Vehicle seats

Abstract

To provide a vehicle seat capable of appropriately detecting biometric information by a sensor while ensuring the degree of freedom in a layout of the sensor even when comprising a lumbar support.SOLUTION: A vehicle seat S comprises a seat back S1. The seat back S1 comprises: a seat back frame F1 that constitutes a skeleton of the seat back S1; a lumbar support 50 that is arranged on a seat back frame F1 to support a waist of a seated person; and a sensor 60 that detects a state of the seated person. The lumbar support 50 is configured, in a grid pattern, of a pair of vertical wires 51 extending in a vertical direction and a plurality of horizontal wires 52 bridging the pair of vertical wires in a seat width direction inside the seat back frame F1. The sensor 60 is arranged on a rear side of the horizontal wires 52 so as to bridge, in the vertical direction, any two horizontal wires 52 of the plurality of horizontal wires 52.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a lumbar support for supporting the lumbar region of a seated occupant. [Background technology]

[0002] Vehicle seats equipped with lumbar supporters such as lumbar support devices that support the lumbar of a seated person are known. For example, Patent Document 1 describes a structure in which a Doppler biosensor is disposed inside a seat back pad between a lower end of the lumbar support device and the seating surface of the seat back so as not to come into contact with a plastic panel when the lumbar support device is activated, that is, when the plastic panel is deflected. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-199100 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle seat configuration of Patent Document 1, the position of the sensor is limited to the lower end of the seat back, which may be disadvantageous from the viewpoint of appropriate detection of biological information. Also, since the sensor is disposed in the seat back pad, the influence of the hardness of the seating surface of the seat back pad cannot be avoided.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a vehicle seat that is capable of appropriately detecting biometric information using sensors while ensuring freedom of sensor layout, even when equipped with a lumbar support. [Means for solving the problem]

[0006] The above problem is solved by a vehicle seat according to the present invention, which is a vehicle seat having a seat back, the seat back including a seat back frame constituting a skeleton of the seat back, a lumbar support disposed on the seat back frame and supporting the lower back of a seated occupant, and a sensor for detecting a state of the seated occupant, the lumbar support being configured in a lattice shape on the inside of the seat back frame with a pair of vertical wires extending in the vertical direction of the vehicle seat and a plurality of horizontal wires that span the pair of vertical wires in the width direction of the vehicle seat, the sensor being disposed on the rear side of the horizontal wires so as to span any two of the plurality of horizontal wires in the vertical direction of the vehicle seat, The vehicle seat includes an adjustment mechanism for adjusting a position of the lumbar support in a front-rear direction of the vehicle seat, and a power motor for electrically driving a movable mechanism of the vehicle seat is attached to the seat back frame, and the sensor is disposed rearward of the power motor and the adjustment mechanism in a side view of the vehicle seat when the lumbar support is positioned at the rearmost position. This is solved by:

[0007] In the vehicle seat of the present invention configured as described above, the sensor can be placed on the back of the lattice-shaped lumbar support made of wire, making it possible to properly detect biometric information by the sensor while ensuring freedom of layout of the sensor. In addition, the movable mechanism of the vehicle seat can be electrically driven by the power motor. Also, by locating the sensor behind the power motor and the adjustment mechanism, it is possible to ensure freedom in the layout of the sensor while allowing the sensor to appropriately detect biological information.

[0008] In the above-mentioned vehicle seat, the lumbar support is provided with a central connecting member that spans the central portions of the multiple lateral wires in the vertical direction of the vehicle seat, and the sensor is preferably positioned in a position that avoids the central connecting member. In the above configuration, the sensor is disposed while appropriately avoiding the central connecting member extending in the vertical direction, and it becomes possible for the sensor to appropriately detect biological information.

[0009] In the above vehicle seat ,before The adjustment mechanism may include an operating lever provided on the seat back frame. In the above configuration, the position of the lumbar support in the front-rear direction can be adjusted by the operating lever.

[0010] In the above vehicle seat, a cable may be provided extending from the adjustment mechanism to the lumbar support, and the sensor may be disposed at a position avoiding the cable. In the above configuration, the sensor is positioned while appropriately avoiding the cable extending from the adjustment mechanism to the lumbar support, making it possible for the sensor to appropriately detect biological information.

[0011] In the above vehicle seat, The seat cushion supports the buttocks of the seated occupant, and the movable mechanism is a reclining device that adjusts the inclination angle of the seat back relative to the seat cushion. Good 。

[0013] In the above-mentioned vehicle seat, the sensor includes an irradiation unit that emits radio waves, a receiving unit that receives the radio waves reflected from the seated occupant, and a housing that contains the irradiation unit and the receiving unit, and the front surface of the sensor may be provided with a plurality of wire engagement units that engage with the lateral wires. In the above configuration, the sensor can be easily attached to the horizontal wire by engaging the wire engaging portion with the horizontal wire. Ma In addition, in the above-mentioned vehicle seat, the wire engagement portion has an L-shaped cross-section extending in the vertical direction, and includes an upper hook portion and a lower hook portion that engage with the horizontal wire, and a clamping portion that is provided between the upper hook portion and the lower hook portion and clamps the horizontal wire from the vertical direction, and the upper hook portion, the lower hook portion and the clamping portion each engage with three of the horizontal wires that are adjacent in the vertical direction.

[0014] In the vehicle seat described above, the irradiation unit and the receiving unit may be disposed between a plurality of the wire engaging units in a vertical direction of the vehicle seat. In the above configuration, the irradiation unit and the receiving unit are arranged so as to avoid the multiple wire engagement units, making it possible for the sensor to appropriately detect biological information.

[0015] The above-mentioned vehicle seat may include a headrest supporting the head of the seated occupant, a seat cushion supporting the buttocks of the seated occupant, a seat cushion frame forming the skeleton of the seat cushion, a slide rail arranged at the lower part of the seat cushion frame, a pad member placed on the seat back frame and the seat cushion frame, and a trim cover covering the pad member. With the above configuration, it is possible to provide a vehicle seat equipped with a sensor and a lumbar support. Effect of the Invention

[0016] According to the vehicle seat of the present invention, the sensor can be placed on the back of a lattice-shaped lumbar support made of wire, making it possible to properly detect biometric information using the sensor while ensuring freedom in sensor layout. Furthermore, according to the vehicle seat of the present invention, the sensor can be positioned while appropriately avoiding the central connecting member extending in the vertical direction, making it possible for the sensor to appropriately detect biological information. Furthermore, according to the vehicle seat of the present invention, the position of the lumbar support in the fore-aft direction can be adjusted by the operating lever. Furthermore, according to the vehicle seat of the present invention, the sensor can be positioned while appropriately avoiding the cable extending from the adjustment mechanism to the lumbar support, making it possible for the sensor to appropriately detect biological information. Furthermore, according to the vehicle seat of the present invention, the movable mechanism included in the vehicle seat can be electrically driven by the power motor. Furthermore, according to the vehicle seat of the present invention, by arranging the sensor behind the power motor and adjustment mechanism, it is possible to ensure freedom in the layout of the sensor while allowing the sensor to appropriately detect biological information. Furthermore, according to the vehicle seat of the present invention, the sensor can be easily attached to the lateral wire by engaging the wire engaging portion with the lateral wire. Furthermore, according to the vehicle seat of the present invention, the irradiation unit and the receiving unit are arranged so as to avoid the multiple wire engagement units, making it possible for the sensor to appropriately detect biological information. Furthermore, according to the vehicle seat of the present invention, it is possible to provide a vehicle seat equipped with a sensor and a lumbar support. [Brief description of the drawings]

[0017] [Figure 1] 1 is an external view of a vehicle seat according to an embodiment of the present invention; [Diagram 2]2 is a front perspective view of a seat frame included in the vehicle seat; FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 11 is a side view of a sensor member according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A vehicle seat according to one embodiment of the present invention (hereinafter, the present embodiment) will be described below with reference to Fig. 1 to Fig. 5. As the vehicle seat according to the present embodiment, a vehicle seat mounted in a vehicle will be described as an example.

[0019] The embodiment described below is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, and other aspects of the components described below may be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

[0020] In this specification, the terms indicating directions are defined as shown in FIG. 1. Specifically, in the following description, the "front-rear direction" means the front-rear direction as seen by a person sitting in the vehicle seat, and is the direction that coincides with the vehicle's traveling direction. The "seat width direction" means the width direction of the vehicle seat, and coincides with the left-right direction as seen by a person sitting in the vehicle seat. Additionally, the "up-down direction" means the height direction of the vehicle seat, and coincides with the up-down direction as seen by the vehicle seat from the front.

[0021] [1. Vehicle seats S] The vehicle seat S according to this embodiment has an appearance as shown in FIG. 1. In FIG. 1, a part of the vehicle seat S is shown with a trim cover removed for convenience of illustration. The vehicle seat S has as its main components a seat back S1 which is a backrest portion supporting the back of a seated occupant, a seat cushion S2 which is a seating portion supporting the buttocks of the seated occupant, and a headrest S3 which is disposed on the upper part of the seat back S1 and supports the head of the seated occupant. As shown in FIG. 2, the vehicle seat S has a seat frame F as a skeleton, the main components of which are a seat back frame F1 and a seat cushion frame F2.

[0022] The seat back S1 is constructed by placing a seat back pad S11 on a seat back frame F1, and further covering the seat back pad S11 with a trim cover S12. The seat cushion S2 is constructed by placing a seat cushion pad S21 on a seat cushion frame F2, which serves as a framework, and further covering the seat cushion pad S21 with a trim cover S22. The head rest S3 is formed by disposing a head rest pad S31 on a core material (not shown), and covering it with a trim cover S32. The seat back pad S11 of the seat back S1 and the seat cushion pad S21 of the seat cushion S2 are urethane base materials molded by foam molding using a urethane foam material.

[0023] The seat cushion frame F2 is connected to an upper rail RU of a slide rail device R disposed below the seat cushion frame F2. With this configuration, when the upper rail RU moves along the lower rail RL fixed to the vehicle floor, the entire vehicle seat S including the seat cushion frame F2 slides.

[0024] In this embodiment, the seat cushion frame F2 is connected to the upper rail RU via a rotating link XL as shown in Fig. 2. The rotating links XL are link members disposed on both sides of the seat cushion S2 in the width direction and rotate around a rotation axis along the width direction. The rotating links XL rotate together with the seat cushion S2, thereby adjusting the position of the seat cushion S2 in the up-down direction.

[0025] The lower end of the seatback frame F1 is connected to the rear end of the seat cushion frame F2 via a reclining device 80 as a movable mechanism. The reclining device 80 connects the seatback S1 including the seatback frame F1 to the seat cushion S2 in a state in which the inclination angle of the seatback S1 relative to the seat cushion S2 can be adjusted. In other words, the seatback S1 can rotate relatively to the seat cushion S2 around a reclining shaft 81 along the width direction.

[0026] [2. Seat back frame F1] Hereinafter, the configuration of the seatback frame F1 of the vehicle seat S will be described with reference to Figures 2 and 3. As shown in Figure 2, the seatback frame F1 forms a rectangular frame when the seat frame F is viewed from the front.

[0027] 2 and 3, the seatback frame F1 has a pair of side frames 10 provided at both ends in the seat width direction. As shown in the figures, the seatback frame F1 also has an upper frame 11 that is attached to the upper ends of the side frames 10 to connect the side frames 10. As shown in the figures, the seatback frame F1 also has a lower member frame 12 that is attached to the lower ends of the side frames 10 to connect the side frames 10. Furthermore, an S-spring 15 that supports the back of the occupant from behind is installed between the side frames 10.

[0028] The upper frame 11 is a part formed into a downward U-shape when viewed from the front, and is made of a hollow metal pipe member. However, this is not limiting, and the upper frame 11 may be made of a solid member. Both free ends of the upper frame 11 are joined to the upper parts of the left and right side frames 10, respectively. A square cylindrical pillar guide 11a that supports a headrest pillar is attached to the front surface of the horizontal portion of the upper frame 11 that is located at the top. A pair of pillar guides 11a are provided with a gap in the width direction.

[0029] Next, the side frame 10 has a spindle-shaped external shape in a side view. That is, when the side frame 10 is viewed from the side, the front end of the side frame 10 bulges out in an arc shape from a midpoint in the up-down direction. When the vehicle seat S is in use (more precisely, when the seat back S1 is in the reference position), the side frame 10 extends long in a direction slightly inclined (tilted backward) with respect to the vertical direction.

[0030] Next, a description will be given of the lower member frame 12. The lower member frame 12 is formed by processing sheet metal, and is installed between the lower ends of the side frames 10. Furthermore, the upper and lower edge portions of the lower member frame 12 are each formed to have a shape that is bent forward.

[0031] The connecting frame 13 extends along the seat width direction to support the outermost vertical wires 51 in the seat width direction, and connects the extending portions 11b of the upper frames 11 together. The connecting frame 13 is made of a metal plate having a predetermined shape.

[0032] [3. Features of the seat frame F] The seat back frame F1 of this embodiment is provided with a lumbar support 50 (lumbar support device, lumbar support). The lumbar support 50 is configured in a lattice shape with a pair of vertical wires 51 extending in the up-down direction and multiple horizontal wires 52 that span the pair of vertical wires 51 in the seat width direction, and has a central connecting member 53 that spans the central portions of the multiple horizontal wires 52 in the up-down direction. The lumbar support 50 also includes an adjustment mechanism 70 and a wire member 71.

[0033] Specifically, as shown in Figures 2 and 3, the lumbar support 50 has vertical wires 51 (left and right linear members) extending in the up-down direction at both left and right edges, a central connecting member 53 extending in the up-down direction between them, and a plurality of horizontal wires 52 (horizontal spring members) connecting the vertical wires 51 and the central connecting member 53 to each other in the left-right direction of the seat. The lumbar support 50 is configured as a spring assembly in which the vertical wires 51, the horizontal wires 52, and the central connecting member 53 are joined to each other by welding or the like. The lumbar support 50 is capable of stretching and deforming in the left-right direction by the plurality of horizontal wires 52.

[0034] Next, the mounting structure of the lumbar support 50 to the seat back frame F1 will be described. The upper part of the lumbar support 50 is connected to and supported by the connecting frame 13 of the seat back frame F1 by a vertical wire 51. In this embodiment, the upper part of the lumbar support 50 is supported by the connecting frame 13, and this allows the lower part of the lumbar support 50 to be displaced particularly in the front-rear direction of the seat back. The lower part of the lumbar support 50 is connected to an adjustment mechanism 70 (lumbar adjustment mechanism) as described later.

[0035] 2 and 3, the adjustment mechanism 70 mainly includes two wire members 71, an operating lever 72, and a winding mechanism 74 that is connected to the adjustment mechanism 70 and winds up the cable wire 73. Outer ends of the wire members 71 in the seat width direction are fixed to the side frames 10. One end of the cable wire 73 is attached to the winding mechanism 74, and the other end is connected to the adjustment mechanism 70.

[0036] With this configuration, when the operating lever 72 is operated to cause the winding mechanism 74 to wind up the cable wire 73, the two wire members 71 connected to the adjustment mechanism 70 bend so as to protrude forward, causing the lower portion of the lumbar support 50 to elastically bend forward at the center.

[0037] With this structure, the lumbar support 50 can change the support position of the waist of the seated person. Specifically, when the cable wire 73 is not wound up, the wire member 71 is not pulled, and the wires (vertical wires 51, horizontal wires 52, and central connecting member 53) constituting the lumbar support 50 are in a flat state without bending, as shown in Fig. 2. On the other hand, when the operating lever 72 is operated to cause the winding mechanism 74 to wind up the cable wire 73, the wire member 71 is pulled, and the wires (vertical wires 51, horizontal wires 52, and central connecting member 53) constituting the lumbar support 50 bend forward at the center.

[0038] At this time, the bent lumbar support 50 also bends the seat back pad S11 forward, and the bent seat back pad S11 pushes the lumbar region of the seated person from the rear to the front. This changes the support position of the lumbar region of the seated person. That is, the amount of bending (the amount of protrusion forward) of each wire changes according to the amount of operation of the operating lever 72 (in other words, the amount of winding of the cable wire 73), and the support position of the lumbar region of the seated person is changed as desired. This allows the lumbar region of the seated person to be properly supported.

[0039] In addition, the seat back S1 on which the lumbar support 50 is provided is also provided with a sensor 60, which is a Doppler type biosensor. The sensor 60 is a sensor that detects the bioinformation of the seated occupant. The bioinformation of the seated occupant is information indicating the heart rate, pulse rate, pulse volume, respiratory rate, and respiratory volume. In other words, the sensor 60 is a biosensor that can detect the heart rate and respiration of the seated occupant.

[0040] In detail, the sensor 60 is composed of an irradiation unit 61 that irradiates radio waves, a receiving unit 62 that receives the radio waves, and a resin housing 63 that contains the irradiation unit 61 and the receiving unit 62. The radio waves irradiated by the receiving unit 62 may be any radio waves having a frequency that is reflected by the skin surface of a living body, but it is usually preferable that the radio waves are microwaves.

[0041] As described above, the sensor 60 disposed inside the seat back pad S11 irradiates radio waves from the irradiation unit 61 toward the seating surface of the seat back S1. At this time, the radio waves irradiated by the irradiation unit 61 are reflected by the skin surface of the seated person, and the reflected radio waves are received by the receiving unit 62. Since the skin surface of the seated person moves minutely due to the heartbeat and breathing, the frequency of the radio waves irradiated by the irradiation unit 61 is different from the frequency of the radio waves received by the receiving unit 62. Therefore, based on the difference between the frequency of the radio waves irradiated by the irradiation unit 61 and the frequency of the radio waves received by the receiving unit 62, the biological information of the seated person, that is, the respiratory rate, heart rate, etc., are detected. In other words, the biological information of the seated person is detected by utilizing the Doppler effect.

[0042] In this way, the sensor 60 detects the biological information of the seated occupant based on the minute movements of the skin surface of the seated occupant, so the location where the sensor 60 is installed is limited. More specifically, the sensor 60 has a resin housing and has a predetermined hardness, so that the sensor 60 is not exposed to the seating surface of the seat back pad S11 in order to prevent the occupant from feeling uncomfortable when sitting. For this reason, the sensor 60 is installed behind the horizontal wire 52 so as not to be exposed to the seating surface of the seat back pad S11.

[0043] Specifically, the lumbar support 50 is configured in a lattice pattern on the inside of the seatback frame F1 with a pair of vertical wires 51 extending in the vertical direction and a number of horizontal wires 52 that span the pair of vertical wires 51 in the seat width direction, and the sensor 60 is positioned rearward of the horizontal wires 52 so as to span any two of the horizontal wires 52 in the vertical direction (Figures 2 and 3).

[0044] In the vehicle seat S of this embodiment configured in this manner, the sensor 60 can be placed on the back of the lattice-shaped lumbar support 50 made of wire, making it possible for the sensor 60 to properly detect biometric information while ensuring freedom in the layout of the sensor 60.

[0045] 3 and 4, the sensor 60 is provided with a wire engaging portion 65 on a front surface 64 of the housing 63, which grips and holds the horizontal wire 52. The shape of the wire engaging portion 65 can be, for example, a C-shaped cross section that fits with the horizontal wire 52.

[0046] Furthermore, the lumbar support 50 includes a central connecting member 53 that spans the central portions of the horizontal wires 52 in the vertical direction, and the sensor 60 is disposed at a position that avoids the central connecting member 53. With this configuration, the sensor 60 can be disposed while appropriately avoiding the central connecting member 53 that extends in the vertical direction, and the sensor 60 can appropriately detect biological information.

[0047] In addition, an adjustment mechanism 70 is provided for adjusting the position of the lumbar support 50 in the front-rear direction, and the adjustment mechanism 70 has an operating lever 72 provided on the seat back frame F1. According to this configuration, the position of the lumbar support 50 in the front-rear direction can be adjusted by the operating lever 72.

[0048] Also, a cable wire 73 extending from the adjustment mechanism 70 to the lumbar support 50 is provided, and the sensor 60 is disposed at a position avoiding the cable wire 73. According to such a configuration, the sensor 60 is disposed while appropriately avoiding the cable wire 73 extending from the adjustment mechanism 70 to the lumbar support 50, and the sensor 60 can appropriately detect biological information.

[0049] In addition, a power motor M is attached to the seatback frame F1 to electrically drive a reclining device 80, which is a movable mechanism of the vehicle seat S. With this configuration, the reclining device 80, which is a movable mechanism of the vehicle seat S, can be electrically driven by the power motor M.

[0050] Furthermore, when the lumbar support 50 is positioned at the rearmost position (FIG. 2), the sensor 60 is disposed rearward of the power motor M and the adjustment mechanism 70 in a side view of the vehicle seat S. According to this configuration, by disposing the sensor 60 rearward of the power motor M and the adjustment mechanism 70, it is possible to ensure freedom in the layout of the sensor 60 while allowing the sensor 60 to appropriately detect biological information.

[0051] The sensor 60 also includes an irradiation unit 61 that irradiates radio waves, a receiving unit 62 that receives radio waves reflected from a seated occupant, and a housing 63 that contains the irradiation unit 61 and the receiving unit 62. A front surface 64 of the sensor 60 is provided with a plurality of wire engagement units 65 that engage with the horizontal wire 52 (FIGS. 3 and 4). With this configuration, the sensor 60 can be easily attached to the horizontal wire 52 by engaging the wire engagement units 65 with the horizontal wire 52.

[0052] Moreover, in the vertical direction, the irradiation unit 61 and the receiving unit 62 are disposed between the multiple wire engaging portions 65 (FIGS. 3 and 4). With this configuration, the irradiation unit 61 and the receiving unit 62 are disposed so as to avoid the multiple wire engaging portions 65. In other words, the wire engaging portions 65 are not disposed on the irradiation unit 61 and the receiving unit 62. This enables the sensor 60 to properly detect the biological information of the seated occupant.

[0053] The vehicle seat S of this embodiment includes a headrest S3 for supporting the head of a seated occupant, a seat cushion S2 for supporting the buttocks of the seated occupant, a seat cushion frame F2 for forming the framework of the seat cushion S2, a slide rail device R arranged at the bottom of the seat cushion frame F2, a seat back pad S11 placed on the seat back frame F1, a seat cushion pad S21 placed on the seat cushion frame F2, a trim cover S12 for covering the seat back pad S11, and a trim cover S22 for covering the seat cushion pad S21. With this configuration, it is possible to provide a vehicle seat S including a sensor 60 and a lumbar support 50.

[0054] <Modification> Although the configuration of the vehicle seat S according to this embodiment has been described above, the above embodiment is merely an example for facilitating understanding of the present invention and does not limit the present invention. In other words, the present invention can be modified and improved without departing from the spirit and scope of the present invention, and of course, the present invention includes equivalents thereof.

[0055] In the above embodiment, the shape of the wire engagement portion 65 was a hook portion with a C-shaped cross section, but this is not limited to this. As shown in a side view of a modified sensor 60X in Figure 5, any shape can be adopted as long as it can engage with the horizontal wire 52, such as a wire engagement portion 65Xa (hook portion) with an L-shaped cross section extending in the vertical direction, or a wire engagement portion 65Xb (clamping portion) of a type that clamps from above and below.

[0056] In the above embodiment, the sensor 60 spans two adjacent horizontal wires 52 in the vertical direction among the multiple horizontal wires 52, but as an example shown in Fig. 5, the sensor 60 may span three adjacent horizontal wires 52 in the vertical direction. In other words, the sensor 60 may span three or more horizontal wires 52 as long as it spans any two horizontal wires 52 among the multiple horizontal wires 52, or may span only two of the adjacent three horizontal wires 52, the upper and lower horizontal wires 52.

[0057] In the above embodiment, the sensor 60 is disposed to the right in the sheet width direction, but the sensor 60 may be disposed to the left in the sheet width direction.

[0058] The vehicle seat according to the present embodiment has been described above by taking the vehicle seat mounted on a vehicle as an example. The vehicle seat according to the present embodiment is not limited to a vehicle seat mounted on a ground-traveling vehicle having wheels such as an automobile or a train, but may be a seat mounted on an aircraft or a ship that moves on a road other than the ground. [Explanation of symbols]

[0059] S Vehicle seats (vehicle seats) S1 Seat Back S11 Seat back pad (pad material) S12 Trim cover (skin material) S2 Seat Cushion S21 Seat cushion pad (pad material) S22 Trim cover (skin material) S3 Headrest S31 Headrest pad (pad material) S32 Trim cover (skin material) R Slide rail device RU Upper Rail RL Lower rail XL Pivot Link Seat frame, front F1 seat back frame F2 seat cushion frame 10 Side frame 11 Upper frame 11a Pillar Guide 11b Extension part 12 Lower member frame 13 Connecting frame 50 Lumbar Support 51 Vertical Wire 52 Horizontal wire 53 Central connecting member 60,60X Sensor 61 Irradiation unit 62 Receiving section 63 Housing 64 Front 65, 65Xa, 65Xb Wire engagement part 70 Adjustment mechanism 71 Wire material 72 Operating lever 73 Cable Wire (Cable) 74 Winding mechanism 80 Reclining device (movable mechanism) 81 Reclining axis M Power Motor

Claims

1. A vehicle seat having a seat back, The seat back is A seat back frame that constitutes a framework of the seat back; A lumbar support is disposed on the seat back frame and supports a lower back of a seated occupant; A sensor for detecting the state of the seated occupant, The lumbar support is configured in a lattice shape on the inside of the seat back frame by a pair of vertical wires extending in the up-down direction of the vehicle seat and a plurality of horizontal wires spanning the pair of vertical wires in the width direction of the vehicle seat, the sensor is disposed on a rear side of the transverse wires so as to span any two of the transverse wires in a vertical direction of the vehicle seat, the vehicle seat includes an adjustment mechanism for adjusting a position of the lumbar support in a front-rear direction of the vehicle seat, a power motor is attached to the seat back frame for electrically driving a movable mechanism of the vehicle seat; The vehicle seat, wherein the sensor is disposed rearward of the power motor and the adjustment mechanism in a side view of the vehicle seat when the lumbar support is positioned at the rearmost position.

2. The lumbar support includes a central connecting member that spans central portions of the plurality of lateral wires in a vertical direction of the vehicle seat, 2. The vehicle seat according to claim 1, wherein the sensor is disposed at a position avoiding the central connecting member.

3. A vehicle seat as described in claim 1 or 2, characterized in that the adjustment mechanism has an operating lever provided on the seat back frame.

4. a cable extending from the adjustment mechanism to the lumbar support; 4. The vehicle seat according to claim 3, wherein the sensor is disposed at a position avoiding the cable.

5. A seat cushion for supporting the buttocks of the seated person, 5. The vehicle seat according to claim 1, wherein the movable mechanism is a reclining device that adjusts a tilt angle of the seat back relative to the seat cushion.

6. The sensor includes an irradiation unit that irradiates radio waves, a receiving unit that receives the radio waves reflected from the seated occupant, and a housing that contains the irradiation unit and the receiving unit, 6. The vehicle seat according to claim 1, wherein a front surface of the sensor is provided with a plurality of wire engaging portions for engaging with the lateral wires.

7. The wire engaging portion is an upper hook portion and a lower hook portion each having an L-shaped cross section extending in a vertical direction and adapted to engage with the horizontal wire; a clamping portion provided between the upper hook portion and the lower hook portion and configured to clamp the horizontal wire from above and below, 7. The vehicle seat according to claim 6, wherein the upper hook portion, the lower hook portion and the clamping portion are engaged with three of the horizontal wires adjacent to each other in the vertical direction.

8. 8. The vehicle seat according to claim 6, wherein the irradiating portion and the receiving portion are disposed among a plurality of the wire engaging portions in a vertical direction of the vehicle seat.

9. A headrest for supporting the head of the seated occupant; A seat cushion that supports the buttocks of the seated occupant; A seat cushion frame that constitutes a skeleton of the seat cushion; A slide rail disposed at a lower portion of the seat cushion frame; a pad member placed on the seat back frame and the seat cushion frame; 9. The vehicle seat according to claim 1, further comprising: a trim cover that covers the pad member.

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