JP4156466B2 - Vehicle seat structure - Google Patents

Description

  The present invention relates to a vehicle seat structure that can be tilted to the floor side.

As for the vehicle seat structure that can be tilted down to the floor side, the seat back is rotatably connected to the higher floor for the seat provided at the boundary between the lower floor and the higher rear floor. There is a vehicle seat structure capable of so-called dive-down storage, in which the seat cushion and the seat back are moved forward while the cushion is flipped up to the seat back side and the seat cushion is dropped and stored on the lower floor side (for example, Patent Document 1).
JP 2002-362202 A

  However, in the above-described vehicle seat structure, when the seat cushion and the seat back are moved forward while the seat cushion is flipped up to the seat back side, in other words, the seat cushion is dropped into the lower floor. There is a problem that the installation position with respect to the shape of the floor has to be set so as not to interfere with the floor, and the degree of freedom of the installation position is low.

  Therefore, an object of the present invention is to provide a vehicle seat structure that can increase the degree of freedom of the installation position with respect to the floor shape.

In order to achieve the above object, the invention according to claim 1 is configured to swing a seat cushion (for example, the seat cushion 25 in the embodiment) toward the seat back (for example, the seat back 26 in the embodiment) and to move the seat back forward. A vehicle seat structure in which the seat cushion and the seat back are tilted to the floor (for example, the floor 10 in the embodiment) by being tilted, and the bracket (for example, the embodiment) that rotatably connects the seat cushion to the seat back. Bracket 51), a slider (for example, slider 42 in the embodiment) provided at the rear portion of the bracket, and a guide groove (for example, a guide in the embodiment) provided in the seat back that slidably supports the slider. the provided groove 40) and Shitokusshi Along down the height direction of the seat back to the seat back becomes a slidable, one side rotatably connected to the other side rotatably connected links on the floor on the slider (e.g., link 43 in the embodiment) The link is characterized by moving the slider along the guide groove as the seat back is moved forward.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the link and the bracket are connected to the slider via a common connecting shaft (for example, the connecting shaft 44 in the embodiment) . .

The invention according to claim 3 is the seat according to claim 1 or 2, wherein the position of the link connecting portion (for example, the link connecting portion 48 in the embodiment) for connecting the link to the floor is the position for connecting the seat back to the floor. It is characterized in that it is located below and in front of the position of the back connecting portion (for example, the seat back connecting portion 37 in the embodiment) .

According to the first aspect of the invention, since the seat cushion is connected to the seat back so as to be slidable along the height direction, the seat cushion is swung to the seat back side and the seat back is moved forward. When the seat cushion and the seat back are brought down to the floor side by tilting, the position of the seat cushion can be adjusted in the front-rear direction with respect to the seat back. Therefore, by adjusting the position of the seat cushion, even if it is an installation position where the seat cushion would interfere with the higher floor when the seat back was swung forward and the seat back was moved forward, The seat cushion can be stored on the lower floor side. Thereby, the freedom degree of the installation position with respect to the shape of a floor can be made high. Also, the seat cushion for slidably connected to the seat back, the movement locus of the sheet bar click can be easily set.

  An embodiment which is the best mode of the present invention will be described below with reference to the drawings. Note that the front, rear, left and right used in the following description are front, rear, left and right in the traveling direction when the vehicle moves forward.

  The vehicle seat structure of the present embodiment is applied to a rear seat 12 in a vehicle in which a front seat 11 and a rear seat 12 are provided on a floor 10, as shown in FIG.

  The floor 10 includes a lower floor 15 on which the front seat 11 is disposed, a higher floor 16 formed one step higher than the lower floor 15 on the rear side of the lower floor 15, and a rear end side of the lower floor 15 on the higher floor. And the rear seat 12 to which the vehicle seat structure of the present embodiment is applied is in the vicinity of the boundary position between the lower floor 15 and the higher floor 16. Is arranged. A gasoline tank 18 is disposed below the lower floor 15.

  The front seat 11 is provided on the back side of the seat cushion 20 that mainly supports the occupant of the occupant, the seat back 21 that mainly supports the back of the occupant, and the seat cushion 20 of the seat back 21. And a headrest 22 that mainly supports the rear head of the occupant, and the seat back 21 is configured such that the seat cushion 20 side is rotatable about an axis along the vehicle width direction.

  The rear seat 12 is provided on the rear side of the seat cushion 25 that mainly supports the occupant of the occupant, the seat cushion 25 that supports the back portion of the occupant, and on the opposite side of the seat cushion 25 of the seat back 26. The seat back 26 is provided so as to be able to rotate around an axis along the vehicle width direction.

  The seat back 26 of the rear seat 12 includes a seat back main body 30 that supports the back of the occupant while standing upright with cushioning properties, and a seat back frame 31 that holds the seat back main body 30. Yes. Here, the height direction of the seat back 26 is a vertical direction in a standing state in which the seat back 26 is erected so that the back of the occupant can be supported.

  The seat cushion 25 of the rear seat 12 includes a seat cushion body 33 that has cushioning properties and supports the occupant's buttocks, and a seat cushion frame 34 that holds the seat cushion body 33.

  The seat back 26 of the rear seat 12 has a seat back frame 31 protruding from the seat back main body 30 to the opposite side of the headrest 27 in the height direction of the seat back main body 30, and on the upper floor portion 36 of the high floor 16. The seat back connecting portion 37 provided in the seat back connecting portion 37 is connected to the seat back connecting portion 37 so as to be rotatable around a fixed connecting shaft 38 along the vehicle width direction. The seat back 26 is locked by a rotation lock mechanism (not shown) in a standing state where the seat back 26 rises up from the connecting shaft 38 and extends slightly rearward. When an operation unit (not shown) to be operated is operated, a forward movement state is established in which the operation portion is moved forward so as to extend forward from the connecting shaft 38 by a biasing force of a spring (not shown).

  As shown in FIG. 2, a guide member 41 in which a guide groove 40 extending along the height direction of the seat back 26 is formed on a side portion in the vehicle width direction on the seat back 26 of the rear seat 12. A slider 42 that moves along the guide groove 40 by being guided by the guide groove 40 is coupled to the guide member 41 so as to be non-rotatable and slidable. One end of a rod-shaped link 43 is connected to the slider 42 via a connecting shaft 44 extending in the vehicle width direction so as to be rotatable about the connecting shaft 44. Further, as shown in FIG. 1, the link 43 is fixed at a position along the vehicle width direction of the link connecting portion 48 provided on the lower floor portion 47 where the other end side of the link 43 is lower than the upper floor portion 36 of the higher floor 16. Are connected so as to be rotatable about the connecting shaft 49. Note that the position of the connecting shaft 49 of the link connecting portion 48 is lower and the front side than the position of the connecting shaft 38 of the seat back connecting portion 37.

  A bracket 51 is fixed to the seat back 26 side of the seat cushion frame 34. As shown in FIG. 2, the bracket 51 is connected to a slider 42 provided in the guide groove 40, and a connecting shaft 44 that is common to the link 43. And are connected so as to be rotatable around the connecting shaft 44. Since the slider 42 is slidable along the guide groove 40, the seat cushion 25 connected to the slider 42 at the bracket 51 extends in the height direction of the seat back 26, which is the extending direction of the guide groove 40. It can slide along.

  As shown in FIG. 1, a leg portion 54 is provided at one end of the seat cushion frame 34 so as to be rotatable around the connecting shaft 53 via a connecting shaft 53 extending in the vehicle width direction. At the boundary position between the lower floor 15 and the upright wall 17, a detachable connecting portion 55 for detachably connecting the other end side of the leg portion 54 is provided. The attachment / detachment connecting portion 55 is released from the connection with the leg portion 54 by operating an operation portion (not shown) that is manually operated. The seat cushion 25 is urged by a spring (not shown) so as to be in a swinging state in which the seat cushion 25 swings toward the seat back 26 and a seating surface comes into contact with the seat back 26. Further, the leg portion 54 is biased by a spring (not shown) so as to be folded to the seat cushion 25 side.

  In the vehicle seat structure of the present embodiment described above, in the seatable state in which the rear seat 12 can seat an occupant, as shown in FIGS. The seatback connecting portion 37 provided on the floor portion 36 is locked by a rotation lock mechanism (not shown) in a standing state where the seatback connecting portion 37 is raised upward and slightly rearward from the connecting shaft 38. In this state, the link 43 is raised upward and slightly rearward from the connecting shaft 49 of the link connecting portion 48 provided on the lower floor portion 47 of the higher floor 16. The slider 42 thus connected is positioned below the guide groove 40 of the guide member 41. In addition, in this state, the seat cushion 25 connected to the connecting shaft 44 of the slider 42 via the bracket 51 extends the leg portion 54 downward and is connected to the detachable connecting portion 55 of the lower floor 15. As a result, the seat cushion 25 is seated so as to extend forward and slightly upward from the seat back 26 side.

  Then, from this seatable state of the rear seat 12, when the connection with the leg portion 54 of the detachable connecting portion 55 is released by manually operating an operation portion (not shown) of the detachable connecting portion 55, as shown in FIG. The swinging state in which the seat cushion 25 is rotated around the connecting shaft 44 while the leg portion 54 is separated from the detachable connecting portion 55 by the biasing force of a spring (not shown) and swings toward the seat back 26 in the standing state. At this time, the leg portion 54 is also folded to the seat cushion 25 side by a biasing force of a spring (not shown). Even in this swinging state, since the seat back 26 is maintained in the standing state, the link 43 is connected to the link connecting portion 48 in a state where it is raised upward and slightly rearward from the connecting shaft 49. The slider 42 connected via the shaft 44 is positioned below the guide groove 40 of the guide member 41.

  The operation part of the rotation lock mechanism (not shown) is manually operated from the jumping state of the rear seat 12 in which the seat back 26 is in the standing state, the seat cushion 25 is in the swinging state, and the leg portion 54 is in the folded state. Then, when the lock of the rotation lock mechanism is released, as shown in FIG. 4, the seat back 26 is rotated around the connecting shaft 38 of the seat back connecting portion 37 by the urging force of a spring (not shown), and together with the seat cushion 25 Move forward. At this time, the seat back 26 rotates about the connecting shaft 38 of the seat back connecting portion 37, but the slider 42 connected to the seat cushion 25 has a turning radius determined by the link 43 connected thereto. Turn on a turning trajectory. Then, the connecting shaft 49 and the slider of the link connecting portion 48 connected by the link 43 rather than the distance between the connecting shaft 38 of the seat back connecting portion 37 and the connecting portion 44 of the slider 42 when the seat back 26 is in the standing state. 42 is larger in distance from the connecting shaft 44, and the connecting shaft 49 of the link connecting portion 48 serving as the turning center is located in front of the connecting shaft 38 of the seat back connecting portion 37. The slider 42 is moved along the guide groove 40 and is slid along the height direction of the seat back 26 toward the headrest 27 side, that is, the front side. In addition, the sliding amount is increased as the forward angle of the seat back 26 increases. As a result, the seat cushion 25 connected to the seat back 26 by the slider 42 slides toward the headrest 27 side, that is, the front side along the height direction of the seat back 26 so that the sliding amount increases as the forward angle increases. Thus, the lower floor 15 is accommodated while avoiding interference with the higher floor 16. As described above, the rear seat 12 is brought into a collapsed state where the rear seat 12 is collapsed to the floor 10 side.

  In order to prevent the headrest 27 of the rear seat 12 from interfering with the front seat 11 when the rear seat 12 is tilted in this way, the headrest 27 is placed on the back side of the seat back 26 (upper ) May be configured to be retractable.

  As described above, the slider 42 provided on the seat cushion 25, the guide groove 40 provided on the seat back 26 that slidably supports the slider 42, one side of the slider 42 is rotatably connected, and the other side of the floor 10 is provided. When the seat cushion 25 is swung to the seat back 26 side and the seat back 26 is moved forward by the link 43 that is rotatably connected to the higher floor 16, the seat back 26 is moved forward (more specifically, more specifically). The seat cushion 25 is moved along the height direction of the seat back 26 with respect to the seat back 26 in conjunction with the forward movement of the seat cushion 25 and the seat back 26 in a state where the seat cushion 25 is flipped up to the seat back 26 side. Thus, an interlocking slide mechanism 57 that slides toward the headrest 27 side is configured. The interlocking slide mechanism 57 is provided on each of the left and right sides of the rear seat 12.

  According to the vehicle seat structure of the present embodiment described above, in the rear seat 12, the seat cushion 25 is swung to the seat back 26 side, and the seat back 26 is connected to the floor 10 at the seat back connection position. When the link shaft 38 of the portion 37 is moved forward about the link shaft 48 of the floor 10, the link 43 whose one side is rotatably connected to the connection shaft 49 of the link connection portion 48 of the floor 10 is moved to the other side, that is, the slider 42 connected to the connection shaft 44. The guide member 41 is moved along the guide groove 40 and slid along the height direction of the seat back 26 toward the headrest 27 side, that is, the front side. Thus, the seat cushion 25 connected to the seat back 26 by the slider 42 slides toward the headrest 27 side, that is, the front side along the height direction of the seat back 26 and is stored on the lower floor 15 side. As described above, even when the seat cushion 25 is swung toward the seat back 26 and the seat back 26 is tilted forward, even if the seat cushion 25 interferes with the high floor 16 conventionally, the interlocking slide The mechanism 57 can be accommodated on the lower floor 15 side by automatically sliding the seat cushion 25 toward the headrest 27 side, that is, the front side in conjunction with the forward movement of the seat back 26. Thereby, the freedom degree of the installation position with respect to the shape of the floor 10 can be made high by the interlocking slide mechanism 57 of a simple structure. In addition, since the seat cushion 25 is slidably coupled to the seat back 26, the movement locus of the seat back 26 can be easily set.

  Further, since the interlock slide mechanism 57 slides the seat cushion 25 in conjunction with the forward movement of the seat back 26, the seat cushion 25 is simply lifted to the seat back 26 side in the standing state. The position of the seat cushion 25 when used in the flipped-up state can be lowered without sliding the 25.

  In the above-described embodiment, the case where the seat cushion 25 is once swung and flipped up with respect to the seatback 26 in the standing state and then the seatback 26 is moved forward is described as an example. By moving the seat back 26 forward without raising the seat cushion 25, the seat cushion 25 is swung to the seat back 26 side by the forward movement of the seat back 26, and the seat cushion 25 is seated by the interlocking slide mechanism 57. By sliding the back 26 in the height direction, the rear seat 12 can be brought down toward the floor 10 and the seat cushion 25 can be stored in the lower floor 15.

  In the first embodiment, the case where the present invention is applied to the rear seat 12 has been described as an example. However, as the rear seat 12, the second row seat in the case of a vehicle adopting a two row seat structure is, of course, The present invention can also be applied to a second row seat, a third row seat, or the like in the case of a vehicle adopting a three row seat structure.

It is a side view which shows the vehicle seat structure of the Example of this invention, Comprising: A seatable state is shown. It is a partial expanded side view which shows the principal part of the vehicle seat structure of the Example of this invention. It is a side view which shows the vehicle seat structure of the Example of this invention, Comprising: A jumping state is shown. It is a side view which shows the vehicle seat structure of the Example of this invention, Comprising: A fall state is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Floor 25 Seat cushion 26 Seat back 40 Guide groove 42 Slider 43 Link 48 Link connection part 57 Interlocking slide mechanism

Claims (3)

A vehicle seat structure that swings the seat cushion to the seat back side and tilts the seat back forward to bring the seat cushion and the seat back to the floor side,
A bracket for rotatably connecting the seat cushion to the seat back;
A slider provided at a rear portion of the bracket and a guide groove provided in the seat back for slidably supporting the slider are provided, and the seat cushion is provided on the seat back along the height direction of the seat back. It becomes slidable
A link having one side rotatably connected to the slider and the other side rotatably connected to the floor is provided, and the link moves the slider along the guide groove when the seat back is moved forward. A vehicle seat structure. The vehicle seat structure according to claim 1, wherein the link and the bracket are connected to the slider via a common connecting shaft . The vehicle according to claim 1 or 2 , wherein a position of a link connecting portion that connects the link to the floor is set to be lower and front than a position of a seat back connecting portion that connects the seat back to the floor. Sheet structure.

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