Movement adjustment system

Abstract

In order to suppress a claustrophobic feeling that a person sitting on a rear seat receives due to a front seat, and to make the front seat easy to use as an ottoman by the person, a movement adjustment system is used for a passenger seat and a rear seat, and includes a slide rail for moving the rear seat in the front to back direction, and a control part for changing the movement region of the rear seat by the slide rail. The passenger seat has a seat cushion, and a seat back mounted to be changeable between an upright state and a lowered state with respect to the seat cushion. The control part changes the movement region so that the passenger seat and the rear seat can come closer when the seat back of the passenger seat is in the lowered state than in the upright state.

Claims

1. A movement adjustment system used for conveyance seats including a front seat and a rear seat, the movement adjustment system comprising: a moving mechanism configured to move at least one of the front seat and the rear seat in a front to back direction; and a movement region change part configured to change a movement region of the at least one of the front seat and the rear seat moved by the moving mechanism, wherein the front seat has a seat cushion, and a seat back mounted to be changeable between an upright state and a lowered state with respect to the seat cushion, and the movement region change part is configured to change the movement region so that the front seat and the rear seat can move closer to one another when the seat back of the front seat is in the lowered state than when the seat back of the front seat is in the upright state.

2. The movement adjustment system according to claim 1, wherein a clearance between the front seat and the rear seat is adjustable between a first clearance which is configured to allow an occupant of the rear seat to put his feet through between the front seat and the rear seat, and a second clearance which is configured to not allow the occupant to put his feet through between the front seat and the rear seat, and only when the seat back of the front seat is in the lowered state, the movement region change part sets the movement region to a range that provides the second clearance.

3. The movement adjustment system according to claim 1, wherein when the front seat and the rear seat are in positions that are close to each other, the moving mechanism moves the front seat or the rear seat so that a relative position of the rear seat to the front seat is higher than when the front seat and the rear seat are in positions that are separated from one another.

4. The movement adjustment system according to claim 1, comprising a detection part configured to detect the lowered state and the upright state of the seat back of the front seat, wherein the movement region change part: determines the lowered state and the upright state of the seat back based on the signal obtained from the detection part, and when the seat back is in the lowered state, changes the movement region so that the front seat and the rear seat can be moved to positions closer to each other than when the seat back is in the upright state.

5. The movement adjustment system according to claim 1, comprising an occupant detection part configured to detect a presence of a sitting person on the front seat, wherein the movement region change part: determines the presence or absence of the sitting person on the front seat based on the signal obtained from the occupant detection part, and when the sitting person is absent, changes the movement region so that the front seat and the rear seat can be moved to positions closer to each other than when the sitting person is present.

6. The movement adjustment system according to claim 1, wherein the front seat and the rear seat form part of a plurality of rows, and of the front seat or the rear seat in one row, to one whose movement region is changed by the movement region change part, a table projecting in front of the rear seat in another row adjacent to the one row is mounted.

7. The movement adjustment system according to claim 1, wherein the front seat and the rear seat form part of a plurality of rows, of the front seat or the rear seat in one row, one whose movement region is changed by the movement region change part has another seat cushion, and another seat back mounted to the other seat cushion, and the other seat back is mounted to the other seat cushion to be rotatable toward another row that is adjacent to the one row.

8. The movement adjustment system according to claim 1, wherein the front seat and the rear seat form part of a plurality of rows, of the front seat or the rear seat in one row, one whose movement region is changed by the movement region change part has another seat cushion, and another seat back mounted to the other seat cushion, the other seat back has edge portions that bulge forward on both sides of the other seat back in a seat width direction, and one of the edge portions, on a side of another row adjacent to the one row, is formed to be more compressively deformable than another of the edge portions, on an opposite side of the other seat back in the seat width direction.

9. The movement adjustment system according to claim 1, wherein the front seat and the rear seat form part of a plurality of rows, the movement region change part changes the movement region of at least one of the front seat and the rear seat in one row so that the front seat and the rear seat can move closer to one another when the seat back of the front seat is in the lowered state than in the upright state, a supply opening of an air-conditioner is arranged on a side, of at least one of the front seat and the rear seat in the one row, that faces another row adjacent to the one row, and air flow is provided obliquely backward from the supply opening toward the rear seat in the other row.

10. The movement adjustment system according to claim 1, wherein the front seat and the rear seat form part of a plurality of rows, the movement region change part changes the movement region of the rear seat in one row so that the front seat and the rear seat can move closer to one another when the seat back of the front seat is in the lowered state than in the upright state, the rear seat in another row adjacent to the one row includes a belt buckle into which a tongue of a seat belt is inserted, and the rear seat in the one row is changed in the movement region by the movement region change part to be movable to the front side in the front to back direction than the belt buckle of the rear seat in the other row when the seat back of the front seat is in the lowered state.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) Various embodiments of the invention are illustrated in the drawings, in which:

(2) FIG. 1 is a perspective view showing a state of the interior of a vehicle including a movement adjustment system according to embodiments of the present disclosure;

(3) FIG. 2A is a side, schematic diagram showing a normal state of the movement adjustment system according to a first embodiment of the present disclosure;

(4) FIG. 2B is a side, schematic diagram showing a state that a left rear seat is brought close to a passenger seat in a state that a seat back of the passenger seat is raised up;

(5) FIG. 2C is a side, schematic diagram showing a state that the left rear seat is brought close to the passenger seat in a state that the seat back of the passenger seat is lowered, and is a view showing a state that a sitting person uses the passenger seat as an ottoman;

(6) FIG. 3 is a side, schematic diagram showing a state that the seat back of the passenger seat is sunk into a seat cushion, and is a view showing the state that the sitting person uses the passenger seat as the ottoman;

(7) FIG. 4 is a top, schematic diagram showing a state that the left rear seat is moved towards the passenger seat side until a belt buckle mounted to a right rear seat is suitably exposed;

(8) FIG. 5 is a top, schematic diagram showing a state that a table for the right rear seat projects from an armrest of the left rear seat;

(9) FIG. 6 is a top, schematic diagram showing an example in which a seat back of the left rear seat is configured to be rotatable;

(10) FIG. 7 is a top, schematic diagram showing a state that an edge portion of the seat back of the left rear seat is compressed;

(11) FIG. 8 is a top, schematic diagram showing a configuration in which supply openings of an air-conditioner are provided in seat backs of a driver seat and the left rear seat;

(12) FIG. 9A is a side, schematic diagram showing, in a first modified example, a state that the left rear seat is brought close to the passenger seat in a configuration where the seat back of the passenger seat is raised up;

(13) FIG. 9B is a side, schematic diagram showing, in the first modified example, a state that the left rear seat is brought close to the passenger seat in a configuration where the seat back of the passenger seat is lowered;

(14) FIG. 10A is a side, schematic diagram showing, in a second modified example, a state that the left rear seat is brought close to the passenger seat in a configuration where the seat back of the passenger seat is raised up;

(15) FIG. 10B is a side, schematic diagram showing, in the second modified example, a state that the left rear seat is brought close to the passenger seat in a state that the seat back of the passenger seat is lowered;

(16) FIG. 11A is a side, schematic diagram showing, in a third modified example, a state that the left rear seat is brought close to the passenger seat in a configuration where the seat back of the passenger seat is raised up;

(17) FIG. 11B is a side, schematic diagram showing, in the third modified example, a state that the left rear seat is brought close to the passenger seat in a configuration where the seat back of the passenger seat is lowered;

(18) FIG. 12 is a top, schematic diagram showing a positional relationship when an adult puts a child in a vehicle; and

(19) FIG. 13 is a top, schematic drawing showing a state where a table provided at a seat back of a driver seat is pulled out.

DETAILED DESCRIPTION

(20) Hereinafter, a movement adjustment system according to embodiments of the present disclosure is described with reference to the drawings. In particular, the movement adjustment system according to the present embodiments is configured to adjust the clearance of seats in two rows, front and rear, provided in a vehicle. It should be noted that the embodiments described below are merely examples to facilitate understanding of the present disclosure, and the present disclosure is not limited thereto. That is, the shape, dimension, arrangement and the like of the members described below can be changed and improved without departing from the gist of the present disclosure, and as a matter of course, the present disclosure includes equivalents thereof.

(21) First Embodiment

(22) With reference to FIG. 1 to FIG. 3, a movement adjustment system S, according to a first embodiment, configured to adjust a seat position by electric control is described. Here, FIG. 1 is a perspective view showing a state of the interior of a vehicle Ca including the movement adjustment system S according to embodiments of the present disclosure. Moreover, FIG. 2A is a side, schematic diagram showing a normal state of the movement adjustment system S according to the first embodiment of the present disclosure, FIG. 2B is a side, schematic diagram showing a state that a left rear seat 4 is brought close to a passenger seat 2 in a state that a seat back 2b of the passenger seat 2 is raised up, and FIG. 2C is a side, schematic diagram showing a state that the left rear seat 4 is brought close to the passenger seat 2 in a state that the seat back 2b of the passenger seat 2 is lowered, and is a view showing a state that a sitting person H uses the passenger seat 2 as an ottoman. Further, FIG. 3 is a side, schematic diagram showing a state that the seat back 2b of the passenger seat 2 is sunk into a seat cushion 2a, and is a view showing the state that the sitting person H uses the passenger seat 2 as the ottoman.

(23) As shown in FIG. 1, the vehicle Ca according to the present embodiment is configured to include a conveyance seat having a driver seat 1, a passenger seat 2, a right rear seat 3 and left rear seat 4, and the movement adjustment system S. In the present embodiment, the row of the driver seat 1 and the right rear seat 3 and the row of the passenger seat 2 and the left rear seat 4 are adjacent rows. Needless to say, the present disclosure is further applicable to a conveyance including seats composed of a plurality of rows.

(24) The passenger seat 2 corresponds to a front seat according to the present disclosure, and mainly includes a seat cushion 2a, and a seat cushion 2b mounted to and configured to be raised up and lowered relative to the seat cushion 2a. In the seat back 2b, on a surface facing the seat cushion 2a when lowered (e.g., in a fall-down state or configuration), a fall-down sensor 2s (described below) is mounted. It should be noted that, as described below, the passenger seat 2 is usable as a footrest for the sitting person H (also called an occupant) sitting on the left rear seat 4. Therefore, a skin having a high water repellency and easy stain resistance (e.g., a skin used for a seat for a two-wheeled vehicle in terms of cleaning properties) is mounted to the seat back 2b of the passenger seat 2, at a position of at least the footrest.

(25) The left rear seat 4 corresponds to a rear seat according to the present disclosure, and mainly includes a seat cushion 4a, and a seat back 4b mounted to a rear end of the seat cushion 4a. The seat cushion 4a is mounted on a slide rail 11 described below, and therefore the left rear seat 4 is configured to be movable back and forth.

(26) As shown in FIG. 2, the movement adjustment system S includes the slide rail 11 as a moving mechanism, a lock member 11c mounted to a lower rail 11a of the slide rail 11, the fall-down sensor 2s, and a control part C for controlling the lock member 11c.

(27) The slide rail 11 includes the lower rail 11a fixed to a floor (not shown) of the vehicle Ca and extending in the front to back direction, and an upper rail 11b mounted to be slidable back and forth with respect to the lower rail 11a.

(28) The lock member 11c corresponds to one of a movement region change part according to the present disclosure, includes a solenoid which, for example, operates electrically and linearly, and, on the front side of the lower rail 11a, is mounted to a position capable of interfering with the upper rail 11b when protruded.

(29) The fall-down sensor 2s is a detection part according to the present disclosure and includes a proximity sensor of induction type, capacitance type, magnetic type or the like, and is mounted to the seat back 2b of the passenger seat 2. The fall-down sensor 2 is configured to detect whether the seat back 2b is lowered (e.g., in the fall-down configuration) and is close to the seat cushion 2a or raised up and to transmit a detection signal to the control part C.

(30) The control part C corresponds to one of the movement region change part according to the present disclosure, and is configured to control a limit of the forward movement of the left rear seat 4 by protruding the lock member 11c from the lower rail 11a when it is in the state shown in FIG. 2A and FIG. 2B. On the other hand, when the seat back 2b is in a lowered state, the control part C controls the lock member 11c to permit the forward movement of the left rear seat 4 by pulling the lock member 11c into the lower rail 11a. The control part C determines these states, that is, whether the seat back 2b is in an upright state or in the lowered state based on the detection signal received from the fall-down sensor 2s.

(31) Specifically, when the seat back 2b is in the upright state shown in FIG. 2A and FIG. 2B, the lock member 11c is controlled by the control part C to protrude from the lower rail 11a, and therefore abuts the upper rail 11b. Therefore, the left rear seat 4 can come close to or be separated from the passenger seat 2 in a range to keep the clearance (also called a first clearance) through which the sitting person H can put his feet (e.g., legroom) by abutment of the lock member 11c to the upper rail 11b. On the other hand, when the seat back 2b is in the lowered state shown in FIG. 2C, the lock member 11c is controlled by the control part C to move into the lower rail 11a, and therefore does not abut the upper rail 11b. Therefore, the left rear seat 4 can come close to the passenger seat 2 until it reaches a clearance (also called a second clearance) into which the sitting person H cannot put his feet, that is, the position where the passenger seat 2 and the left rear seat 4 abut each other in the present embodiment. In other words, when the upright state is changed to the lowered state, the movement region of the left rear seat 4 is expanded to include the range that includes the second clearance in addition to the range that includes the first clearance. It should be noted that the state shown in FIG. 2C and FIG. 3 is a state that the lock member 11c is pulled in the lower rail 11a and the left rear seat 4 is moved forwardly, and thereafter the lock member 11c protrudes and engages with a lock groove 11d by the control of the control part C.

(32) In an embodiment, the seat cushion 2a is configured as shown in FIG. 3. Specifically, the seat cushion 2a includes a cushion part 2d, and side frames 2e formed back and forth on both sides of the seat width direction of the cushion part 2d. Then, the cushion part 2d is configured to be slidable forwardly with respect to the side frames 2e, and the cushion part 2d becomes in a forwardly slid state, thereby the seat back 2b is configured to be capable of sinking downward. By such a configuration, when the seat back 2b is in the lowered state, it is possible to relatively lower the upper surface position of the seat back 2b. Therefore, the sitting person H can put the neighborhood of the back side of the Achilles' tendons of his feet on the seat back 2b, and it allows the sitting posture to be a comfortable posture which hardly gives a burden to his body.

(33) It should be noted that the configuration to thus ease the sitting posture is not limited to deforming the seat cushion 2a side of the passenger seat 2. For example, the slide rail 11 of the left rear seat 4 may be formed obliquely so that the relative position of the left rear seat 4 to the passenger seat 2 is higher, that is, so that the left rear seat 4 is movable obliquely forward.

(34) In addition, the sensor to detect the lowered state of the seat back 2b is not limited to the fall-down sensor 2s including a proximity sensor, and may be a sensor to detect inclination of the seat back 2b, and other sensors may be used to detect the lowered state.

(35) Further, depending on the magnitude of the current load of a motor (not shown) for sliding the passenger seat 2 or the left rear seat 4, the control part C may limit the sliding by stopping the operation of the motor (not shown) if it is determined that the feet of the sitting person H are sandwiched.

(36) Moreover, in a case where a foldable mechanism configured to fold the seat back 2b of the passenger seat 2b from the left rear seat 4 side is included, a sensor to detect the sitting person H not to allow the foldable mechanism to be operated when the sitting person H is on the passenger seat 2 may be provided.

(37) Associated Configuration

(38) With reference to FIG. 4 to FIG. 8, the configuration associated with the movement adjustment system S is described. Here, FIG. 4 is a top, schematic diagram showing a state that the left rear seat 4 is moved towards the passenger seat 2 side until a belt buckle 20 mounted to the right rear seat 3 is suitably exposed, FIG. 5 is a top, schematic diagram showing a state that the table T for the right rear seat 3 projects from an armrest 4g of the left rear seat 4, FIG. 6 is a top, schematic diagram showing an example in which a seat back 4x of the left rear seat 4 is configured to be rotatable, FIG. 7 is a top, schematic diagram showing a state that an edge portion 4h of a seat back 4y of the left rear seat 4 is compressed, and FIG. 8 is a top, schematic diagram showing a configuration in which supply openings 6 of an air-conditioner are provided in the shoulders of the seat backs 1b, 4b of the driver seat 1 and the left rear seat 4.

(39) As shown in FIG. 4, the left rear seat 4 is configured to be movable to the passenger seat 2 side further than the belt buckle 20 so that the belt buckle 20 mounted to the right rear seat 3 is exposed over a wider range. By such a configuration, after putting the child Hb in the right rear seat 3 from the outside of the right rear seat 3, the adult Ha gets into the vehicle from behind the left rear seat 4 in a state that the left rear seat 4 is arranged on the front side (the passenger seat 2 side), thereby it is possible to easily fasten a tongue of a seat belt (not shown) to the belt buckle 20.

(40) Therefore, in rainy weather and the like as shown in FIG. 12 and mentioned above, since the adult Ha inserts the tongue of the seat belt (not shown) in the belt buckle 20 after putting the child Hb in the right rear seat 3 on which a child seat is present, it is not necessary for the adult Ha to remain in the outside of the vehicle in the rain.

(41) Moreover, as shown in FIG. 13 and mentioned above, if the table T1 of the right rear seat 3 as the rear seat is mounted to the seat back 1b of the driver seat 1, the size of the table T1 capable of projecting is limited to the size of the seat back 1b. Therefore, the table T1 was sometimes difficult to use because it was separated too far from the sitting person leaning on the right rear seat 3. As shown in FIG. 5, the table T projects to the right rear seat 3 side in a state that the left rear seat 4 according to the present embodiment is brought close to the passenger seat 2, whereby the above problem is solved.

(42) Specifically, the left rear seat 4 includes, on the side, the armrest 4g in which the folding table T projecting to the right rear seat 3 side is stored. By arranging the left rear seat 4 on the passenger seat 2 side so that the position where the table T projects is in front of the front surface of a seat back 3b by a predetermined distance, the position of the table T can be brought close to the sitting person H on the right rear seat 3 to come close to each other.

(43) In this way, if the table 1 is made to project from the seat in the other row of right and left, the table 1 comes close to the sitting person H and can be made easy to use. Moreover, for example, the table T is provided at the right rear seat 3, and the right rear seat 3 is arranged on the driver seat 1 side, thereafter the table T is made to project to the left rear seat 4 side from the right rear seat 3, and the table T may be used for the sitting person H on the left rear seat 4. Further, the table T is provided at the passenger seat 2, and the passenger seat 2 is arranged on the left rear seat 4 side, thereafter the table T is made to project to the right rear seat 3 side from the passenger seat 2, and the table T may be used for the sitting person H on the right rear seat 3.

(44) In addition, if a cup holder (not shown) is mounted to the armrest 4g, in a case where the cup holder 4g is used with the table T at meals, compared to the cup holder mounted on the door side, the food placed on the table T and the drink held in the cup holder can be arranged closely, and therefore convenience thereof can be increased. Further, since the table T is mounted to the armrest 4g, the table T is not necessary to mount to a center console (not shown), and the center console can be detached from the left rear seat 4 moving back and forth and fixed to the floor (not shown). The fact that the center console can be fixed to the floor in this way is preferable from the viewpoint of stable supply of electricity to a refrigerator when the center console includes the refrigerator.

(45) Moreover, as shown in FIG. 6, in a state that the left rear seat 4 is brought close to the passenger seat 2 side, the seat back 4x as another seat back in the left rear seat 4 may be configured to be rotatable to the right rear seat 3 side.

(46) Such a configuration is not limited to the seat back 4x of the left rear seat 4, the seat back 3b of the right rear seat 3 may be inclined to the left rear seat 4 side when brought close to the driver seat 1, and the seat back 2b of the passenger seat 2 may be rotated to the driver seat 1 side when brought close to the left rear seat 4. In this way, the sitting persons H in the right and left rows are able to easily communicate, and assisting, caring and the like for one sitting person H are facilitated.

(47) In addition, a means for facilitating assisting, caring and the like of the sitting persons H in the right and left rows is not limited to the above configuration, and, for example, as shown in FIG. 7, an edge portion 4h as an edge portion bulging in front of the seat back 4y of the left rear seat 4 may be formed to be easily hollowed (to be compressively deformable) than other portions.

(48) As thus described, by forming the edge portion 4h to be easily hollowed, the upper half of the body of the sitting person H can be leaned forward on the right rear seat 3 side or twisted to face the right rear seat 3 side in such a manner that the edge portion 4h is compressed. Therefore, in a case where the sitting persons H are in the right rear seat 3 and the left rear seat 4 respectively, the sitting person H on one of the right rear seat 3 or the left rear seat 4 easily assists and cares for the sitting person H on the other seat. In addition, for the passenger seat 2 or the right rear seat 3, and further for the edge portion of the driver seat 1, a low-strength material easy to compress may be used. Then, one or both of the configuration in which the seat back 4x is made to be rotatable and the configuration in which the edge portion 4h is made to be easily hollowed may be adopted to any seat.

(49) Moreover, as shown in FIG. 8, the supply openings 6 of the air-conditioner may be provided in the shoulder on the left side of the seat back 1b of the driver seat 1 and in the shoulder on the right side of the seat back 4b of the left rear seat 4. In this way, when the left rear seat 4 is arranged on the passenger seat 2 side, the air flow from the supply opening 6 provided in the shoulder of the seat back 1b of the driver seat 1 can be directed to the left rear seat 4 side. Further, in this arrangement, the air flow from the supply opening 6 provided in the shoulder of the seat back 4b of the left rear seat 4 can be directed to the right rear seat 3 side. Therefore, deviation in temperature control in the vicinity of each of the driver seat 1, the passenger seat 2, the right rear seat 3, and the left rear seat 4 can be suppressed.

(50) First Modified Example

(51) With reference to FIG. 9, a movement adjustment system Sa according to a first modified example for mechanically performing adjustment of the seat position is described. Here, FIG. 9A is a side, schematic diagram showing a state that the left rear seat 4 is brought close to the passenger seat 2 in a configuration where the seat back 2 of the passenger seat 2 is raised up, and FIG. 9B is a side, schematic diagram showing a state that the left rear seat 4 is brought close to the passenger seat 2 in a configuration where the seat back 2b of the passenger seat 2 is lowered. It should be noted that, in the description below, the members having the same shape and structure are referred to by the same reference numerals, a description thereof is omitted, and the differences from the members having different shapes and structures are clarified.

(52) As shown in FIG. 9A, the seat back 2b has a rotary shaft 2g which is the center of rotation when the seat back 2b is switched between the lowered state and the upright state, and is formed with an extension part 2f that extends downwardly further than the rotary shaft 2g in the upright state of the seat back 2b. Moreover, in the lower portion of the seat cushion 4a, the slide rail 11 is mounted.

(53) The lock groove 11d is formed in a position facing the lock member 11c in a state that the seat cushion 2a of the passenger seat 2 and the seat cushion 4a of the left rear seat 4 are abutted.

(54) The extension part 2f corresponds to one of the movement region change part according to the present disclosure, and as shown in FIG. 9A, is provided in the lower portion of the rotary shaft 2g and in front of the seat cushion 4a in a case where the seat back 2b is in the upright state. Moreover, by the rotation of the seat back 2b around the rotary shaft 2g, as shown in FIG. 9B, in a case where the seat back 2b is in the lowered state, the extension part 2f is moved to a position which is in the upper portion of the rotary shaft 2g and does not interfere with a front of the seat cushion 4a.

(55) Therefore, in a case where the seat back 2b is in the upright state, the extension part 2f limits the forward movement of the left rear seat 4 by abutting the seat cushion 4a of the left rear seat 4. On the other hand, in a case where the seat back 2b is in the lowered state, the extension part 2f is in a position above the seat cushion 4a of the left rear seat 4, and permits the further forward movement of the left rear seat 4 by not interfering with the movement.

(56) Then, in a case the seat back 2b is in the lowered state, when the seat cushion 4a abuts the passenger seat 2, the lock groove 11d is in a position facing the lock member 11c. Therefore, by locking the lock member 11c in the lock groove 11d and fixing the position of the left rear seat 4, the passenger seat 2 can be suitably used as an ottoman.

(57) The extension part 2f may be in a position capable of abutting on the seat cushion 4a in the upright state of the seat back 2b, and may be formed at at least a part of the seat width direction. By such a configuration, while enabling the sitting person H on the left rear seat 4 to put his feet through between the passenger seat 2 and the left rear seat 4 in the portion not formed with the extension part 2f, the forward movement of the left rear seat 4 can be limited.

(58) Second Modified Example

(59) In the movement adjustment system Sa according to the first modified example, the slidable positions of the left rear seat 4 in the upright state and the lowered state of the seat back 2b are changed by the extension part 2f, but the present disclosure is not limited to such a configuration. With reference to FIG. 10, a movement adjustment system Sb according to a second modified example for mechanically performing adjustment of the seat position is described. FIG. 10A is a side, schematic diagram showing a state that the left rear seat 4 is brought close to the passenger seat 2 in a configuration where the seat back 2b of the passenger 2 seat is raised up, and FIG. 10B is a side, schematic diagram showing a state that the left rear seat 4 is brought close to the passenger seat 2 in a configuration where the seat back 2b of the passenger seat 2 is lowered.

(60) The movement adjustment system Sb according to the present example is characterized by including a front rod 7 provided in the lower portion of the seat cushion 2a, a compression spring 8 for biasing the front rod 7 to the rear of the vehicle, a rear rod 4c, and a stopper 9 mounted to the seat back 2b.

(61) The front rod 7 is arranged to extend in the front to back direction on a straight line in front of the rear rod 4c, and is biased to the rear of the vehicle by the compression spring 8. In particular, in the top surface on the rear side of the front rod 7, a locking groove 7a locked with the stopper 9 (described below) is formed. The stopper 9 corresponds to one of the movement region change part according to the present disclosure, is made of a substantially S-shaped bar, and is mounted to the outside of the seat back 2b in the seat width direction. In the upright state of the seat back 2b, the stopper 9 is arranged to be lockable to the locking groove 7a formed in the front rod 7.

(62) The operation of the movement adjustment system Sb according to the above configuration is now described. As shown in FIG. 10A, when the seat back 2b is in the upright state, the stopper 9 fixes the position of the front rod 7 located in the rear thereof by being locked in the locking groove 7a. Thereby, the movement of the left rear seat 4 fixed to the rear rod 4c is limited to a position where the rear rod 4c abuts the front rod 7, and the clearance between the passenger seat 2 and the left rear seat 4 is kept to the clearance in which the sitting person H can put his feet.

(63) On the other hand, as shown in FIG. 10B, when the seat back 2b is in the lowered state, the stopper 9 also rotates around the rotary shaft 2g in association with the rotation of the seat back 2b around the rotary shaft 2g from the upright state to the lowered state. Thereby, locking of the stopper 9 into the locking groove 7a is released, and the front rod 7 can be moved back and forth. Further, a force against the bias of the compression spring 8 in a state that the rear rod 4c abuts the front rod 7 is applied to the left rear seat 4, thereby the left rear seat 4 can be moved forwardly to a position where it abuts the passenger seat 2. Then, when the seat cushion 4a abuts the passenger seat 2, the lock groove 11d is in a position facing the lock member 11c. Therefore, the position of the left rear seat 4 is fixed by locking the lock member 11c in the lock groove 11d, thereby the passenger seat 2 can be suitably used as an ottoman.

(64) According to the configuration according to the present example, when the seat back 2b is in the upright state, a space for putting one's feet in can be secured between the passenger seat 2 and the left rear seat 4 by the stopper 9.

(65) It should be noted that, FIG. 10 is an image view for facilitating the understanding, and in this figure, the stopper 9 is shown to be arranged at the height same as or higher than the seat cushion 2a, but in other embodiments, is arranged in the lower portion of the seat cushion 2a.

(66) Third Modified Example

(67) With reference to FIG. 11, a movement adjustment system Sc according to a third modified example for mechanically performing adjustment of the seat position is described. FIG. 11A is a side, schematic diagram showing a state that the left rear seat 4 is brought close to the passenger seat 2 in a configuration where the seat back 2b of the passenger seat 2 is raised up, and FIG. 11B is a side, schematic diagram showing a state that the left rear seat 4 is brought close to the passenger seat 2 in a configuration where the seat back 2b of the passenger seat 2 is lowered.

(68) The movement adjustment system Sc according to the present example includes a front rod 7x provided in the lower portion of the seat cushion 2a, the rear rod 4c, and a link 10 mounted to the seat cushion 2a.

(69) The front rod 7x is arranged to extend in the front to back direction on a straight line in front of the rear rod 4c. In particular, on the rear side of the front rod 7x, a lower end portion 10a of the link 10 (described below) is connected.

(70) The link 10 corresponds to one of the movement region change part according to the present disclosure, and the lower end portion 10a thereof and the upper end portion 10b thereof are mounted rotatably to the rear side of the front rod 7x and the lower side of the seat back 2b, respectively. Moreover, as shown in FIG. 11A, when the seat back 2b is in the upright state, the link 10 is mounted at an upper end portion 10b thereof in a portion of the seat back 2b that is lower than the rotary shaft 2g, and is arranged to extend obliquely forward from the lower end portion 10a to the upper end portion 10b. Then, the seat back 2b is changed from the upright state to the lowered state shown in FIG. 11B, and along with this, the upper end portion 10b is moved to be located along a horizontal plane of the rotary shaft 2g of the seat back 2b, and the lower end portion 10a is moved forwardly.

(71) As described above, depending on the state of the seat back 2b, the position of the lower end portion 10a is changed, and along with this, the position of the front rod 7x connected to the lower end portion 10a is changed. That is, when the seat back 2b is in the upright state shown in FIG. 11A, the upper end portion 10b is in the lower position, and therefore, the lower end portion 10a of the link 10 projects backwardly, and the front rod 7x is moved backwardly. Therefore, the sliding range of the left rear seat 4 is limited to a position where the rear rod 4c abuts the front rod 7x moved backwardly. On the other hand, when the seat back 2b is in the lowered state shown in FIG. 11B, the upper end portion 10b is in the upper position, and therefore, the lower end portion 10a of the link 10 is pulled forwardly, and the front rod 7x is moved forwardly. Therefore, the sliding range of the left rear seat 4 is expanded forwardly to a position where the rear rod 4c abuts the front rod 7x moved forwardly.

(72) According to the configuration according to the present example, when the seat back 2b is in the upright state, a space for putting one's feet in can be secured between the passenger seat 2 and the left rear seat 4 by the link 10. Moreover, even without using the compression spring 8, the front rod 7x can be moved back and forth, and therefore, the number of parts can be reduced, and in the lowered state of the passenger seat 2, a force against the biasing force of the compression spring 8 is not required when moving the left rear seat 4.

(73) It should be noted that, FIG. 11 is an image view for facilitating the understanding, and in this figure, the link 10 is shown to be arranged at a same height as or higher than the seat cushion 2a, but in other embodiments, is arranged in the lower portion of the seat cushion 2a.

(74) In the above embodiments, although the right rear seat 3 and the left rear seat 4 are described as being separately formed, the present disclosure may be applied to a bench type seat in which both seats are integrally formed. Moreover, in the above embodiments, although the configuration for sliding the left rear seat 4 is described when explaining the relationship between the passenger seat 2 and the left rear seat 4 which come close to each other or are separated from one another, the present disclosure is not limited to such a configuration as long as the clearance between the front and rear seats can be adjusted. For example, another embodiment provides a configuration for sliding the passenger seat 2 instead of the left rear seat 4.

(75) Moreover, by having a square cross-section, the lock member 11c is preferable because it can limit the movement by coming into surface contact with the upper rail 11b. However, the lock member 11c is not limited to such a shape as long as it can limit the movement of the upper rail 11b.

(76) Further, when a signal is received, indicating that the presence or the absence of the sitting person on the front seat has been detected by a proximity sensor, a camera or the like (not shown) (e.g., by another detection part), the control part C may, for example, limit the sliding amount (change the movement region) of the rear seat. More specifically, the control part C may change the movement region of the rear seat so that the rear seat can be moved to a position close to the front seat when the sitting person is absent than when the sitting person is present.

(77) Further, although the seats in two rows of front and rear are described, the present disclosure can be applied to a vehicle having seats in three rows of front and rear, for example, as long as it can adjust the front and rear clearance of the seats.

TABLE OF REFERENCE NUMERALS

(78) 1: Driver seat (Conveyance seat) 1b: Seat back 2: Passenger seat (Front seat, Conveyance seat) 2a: Seat Cushion 2b: Seat back 2d: Cushion part 2e: Side frame 2f: Extension part (Movement region change part) 2g: Rotary shaft 2s: Fall-down sensor (Detection part) 3: Right rear seat (Conveyance seat) 3b: Seat back 4: Left rear seat (Rear seat, Conveyance seat) 4a: Seat cushion 4b: Seat back 4c: Rear rod 4g: Armrest 4h: Edge portion (edge portion) 4x, 4y: Seat back (Another seat back) 6: Supply opening 7, 7x: Front rod 7a: Locking groove (Movement region change part) 8: Compression spring 9: Stopper (Movement region change part) 10: Link (Movement region change part) 10a: Lower end portion 10b: Upper end portion 11: Slide rail (Moving mechanism) 11a: Lower rail 11b: Upper rail 11c: Lock member (Movement region change part) 11d: Lock groove 20: Belt buckle C; Control part (Movement region change part) Ca, C1a: Vehicle H: Sitting person (Occupant) Ha: Adult Hb: Child S, Sa, Sb, Sc: Movement adjustment system T, T1: Table