JP2021098452A - Vehicle seat device - Google Patents

Abstract

To simplify a mechanism for rotating a seat body, which can incline so that the front side is lowered at a position (a riding position) where an occupant gets on/off a vehicle, in a compact space.SOLUTION: A vehicle seat device includes a rotation mechanism 40 (a four-node link mechanism 40r) which rotates a seat body between a seated position in which the seat body faces the vehicle front and a riding position in which the seat body faces the door opening side. The four-node link mechanism 40r rotates the seat body and a rotary table 45 while moving a rotation center and inclines the seat body so that the front side is lowered in a process that the seat body and the rotary table 45 are rotated from the seated position to the riding position.SELECTED DRAWING: Figure 5

Description

The present invention relates to a vehicle seat device including a rotation mechanism for rotating the seat body between a seating position facing forward of the vehicle and a boarding / alighting position facing the door opening side.

A vehicle seat device relating to this is described in Patent Document 1. As shown in FIG. 11, the vehicle seat device 100 described in Patent Document 1 has a rotation mechanism 105 that rotates the seat body 103 and the seat body 103 between a seating position facing forward of the vehicle and a boarding / alighting position facing the door opening side. And have. The rotation mechanism 105 includes a disk-shaped lower plate 105d fixed to the vehicle floor F, and a disk-shaped upper plate 105u that is overlapped with the lower plate 105d and configured to be rotatable in a coaxial state. The seat body 103 is installed on the upper plate 105u.

The lower plate 105d and the upper plate 105u are inclined so that the door opening side is lowered. As a result, when the seat body 103 rotates to the boarding / alighting position on the door opening side by the action of the lower plate 105d and the upper plate 105u, the seat body tilts so that the front side becomes lower during the rotation process. As a result, the boarding / alighting performance of the vehicle seat device 100 is improved.

Japanese Unexamined Patent Publication No. 2000-052827

However, in the rotation mechanism 105 of the vehicle seat device 100, the center of rotation is a fixed position. Therefore, when the seat body 103 is rotated between the seating position and the boarding / alighting position, a relatively large space is required in order to avoid interference between the seat body 103 and the support of the vehicle body, the center console, or the like. Further, when the seat body 103 is rotated in a relatively narrow space, it is necessary to avoid interference with the support column, the center console, etc. while moving the seat body 103 back and forth by the front-rear slide mechanism or the like. Therefore, in this case, a front / rear slide mechanism or the like is required in addition to the rotation mechanism 105.

The present invention has been made to solve the above problems, and the problem to be solved by the present invention is to provide a seat body that is tiltable so that the front side is lowered at the boarding / alighting position in a compact space. It is to simplify the mechanism that can be rotated by.

The above-mentioned problems are solved by each invention. The first invention is a vehicle seat device including a rotation mechanism for rotating a seat body between a seating position facing forward of the vehicle and a boarding / alighting position facing the door opening side, wherein the rotation mechanism moves the center of rotation. In the process of rotating the seat body and further rotating the seat body from the seating position to the boarding / alighting position, the seat body is tilted so that the front side of the seat body is lower than the rear side.

According to the present invention, the rotation mechanism rotates the seat body while moving the center of rotation. Therefore, it is possible to rotate the seat body by the independent operation of the rotation mechanism, for example, while avoiding the support columns of the vehicle body, the center console, and the like. That is, the mechanism can be simplified as compared with the conventional vehicle seat device in which the rotation mechanism that rotates the seat body while holding the rotation center axis at a fixed position and the front-rear slide mechanism are separately provided. Further, when the seat body is rotated from the seating position to the boarding / alighting position by the action of the rotation mechanism, the tilt operation of tilting the seat body so that the front side is lowered can be performed.

According to the second invention, the rotating mechanism includes a four-node link mechanism installed between a non-rotatable fixing member and a rotating member that supports the seat body, and the rotation center side of the four-node link mechanism is fixed. Connected to the member, the free-rotating end side of the four-bar linkage is connected to the rotating member, and the four-bar link mechanism is inclined so that the door opening side is lower than the vehicle center side. There is. Therefore, in the process of rotating the seat body from the seating position to the boarding / alighting position, the seat body is tilted so that the front side is lowered.

According to a third invention, a fixed-side connecting shaft that connects the rotation center side of the four-node link mechanism and the fixing member, and a rotation that connects the free-rotating end side of the four-node link mechanism and the rotating member. The side connecting shaft is tilted at the same angle.

According to the fourth invention, the four-node link mechanism rotates around a front link that can rotate around the fixed side connecting shaft on the fixing member and another fixed side connecting shaft behind the front link. It is provided with a movable rear link, and the rotating side connecting shaft at the free-rotating end of the front link makes an arc when it makes a circular motion from the seating position to the boarding / alighting position so as to approach the door opening. It recedes at the initial stage of the motion, then moves forward in the circular motion, and the rotating side connecting shaft at the free-rotating end of the rear link is aligned with the circular motion of the free-rotating end of the front link. It retreats at the initial stage of the circular motion and moves forward in the subsequent circular motion. That is, the rotating member that supports the seat body retracts while approaching the door opening by the action of the front link and the rear link of the four-bar link mechanism at the initial stage of rotation that rotates from the seating position to the boarding / alighting position. After that, the seat body and the rotating member (seat body, etc.) rotate while approaching the door opening and move forward. As a result, the seat body does not interfere with the center console or the like.

According to the fifth invention, from the state where the fixed side connecting shaft and the rotating side connecting shaft of the front link and the rotating side connecting shaft of the rear link are in a straight line in a plan view, the rotating side connecting shaft of the front link. Moves in an arc so as to approach the door opening, so that the rotating side connecting shaft of the front link and the rotating side connecting shaft of the rear link both move forward.

According to the sixth invention, the rotating side connecting shaft of the front link is the door from the state where the fixed side connecting shaft and the rotating side connecting shaft of the front link and the rotating side connecting shaft of the rear link are in a straight line. By making an arc motion so as to approach the opening, the seat body on the rotating member is tilted so that the front side of the seat body is lower than the rear side.

According to the present invention, it is possible to simplify the mechanism for rotating the seat body that can be tilted so that the front side is lowered at the boarding / alighting position in a compact space.

It is a schematic side view which shows the door opening of the vehicle which comprises the vehicle seat device which concerns on Embodiment 1 of this invention. It is a side view of the vehicle seat device in a state where the seat body is in the seating position facing forward of the vehicle. It is a vertical cross-sectional view (III-III arrow cross-sectional view of FIG. 5) which looked at the state which the seat body of the vehicle seat device is in a seating position from the rear. It is a vertical cross-sectional view (IV-IV arrow cross-sectional view of FIG. 5) which looked at the state which the seat body of the vehicle seat device is in a seating position from the rear. It is a top view which shows the operation of the rotation mechanism (four-section link mechanism) of the vehicle seat device. It is a top view which shows the operation of the rotation mechanism (four-section link mechanism) of the vehicle seat device. It is a top view which shows the operation of the rotation mechanism (four-section link mechanism) of the vehicle seat device. It is a top view which shows the operation of the rotation mechanism (four-section link mechanism) of the vehicle seat device. It is a vertical cross-sectional view (IX-IX arrow cross-sectional view of FIG. 8) which looked at the state which the seat body of the vehicle seat device is in a boarding / alighting position from the rear. It is a vertical cross-sectional view (XX arrow cross-sectional view of FIG. 8) which looked at the state which the seat body of the vehicle seat device is in a boarding / alighting position from the rear. It is a rear view which shows the conventional vehicle seat device.

[Embodiment 1]
Hereinafter, the vehicle seat device according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 10. The vehicle seat device 10 according to the present embodiment is a seat device installed on the right side of the vehicle interior of the vehicle. Here, the front-rear, left-right, and up-down shown in the figure correspond to the front-back, left-right, and up-down of the vehicle provided with the vehicle seat device 10.

<Overview of vehicle seat device 10>
As shown in FIGS. 1 to 4, the vehicle seat device 10 includes a seat body 20 on which an occupant sits, a front-rear slide mechanism 30 (see FIG. 2 and the like) that slides the seat body 20 in the front-rear direction of the vehicle, and front and rear thereof. A rotation mechanism 40 for rotating the seat body 20 on the slide mechanism 30 is provided. Further, the vehicle seat device 10 includes a rotation lock device (not shown) that locks the rotation of the rotation mechanism 40.

<About the front / rear slide mechanism 30>
As shown in FIGS. 2 to 4, the front-rear slide mechanism 30 includes a pair of left and right lower rails 32 fixed on the vehicle floor F and extending in the front-rear direction of the vehicle, and a pair of left and right lower rails 32 that slide back and forth along the pair of left and right lower rails 32. The upper rail 33 is provided. A pair of left and right upper rails 33 are fixed to the lower surface of the front / rear slide base 35. Here, the upper rail 33 is configured to be slid-locked to the lower rail 32 in multiple stages by the action of a multi-stage lock mechanism (not shown).

<About the rotation mechanism 40>
The rotation mechanism 40 is a mechanism for rotating the seat body 20 while moving the center of rotation in the front-rear direction between the seating position facing forward of the vehicle and the boarding / alighting position facing the door opening D (see FIG. 1) on the right side. As shown in FIGS. 2 to 4, the rotary mechanism 40 can be rotated while tilting the rotary table 45 forward on the rotary table 45 that supports the seat body 20 and the front-rear slide base 35 of the front-rear slide mechanism 30. It is equipped with a four-node link mechanism 40r that supports it. As shown in FIGS. 2 to 4, the four-section link mechanism 40r is composed of a front link 41 and a rear link 42. The front link 41 and the rear link 42 of the four-bar link mechanism 40r are connected to the front / rear slide base 35 and the rotary table 45 in a state of being inclined so that the door opening D side, that is, the right side is lowered. There is.

As shown in FIG. 5, the rotation center side of the front link 41 of the four-node link mechanism 40r is rotatable on the right side in the width direction of the front portion of the front / rear slide base 35 via the lower connecting shaft 41d. It is connected. Here, as shown in FIG. 4, the front-rear slide base 35 has an inclined portion 35k at a portion where the front link 41 is connected, and the inclined portion 35k becomes lower on the right side (door opening D side). It is inclined like. The lower connecting shaft 41d is connected to the front-rear slide base 35 in a state perpendicular to the inclined portion 35k. That is, the lower connecting shaft 41d is erected on the front-rear slide base 35 in a state of being tilted to the right.

As shown in FIG. 5, the tip end side of the front link 41, that is, the free-rotating end side, is rotatably connected to the substantially central portion of the rotary table 45 via the upper connecting shaft 41u. Here, as shown in FIG. 4, the portion of the rotary table 45 to which the front link 41 is connected is an inclined portion 45k, and the inclined portion 45k is at an angle equal to the inclined portion 35k of the front-rear slide base 35. It is tilted so that the right side is low. The upper connecting shaft 41u is connected to the rotary table 45 in a state perpendicular to the inclined portion 45k. That is, the upper connecting shaft 41u is provided on the lower side of the rotary table 45 at an inclination angle equal to that of the lower connecting shaft 41d.

As shown in FIG. 5, the rotation center side of the rear link 42 of the four-node link mechanism 40r is rotatably connected to the central portion in the width direction of the rear portion of the front-rear slide base 35 via the lower connecting shaft 42d. ing. Here, as shown in FIG. 3, the front-rear slide base 35 has an inclined portion 35k at a portion to which the rear link 42 is connected. The lower connecting shaft 42d is connected to the front-rear slide base 35 in a state perpendicular to the inclined portion 35k. That is, the lower connecting shaft 42d is erected on the front-rear slide base 35 at an inclination angle equal to that of the lower connecting shaft 41d of the front link 41.

As shown in FIG. 5, the tip end side of the rear link 42, that is, the free-rotating end side, is rotatably connected to the rear right corner of the rotary table 45 via the upper connecting shaft 42u. Here, as shown in FIG. 3, the portion of the rotary table 45 to which the rear link 42 is connected is an inclined portion 45k. The upper connecting shaft 42u is connected to the rotary table 45 in a state perpendicular to the inclined portion 45k. That is, the upper connecting shaft 42u is provided on the lower side of the rotary table 45 at an inclination angle equal to that of the upper connecting shaft 41u of the front link 41.

As shown in FIGS. 2 to 4, the height dimensional difference between the front link 41 and the rear link 42 on the rotation center side and the rotation free end side is equal to the clearance dimension between the front / rear slide base 35 and the rotary table 45. It is set to be a value.

<About the operation of the rotation mechanism 40>
With the above configuration, when an external force is applied to the seat body 20 in the seating position (see FIG. 5) in the clockwise rotation direction, the tip end side (rotation free end side) of the front link 41 of the four-bar link mechanism 40r rotates. It receives an external force to the right through the table 45. As a result, the front link 41 rotates counterclockwise from the position shown in FIG. 5 about the lower connecting shaft 41d. That is, the upper connecting shaft 41u connected to the tip end side of the front link 41 makes an arc motion so as to approach the door opening D.

Then, from the initial stage of the circular motion, that is, from the seating position (see FIG. 5) until the front link 41 rotates left by θ1 °, the upper connecting shaft 41u and the upper connecting shaft 41u are connected as shown in FIG. The connected rotary table 45 moves backward while moving to the door opening D side (right side). Further, due to the retreat of the upper connecting shaft 41u connected to the front link 41, the upper connecting shaft 42u connected to the tip end side of the rear link 42 receives a force in the rear direction via the rotary table 45. As a result, the rear link 42 rotates slightly clockwise around the lower connecting shaft 42d. As a result, as shown in FIG. 6, the seat body 20 and the rotary table 45 (seat body 20 and the like) move backward while moving to the door opening D side (right side) (see the white arrow).

Then, when an external force is continuously applied to the seat body 20 in the clockwise direction from the state where the front link 41 is rotated θ1 ° to the left from the seating position (see FIG. 6), the seat body 20 is as shown in FIG. Etc. rotate to the right while moving to the right, and the front link 41 rotates to the left from the position at the angle θ1. Then, with the front link 41 rotated counterclockwise by an angle θ2 from the position of the angle θ1, the lower connecting shaft 41d and the upper connecting shaft 41u of the front link 41 and the upper connecting shaft 42u of the rear link 42 are viewed in a plan view. Is held in a straight line. In this state, the rotary table 45 faces to the right by an angle of approximately θ2, and the rear right corner portion of the rotary table 45 projects rearward from the rear end edge of the front-rear slide base 35. This position is the retreat limit position of the rotary table 45.

When an external force is further applied to the seat body 20 in the retreat limit position in the clockwise rotation direction, as shown in FIG. 8, both the front link 41 and the rear link 42 rotate counterclockwise, and the seat body 20 and the like move forward. It will rotate to the right while moving to. That is, the seat body 20 and the like rotate to the right while moving the center of rotation forward. Then, the seat body 20 and the like reach the boarding / alighting position in a state where the front link 41 is rotated by an angle θ3 from the backward limit position (see FIG. 8).

Further, as described above, the front / rear slide base 35 and the rotary table 45 are in a state where the front link 41 and the rear link 42 of the four-bar link mechanism 40r are inclined so that the door opening D side (right side) is lowered. Is connected to. Therefore, when the front link 41 and the rear link 42 rotate counterclockwise from the retracted limit position and the seat body 20 or the like rotates to the right while moving the rotation center forward, the seat body 20 or the like is shown in FIG. , As shown in FIG. 10, the front side is inclined so as to be low.

<Handling of vehicle seat device 10>
When the seat body 20 of the vehicle seat device 10 is in the seating position facing forward of the vehicle, the rotation lock device locks and the seat body 20 is held non-rotatably. In this state, the seat body 20 can only slide back and forth by the front and rear slide mechanism 30. That is, by releasing the slide lock of the front-rear slide mechanism 30 and applying a force to the seat body 20 in the front-rear direction, the front-rear position of the seat body 20 can be adjusted by the action of the front-rear slide mechanism 30.

Next, when the seat body 20 is rotated in the direction of the door opening D, the lock operation of the rotation lock device is released while the slide lock of the front / rear slide mechanism 30 is working. As a result, when a force is applied to the seat body 20 in the clockwise direction, the seat body 20 is rotated to the right by the action of the rotation mechanism 40 (four-bar link mechanism 40r). That is, first, the front link 41 of the four-bar link mechanism 40r rotates counterclockwise by an angle (θ1 + θ2) ° from the seating position, and the rear link 42 also rotates rightward from the seating position to the backward limit position. The main body 20 and the rotary table 45 (seat main body 20 and the like) rotate to the right while moving to the door opening D side (right side), and retreat to the retreat limit position (see FIGS. 6 and 7).

Next, when the front link 41 and the rear link 42 both rotate counterclockwise from the retracted limit position, the seat body 20 and the like rotate clockwise while moving forward as shown in FIG. .. That is, the seat body 20 and the like rotate to the right while moving the center of rotation forward. Further, when the seat body 20 or the like rotates to the right while moving the center of rotation forward, the seat body 20 or the like is tilted by the front link 41 and the rear link 42, so that the seat body 20 or the like is as shown in FIGS. 9 and 10. Tilt so that the front side is low. Then, the rotation lock device locks when the seat body 20 and the like rotate to the boarding / alighting position.

When returning the seat body 20 to the seating position facing forward of the vehicle, a force is applied to the seat body 20 in the counterclockwise direction with the lock operation of the rotation lock device released. As a result, the seat body 20 and the like are returned to the seating position with the same locus by the action of the four-node link mechanism 40r.

<Correspondence between the terms used in the present embodiment and the terms of the present invention>
The front-rear slide base 35 in the present embodiment corresponds to the fixing member of the present invention, and the rotary table 45 corresponds to the rotating member of the present invention. Further, the lower connecting shafts 41d and 42d correspond to the fixed side connecting shafts of the present invention, and the upper connecting shafts 41u and 42u correspond to the rotating side connecting shafts of the present invention.

<Advantages of the vehicle seat device 10 according to this embodiment>
According to the present invention, the rotation mechanism 40 rotates the seat body 20 while moving the center of rotation. Therefore, it is possible to rotate the seat body by the independent operation of the rotation mechanism 40, for example, while avoiding the support columns of the vehicle body, the center console, and the like. That is, the mechanism can be simplified as compared with the conventional vehicle seat device in which the rotation mechanism that rotates the seat body while holding the rotation center axis at a fixed position and the front-rear slide mechanism are separately provided. Further, when the seat body 20 is rotated from the seating position to the boarding / alighting position by the action of the rotation mechanism 40, the seat body 20 can be tilted so that the front side is lowered.

Further, the rotary table 45 (rotating member) that supports the seat body 20 is rotated from the seating position to the boarding / alighting position at the initial stage of rotation. Retreat while approaching the opening D. After that, the seat body 20 and the rotary table 45 (seat body 20 and the like) rotate while approaching the door opening D and move forward. As a result, the seat body 20 does not interfere with the center console or the like of the vehicle.

<Change example>
The present invention is not limited to the above embodiment, and changes can be made without departing from the gist of the present invention. For example, in the present embodiment, an example is shown in which the four-node link mechanism 40r of the rotation mechanism 40 is provided on the front-rear slide base 35 of the front-rear slide mechanism 30. However, it is also possible to provide a four-bar link mechanism 40r on the vehicle floor F and provide a front-rear slide mechanism 30 and a seat body 20 on the rotary table 45. Further, in the present embodiment, an example in which the seat body 20 is manually rotated is shown. However, for example, it is possible to rotate the seat body 20 by rotating the four-node link mechanism 40r using the rotational force of the motor. Further, in the present embodiment, the rotation mechanism 40 that can rotate in the direction of the door opening D provided on the right side of the vehicle is illustrated, but the rotation mechanism 40 is rotated in the direction of the door opening D provided on the left side. It is also possible to make it movable.

10 ... Vehicle seat device 20 ... Seat body 35 ... Front and rear slide base (fixing member)
40 ... Rotation mechanism 40r ... Four-node link mechanism 41 ... Front link 41d ... Lower connecting shaft (fixed side connecting shaft)
41u ... Upper connecting shaft (rotating side connecting shaft)
42 ... Rear link 42d ... Lower connecting shaft (fixed side connecting shaft)
42u ... Upper connecting shaft (rotating side connecting shaft)
45 ... Rotating table (rotating member)

Claims (6)

A vehicle seat device having a rotation mechanism that rotates the seat body between a seating position facing the vehicle forward and a boarding / alighting position facing the door opening side.
The rotation mechanism rotates the seat body while moving the center of rotation, and in the process of further rotating the seat body from the seating position to the boarding / alighting position, the seat so that the front side of the seat body is lower than the rear side. A vehicle seat device that tilts the main body. The vehicle seat device according to claim 1.
The rotating mechanism includes a four-bar link mechanism installed between a non-rotatable fixing member and a rotating member that supports the seat body.
The rotation center side of the four-node link mechanism is connected to the fixing member, and the free-rotating end side of the four-node link mechanism is connected to the rotating member.
The four-section link mechanism is a vehicle seat device in which the door opening side is inclined so as to be lower than the vehicle center side. The vehicle seat device according to claim 2.
The fixed-side connecting shaft that connects the rotation center side of the four-bar linkage and the fixing member is equal to the rotating-side connecting shaft that connects the free-rotating end side of the four-bar link mechanism and the rotating member. Vehicle seating device that is tilted at an angle. The vehicle seat device according to claim 3.
The four-node link mechanism includes a front link that can rotate around the fixed side connecting shaft on the fixing member, and a rear link that can rotate around another fixed side connecting shaft behind the front link. Is equipped with
The rotating side connecting shaft at the free-rotating end of the front link retracts at the initial stage of the circular motion when it makes a circular motion from the seating position to the boarding / alighting position so as to approach the door opening, and then the arc. Move forward with exercise,
The rotating side connecting shaft at the free-rotating end of the rear link retracts at the initial stage of the circular motion in accordance with the circular motion of the free-rotating end of the front link, and moves forward in the subsequent circular motion. Vehicle seat device. The vehicle seat device according to claim 4.
From the state where the fixed side connecting shaft and the rotating side connecting shaft of the front link and the rotating side connecting shaft of the rear link are in a straight line in a plan view, the rotating side connecting shaft of the front link is the door opening. A vehicle seat device in which the rotating side connecting shaft of the front link and the rotating side connecting shaft of the rear link both move forward by making an arc motion so as to approach. The vehicle seat device according to claim 4.
The rotating side connecting shaft of the front link approaches the door opening from the state where the fixed side connecting shaft and the rotating side connecting shaft of the front link and the rotating side connecting shaft of the rear link are in a straight line. A vehicle seat device in which the seat body on the rotating member is tilted so that the front side of the seat body is lower than the rear side by making an arc motion.

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