Seat

Abstract

To stabilize an attitude of a user seated on a seat further.SOLUTION: A vehicle seat 1 comprises an ottoman device 3. The ottoman device 3 comprises: a placement portion 5 which is configured to be movable to a stowed position and a deployed position; a pair of left and right auxiliary parts 8 configured to be movable to the stowed position and the deployed position; a pressing part 7 which moves the placement portion 5 from the stowed position to the deployed position; and a second movement part which moves each of the pair of left and right auxiliary parts 8 from the stowed position to the deployed position to inhibit destabilization of an attitude of an occupant caused by the placement portion 5 being moved to the deployed position by the pressing part 7 in a state that the placement portion 5 is in the stowed position and the pair of left and right auxiliary parts 8 is in the stowed position.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seat with a movable device. [Background technology]

[0002] As this type of seat, a seat equipped with an ottoman on which the legs of a user seated on the seat cushion are placed is known (see, for example, Patent Document 1). In the seat described in Patent Document 1, the ottoman is moved from a stored position located below the seat cushion to a deployed position located in front of the seat cushion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-248109 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a certain part of the seat (for example, an ottoman) is movable as in the seat described in Patent Document 1, there is a risk of problems occurring, such as a loss of stability in the user's posture. [Means for solving the problem]

[0005] One aspect of the present invention provides a seat equipped with a movable device. The movable device includes a first movable member movable between a first position and a second position, a second movable member movable between a third position and a fourth position, a first movable unit configured to move the first movable member from the first position to the second position, a second movable unit configured to move the second movable member from the third position to the fourth position when the first movable member is in the first position and the second movable member is in the third position, so as to prevent instability of the user's posture caused by the first movable unit moving the first movable member to the second position, and an interlocking unit configured to interlock the movement of the first movable member from the first position to the second position by the first movable unit with the movement of the second movable member from the third position to the fourth position by the second movable unit. The first movable member has a base and a movable unit, the movable unit including a rectangular plate-shaped frame main body, and the interlocking unit is disposed along the surface of the frame main body. [Effects of the Invention]

[0006] According to the present invention, the posture of a user sitting on a seat can be made more stable. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of a vehicle seat equipped with an ottoman device according to an embodiment of the present invention; [Figure 2] 1 is a perspective view of a seat frame that forms the framework of a vehicle seat according to an embodiment of the present invention; [Figure 3] FIG. 2 is a perspective view showing the internal structure of the ottoman device. [Figure 4] 1 is a perspective view of an ottoman frame that forms the framework of a mounting portion of the ottoman device, auxiliary frames that form the framework of a pair of left and right auxiliary portions, and an interlocking portion. FIG. [Figure 5] FIG. 4 is a perspective view of a support portion and a pressing portion of the ottoman device. [Figure 6] FIG. 10 is a diagram showing a state in which the auxiliary part is held in the deployed state by the biasing part. [Figure 7A] FIG. 10 is a diagram illustrating the ottoman frame in the storage state of the placement portion. [Figure 7B]FIG. 10 is a diagram illustrating the ottoman frame in the deployed state of the placement section. [Figure 8A] 10A and 10B are diagrams illustrating the auxiliary frame and the interlocking portion in a stored state of the pair of left and right auxiliary portions. [Figure 8B] 10A and 10B are diagrams illustrating the auxiliary frame and the interlocking portion in the deployed state of the pair of left and right auxiliary portions. [Figure 9] FIG. 10 is a diagram illustrating a first modified example of the ottoman device according to the present embodiment. [Figure 10A] FIG. 10 is a diagram illustrating a second modified example of the ottoman device according to the embodiment. [Figure 10B] FIG. 10 is a diagram illustrating a second modified example of the ottoman device according to the embodiment. [Figure 11] FIG. 10 is a diagram illustrating a third modified example of the ottoman device according to the embodiment. [Figure 12A] FIG. 10 is a diagram illustrating a fourth modified example of the ottoman device according to the embodiment. [Figure 12B] FIG. 10 is a diagram illustrating a fourth modified example of the ottoman device according to the embodiment. [Figure 12C] FIG. 10 is a diagram illustrating a fourth modified example of the ottoman device according to the embodiment. [Figure 12D] FIG. 10 is a diagram illustrating a fourth modified example of the ottoman device according to the embodiment. [Figure 13A] 10A and 10B are diagrams illustrating a modified example of the seat device according to the embodiment. [Figure 13B] 10A and 10B are diagrams illustrating a modified example of the seat device according to the embodiment. [Figure 13C] 10A and 10B are diagrams illustrating a modified example of the seat device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described below with reference to Figures 1 to 13C. A seat according to an embodiment of the present invention is a seat equipped with an ottoman device (movable device) on which the legs of a user seated in the seat device are placed, and can be applied to various types of seats. Below, an example will be described in which the seat equipped with an ottoman device is applied to a vehicle seat, for example, a car seat.

[0009] Fig. 1 is a perspective view of a vehicle seat 1 equipped with an ottoman device 3 according to an embodiment of the present invention. For convenience, the front-rear direction, left-right direction, and up-down direction will be defined as shown in the figure, and each part will be described according to these definitions. The front-rear direction, left-right direction, and up-down direction in Fig. 1 respectively correspond to the front-rear direction, width direction, and height direction of the vehicle to which the vehicle seat 1 is attached.

[0010] 1, a vehicle seat 1 includes a seat device 2 on which an occupant sits, and an ottoman device 3 on which the legs of the occupant seated in the seat device 2 are placed. The seat device 2 includes a seat cushion 21 that supports the buttocks of the occupant, a seat back 22 that supports the back of the occupant, and a headrest 23 that supports the head of the occupant.

[0011] The seat cushion 21 is mounted on a support portion 24 provided in the vehicle cabin and is configured to be movable on a pair of left and right seat rails 25 (see FIG. 2) provided inside the support portion 24. The support portion 24 is provided, for example, in the rear seat of the vehicle. The seat back 22 is disposed at the rear end of the seat cushion 21 and is configured to be tiltable relative to the seat cushion 21 via a reclining mechanism 26. The seat back 22 also has a center-tilting mechanism 27, which is configured to allow the second seat back portion 22b located above to tilt relative to the first seat back portion 22a located below. The headrest 23 is provided at the upper end of the seat back 22 (second seat back portion 22b) and is configured to be able to change its height relative to the seat back 22 to match the position of the occupant's head.

[0012] Fig. 2 is a perspective view of the seat frame 4 that forms the framework of the vehicle seat 1 according to this embodiment. As shown in Fig. 2, the seat frame 4 has a seat cushion frame 41 that is a frame corresponding to the seat cushion 21, a seat back frame 42 that is a frame corresponding to the seat back 22, and an ottoman frame 50 and an auxiliary frame 80 that are frames corresponding to the ottoman device 3. The seat cushion frame 41, the seat back frame 42, the ottoman frame 50, and the auxiliary frame 80 are formed along the outer shapes of the corresponding seat cushion 21, seat back 22, and ottoman device 3, respectively.

[0013] 1 and 2, the seat cushion 21 is configured by attaching a cushion pad 211 made of a cushioning material such as urethane foam to a seat cushion frame 41, which serves as a skeleton, and further covering the cushion pad 211 with a cover material 212 made of synthetic leather or fabric. The cushion pad 211 is supported by the seat cushion frame 41 and functions as a pressure-receiving portion that receives a load from the buttocks of the occupant. The cushion pad 211 according to this embodiment has a central portion 211a in the left-right direction and side portions 211b on both the left and right sides thereof, and is configured to receive a downward load at the central portion 211a and a lateral load at the side portions 211b.

[0014] The seat cushion frame 41 has a front frame 411 that extends in the left-right direction and forms the front part of the seat cushion frame 41, a pair of left and right side frames 412 that extend in the front-rear direction and form the left and right side parts of the seat cushion frame 41, and a rear frame 413 that extends in the left-right direction and forms the rear part of the seat cushion frame 41. The front frame 411, the pair of left and right side frames 412, and the rear frame 413 are joined together by welding or the like, and the seat cushion frame 41 is formed into a frame shape as a whole.

[0015] A plurality of spring members 414 are provided inside the frame-shaped seat cushion frame 41 so as to span between the front frame 411 and the rear frame 413. The plurality of spring members 414 are configured in an elastically deformable bent shape and are configured by bending a wire or the like.

[0016] A plate-shaped pan frame 415 is provided on the inside front of the frame-shaped seat cushion frame 41. The pan frame 415 extends in the left-right direction and is integrally joined by welding or the like to the lower ends of the pair of left and right side frames 412 in front of the seat cushion frame 41. Rotary connectors (not shown) for rotatably connecting the ottoman frame 50 are provided on the undersides of both left and right ends on the front side of the seat cushion frame 41.

[0017] The seat cushion frame 41 is provided within the support portion 24 and slidably engaged with a pair of left and right seat rails 25 extending in the front-rear direction, thereby allowing the seat cushion 21 to move in the front-rear direction within the vehicle cabin.

[0018] The seat back 22 is configured by attaching a back pad 221 made of a cushioning material to a seat back frame 42, which serves as the skeleton, and further covering the outside of the back pad 221 with a covering material 222 made of synthetic leather or fabric. The back pad 221 is supported by the seat back frame 42 and functions as a pressure receiving part that receives the load from the back of the occupant. The back pad 221 according to this embodiment has a central part 221a in the left-right direction and side parts 221b on both the left and right sides thereof, and is configured so that the central part 221a receives a rearward load and the side parts 221b receive a lateral load.

[0019] The seatback frame 42 has an upper frame 421 that extends in the left-right direction and constitutes the upper part of the seatback frame 42, a pair of left and right side frames 422 that stand upright in the vertical direction and constitute the left and right sides of the seatback frame 42, and a lower frame 423 that extends in the left-right direction and constitutes the lower part of the seatback frame 42. The upper frame 421, the pair of left and right side frames 422, and the lower frame 423 are joined together by welding or the like, and the seatback frame 42 is formed as a frame overall.

[0020] Each of the pair of left and right side frames 422 has a first side frame 422a located below and a second side frame 422b located above, and the second side frame 422b is tiltably connected to the first side frame 422a via the seat back folding mechanism 27. The pair of left and right first side frames 422a and the lower frame 423 form the first seat back portion 22a, and the pair of left and right second side frames 422b and the upper frame 421 form the second seat back portion 22b, which is tiltable relative to the first seat back portion 22a.

[0021] A back panel 424 is disposed inside the frame-shaped seat back frame 42. The back panel 424 is an elastically deformable plate-like member that extends in the vertical and horizontal directions, and is made of resin or the like. The upper end of the back panel 424 is supported by a pair of left and right side frames 422 via a pair of left and right upper connecting wires 425, and the lower end is supported by a lower frame 423 via a lower connecting wire 426.

[0022] The lower portion of the seat back frame 42 is connected to the rear end portion of the seat cushion frame 41 via the reclining mechanism 26 so as to be tiltable, thereby allowing the seat back 22 to tilt relative to the seat cushion 21.

[0023] Headrest 23 is constructed by attaching headrest pad 231 made of cushioning material to a core material that serves as a skeleton, and then covering the outside of that with skin material 232 made of synthetic leather or fabric. Headrest 23 is attached to seatback frame 42 by inserting a pair of pipes 233 attached to the core material into support brackets 427 provided on upper frame 421 of seatback frame 42.

[0024] 3 is a perspective view showing the internal structure of the ottoman device 3. As shown in FIG.

[0025] The ottoman device 3 has a base portion (first movable member) 5 configured to be movable between a storage position (first position) located below the seat cushion 21 and an expanded position (second position) located in front of the seat cushion 21, a support portion 6 that supports the base portion 5, a pressing portion (first moving portion) 7 that presses the base portion 5 to move it from the storage position to the expanded position, a pair of left and right auxiliary portions (second movable members) 8 configured to be movable between a storage position (third position) located on approximately the same plane as the base portion 5 and an expanded position (fourth position) in which the base portion 5 is expanded on both the left and right sides, and a linkage portion (second moving portion) 9 that moves each of the pair of left and right auxiliary portions 8 from the storage position to the expanded position in conjunction with the movement of the base portion 5 moving from the storage position to the expanded position.

[0026] The stored position of the bearing portion 5 refers to a state in which the bearing portion 5 is located below the seat cushion 21 so as not to interfere with the legs of a user seated in the vehicle seat 1, and includes, for example, a state (posture) in which the bearing surface 5a faces forward. On the other hand, the unfolded state of the bearing portion 5 refers to a state in which the bearing portion 5 is located in front of the seat cushion 21 so as to be able to place the legs of a user seated in the vehicle seat 1, and includes, for example, a state (posture) in which the bearing surface 5a faces upward.

[0027] Similarly, the stored position of the pair of left and right auxiliary parts 8 is a state in which the auxiliary surfaces 8a are positioned on approximately the same plane as the mounting surface 5a of the mounting part 5, and includes, for example, a state (posture) in which the auxiliary surfaces 8a face the same direction as the mounting surface 5a. On the other hand, the deployed position of the pair of left and right auxiliary parts 8 is a state in which they are rotated so as to be able to hold the legs of an occupant placed on the mounting part 5 from both the left and right sides, and includes, for example, a state (posture) in which the auxiliary surfaces 8a face the legs of the occupant.

[0028] 1 and 3, the resting portion 5 is constructed by attaching a pad 51 made of a cushioning material such as urethane foam to an ottoman frame 50, which serves as the framework, and then covering the pad with a skin material 52 made of synthetic leather or fabric. The pad 51 is supported on the upper surface of the ottoman frame 50, which corresponds to the resting surface, and functions as a pressure-receiving portion that receives the load from the legs of the occupant. The skin material 52 integrally covers the resting portion 5 as well as the device including the support portion 6, the pressing portion 7, and part of the interlocking portion 9, excluding a support bracket 61, which will be described later.

[0029] 4 is a perspective view of an ottoman frame 50 that forms the framework of the mounting portion 5 of the ottoman device 3, auxiliary frames 80 that form the framework of the pair of left and right auxiliary portions 8, and the interlocking portion 9. As shown in FIG. 4, the ottoman frame 50 includes a base frame (base portion) 53 that is rotatably connected to the pan frame 415, and a movable frame (movable portion) 54 that is slidably supported by the base frame 53.

[0030] The base frame 53 has a base end frame 531 that extends in the left-right direction and constitutes the base end of the base frame 53, a pair of left and right side frames 532 that extend in a direction perpendicular to the base end frame 531 and constitute the left and right side portions of the base frame 53, and a tip frame 533 that extends in the left-right direction and constitutes the tip end of the base frame 53. The base end frame 531, the pair of left and right side frames 532, and the tip frame 533 are joined together by welding or the like, and the entire base frame 53 is formed in a frame shape (grid shape).

[0031] The base frame 531 is provided at each of its left and right ends with a first rotational connector 531a that is connected via a rotational shaft (not shown) to a rotational connector provided on the pair of left and right side frames 412. The rotational connector and the first rotational connector 531a are connected via a rotational shaft that extends in the left and right direction, and the base frame 531 is rotatable around this rotational shaft. In other words, the base frame 53 is rotatable in the up and down direction relative to the seat cushion frame 41 around the rotational shaft that extends in the left and right direction.

[0032] The movable frame 54 includes a frame main body 541 formed in the shape of a rectangular plate and a pair of left and right sliding portions 542 configured to slide freely on each of the pair of left and right side frames 532. The frame main body 541 is disposed facing the base frame 53 and is formed in substantially the same shape as the overall shape (frame shape) of the base frame 53. A pad 51 is disposed on the upper surface of the frame main body 541, and an opening 541a is formed in the base end side of the frame main body 541. The pair of left and right sliding portions 542 are provided at both left and right ends of the frame main body 541, respectively, and are attached to the frame main body 541 so that the frame main body 541 can slide in the extension direction of the pair of left and right side frames 532. In this embodiment, the pair of left and right sliding portions 542 are formed in a substantially cylindrical shape that can slide on the rod-shaped side frames 532 in the extension direction, and are joined to the frame main body 541 via brackets 541b.

[0033] 5 is a perspective view of the support portion 6 and the pressing portion 7 of the ottoman device 3. As shown in Fig. 5, the support portion 6 has a support bracket 61 connected to the underside of the pan frame 415, a pair of left and right guide portions 62 supported by the support bracket 61, and a connecting bracket 63 that connects the pair of left and right guide portions 62 and the movable frame 54.

[0034] The support bracket 61 is formed so that its support surface (upper surface) 61a is positioned lower than the lower surface of the pan frame 415 so that the pair of left and right guide portions 62 and the pressing portion 7 can be supported on the upper surface. The support surface 61a of the support bracket 61 is formed substantially parallel to the lower surface of the pan frame 415, so that the pair of left and right guide portions 62 can slide in the front-rear direction substantially parallel to the pan frame 415, and the pressing portion 7 can apply a pressing force in the front-rear direction to the mounting portion 5 substantially parallel to the pan frame 415.

[0035] The pair of left and right guide portions 62 are respectively provided at both left and right ends of the support surface 61a of the support bracket 61, and have a cylindrical portion 621 extending in the front-to-rear direction, and a guide rail 622 formed to be slidable inside the cylindrical portion 621. The cylindrical portion 621 is joined integrally with the support surface 61a of the support bracket 61 by welding or the like, and the guide rail 622, which is longer in the sliding direction than the cylindrical portion 621, is housed inside the cylindrical portion 621 to be slidable.

[0036] The connecting bracket 63 is connected to the upper surface of the frame main body 541 of the movable frame 54. The connecting bracket 63 has second to fourth rotational connectors 631, 632, 633, which are provided extending toward the opening 541a of the frame main body 541. The second and third rotational connectors 631, 632 are provided at both left and right ends, and tip ends 622a of a pair of left and right guide rails 622 are connected to the second and third rotational connectors 631, 632 via the opening 541a. The second and third rotational connectors 631, 632 and the tip ends 622a of the pair of left and right guide rails 622 are connected to each other so as to be rotatable about a rotation axis extending in the left and right direction.

[0037] The pressing unit 7 is provided between the pair of left and right guide units 62 on the support surface 61a of the support bracket 61, and includes a drive shaft 71 configured to be able to press the movable frame 54, and an actuator 72 that drives the drive shaft 71. The drive shaft 71 extends in the front-rear direction substantially parallel to the pair of left and right guide units 62, and is supported on the support surface 61a of the support bracket 61 so as to be movable in the front-rear direction. The tip end 71a of the drive shaft 71 is connected to the fourth rotation coupling unit 633 of the connecting bracket 63 through the opening 541a so as to be rotatable around a rotation axis extending in the left-right direction. The fourth rotation coupling unit 633 of the connecting bracket 63 is provided between the second rotation coupling unit 631 and the third rotation coupling unit 632.

[0038] In this embodiment, the actuator 72 is configured as a screw motor. The actuator 72 is supported on the support surface 64a of the support bracket 64 so that its rotation shaft extends in the left-right direction, and the actuator 72 and drive shaft 71 are connected via a gear train 73 that converts the power transmitted from the rotation shaft of the actuator 72 into power in the extension direction of the drive shaft 71.

[0039] 1 and 2, a pair of left and right auxiliary parts 8 are provided at both left and right ends of the mounting part 5, respectively, and are rotatably connected to the mounting part 5. The auxiliary part 8 is configured by attaching an auxiliary pad 81 made of a cushioning material such as urethane foam to an auxiliary frame 80 that serves as a skeleton, and further covering the outside of that with a skin material 82 made of synthetic leather or fabric.

[0040] 3 and 4, the auxiliary frame 80 includes an auxiliary frame main body 83 and a hinge portion 84 that rotatably supports the auxiliary frame main body 83. The auxiliary frame main body 83 has a base end frame 831 that forms the base end of the auxiliary frame 80, a pair of side frames 832 that form the sides of the auxiliary frame main body 83, and a tip frame 833 that forms the tip end of the auxiliary frame main body 83. The base end frame 831, the pair of side frames 832, and the tip frame 833 are joined together by welding or the like, and the entire auxiliary frame 80 is formed into a frame shape (grid shape).

[0041] The base end frame 831 is disposed approximately parallel to the left and right ends of the movable frame 54 of the mounting portion 5, and is rotatably connected to the left and right ends of the frame main body 541 of the movable frame 54 via hinge portions 84 having rotation axes extending approximately parallel to the sliding direction of the movable frame 54. The auxiliary pad 81 is supported on the upper surface corresponding to the auxiliary surface 8a of the auxiliary portion 8, and functions as a pressure-receiving portion that receives the left and right load from the legs of the occupant placed on the mounting portion 5. The covering material 82 covers the auxiliary frame 80, the auxiliary pad 81, etc., and constitutes the external appearance of the auxiliary portion 8.

[0042] As shown in Figure 4, the interlocking part 9 has an outer cable 90 formed in a cylindrical shape, an inner cable 91 (connecting member) inserted movably within the outer cable 90, a variable means 92 (moving part, see Figure 6 described later) that varies the length of the inner cable 91, and a biasing part 93 (see Figure 6 described later) that biases each of the pair of left and right auxiliary parts 8 to hold them in the deployed position.

[0043] The outer cable 90 has a first outer cable 901 arranged approximately parallel to the sliding direction of the movable frame 54 in approximately the center in the left-right direction of the upper surface of the movable frame 54, a second outer cable 902 extending from the tip of the first outer cable 901 toward the auxiliary part 8 on one side, and a third outer cable 903 extending from the tip of the first outer cable 901 toward the auxiliary part 8 on the other side. The first to third outer cables 901 to 903 are arranged in communication with each other.

[0044] The inner cable 91 has a first inner cable 911 inserted through the first outer cable 901, a second inner cable 912 inserted through the second outer cable 902, and a third inner cable 913 inserted through the third outer cable 903. One end of the first inner cable 911 is connected to the variable means 92, and the other end is branched into two. One end of the second inner cable 912 is connected to one branched side of the first inner cable 911, and the other end is connected to the auxiliary frame 80 on one side. One end of the third inner cable 913 is connected to the other branched side of the first inner cable 911, and the other end is connected to the auxiliary frame 80 on the other side.

[0045] The variable means 92 changes the length of the inner cable 91 connected to each of the pair of left and right auxiliary frames 80, thereby moving (rotating) each of the pair of left and right auxiliary parts 8 in conjunction with the movement of the mounting part 5. Specifically, the variable means 92 changes the length of the inner cable 91 connected to each of the pair of left and right auxiliary parts 8 so that each of the pair of left and right auxiliary parts 8 moves from the stored position to the deployed position in conjunction with the movement of the mounting part 5, which moves from the stored position to the deployed position.

[0046] 6 is a diagram showing a state in which the auxiliary part 8 is held in the deployed state by the biasing part 93. For example, if the length of the inner cable 91 in a state in which the auxiliary part 8 is held in the stored position against the biasing force of the biasing part 93 (the state shown by the dashed line in FIG. 6) is defined as a first length, and the length of the inner cable 91 in a state in which the auxiliary part 8 is held in the deployed position by the biasing force of the biasing part 93 (the state shown by the solid line in FIG. 6) is defined as a second length, the varying means 92 changes the length of the inner cable 91 so that the length of the inner cable 91 is the first length when the mounting part 5 is in the stored position and the second length when the mounting part 5 is in the deployed position. In this case, the first length of the inner cable 91 is shorter than the second length.

[0047] The variable means 92 can be configured, for example, by a drive device such as a stepping motor that can wind up the inner cable 91. In this case, it is preferable that when a drive signal is input to the control unit by the occupant turning on a drive switch (not shown) of the ottoman device 3, a movable signal is input to each of the actuator 72 of the pressing portion 7 and the drive device. With this configuration, the actuator 72 of the pressing portion 7 and the drive device that winds up the inner cable 91 can be operated in conjunction with each other. Furthermore, the variable means 92 may be configured to be operated by an occupant seated in the seat device 2, and to change the length of the inner cable 91 without being linked to the movement of the placement portion 5. For example, the variable means 92 may be configured so that the occupant winds up a manual winding device, or so that the occupant turns on and off an electric winding device.

[0048] The biasing portion 93 has one end connected to the back surface of the auxiliary portion 8 and the other end connected to the frame body 541 of the movable frame 54, and holds the auxiliary portion 8 connected via the inner cable 91 so that it can move between a stored state and an unfolded state.

[0049] Next, a description will be given of the operation when the ottoman device 3 provided on the vehicle seat 1 configured as described above is shifted from the stored state to the deployed state. First, a description will be given of the operation when the mounting portion 5 is shifted from the stored state to the deployed state. Fig. 7A is a diagram showing the ottoman frame 50 when the mounting portion 5 is in the stored state, and Fig. 7B is a diagram showing the ottoman frame 50 when the mounting portion 5 is in the stored state.

[0050] 7A, before an occupant sits on the vehicle seat 1, the ottoman device 3 is in a stored state. That is, the mounting portion 5 is located in a stored position. In the stored position, no pressing force is applied to the movable frame 54 of the mounting portion 5 (no moving signal is input from the control unit), and the mounting portion 5 is in a state (posture) in which the sliding direction of the movable frame 54 relative to the base frame 53 is not in the front-to-rear direction. This state also does not match the moving direction of the drive shaft 71 of the pressing portion 7 or the sliding direction of the guide rails 622 of the pair of left and right guide portions 62.

[0051] When an occupant seated in the vehicle seat 1 turns on a drive switch (not shown) of the ottoman device 3 from this state, a drive signal is input to the control unit. When the drive signal is input to the control unit, a movement signal is input to the actuator 72 of the pressing unit 7, and the actuator 72 is activated. When the actuator 72 is activated, a pressing force that tries to move forward acts on the drive shaft 71, and the drive shaft 71 presses the movable frame 54 via the fourth rotation connecting portion 633 of the connecting bracket 63 with a pressing force due to linear movement.

[0052] When the drive shaft 71 presses the movable frame 54 via the connecting bracket 63, the pressing force due to the linear movement of the drive shaft 71 is converted into a rotational force via the second to fourth rotational connecting portions 631, 632, and 633, causing the base frame 53 and the movable frame 54 to rotate upward. When the base frame 53 and the movable frame 54 rotate upward and the sliding direction of the movable frame 54 relative to the base frame 53 becomes the same direction (pushable direction) as the pressing direction due to the linear movement of the drive shaft 71 and the sliding direction of the guide rails 622 of the pair of left and right guide portions 62, the rotational force gradually changes into a pushing force, and the movable frame 54 slides forward relative to the base frame 53. In this way, the movable frame 54 of the mounting portion 5 moves to the unfolded position shown in FIG. 7B , and the ottoman device 3 is unfolded.

[0053] Next, a description will be given of the action when the pair of left and right auxiliary parts 8 move from the stored position to the deployed position in conjunction with the mounting part 5. Fig. 8A is a diagram illustrating the auxiliary frame 80 and the interlocking part 9 when the pair of left and right auxiliary parts 8 are in the stored state, and Fig. 8B is a diagram illustrating the auxiliary frame 80 and the interlocking part 9 when the pair of left and right auxiliary parts 8 are in the deployed state.

[0054] 8A, when the mounting portion 5 is in the storage position, the pair of left and right auxiliary portions 8 are also in the storage position. When the auxiliary portions 8 are in the storage position, the length of the inner cable 91 is the first length, and the auxiliary frame 80, which is pulled by the inner cable 91, is held in the storage position against the biasing force of the biasing portion 93.

[0055] When an occupant seated in the vehicle seat 1 turns on a drive switch (not shown) of the ottoman device 3 from this state, a drive signal is input to the control unit. When the drive signal is input to the control unit, a movement signal is input to the variable means 92 (for example, a winding device for the inner cable 91) in addition to the actuator 72 of the pressing unit 7 described above, and the variable means 92 (winding device) also operates. When the variable means 92 (winding device) operates, the length of the inner cable 91 increases to a second length. When the length of the inner cable 91 reaches the second length, the biasing force of the biasing portion 93 moves the auxiliary portion 8 to the deployed position shown in FIG. 8B and is maintained in the deployed state.

[0056] As described above, the base frame 53 and the movable frame 54 are rotated upward by the pressing force generated by the linear movement of the drive shaft 71, and the movable frame 54 is moved to the deployed position, so that the ottoman device 3 excluding the placing portion 5 can be made smaller.

[0057] Furthermore, even if the movable frame 54 slides forward relative to the base frame 53, the drive shaft 71 and guide rail 622 also move forward, resulting in little change in the length of the portion excluding the support bracket 61. Therefore, the entire device, including the support portion 6, the pressing portion 7, and the placing portion 5, excluding the support bracket 61, can be integrally covered with the covering material 52. This eliminates the need to make the covering material 52 longer than necessary, prevents it from getting caught during movement, and improves the appearance. It is advisable to form slits along the movement direction of the covering material 52 at the connection portions between the support bracket 61 or the base frame 53 and the seat cushion frame 41 (the pair of left and right side frames 412 and the pan frame 415).

[0058] Furthermore, since the pair of left and right auxiliary parts 8 are moved to the deployed position in conjunction with the movement of the mounting part 5 to the deployed position, the legs of the occupant placed on the mounting part 5 can be more stabilized in the deployed position. For example, it is possible to prevent the legs of the occupant placed on the mounting part 5 from falling off the mounting part 5.

[0059] According to this embodiment, the following effects can be achieved. (1) A vehicle seat 1 according to this embodiment includes an ottoman device 3 (FIG. 1). The ottoman device 3 includes a mounting portion 5 configured to be movable between a storage position and an unfolded position, a pair of left and right auxiliary portions 8 configured to be movable between the storage position and the unfolded position, a pressing portion 7 that moves the mounting portion 5 from the storage position to the unfolded position, and a second moving portion (interlocking portion 9) that, when the mounting portion 5 is in the storage position and the pair of left and right auxiliary portions 8 are in the storage position and the position of the mounting portion 5 is moved to the unfolded position by the pressing portion 7, moves each of the pair of left and right auxiliary portions 8 from the storage position to the unfolded position so as to prevent the destabilization of the occupant's posture caused by this movement (FIGS. 1, 8A, and 8B).

[0060] This configuration can further stabilize the posture of the occupant when the ottoman device 3 is moved to the deployed position. For example, by holding the legs of the occupant placed on the mounting portion 5 of the ottoman device 3 from the left and right with the pair of left and right auxiliary portions 8, it is possible to prevent the legs of the occupant from falling off the ottoman device 3, and the posture of the occupant seated in the seat device 2 can be further stabilized.

[0061] (2) The vehicle seat 1 further includes a linking unit 9 that links the movement of each of the pair of left and right auxiliary units 8 moved from the storage position to the deployment position by the pressing unit 7 with the movement of each of the pair of left and right auxiliary units 8 moved from the storage position to the deployment position by the second moving unit (Figures 4, 8A, and 8B).

[0062] With this configuration, the occupant can drive the pair of left and right auxiliary parts 8 simply by driving the ottoman device 3, making it easier to stabilize the posture of the occupant seated in the seat device 2.

[0063] (3) In the above-described vehicle seat 1, the second moving section is configured by an interlocking section 9, and the interlocking section 9 has an inner cable 91 connected to the pair of left and right auxiliary sections 8, and a variable means 92 that varies the length of the inner cable 91 to move each of the pair of left and right auxiliary sections 8 in conjunction with the movement of the mounting section 5 (FIG. 4). With this simple configuration, the pair of left and right auxiliary sections 8 can be moved to the unfolded position in conjunction with the movement of the mounting section 5 to the unfolded position.

[0064] (4) The vehicle seat 1 described above includes a seat device 2 on which an occupant sits and an ottoman device 3 on which the legs of the occupant seated in the seat device 2 are placed, and the movable device is the ottoman device 3 (FIG. 1). The ottoman device 3 is configured to be movable from a storage position to an extended position and includes a resting portion 5 on which the legs of the occupant are placed, and a pair of left and right auxiliary portions 8 configured to be movable from the storage position to the extended position and provided on both sides in the width direction of the resting portion 5 (FIG. 1). This configuration allows the occupant seated in the seat device 2 with their legs placed on the ottoman device 3 to feel more relaxed.

[0065] The vehicle seat 1 according to the above embodiment can be modified into various forms. Modified examples of the vehicle seat 1 will be described below.

[0066] First, a description will be given of a modified example of the ottoman device 3, which is an example of a movable device provided in the vehicle seat 1. In the above embodiment, an example has been described in which the interlocking unit 9 that interlocks the pair of left and right auxiliary units 8 of the ottoman device 3 with the mounting unit 5 is configured to vary the length of the inner cable 91 inserted inside the outer cable 90 with the variable means 92, thereby moving the pair of left and right auxiliary units 8, which are located in the stored position, to the deployed position against the biasing force of the biasing unit 93, but the present invention is not limited to this.

[0067] 9 is a diagram illustrating a first modified example of the ottoman device 3 according to the present embodiment. As shown in FIG. 9, the ottoman device 3 may be configured, for example, such that the length of the portion of the belt member 94 that is positioned on the mounting portion 5 and that is stretched over each of the pair of left and right auxiliary portions 8 is changed by sliding it on an inclined surface 95a of an inclined member 95, thereby moving each of the pair of left and right auxiliary portions 8 that is positioned in the stored position to the deployed position against the biasing force of the biasing portion 93. With this configuration, the interlocking portion 9 can be provided with a simple configuration, for example, without using an electric device or the like that changes the length of the belt member 94.

[0068] 10A and 10B are diagrams illustrating a second modified example of the ottoman device 3 according to the present embodiment. As shown in FIGS. 10A and 10B, the ottoman device 3 may be configured such that, for example, each of the pair of left and right auxiliary parts 8 is provided with a roller member 97 that can roll on an inclined member 96, and the roller member 97 rolls on an inclined surface 96a of the inclined member 96 to move each of the pair of left and right auxiliary parts 8 that is located in the stored position to the deployed position. With this configuration, the interlocking part 9 can be provided with a simple configuration, without, for example, providing an electric device that changes the length of the belt member 94 or a biasing part 93 that biases each of the pair of left and right auxiliary parts 8.

[0069] 11 is a diagram illustrating a third modified example of the ottoman device 3 according to the present embodiment. In the above embodiment, an example has been described in which the pair of left and right sliding portions 542 of the movable frame 54, which move on the pair of left and right side frames 532 of the base frame 53, are brought into contact with the tip frame 533 of the base frame 53, thereby restricting the amount of movement of the movable frame 54, but the present invention is not limited to this.

[0070] 11, the ottoman device 3 may be configured to restrict the amount of movement of the movable frame 54 in the front-rear direction by a restricting unit 55. The restricting unit 55 may include, for example, a cable 552 having an engaging unit 551 at its tip, an adjusting unit 554 having a plurality of engaged units 553 engageable with the engaging unit 551, and a winding unit 555 that can wind up the cable 552 when the maximum length of the cable 552 is set.

[0071] 11 , for example, when the engaging portion 551 is engaged with the first engaged portion 553a located at the rearmost portion of the adjustment portion 554, the amount of movement of the movable frame 54 can be reduced compared to when the engaging portion 551 is engaged with the second engaged portion 553b located at the foremost portion of the adjustment portion 554. In other words, the placement portion 5 can be positioned closer to the seat cushion 21. By reducing the amount of movement of the movable frame 54 and positioning the placement portion 5 closer to the seat cushion 21 in this way, the placement portion 5 can be positioned at an appropriate position even when a relatively short occupant, such as a child, sits in the seat apparatus 2.

[0072] 12A to 12D are diagrams illustrating a fourth modified example of the ottoman device 3 according to the present embodiment. In the above embodiment, an example has been described in which the frame main body 541 formed in a rectangular plate shape is used as the frame main body of the movable frame 54, but the present invention is not limited to this.

[0073] 12A to 12D, instead of rectangular plate-shaped frame main body 541, movable frame 54 may have a frame main body 544 having a plurality of holes 543 formed therein, and a plurality of protrusion members 545 formed to be able to pass through the plurality of holes 543. The plurality of holes 543 formed in frame main body 544 shown in Fig. 12A are formed in regions at both ends of frame main body 544 in the left and right directions. The plurality of holes 543 formed in the right end region of frame main body 544 and the plurality of holes 543 formed in the left end region are formed symmetrically with respect to a center line in the left and right direction extending in the sliding direction of frame main body 544.

[0074] 12A, the plurality of holes 543 formed in each of the right and left end regions are configured as first to fourth rows 543a to 543d, which are equally spaced apart in the left-right direction. In each of the first to fourth rows 543a to 543d, the holes 543 are arranged at equal intervals in the sliding direction. The plurality of holes 543 forming the first row 543a are larger than the plurality of holes 543 forming the fourth row 543d, and the plurality of holes 543 are formed so that they gradually become smaller from the first row 543a to the fourth row 543d.

[0075] 12C and 12D, the plurality of protrusion members 545 are formed so as to be able to pass through the hole portions 543 of the first to fourth rows 543a to 543d from bottom to top, respectively, and the protrusion members 545 protruding from the hole portions 543 of the first row 543a are formed so as to protrude a greater amount than the protrusion members 545 protruding from the hole portions of the fourth row 543d. In other words, the protrusion members 545 protruding from the hole portions 543 located on the outer side in the left-right direction are formed so as to protrude a greater amount than the protrusion members 545 protruding from the hole portions 543 located on the inner side. In addition, the plurality of protrusion members 545 are biased upward, which is the protruding direction, by a biasing member 546.

[0076] 12A to 12D, it is possible to change the amount of deflection of the pad 51 disposed on the upper surface of the frame main body 544. For example, it is possible to increase the amount of deflection of the pad 51 located in the right end region and the left end region of the frame main body 544 toward the outside in the left-right direction. By increasing the amount of deflection of the pad 51 toward the outside in the left-right direction, it is possible to hold the legs of an occupant placed on the support portion 5 from both the left and right sides without providing a pair of left and right auxiliary portions 8, for example.

[0077] Next, a description will be given of modified examples of the seat device 2 provided in the vehicle seat 1. In the above embodiment, the ottoman device 3 has been used as an example of a movable device provided in the vehicle seat 1, but the present invention is not limited to this. The movable device provided in the vehicle seat 1 can also be applied to the seat device 2 provided in the vehicle seat 1.

[0078] 13A to 13C are diagrams illustrating modified examples of the seat device 2 according to the present embodiment. In the above embodiment, an example has been described in which the seat back 22 is tilted relative to the seat cushion 21 via the reclining mechanism 26, but the present invention is not limited to this. As shown in FIGS. 13A to 13C, a first auxiliary part 85 may be disposed between the seat cushion 21 and the seat back 22 to fill the gap therebetween when the seat back 22 is tilted, and the first auxiliary part 85 may be moved in conjunction with the tilt of the seat back 22 relative to the seat cushion 21 to fill the gap.

[0079] Similarly, in the above embodiment, an example has been described in which the second seatback portion 22b is tilted relative to the first seatback portion 22a via the seatback-tilting mechanism 27, but the present invention is not limited to this. As shown in Figures 13A to 13C, a second auxiliary portion 86 may be disposed between the seatback 22 and the headrest 23 to fill the gap therebetween when the second seatback portion 22b is tilted, and the second auxiliary portion 86 may be moved in conjunction with the tilt of the second seatback portion 22b relative to the first seatback portion 22a to fill the gap.

[0080] By arranging the first or second auxiliary portion 85, 86 in this manner, the posture of the occupant seated in the seat device 2 is stabilized, allowing the occupant to enjoy a more comfortable drive.

[0081] In the above embodiment, the vehicle seat 1 has been described as an example of a seat, but the seat may be used as a seat for vehicles other than a vehicle, for example, a seat for an aircraft or the like, or as a sofa or massage chair used in a home, etc. Furthermore, although the vehicle seat 1 of the present embodiment is preferably used as a rear seat, in the case of an autonomous vehicle, the vehicle seat 1 may be used as a driver's seat or a passenger seat.

[0082] The above description is merely an example, and the present invention is not limited to the above-described embodiment and modifications as long as the features of the present invention are not impaired. One or more of the above-described embodiment and modifications can be arbitrarily combined, and modifications can also be combined with each other. [Explanation of symbols]

[0083] 1 Vehicle seat (seat), 2 Seat device (movable device), 3 Ottoman device (movable device), 5 Placement portion (first movable member), 6 Support portion, 7 Pressing portion (first movable portion), 8 Auxiliary portion (second movable member), 9 Interlocking portion (second movable portion), 21 Seat cushion, 22 Seat back, 53 Base frame, 54 Movable frame

Claims

1. A seat equipped with a movable device, The movable device is a first movable member movable between a first position and a second position; a second movable member movable between a third position and a fourth position; a first moving unit that moves the first movable member from the first position to the second position; a second moving unit that, when the first moving unit moves the position of the first movable member to the second position while the first movable member is at the first position and the second movable member is at the third position, moves the second movable member from the third position to the fourth position so as to suppress instability of the user's posture caused by the movement; a linking unit that links movement of the first movable member, which is moved from the first position to the second position by the first moving unit, and movement of the second movable member, which is moved from the third position to the fourth position by the second moving unit, the first movable member has a base portion and a movable portion; The movable portion includes a rectangular plate-shaped frame body, The seat is characterized in that the interlocking portion is arranged along the surface of the frame body.

2. The sheet according to claim 1, the second moving portion is constituted by the interlocking portion, The seat is characterized in that the interlocking portion has a connecting member connected to the second movable member, and a moving portion that moves the connecting member in conjunction with the movement of the first movable member to move the second movable member.

3. The sheet according to claim 1 or 2, The seat device includes a seat device on which a user sits, and an ottoman device on which the legs of the user seated on the seat device are placed, the movable device is the ottoman device, The ottoman device is characterized in that it has a support section on which the user's legs are placed, which is configured to be movable from the first position to the second position, and a pair of auxiliary sections, left and right, which are configured to be movable from the third position to the fourth position and are provided on both sides of the support section in the width direction.

4. The sheet according to claim 1, The seat is characterized in that the interlocking portion is positioned inward from both vertical sides of the frame body.

5. The sheet according to claim 1, The seat is characterized in that the interlocking portion is arranged inward from both left and right sides of the frame main body.

6. The sheet according to claim 1, the linkage includes a cable; The seat is characterized in that the cable is arranged in a U-shape that protrudes downward along the surface of the frame body.

7. The sheet according to claim 1, The seat is characterized in that the interlocking portion is arranged on the upper surface of the frame body.

Images