JP2019006152A - Vehicle seat - Google Patents

Abstract

To reduce a load applied to a rotary shaft in a rotatable vehicle seat.SOLUTION: A vehicle seat 1 having: a rotary device 3 which is provided on a floor 2 of a vehicle, and so supports a seat body 4 as to be rotatable around a rotation axis A which extends in a substantially vertical direction; and a mobile device 40 which is provided on the floor, and so supports a buckle 31 of a seat belt 25 as to be movable with respect to the floor. The rotary device becomes a lock state for regulating rotation and a lock release state for enabling rotation. The mobile device becomes a lock state for regulating rotation and a lock release state for enabling rotation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat mounted on a vehicle or the like.

  A seat provided on a floor of an automobile so as to be rotatable about an axis extending in a substantially vertical direction is known (for example, Patent Document 1). This seat can realize various seat arrangements suitable for conversations between passengers, breaks, and scenery viewing depending on the rotational position of the seat. When this seat is applied to an autonomous driving vehicle, the driver's seat can take various seat arrangements during automatic driving.

Japanese Patent Laid-Open No. 2006-97780

  When the seat is pivotable, the buckle needs to be movable with respect to the floor so that the seat belt buckle is positioned at an appropriate position according to the seat pivot position even if the seat pivots. There is. As one method for making the buckle movable, there is a method in which a buckle is provided at a rotating portion of the seat and the buckle is rotated integrally with the seat. However, in this method, an inertial force generated in the occupant at the time of a collision is applied to the rotation shaft of the seat through the seat belt and the seat, so it is necessary to increase the rigidity of the rotation shaft, and the size and weight of the seat increase. There is a fear.

  In view of the above background, it is an object of the present invention to reduce a load applied to a rotating shaft in a rotatable vehicle seat.

  In order to solve the above-described problems, one aspect of the present invention is provided on a vehicle floor (2) and supports a seat body (4) so as to be rotatable about a rotation axis (A) extending in a substantially vertical direction. And a rotating device (3) provided on the floor and supporting a buckle (31) of a seat belt (25) so as to be movable with respect to the floor. Is in a locked state that restricts rotation and an unlocked state that enables rotation, and the moving device is in a locked state that restricts movement and an unlocked state that allows movement. A vehicle seat (1) is provided.

  According to this configuration, the inertial force generated in the occupant at the time of a collision or the like is transmitted from the seat belt to the floor via the buckle and the moving device, so that the load applied to the rotating shaft of the rotating device can be reduced. . Further, the position of the buckle can be changed according to the rotation of the seat body. Since the position of the buckle can be fixed, movement when a load is applied can be prevented.

  In the above aspect, the moving device may be in a locked state when the rotating device is in a locked state, and the moving device may be in an unlocked state when the rotating device is in an unlocked state.

  According to this aspect, since the moving device is unlocked when the rotating device is unlocked, the buckle position can be easily changed according to the rotation of the seat body.

  In the above aspect, it is preferable to have a common operation input device (15) for operating the rotating device and the moving device.

  According to this aspect, since both the rotation device and the moving device can be brought into the unlocked state by the operation of the operation input device, the operation becomes easy.

  In the above aspect, the operation input device may be a lever (59) connected to the turning device and the moving device via a control cable (14, 55).

  According to this aspect, both the rotating device and the moving device can be brought into the unlocked state by operating the lever.

  In the above aspect, the moving device may be displaceable with respect to the floor along an arc locus centered on the rotation axis of the rotation device.

  According to this aspect, the buckle can be disposed at an appropriate position according to the rotation of the seat body.

  Further, in the above aspect, the moving device may be provided with respect to the rail (41) provided on the floor, the slider (42) provided to be displaceable on the rail, and attached to the buckle, and the rail. It is good to have a lock member (51) which selectively fixes the slider.

  According to this aspect, the moving device can have a simple structure.

  In the above aspect, the slider may be connected to a portion that rotates integrally with the seat body or the seat body of the turning device.

  According to this aspect, the buckle can be automatically moved following the rotation of the seat body.

  In the above aspect, the slider and the rotation device are connected via a drive device (81), and the drive device has a rotation angle at a predetermined ratio with respect to the rotation angle of the rotation device. Then, the slider may be driven.

  According to this aspect, the buckle can be automatically moved following the rotation of the seat body.

  In the above aspect, the slider may be formed in an arc shape along an arc locus centering on the rotation axis of the rotation device.

  According to this aspect, the engagement range between the slider and the rail can be widened, and the rigidity of the moving device can be increased.

  According to one aspect of the present invention, the buckle is supported by the moving device so as to be movable with respect to the floor. Therefore, the position of the buckle can be changed according to the rotation of the seat body. Since the position of the buckle can be fixed, movement when a load is applied can be prevented.

  In one aspect of the present invention, the seat body is configured such that the moving device is locked when the rotating device is in the locked state, and the moving device is unlocked when the rotating device is in the unlocked state. The buckle position can be easily changed according to the rotation of the.

  In one aspect of the present invention, since the rotation device and the moving device can be brought into the unlocked state by having a common operation input device for operating the rotating device and the moving device, Easy to operate.

  In one embodiment of the present invention, the lever is connected to the rotating device and the moving device via the control cable, so that both the rotating device and the moving device can be unlocked by operating the lever. .

  In one embodiment of the present invention, the moving device can be displaced with respect to the floor along an arc trajectory centered on the rotation axis of the rotation device, so that the buckle is moved according to the rotation of the seat body. It can be placed in an appropriate position.

  In one embodiment of the present invention, when the moving device includes a rail, a slider, and a lock member, the moving device can have a simple structure.

  In one aspect of the present invention, the buckle is automatically moved following the rotation of the seat body by adopting a configuration in which the slider is coupled to the seat body or a portion that rotates integrally with the seat body of the rotation device. Can be made.

  In one aspect of the present invention, a buckle that follows the rotation of the seat body is provided by providing a drive device that drives the slider at a rotation angle at a predetermined ratio with respect to the rotation angle of the rotation device. Can be moved automatically.

  In one embodiment of the present invention, the slider is formed in an arc shape along an arc locus centering on the rotation axis of the rotation device, so that the engagement range between the slider and the rail can be widened. The rigidity of the moving device can be increased.

The perspective view of the vehicle seat which concerns on 1st Embodiment. Cross-sectional view of rotating device Cross section of moving device Explanatory drawing showing the configuration of the vehicle seat The perspective view of the vehicle seat which concerns on 2nd Embodiment. Explanatory drawing which shows the structure of the vehicle seat which concerns on 3rd Embodiment. The perspective view of the vehicle seat which concerns on 4th Embodiment.

  Hereinafter, an embodiment in which a vehicle seat of the present invention is applied to an automobile seat will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the seat 1 includes a turning device 3 provided on the upper surface of the floor 2 of the vehicle, and a seat body 4 provided on the upper portion of the turning device 3. The seat 1 may be any of a driver seat, a passenger seat, and a rear seat. In the present embodiment, the seat 1 is configured as a driver's seat disposed in the right front portion of the passenger compartment.

  As shown in FIGS. 1 and 2, the floor 2 extends in a substantially horizontal direction. The rotation device 3 includes a lower rotation member 6 and an upper rotation member 7 provided on the lower rotation member 6 so as to be rotatable about a rotation axis A extending in a substantially vertical direction. The lower rotating member 6 and the upper rotating member 7 are formed in a plate shape whose surfaces face up and down. The rotation axis A of the rotation device 3 is disposed at the approximate center of the rotation device 3 in plan view. The lower rotating member 6 and the upper rotating member 7 are preferably engaged with each other at their outer peripheral edges so as to be rotatable. The lower rotating member 6 is coupled to the upper surface of the floor 2.

  The rotation device 3 includes a first lock member 11 that restricts the rotation of the upper rotation member 7 relative to the lower rotation member 6. The first lock member 11 is provided on one of the lower rotation member 6 and the upper rotation member 7, and is engaged with the other of the lower rotation member 6 and the upper rotation member 7. And it is possible to displace between the unlocking position away from the other of the upper rotating member 7.

  In the present embodiment, the first lock member 11 having a claw portion at the tip is rotatably provided on the outer peripheral portion of the upper rotation member 7, and the claw portion of the first lock member 11 is provided on the outer peripheral portion of the lower rotation member 6. A locking hole 12 that can be engaged with is provided. When the claw portion of the first lock member 11 enters the locking hole 12, the first lock member 11 restricts the rotation of the upper rotation member 7 relative to the lower rotation member 6.

  The first lock member 11 is urged to the lock position by an urging member (not shown) provided between the first lock member 11 and the upper rotating member 7, and is normally located at the lock position. As shown in FIG. 4, one end of the first control cable 14 is coupled to the first lock member 11. The first control cable 14 is coupled to the first lock member 11 at one end, and is coupled to an operation input device 15 described later at the other end.

  As shown in FIG. 1, the seat body 4 includes a seat cushion 21 that forms a seat that supports the occupant's buttocks and thighs from below, and a seat back 22 that forms a backrest that supports the back of the occupant from behind. Have. The seat cushion 21 and the seat back 22 include a frame that forms a skeleton, a cushion pad supported by the frame, and a skin material that covers the frame and the cushion pad. The lower part of the seat cushion 21 is coupled to the upper part of the upper rotating member 7.

  A belt retractor 24 that winds up the seat belt 25 is provided inside the seat back 22. A belt guide 26 that demarcates the passage of the seat belt 25 is provided at the upper end of the seat back 22. The seat belt 25 extends upward from the belt retractor 24 inside the seat back 22, passes through the belt guide 26, and extends to the front side of the seat belt 25. One end of the seat belt 25 is coupled to a belt anchor 27 coupled to the seat cushion 21. A tongue plate 28 is provided in a portion of the seat belt 25 between the belt guide 26 and the belt anchor 27. The seat belt 25 passes through a through hole formed in the tongue plate 28, and the tongue plate 28 is movable in the longitudinal direction of the seat belt 25. The belt guide 26 and the belt anchor 27 are provided on one side in the width direction with respect to the seat body 4.

  The floor 2 is provided with a moving device 40 that supports the buckle 31 so as to be movable with respect to the floor 2. The buckle 31 has a slot into which the tongue plate 28 is inserted, and is detachably coupled to the tongue plate 28. The buckle 31 and the moving device 40 are disposed on the side opposite to the side on which the belt guide 26 is provided with respect to the seat body 4.

  As shown in FIG. 3, the moving device 40 includes a rail 41 provided on the floor 2 and a slider 42 provided on the rail 41 so as to be displaceable. The rail 41 extends in an arc shape centered on the rotation axis A of the rotation device 3. The slider 42 is supported by the rail 41 so as to be slidable along the longitudinal direction of the rail 41. Therefore, the slider 42 can be displaced with respect to the floor 2 along an arc locus centering on the rotation axis A of the rotation device 3.

  The rail 41 projects to the side closer to each other from the rail lower wall 44 coupled to the floor 2, a pair of rail side walls 45 projecting upward from both side edges of the rail lower wall 44, and the upper ends of the rail side walls 45. And a pair of rail upper walls 46. A slit 47 is formed between the pair of rail upper walls 46.

  The slider 42 passes through the slit 47 and is locked to the edges of the pair of rail upper walls 46. The slider 42 is formed in an arc shape centering on the rotation axis A in a plan view, and can be inserted into a rail 41 similarly formed in an arc shape. The slider 42 is restricted from moving up and down by coming into contact with the rail upper wall 46, and is slidable in the extending direction of the rail 41 by moving in the slit 47.

  The moving device 40 includes a second lock member 51 that selectively fixes the slider 42 to the rail 41. The second lock member 51 is provided on one of the rail 41 and the slider 42, and is between a lock position that engages the other of the rail 41 and the slider 42 and a lock release position that is separated from the other of the rail 41 and the slider 42. Displaceable.

  In the present embodiment, the second lock member 51 provided with the claw portion 51 </ b> A is rotatably provided at a portion protruding from the rail 41 of the slider 42, and the rail side wall 45 can be engaged with the second lock member 51. A hole 52 is provided. When the claw portion 51 </ b> A enters the locking hole 52 at the locked position, the second lock member 51 restricts the rotation of the slider 42 relative to the rail 41.

  The second lock member 51 is urged toward the lock position by an urging member provided between the second lock member 51 and the slider 42, and is normally located at the lock position. As shown in FIG. 4, one end of the second control cable 55 is coupled to the second lock member 51. The second control cable 55 is coupled to the second lock member 51 at one end and is coupled to the operation input device 15 at the other end. In another embodiment, the second lock member 51 may be attached to the inner surface of the rail 41, engage with the slider 42 at the lock position, and separate from the slider 42 at the lock release position.

  As shown in FIG. 1, an upwardly extending arm 57 is provided at a portion of the slider 42 protruding upward from the rail 41, and the buckle 31 is coupled to the tip of the arm 57.

  The operation input device 15 is a member that receives the operation of the occupant, and may be, for example, a pivotable lever or a pullable strap. In the present embodiment, the operation input device 15 is a lever 59 that is rotatably provided on a side portion of the seat cushion 21. The lever 59 is rotatable between an initial position and an operation position, and is biased to the initial position by a biasing member (not shown). When the lever 59 is in the initial position, the first and second control cables 14, 55 are relaxed, and the first and second lock members 11, 51 are in the locked position. On the other hand, when the lever 59 is in the operating position, the first and second control cables 14 and 55 are pulled, and the first and second lock members 11 and 51 are in the unlocked position.

  In the seat 1 configured as described above, in the normal state where the lever 59 is in the initial position, the turning device 3 and the moving device 40 are respectively locked, and the turning of the seat body 4 with respect to the floor 2 and the movement of the buckle 31 are performed. Is regulated. When the movement of the buckle 31 is thus restricted, the movement of the buckle 31 is prevented when a load is applied from the occupant to the seat belt 25 due to a vehicle collision or the like, and the seat belt 25 can appropriately support the occupant. .

  Since the buckle 31 is provided on the floor 2 via the moving device 40 without passing through the shaft portion of the rotating device 3 (the engaging portion of the lower rotating member 6 and the upper rotating member 7), at the time of a collision The inertial force generated in the occupant is transmitted to the floor 2 via the seat belt 25 and the moving device 40, and the load applied to the shaft portion of the rotating device 3 can be suppressed. Thereby, the rigidity required for the rotation device 3 is reduced, and the size and weight of the rotation device 3 can be reduced.

  When the occupant operates the lever 59 from the initial position to the operation position, the rotation device 3 is unlocked, the seat body 4 is rotatable with respect to the floor 2, and the movement device 40 is unlocked. Thus, the buckle 31 can move with respect to the floor 2. In this state, the occupant can turn the seat body 4 to an arbitrary turning position, and can adjust the position of the buckle 31 according to the turning position of the seat body 4.

  Since the occupant can switch both the rotating device 3 and the moving device 40 to the locked state and the unlocked state by operating one lever 59, the position of the buckle 31 according to the rotation of the seat body 4 can be changed. It becomes easy.

  Since the rail 41 that defines the movement path of the slider 42 is formed in an arc shape centered on the rotation axis A of the rotation device 3, the buckle 31 moves along an arc locus centering on the rotation axis A. be able to. Therefore, the buckle 31 can be disposed at an appropriate position according to the rotation of the seat body 4.

(Second Embodiment)
As shown in FIG. 5, the seat 70 according to the second embodiment is integrated with the slider 42 and the seat body 4 or the seat body 4 of the rotating device 3 in addition to the configuration of the seat 1 according to the first embodiment. It has the connection member 71 which connects the part to rotate. Other configurations of the sheet 70 are the same as those of the sheet 1 according to the first embodiment.

  In the sheet 70 according to the second embodiment, the connecting member 71 is coupled to the upper rotating member 7 and the slider 42. When the sheet body 4 is rotated by the connecting member 71, the slider 42 automatically moves according to the rotation of the sheet body 4. This eliminates the need for the occupant to manually adjust the position of the buckle 31 and facilitates the turning operation of the seat body 4.

(Third embodiment)
As shown in FIG. 6, the seat 80 according to the third embodiment includes a drive device that connects the slider 42 and the upper turning member 7 of the turning device 3 in addition to the configuration of the sheet 1 according to the first embodiment. 81 is provided. Other configurations of the sheet 80 are the same as those of the sheet 1 according to the first embodiment.

  In the seat 1 according to the third embodiment, the driving device 81 drives the slider 42 at a rotation angle of a predetermined ratio with respect to the rotation angle of the rotation device 3. The drive device 81 is configured by a gear train, for example. The driving device 81 includes a first gear 82 centered on the rotation axis A formed on the outer peripheral portion of the upper rotation member 7, and a second gear 83 that is rotatably supported by the floor 2 and meshes with the first gear 82. And a third gear 84 that is rotatably supported by the floor 2 and meshes with the second gear 83, and a fourth gear 85 that is formed on the inner peripheral portion of the slider 42 and meshes with the third gear 84. The fourth gear 85 is formed on the inner peripheral side of the arc shape with the rotation axis A as the center. According to this configuration, the buckle 31 can be automatically moved at a predetermined ratio in accordance with the rotation of the seat body 4.

  The drive device 81 may be a link mechanism instead of the gear train.

(Fourth embodiment)
As illustrated in FIG. 7, the seat 90 according to the fourth embodiment includes a slide device 91 between the floor 2 and the rotating device 3 in addition to the configuration of the seat 1 according to the first embodiment. Further, in the seat 90 according to the fourth embodiment, compared to the configuration of the seat 1 according to the first embodiment, the rail 41 of the moving device 40 is replaced with a member on the rotating device 3 side of the slide device 91 instead of the floor 2. Different points are provided. Other configurations of the sheet 90 are the same as those of the sheet 1 according to the first embodiment.

  The slide device 91 is provided on the floor 2 and includes a pair of left and right lower rails 92 extending front and rear, a pair of left and right upper rails 93 slidably provided on each of the lower rails 92, and a base member coupled to the left and right upper rails 93. 94. The base member 94 is formed in a plate shape whose surface is directed vertically, and is coupled to the upper rail 93 on the lower surface and to the lower rotating member 6 on the upper surface. The base member 94 has an extension portion 95 projecting laterally with respect to the lower rotation member 6 on its side portion. A rail 41 of the moving device 40 is coupled to the upper surface of the extension portion 95.

  Since the slide device 91 is provided between the rotation device 3 and the floor 2, the seat body 4 and the buckle 31 can slide with respect to the floor 2. Since both the rotation device 3 and the movement device 40 are provided on the base member 94, the relative position of the rail 41 with respect to the rotation axis A does not change even if the seat body 4 is moved by the slide device 91. Therefore, the buckle 31 can be disposed at an appropriate position according to the rotational position of the seat body 4.

  In the sheet 90 according to the fourth embodiment, a connecting member 71 that connects the upper rotating member 7 and the slider 42 may be provided.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, as a modification of the seat 1 according to the first embodiment, two operation input devices 15 may be provided, and one operation input device 15 may be provided for each of the first and second control cables 14 and 55. If comprised in this way, the rotation apparatus 3 and the moving apparatus 40 can be switched between a locked state and a lock release state mutually independently.

1, 70, 80, 90: Seat 2: Floor 3: Rotating device 4: Seat body 6: Lower rotating member 7: Upper rotating member 11: First lock member 14: First control cable 15: Operation input device 21: Seat cushion 22: Seat back 25: Seat belt 31: Buckle 40: Moving device 41: Rail 42: Slider 51: Second lock member 55: Second control cable 57: Arm 59: Lever 71: Connecting member 81: Drive Device A: Axis of rotation

Claims (9)

A turning device that is provided on the floor of the vehicle and supports the seat body so as to be rotatable about a turning axis extending in a substantially vertical direction;
A moving device provided on the floor and movably supporting a buckle of a seat belt with respect to the floor;
The rotating device is in a locked state that restricts rotation and an unlocked state that enables rotation,
The vehicle seat according to claim 1, wherein the moving device is in a locked state that restricts movement and an unlocked state that enables movement.   The moving device is in a locked state when the rotating device is in a locked state, and the moving device is in an unlocked state when the rotating device is in an unlocked state. Vehicle seat.   The vehicle seat according to claim 1, further comprising a common operation input device for operating the rotating device and the moving device.   The vehicle seat according to claim 3, wherein the operation input device is a lever connected to the turning device and the moving device via a control cable.   The vehicle seat according to claim 4, wherein the moving device is displaceable with respect to the floor along an arc locus centering on the rotation axis of the rotation device.   The moving device includes a rail provided on the floor, a slider provided on the rail so as to be displaceable, to which the buckle is attached, and a lock member that selectively fixes the slider to the rail. The vehicle seat according to claim 5.   The vehicle seat according to claim 6, wherein the slider is connected to a portion that rotates integrally with the seat body or the seat body of the rotating device. The slider and the rotation device are connected via a driving device,
The vehicle seat according to claim 6, wherein the driving device drives the slider at a rotation angle at a predetermined ratio with respect to a rotation angle of the rotation device.   The vehicle seat according to claim 7 or 8, wherein the slider is formed in an arc shape along an arc locus centering on the rotation axis of the rotation device.

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