JP7444031B2 - rotating seat - Google Patents

Description

The present invention relates to a rotary seat.

2. Description of the Related Art Conventionally, rotary seats are known in which a seat body can be rotated between a seating position and an ingress/egress position. For example, Japanese Patent Application Publication No. 2020-147186 discloses a non-rotatable fixed member, a seat main body, a rotating member that supports the seat main body, a four-bar link mechanism installed between the fixed member and the rotating member, A rotary seat is disclosed. The four-bar linkage has two links. One end of each link is rotatably connected to a fixed member, and the other end of each link is rotatably connected to a rotating member. Due to the operation of the four-bar linkage mechanism, the seat body and the rotating member rotate while moving the center of rotation with respect to the fixed member.

In this rotating seat, the four-bar linkage mechanism operates, so that the seat body and the rotating member rotate while moving the center of rotation relative to the fixed member. Therefore, by the independent operation of the four-bar link mechanism, for example, it is possible to rotate the seat body while avoiding obstacles in the front-back direction.

Japanese Patent Application Publication No. 2020-147186

In the rotating seat described in JP-A-2020-147186, in order to avoid vehicle obstacles (pillars, etc.), it is necessary to ensure a large travel distance of the seat body, that is, to increase the size of the four-bar link mechanism. It becomes necessary. This increases the length of each link of the four-bar link mechanism, reducing the rigidity of the link.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary seat that can secure a moving distance of a seat body between a seating position and an ingress/egress position while suppressing a decrease in rigidity of a connecting unit.

A rotating seat according to one aspect of the present invention includes a base plate fixed to a floor side, a seat body disposed on the base plate, and fixed to a lower surface of the seat body so as not to rotate relative to the seat body. The rotary plate is rotatable relative to the base plate between a seating position where the seat body faces the front of the vehicle and an ingress/egress position where the seat body faces a door opening of the vehicle. a connection unit that connects the base plate and the rotation plate, the connection unit includes a link that connects the base plate and the rotation plate, a rail fixed to the base plate, and a link that connects the base plate and the rotation plate; a movable slider, the slider supporting the rotating plate such that the rotating plate is rotatable relative to the slider, and the link is rotatable relative to the base plate. a fixed end fixed to the base plate so that a rotating end fixed to a rotating plate, the rail has a radius twice the distance between the fixed end and the rotating end, and has a radius centered on the fixed end. The slider has a shape that extends linearly along the diameter of an imaginary circle, and the slider moves a portion of the rotary plate away from a portion fixed to the rotary end portion from the seating position to the slider. When moving to the getting-on/off position, the rotary plate is moved along the slider while being rotated relative to the slider in the same direction as the rotary plate rotates with respect to the rotary end.

According to the present invention, it is possible to provide a rotary seat that can secure the moving distance of the seat body between the seating position and the getting-on/off position while suppressing a decrease in the rigidity of the connection unit.

FIG. 2 is a perspective view of the rotary seat in the seating position according to the first embodiment of the present invention. FIG. 3 is a perspective view of the rotary seat at the getting on/off position. FIG. 3 is an exploded perspective view of the rotary seat. FIG. 3 is a perspective view showing the vicinity of the rotating end of the link. FIG. 3 is a perspective view showing a state of the base plate viewed from the back side. It is a figure which shows roughly the positional relationship of the base plate, the rotation plate, and the connection unit in a seating position. It is a figure which shows schematically the positional relationship of the base plate, the rotating plate, and the connection unit in the state where the link rotated 10 degrees centering on the fixed end part from a seating position. It is a figure which shows schematically the positional relationship of the base plate, the rotation plate, and the connection unit in the state where the link rotated 20 degrees centering on the fixed end part from a seating position. FIG. 3 is a diagram schematically showing the positional relationship of the base plate, rotating plate, and connection unit in a state where the link has rotated 30 degrees around the fixed end from the seating position. It is a figure which shows schematically the positional relationship of the base plate, the rotation plate, and the connection unit in the state where the link rotated 40 degrees centering on the fixed end part from a seating position. FIG. 7 is a perspective view showing a base plate, a rotary plate, and a connection unit of a rotary seat according to a second embodiment of the present invention. 12 is a plan view of the base plate and connection unit shown in FIG. 11. FIG.

Embodiments of this invention will be described with reference to the drawings. In addition, in the drawings referred to below, the same numbers are attached to the same or corresponding members.

(First embodiment)
FIG. 1 is a perspective view of a rotating seat in a seating position according to a first embodiment of the present invention. FIG. 2 is a perspective view of the rotary seat in the getting-on/off position. FIG. 3 is an exploded perspective view of the rotating seat.

As shown in FIGS. 1 to 3, the rotary seat 1 of this embodiment includes a base plate 100, a seat body 200, a rotary plate 300, and a connection unit 400. This rotating seat 1 functions as a vehicle seat, particularly a vehicle seat.

The base plate 100 is fixed to the floor 2 side of the vehicle. The base plate 100 has a connecting portion 110 and a through hole 120.

The connecting portions 110 are formed at both ends of the base plate 100 in the width direction of the vehicle. The connecting portion 110 is connected to a sheet slider 3, which will be described later. The through hole 120 will be described later.

The seat body 200 is arranged on the base plate 100. The seat body 200 is movable between a seating position (the position shown in FIG. 1) and an egress position (the position shown in FIG. 2). The seating position is a position where the seat body 200 faces the front of the vehicle. The seat body 200 in the seating position is located inside the pillar 4 that constitutes a part of the frame of the vehicle body. The getting-on/off position is a position where the seat body 200 faces the door opening of the vehicle. The seat body 200 in the getting-on/off position faces the door opening in front of the pillar 4.

The seat body 200 includes a seat cushion 210 and a seat back 220. Seat cushion 210 constitutes a seat portion. The seat back 220 supports the back of an occupant seated on the seat cushion 210.

A seat slider 3 that slides a seat body 200 relative to the floor 2 in the longitudinal direction of the vehicle is attached to the floor 2. The seat slider 3 has a lower rail 3a and an upper rail 3b.

The lower rail 3a is fixed to the floor 2 in a posture parallel to the longitudinal direction of the vehicle. The upper rail 3b is movable relative to the lower rail 3a in the longitudinal direction of the vehicle (the longitudinal direction of the lower rail 3a).

The connecting portion 110 of the base plate 100 is fixed to the upper rail 3b. Therefore, the base plate 100 is movable in the longitudinal direction of the vehicle together with the upper rail 3b with respect to the lower rail 3a.

The rotating plate 300 is fixed to the lower surface of the seat body 200 so as not to rotate relative to the seat body 200.

The connection unit 400 connects the base plate 100 and the rotating plate 300 so that the rotating plate 300 can rotate relative to the base plate 100 between the seating position and the getting-on/off position.

The connection unit 400 includes a link 410, a roller 420, a protrusion 432, a fixing member 434, a first rail 450 corresponding to a rail, a first slider 460 corresponding to a slider, and a first slider 460 corresponding to another rail. 2 rail 470, and a second slider 480 corresponding to another slider.

Link 410 connects base plate 100 and rotating plate 300. Link 410 has a shape that extends linearly. Link 410 has a fixed end 411 and a rotating end 412.

The fixed end portion 411 is fixed to the base plate 100 so as to be rotatable relative to the base plate 100. The fixed end portion 411 is constituted by one end portion of the link 410.

The rotating end portion 412 is rotatable relative to the base plate 100 about the fixed end portion 411 and is fixed to the rotating plate 300 so as to be rotatable relative to the rotating plate 300. The rotating end portion 412 is constituted by the other end portion of the link 410.

The roller 420 is fixed to the link 410 so as to be in contact with the upper surface of the base plate 100 and spaced apart from the rotating plate 300. When the link 410 rotates about the fixed end 411, the roller 420 moves on the base plate 100 together with the rotating end 412 while contacting the upper surface of the base plate 100. That is, the link 410 is supported by the base plate 100 at two points: the fixed end 411 and the roller 420.

The protrusion 432 has a shape that protrudes from the link 410 toward the base plate 100. The through hole 120 of the base plate 100 has a shape that includes the locus of movement of the protrusion 432. In this embodiment, the through hole 120 is formed in an arc shape. The protrusion 432 is inserted into the through hole 120.

As shown in FIGS. 4 and 5, the fixing member 434 is fixed to a portion of the protrusion 432 that protrudes downward from the base plate 100. As shown in FIGS. The fixing member 434 has a shape that comes into contact with the lower surface of the base plate 100 when the protrusion 432 moves upward with respect to the base plate 100.

The first rail 450 is fixed to the base plate 100. As shown in FIGS. 6 to 10, the first rail 450 has a radius twice as long as the distance between the fixed end 411 and the rotating end 412, and has an imaginary center around the fixed end 411. It has a shape that extends linearly along the diameter of the circle A1. In this embodiment, the first rail 450 has a shape extending from one side of the center B1 to the other side on the diameter of the virtual circle A1. The first rail 450 is fixed to the base plate 100 in a position parallel to the seat slider 3. However, the first rail 450 may be fixed to the base plate 100 in a posture intersecting the seat slider 3.

The first slider 460 is movable along the first rail 450. The first slider 460 supports the rotating plate 300 so that the rotating plate 300 can rotate relative to the first slider 460. The first slider 460 supports a portion of the rotating plate 300 that is spaced apart from a portion fixed to the rotating end portion 412. As shown in FIGS. 6 to 10, the rotating end portion 412 is fixed to the rear portion of the rotating plate 300, and the first slider 460 is located at the rear portion of the rotating plate 300 and at the rotating end portion in the width direction of the vehicle. A portion inside the portion 412 (hereinafter referred to as “first supported portion 310”) is supported.

The first slider 460 rotates the first supported portion 310 in the direction in which the rotating plate 300 rotates with respect to the rotating end portion 412 when the rotating plate 300 moves from the seating position to the getting-on/off position (clockwise in FIG. 6). It is moved forward along the first slider 460 while being rotated relative to the first slider 460 in the same direction. When the seat main body 200 moves from the seating position to the getting-on/off position, the first slider 460 has a circle A2 whose radius is the length between the fixed end 411 and the rotating end 412 and whose center is the rotating end 412. moves along the locus of the point on the circle A2 (the diameter of the virtual circle A1) when it rotates while being inscribed in the virtual circle A1. The point on the circle A2 corresponds to the first supported part 310.

The second rail 470 has a shape that extends linearly along the diameter of the virtual circle A1. The second rail 470 is fixed to the base plate 100 in a posture intersecting the first rail 450. In this embodiment, the second rail 470 is located only on one side of the center B1 on the diameter of the virtual circle A1. The second rail 470 is fixed to the base plate 100 in such a manner that it gradually separates from the first rail 450 in the direction toward the entrance/exit as it moves toward the front of the vehicle.

The second slider 480 is movable along the second rail 470. The second slider 480 supports the rotating plate 300 so that the rotating plate 300 can rotate relative to the second slider 480. The second slider 480 is a portion of the rotating plate 300 that is spaced apart from both the portion fixed to the rotating end portion 412 and the first supported portion 310 (hereinafter referred to as “second supported portion 320”). is supported. As shown in FIGS. 6 to 10, the second supported portion 320 corresponds to the center portion of the rotating plate 300. As shown in FIGS.

The second slider 480 rotates the second supported portion 320 in the direction in which the rotating plate 300 rotates with respect to the rotating end portion 412 (clockwise in FIG. 6) when the rotating plate 300 moves from the seating position to the getting-on/off position. It is moved forward along the second slider 480 while being rotated relative to the second slider 480 in the same direction. The second slider 480 is configured to follow the locus of a point on the circle A2 (the diameter of the virtual circle A1) when the seat body 200 moves from the seating position to the getting-on/off position, and the circle A2 rotates while being inscribed in the virtual circle A1. Move along. The point on the circle A2 corresponds to the second supported part 320.

Next, the operation of the seat body 200 in the rotary seat 1 will be described with reference to FIGS. 6 to 10. FIG. 6 shows the relationship between the rotary plate 300 and the connection unit 400 in the seating position. A boarding/exit door is provided above in FIG. 6 . Note that in FIGS. 6 to 10, the rotating plate 300 is indicated by a two-dot chain line.

In the seating position shown in FIG. 6, the rotating end 412 is located at the rear end of the through hole 120, the first slider 460 is located at the rear end of the first rail 450, and the second The slider 480 is located at the rear end of the second rail 470. Note that the part of the rotating plate 300 that is supported by the first slider 460 (the first supported part 310) and the part of the rotating plate 300 that is supported by the second slider 480 (the second supported part 320) are as follows. , is located on circle A2.

FIG. 7 is a diagram schematically showing the positional relationship of the base plate, rotating plate, and connection unit in a state where the link is rotated 10 degrees around the fixed end from the seated position. FIG. 8 is a diagram schematically showing the positional relationship of the base plate, rotating plate, and connection unit in a state where the link is rotated 20 degrees around the fixed end from the seated position. FIG. 9 is a diagram schematically showing the positional relationship of the base plate, rotating plate, and connection unit in a state where the link has rotated 30 degrees around the fixed end from the seated position. FIG. 10 is a diagram schematically showing the positional relationship of the base plate, rotating plate, and connection unit in a state where the link has rotated 40 degrees around the fixed end from the seated position. Note that the rotation angle of the link 410 is determined by a straight line connecting the center B1 of the virtual circle A1 and the center B2 of the circle A2 in the seating position (FIG. 6), and a straight line connecting the center B1 and the center B2 in the current position of the link 410. and means the angle formed by.

As shown in FIGS. 6 to 10, as the rotating end 412 of the link 410 rotates about the fixed end 411, the first slider 460 moves forward along the first rail 450. At the same time, the second slider 480 moves forward along the second rail 470. At this time, the rotating plate 300 rotates toward the entrance/exit. Specifically, the part of the rotating plate 300 that is fixed to the rotating end 412 rotates toward the entrance/exit with respect to the rotating end 412, and each supported part 310, 320 is fixed to the rotating end 412. On the other hand, it moves forward along each rail 450 and rail 470 while rotating relative to each slider 460 and 480 in the same direction as the rotating plate 300 (clockwise in FIGS. 6 to 10). Thereby, the rotating plate 300 is located at the getting-on/off position. In addition, in this embodiment, the position where the link 410 is rotated 40 degrees from the seating position is set as the getting-on/off position.

In the rotating seat 1 described above, each slider 460, 480 is a point on the circle A2 when the seat body 200 rotates while being inscribed in the virtual circle A1 when the seat body 200 moves from the seating position to the getting on/off position. (diameter of virtual circle A1). Therefore, it is possible to secure the moving distance of the seat body 200 between the seating position and the getting-on/off position. Thereby, the seat body 200 moves to the getting-on/off position while avoiding the pillars 4 located on the sides of the seat body 200 in the seating position.

Furthermore, since each rail 450, 470 of this rotating seat 1 is fixed to the base plate 100, a decrease in rigidity of the connecting unit 400 is suppressed.

Furthermore, in this embodiment, the rotating plate 300 is supported at three points: the rotating end portion 412, the first slider 460, and the second slider 480, so the seat body 200 is stably supported.

(Second embodiment)
Next, a rotary seat 1 according to a second embodiment of the present invention will be described with reference to FIGS. 11 and 12. In the second embodiment, only the parts that are different from the first embodiment will be explained, and the same structure, operation, and effect as the first embodiment will not be repeated.

In this embodiment, the connection unit 400 does not have the second rail 470 and the second slider 480, but further includes an internal gear 491 and an external gear 492.

The internal gear 491 is formed in an arc shape along the virtual circle A1, and is fixed to the base plate 100. The internal gear 491 is arranged between the seat sliders 3.

External gear 492 is a gear that meshes with internal gear 491. The external gear 492 is fixed to the rotating end 412 so as to be rotatable relative to the rotating end 412. The radius of the external gear 492 is set to be the same as the distance between the center B1 and the center B2. External gear 492 is formed into a fan shape.

It will be appreciated by those skilled in the art that the exemplary embodiments described above are specific examples of the following aspects.

The rotating seat in the above embodiment includes a base plate fixed to the floor side, a seat body disposed on the base plate, and a rotating plate fixed to the lower surface of the seat body so as not to rotate relative to the seat body. and the base plate such that the rotary plate is rotatable relative to the base plate between a seating position where the seat body faces the front of the vehicle and an entry/exit position where the seat body faces the door opening of the vehicle. a connection unit that connects the rotation plate, the connection unit includes a link that connects the base plate and the rotation plate, a rail fixed to the base plate, and a slider movable along the rail. and the slider that supports the rotation plate so that the rotation plate can rotate relative to the slider, and the link can rotate relative to the base plate. a fixed end fixed to the base plate; and a fixed end fixed to the rotary plate so as to be rotatable relative to the base plate about the fixed end and rotatable relative to the rotary plate. and a rotating end portion, the rail having a radius twice the distance between the fixed end portion and the rotating end portion, and having a radius of an imaginary circle centered on the fixed end portion. The slider has a shape that extends linearly along a diameter, and the slider moves a portion of the rotating plate that is spaced apart from a portion fixed to the rotating end portion from the seating position to the getting-on/off position. At this time, the rotary plate is moved along the slider while being rotated relative to the slider in the same direction as the rotary plate rotates with respect to the rotary end.

In this rotating seat, the rail has a shape that extends linearly along the diameter of the virtual circle, so that when the seat body moves from the seating position to the getting on/off position, the slider has a fixed end and a rotating part. Move along the locus of the point on the circle (the diameter of the virtual circle) when the circle whose radius is the length between the ends and whose center is the rotating end rotates while being inscribed in the virtual circle. do. Therefore, it is possible to secure the moving distance of the seat body between the seating position and the getting-on/off position. Furthermore, since the rails of this rotary seat are fixed to the base plate, a decrease in the rigidity of the connection unit is suppressed.

Further, the connection unit has a shape that extends linearly along the diameter of the virtual circle, and is movable along another rail fixed to the base plate in a posture intersecting the rail. The slider may further include another slider that supports the rotary plate so that the rotary plate can rotate relative to the other slider.

In this aspect, the rotating plate is supported at three points: the rotating end, the slider, and another slider, so the seat body is stably supported.

Alternatively, the connection unit is formed in an arc shape along the virtual circle, and includes an internal gear fixed to the base plate, and an external gear that meshes with the internal gear, and is rotatable relative to the rotating end. The external gear may be fixed to the rotating end so as to be possible.

Further, it is preferable that the connecting unit further includes a roller fixed to the link so as to be in contact with the upper surface of the base plate and spaced apart from the rotating plate.

In this way, the relative rotation of the link with respect to the base plate becomes smooth.

The connection unit further includes a protrusion that protrudes from the link toward the base plate, and a fixing member fixed to the protrusion, and the base plate includes a movement locus of the protrusion. a through hole having a shape is provided, the protrusion is inserted into the through hole, and the fixing member is fixed to a portion of the protrusion that protrudes downward from the base plate, It is preferable that the protrusion has a shape that comes into contact with a lower surface of the base plate when the protrusion moves upward with respect to the base plate.

In this way, the link is fixed to the base plate at two points, the fixed end and the fixed member, so that when an upward force is applied to the link through the seat body, such as in the event of a frontal collision of the vehicle, the link damage is suppressed.

Note that the embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. The scope of the present invention is indicated by the claims rather than the description of the embodiments described above, and further includes all changes within the meaning and scope equivalent to the claims.

1 rotating seat, 2 floor, 3 seat slider, 4 pillar, 100 base plate, 110 connecting part, 120 through hole, 200 seat body, 300 rotating plate, 310 first supported part, 320 second supported part, 400 connection unit , 410 link, 411 fixed end, 412 rotating end, 420 roller, 432 protrusion, 434 fixed member, 450 first rail (rail), 460 first slider (slider), 470 second rail (other rail) , 480 Second slider (other slider).

Claims (4)

A base plate fixed to the floor side,
a seat body disposed on the base plate;
a rotating plate fixed to the lower surface of the seat body so as not to rotate relative to the seat body;
The base plate and the rotation plate are rotatable with respect to the base plate between a seating position where the seat body faces the front of the vehicle and an entry/exit position where the seat body faces the door opening of the vehicle. A connection unit that connects the plate,
The connection unit is
a link connecting the base plate and the rotating plate;
a rail fixed to the base plate;
a slider movable along the rail, the slider supporting the rotary plate so that the rotary plate can rotate relative to the slider;
The said link is
a fixed end fixed to the base plate so as to be rotatable relative to the base plate;
a rotating end portion that is rotatable relative to the base plate around the fixed end portion and fixed to the rotating plate so as to be rotatable relative to the rotating plate;
The rail has a radius that is twice the distance between the fixed end and the rotating end, and has a shape that extends linearly along the diameter of an imaginary circle centered on the fixed end. death,
The slider is configured to move a portion of the rotary plate away from a portion fixed to the rotary end portion of the rotary plate relative to the rotary end portion when the rotary plate moves from the seating position to the getting-on/off position. moving it along the slider while rotating it relative to the slider in the same direction as the direction in which it rotates ,
The connection unit is
another rail having a shape extending linearly along the diameter of the virtual circle and fixed to the base plate in a posture intersecting the rail;
The other slider is movable along the other rail and supports the rotating plate so that the rotating plate can rotate relative to the other slider. , rotating seat. A base plate fixed to the floor side,
a seat body disposed on the base plate;
a rotating plate fixed to the lower surface of the seat body so as not to rotate relative to the seat body;
The base plate and the rotation plate are rotatable with respect to the base plate between a seating position where the seat body faces the front of the vehicle and an entry/exit position where the seat body faces the door opening of the vehicle. A connection unit that connects the plate,
The connection unit is
a link connecting the base plate and the rotating plate;
a rail fixed to the base plate;
a slider movable along the rail, the slider supporting the rotary plate so that the rotary plate can rotate relative to the slider;
The said link is
a fixed end fixed to the base plate so as to be rotatable relative to the base plate;
a rotating end portion that is rotatable relative to the base plate around the fixed end portion and fixed to the rotating plate so as to be rotatable relative to the rotating plate;
The rail has a radius that is twice the distance between the fixed end and the rotating end, and has a shape that extends linearly along the diameter of an imaginary circle centered on the fixed end. death,
The slider moves a portion of the rotating plate that is spaced apart from a portion fixed to the rotating end portion to the rotating plate when the rotating plate moves from the seating position to the getting on/off position. moving it along the slider while rotating it relative to the slider in the same direction as the direction in which it rotates,
The connection unit is
an internal gear formed in an arc shape along the virtual circle and fixed to the base plate;
A rotating seat further comprising: an external gear that meshes with the internal gear and is fixed to the rotating end so as to be rotatable relative to the rotating end. The rotary seat according to claim 1 or 2 , wherein the connection unit further includes a roller fixed to the link so as to be in contact with the upper surface of the base plate and spaced apart from the rotary plate. The connection unit is
a protrusion that protrudes from the link toward the base plate;
further comprising a fixing member fixed to the protrusion,
The base plate is provided with a through hole having a shape that includes a movement locus of the protrusion,
The protrusion is inserted into the through hole,
The fixing member is fixed to a portion of the protrusion that protrudes downward from the base plate, and has a shape that comes into contact with the lower surface of the base plate when the protrusion moves upward with respect to the base plate. The rotary seat according to any one of claims 1 to 3 .

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