult female).

  The lower end of the side frame 33a is connected to the support frame 32 by a spring 35 as a damper means or an urging means. The spring 35 applies an urging force to return the moving frame 33 to the original fixed position when the moving frame 33 rotates due to an impact load applied to the front of the vehicle on the upper part of the moving frame 33. That is, when the moving frame 33 rotates, the spring 35 generates a resistance force in a direction that prevents the rotation and absorbs an impact. The damper means or urging means is not limited to a spring, and may be an elastic body such as a rubber material, or may be a pneumatic or hydraulic damper mechanism.

  The lumbar support 36 is a hard synthetic resin or metal plate-like member formed in a predetermined shape so as to support the vicinity of the waist of the occupant A from the back. The lumbar support 36 is held between the two side frames 33a by a wire spring 36a spanned between the two side frames 33a. The lumbar support 36 is disposed so as to be offset so that the upper end thereof is below the position C. Thus, the lumbar support 36 is not pushed forward by the occupant B's knee, and the side frame 33a is prevented from rotating clockwise.

  Further, in the present embodiment, the lumbar support 36 is formed so as to mainly support the lumbar vertebra of the occupant A, but is not limited thereto, and is formed in a vertically long shape so as to support the sacral vertebra, the lumbar vertebra and the thoracic vertebra. Also good. In this case, even if the knee of the occupant B comes into contact with the lumbar support 36 from behind, the lumbar support 36 is made of a softer material so as not to generate a rotational force that rotates the seat back 30 in the clockwise direction. May be formed.

The pressure receiving portion 37 is harder than the lumbar support 36 and is formed of a hard synthetic resin having a predetermined rigidity. The pressure receiving portion 37 is a plate-like member or a planar member extending in the width direction, and left and right end portions are fixed to the lower end portions of the two side frames 33a. The pressure receiving portion 37 is offset below the lumbar support 36 and is disposed on the back surface of the sacral spine of the occupant A. Therefore, the pressure receiving portion 37 is disposed such that the upper end thereof is positioned below the position C and the seating surface of the rear seat 3.
The pressure receiving portion 37 is preferably formed of a hard member such as a hard synthetic resin or a metal plate.

The pad 41 is attached to the upper rear surface of the cross frame 33b of the moving frame 33, and is a member (shock absorbing pad) that receives and absorbs the shock applied to the seat back 30 by the occupant B who has moved forward during a frontal collision of the vehicle. ). The pad 41 is a hollow synthetic resin member that is configured by an impact support surface extending in the vehicle width direction and a rib or the like that supports the impact support surface.
In addition, in this embodiment, although the pad 41 is attached to the cross frame 33b, it is not restricted to this, You may be embed | buried in the cushion body 40 and may be attached to the cushion body 40 outer surface.

Next, the operation (operation) of the vehicle seat structure according to the first embodiment will be described with reference to FIGS.
First, the operation at the time of a front collision including an oblique front collision will be described with reference to FIGS.
As shown in FIGS. 3 and 4, the occupants A and B receive an inertial force in front of the vehicle due to an impact at the time of the front collision. As a result, the occupants A and B move forward while pulling out the webbing 10a and 12a from the retractor.

  At this time, the head of the occupant B draws a trajectory that comes into contact with the upper end of the seat back 30 and touches the upper end of the seat back 30. The forward contact load acting on the seat back 30 due to the collision with the occupant B is absorbed by the pad 41 and rotates the moving frame 33 counterclockwise about the rotation shaft 34 as a rotation center. Thereby, the front moving unit 30A moves forward, the impact between the occupant B and the seat back 30 is absorbed, and the occupant B can be protected.

  In addition, since the urging force in the opposite direction to the counterclockwise rotation is applied to the moving frame 33 by the spring 35, the forward moving portion 30A does not instantaneously move forward. For this reason, since the forward moving part 30A gradually moves forward over a certain period of time, the impact acting on the occupant B can be absorbed more.

Further, even if the occupant B moves forward and the knee of the occupant B comes into contact with the seat back 30 at the time of the front collision, the front seat 2 moves from the portion where the head of the occupant B comes into contact to the rotating shaft 34. The distance D1 that is the action length is configured to be larger than the distance D2 that is the action length from the portion (position C) where the knee of the occupant B abuts to the rotation shaft 34.
In addition, in the seat structure 1 of the present embodiment, the lumbar support 36 and the pressure receiving portion 37 are disposed below the knee of the occupant B, so that the lumbar support 36 and the pressure receiving portion 37 face forward from the knee of the occupant B. The load does not act.

  As a result, the turning force acting counterclockwise on the moving frame 33 as a whole is larger than the turning force acting clockwise, and the moving frame 33 can be rotated counterclockwise. Thus, the front seat 2 is configured to restrict the movement of the legs of the occupant B and protect the head with priority.

Next, the operation at the time of rear collision will be described with reference to FIG.
As shown in FIG. 5, in the front seat 2, when the occupant A moves rearward due to an impact at the time of a rear collision, the lumbar portion of the occupant A applies a backward load to the pressure receiving portion 37 via the cushion body 40. Due to this rear load, the moving frame 33 rotates counterclockwise about the rotation shaft 34 as a rotation center. As the moving frame 33 rotates, the headrest 50 attached to the upper part of the moving frame 33 moves forward, and the headrest 50 and the rear head of the occupant A are held close to each other.
Thereby, it is possible to prevent the head of the occupant A from colliding with the headrest 50 with a large impact, and the neck of the occupant A can be prevented from becoming whiplash.

  Even when the knee of the occupant B of the rear seat 3 is in contact with the seat back 30 when the moving frame 33 is rotated in the counterclockwise direction, the contact portion (position C between the knee and the seat back 30 as described above). ), The pressure receiving portion 37 is farther from the rotation shaft 34, so that the rotation of the moving frame 33 is not prevented. In order to do this, the height of the front end M (the front end portion of the seating surface) of the seat cushion 20 of the rear seat 3 may be higher than the pressure receiving portion 37 (and the lumbar support 36) ( (See FIG. 3).

  In the above-described embodiment, the forward movement unit 30 </ b> A is pivoted about the pivot shaft 34 as a pivot center, but is not limited thereto. It may be configured to move forward by sliding 30A forward.

Next, a vehicle seat structure according to a second embodiment of the present invention will be described with reference to FIGS. In the following embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
As shown in FIG. 6, in the present embodiment, the seat back 30 of the front seat 2 includes a substantially inverted U-shaped seat back frame 131 whose ends are attached to the left and right side frames 22, and the seat back frame 131. The cushion body 40 attached to the is provided.

  The seat back frame 131 has a notch 131a at an intermediate portion in the vertical direction (height direction). The portion where the notch 131a is formed is more fragile and more easily bent than other portions of the seat back frame 131 with respect to an external load applied to the seat back 30 due to the formation of the notch 131a. This constitutes a weakened part with reduced rigidity. In the present embodiment, the upper part of the seat back 30 than the notch 131a constitutes the front moving part 30A.

In the present embodiment, when the upper portion of the seat back frame 131 rotates in the clockwise direction rather than the deformation limit load when it rotates counterclockwise around the notch 131a (forward movement) ( The deformation limit load (backward movement) is set larger.
In the present embodiment, the notch 131a is formed in order to form the fragile portion, but the present invention is not limited to this. For example, the seat back frame 131 may be divided in the vertical direction at an intermediate portion so that the connection portion between the upper portion and the lower portion can be easily bent.

The operation (operation) of the vehicle seat structure according to the second embodiment will be described with reference to FIG.
When the head of the occupant B comes into contact with the upper part of the seat back 30 at the time of a front collision, the impact concentrates on the fragile notch 131a, so the seat back frame 131 bends at the notch 131a. As a result of this bending, the seat back frame 131 pivots counterclockwise at the top of the notch 131a with the notch 131a as the pivot center. Thereby, the front moving part 30A moves forward, the impact received from the occupant B is absorbed, and the occupant B can be protected.

  Further, as described above, the deformation limit load of the seat back frame 131 is set larger when moving backward than when moving forward, so that the seated occupant A of the front seat 2 moves forward during a front collision. Then, even if the occupant A comes into contact with the seat back 30 after moving backward, the forward moving portion 30A is difficult to move backward. Thereby, the restraint property to the seat back 30 of the passenger | crew A is improved.

Next, a vehicle seat structure according to a third embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 8 and 9, in this embodiment, the seat back frame 231 constituting the seat back 30 of the front seat 2 includes a support frame 32 attached to the left and right side frames 22, and a support frame 32. A substantially inverted U-shaped moving frame 233 having a lower end portion rotatably connected to the upper end portion by a rotation shaft 34 is provided. In the present embodiment, the upper part of the seat back 30 than the rotation shaft 34 constitutes the forward moving part 30A.

In the present embodiment, the upper end portion of the pressure receiving portion support frame 233A is connected to the moving frame 233 in the vicinity of the lower end portion, that is, in the vicinity of the connection portion with the left and right support frames 32, respectively. The pressure receiving portion support frame 233A extends downward substantially parallel to the longitudinal direction (vertical direction) of the moving frame 233. And the pressure receiving part 237 which is a plate-shaped member is being fixed so that it may span over the lower end part of 233 A of right and left pressure receiving part support frames.
Note that the pressure receiving portion support frame 233A is configured such that an urging force that resists rotation is applied to the support frame 32 by damper means or urging means (not shown), as in the first embodiment. .

  In this embodiment, the pressure receiving portion 237 and the moving frame 233 are connected by a pressure receiving portion support frame 233A that is a simple link mechanism, and the moving frame 233 rotates the rotation shaft 34 on the support frame 32. Although it is pivotally attached as the center, it is not limited to this, and the moving frame 233 may be configured to move forward by the backward movement of the pressure receiving portion 237. For example, the pressure receiving unit 237 and the moving frame 233 may be connected by a link mechanism including a plurality of link members, and the moving frame 233 may be moved forward by a load acting on the pressure receiving unit 237.

The operation (operation) of the vehicle seat structure according to the third embodiment will be described with reference to FIG.
When the head of the occupant B comes into contact with the upper portion of the seat back 30 at the time of the front collision, the moving frame 233 rotates counterclockwise around the rotation shaft 34 as a rotation center due to the impact. Thereby, the front moving part 30A moves forward, and the shock received from the occupant B can be absorbed to protect the occupant B.

  Similarly to the first embodiment, since the pressure receiving portion 237 is connected to the moving frame 233 via the pressure receiving portion support frame 233A, the neck of the occupant seated on the front seat 2 is protected at the time of a rear collision. Is possible.

1 is an overall configuration diagram of a vehicle seat structure according to a first embodiment of the present invention. It is a perspective view of the front side sheet | seat of FIG. It is operation | movement explanatory drawing at the time of the front collision of the vehicle seat structure in 1st Embodiment of this invention. FIG. 4 is a partially enlarged view of FIG. 3. It is operation | movement explanatory drawing at the time of the rear collision of the vehicle seat structure in 1st Embodiment of this invention. It is explanatory drawing of the front seat of the vehicle seat structure in 2nd Embodiment of this invention. It is operation | movement explanatory drawing at the time of the front collision of the vehicle seat structure in 2nd Embodiment of this invention. It is explanatory drawing of the front seat of the vehicle seat structure in 3rd Embodiment of this invention. It is operation | movement explanatory drawing of the front seat of the vehicle seat structure in 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat structure 2 Front seat 3 Rear seat 5 Vehicle floor surface 6 Pillar 7 Side trim 10, 12 Seat belt device 20 Seat cushion 21 Seat cushion frame 22 Side frame 30 Seat back 30A Front moving part 31 Seat back frame 32 Support frame 33 Moving frame 33a Side frame 33b Cross frame 34 Rotating shaft 35 Spring 36 Lumber support 37 Pressure receiving part (front occupant pressure receiving part)
41 Pad (pressure-receiving part for the rear passenger)
50 Headrest 131 Seat back frame 231 Seat back frame 233 Moving frame 237 Pressure receiving portion (front occupant pressure receiving portion)

Claims (7)

A vehicle seat structure for protecting a seated occupant of the rear seat at the time of a vehicle front collision, comprising a front seat and a rear seat arranged behind the front seat in the vehicle,
The front seat and the rear seat include a seat cushion and a seat back,
The upper part of the seat back of the front seat is a forward moving part configured to be able to be displaced forward by a contact load when a seated occupant of the rear seat moves forward and contacts due to a vehicle front collision. Vehicle seat structure. The seat back of the front seat includes a seat back frame extending in the vertical direction on both sides in the width direction,
In the middle part of the seat back frame in the vertical direction, a weakened part configured to bend more easily than other parts is provided,
2. The vehicle seat structure according to claim 1, wherein the front moving portion of the front seat is configured to be displaced forward when a weak portion of the seat back is bent. The seat back of the front seat includes a seat back frame extending in the vertical direction on both sides in the width direction,
The seat back frame is rotatably supported by the support frame with a support frame attached to the seat cushion side of the front seat, and an intermediate portion in the vertical direction of the seat back frame as a rotation center. A moving frame that extends above the center of rotation and supports the front moving part,
The vehicle seat structure according to claim 1, wherein the front moving portion of the front seat moves forward by the rotation of the moving frame. A headrest is connected to the moving frame of the seat back of the front seat,
The seat back of the front seat can be moved backward by receiving a rear load from the vicinity of the waist of the seated occupant of the front seat below the rotation center of the moving frame, and the movement by the rear movement. 4. The vehicle seat structure according to claim 3, further comprising a front occupant pressure receiving portion coupled to the moving frame so as to move the frame forward.   5. The vehicle seat structure according to claim 4, wherein the front occupant pressure receiving portion of the front seat is disposed at a position lower than a knee of a seated occupant of a predetermined shape of the rear seat.   The pivot center of the moving frame is positioned above the knee height of the seated occupant of the rear seat, and the distance from the pivot center to the seat back upper end of the front seat is from the pivot center. 4. The vehicle according to claim 3, wherein the vehicle is set at a position that is longer than a distance from a contact portion between a knee of a seated occupant of a predetermined body shape of the rear seat and the seat back at the time of a front collision. Sheet structure.   A rear occupant pressure receiving portion for absorbing an impact caused by a contact load from a seated occupant of the rear seat is provided at the upper rear of the seat back of the front seat so as to extend in the seat width direction. The vehicle seat structure according to claim 2, wherein the vehicle seat structure is a vehicle seat structure.

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