JP2010116114A - Seat device of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a seat into a reclining state by increasing a backward inclination angle of a seat back 22 while avoiding the interference with an interference object and optimize a seating attitude of an occupant to come in the reclining state in the seat 2 having the interference object (wheel house 13) existing in the backward. <P>SOLUTION: The seat device includes a seat 2 including a seat cushion 21 and a seat back 22 which are independently supported by the member on a vehicle body side to each other, upper side and lower side support parts 3, 4 for supporting the seat back 22, a guide mechanism (guide groove) 413 which moves the seat back 22 so that the seat back 22 shifts from a usual state to a reclining state inclining so that the backward inclining angle is further increased while moving upward while keeping the state supported by the upper and the lower support parts 3, 4 as an operation part (operating lever) 42 is operated, and a holding mechanism (stopper) 44 for holding the seat back 22 in the reclining state. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  This technology relates to a vehicle seat device.

  Unlike a front seat, a seat constituting a rear seat in a vehicle may have an interfering object such as a wheel house or a rear panel behind the seat back. For this reason, the seat in the rear seat may not be in a reclining state that further increases the rearward tilt angle of the seat back from the normal state.

For example, in Patent Document 1, as a seat device for a rear seat, the lower end portion of the seat back is moved forward while moving downward, thereby avoiding interference between the seat back and the rear panel behind the seat back. A configuration for increasing the tilt angle is disclosed.
Japanese Patent Laid-Open No. 8-80771

  However, in the seat device disclosed in this patent document, the lower end of the seat back while moving the seat cushion downward in order to secure a space in which the seat back can be moved downward when shifting to the reclining state. The part is moved downward and forward. For this reason, as the transition from the normal state to the reclining state occurs, the hip point of the occupant seated there moves downward while moving downward, and the knee angle of the occupant becomes steep. As a result, the seat device disclosed in this patent document has a problem that the seating posture of the occupant in the reclining state becomes a cramped posture.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a seat device including a sheet having an interference object behind the seat back while avoiding interference with the interference object. An object is to increase the rearward tilt angle of the back to a reclining state and to optimize the seating posture of the occupant in the reclining state.

  A seat device for a vehicle is provided in the vicinity of a front side of a wheel house that projects inwardly in the vehicle width direction, and a seat cushion that is supported by members on a vehicle body side independently of each other, and A seat including a seat back is provided.

  The seat device further includes an upper support portion for supporting a relatively upper portion of the seat back, a lower support portion for supporting a relatively lower portion, and an operation operated by an occupant. And a normal state in which the seat back stands at a predetermined backward tilt angle while maintaining the state where the seat back is supported by the upper and lower support portions as the operation portion is operated. A guide mechanism for moving the seat back so as to shift to a reclining state in which the inclination angle is further increased while moving upward, and a holding mechanism for holding the seat back in the reclining state. Yes.

  A wheel house is disposed behind the seat including a seat cushion and a seat back that are supported by members on the vehicle body side independently of each other. For this reason, for example, when the seat back is rotated backward about the lower end portion of the seat back and the seat back is inclined backward, the seat back and the wheel house interfere with each other.

  Therefore, in this seat device, when the seat is shifted from the normal state to the reclining state by operating the operation unit, the seat back is tilted so as to further increase the tilt angle while moving the seat back upward. By moving the seat back upward, it is possible to achieve tilting the seat back further backward than in the normal state while avoiding interference between the seat back and the wheel house.

  Further, in the reclining state, the seat back moves upward from the normal state, so that a high position of the occupant's waist seated there is supported, and the comfort of the occupant is improved.

  Further, for example, in a configuration in which the seat back is tilted backward by turning so that the lower end of the seat back moves forward about the upper end of the seat back, the lower end of the seat back is greatly moved forward. The hip point of the occupant who sits there moves greatly forward. As a result, the seating posture of the occupant becomes a tight posture.

  On the other hand, in the above configuration, since the upward movement of the seat back and the backward inclination are combined, the backward inclination angle of the seat back is increased even if the lower end portion of the seat back is moved forward. It becomes possible. As a result, the seating posture of the occupant in the reclining state can be optimized.

  In addition, since the seat back and the seat cushion are supported by the vehicle body members independently of each other, the seat reclining can be realized while the seat support structure is simplified. Further, since the seat back is supported by both the upper support portion and the lower support portion, the seat back can be supported with high support rigidity.

  The lower support portion is configured to support a lower end portion of the seat back, the guide mechanism is provided in the lower support portion, and the seat back shifts from the normal state to the reclining state. In some cases, a guide member that moves the lower end portion of the seat back obliquely upward to the front may be provided.

  By moving the lower end portion of the seat back obliquely upward in front by the guide member, the tilt angle is further increased while the seat back moves upward. Thus, it is possible to shift the seat back from the normal state to the reclining state. At this time, since the lower end portion of the seat back is moved obliquely upward in the front, the amount by which the upper portion of the seat back moves rearward is relatively small. This is advantageous in avoiding interference with the wheel house, and can further ensure a larger rearward tilt angle of the seat back.

  The vehicle seat device further includes a seat back frame that is disposed inside the seat back and to which the upper support portion is fixed, and the guide mechanism includes the seat back in the normal state and the reclining state. It is good also as having the slide permissible part which permits that the above-mentioned upper support part slides relatively with respect to the above-mentioned seat back frame, when changing a state between.

  When the seat back is changed between the normal state and the reclining state, the upper support portion is slid relative to the seat back frame, so that the position of the upper support portion is not changed and the predetermined position is obtained. I will stay. As a result, even when the seat back is in either the normal state or the reclining state, it is possible to realize that the relatively upper portion of the seat back is supported by the vehicle body side member by the upper support portion.

  This means that the configuration of the members on the vehicle body side can be made common in both the present configuration in which the state of the seatback is changed between the normal state and the reclining state, and the configuration in which such a state change is not performed.

  The seat back frame may be curved in a direction in which at least a part thereof bulges forward so that a locus of relative sliding movement of the upper support portion is curved in a side view of the vehicle.

  When the seat back shifts from the normal state to the reclining state, the seat back moves upward and then tilts so that the inclination angle further increases.Therefore, the seat back of the upper support portion corresponds to the movement locus of the seat back. The locus of sliding movement relative to the back frame needs to be curved. Curving at least a portion of the seat back frame allows the seat back to move between the normal state and the reclining state.

  The seat back is further configured to be able to fall on the seat cushion by rotating forward about the lower end thereof, and the upper support portion is configured to be in the normal state and the In the reclining state, the relatively upper portion of the seat back is supported by engaging with the member on the vehicle body side, while the normal state or the reclining state is changed from the reclining state in accordance with the operation of the operation unit. When shifting to, a latch mechanism for releasing the engagement may be included.

  When the upper support portion includes a latch mechanism, the upper support portion is a portion that supports a relatively upper portion of the seat back in the normal state and the reclining state, and the normal state, the reclining state, and the lying down state. It becomes a part for switching between. As described above, since the upper support portion also has two functions, the state of the seat back can be changed between the normal state, the reclining state, and the lying down state with a small number of parts.

  The vehicle seat device may further include a release mechanism that releases the holding mechanism when the seat back is shifted from the reclining state to the lying down state.

  Since the holding mechanism is released when the seat back shifts from the reclining state to the lying down state, the seat back falls down in the normal state, that is, in a state of moving downward from the reclining state. As a result, the upper surface position of the seat back that has been laid down (that is, the back surface of the seat back in a normal state) is a relatively low height position. This is to reduce the level difference between the floor surface of the luggage compartment and the upper surface of the seat back as much as possible or to eliminate the level difference when the cargo compartment provided behind the seat back is expanded by expanding it. It is advantageous.

  The vehicle seat device includes a moving mechanism that moves the seat cushion so that the seat cushion moves from a normal state to a lifted state in which a rear end portion is moved upward at least upward, and the seat back includes the normal state. An interlocking mechanism that interlocks the state change between the state and the reclining state and the state change of the seat cushion between the normal state and the lifting state, Also good.

  When the seat back moves to the reclining state, the rear end of the seat cushion is moved at least upward in conjunction with it, so that the hip point of the occupant seated there moves diagonally forward and knee point Moves diagonally forward and downward. As a result, the hip angle and knee angle of the occupant are enlarged, and the seating posture is further optimized. Further, in the reclining state, the gap between the seat back and the seat cushion is reduced.

  By moving the seat back upward and tilting so that the tilt angle is further increased, the seat back can be tilted further backward than in the normal state while avoiding interference between the seat back and the wheel house. In this case, it is possible to easily realize a reclining state that is difficult to realize.

  In the reclining state, since the seat back moves upward, a high position of the waist of the occupant seated there is supported, and the comfort of the occupant can be improved.

  When the seat back is moved to the reclining state, the upward movement of the seat back and the rearward tilt are combined, so even if the amount by which the lower end of the seatback moves forward is reduced, the rearward tilt angle of the seatback is increased. To be realized. As a result, the seating posture of the occupant can be optimized.

  Since the seat back and the seat cushion are supported by members on the vehicle body side independently of each other, reclining of the seat can be realized while the seat support structure is simplified. This is advantageous in reducing the cost.

  Since the seat back is supported by both the upper support portion and the lower support portion, the seat back can be supported with high support rigidity.

  Hereinafter, embodiments will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 shows an example of a vehicle. In this vehicle 1, the central portion in the front-rear direction in the passenger compartment is a passenger compartment 11, and the passenger seat 11 includes a front seat 111 that is a driver seat and a passenger seat, and a rear seat disposed behind the front seat 111. Seat 2 is provided. The rear of the rear seat 2 is a cargo compartment 12, and in this vehicle 1, the passenger compartment 11 and the cargo compartment 12 are connected to each other in the passenger compartment.

  The luggage compartment 12 is provided with a wheel house 13 that accommodates the rear wheels. The wheel house 13 is disposed so as to project inward in the vehicle width direction, for example, as virtually shown in FIG. The rear seat 2 is located immediately before the wheel house 13.

  As shown in FIG. 2 and the like, the rear seat (hereinafter also simply referred to as the seat 2) includes a seat cushion 21 and a seat back 22, and the seat 2 has at least three passengers in the vehicle width direction. It is configured to be seated side by side. The seat cushion 21 is disposed on the floor panel 14 so as to extend in the vehicle width direction, and is fixed to the floor panel 14. As a result, the seat cushion 21 does not move. In addition, although illustration is abbreviate | omitted inside the seat cushion 21, the seat cushion frame is arrange | positioned.

  Similar to the seat cushion 21, the seat back 22 is disposed extending in the vehicle width direction at a rear position of the seat cushion 21. A seat back frame 23 is disposed inside the seat back 22. A floor mat 26 is attached to the back surface of the seat back 22 so as to connect the floor surface of the luggage compartment 12 and this back surface.

  The seat back 22 is also supported by a member on the vehicle body side independently of the seat cushion 21 by supporting both side portions in the vehicle width direction by the upper support portion 3 and the lower support portion 4, respectively. Although described in detail later, the upper support 3 and the lower support 4 support the seat back 22 so that the state can be changed between the normal state, the reclining state, and the lying down state.

  The lower support portion 4 is a member that supports a relatively lower portion of the seat back 22. As shown in FIG. 3, the lower support portion 4 includes a guide bracket 41, an operation lever 42, a lever bracket 43, and a stopper 44.

  The guide bracket 41 is a bracket for supporting the support shaft 24 provided at the lower end portion of the seat back 22.

  Here, the support shaft 24 is a shaft fixed to the seat back 22 so as to protrude outward in the vehicle width direction from each of the rear end portions on both side surfaces of the seat back 22. Various forms can be adopted for fixing the support shaft 24 and the seat back 22. Although not shown in detail, for example, a bracket that is disposed outside the seat back 22 and is fixed to the seat back frame 23 is separately provided, and the support shaft 24 is fixed to the bracket. (For reference, refer to the bracket 241 in FIGS. 13 and 14). Further, one end of the support shaft 24 may be directly fixed to the seat back frame 23 inside the seat back 22, and the support shaft 24 may be disposed from there through the side surface of the seat back 22.

  The guide bracket 41 is configured to include a fixed portion 411 and a support portion 412 extending from the fixed portion 411 toward the front obliquely upward by bending a plate-like member, for example. As shown in FIG. 2, the fixing portion 411 is fixed to the floor panel 14 at the side position of the seat 2.

  The support portion 412 is disposed at the lower end portion of the side surface of the seat back 22 so as to face the side surface. A long hole 413 is formed in the support portion 412 so as to penetrate the support portion 412 in the plate thickness direction. As shown in FIGS. 10 and 11, the elongated hole 413 is formed in an arc shape that extends substantially in the vertical direction and is curved so as to protrude forward. The long hole 413 is disposed through the support shaft 24 of the seat back 22 and supports the support shaft 24 and thus the lower end portion of the seat back 22, as will be described in detail later. When the state is changed between the reclining state and the reclining state, the support shaft 24 is guided. Hereinafter, this long hole is referred to as a guide groove 413.

  The operation lever 42 is disposed at an intermediate position in the vertical direction on the side of the seat back 22. The operation lever 42 includes a grip portion 421 that the occupant grips, a fulcrum portion 422 that is rotatably supported by the lever bracket 43, and a connecting portion 423 that is disposed on the opposite side of the grip portion 421 across the fulcrum portion 422. And has a shape like a character “7” in a side view as a whole (for example, see FIG. 7 and the like).

  The connecting portion 423 corresponds to the lower end portion of the character “7” and has a cylindrical portion that is extrapolated with respect to the support shaft 24 of the seat back 22. Accordingly, the connecting portion 423 is supported by the guide bracket 41 while being extrapolated with respect to the support shaft 24, and moves along the guide groove 413 together with the support shaft 24.

  The grip portion 421 corresponds to the upper end portion of the character “7”. As shown in FIG. 7 and the like, when the seat back 22 is in the normal state, the grip portion 421 is disposed so as to extend in a substantially horizontal direction.

  The fulcrum portion 422 corresponds to a central portion that is bent at the character “7”, and has a cylindrical portion that is inserted into a lever support hole 433 provided in the lever bracket 43.

  As shown in FIG. 4, the lever bracket 43 is mounted via a mounting bracket 133 that is mounted and fixed to the side wall of the wheel house inner 131 of the wheel house inner 131 and the wheel house outer 132 that constitute the wheel house 13. The wheel house inner 131 is fixed to the side of the vehicle interior. In FIG. 4, reference numeral 15 denotes a rear door.

  The lever bracket 43 is fixed to the mounting bracket 133 and has a plate-like fixing portion 431 extending substantially in the vertical direction, and a standing wall 432 erected from both side edges of the fixing portion 431 in the vehicle width direction, It is comprised including.

  As will be described later, an engaging portion 434 is formed at the lower end of the fixing portion 431 to engage the end portion of the tension coil spring 45 interposed between the operation lever 42 and the lever bracket 43 (see FIG. 10, 11, etc.).

  Each of the standing walls 432 has a relatively upper portion as a lever support portion that rotatably supports the operation lever 42, while a relatively lower portion supports the stopper 44 so as to be rotatable. The lever support portion has an outer edge shape of a substantially arc shape, whereas the stopper support portion has an outer edge shape of a substantially rectangular shape.

  The lever support portion is formed with a lever support hole 433 penetrating in the plate thickness direction, and the fulcrum portion 422 of the operation lever 42 is the lever in the state where the operation lever 42 is disposed between the compatibility walls 432. The operation lever 42 is rotatably supported around the fulcrum portion 422 by being inserted into the support hole 433 and being fixed with bolts and nuts.

  In a state where the operation lever 42 is supported by the lever bracket 43, one end portion of the tension coil spring 45 is engaged in the vicinity of the connecting portion 423 of the operation lever 42, and the other end portion of the tension coil spring 45 is The engaging portion 434 provided in the fixing portion 431 of the lever bracket 43 is engaged. When the operating lever 42 is rotated in the clockwise direction in FIG. 10 and the like by the tension coil spring 45, it is biased back in the counterclockwise direction. In the following, when referred to as “clockwise direction” and “counterclockwise direction”, “clockwise direction” and “counterclockwise direction” when viewed along an axis extending in the vehicle width direction from the left side of the vehicle. ".

  Further, as described above, the stopper 44 is rotatably supported by the stopper support portion of the lever bracket 43. As shown in FIG. 3 and the like, the stopper 44 is a small piece member, and one end of the stopper 44 supports a rotation support portion 441 that rotatably supports the stopper 44 around an axis extending in the vehicle width direction. The other end of the contact lever 42 abuts on the operation lever 42, and the contact lever 442 restricts the rotation of the operation lever 42 in the counterclockwise direction. The stopper 44 is rotatably attached to the stopper support portion of the lever bracket 43 by a screw, and the stopper 44 is rotated counterclockwise by a torsion coil spring 46 externally attached to the screw. Is urged to rotate.

  As will be described later, an intermediate position between the contact portion 442 and the rotation support portion 441 in the stopper 44 is connected to the reclining release operation lever 51 disposed on the upper support portion 3 via a release wire 52. A wire connecting portion 443 connected to each other is provided.

  As will be described in detail later, when the seat back 22 is shifted from the reclining state to the normal state, or when the seat back 22 is shifted from the normal state or the reclining state to the lying down state, the release wire 52 is pulled upward through the reclining release operating lever 51. As a result, the stopper 44 rotates in the clockwise direction against the urging force in the counterclockwise direction. Thus, by releasing the stopper 44 that restricts the operation lever 42 from rotating in the counterclockwise direction, the operation lever 42 can be rotated in the counterclockwise direction.

  For example, as shown in FIG. 5, the upper support portion 3 includes a latch mechanism 31 that engages with the striker 16 fixed to the vehicle body side.

  The latch mechanism 31 includes a claw portion 311 that engages with the striker 16, a latch release operation lever 312 that is operated when the claw portion 311 is disengaged, a claw portion 311, and a latch release operation. And a known link mechanism 313 that is interposed between the levers 312 and rotates the claw portion 311 so that the engagement with the striker 16 is released by the operation of the latch release operation lever 312. The claw portion 311 and the link mechanism 313 are housed in a housing.

  The latch mechanism 31 is fixed to the mounting bracket 25 disposed in the vicinity of the upper end portion of the seat back frame 23 and is disposed inside the seat back 22. Although not shown in detail, the claw portion 311 in the latch mechanism 31 is disposed so as to be exposed from the back surface of the seat back 22, and thus the claw portion 311 can be engaged with the striker 16. Has been.

  The latch release operation lever 312 in the latch mechanism 31 is disposed so as to protrude outward in the vehicle width direction through an opening 221 formed in the side surface of the seat back 22 and extending in the vertical direction. A cover 314 is attached to the.

  Here, the seat back frame 23 is divided up and down in the vicinity where the latch mechanism 31 is attached, and the mounting bracket 25 of the latch mechanism 31 is disposed between the divided seat back frames 23. . Specifically, the mounting bracket 25 is provided with elastic members 251 and 252 that can be expanded and contracted respectively on the upper side and the lower side, and each end portion of the divided seat back frame 23 is connected to the upper elastic member 251 and Each of the lower elastic members 252 is inserted and fixed.

  In addition, the seat back frame 23 has a curved shape that protrudes forward in the vicinity of the mounting position of the latch mechanism 31 as shown in FIGS.

  With such a configuration, as will be described later, when the seat back 22 changes state between the normal state (see FIG. 6A) and the reclining state (see the solid line in FIG. 6B), the seat back 22 moves up and down. Although the tilt angle is changed while moving in the direction, the latch mechanism 31 is relatively displaced by the expansion and contraction of the expansion members 251 and 252 as the seat back 22 and the seat back frame 23 move. As a result, the position of the latch mechanism 31 can be kept at a fixed position. Thus, since the position of the latch mechanism 31 does not change between when the seatback 22 is in the normal state and when it is in the reclining state, the latch mechanism 31 can remain engaged with the striker 16. it can. That is, only by providing the striker 16 on the vehicle body side, when the seat back 22 is in the normal state and the reclining state, the upper portion of the seat back 22 is always supported by the upper support portion 3.

  A reclining release operation lever 51 is engaged with the latch release operation lever 312 in the upper support portion 3. The reclining release operating lever 51 has a substantially U-shaped shape in which the left and right sides are reversed in a side view, and an upper portion thereof is a grip portion 511 held by an occupant, while a lower portion thereof is the release wire. The other end of 52 is connected to a connecting portion 512.

  As shown in FIG. 3, the reclining release operating lever 51 is supported by a support bracket 53 that is fixed to a vehicle body member (not shown), and is thereby arranged to move substantially vertically. Yes. That is, as shown in FIG. 3, the support bracket 53 is disposed so that the fixing portion 531 fixed to the member on the vehicle body and the cylinder axis thereof are substantially in the vertical direction, so that the reclining release operation lever 51 is provided. And a cylindrical portion 532 having openings at both ends into which the connecting portion 512 is inserted. A spring member (not shown) is disposed in the cylindrical portion 532 of the support bracket 53, and the reclining release operating lever 51 is urged downward by the spring member. Then, as shown in FIG. 6, the reclining release operation lever 51 has a latch release operation in which an upper end portion (gripping portion 511) extending substantially in the front-rear direction extends horizontally outwardly in the vehicle width direction. When the latch release operating lever 312 is operated upward to release the latch mechanism 31 as described above (see the arrow in FIG. 6A), As the lever 312 moves, the reclining release operation lever 51 also moves upward. Then, the release wire 52 is pulled upward, and the stopper 44 is released. Not only when the latch release operation lever 312 is operated, but also when the grip portion 511 of the reclining release operation lever 51 is gripped and lifted upward, the reclining release operation lever 51 is operated alone. It is also possible.

  Next, the operation of the seat 2 will be described with reference to FIGS. 7 shows a normal state of the seat 2 (seat back 22), FIG. 8 shows a reclining state in which the rearward tilt angle of the seat back 22 is larger than that in the normal state, and FIG. 9 shows the seat back 22 in the seat cushion 21. Shows the state of lying down.

  First, in the normal state of the seat 2, the operation lever 42 is positioned so that the grip portion 421 thereof is substantially horizontal, whereby the support shaft 24 disposed at the lower end portion of the seat back 22 is connected to the guide bracket 41. Is located at the lower end of the guide groove 413 (see the solid line in FIG. 10).

  In this state, the tension coil spring 45 engaged with the operation lever 42 is relatively contracted. Further, the stopper 44 is in contact with the rear surface of the operation lever 42 in the vicinity of the fulcrum portion 422 and is in a down posture so as to follow the rearward inclination of the seat back 22. At this time, the stopper 44 is urged counterclockwise in FIG. 10 by the urging force of the torsion coil spring 46.

  Although not shown in FIG. 7, the upper support portion 3 is engaged with the striker 16.

  When the operation lever 42 is pulled upward in this normal state, the operation lever 42 rotates about the fulcrum 422 in the clockwise direction in FIG. As the operation lever 42 rotates, the support shaft 24 inserted in the connecting portion 423 moves upward along the guide groove 413 of the guide bracket 41 and is positioned at the upper end portion thereof. The movement of the support shaft 24 causes the seat back 22 to move upward from the state indicated by the alternate long and short dash line in FIG. 8 so as to further increase the tilt angle and shift to the state indicated by the solid line. (See arrow in FIG. 8). Thus, the seat back 22 is in a reclining state. At this time, since the stopper 44 is urged counterclockwise, as shown in FIG. 11, the stopper 44 rotates counterclockwise along with the operation lever 42 and stands up. Thus, the contact portion 442 comes into contact with the rear end surface of the operation lever 42. Further, the tension coil spring 45 is relatively extended by the rotation of the operation lever 42 and biases the operation lever 42 in the counterclockwise direction. However, the operation lever 42 is supported by the standing stopper 44. Is prevented from rotating counterclockwise. Thus, the seat back 22 can be held in the reclining state.

  Further, as described above, the position of the upper support portion 3 (latch mechanism 31) does not change even when the seatback 22 is in either the normal state or the reclining state, but the illustration is omitted in FIG. The upper support 3 is engaged with the striker 16.

  In the reclining state, when the operation for lifting the reclining release operating lever 51 is performed upward, the release wire 52 is pulled upward, so that the stopper 44 in the standing state as shown in FIG. Rotate clockwise against As a result, the locking by the stopper 44 is released, so that the operation lever 42 urged counterclockwise by the tension coil spring 45 can be rotated counterclockwise (FIG. 10). , 11). Since the connecting portion 423 moves downward by rotating the operation lever 42, the support shaft 24 moves downward along the guide groove 413 and is positioned at the lower end portion of the guide groove 413. Then, while the seat back 22 moves downward from the reclining state, the inclination angle thereafter decreases, and the state shifts to the normal state.

  Further, when the latch release operation lever 312 is pulled upward in the normal state (see the one-dot chain line in FIG. 9), the claw portion 311 of the latch mechanism 31 rotates and the engagement with the striker 16 is released. Therefore, the seat back 22 can be rotated counterclockwise about the support shaft 24. Then, the seat back 22 can be laid down on the seat cushion 21 to be in a lying state (see the solid line in FIG. 9). In this state, there is almost no step between the back surface of the seat back 22 and the floor surface of the luggage compartment 12, and the back surface of the seat back 22 and the floor surface of the cargo compartment 12 are continuously connected by the floor mat 26.

  Further, when the latch release operation lever 312 is pulled upward in order to shift to the lying down state in the reclining state, the engagement between the latch mechanism 31 and the striker 16 is released as described above. The back 22 can be rotated counterclockwise about the support shaft 24. Further, when the latch release operation lever 312 is lifted upward, the reclining release operation lever 51 engaged therewith is also lifted upward. As described above, the stopper 44 is released and the operation lever 42 is released. By rotating counterclockwise, the seat back 22 also shifts from the reclining state to the normal state.

  As a result, when the seat back 22 is laid down on the seat cushion 21, the support shaft 24 is positioned at the lower end of the guide groove 413, so that the height position of the back surface of the seat back 22 is positioned at a low position. Is possible. Thus, when the transition from the normal state to the lying down state or from the reclining state to the lying down state is made, there is almost no step between the back surface of the seat back 22 and the floor surface of the luggage compartment 12, and both sides are substantially flat. Become one.

  As described above, since the seat cushion 21 and the seat back 22 are supported by the members on the vehicle body side independently of each other, the seat 2 has a simplified support structure. This is advantageous in reducing the cost.

  In the seat 2, when the seat back 22 is shifted to the reclining state, the seat back 22 is tilted so that the rearward tilt angle is further increased while the seat back 22 is moved upward. By moving the seat back 22 upward in this manner, it is possible to tilt the seat back 22 further backward than in the normal state while avoiding interference with the wheel house 13 disposed behind the seat back 22. Can do.

  Specifically, since the lower end portion of the seat back 22 is moved obliquely upward at the front, the amount by which the upper portion of the seat back 22 moves rearward is relatively small, and in order to avoid interference with the wheel house 13. Become advantageous. Thus, the rearward tilt angle of the seat back 22 can be further increased.

  Further, by combining the upward movement of the seat back 22 and the backward tilt, as shown in FIG. 12, the hip point P1 is moved forward while avoiding the sinking of the hip point P1 of the occupant seated there. be able to. As a result, the knee angle is prevented from becoming steep, and the seating posture can be optimized. In FIG. 12, the solid line indicates the reclining state, and the alternate long and short dash line indicates the normal state.

  Note that the grip portion 511 of the reclining release operation lever 51 may be omitted. In this case, although the reclining release operation lever 51 cannot be operated alone, the latch release operation lever 312 may be operated when shifting from the reclining state to the normal state.

  You may comprise so that the two operation levers 42 arrange | positioned at the vehicle width direction both sides of the seat back 22 may mutually interlock | cooperate. Similarly, the two latch release operation levers 312 may be interlocked with each other.

  Further, the seat back 22 is divided into two in the vehicle width direction, for example, 6: 4 division, and the divided seat backs 22 can be individually changed between the normal state, the reclining state, and the lying down state. You may comprise as follows.

(Embodiment 2)
The rear seat (seat) 2 shown in FIG. 13 is configured such that the seat cushion 21 moves in conjunction with the movement of the seat back 22. Thus, the seat 2 further optimizes the seating posture of the occupant.

  The seat cushion 21 of the seat 2 is disposed so as to extend in the vehicle width direction, and the lower edge of the front end thereof is supported by the floor panel 14 via the hinge member 17. As a result, the seat cushion 21 is in a normal state (see the one-dot chain line in FIG. 19) and a lifted state in which the seat cushion 21 is rotated counterclockwise about the front end portion and the rear end portion is lifted upward (FIG. 19). (See the solid line in FIG. 1).

  As shown in FIG. 15, the hinge member 17 has a so-called double hinge structure in which two rotation shafts extending in the vehicle width direction are arranged at a predetermined interval, and is fixed to the lower surface of the seat cushion 21. Between the seat-side fixing portion 171, the vehicle-side fixing portion 172 fixed to the vehicle floor panel 14, and the seat-side fixing portion 171 and the vehicle-side fixing portion 172. The intermediate part 173 connected so that rotation is possible is comprised. The hinge member 17 has a torsion coil spring 174 interposed between the intermediate portion 173 and the vehicle side fixing portion 172. The torsion coil spring 174 causes the hinge member 17 to move clockwise in FIG. It is energized.

  As shown in FIG. 14, two shafts 27 and 28 are provided at the rear end portion of the seat cushion 21 so as to protrude outward in the vehicle width direction from both side surfaces thereof. Although not shown, the shafts 27 and 28 are fixed to the seat cushion frame and integrated with the seat cushion 21.

  Of the two shafts, the shaft 27 disposed on the lower side and the front side is a support shaft 27 for moving the seat cushion 21 between the normal state and the lifted state, whereas the shaft 27 is relatively The shaft 28 arranged on the upper side and the rear side is connected to the seat back 22 so that the interlocking link 29 is pivotally connected, so that the movement of the seat cushion 21 and the movement of the seat back 22 are performed. Is an interlocking shaft 28 for interlocking with.

  As shown in FIG. 13, the operation lever 61 that is operated by the occupant, the lever bracket 62 that supports the operation lever 61, and the first connecting rod 651 with respect to the operation lever 61 are provided at the outer positions on both sides of the seat cushion 21. An intermediate link 66 connected via the intermediate link 66, a link bracket 68 supporting the intermediate link 66, a swing link 63 connected to the intermediate link 66 via a second connection rod 652, and a link supporting the swing link 63. A bracket 64 is provided.

  The operation lever 61 is disposed in the vicinity of the front end portion of the seat cushion 21. As shown in FIG. 14, the operation lever 61 includes a grip portion 611 that the occupant grips, a fulcrum portion 612 that is rotatably supported by the lever bracket 62, and a grip portion 611 that sandwiches the fulcrum portion 612. A connecting portion 613 of the first connecting rod 651 disposed on the opposite side and two operation levers 61 disposed in the vicinity of the connecting portion 613 and disposed on both sides of the seat cushion 21 are connected to each other. 614 for interlocking with each other. Note that the interlocking rod 615 connected to the interlocking portion 614 is disposed so as to extend in the vehicle width direction in the recessed portion 211 provided on the lower surface of the seat cushion 21 (see FIG. 16 and the like).

  The fulcrum portion 612 of the operation lever 61 has a cylindrical portion that is inserted into the lever support hole 623 of the lever bracket 62.

  The lever bracket 62 includes a plate-like fixing portion 621 that is fixed to the floor panel 14, and standing walls 622 that stand from both side edges of the fixing portion 621 in the vehicle width direction. Each of the standing walls 622 is formed with a lever support hole 623 penetrating in the thickness direction. In a state in which the operation lever 61 is disposed between the compatibility walls 622, the fulcrum portion 612 of the operation lever 61 is inserted into the lever support hole 623 and is fixed by a bolt and a nut. The fulcrum portion 612 is supported so as to be rotatable.

  The swing link 63 is a link for converting the movement of the operation lever 61 operated by the occupant into the movement of the seat cushion 21. The swing link 63 is a plate-like member having a predetermined shape in a side view, a fulcrum portion 631 provided at a substantially central position thereof and rotatably supported with respect to the link bracket 64, and A rod coupling portion 632 that is provided at the tip of an arm extending obliquely upward from the fulcrum portion 631 and is coupled to the rear end of the second connecting rod 652, and extends obliquely upward rearward from the fulcrum portion 631. A connecting portion 633 that is provided at the tip of the arm and that is externally attached to the support shaft 27 of the seat cushion 21.

  The fulcrum part 631 of the swing link 63 has a cylindrical part inserted into the link support hole 644 of the link bracket 64, while the rod connecting part 632 and the connecting part 633 are connected to the second connecting rod 652. A through hole into which the support shaft 27 is inserted is formed.

  The link bracket 64 is a bracket that supports the swing link 63 and is a bracket that supports the support shaft 27. The link bracket 64 is disposed behind the operation lever 61 and the lever bracket 62 on the side of the seat cushion 21 and extends substantially in the front-rear direction and is fixed to the floor panel 14. A portion 641 and a standing wall 642 erected from both side edges in the vehicle width direction of the fixed portion 641 are configured.

  As will be described later, an engaging portion 643 is formed at the rear end portion of the fixing portion 641 to engage with the end portion of the tension coil spring 66 interposed between the swing link 63 and the link bracket 64. Yes.

  Each standing wall 642 has a relatively front portion as a link support portion that supports the swing link 63 so as to be swingable, while a relatively rear portion supports a support shaft 27 of the seat cushion 21. It is considered to be a part.

  A link support hole 644 that penetrates in the thickness direction is formed in the link support portion, and the fulcrum portion 631 of the swing link 63 is formed with the swing link 63 disposed between the compatible walls 642. By being inserted into the link support hole 644 and fixed by bolts and nuts, the swing link 63 is supported swingably around the fulcrum 631. In this state, the rod coupling portion 632 of the swing link 63 is disposed so as to protrude forward from the link bracket 64.

  The guide portion is formed with a long hole 645 that penetrates in the plate thickness direction. As shown in an end view in FIG. 19, the long hole 645 is formed in a substantially arc shape that extends substantially in the vertical direction and is curved so as to protrude rearward. The long hole 645 is disposed through the support shaft 27 of the seat cushion 21 inserted in the connecting portion 633 of the swing link 63, and supports the support shaft 27 and eventually the rear end portion of the seat cushion 21. In addition, as will be described in detail later, when the seat cushion 21 is changed between the normal state and the lifted state, the support shaft 27 is guided along the elongated hole shape. Hereinafter, this long hole is referred to as a second guide groove 645.

  In a state where the swing link 63 is supported by the link bracket 64, one end portion of the tension coil spring 66 is engaged in the vicinity of the connecting portion 633 of the swing link 63, and the other end of the tension coil spring 66 is engaged. The portion engages with an engaging portion 643 provided on the fixing portion 641 of the link bracket 64. The swing link 63 is urged clockwise by the tension coil spring 66 in FIG.

  Further, a stopper 67 for restricting the swing link 63 from rotating in the clockwise direction is supported on the guide portion of the link bracket 64 so as to be rotatable.

  As shown in FIG. 14 and the like, this stopper 67 has one end portion as a rotation support portion 671 that rotatably supports the stopper 67 about an axis extending in the vehicle width direction, and the other end portion is rocked. It is a small piece of member that is a contact portion 672 that restricts the swing link 63 from rotating clockwise by contacting the lower surface of the moving link 63. The stopper 67 is attached so that its rotation support portion 671 can be rotated by a screw at a position below the second guide groove 645 in the guide portion of the link bracket 64. A torsion coil spring 68 is externally attached to the screw, and the stopper 67 is urged clockwise in FIG. 19 by the urging force of the torsion coil spring 68.

  A wire connecting portion 673 to which one end of the release wire 69 is connected is provided at an intermediate position between the contact portion 672 and the rotation support portion 671 in the stopper 67. The other end of the release wire 69 is engaged with a release coupling portion 664 in the intermediate link 66.

  The intermediate link 66 is a link that is disposed between the operation lever 61 and the swing link 63 and connects the operation lever 61 and the swing link 63 to each other, and has a plate shape having a predetermined shape in a side view. It is a member. The intermediate link 66 is provided at a substantially central position thereof, and is provided at a position above the fulcrum part 661 and a fulcrum part 661 that is rotatably supported with respect to the link bracket 68, and the first connecting rod 651 is coupled to the intermediate link 66. The first coupling portion 662 and the fulcrum portion 661 are provided at a position above the fulcrum portion 661, and the second coupling rod 652 is coupled to the second coupling portion 663 and at a position below the fulcrum portion 661, and the release wire 69 is coupled. And a release coupling portion 664 for performing.

  The fulcrum 661 of the intermediate link 66 is formed with a through hole through which the support shaft is arranged, together with the link support hole 683 of the link bracket 68.

  The first coupling portion 662 and the second coupling portion 663 of the intermediate link 66 are formed with through holes to which the first coupling rod 651 and the second coupling rod 652 are coupled, respectively. Among these, the through hole formed in the second coupling portion 663 is formed in a long hole shape, and as will be described in detail later, when the operation lever 61 is operated, a stopper 67 via a release wire 69 is provided. And the swing timing of the swing link 63 are shifted from each other.

  Further, the release coupling portion 664 of the intermediate link 66 is formed with a through hole to which the release wire 69 is coupled.

  The link bracket 68 has a shape similar to that of the lever bracket 62, and stands from a plate-like fixing portion 681 fixed to the floor panel 14 and both side edges of the fixing portion 681 in the vehicle width direction. The standing wall 682 is provided with a link support hole 683 penetrating in the thickness direction. In a state where the intermediate link 66 is disposed between the compatibility walls 682, the fulcrum portion 661 of the intermediate link 66 is fixed to the link support hole 683 by bolts and nuts, so that the intermediate link 66 is supported by the fulcrum. It is supported so as to be rotatable about the portion 661.

  The first connecting rod 651 extends substantially in the front-rear direction, and connects the coupling portion 613 of the operation lever 61 and the first coupling portion 662 of the intermediate link 66 to each other. The second connecting rod 652 extends substantially in the front-rear direction and connects the second coupling portion 663 of the intermediate link 66 and the rod coupling portion 632 of the swing link 63 to each other. As a result, the turning operation force of the operating lever 61 is transmitted to the swing link 63 via the first connecting rod 651, the second connecting rod 652 and the intermediate link 66, thereby turning the swing link 63. .

  That is, when the grip 611 of the operation lever 61 is operated to be pulled upward from the normal state and the operation lever 61 is rotated in the clockwise direction in FIG. 19, the first connecting rod 651 is pulled forward. Therefore, the first coupling portion 662 of the intermediate link 66 moves forward, and the intermediate link 66 rotates counterclockwise. Since the second link rod 652 coupled to the second coupling portion 663 is also pulled forward by the rotation of the intermediate link 66, the coupling of the swing link 63 is coupled via the second link rod 652. The part 632 moves obliquely downward in the front, and the swing link 63 rotates in the counterclockwise direction. By the rotation of the swing link 63, the connecting portion 633 is moved obliquely upward in the front, so that the support shaft 27 of the seat cushion 21 inserted therein is also moved forward along the second guide groove 645. As a result, the rear end portion of the seat cushion 21 moves obliquely upward at the front. That is, the seat cushion 21 is turned counterclockwise about the front end portion thereof, and is in a lifted state.

  On the other hand, when the operation lever 61 is rotated counterclockwise in FIG. 19 so that the grip 611 of the operation lever 61 is pushed downward from the pulled-up state and returned to the normal state, the first connecting rod 651 is rotated. Is pushed rearward, the first coupling portion 662 of the intermediate link 66 moves rearward, and the intermediate link 66 rotates clockwise. With the rotation of the intermediate link 66, the release wire 69 coupled to the release coupling portion 664 is pulled forward, thereby releasing the stopper 67 (this will be described later). Here, since the through hole of the second coupling portion 663 engaged with the second connecting rod 652 has a long hole shape, even if the intermediate link 66 rotates in the clockwise direction, the second connecting rod is initially set. The joint portion of 652 does not engage with the edge of the elongated hole, but only idles relatively in the elongated hole. Only after the relative movement, the coupled portion of the second connecting rod 652 and the elongated hole are engaged. In combination, the second connecting rod is pushed backward. Then, the swing link 63 rotates in the clockwise direction so as to be pushed by the second connecting rod 652, and the connecting portion 633 moves obliquely downward at the rear. As a result, the support shaft 27 of the seat cushion 21 inserted therein also moves rearward and obliquely downward along the second guide groove 645, and the rear end portion of the seat cushion 21 is inclined rearward and downward. Move towards. That is, the seat cushion 21 is rotated in the clockwise direction around the front end portion, and is in a normal state.

  In this way, by forming the second coupling portion 663 of the intermediate link 66 in the shape of an elongated hole, when the intermediate link 66 is rotated in the clockwise direction, the stopper 67 is released by the release wire 69 and then the swinging is performed. The seat cushion 21 is rotated by the rotation of the moving link 63.

  One end of an interlock link 29 is rotatably fixed to the interlock shaft 28 of the seat cushion 21. The interlocking link 29 is a plate-like member that extends in the vertical direction between the rear end portion of the seat cushion 21 and the lower end portion of the seat back 22 and has a predetermined curved shape. A through hole that is extrapolated to the interlocking shaft 28 of the seat cushion 21 is formed at the lower end portion of the interlocking link 29, and a cylindrical portion that is extrapolated to the support shaft 24 of the seat back 22 is provided at the upper end portion. .

  In the same manner as the seat 2 of the first embodiment, the seat back 22 is supported by the upper support portion 3 and the lower support portion 4 so that the relatively upper portion and the lower portion are respectively supported by the members on the vehicle body side. ing. Of these, although not shown in detail here, the upper support portion 3 includes a latch mechanism that engages with a striker fixed to the vehicle body side and is operated by a latch release operation lever 312. It is the same structure as the upper side support part 3 of Embodiment 1. The latch mechanism is fixedly attached to the seatback frame 23 via a mounting bracket, and the mounting bracket is fixed to the seatback frame 23 via an upper elastic member and a lower elastic member. ing. For this reason, since the position of the latch mechanism does not change between when the seatback 22 is in the normal state (see the alternate long and short dash line in FIG. 17) and when in the reclining state (see the solid line in FIG. 17), the latch mechanism is Can remain engaged.

  Note that the reclining release operating lever 51 provided in the seat 2 of the first embodiment is omitted in the seat 2 of the second embodiment.

  As shown in FIG. 14, the lower support portion 4 includes a guide bracket 47. The guide bracket 47 is a bracket for supporting the support shaft 24 provided at the lower end portion of the seat back 22.

  Here, the support shaft 24 is formed in an L shape so as to bend from the side surface to the back surface of the seat back 22, and although not illustrated, the support shaft 24 is not attached to the bracket 241 fixed to the seat back frame 23. By being fixed in this way, it protrudes outward in the vehicle width direction from each of the rear end portions on both side surfaces of the seat back 22. As described above, various forms can be adopted for fixing the support shaft 24 and the seat back 22.

  The guide bracket 47 is configured to include a fixing portion 471 and a support portion 472 extending obliquely upward and forward from the fixing portion 471 by, for example, bending a plate-like member. As shown in FIG. 13, the fixing portion 471 is fixed to the floor panel 14 at the side position of the seat 2.

  The support portion 472 is disposed at the lower end portion of the side surface of the seat back 22 so as to face the side surface. The support portion 472 is formed with a long hole (guide groove) 473 formed so as to penetrate in the plate thickness direction. The guide groove 473 extends substantially in the vertical direction, and unlike the guide groove in the seat according to the first embodiment, the guide groove 473 is formed in a curved arc shape so as to protrude rearward (see FIG. 19).

  In the guide groove 473, as described above, the support shaft 24 of the seat back 22 inserted in the cylindrical portion formed at the upper end portion of the interlocking link 29 is disposed so as to pass therethrough. This support shaft 24 and thus the lower end of the seat back 22 are supported. As will be described in detail later, the guide groove 473 guides the support shaft 24 substantially in the vertical direction when changing the state of the seat 2 between the normal state and the reclining state.

  Next, the operation of this sheet will be described with reference to FIGS. 16 shows a normal state of the seat 2, FIG. 17 shows a reclining state in which the rearward tilt angle of the seat back 22 is larger than that in the normal state, and FIG. 18 shows the seat back 22 lying on the seat cushion 21. , Indicating a state of lodging.

  First, in the normal state of the seat 2, the gripping portion 611 of the operation lever 61 is disposed so as to be substantially horizontal, whereby the support shaft 27 disposed at the rear end portion of the seat cushion 21 is connected to the link bracket 64. The support shaft 24 disposed at the lower end portion of the seat back 22 is positioned at the lower end portion of the guide groove 473 of the guide bracket 47 (FIG. 19). (See dash-dot line).

  In this state, the tension coil spring 66 engaged with the operation lever 61 is in a relatively contracted state (not shown in FIG. 19). In addition, the stopper 67 is in contact with the lower end of the swing link 63 in the vicinity of the fulcrum part 631 and is in a lying posture. At this time, the stopper 67 is urged clockwise by the urging force of the torsion coil spring 68.

  Moreover, although illustration is abbreviate | omitted in FIG. 16, the upper side support part 3 is engaging with respect to the striker.

  When the operation lever 61 is lifted upward in this normal state, the operation lever 61 rotates clockwise about the fulcrum portion 612. As the operation lever 61 rotates, the first connecting rod 651 is pulled forward, so that the intermediate link 66 rotates counterclockwise. As the intermediate link 66 rotates, the second connecting rod 652 is also pulled forward, so that the swing link 63 rotates counterclockwise about the fulcrum 631. As a result, the support shaft 27 of the seat cushion 21 inserted in the connecting portion 633 moves upward along the second guide groove 645 of the link bracket 64 and comes to be positioned at the upper end portion thereof. The movement of the support shaft 27 causes the seat cushion 21 to rotate counterclockwise around the front end portion from the state indicated by the alternate long and short dash line in FIG. 17, and the rear end portion is positioned upward. It will shift to the upper state.

  As the seat cushion 21 moves, the interlocking shaft 28 also moves upward, so that the support shaft 24 of the seat cushion 21 moves upward along the guide groove 473 of the guide bracket 47 through the interlocking link 29. Thus, the support shaft 24 of the seat back 22 is positioned at the upper end portion of the guide groove 473, and the seat back 22 moves upward while the tilt angle further increases. In this way, in conjunction with the movement of the seat cushion 21, the seat back 22 also shifts from the state indicated by the alternate long and short dash line in FIG. 17 to the state indicated by the solid line, and the seat 2 enters the reclining state. Thus, by interlocking the movement of the seat cushion 21 and the movement of the seat back 22, the gap between the seat cushion 21 and the seat back 22 can be reduced in the reclining state.

  Here, since the stopper 67 is biased in the clockwise direction, in this reclining state, as shown by the solid line in FIG. It will be in the state. Then, the contact portion 672 comes into contact with the lower surface of the swing link 63. In addition, the tension coil spring 66 is relatively extended by the rotation of the swing link 63 and biases the swing link 63 in the clockwise direction, but the swinging link 63 is swung by the standing stopper 67. The link 63 is prevented from rotating clockwise. Thus, the seat back 22 and the seat cushion 21 can be held in the reclining state.

  Further, as described above, the position of the upper support portion 3 (latch mechanism 31) does not change even when the seat back 22 is in the normal state or the reclining state. The upper support 3 is engaged with the striker.

  When the operation lever 61 is pushed down in the reclining state, the operation lever 61 rotates counterclockwise, so that the first connecting rod 651 is pushed backward, and the intermediate link 66 rotates clockwise. Move. At this time, the release wire 69 coupled to the release coupling portion 664 of the intermediate link 66 is pulled forward, so that the stopper 67 is rotated counterclockwise and the stopper 67 is released. After the stopper 67 is released, the second connecting portion 663 of the intermediate link 66 and the second connecting rod 652 are connected to each other, and the second connecting rod 652 is pushed backward. As a result, the second connecting rod 652 causes the swing link 63 from which the stopper 67 is released to rotate in the clockwise direction, and the connecting portion 633 moves downward accordingly. It moves downward along the second guide groove 645 and is positioned at the lower end of the second guide groove 645. Then, the rear end of the seat cushion 21 moves downward and shifts from the lifted state to the normal state.

  As the seat cushion 21 moves, the support shaft 24 of the seat back 22 also moves downward along the guide groove 473 via the interlocking link 29. As a result, while the seat back 22 moves downward from the reclining state, the tilt angle thereafter decreases, and the seatback 22 shifts to the normal state.

  In the normal state, when the latch release operation lever 312 is pulled upward, as described above, the engagement between the latch mechanism 31 and the striker is released. It becomes possible to rotate counterclockwise as the center, and the seat back 22 can be laid down on the seat cushion 21 to be in a lying state. In this state, for example, as in the state shown in FIG. 9, there is almost no step between the back surface of the seat back 22 and the floor surface of the luggage compartment 12, and the back surface of the seat back 22 and the floor surface of the luggage compartment 12 are Continuously connected by the floor mat 26.

  Further, in the reclining state, the seat back 22 can be rotated in the counterclockwise direction around the support shaft 24 when the latch release operation lever 312 is pulled upward to shift to the lying state. become. At this time, since the seat back 22 rotates with the support shaft 24 of the seat back 22 positioned at the upper end of the guide groove 473, when the seat back 22 is laid down on the seat cushion 21, FIG. As shown in FIG. 18, the height position of the back surface of the seat back 22 is positioned at a higher position as compared with the case where the seatback 22 is shifted from the normal state to the lying down state.

  As described above, since the seat cushion 21 and the seat back 22 are supported by the members on the vehicle body side independently of each other, the seat 2 has a simplified support structure. This is advantageous in reducing the cost.

  In the seat 2, when the seat back 22 is shifted to the reclining state, the seat back 22 is tilted so that the tilt angle is further increased while the seat back 22 is moved upward. As a result, it is possible to further tilt the seat back 22 backward than in the normal state while avoiding interference with the wheel house 13.

  Specifically, by combining the upward movement of the seat back 22 and the backward tilt, as shown in FIG. 20, the hip point P1 of the occupant sitting there is prevented from sinking, and the hip point P1 is moved forward. Can be moved. At the same time, in the reclining state, by moving the rear end of the seat cushion 21 upward, the knee angle and the hip angle are expanded to further optimize the seating posture of the occupant. be able to. In FIG. 20, the solid line indicates the reclining state, and the alternate long and short dash line indicates the normal state.

  The seat back 22 is divided into two in the vehicle width direction, for example, 6: 4 division, and the divided seat backs 22 can be individually changed between the normal state, the reclining state, and the lying down state. You may comprise as follows.

  In addition, when the latch release operation in the upper support portion 3 and the reclining release operation in the lower support portion 4 are interlocked to shift from the reclining state to the lying down state, the reclining state is released and the rear surface of the seat back 22 is released. The height position may be positioned at a low position.

  As described above, the present invention realizes reclining of the seat back and makes it possible to optimize the posture of the occupant seated there even if there are interference objects behind the seat back. It is useful as a seat device constituting the rear seat.

It is the schematic which shows an example of a vehicle. 4 is a perspective view of a seat according to Embodiment 1. FIG. It is a disassembled perspective view of a lower side support part. It is a perspective view which shows the attachment structure with respect to the vehicle body of an operation lever. It is a perspective view which expands and shows the arrangement | positioning location of an upper side support part. It is a partially broken side view which expands and shows the arrangement | positioning location of an upper side support part. It is a side view which shows the sheet | seat of a normal state. It is a side view which shows the sheet | seat of a reclining state. It is a side view which shows the sheet | seat of a lying state. FIG. 10 is an enlarged explanatory view showing the movement of the lower support portion when changing the state of the seat from the normal state to the reclining state. It is an enlarged explanatory view showing the movement of the lower support portion when changing the state of the seat from the reclining state to the normal state. It is side surface explanatory drawing which each shows the attitude | position of a passenger | crew when a seat exists in a normal state and a reclining state. 6 is a perspective view of a seat according to Embodiment 2. FIG. It is a disassembled perspective view of a lower side support part. It is a disassembled perspective view of a hinge member. It is a side view which shows the sheet | seat of a normal state. It is a side view which shows the sheet | seat of a reclining state. It is a side view which shows the sheet | seat of a lying state. It is an enlarged explanatory view showing the movement of the lower support portion when changing the state of the seat between the normal state and the reclining state. It is side surface explanatory drawing which each shows the attitude | position of a passenger | crew when a seat exists in a normal state and a reclining state.

Explanation of symbols

1 Vehicle 13 Wheelhouse 14 Floor panel (vehicle body side member)
16 striker (body side member)
21 Seat cushion 22 Seat back 23 Seat back frame 251 Extendable member (sliding allowance)
252 Stretchable member (slidable part)
27 Seat cushion support shaft (movement mechanism)
29 Linkage (linkage mechanism)
3 Upper support portion 31 Latch mechanism 4 Lower support portion 413 Guide groove 42 Operation lever (operation portion)
44 Stopper (holding mechanism)
47 Guide bracket (guide mechanism)
473 Guide groove (guide mechanism)
61 Control lever (control unit)
52 Release wire (release mechanism)
63 Swing link (movement mechanism)
645 Second guide groove (movement mechanism)

Claims (7)

A seat including a seat cushion and a seat back that are disposed close to the front side of a wheel house that is disposed to project inward in the vehicle width direction and that are supported by members on the vehicle body side independently of each other. A vehicle seat device comprising:
An upper support portion for supporting a relatively upper portion of the seat back, and a lower support portion for supporting a relatively lower portion;
An operation unit operated by a passenger,
As the operating portion is operated, the seat back is supported by the upper and lower support portions, and the seat back is raised from a normal state where the seat back is raised at a predetermined rearward tilt angle. A guide mechanism for moving the seat back so as to shift to a reclining state in which the tilt angle is further increased while moving, and
A vehicle seat device comprising: a holding mechanism that holds the seat back in the reclining state. The vehicle seat device according to claim 1,
The lower support portion is configured to support a lower end portion of the seat back,
The guide mechanism includes a guide member that is provided in the lower support portion and moves a lower end portion of the seat back obliquely forward upward when the seat back shifts from the normal state to the reclining state. The vehicle seat device. The vehicle seat device according to claim 1 or 2,
A seat back frame that is disposed inside the seat back and to which the upper support portion is fixed;
The guide mechanism is a slide allowing portion that allows the upper support portion to slide relative to the seat back frame when the seat back changes state between the normal state and the reclining state. A vehicle seat device comprising: The vehicle seat device according to claim 3,
The seat back frame is a vehicle seat device in which at least a part of the seat back frame is curved in a direction in which it bulges forward so that a locus of relative sliding movement of the upper support portion is curved in a side view of the vehicle. In the vehicle seat device according to any one of claims 1 to 4,
The seat back is further configured to be able to fall on the seat cushion by rotating forward about the lower end thereof,
The upper support portion supports a relatively upper portion of the seat back by engaging with a member on the vehicle body side in the normal state and the reclining state, while accompanying the operation of the operation portion. A vehicle seat device including a latch mechanism for releasing the engagement when shifting from the normal state or the reclining state to the lying down state. The vehicle seat device according to claim 5,
A vehicle seat device further comprising a release mechanism for releasing the holding mechanism when the seat back is shifted from the reclining state to the lying down state. In the vehicle seat device according to any one of claims 1 to 5,
A movement mechanism for moving the seat cushion so that the seat cushion shifts from a normal state to a lifting state in which the rear end portion is moved at least upward;
An interlocking mechanism that interlocks the state change of the seat back between the normal state and the reclining state and the state change of the seat cushion between the normal state and the lifting state; A vehicle seat device further provided.

Images