JP6199208B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat. Specifically, the present invention relates to a vehicle seat that allows a seated person to easily adjust the posture.

  Conventionally, it has been attempted to develop a vehicle seat that can appropriately support a seated person. For example, the technology described in Patent Document 1 is a technology that attempts to suppress the accumulation of fatigue by appropriately supporting a seated person. More specifically, by adjusting the position that supports the back and buttocks of the seat occupant, the curve formed by the spinal cord has a predetermined shape and is designed to suppress the occurrence of seat occupant fatigue. is there.

JP-A-6-72208

  By the way, most vehicles are not only going straight, but are able to move in a curved line. That is, the centrifugal force can be applied to the seated person while the vehicle is moving. For example, when a seated person in a left turn is viewed from the back side, the user tries to move the body from the state schematically illustrated by the solid line in FIG. 9 to the state schematically illustrated by the broken line. In other words, by bending the spine, one shoulder and the buttocks approach relatively, and the other shoulder and the buttocks move relatively apart. The present inventor has found that it is possible to suppress the burden on the seated person by supporting the seated person's back while facilitating such movement. It has also been found that the accumulation of fatigue of the seated person can be reduced by making the movement easy.

  The present invention has been made in view of the above-described points, and the problem to be solved by the present invention is to provide a vehicle seat in which a seated person can easily bend.

In order to solve the above problems, the present invention takes the following means. A first invention is a vehicle seat including a seat back that can support a back of a seated person and a seat cushion that can support a thigh of the seated person, and the seat back is a first pressure receiving surface. And a second pressure receiving surface positioned below the first pressure receiving surface, and the first pressure receiving surface and the second pressure receiving surface rotate around a rotation shaft extending in the front-rear direction. It is possible to move . The first pressure receiving surface that receives the load of the seat occupant is located on the left side from the center position in the seat width direction that is disposed in a state where the load of the seat occupant is not received, with the first rotation axis as the center. The second pressure-receiving surface that receives a load on the seat occupant is centered about the second rotation axis and can be rotated so as to gradually draw an arc upward as it goes to the right. The second pressure-receiving surface and the second pressure-receiving surface are rotatable so as to gradually draw an upward arc from the center position in the seat width direction arranged without receiving a load toward the left or right. The second pressure receiving surface is configured such that the vertical distance between the second rotational shaft is longer than the vertical distance between the first pressure receiving surface and the first rotational shaft. Is configured so that the distance that can be moved in the left-right direction is larger than that of the first pressure-receiving surface. And wherein the are.

  According to the first aspect, since the seated person can easily take a posture of bending in the left-right direction, the burden on the seated person can be suppressed. Further, since the blood flow can be promoted by taking a posture in which the seated person bends in the left-right direction, accumulation of fatigue can be suppressed.

In a second aspect based on the first aspect, the seat back includes a base, and includes a first support member including the first pressure receiving surface and a second support member including the second pressure receiving surface. Is attached to the base so as to be rotatable , and the first support member and the second support member are a shaft member constituting a corresponding rotation shaft and a corresponding rotation. It is supported by the said base via the corresponding load receiving member each provided in the right side and the left side of the axis | shaft .

  According to the second invention, since the pressure receiving surface is configured to be rotatable by attaching the support member to the base, the structure that allows the seated person to bend in the left-right direction is relatively simple. Can be formed.

According to a third invention, in the first or second invention, the seat back includes a base, and a second support member includes the first support member including the first pressure receiving surface and the second pressure receiving surface. The support member is rotatably attached to the base, and the base is fixed between the pair of left and right side frames extending in the vertical direction and the pair of side frames and extends in the left and right direction. And a separate spanning portion that is mounted so as to be movable in the vertical direction with respect to the spanning portion, and the other spanning portion includes the first support. A member and the second support member are attached .

According to the third aspect of the invention, the vertical position of another span is adjusted, and the first support member and the second support member are arranged at an appropriate height position according to the physique of the seated person. be able to.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the pressure-receiving surface of the seat cushion includes a portion that can move in the left-right direction.

According to the fourth aspect of the invention, the seated person's buttocks can be moved in the left-right direction, and it can be more easily bent in the left-right direction. Therefore, it may be possible to more effectively suppress the accumulation of fatigue.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to set it as the vehicle seat which a seated person tends to bend.

1 is a perspective view of a vehicle seat to which the present invention is applied. 1 is a side view of a vehicle seat to which the present invention is applied. It is the perspective view which looked at the principal part of the internal structure of the seat back of this invention from the front side. It is the perspective view which looked at the principal part of the internal structure of the seat back of this invention from the back side. It is the figure which looked at the principal part of the internal structure of the seat back in the normal time from the front. It is the figure which looked at the principal part of the internal structure of the seat back at the time of left turn from the front. It is the figure seen from the side which shows the principal part of the internal structure of the seat back of this invention. It is the elements on larger scale of the VIII-VIII cross section of FIG. It is a figure which shows the state which looked at the attitude | position change which a seated person shows at the time of left turn from the back surface. It is a figure which shows the state which looked at the attitude | position change which a seated person shows at the time of left turn from upper direction.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate. Note that in the present specification, directions such as the front-rear direction, the up-down direction, and the left-right direction are defined as X in the front direction, Y in the left direction, and Z in the up direction shown in FIGS. For example, normally, when the seated person P is seated, the field of view is the front, and the occipital side that does not enter the field of view is the rear. In the present specification, the description will be made on the assumption that the seated person P can bring his back into contact with the seat back 2 as shown in FIG.

  The vehicle seat 1 in the present embodiment is applied to a front seat, and is particularly used as a driver seat. The vehicle seat 1 generally includes a seat back 2, a headrest 4, and a seat cushion 3. The seat back 2 is provided with a pressure receiving surface capable of receiving a load transmitted mainly through the back of the seated person P, and is attached to the seat cushion 3 so that the inclination can be adjusted. Yes. The headrest 4 is mainly opposed to the head of the seated person P and includes a pressure receiving surface capable of receiving a load from the head as necessary. The seat cushion 3 includes a pressure receiving surface capable of receiving a load transmitted mainly through the thigh of the seated person P, and the pressure receiving surface is substantially parallel to the floor surface of the vehicle. Is provided. In addition, in the seat cushion 3 of this Embodiment, it is comprised so that a part of pressure receiving surface provided in the seat cushion 3 can rock | fluctuate in the left-right direction.

  In the present embodiment, the first pressure receiving surface 61 where the pressure receiving surface of the seat back 2 is located above the seat back 2, and the second pressure receiving surface 62 located below the first pressure receiving surface 61, It has. The first pressure-receiving surface 61 can be positioned at a height opposite the standard driver's scapula, and the second pressure-receiving surface 62 faces a portion of the standard driver's lumbar spine. It is located at the height to be. That is, the first pressure receiving surface 61 can receive a load applied from the vicinity of the rib, and the second pressure receiving surface 62 can receive a load applied from the vicinity of the waist.

  The first pressure receiving surface 61 and the second pressure receiving surface 62 are configured to be able to move along with the bending operation when the seated person P bends the back in the left-right direction. More specifically, the first pressure receiving surface 61 and the second pressure receiving surface 62 are configured to be rotatable. The first pressure receiving surface 61 and the second pressure receiving surface 62 are arranged so as to be substantially parallel in the vertical direction. For example, when the back of the seated person P is bent so that the left shoulder is lower than the right shoulder, The rotation direction of one pressure receiving surface 61 and the rotation direction of the second pressure receiving surface 62 can be reversed.

  The first pressure receiving surface 61 is rotatable about a first rotation axis R1 extending in the front-rear direction, and the second pressure receiving surface 62 is centered on a second rotation axis R2 extending in the front-rear direction. It can be turned. Further, the entire first pressure receiving surface 61 and the entire second pressure receiving surface 62 are rotatable so as to draw an arc. Accordingly, the portion of the first pressure receiving surface 61 that is in contact with the seated person P rotates while moving slightly in the vertical direction. Further, the second pressure receiving surface 62 is configured to have a greater distance that can be moved in the left-right direction than the first pressure receiving surface 61.

  Next, the internal structure of the vehicle seat 1 of the present embodiment will be described in detail with a focus on the seat back 2. The seat back 2 of the vehicle seat 1 of the present embodiment includes a side frame 21 extending in the vertical direction on both the left and right sides, and an upper frame 22 that connects the upper portions of the side frames 21 (see FIGS. 3, 4 and 5). ). A holder 23 capable of holding a headrest support 70 is fixed to the upper frame 22, and the headrest 4 can be connected to the seat back 2.

A first span 25 corresponding to the span of the present invention is spanned and fixed to the two side frames 21, and the side frame 21, the upper frame 22, and the first span 25 are It is comprised so that a substantially rectangular shape may be formed. A second span 26 is spanned between the two side frames 21, and the second span 26 is a predetermined span between the first span 25 and the upper frame 22. The vertical position can be adjusted and fixed within the range. A third span 27 corresponding to another span of the present invention is spanned between the first span 25 and the second span 26. The third span 27 is connected to the second span 26 and is configured such that when the second span 26 is moved, the third span 27 is also moved. . More specifically, the adjustment bar 76 is moved up and down by turning the height adjustment screw 75 to move the second extension part 26 and the third extension part 27 along the guide bar 77. It can be moved up and down. In the present embodiment, the base is constituted by the side frame 21, the upper frame 22, the first span 25, the second span 26, and the third span 27. A first support member 8 and a second support member 9 are rotatably attached to the base (see FIG. 6).

  Two through holes of a cylindrical bush 72 are attached to the third spanning portion 27 so as to face in the front-rear direction, and each bush 72 has a shaft member that can rotate along its inner peripheral surface. 73 is fitted (see FIGS. 3 to 7). The bush 72 is attached in parallel in the vertical direction, and the first support member 8 including the first pressure receiving surface 61 is attached to the front side of the shaft member 73 fitted in the bush 72 positioned on the upper side. . Since the first support member 8 is rotatable about the first rotation axis R1 which is also the central axis of the shaft member 73, the first pressure receiving surface 61 is also the first rotation axis R1. It can be rotated around the center. A second support member 9 having a second pressure receiving surface 62 is attached to the front side of the shaft member 73 fitted in the bush 72 located on the lower side. Since the second support member 9 is rotatable about the second rotation axis R2 that is also the central axis of the shaft member 73, the second pressure receiving surface 62 is also configured to be the second rotation axis R2. It can be rotated around the center.

  The bush 72 is arranged so as to be positioned approximately in the middle between the side frame 21 and the side frame 21, so that the rotation shaft is positioned on the center line C of the seat back 2. Further, the bush 72 of the second support member 9 is configured to be able to overlap with the swing axis S that is an axis when the swinging portion provided in the seat cushion 3 swings.

  The third span 27 is provided with a first load receiving member 51 so as to receive a load transmitted from the seated person P to the first support member 8. The load receiving member is a right first load receiving member 511 capable of receiving a load at a position on the right side of the center line C, and a left first load receiving member capable of receiving a load at a position on the left side of the center line C. The member 512 is provided. The first support member 8, the right first load receiving member 511, and the left first load receiving member 512 are arranged so as to form an isosceles triangle when they are connected by a straight line. By arranging in this way, it becomes possible to receive loads at three locations of the first support member 8, the right first load receiving member 511 and the left first load receiving member 512, and resistance required for each member. It is possible to suppress the load value. Moreover, since support by three points becomes possible, it becomes possible to receive the load from the seated person P stably.

  The third span 27 is provided with a second load receiving member 52 so as to receive a load transmitted from the seated person P to the second support member 9. The load receiving member is a right second load receiving member 521 that can receive a load at a position on the right side of the center line C, and a left second load receiving member that can receive a load at a position on the left side of the center line C. Member 522. The second support member 9, the right second load receiving member 521, and the left second load receiving member 522 are configured to form an isosceles triangle by connecting them with a straight line. By arranging in this way, it becomes possible to receive loads at three locations of the first support member 8, the right second load receiving member 521, and the left second load receiving member 522, and resistance required for each member. It is possible to suppress the load value. Moreover, since support by three points becomes possible, it becomes possible to receive the load from the seated person P stably.

  Each of the right first load receiving member 511, the right second load receiving member 521, the left first load receiving member 512, and the left second load receiving member 522 can rotate the rotatable receiving member 58 and the rotating receiving member 58. A rotation support bar 59 is provided to support (see FIG. 8). The rotation support bar 59 is attached to the third span 27 via a bracket 57 that is L-shaped in cross section, and the columnar rotation receiving member 58 can rotate along the outer periphery of the rotation support bar 59. It is configured as follows. The rotation receiving member 58 is configured to be able to abut against the adjacent first support member 8 or second support member 9, and the first support member 8 and the second support member 8 are loaded by a load from the seated person P. When the support member 9 is about to rotate, the rotation receiving member 58 can be rotated.

  The first support member 8 is provided with a right first restriction member 81 capable of restricting the rotation range of the first support member 8 by colliding with the right first load receiving member 511. Yes. The right first restricting member 81 is provided so as to protrude to the rear side of the first support member 8, and is attached so as to sandwich the right first load receiving member 511 by a concave portion when viewed in cross section. Similarly, the first support member 8 is provided with a left first restriction member 82 capable of restricting the rotation range of the first support member 8 by colliding with the left first load receiving member 512. Yes. In the present embodiment, the rotation range of the first support member 8 is restricted so that the first support member 8 can be rotated from the normal state to the right and the left by 10 degrees.

  The second support member 9 is provided with a second restricting member 83 that can restrict the rotation range of the second support member 9 by colliding with the right second load receiving member 521. . The second restricting member 83 can restrict the rotation range of the second support member 9 by colliding with the second load receiving member 522 on the left side. The second regulating member 83 is provided so as to protrude to the rear side of the second support member 9, and the right side second load receiving member 521 and the left side second load receiving member are formed by two concave portions in cross section. It is attached so as to sandwich 522. In the present embodiment, the rotation range of the second support member 9 is restricted so that it can be rotated up to 10 degrees in the right direction and the left direction from the normal state. However, when comparing the distance between the first pressure receiving surface 61 and its rotating shaft and the distance between the second pressure receiving surface 62 and its rotating shaft, the latter distance is increased. The second pressure receiving surface 62 is configured to swing more in the left-right direction than the pressure receiving surface 61. Although the first support member 8 and the second support member 9 rotate together, the first support member 8 and the second support member 9 are arranged so as to be appropriately spaced from each other and interfere with each other. It is configured not to.

  The first support member 8 and the second support member 9 are formed in a substantially concave shape so that the left and right ends of the plate-like member are positioned forward from the center. That is, the first pressure receiving surface 61 and the second pressure receiving surface 62 are formed in a substantially concave shape. Therefore, the structure is easy to receive a load that is applied to the first support member 8 and the second support member 9 to move in the left-right direction. That is, the first support member 8 and the second support member 9 are easily rotated by receiving a load applied from the seated person P.

  Each of the first support member 8 and the second support member 9 is provided with a pad member (not shown) or a skin member (not shown) so as to cover the front side thereof, and has an appropriate support force. It is possible to support the seated person P while generating. The first support member 8 having a cushioning function such as a pad member or a skin member is a first rotation member, and is configured such that the surface of the first rotation member and the seated person P can come into contact with each other. Similarly, the second support member 9 having a cushioning function such as a pad member or a skin member is a second rotation member, and is configured so that the surface of the second rotation member and the seated person P can come into contact with each other. ing.

  The seat cushion 3 is configured to behave differently on the front side and the rear side. A portion on the front end side of the seat cushion 3 is configured so as not to move in the left-right direction, and a portion that supports the buttocks or the like is configured to be movable in the left-right direction. In particular, the center of a swing shaft member (not shown) provided at a portion that cannot move in the left-right direction is configured to be swingable with the swing shaft S as the center. Therefore, as shown in FIG. 9, it can be even easier to move the body of the seated person P.

  When the vehicle seat 1 of the present embodiment is used as a driver's seat, the first pressure receiving surface 61 can receive a load transmitted from the vicinity of the rib portion of a standard body-type seated person P, and the handle. The first pressure receiving surface 61 can be rotated in accordance with the operation of turning. Therefore, for example, when trying to turn left, the first pressure receiving surface 61 can be rotated in conjunction with an operation of turning the handle so that the right hand moves upward and the left hand moves downward. In particular, it becomes easy to perform the operation without substantially changing the center position of the ribs.

  On the other hand, the second pressure receiving surface 62 can receive a load transmitted from the vicinity of the pelvis of a standard body occupant P and can rotate to the opposite side to the first pressure receiving surface 61. It is a thing. Therefore, it is possible to smoothly bend the lumbar vertebra in the left-right direction. In particular, since the second pressure receiving surface 62 is configured so that the amount of displacement in the left-right direction is greater than that of the first pressure receiving surface 61, the posture of the seated person P can be bent in the left-right direction. More effective. In the above description, left turn is illustrated, but when turning right, the turning directions of the first pressure receiving surface 61 and the second pressure receiving surface 62 are opposite to those when turning left. It will be.

  Moreover, since the part located in the seat cushion 3 near the buttocks of the seated person P is movable so as to swing in the left-right direction, the seated person P can more easily bend the body in the left-right direction. . In particular, since the swing axis S of the seat cushion 3 extends so as to be located upward as it goes rearward, it is easy to provide a left-right difference in the height of the buttocks when the buttocks of the seated person P move in the left-right direction. Become. Therefore, the body of the seated person P can be bent further in the left-right direction.

  In addition, the seat cushion 3 of the present embodiment is configured so that the front portion does not swing left and right. Therefore, it is possible to suppress the vicinity of the knee from moving to the left and right while moving the vicinity of the buttocks of the thigh to the left and right.

  In the vehicle seat 1 according to the present embodiment, the seat back 2 includes a first pressure receiving surface 61 and a second pressure receiving surface 62 positioned below the first pressure receiving surface 61. Since the first pressure receiving surface 61 and the second pressure receiving surface 62 can be rotated around a rotation axis extending in the front-rear direction, the seated person P can easily bend in the left-right direction. The burden of P can be suppressed. In addition, since the blood flow can be promoted by taking a posture in which the seated person P bends in the left-right direction, accumulation of fatigue can be suppressed.

  The vehicle seat 1 according to the present embodiment includes a base, and includes a first support member 8 including the first pressure receiving surface 61 and a second support member 9 including the second pressure receiving surface 62. Is attached to the base so as to be rotatable. Since the pressure receiving surface is configured to be rotatable by attaching the support member to the base, a structure that allows the seated person P to bend in the left-right direction can be formed relatively simply.

  Further, the vehicle seat 1 of the present embodiment includes a portion that can move in the left-right direction on the pressure-receiving surface of the seat cushion 3. Therefore, it can be easier for the seated person P to bend in the left-right direction. Therefore, it may be possible to more effectively suppress the accumulation of fatigue.

  In addition, since the rotation range is restricted, it is possible to suppress problems caused by excessive rotation. Moreover, since the part which contact | abuts a 1st rotation member or a 2nd rotation member among load receiving members rotates, rotation of a 1st rotation member or a 2nd rotation member is made smooth. Can be possible.

  By appropriately selecting the angle of the shaft member 73, when the first support member 8 or the like is rotated, the posture of the seated person P such that the position of the right shoulder and the left shoulder is twisted back and forth (yaw direction) It is also possible to make it easy to make the posture (twisting twisted) easier (see FIG. 10). At the same time, it is possible to make it easy to make the posture of twisting so that the base of the right foot and the base of the left foot of the seated person P move back and forth.

  As mentioned above, although it demonstrated centering on one embodiment, this invention can be implemented with other various forms besides the said embodiment. For example, the pressure receiving surface of the seat back is not limited to two, and can be three or more. Moreover, it is also possible to cover a plurality of pressure receiving surfaces provided on the seat back such as the first pressure receiving surface and the second pressure receiving surface with one stretchable cover. Further, in the embodiment, the first support member and the second support member are configured to be independently rotatable, but the rotation of the first support member and the second support member is interlocked. It is also possible to configure.

  Further, the seat cushion need not be movable in the left-right direction by swinging, and can be moved linearly in the left-right direction. Further, the seat cushion may not include a swingable portion. For example, as is generally used, a seat cushion of a type in which a pad or the like is attached to a fixed frame may be used.

  Further, the position of the shaft member serving as the rotation center of the first support member and the second support member is not necessarily configured to be movable up and down, and may be configured to be relatively unmovable with respect to the side frame or the like. . Further, it is not necessary to provide the pressure receiving members symmetrically in the left and right positions, and there is no need to provide one pressure receiving member in each of the left and right positions. For example, it is possible to adopt a configuration in which no pressure receiving member is provided, or it is possible to provide a larger number of pressure receiving members than in the embodiment. However, it is desirable to arrange them so that the left and right are balanced, and it is desirable to prevent the number and size of each pressure receiving member from becoming excessive. Therefore, it is desirable to arrange the vehicle seats one by one so as to be mirror-symmetric in the left-right direction with the center line of the vehicle seat as a reference line.

  Further, the shaft member does not need to be provided on each of the first support member and the second support member, and the first support member and the second support member are rotatably attached to one shaft member. A configuration is also possible.

  The vehicle is not limited to a vehicle, and may be a vehicle that flies in the air such as an airplane or a helicopter, or a vehicle that moves on the sea surface or in the sea such as a ship or a submersible.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Headrest 8 1st support member 9 2nd support member 21 Side frame 22 Upper frame 25 1st delivery part 26 2nd delivery part 27 3rd delivery Part 61 First pressure receiving surface 62 Second pressure receiving surface C Center line S Oscillating shaft R1 First rotating shaft R2 Second rotating shaft

Claims (4)

A vehicle seat comprising a seat back capable of supporting the back of the seated person and a seat cushion capable of supporting the thigh of the seated person,
The seat back includes a first pressure receiving surface and a second pressure receiving surface positioned below the first pressure receiving surface, and the first pressure receiving surface and the second pressure receiving surface are in the front-rear direction. rotatable der about a pivot axis extending in is,
The first pressure-receiving surface that receives the load of the occupant is centered on the first rotation axis, and is located to the left or right from the center position in the seat width direction that is disposed in a state that is not receiving the load of the occupant It is possible to turn to draw an arc gradually upward as it goes toward
The second pressure-receiving surface that receives the load of the occupant is centered on the second rotation axis and is located on the left or right side from the center position in the seat width direction that is disposed in a state that does not receive the load of the occupant It is possible to turn to draw an arc gradually upward as it goes toward
The vertical distance between the second pressure receiving surface and the second rotation shaft is made longer than the vertical distance between the first pressure receiving surface and the first rotation shaft. The vehicle seat is characterized in that the second pressure receiving surface is configured to have a distance that can be moved in the left-right direction larger than that of the first pressure receiving surface . The vehicle seat according to claim 1,
The seat back includes a base, and a first support member including the first pressure receiving surface and a second support member including the second pressure receiving surface are rotatably attached to the base. As well as
The first support member and the second support member are a shaft member constituting a corresponding rotation shaft, and corresponding load receivers provided on the right and left sides of the corresponding rotation shaft, respectively. A vehicle seat supported by the base via a member . The vehicle seat according to claim 1 or 2,
The seat back includes a base, and a first support member including the first pressure receiving surface and a second support member including the second pressure receiving surface are rotatably attached to the base. As well as
The base includes a pair of left and right side frames extending in the vertical direction, a spanning portion fixed between the pair of side frames and extending in the left-right direction, and movable in the vertical direction with respect to the spanning portion. And having another span attached and
The vehicle seat according to claim 1, wherein the first support member and the second support member are attached to the another span. The vehicle seat according to any one of claims 1 to 3,
A vehicle seat characterized in that a pressure-receiving surface of a seat cushion is provided with a portion movable in the left-right direction.

Images