JP2007118765A - Vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat capable of turning to a door, and improving a foot grounding property when getting on/off by tilting a seat surface relative to a horizontal surface. <P>SOLUTION: The vehicular seat 100 comprises a fixed base 7 attached to a vehicle body; a turn table 6 rotatably attached to the fixed base 7, and to which a seat cushion 5 is attached; and a seat tilting means tilting a seat cushion 5 relative to a horizontal surface so as to make the height of a part of the seat cushion 5 on a door side lower than the height before rotation, when the seat cushion 5 is rotated so as to make the vehicular seat 100 face the door. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat, and more particularly, to a vehicle seat that rotates in a door direction and tilts with respect to a horizontal plane to improve the foot-holding property and to easily get on and off the vehicle.

  Conventionally, a vehicle seat has a slide mechanism and can adjust the seat position according to the physique of the passenger, or has a rotation mechanism and functions to facilitate getting on and off by directing the seat toward the door. Have.

  In addition, there is an electric arm or the like that moves the seat out of the vehicle and has a function of supporting a person with a physical disability or an elderly person getting on and off.

  However, the seat using an electric arm has a complicated structure, and due to the size of the rotation angle, in the case of a driver's seat or a passenger seat, it causes interference with the center console box, etc., and restricts the arrangement of these seats. There is a case. In addition, since it takes a predetermined time to move the seat position, it may be impossible to get on and off quickly.

Therefore, there are vehicle seats that make it easy for passengers to get on and off the vehicle with a simple structure without providing a complicated mechanism such as an electric arm, and these seats are used when the seat is rotated for getting on and off. Is known to increase the seat slide amount, reduce the slide amount when the seat is not being rotated, and change the seat slide amount appropriately according to the rotation angle (for example, (See Patent Document 1).
Japanese Patent No. 3671208

  However, the invention described in Patent Document 1 makes it easy for passengers to get on and off by rotating the seat in the door direction and sliding the seat to the outside of the vehicle, but changes the inclination and height of the seat. As a result, there was a problem that no improvement was observed in the footing characteristics when the passenger got off the ground.

  In view of the above problems, an object of the present invention is to provide a vehicle seat that can be rotated in the door direction and that improves the foot-holding property when getting on and off by inclining the seat surface with respect to a horizontal plane.

  In order to achieve the above object, a vehicle seat according to a first aspect of the present invention includes a fixed base attached to a vehicle body, a turntable rotatably attached to the fixed base, and a seat cushion attached thereto, and the vehicle When the seat cushion is rotated such that the seat is directed toward the door, the height of a part of the surface of the seat cushion on the door side is lower than the height before rotation. Sheet tilting means for tilting the surface of the sheet with respect to a horizontal plane.

  Moreover, 2nd invention is a vehicle seat which concerns on 1st invention, Comprising: The surface of the said seat cushion is substantially rectangular shape, The said seat inclination means is when the said seat cushion is rotated. The height of the corner closest to the door among the four corners on the surface of the seat cushion is lower than the height of the corner on the surface of the seat cushion opposite to the rotation axis. The surface is inclined with respect to a horizontal plane.

  A third invention is a vehicle seat according to the first or second invention, wherein the seat tilting means tilts parallel surfaces of the fixed base and the turntable facing each other with respect to a horizontal plane. And the turntable is rotated through a rotating roller while maintaining the opposing surfaces substantially parallel to each other.

  According to the present invention, it is possible to provide a vehicle seat that can be rotated in the door direction and can improve the foot-holding property when getting on and off by inclining the seat surface with respect to a horizontal plane.

  Hereinafter, the best mode for carrying out the present invention will be described in several embodiments with reference to the drawings.

  1 is a top view illustrating a configuration example of a vehicle seat according to a first embodiment, FIG. 2 is a cross-sectional view illustrating a cross section AA of the vehicle seat illustrated in FIG. 1, and FIG. It is sectional drawing which shows the BB cross section of the vehicle seat shown in FIG. 1 to 3 illustrate an example in which the seat 100 is a passenger seat, but the seat 100 may be a driver seat, a rear seat, or other vehicle seats.

  The seat 100 includes a seat back 3, a headrest 4, and a seat cushion 5, and a center console box 2 including a shift lever 1 is disposed in the vehicle right side direction (upward in FIG. 1) of the seat 100.

  The seat back 3 is a member that serves as a backrest, the headrest 4 is a member that contacts the head of the occupant, and the seat cushion 5 is a member that the occupant sits on. The seat indicated by the dotted line represents a state in which the seat is rotated by an angle α in the door direction around the rotation center C with respect to the state in which the seat faces the vehicle front. The left side of the drawing shows the front of the vehicle.

  The seat 100 can rotate around the rotation center C, but if it rotates in the door direction by a predetermined angle or more (for example, 30 °), it contacts the center console box 2 and cannot be rotated any more.

  As shown in FIG. 2, the seat 100 is attached to the turntable 6, and the turntable 6 rotates on a fixed base 7 that is fixed to the vehicle body via a rotating roller 9 around a rotating shaft 8.

  The turntable 6 and the fixed base 7 each have opposite surfaces inclined with respect to the horizontal plane, and the inclination is lower on the vehicle rear side (right side in the drawing). Therefore, when the seat 100 is rotated in the direction of arrow R, which is the door direction as shown in FIG. 1, the door side (right side of the drawing) portion of the seat cushion 5 is lowered vertically as shown in FIG. The surface of 5 is inclined by an angle θ with respect to the horizontal plane.

  The rotating shaft 8 has a ball joint 10 at a tip portion in contact with the turntable 6 so that the turntable 6 can rotate and can be inclined with respect to a horizontal plane. Two rotating rollers 9 are arranged in the vehicle front-rear direction with the rotating shaft 8 interposed therebetween, so that the turntable 6 rotates smoothly and the turntable 6 faces the fixed base 7 even when the turntable 6 is inclined. Make the surfaces to be parallel to each other. For example, four rotation rollers 9 may be arranged around the rotation axis 8 at intervals of 90 degrees, or more than that may be arranged.

  As described above, when the seat 100 is rotated, the surface of the seat cushion 5 is inclined downward in the door direction with respect to the horizontal plane according to the rotation angle. It is possible to get off the ground outside the vehicle without greatly extending the legs outside the door.

  FIG. 4 is a graph schematically showing the relationship between the rotation angle α of the seat 100 and the degree of burden on the passenger's waist. The vertical axis represents the degree of waist burden, and the horizontal axis represents the rotation angle α of the seat. The degree of burden on the waist increases when the angle of twisting the waist when getting off the vehicle is large, and decreases when the angle of twisting the waist is small. When the rotation angle of the seat 100 reaches approximately 30 °, the occupant can take one foot out of the vehicle without twisting the waist, and when the rotation angle of the seat reaches approximately 60 °, the occupant can sit down. Both feet can be taken out of the car without twisting. In addition, when the seat rotation angle that allows one foot to be taken out of the vehicle is in the range of 30 ° to 60 °, there is no change in that one foot can be taken out of the vehicle, so the burden on the waist is when the seat rotation angle is 30 °. There is no big difference compared to the degree of waist load, and even if the seat rotation angle that allows you to put both feet outside the vehicle is in the range of about 60 ° or more, there is no change in that you can put both feet outside the vehicle, There is no significant difference compared to the degree of burden on the waist when the seat rotation angle is 60 °. Further, the difference in the degree of burden on the waist between the range where the seat rotation angle is around 30 ° to 60 ° and the range where the seat rotation angle is about 60 ° or more is that the waist rotation in the range where the rotation angle is less than about 30 °. Compared to the significant decline in the burden, there is no significant difference in the burden on the hips. This is because at least one of the legs can be taken out of the vehicle.

  Therefore, when the rotation angle of the seat 100 can reach approximately 30 °, the burden on the waist when getting on and off to a level that is not much different from that when the rotation angle of the seat is approximately 60 ° can be reduced. On the other hand, by setting the maximum rotation angle of the seat 100 to approximately 30 °, contact with the center console box 2 can be avoided and the degree of freedom of seat placement can be improved. In addition, the magnitude | size of the angle which can be rotated can be restrict | limited by arrange | positioning a stopper etc.

  FIG. 5 is a graph schematically showing the relationship between the inclination angle θ of the seat 100 with respect to the horizontal plane of the seat cushion 5 and the footing ability when the passenger gets off. The vertical axis indicates the footing property, and the horizontal axis indicates the seat inclination angle θ. Figure 5 shows the case where an average passenger gets out of a typical sedan type vehicle, and the sole side of the foot. The case where the entire landing is possible is defined as the “best” state, and the case where the sole of the foot does not land on the ground is defined as the “bad” state.

  As shown in FIG. 5, according to the experiment, until the inclination angle of the seat reaches about 7 °, the foot contact property is remarkably improved. ).

  Assuming that the maximum rotation angle of the above-mentioned seat is approximately 30 °, when the rotation angle of the seat is approximately 30 °, the inclination angle of the seat is set to about 7 °, thereby achieving good footing and low waist. Can be achieved. The inclination angle can be set by the inclination angles of the opposing surfaces of the turntable 6 and the fixed base 7.

  FIG. 6 is a top view showing a state where the passenger gets off the vehicle. FIG. 7 is a front view showing a state where the passenger gets off, FIG. 7A shows a case where the seat 100 only rotates and does not tilt, and FIG. 7B shows a case where the seat 100 rotates. And the case of tilting.

  As can be seen from a comparison between FIG. 7A and FIG. 7B, when the seat 100 is tilted, the stepping ability when getting off the vehicle is improved.

  As described above, the seat 100 according to the first embodiment realizes the sheet tilting means by rotatably supporting the turntable 6 on the fixed base 7 by the rotating shaft 8 and the rotating roller 9, and as much as necessary and sufficient. By simply rotating and tilting the seat, it is possible to improve the foot-holding property while reducing the burden on the waist when getting off the vehicle. Further, the seat 100 can be applied to a driver seat, a passenger seat, a rear seat, or the like only by changing the installation direction of the turntable 6 and the fixed base 7.

  FIG. 8 is a cross-sectional view illustrating a configuration example of the vehicle seat according to the second embodiment, and FIG. 9 is a perspective view of the fixed base 7. Here, the same reference numerals are used for members equivalent to those in the first embodiment.

  In the sheet 200, the turntable 6 and the fixed base 7 have opposing spherical surfaces, the turntable 6 has a convex spherical surface, and the fixed base 7 has a concave spherical surface. Further, the guide portion 11 protrudes from a part of the convex spherical surface of the turntable 6 and is fitted to the guide rail 7 on the concave spherical surface of the fixed base 7. The turntable 6 may have a concave spherical surface, and the fixed base 7 may have a convex spherical surface.

  Thus, the seat 200 according to the second embodiment realizes the seat tilting means by supporting the turntable 6 on the fixed base 7 by the guide 11 and the guide rail 12 so as to be rotatable and tiltable. Is a passenger seat (seat on the left side of the front part of the vehicle), it rotates counterclockwise so that the left front corner of the substantially rectangular seat cushion is lower than the other three corners. As a result, it is possible to improve the foot contact while reducing the burden on the waist when getting off.

  Moreover, since the range of rotation and inclination is restricted by the guide 11 and the guide rail 12, unnecessary rotation and inclination of the seat cushion can be prevented. Further, since the structure is simple, it can be easily applied to the driver's seat and the rear seat, and the setting of the rotation angle and the inclination angle can be easily changed.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the above-described embodiment, the fixed base 7 is fixed to the vehicle body, but the fixed base 7 may be provided with a slide mechanism and attached to the vehicle body so as to be slidable in the vehicle front-rear direction. Further, the seat cushion 5 and the turntable 6 may be fixed with bolts or the like, and may be joined so as to be slidable in the vehicle longitudinal direction by a slide mechanism.

  In the above-described embodiment, the seat cushion 5 is tilted so that one corner of the seat cushion 5 is lower than the other three corners. You may make it incline so that it may become lower than this height.

It is a top view which shows the structural example of the vehicle seat. It is AA sectional drawing of the vehicle seat shown in FIG. It is BB sectional drawing of the vehicle seat shown in FIG. It is a graph which shows the relationship between the rotation angle (alpha) of a seat, and the burden degree of a passenger | crew's waist. It is a graph which shows the relationship between the inclination | tilt angle (theta) of a sheet | seat, and the footing property at the time of alighting. It is a top view which shows the state in which a passenger gets off. It is a front view which shows the state in which a passenger gets off. FIG. 6 is a cross-sectional view of a vehicle seat according to a second embodiment. 6 is a perspective view of a fixed base according to Embodiment 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shift lever 2 Center console box 3 Seat back 4 Headrest 5 Seat cushion 6 Turntable 7 Fixed base 8 Rotating shaft 9 Rotating roller 10 Ball joint 11 Guide part 12 Guide rail 100, 200 Vehicle seat C Rotation center R Rotation direction α Rotation Angle θ Inclination angle

Claims (3)

A fixed base attached to the vehicle body,
A turntable that is rotatably attached to the fixed base and to which a seat cushion is attached;
When the seat cushion is rotated so that the vehicle seat faces the door, the height of a portion of the surface of the seat cushion on the door side is lower than the height before rotation. Seat tilting means for tilting the surface of the seat cushion with respect to a horizontal plane;
A vehicle seat comprising: The seat cushion has a substantially rectangular surface.
When the seat cushion is rotated, the seat cushion surface is such that, of the four corners on the surface of the seat cushion, the height of the corner closest to the door is opposite to the rotation axis. The surface of the seat cushion is inclined with respect to a horizontal plane so as to be lower than the height of the corner in
The vehicle seat according to claim 1. The sheet tilting means is arranged such that parallel surfaces of the fixed base and the turntable facing each other are tilted with respect to a horizontal plane, and the facing surfaces are maintained substantially parallel via a rotating roller. Rotate the table,
The vehicular seat according to claim 1 or 2 characterized by things.

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