JP4241442B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat for an elderly person or a disabled person to easily get on and off the vehicle.

Conventionally, as this type of seat, for example, as disclosed in JP-A-2002-254969, the seat body can be rotated by about 90 ° between a position facing the front of the vehicle and a position facing the door opening side. What is provided is provided. In addition, this type of rotating seat is provided with a footrest for a seated person to put his / her foot on during a rotating operation. The seated person can change the direction by rotating his / her body integrally with the seat body by rotating the seat body by placing his / her feet on the footrest and floating from the vehicle floor.
However, since the footrest is usually provided so as to protrude forward from the lower part of the seat cushion, when the seat body rotates, it forms the lower edge of the door opening and is positioned in a state of rising from the vehicle floor. The sheet main body cannot be rotated to the position facing the door opening by hitting the step (side sill or locker).
For this reason, the vehicle seat disclosed in the above publication raises the footrest and the occupant's feet to a position higher than the step by tilting the entire seat body in the forward upward direction, and rotates in the tilted state. By doing so, the seat main body is rotated to a position facing the door opening while avoiding the interference of the footrest with the step.
JP 2002-254969 A

As described above, the conventional vehicle seat needs to place a foot on the footrest in such a cramped posture that the seated person holds the leg when rotating the seat body. In addition, in order to avoid the footrest for placing the foot from interfering with the step when the seat body rotates, it is necessary to tilt the seat body backward, and this causes a problem that the structure of the vehicle seat is complicated. It was. By setting the footrest to a position higher than the step in advance, interference with the step of the footrest during rotation can be avoided without tilting the seat body backward, but the footrest is set to a higher position. And the posture of the seated person when he puts his foot becomes tighter.
The present invention has been made in view of this problem, and provides a vehicle seat that allows a seated person to rotate the seat body in an easy posture without tilting the seat body backward as in the prior art. Objective.

For this reason, the present invention provides a vehicle seat having the structure described in each claim.
According to the vehicle seat according to claim 1, the ottoman main body is taken out to the use position in conjunction with the rotational movement of the seat main body, and the leg portion (mainly the calf) of the seated person is lifted from below, and in this state the seat main body Rotates from the position facing the front of the vehicle to the position facing the door opening. Rather than taking a cramped posture by placing a foot on the footrest, the seated person moves to a position where the seated person's foot floats off the vehicle floor when the ottoman body is taken out to the use position and the leg is lifted Therefore, the seated person can take a posture in which the legs and legs are stretched, so that the seated person can change the direction with a more comfortable posture than when the feet are placed on the footrest.
Note that the movement of the ottoman body in conjunction with the rotation operation of the seat body includes not only the simultaneous rotation of the seat body and the movement operation of the ottoman body, but also the ottoman body prior to the rotation operation of the seat body. Includes a configuration in which the rotation operation of the seat body is interrupted and the movement operation of the ottoman body is performed, and then the rotation operation of the seat body is resumed. A configuration in which a moving operation is performed is included.

Further , according to the vehicle seat of the first aspect , the ottoman main body is substantially upright along the front portion of the seat main body in the retracted position, and in the use position, the front of the ottoman main body is directed substantially upward. This is applied to the back of the leg (mainly the calf), and the tilting movement of the ottoman body is performed in conjunction with the movement between the use position and the storage position. And the usability can be improved.
According to the vehicle seat according to claim 1, ottoman body is tilted in a direction to direct the front upward by pulling force of the shielding material. The shielding material is pulled out from the shielding device by the movement of the ottoman body from the storage position to the use position, and this drawing is performed against the spring biasing force. For this reason, the spring biasing force indirectly acts on the ottoman main body through the shielding material, and the ottoman main body tilts in a direction in which the front surface thereof is directed upward.
Conversely, when the ottoman body moves from the use position to the storage position, the shielding material is drawn into the shielding device by the spring biasing force.
According to the vehicle seat of claim 2 , when the ottoman main body reaches the retracted position, the front of the seat main body is moved by the moving operation force (the driving force for moving the ottoman main body to the retracted position or the manual operation force). It is pushed by the part and thereby tilted in the standing direction, and is stored along the front part of the seat body in this standing state. In this way, when the ottoman body is stored, it is stored in a standing state along the front part of the seat body, so that the ottoman body can be compactly stored in a position that does not cause jamming for the seated person without any special operation. Is done.
According to the vehicle seat according to claim 3 , since the ottoman main body is taken out to the use position with the electric motor (ottoman motor) as a drive source and is stored in the storage position, the manual operation type (manual operation type) The usability can be improved compared to).

Next, an embodiment of the present invention will be described. In the illustrated embodiment, in addition to the ottoman device 100 that operates in accordance with the rotation operation of the seat body 10, a tilt-up mechanism that tilts up the seat body 10 when the seat body 10 is moved between the vehicle interior and the exterior is provided. The vehicle seat S is illustrated.
Hereinafter, various types of vehicle seats with a tilt-up mechanism will be described as first to fourth related technologies.
First, FIGS. 1-6 has shown vehicle seat S1 which concerns on a 1st related technique. As illustrated in FIG. 1, the vehicle seat S <b> 1 of the first related technology is illustrated as being applied to the passenger seat of the vehicle M. A door opening D is provided on the left side of the vehicle seat S1. As shown in FIG. 2, the vehicle seat S1 includes a seat body 10 on which an occupant P (hereinafter also referred to as a seated person P) is seated. The seat body 10 includes a seat cushion 11 as a seating surface and a seat back 12 as a backrest. The seat back 12 can be tilted back and forth with respect to the seat cushion 11 for reclining. Armrests 13 and 13 are provided on both sides of the seat back 12. A headrest 14 is provided on the upper portion of the seat back 12. The seat body 10 itself is the same as that conventionally known and does not require any particular change in the related art. An ottoman device 100 is also provided at the front of the seat cushion 11. The ottoman device 100 will be described later.
The seat body 10 is fixed on the seat base 15. The seat base 15 is fixed along the lower surface of the seat cushion 11.
On the other hand, on the vehicle floor F, a longitudinal slide mechanism 20 for moving the seat body 10 in the longitudinal direction of the vehicle (left and right in FIG. 2) and a seating position of the seat body 10 facing the front of the vehicle (solid line in FIG. 1). And a rotation mechanism 30 for rotating about 90 ° between the boarding / alighting position facing the door opening D side.

As shown in FIG. 3, the front / rear slide mechanism 20 includes two slide rails 21, 21 fixed on the vehicle floor F parallel to each other in the vehicle front-rear direction, and both the slide rails 21, 21. A front / rear slide base 22 that moves in the vehicle front-rear direction is provided. A screw shaft 23 is rotatably supported on the vehicle floor F between the slide rails 21 and 21 around the shaft. A nut 24 is engaged with the screw shaft 23. The nut 24 is fixed to the lower surface of the front / rear slide base 22. One end side of the screw shaft 23 is connected to the output shaft of the front / rear slide motor 25. For this reason, when the front / rear slide motor 25 is activated, the screw shaft 23 rotates around the shaft, whereby the nut 24 and thus the front / rear slide base 22 move in the vehicle front-rear direction (a direction perpendicular to the plane of FIG. 3).
The rotating mechanism 30 includes a rotating disc 31 including an outer ring 31a fixed on the front / rear slide base 22, an inner ring 31b coaxially and rotatably mounted on the inner peripheral side of the outer ring 31a, and an inner ring 31b fixed to the lower surface. And a rotation motor 33 mounted on the front / rear slide base 22. The output shaft of the rotary motor 33 is meshed with a gear portion 31c formed on the outer peripheral surface of the inner ring 31b. For this reason, when the rotation motor 33 is activated, the inner ring 31b and thus the rotation base 32 rotate, whereby the seat body 10 rotates between the seating position facing the front of the vehicle and the boarding / alighting position facing the door opening D side.
The operation of the front / rear slide motor 25 of the front / rear slide mechanism 20 and the rotation motor 33 of the rotation mechanism 30 is controlled by the control device C with respect to activation, stop, rotation direction, rotation speed, and the like. In this related technology, the movement of the seat body 10 in the longitudinal direction of the vehicle by the activation of the front and rear slide motor 25 and the rotation of the seat body 10 by the rotation motor 33 are partially linked to each other. Operation is controlled.

Next, a tilt-up mechanism 40 is interposed between the rotation base 32 and the seat body 10. Details of the tilt-up mechanism 40 are shown in FIG. The tilt-up mechanism 40 includes a pair of left and right connecting arms 42, 42 interposed between the rotation base 32 and the seat base 15, and an auxiliary arm 43 supported by the front and rear portions of both the connecting arms 42, 42. , 44, a nut 45 connected between the connecting arms 42, 42 via a connecting shaft 48, a screw shaft 46 with which the nut 45 is engaged, and a tilt-up for rotating the screw shaft 46 about its axis. A motor 47 is provided.
One end side of the screw shaft 46 is supported on the rotation base 32 so as to be rotatable around the axis via a bracket 46a. The other end side of the screw shaft 46 is connected to the output side of a tilt-up motor 47 that is also fixed on the rotation base 32. The tilt-up motor 47 is also controlled by the control device C in its starting / stopping, rotation direction, rotation speed, and the like.
A connecting block 49 is attached to the nut 45. The connecting block 49 is formed with a connecting hole 49a having a long slot shape in the vertical direction. The connecting shaft 48 is inserted into the connecting hole 49a so as to be vertically displaceable and rotatable.
The left and right connecting arms 42, 42 are connected to the H shape by the connecting shaft 48 at the substantially central portion in the longitudinal direction. When the tilt-up motor 47 is activated and the screw shaft 46 rotates about the axis, the nut 45 moves in the axial direction of the screw shaft 46 (the front-rear direction as viewed from the seated person P). , 42 move together in the front-rear direction while displacing the front-rear part thereof.

The left and right front auxiliary arms 43 and 43 are connected to the front portion of the seat base 15 via a support shaft 43a so as to be pivotable up and down, and are vertically connected to the front portion of the rotation base 32 via a support shaft 43b. It is connected so that it can rotate. The support shaft 43 a is rotatably supported by the front connection hole 15 a of the seat base 15, and the support shaft 43 b is rotatably supported by the front support hole 32 a of the rotation base 32. Further, the front portions of the connecting arms 42 are connected to the front auxiliary arms 43 and 43 through the support shaft 43c so as to be vertically rotatable.
On the other hand, the left and right rear auxiliary arms 44, 44 are connected to the rear portion of the seat base 15 via a support shaft 44a so as to be vertically rotatable, and are respectively connected to the rear portion of the rotation base 32 via a support shaft 44b. It is connected to the pivotable. The support shaft 44a is rotatably supported in the connection hole 15b on the rear side of the seat base 15, and the support shaft 44b is rotatably supported on the support hole 32b on the rear side of the rotation base 32. The connecting hole 15b on the rear side of the seat base 15 is formed in a long slot shape that is long in the front-rear direction. By moving the support shaft 44a in the connecting hole 15b, the rear auxiliary arm 44 is connected to the seat base 15 so as to be displaceable back and forth. Further, the rear portions of the connecting arm 42 are connected to the rear auxiliary arms 44, 44 via a support shaft 44c so as to be vertically rotatable.
The mutual positions of the respective support shafts 43a, 43b, 43c in the front auxiliary arm 43 are set so that the support shaft 43a moves downward when the support shaft 43c moves rearward. The mutual positions of the respective support shafts 44a, 44b, 44c in the rear auxiliary arm 44 are set such that the support shaft 44a moves upward when the support shaft 44c moves rearward.

When the tilt-up motor 47 is activated to the tilt-up side, the screw shaft 46 rotates, and the nut 45 and thus the connecting arms 42 and 42 move rearward as viewed from the seated person while tilting up and down around the connecting shaft 48. . When the connecting arms 42 and 42 move to the rear side, the front auxiliary arms 43 and 43 rotate in the counterclockwise direction around the support shaft 43b, respectively, and the rear auxiliary arms 44 and 44 respectively rotate the support shaft 44b. It rotates in the counterclockwise direction shown in the figure. When the front auxiliary arms 43 and 43 rotate counterclockwise in the figure, the support shafts 43a and 43a are displaced downward, and when the rear auxiliary arms 44 and 44 rotate counterclockwise in the figure, the support shafts 44a and 44a As a result, the seat base 15 is displaced in the direction in which the front side is displaced downward, while the rear side is displaced in the upward direction. As a result, the seat body 10 is tilted up.
In this specification, “tilt up” is used to mean that the seat body 10 is inclined in a direction in which the rear side of the seat cushion 11 is higher than the front side. Further, the operation in the reverse direction to the tilt up and returning the seat cushion to the horizontal position is referred to as “tilt down”. FIG. 5 shows a state where the seat body 10 is tilted down, and FIG. 6 shows a state where the seat body 10 is tilted up.
Further, the seat base 15, the rotation base 32, and the connecting arm are tilted up so that the seat body 10 moves in an arc around a virtual center set at the hip point HP or a position near the hip point HP (near the waist of the seated person P). The relative positions of the respective connection points with respect to the auxiliary arms 43 and 44 before and after 42 (the mutual positional relationship between the support shafts 43a, 43b, 43c, 44a, 44b, and 44c) are set.
Since the seat body 10 is tilted up with the hip point HP as a virtual center in this way, the movement of the seated person P (weight shift) is extremely small, and as a result, the instability of the seated person P at the time of tilting up is extremely small. It has become. In this regard, for example, in the case of a configuration in which the seat base is tilted up around the front portion of the seat base, the hip point HP moves greatly, so that the weight shift of the seat occupant P during tilt-up is large. A sense of stability increases.

The vehicle seat S1 according to the first related technology configured as described above operates as follows when the passenger P gets on and off the vehicle M. First, as shown in FIGS. 1 to 3, in a state where the seat body 10 is located at the seating position (a state where the seat body 10 is not tilted up), the front / rear slide motor 25 is activated, whereby the screw shaft 23 rotates and the slide base is rotated. 22 moves to the front side of the vehicle. During the movement of the slide base 22 toward the front side of the vehicle, the rotation motor 33 is activated, whereby the rotation base 32 and thus the seat body 10 rotate about 90 ° from the seating position facing the front of the vehicle to the door opening D side while moving forward. Move to. Accordingly, the seat body 10 can be efficiently rotated toward the door opening D side in a limited space without the legs of the seated person P seated on the vehicle seat S1 interfering with the front pillar, for example. it can.
FIG. 5 shows a state where the seat body 10 has been rotated to the boarding / alighting position facing the door opening D and has not yet been tilted up. In this state, the seat cushion 11 and the seat base 15 are positioned substantially horizontally.
When the tilt-up motor 47 is activated to the tilt-up side in this tilt-down state, as shown in FIG. 6, the screw shaft 46 rotates around that axis, so that the nut 45 is seen from the rear side (right side in FIG. 6). In this stage, the left and right connecting arms 42 and 42 move back and forth while swinging up and down.
When the connecting arm 42 moves to the rear side, the front auxiliary arm 43 rotates about the support shaft 43b in the counterclockwise direction shown in the figure, and the rear auxiliary arm 43 also rotates about the support shaft 44b. It rotates counterclockwise in the figure.
The front auxiliary arms 43 and 43 are respectively rotated counterclockwise around the support shaft 43b, whereby the support shafts 43a and 43a are respectively displaced downward, whereby the seat base 15 and the front of the seat body 10 are thereby moved. The side is displaced downward. Further, the rear side auxiliary arms 44 and 44 are respectively rotated in the counterclockwise direction in the drawing around the support shaft 44b, so that the support shafts 44a and 44a are respectively displaced upward, thereby the seat base 15 and the seat body. The rear side of 10 is displaced upward.
In this way, while the front side of the seat cushion 11 is displaced downward, the rear side is displaced upward, and the seat body 10 is tilted up in the forward turning direction. In this case, as described above, the seat body 10 is tilted up around the hip point HP.

Since the seat main body 10 is tilted up in this manner, the seated person P can easily stand up, so that the passenger can get off the vehicle M easily.
On the contrary, when getting on, the seated person P can easily sit on the seat body 10 by tilting up the seat body 10 as described above. That is, the seated person P can be seated by tilting down the seat body 10 by depositing his / her body on the seat body 10 tilted up and rotating the tilt-up motor 47 in the reverse state. In this case, since the seat body 10 is tilted down around the hip point HP or the vicinity thereof, the seat occupant's weight shift is small, and therefore the instability of the seat occupant is small.
After the seat body 10 is returned to the horizontal position as shown in FIG. 5, the seat body 10 is directed to the seating position facing the front of the vehicle by starting the rotation motor 33 and the front / rear slide motor 25 under the control of the control device C. The seat body 10 can be returned to a predetermined position in the passenger compartment without the legs of the seated person P interfering with the body of the vehicle M (for example, the front pillar). . During this time, the seated person P can sit in the sitting position facing the front of the vehicle while sitting.
According to the vehicle seat S1 of the first related technology configured as described above, the seat body 10 is tilted up around the hip point HP or the vicinity thereof in a state where the seat body 10 is directed to the door opening D side. Alternatively, since the tilt is lowered, the weight shift of the occupant P can be made significantly smaller than before, and the instability of the occupant P can be reduced.
Further, since the tilt-up motor 47 is configured to be tilted up and tilted down as a drive source, the tilt-up and tilt-down operations can be performed in the forward / backward slide operation and the rotation operation by appropriately controlling the tilt-up motor 47 by the control device C. Both down operations can be linked, and in this respect, the vehicle seat S1 can be easily used.

Next, various changes can be made to the vehicle seat S1 according to the first related art exemplified above. The vehicle seat S2 according to the second related technology described below is characterized by a modified configuration of the tilt-up mechanism 40, and the other configurations are the same as the vehicle seat S1 of the first related technology. Therefore, the same reference numerals are used in the figure and the description thereof is omitted.
7 and 8 show a tilt-up mechanism 50 obtained by changing the tilt-up mechanism 40, and FIGS. 9 to 11 show a vehicle seat S2 of the second related technology provided with the tilt-up mechanism 50. FIG. . The tilt-up mechanism 50 includes a pair of left and right connecting arms 53 and 53 interposed between the rotation base 51 and the seat base 52, and auxiliary arms 54 supported on the front and rear portions of the both connecting arms 53 and 53, respectively. 55, a nut 57 supported between the connecting arms 53, 53 via support shafts 56, 56, a screw shaft 58 meshed with the nut 57, and a tilt for rotating the screw shaft 58 about the axis. An up motor 59 is provided. The nut 57, the screw shaft 58, and the tilt up motor 59 constitute a drive device for the tilt up mechanism 50 (tilt up drive device 50K).
Support shafts 56 are spanned between both side portions of the nut 57 and the connecting arms 53, 53. Both support shafts 56 and 56 are coaxially attached to each other. The nut 57 is supported so as to be rotatable up and down around the axis of the support shafts 56 and 56.
The left and right front auxiliary arms 54 and 54 are pivotally connected to the front portion of the seat base 52 via a support shaft 54a, respectively, and are vertically connected to the front portion of the rotation base 51 via a support shaft 54b. It is connected so that it can rotate. The support shaft 54 a is rotatably supported by the front connection hole 52 a of the seat base 52, and the support shaft 54 b is rotatably supported by the front support hole 51 a of the rotation base 51. Further, the front portions of the connecting arms 53 are connected to the front auxiliary arms 54 and 54 via the support shaft 54c so as to be vertically rotatable.

On the other hand, the left and right rear auxiliary arms 55 and 55 are connected to the rear portion of the seat base 52 via a support shaft 55a so as to be vertically rotatable, and are respectively connected to the rear portion of the rotary base 51 via a support shaft 55b. It is connected to the pivotable. The connecting hole 52b on the seat base 52 side through which the rear support shaft 55a is inserted is formed in a slot shape that is long in the front-rear direction as viewed from the seated person. For this reason, the support shaft 55a and the rear auxiliary arms 55 and 55 are connected to the seat base 52 so as to be movable in the front-rear direction. The support shaft 55b is rotatably supported in the support hole 51b on the rear side of the rotation base 51. Further, the rear portions of the connecting arm 53 are connected to both the rear auxiliary arms 55, 55 via a support shaft 55c so as to be rotatable up and down.
The mutual positions of the support shafts 54a, 54b, 54c in the front auxiliary arm 54 are set such that the support shaft 54a moves downward when the support shaft 54c moves rearward. The mutual positions of the respective support shafts 55a, 55b, and 55c in the rear auxiliary arm 55 are set such that the support shaft 55a moves upward when the support shaft 55c moves rearward.
The tilt-up drive device 50K is attached to the tilt bracket 59a. The tilt bracket 59a is supported on the rear portion of the rotation base 51 via a support shaft 59b so as to be tiltable up and down. Therefore, the tilt-up drive device 50K is supported so as to be tiltable up and down around the support shaft 59b. The screw shaft 58 is incorporated into the tilt-up motor 59 and unitized. When the tilt-up motor 59 is activated, the screw shaft 58 rotates forward or reverse around the axis. Further, when the tilting bracket 59a tilts up and down around the support shaft 59b, the screw shaft 58 tilts in the direction in which the tip end side is displaced up and down.
The tilt-up motor 59 is also controlled by the control device C for its start / stop, rotation direction, rotation speed, and the like.

When the tilt-up motor 59 is activated to the tilt-up side, the screw shaft 58 rotates and the nut 57 and thus the connecting arms 53 and 53 move rearward as viewed from the seated person. When the connecting arms 53, 53 move to the rear side, the front auxiliary arms 54, 54 rotate in the counterclockwise direction around the support shaft 54b, respectively, and the rear auxiliary arms 55, 55 respectively rotate the support shaft 55b. It rotates in the counterclockwise direction shown in the figure. When the front auxiliary arms 54 and 54 rotate in the counterclockwise direction shown in the figure, the support shafts 54a and 54a are displaced downward, and when the rear auxiliary arms 55 and 55 rotate in the counterclockwise direction shown in the figure, the support shafts 55a and 55a are moved. As a result, the seat base 52 is displaced in the direction in which the front side thereof is displaced downward, while the rear side thereof is displaced upward, whereby the seat body 10 is tilted up.
As in the first related art, the seat base 52, the rotation base 51, and the connecting arms 53, 53 are tilted up and down so that the seat base 10 moves in an arc with the hip point HP or its vicinity as a virtual center. The relative positions of the connection points with respect to the front and rear auxiliary arms 54 and 55 (the mutual positional relationship between the support shafts 54a, 54b, 54c, 55a, 55b, and 55c) are set.
Also with the vehicle seat S2 of the second related technology configured as described above, the seat body 10 is tilted up and down around the hip point HP of the seat body 10 or the vicinity thereof. It is possible to reduce the sense of instability of the seated person P by reducing the weight shift of the seated person P at the time of up and tilting down than before.
Various modifications can be made to the first and second related technologies described above. For example, the configuration in which the connection holes 15b and 52b on the rear side of the seat bases 15 and 52 are formed in a long groove hole shape is exemplified. Instead, the front connection holes 15a and 52a are formed in a long groove hole shape on the front and rear sides. The front auxiliary arms 43 and 54 may be configured to be displaceable back and forth with respect to the seat bases 15 and 52.

Further changes can be made to the tilt-up mechanisms 40, 50 in the vehicle seats S1, S2 of the first and second related technologies. FIG. 12 shows a tilt-up mechanism 70 in the vehicle seat S3 of the third related technology. About the structure similar to each said related technology, the description is abbreviate | omitted using a code | symbol of a peer. Unlike the first related technology, the tilt-up mechanism 70 according to the third related technology has a nut 45 attached directly to the connecting arm 42. Further, the tilt-up mechanism 70 of the third related technology is different from the second related technology in that the tilt-up driving device 70K is installed on the rotation base 32 and does not tilt up and down.
In this third related technology, the nut 45 engaged with the screw shaft 46 is fixed to a connecting rod 71 fixed in a spanning manner between the left and right connecting arms 72, 72. For this reason, the left and right connecting arms 72 and 72 are integrated with the nut 45 and translated back and forth, and therefore, do not tilt up and down unlike the first and second related technologies.
The connecting arms 72, 72 are interposed between the rotary base 32 and the seat base 75 via auxiliary arms 73, 74 connected to the front and rear of the connecting arms 72, 72, respectively. A front auxiliary arm 73 is connected to the front portion of the connecting arm 72 via a support shaft 73c so as to be vertically rotatable. The connection hole 73d of the front auxiliary arm 73, through which the support shaft 73c is inserted, is formed in a long slot shape that is long in the vertical direction in FIG.
The front auxiliary arm 73 is connected to the front portion of the seat base 75 via a support shaft 73a so as to be vertically rotatable. The support shaft 73 a is inserted through a connection hole 75 a provided in the front portion of the seat base 75. The connecting hole 75a is formed in a long slot shape that is long in the front and rear direction. Therefore, the front auxiliary arm 73 can be displaced back and forth with respect to the seat base 75 by the support shaft 73a moving in the connecting hole 75a.
An auxiliary arm 74 is connected to the rear side of the connecting arm 72 via a support shaft 74c so as to be rotatable up and down. The support shaft 74c is inserted through the connecting hole 74d of the rear auxiliary arm 74. The connection hole 74d is also formed in a long slot shape that is long in the vertical direction in FIG. For this reason, when the support shaft 74c moves in the connection hole 74d, the displacement of the connection fulcrum (support shaft 74c) with respect to the auxiliary arm 74 on the rear side of the connection arm 72 is allowed. Further, the auxiliary arm 74 on the rear side is connected to the rear portion of the seat base 75 so that the support shaft 74a is inserted into the circular connection hole 75b so as to be vertically rotatable. The rear auxiliary arm 74 has a support shaft 74b rotatably inserted into the circular support hole 32b and is supported by the rear portion of the rotation base 32 so as to be vertically rotatable.
The tilt-up motor 47 of the tilt-up driving device 70K is controlled by the control device as in the related arts. The rotation base 32 is supported by the front / rear slide mechanism 20 and the rotation mechanism 30 so as to be movable in the front / rear direction of the vehicle M and to be horizontally rotatable.

According to the tilt-up mechanism 70 in the vehicle seat S3 of the third related technology configured as described above, when the tilt-up motor 47 is activated and the screw shaft 46 rotates, the nut 45 is located on the rear side (right side in FIG. 12). Move to. When the nut 45 moves rearward, the connecting arm 72 moves rearward together with the nut 45. When the connecting arm 72 moves rearward, the front auxiliary arm 73 rotates about the support shaft 73b in the counterclockwise direction in the drawing, and thereby the front portion of the seat body 10 is displaced downward.
Further, when the connecting arm 72 moves rearward, the rear auxiliary arm 72 rotates in the same counterclockwise direction around the support shaft 74b, and thereby the rear portion of the seat body 10 is displaced upward. As described above, also in the third related technology, the seat body 10 is tilted up in such a direction that the front portion is displaced downward and the rear portion is displaced upward with the hip point HP as the center. As in the first related art, in the auxiliary arms 73 and 74, the relative positions of the respective support shafts 73a, 73b, 73c, 74a, 74b, and 74c are appropriately set so as to obtain such a tilt-up operation.
In the case of the third related technique, the connecting arm 72 translates in the front-rear direction (longitudinal direction) and does not move up and down, but the front support shaft 73c is inserted into the connecting holes 72a and 73d formed in the long groove shape, respectively. The support shaft 73a is inserted into a connecting hole 75a formed in a long slot shape that is long in the front-rear direction, and the rear support shaft 74c is inserted into the long groove hole 74d, thereby rotating the front and rear auxiliary arms 73, 74. Accordingly, the tilting operation of the seat base 75 is allowed.
Various changes can be made to the vehicle seat S3 of the third related technology. For example, the front side connecting hole 75a of the seat base 75 is illustrated as having a long slot shape, but instead, the rear side connecting hole 75b is formed in a long slot shape that is long in the front and rear, and the rear side auxiliary hole is formed. The arm 74 may be configured to be displaceable back and forth with respect to the seat base 75.

Next, FIGS. 13 and 14 show a vehicle seat S4 provided with a tilt-up mechanism 60 of the fourth related technology. Similar to the first to third related technologies, the rotation base 61 is attached to the inner ring 31 b of the turntable 31. Arc guide rails 62 are attached to the left and right side wall portions 61a and 61a of the rotation base 61 symmetrically. Both guide rails 62, 62 are both attached in a convex direction downward. Both guide rails 62 and 62 are attached within a certain angular range along a circumference centered on the hip point HP of the seat body 10. The two guide rails 62, 62 are slidably assembled with two movable block bodies 63, 63 attached to the left and right side wall portions 65a, 65a of the seat base 65, respectively. The moving block bodies 63 to 63 are assembled to the guide rails 62 and 62 with sufficient strength to receive the weight of the seated person and the weight of the seat body 10, respectively.
An arc-shaped tilt-up gear 64 (sector gear) is attached to one side wall portion 65a of the seat base 65. The tilt up gear 64 is attached along a circumference centered on the hip point HP. On the other hand, a tilt-up motor 66 is attached to one side wall portion of the rotation base 61. A drive gear 67 is attached to the output shaft of the tilt up motor 66. The drive gear 67 is meshed with the tilt up gear 64.
According to the tilt-up mechanism 60 of the fourth related technology configured as described above, when the tilt-up motor 66 is activated to the tilt-up side and the drive gear 67 rotates in the tilt-down state shown in FIG. Moves counterclockwise in the figure along the circumference centered on the hip point HP, whereby the seat body 10 is tilted up counterclockwise in the figure with the hip point HP as a virtual center. FIG. 14 shows a state where the seat body 10 is tilted up.
In the tilt-up state shown in FIG. 14, when the tilt-up motor 66 is activated to the tilt-down side, the drive gear 67 is reversely rotated and the tilt-up gear 64 is moved in the clockwise direction as shown in FIG. It is tilted down by rotating in the clockwise direction as shown in the figure.
As described above, the tilt-up mechanism 60 of the fourth related technique also tilts up and down with the hip point HP as the center, so that when the tilt-up and tilt-down is performed as in the first related technique. Instability can be eliminated by reducing the weight shift of the seated person.

Next, the ottoman device 100 according to the present invention can be added to the vehicle seats S1 to S4 of the first to fourth related technologies. FIG. 15 shows a vehicle seat S5 in which the electric ottoman device 100 is added to the vehicle seat S1 according to the first related technology. Since the configuration other than the ottoman device 100 is as described in the related art, the same reference numerals are used in the figure and the description thereof is omitted.
The ottoman device 100 is attached to the seat base 15. Details of the ottoman device 100 are shown in FIG. The ottoman device 100 includes an ottoman base 101. The ottoman base 101 is fixed along the lower surface of the seat base 15 via brackets 102 to 102. Two guide rails 103, 103 are attached to the lower surface of the ottoman base 101 in parallel with each other along the front-rear direction of the seat body 10. One rack 104 is attached to both guide rails 103, 103 via two moving bodies 105, 105, respectively. Therefore, the two racks 104 are provided so as to be movable along the front-rear direction of the seat body 10 in parallel and integrally with each other at a constant interval.
A pinion gear 106 is engaged with each of the two racks 104 and 104. The pinion gears 106 and 106 are attached to the output shaft of the ottoman motor 107. The ottoman motor 107 is attached to the ottoman base 101. For this reason, when the ottoman motor 107 is started, the pinion gears 106 and 106 rotate together, whereby the two racks 104 and 104 move together. The start, stop, rotation direction, rotation speed, and the like of the ottoman motor 107 are controlled by the control device as in the motors 25 and 33.
An ottoman body 110 having a generally flat plate shape is supported at the tips of the two racks 104 and 104. The ottoman main body 110 is for allowing the seated person P to sit in a more relaxed posture mainly by placing the legs near the calf. A back plate 110b for maintaining a flat plate shape is provided on the side. Two support bracket portions 110c and 110c are provided slightly below the back plate 110b. Each of the two support bracket portions 110c and 110c is connected to the front end portion of the rack 104 through a support shaft 111 so as to be tiltable up and down, and the ottoman body 110 is supported at the front end of the racks 104 and 104 so as to tilt up and down. Has been.
A shielding device 120 is attached to the upper surface of the ottoman base 101. The shielding device 120 is a device in which a shielding material 121 having a certain width of flexibility is drawn out and housed so as to be retractable. The shielding material 121 is urged in a retracting direction by a spring (not shown). The front end side of the shielding material 121 is a back plate 110b of the ottoman main body 110 and is connected to the upper side of the support brackets 110c and 110c. For this reason, the ottoman main body 110 is indirectly spring-biased (hereinafter referred to as “retraction force”) in the retracting direction of the shielding material 121 (clockwise direction in the drawing).
In the present embodiment, a flexible sheet material is used as the shielding material 121. As the shielding device 120, a winding device having a winding core that is spring-biased in the winding direction by a torsion spring and connected to the trailing end side of the sheet material is used.

According to the vehicle seat S5 of the present embodiment configured as described above, the ottoman motor 107 is stopped in a state where the seat body 10 is positioned at the seating position facing the front of the vehicle (sitting state when the vehicle is traveling). The racks 104 and 104 are located on the rearmost side (right side in FIG. 16). Accordingly, the legs of the seated person P are placed on the floor of the vehicle M or a footrest (not shown). In this sitting state, the ottoman main body 110 is moved to the rearmost side, and in this state, the ottoman main body 110 is stored in a substantially upright state along the front surface of the seat main body 10 (seat cushion 11). FIG. 16 shows the stored state of the ottoman device 100 (when not in use).
The illustrated ottoman device 100 has mainly two types of usage. One is used when getting on and off the vehicle, and the other is used when the vehicle is running or normally seated. The vehicle seat used in the former usage pattern corresponds to an embodiment of the invention described in claim 1 of the claims.
First, the former form of use will be described. When getting off from the seating state of the seat body, as described above, the front / rear slide motor 25 and the rotation motor 33 are activated and the seat body 10 is moved from the seating position facing the front of the vehicle to the door. The vehicle moves forward while rotating to the opening D side. The ottoman motor 107 is started almost simultaneously with the start of the rotation of the seat body 10 or at an appropriate stage thereafter. When the ottoman motor 107 is activated, the racks 104 and 104 move forward and the ottoman main body 110 is taken out forward of the seat main body 10.
As shown in FIG. 17, when the ottoman main body 110 starts to move forward, the shielding member 121 is spring-biased in the retracting direction, so that it is above the support brackets 110c and 110c (the tilting center of the ottoman main body 110). The side is pulled by the pulling force of the shielding member 121 and is tilted in a direction in which the upper side is displaced to the rear side rather than the lower side (a direction in which the front cushion portion 110a is on the upper surface side, a clockwise direction in FIG. 17).
As the ottoman body 110 moves further forward while falling down as described above, the shielding material 121 is pulled out. When the ottoman main body 110 is taken out toward the use position while pulling out the shielding material 121, the leg portion (mainly below the knee) of the seated person P is lifted upward by the ottoman main body 110. FIG. 17 shows this state.

In this way, the leg portion of the seated person P is lifted by the ottoman main body 110, and the seat main body 10 is directed to the door opening D side in a state where the feet are lifted from the vehicle floor F. For this reason, as shown in FIG. 17, the seated person P can move his / her feet to a position outside the passenger compartment beyond the vehicle step SP without being aware of it or operating himself / herself.
Thereafter, as described above, the seat main body 10 is tilted in the forward turning direction by the operation of the tilt-up mechanism 40, so that the seated person P can easily get off the seat main body 10 without getting up. it can.
After the occupant P gets off, the tilt-up mechanism 40 operates to the tilt-down side, and then the seat body 10 is returned from the getting-on / off position facing the door opening D to the seating position facing the front of the vehicle, When the ottoman motor 107 is started in the reverse rotation direction, the racks 104 and 104 are moved to the rear side of the seat body 10, and thereby the ottoman body 110 is returned to the rear side. When the ottoman body 110 is returned, the shielding member 121 is automatically pulled in by the pulling force of the shielding device 120.
When the racks 104 and 104 are returned to the retracted end, the ottoman main body 110 is rotated in the upright direction again by the upper portion of the ottoman main body 110 coming into contact with the front surface of the seat cushion 11 due to the moving operation force of the ottoman main body 110. 10 is stored in a storage position (position shown in FIG. 16) substantially along the front surface.
Next, the usage pattern of the ottoman device 100 when the vehicle is traveling or sitting will be described. In this case, the ottoman device 100 is operated independently without operating the front / rear slide mechanism 20, the rotation mechanism 30, and the tilt-up mechanism 40. Take usage form. That is, when the ottoman motor 107 is started while the seat body 10 is located at the seating position facing the front of the vehicle, the racks 104 and 104 are moved forward and the ottoman body 110 is taken out forward of the seat body 10 as described above. . When the ottoman main body 110 starts to move forward, the ottoman main body 110 is automatically tilted in a direction in which the cushion portion 110a on the front side faces the upper surface side by the urging force in the retracting direction of the shielding material 121.
After the ottoman main body 110 is automatically tilted to a position where the front face is directed upward, the ottoman main body 110 moves further forward, whereby the shielding material 121 is pulled out. When the ottoman main body 110 is taken out toward the use position while pulling out the shielding material 121, the leg portion (mainly below the knee) of the seated person P is lifted upward by the ottoman main body 110.
Thus, the leg portion of the seated person P can be lifted by the ottoman main body 110 and can be seated in an easy posture with the feet raised from the vehicle floor F. In this case, the seated person can take the most comfortable posture lying down almost horizontally by tilting the seat back 12 backward.
In the case of storing the ottoman device 100, the ottoman motor 107 is rotated in the reverse direction to move the racks 104, 104 to the rear side of the seat body 10 as described above, thereby returning the ottoman body 110 to the seat body 10 side. When the ottoman body 110 is returned, the shielding member 121 is automatically pulled in by the pulling force of the shielding device 120. As a result, immediately before the racks 104 and 104 are returned to the retracted end, the upper portion of the ottoman main body 110 abuts against the front portion of the seat main body 10 and is further returned in this abutting state, whereby the ottoman main body 110 is returned to the front side. The cushion portion 110a is tilted from a posture facing upward to a posture facing forward, and is stored along the front portion of the seat body 10 in this posture.

As described above, according to the vehicle seat S5 of the present embodiment, the ottoman main body 110 is taken out to the use position in conjunction with the rotation operation of the seat main body 10, and the leg portion (mainly below the knee) of the seated person P. Is lifted from below, and the seat body 10 rotates in this state. Since the ottoman body 110 lifts the lower part of the occupant's leg and below the knee, the occupant can take an easy posture with the knees stretched, and therefore, when the conventional foot is placed on the footrest. There is no need to take a cramped posture.
Further, since the use position of the ottoman main body 110 is set to a height at which the seat occupant is lifted below the knee, even when the ottoman main body 110 is taken out to the use position when the seat main body 10 is rotated, the ottoman main body 110 is used. 110 does not interfere with the vehicle step SP. Therefore, the seat body 10 can be rotated to the door opening D side by rotating horizontally without changing the seat body 10 backward as in the prior art.
Further, when the ottoman main body 110 is taken out to the use position, the shielding material 121 is pulled out, and the surroundings of the racks 104 and 104 and the support brackets 110c and 110c are shielded by the shielding material 121, so that the appearance is improved. In addition, the clothes of the seated person are not bitten into the rack 104, and the lubricating oil of the rack 104 and the support bracket 110 is prevented from adhering to the clothes.
The ottoman device 100 described above can be similarly applied not only to the vehicle seat S1 according to the first related technology but also to the vehicle seats S2 to S4 according to the second to fourth related technologies.
The illustrated ottoman device 100 can also be applied to a vehicle seat that does not include the tilt-up mechanisms 40, 50, 60 and the front-rear slide mechanism 20.
In addition, when the ottoman device 100 is used in combination with, for example, a reclining mechanism for a vehicle seat, the vehicle seat can be used as a simple vehicle-mounted bed, so that it does not rotate and does not tilt up. Even when applied to the above, it can be used as an ottoman device that is more convenient than the conventional one.
Further, the configuration in which the shielding device 120 is attached to the ottoman base 101 and the tip of the shielding material 121 is connected to the ottoman main body 110 is illustrated, but conversely, the shielding device 120 is attached to the ottoman body side and the tip of the shielding material 121 is It is good also as a structure connected with the ottoman base 101 side or the sheet | seat main body 10 side.

In addition, a configuration in which a flexible sheet material is used as the shielding material of the ottoman device and a winding device capable of winding and feeding the sheet material as the shielding device is illustrated, but the flexibility is used instead of the sheet material. It is also possible to use a flat plate that does not have as a shielding material and that can be drawn out and retracted instead of a winding device as a shielding device. Moreover, what connected two or more small pieces which do not have flexibility can also be used as a shielding material. In this case, the winding device can be used as a shielding device.
When a flexible sheet material is used as the shielding material, a roll-up curtain device called a so-called roll curtain, or an equivalent device may be used .
Also, in the illustrated embodiment and the related technology, it has been illustrated a structure for tilting up the seat body 10 around the hip point HP, tilting center (tilting up the center) of the seat body 10 is strictly hip point In addition to the configuration set to HP, a configuration centering on one point within a certain range near the hip point HP may be used. In short, when tilting up and down, the hip point HP does not change the body weight of the seated person P and tilts around the waist so that the seated person P can feel a sense of stability and security. Alternatively, the tilt-up center may be set in a certain range around it.
Further, although not included in the invention described in each of the claims, the shielding device 120 can be eliminated. In this case, for example, a link mechanism may be interposed between the ottoman body and the rack, and the ottoman body may be tilted in conjunction with the movement distance of the rack.
Further, by interposing the shielding device 120 and the shielding material biased by the spring in the retracting direction, the ottoman body 110 is moved up and down in conjunction with the movement operation between the use position and the storage position of the ottoman body 110. The configuration for tilting is exemplified, but the means for linking the tilting operation of the ottoman body is not limited to this, and for example, an electric motor is incorporated in the tilting support portion for the racks 104 and 104 of the ottoman body, and this electric motor is driven. The power source may be configured to tilt up and down, and the tilting electric motor and the Ottoman motor 107 may be linked together by appropriately synchronizing control. This configuration is not included in the invention described in each claim.

It is a figure which shows the technique relevant to this invention, Comprising: It is a plane schematic diagram of the vehicle which has arrange | positioned the vehicle seat in a passenger seat position. It is a side view of the vehicle seat which concerns on the 1st related technique of this invention. It is the figure which looked at the vehicle seat of the 1st related technology from the back of a seated person. This figure shows a state in which the seat body is located at a seating position facing the front of the vehicle. It is a disassembled side view of the tilt up mechanism in the vehicle seat of the first related technology. It is a side view of the vehicle seat of the 1st related art. This figure shows a state where the seat body is tilted down. It is a side view of the vehicle seat of the 1st related art. This figure shows a state where the seat body is tilted up. It is a disassembled side view of the tilt up mechanism in the vehicle seat of the second related technology. It is a side view mainly of the drive system of the tilt up mechanism in the vehicle seat of the second related technology. It is the figure which looked at the vehicle seat of 2nd related technology from the back of the seated person. This figure shows a state in which the seat body is located at a seating position facing the front of the vehicle. It is a side view of the vehicle seat of the 2nd related technology. This figure shows a state where the seat body is tilted down. It is a side view of the vehicle seat of the 2nd related technology. This figure shows a state where the seat body is tilted up. It is a disassembled side view of the tilt up mechanism in the vehicle seat of 3rd related technology. It is a side view of the vehicle seat of the 4th related technology. This figure shows a state where the seat body is tilted down. It is a side view of the vehicle seat of the 4th related technology. This figure shows a state where the seat body is tilted up. 1 is a side view of a vehicle seat according to an embodiment of the present invention. This figure shows a state in which the seat body is located at a seating position facing the front of the vehicle. It is a side view showing an ottoman device in a vehicular seat concerning an embodiment of the present invention. This figure shows the stored state of the ottoman body. It is a side view showing an ottoman device in a vehicular seat concerning an embodiment of the present invention. This figure has shown the taking-out state of the ottoman main body.

Explanation of symbols

M ... Vehicle, D ... Door opening, F ... Vehicle floor SP ... Step P ... Seated person S1-S5 ... Vehicle seat 10 ... Seat body 15 ... Seat base 20 ... Front and rear slide mechanism 30 ... Rotating mechanism 40 ... Tilt-up mechanism DESCRIPTION OF SYMBOLS 50 ... Tilt up mechanism 50K ... Tilt up drive device 60 ... Tilt up mechanism 70 ... Tilt up mechanism 70K ... Tilt up drive device 100 ... Ottoman device 101 ... Ottoman base 104 ... Rack 106 ... Pinion gear 107 ... Ottoman motor 110 ... Ottoman main body 110a ... Cushion part, 110b ... Back plate, 110c ... Support bracket 120 ... Shielding device 121 ... Shielding material

Claims (3)

The seat body can be rotated between a seating position facing the front of the vehicle and a boarding / alighting position facing the door opening, and the ottoman body for the seated person to put the legs on can be taken out to the use position and stored. A vehicle seat equipped with an ottoman device that can be stored in the vehicle,
The ottoman body is taken out to the use position in conjunction with the rotation operation of the seat body toward the getting-on / off position, and is stored in the storage position in conjunction with the rotation operation of the seat body toward the seating position. It is, when taken out Previous Symbol use position while being tilted in a direction to direct the front upwards, is tilted the front and are stored into said storage position in a direction of standing toward the front,
The ottoman main body is provided with a shielding device on the seat main body side having a shielding material connected to the ottoman main body on the leading end side of the ottoman main body, and being urged in the pulling direction, and using the spring urging force of the shielding material. There ottoman device for a seat for a vehicle where the structure is tilted when taken into the use position in a direction to direct the front upwards. 2. The ottoman device according to claim 1 , wherein when the ottoman main body reaches the storage position, the ottoman main body is pushed in a front direction of the seat main body by a moving operation force of the ottoman main body to the storage position and stands up. An ottoman device for a vehicle seat configured to tilt. 2. The ottoman device according to claim 1, wherein the ottoman body is supported so as to be tiltable up and down at a front end of a rack supported so as to be movable back and forth along the lower surface of the seat body. An ottoman device configured to take out and store the ottoman body by being moved by rotation of the pinion gear.

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