Vehicle seats

Abstract

To provide a vehicle seat capable of enhancing the attachment rigidity of a radio wave sensor.SOLUTION: A vehicle seat includes a seat cushion, a seat back, a plate-like pressure receiving member 200 for receiving a load from a sitting person, and a radio wave sensor 100 for detecting a reflection wave of a radio wave irradiated toward the sitting person to acquire information on the sitting person, and fixed to the pressure receiving member 200. The pressure receiving member 200 includes a plurality of first ribs (223, 224A) protruding backward from a rear face 210B being a face of a rear side, and a plurality of second ribs (232, 234) protruding backward from the rear face 210B, and crossing the plurality of first ribs. The radio wave sensor 100 has a fixing part 130 fixed to the pressure receiving member 200. The fixing part 130 includes a first fixing part 131 fixed to a surrounding area (a first fixing area 214) surrounded by the plurality of first ribs and the plurality of second ribs in the rear face 210B.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a vehicle seat including a seat cushion and a seat back.

Background Art

[0002] Conventionally, as a vehicle seat, there is known one including a plate-shaped pressure receiving member that receives a load from a seated person (Patent Document 1). In this technology, the pressure receiving member is provided in the seat back and is configured to be movable rearward while receiving a load from the seated person.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in recent years, a vehicle seat may be provided with a radio wave sensor in order to detect the heartbeat, breathing, etc. of a seated person. When such a radio wave sensor is attached to the pressure receiving member as described above, it is desirable that the attachment rigidity of the radio wave sensor is high.

[0005] Therefore, an object of the present invention is to provide a vehicle seat capable of increasing the attachment rigidity of a radio wave sensor. Another object is to suppress the occurrence of weight bias in the pressure receiving member. Another object is to ensure the amount of deflection of the pressure receiving member. Another object is to attach the radio wave sensor to the pressure receiving member relatively easily.

Means for Solving the Problems

[0006] The vehicle seat for achieving the above object is a vehicle seat including a seat cushion and a seat back, and includes a plate-shaped pressure receiving member that receives the load from the seated person, and a radio wave sensor that detects the reflected wave of the radio wave irradiated toward the seated person and acquires information about the seated person, and the radio wave sensor fixed to the pressure receiving member. The pressure receiving member has a plurality of first ribs protruding from the back surface, which is the surface on the side opposite to the seated person side, to the side opposite to the seated person side, and a plurality of second ribs protruding from the back surface to the side opposite to the seated person side, and the plurality of second ribs intersect the plurality of first ribs. The radio wave sensor has at least one fixing portion fixed to the pressure receiving member, and the fixing portion includes a first fixing portion fixed to an enclosed area surrounded by the plurality of first ribs and the plurality of second ribs on the back surface.

[0007] According to such a configuration, since the enclosed area surrounded by the ribs of the pressure receiving member is a portion with high rigidity and difficult to deform, the mounting rigidity of the radio wave sensor can be increased by fixing the radio wave sensor to the enclosed area.

[0008] In the above-described vehicle seat, the radio wave sensor can be configured to have a plurality of the first fixing portions.

[0009] According to this, since a plurality of portions of the radio wave sensor are fixed to the enclosed area of the pressure receiving member, the mounting rigidity of the radio wave sensor can be further increased.

[0010] In the above-described vehicle seat, the pressure receiving member can have a plurality of the enclosed areas, and the first fixing portions can be fixed to different enclosed areas.

[0011] According to this, the area of each enclosed area can be reduced, so that the rigidity of each enclosed area can be made higher. And by fixing the first fixing portions of the radio wave sensor to the enclosed areas with high rigidity respectively, the mounting rigidity of the radio wave sensor can be further increased.

[0012] In the above-described vehicle seat, the surrounding region can be configured such that at least one is provided on each of the left and right sides of the center of the pressure receiving member in the left-right direction.

[0013] According to this, since the radio wave sensor can be arranged so as to straddle the center in the left-right direction of the pressure receiving member, it is possible to suppress the occurrence of a weight bias in the pressure receiving member to which the radio wave sensor is attached.

[0014] In the above-described vehicle seat, the pressure receiving member and the radio wave sensor can be configured to be provided on the seat back.

[0015] In the above-described vehicle seat, the radio wave sensor can be configured to be arranged below the pressure receiving member.

[0016] According to this, it is possible to secure the amount of deflection of the upper part of the pressure receiving member.

[0017] The above-described vehicle seat includes a mounting wire for mounting the pressure receiving member to the frame of the vehicle seat. The mounting wire is a pair of extending portions extending in a direction orthogonal to the left-right direction, and has a pair of extending portions for supporting the pressure receiving member. The surrounding region can be configured to be provided between the pair of extending portions in the left-right direction.

[0018] According to this, since both the left and right sides of the surrounding region are supported by the mounting wire, the mounting rigidity of the radio wave sensor can be further increased.

[0019] In the above-described vehicle seat, the fixing portion can be configured to be fixed to the pressure receiving member by a screw.

[0020] According to this, the radio wave sensor can be attached to the pressure receiving member relatively easily.

[0021] In the above-described vehicle seat, the radio wave sensor can be configured as a sensor that detects at least one of the heartbeat and respiration of the seated person.

Advantages of the Invention

[0022] According to the present invention, the mounting rigidity of the radio wave sensor can be increased.

[0023] Further, by configuring the radio wave sensor to have a plurality of first fixing portions, the mounting rigidity of the radio wave sensor can be further increased.

[0024] Further, by fixing the first fixing portions to different surrounding regions, the mounting rigidity of the radio wave sensor can be further increased.

[0025] Further, by providing at least one surrounding region on each of the left and right sides of the center in the left-right direction of the pressure receiving member, it is possible to suppress the occurrence of weight bias in the pressure receiving member.

[0026] Further, by disposing the radio wave sensor below the pressure receiving member, it is possible to ensure the amount of deflection of the upper portion of the pressure receiving member.

[0027] Further, by providing the surrounding region between a pair of extending portions of the mounting wire in the left-right direction, the mounting rigidity of the radio wave sensor can be further increased.

[0028] Further, by fixing the fixing portion to the pressure receiving member with a screw, the radio wave sensor can be relatively easily attached to the pressure receiving member.

Brief Description of the Drawings

[0029]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying out the Invention

[0030] Next, the embodiments will be described in detail with appropriate reference to the drawings. In this specification, front and rear, left and right, and up and down are based on the front and rear, left and right, and up and down as seen by a person sitting on the seat (the seated person). Also, in this embodiment, the front side corresponds to the "seated person side", and the rear side corresponds to the "side opposite to the seated person side".

[0031] As shown in FIG. 1, a vehicle seat S as an example of a vehicle seat is a seat mounted on a vehicle such as an automobile, and a pad made of urethane foam or the like and a skin made of fabric or leather are covered on a seat frame F (see FIG. 2) which is a frame of the vehicle seat S.

[0032] Specifically, the vehicle seat S includes a seat cushion S1, a seat back S2, and a headrest S3. The seat cushion S1 is composed of covering a seat cushion frame F1 (see FIG. 2) with a seat cushion pad P1 and a seat cushion skin U1. Also, the seat back S2 is composed of covering a seat back frame F2 (see FIG. 2) with a seat back pad P2 and a seat back skin U2.

[0033] As shown in FIG. 2, the seat frame F includes a seat cushion frame F1 and a seat back frame F2, and the seat back frame F2 is connected to the rear end portion of the seat cushion frame F1 via a reclining mechanism.

[0034] The seat back frame F2 includes a pair of sheet metal frames 12 arranged apart from each other left and right, and a pipe frame 13 formed by bending a pipe material into a U shape and connected to the upper ends of each of the pair of sheet metal frames 12.

[0035] The pipe frame 13 extends straight up from the sheet metal frame 12 and has a pair of upper side frames 13A that slope slightly inward to the left and right. The left and right sheet metal frames 12 and upper side frames 13A are a pair of side frames 11 spaced apart from each other left and right. Further, the pipe frame 13 has an upper frame 13B that connects the upper ends of the pair of upper side frames 13A, that is, the upper ends of the side frames 11.

[0036] Also, the seat back frame F2 has a lower frame 14 that connects the lower parts of the side frames 11, specifically the lower parts of the sheet metal frames 12, and a cross frame 15 that connects the upper parts of the side frames 11, specifically the left and right upper side frames 13A, at a position below the upper frame 13B.

[0037] The lower frame 14 and the cross frame 15 are members made of sheet metal. The lower frame 14 extends long in the left - right direction, and the left and right ends are fixed by welding to the portions extending inside the left and right of the sheet metal frame 12. The cross frame 15 extends long in the left - right direction, and the left and right ends are fixed by welding to the upper side frames 13A.

[0038] The vehicle seat S further includes a pressure - receiving member 200, an attachment wire 250 for attaching the pressure - receiving member 200 to the seat back frame F2, and a plurality of attachment clips 260 (see FIG. 3).

[0039] The pressure - receiving member 200 is a plate - shaped member that receives the load from the seated person via the seat back pad P2 (see FIG. 1) and is provided on the seat back S2. The pressure - receiving member 200 is made of resin or the like. The pressure - receiving member 200 is configured to be substantially symmetric about the center in the left - right direction. The pressure - receiving member 200 has a pressure - receiving member body 210, and the pressure - receiving member body 210 has a central portion 211 located at the center in the left - right direction, and a first side portion 212 and a second side portion 213 disposed on both the left and right sides of the central portion 211.

[0040] The central part 211 is a part that supports the back and waist of the seated person from directly behind. The first side part 212 and the second side part 213 extend obliquely forward to the left and right outside from both left and right ends of the central part 211 so as to be positioned forward as they go outward in the left - right direction.

[0041] The first side part 212 is a part that supports the left and right side parts of the back of the seated person from obliquely behind. The first side part 212 has a narrow - width plate shape with a vertical length smaller than the horizontal length, and five are provided side - by - side in the vertical direction on both the left and right sides of the central part 211. The second side part 213 is a part that supports the left and right side parts of the waist of the seated person from obliquely behind and is arranged below the first side part 212. The second side part 213 has a plate shape with a vertical length larger than the horizontal length and extends obliquely forward to the left and right outside from the lower parts of both left and right ends of the central part 211. The first side part 212 and the second side part 213 are formed to be moderately flexible so that they can softly receive the side part of the seated person.

[0042] As shown in FIG. 3, the pressure - receiving member 200 further has a plurality of horizontal ribs 220 and a plurality of vertical ribs 230. The horizontal ribs 220 and the vertical ribs 230 protrude rearward from the back surface 210B which is the rear - side surface of the pressure - receiving member main body 210. The horizontal ribs 220 extend in the left - right direction, and the vertical ribs 230 extend in a direction orthogonal to the left - right direction, specifically, in the vertical direction. The vertical ribs 230 are formed so as to intersect with the plurality of horizontal ribs 220.

[0043] The plurality of horizontal ribs 220 extending left and right include a first horizontal rib 221, a second horizontal rib 222, a third horizontal rib 223, a fourth horizontal rib 224, and a fifth horizontal rib 225. The first horizontal rib 221 is a rib formed at the upper - end part of the central part 211. The first horizontal rib 221 is positioned above the first side part 212 which is located at the uppermost position in the vertical direction.

[0044] The second horizontal rib 222 is a rib formed across the rear surface of one of the left and right first side portions 212, the rear surface of the central portion 211, and the rear surface of the other of the left and right first side portions 212. Five second horizontal ribs 222 are formed corresponding to the five pairs of first side portions 212.

[0045] The third horizontal rib 223 and the fourth horizontal rib 224 are ribs formed across the rear surface of one of the left and right second side portions 213, the rear surface of the central portion 211, and the rear surface of the other of the left and right second side portions 213. The third horizontal rib 223 is located at substantially the same position as the upper end of the second side portion 213 in the vertical direction. The fourth horizontal rib 224 is located at substantially the same position as the vicinity of the central portion of the second side portion 213 in the vertical direction. The fourth horizontal rib 224 has an upper fourth horizontal rib 224A and a lower fourth horizontal rib 224B.

[0046] The fifth horizontal rib 225 is a rib formed at the lower end of the central portion 211. The fifth horizontal rib 225 is located below the fourth horizontal rib 224 (224B) in the vertical direction.

[0047] A plurality of vertically extending vertical ribs 230 include a first vertical rib 231, a second vertical rib 232, a third vertical rib 233, a fourth vertical rib 234, and a fifth vertical rib 235. The first vertical rib 231 is a rib formed at both left and right ends of the rear surface of the central portion 211. The upper end of the first vertical rib 231 is connected to the first horizontal rib 221, and the lower end is connected to the fourth horizontal rib 224B.

[0048] The second vertical rib 232 is a rib formed inside the first vertical rib 231 in the left - right direction. Two second vertical ribs 232 are formed side by side in the left - right direction. The upper end of the second vertical rib 232 extends to the upper end of the central portion 211, and the lower end is connected to the fourth horizontal rib 224B. Between the first vertical rib 231 and the second vertical rib 232 in the left - right direction, an extending portion 251 of a mounting wire 250, which will be described later, is located. In other words, the extending portion 251 is disposed between the first vertical rib 231 and the second vertical rib 232 in the left - right direction.

[0049] The third vertical rib 233 is a rib formed inside the second vertical rib 232 in the left - right direction and above the central portion 211. Four third vertical ribs 233 are formed side by side in the left - right direction. The upper end of the third vertical rib 233 extends to the upper end of the central portion 211, and the lower end is connected to the second horizontal rib 222 located second from the top.

[0050] The fourth vertical rib 234 is a rib formed inside the second vertical rib 232 in the left - right direction and below the central portion 211. Two fourth vertical ribs 234 are formed side by side in the left - right direction. The upper end of the fourth vertical rib 234 is connected to the third horizontal rib 223, and the lower end extends to the lower end of the central portion 211.

[0051] The fifth vertical rib 235 is a rib formed at the left - right outer ends of the rear surface of the second side portion 213 respectively. The upper end of the fifth vertical rib 235 is connected to the left - right outer ends of the third horizontal rib 223. Also, the left - right outer ends of the fourth horizontal rib 224 are connected to the fifth vertical rib 235.

[0052] As shown in FIG. 4, the pressure - receiving member main body 210 (central portion 211) has a first fixing region 214 and a second fixing region 215 to which a radio wave sensor 100 described later is fixed. The pressure - receiving member 200 has a plurality of, specifically, two first fixing regions 214 and two second fixing regions 215 respectively.

[0053] The first fixing region 214 is a region surrounded by the third horizontal rib 223 and the fourth horizontal rib 224A, and the second vertical rib 232 and the fourth vertical rib 234. In the vertical direction, the first fixing region 214 is located at substantially the same position as the upper end of the second side portion 213. The two first fixing regions 214 are arranged spaced apart from each other in the left - right direction. The first fixing regions 214 are provided one on each of the left and right sides of the center of the pressure - receiving member 200 in the left - right direction. Also, the first fixing region 214 is provided between the pair of left - right extending portions 251 of the mounting wire 250 in the left - right direction.

[0054] Here, in the present embodiment, the third horizontal rib 223 and the fourth horizontal rib 224A correspond to the "plurality of first ribs", the second vertical rib 232 and the fourth vertical rib 234 correspond to the "plurality of second ribs", and the first fixing region 214 corresponds to the "surrounding region".

[0055] The second fixing region 215 is an inner region of a substantially U-shaped portion formed by the fourth horizontal rib 224B, the fifth horizontal rib 225, and the fourth vertical rib 234. The second fixing region 215 is located at substantially the same position as the lower end of the second side portion 213 in the vertical direction. The two second fixing regions 215 are arranged to be separated from each other in the left-right direction. The second fixing region 215 is arranged below the corresponding first fixing region 214 in the left-right direction. Specifically, the left second fixing region 215 is arranged below the left first fixing region 214, and the right second fixing region 215 is arranged below the right first fixing region 214.

[0056] Through holes 216 for passing screws 190 (see FIG. 5) are respectively formed in the first fixing region 214 and the second fixing region 215.

[0057] Returning to FIG. 3, the mounting wire 250 is a member formed by bending a wire made of metal into a substantially U shape, and has a pair of left and right extending portions 251 extending in the vertical direction, a pair of upper mounting portions 252 extending upward from the upper ends of the respective extending portions 251, and a lower mounting portion 253 connecting the lower portions of the left and right extending portions 251. The pair of left and right extending portions 251 are portions for supporting the pressure receiving member 200. The mounting wire 250 is integrated with the pressure receiving member 200 by insert molding the pair of left and right extending portions 251 into the pressure receiving member 200. A plurality of mounting clips 260 are attached to the lower mounting portion 253.

[0058] The pressure-receiving member 200 is attached to the seat back frame F2 by inserting the upper attachment portion 252 of the attachment wire 250 into a through-hole (not shown) formed in the cross-linking frame 15 and engaging the attachment clip 260 with a through-hole (not shown) formed in the lower frame 14. The pressure-receiving member 200 is configured to be movable rearward while receiving a load from the seated person. When the vehicle seat S is rear-ended by another vehicle or the rear part of a vehicle moving backward collides with another vehicle or a structure, and the pressure-receiving member 200 receives a rearward load exceeding a predetermined value from the seated person, the vehicle seat S can move rearward, thereby reducing the impact applied to the neck of the seated person.

[0059] As shown in FIG. 4, the vehicle seat S further includes a radio wave sensor 100. The radio wave sensor 100 is a sensor that detects a reflected wave of a radio wave irradiated toward the seated person and acquires information regarding the seated person. Information regarding the seated person is, for example, information indicating the heart rate, pulse rate, magnitude of the pulse, respiration rate, magnitude of the respiration, etc. of the seated person. In other words, the radio wave sensor 100 is a sensor that detects at least one of the heart beat and respiration of the seated person.

[0060] As shown in FIG. 5, the radio wave sensor 100 includes a sensor unit 110 for acquiring information regarding the seated person, a case 120 that houses the sensor unit 110, and a plurality of fixing parts 130. The sensor unit 110 includes an irradiation unit 111 that irradiates the seated person with radio waves and a detection unit 112 that detects a reflected wave of the radio wave reflected from the skin surface of the seated person. As the sensor unit 110 of the radio wave sensor 100, for example, a microwave Doppler sensor or the like can be used.

[0061] Similar to the pressure-receiving member 200, the radio wave sensor 100 is provided on the seat back S2. Specifically, the radio wave sensor 100 is fixed to the pressure-receiving member 200. The fixing part 130 is a part that is fixed to the pressure-receiving member 200.

[0062] As shown in FIG. 4, four fixing parts 130 are provided and arranged one by one at the four corners of the front side surface of the case 120. Each fixing part 130 has a substantially cylindrical fixing part main body 130A provided so as to protrude from the case 120, and a plurality of reinforcing ribs 130B protruding from the outer peripheral surface of the fixing part main body 130A. Four reinforcing ribs 130B are provided and arranged at equal intervals in the circumferential direction of the fixing part main body 130A. The rear ends of the reinforcing ribs 130B are connected to the case 120.

[0063] The fixing part 130 includes a first fixing part 131 and a second fixing part 132. The radio wave sensor 100 has a plurality of first fixing parts 131 and second fixing parts 132 respectively. Specifically, the radio wave sensor 100 has two first fixing parts 131 and two second fixing parts 132.

[0064] The first fixing part 131 is a fixing part fixed to the first fixing area 214 on the back surface 210B of the pressure receiving member main body 210. The first fixing parts 131 are arranged at the upper end part of the front side surface of the case 120, spaced apart from each other left and right. The first fixing parts 131 are fixed to different first fixing areas 214 respectively. Specifically, one first fixing part 131 is fixed to the left first fixing area 214, and the other first fixing part 131 is fixed to the right first fixing area 214.

[0065] The second fixing part 132 is a fixing part fixed to the second fixing area 215 on the back surface 210B of the pressure receiving member main body 210. The second fixing parts 132 are arranged at the lower end part of the front side surface of the case 120, spaced apart from each other left and right. The second fixing parts 132 are arranged below the corresponding first fixing parts 131 in the left - right direction. Specifically, one second fixing part 132 is arranged below the left first fixing part 131, and the other second fixing part 132 is arranged below the right first fixing part 131. The second fixing parts 132 are fixed to different second fixing areas 215 respectively. Specifically, one second fixing part 132 is fixed to the left second fixing area 215, and the other second fixing part 132 is fixed to the right second fixing area 215.

[0066] As shown in FIG. 5, each fixing portion 130 is fixed to the pressure receiving member 200 by a screw 190. Specifically, the radio wave sensor 100 is disposed on the rear side of the central portion 211 of the pressure receiving member main body 210, and the screw 190 is tightened from the front side through the through hole 216 of the pressure receiving member 200 to the fixing portion main body 130A of the fixing portion 130, thereby being fixed to the back surface 210B of the pressure receiving member 200. The fixing portion main body 130A may or may not have a screw groove formed on its inner peripheral surface.

[0067] As shown in FIG. 3, the radio wave sensor 100 is disposed below the pressure receiving member 200. Specifically, the radio wave sensor 100 is disposed below the central portion 211. More specifically, the radio wave sensor 100 is disposed at a position between the left and right second side portions 213 in the vertical direction. The lower portion of the pressure receiving member 200 is a portion where the amount of deformation of the pressure receiving member 200 is small when the pressure receiving member 200 receives a load greater than a predetermined value from the seated person and moves backward.

[0068] According to the present embodiment described above, the following effects can be achieved. As shown in FIG. 4, since the first fixing region 214 of the pressure receiving member 200 surrounded by the ribs 223, 224A, 232, 234 has high rigidity and is difficult to deform, by fixing the radio wave sensor 100 to this first fixing region 214, the mounting rigidity of the radio wave sensor 100 can be increased.

[0069] In addition, since the radio wave sensor 100 has a plurality of first fixing portions 131, a plurality of portions of the radio wave sensor 100 are fixed to the first fixing region 214 of the pressure receiving member 200, so that the mounting rigidity of the radio wave sensor 100 can be further increased.

[0070] In addition, since the pressure receiving member 200 has a plurality of first fixing regions 214, the area of each first fixing region 214 can be made smaller compared to the case where a plurality of locations of the radio wave sensor 100 are fixed to one surrounding region. Therefore, the rigidity of each first fixing region 214 can be made higher. Then, by fixing the first fixing portions 131 of the radio wave sensor 100 to the first fixing regions 214 with high rigidity respectively, the mounting rigidity of the radio wave sensor 100 can be further enhanced.

[0071] In addition, since the first fixing regions 214 are respectively provided on both the left and right sides of the center in the left - right direction of the pressure receiving member 200, the radio wave sensor 100 can be arranged so as to straddle the center in the left - right direction of the pressure receiving member 200. Thereby, it is possible to suppress the occurrence of weight bias in the pressure receiving member 200 to which the radio wave sensor 100 is attached.

[0072] In addition, since the radio wave sensor 100 is arranged below the pressure receiving member 200, in other words, the radio wave sensor 100 is not attached to the upper part of the pressure receiving member 200, the amount of deflection of the upper part of the pressure receiving member 200 can be ensured.

[0073] In addition, since the first fixing region 214 is provided between a pair of left - right extending portions 251 of the mounting wire 250, both the left and right sides of the first fixing region 214 are supported by the mounting wire 250. Therefore, the mounting rigidity of the radio wave sensor 100 can be further enhanced.

[0074] In addition, since the fixing portion 130 is fixed to the pressure receiving member 200 by the screw 190, the radio wave sensor 100 can be attached to the pressure receiving member 200 relatively easily.

[0075] As described above, the embodiments have been described. However, the present invention is not limited to the above - described embodiments and can be appropriately modified and implemented as exemplified below.

[0076] For example, in the above - described embodiment, the radio wave sensor 100 is arranged below the pressure receiving member 200, but the present invention is not limited to this, and it may be arranged at a position other than the lower part of the pressure receiving member.

[0077] In addition, in the above-described embodiment, the pressure receiving member 200 has a plurality of first fixing regions 214 (surrounding regions), and the first fixing portions 131 are fixed to different first fixing regions 214, respectively, but the present invention is not limited thereto. For example, a configuration in which a plurality of first fixing portions are fixed to the same surrounding region may be employed, and in this case, the pressure receiving member may have only one surrounding region.

[0078] In the above-described embodiment, the radio wave sensor 100 has four fixing portions 130, but the number of fixing portions is arbitrary. That is, the radio wave sensor may have at least one fixing portion, and the number of fixing portions is not limited to four, and may be three or less or five or more. The number of the first fixing portions fixed to the surrounding region of the pressure receiving member is also arbitrary. Note that the radio wave sensor may have a configuration in which all of the fixing portions are first fixing portions, or a configuration in which only one of the plurality of fixing portions is a first fixing portion. Further, depending on the number of the first fixing portions, two or more surrounding regions of the pressure receiving member may be provided on both the left and right sides of the center in the left-right direction of the pressure receiving member.

[0079] In the above-described embodiment, the radio wave sensor 100 is fixed to the central portion 211 of the pressure receiving member 200, but the present invention is not limited thereto. For example, the radio wave sensor 100 may be fixed to the first side portion 212 or the second side portion 213 of the pressure receiving member 200. When the radio wave sensor 100 is fixed to the first side portion 212, the radio wave sensor 100 may be arranged so as to straddle a plurality of first side portions 212 arranged vertically. When the radio wave sensor 100 is fixed to the first side portion 212, the radio wave sensor 100 may be fixed to one first side portion 212 or may be fixed to a plurality of first side portions 212.

[0080] Further, in the above-described embodiment, the fixing portion 130 was fixed to the pressure receiving member 200 by the screw 190, but the present invention is not limited to this. For example, the fixing portion may be a clip such as the mounting clip 260 of the above-described embodiment, and may be fixed to the pressure receiving member by engaging with a through hole formed in the pressure receiving member.

[0081] Further, the specific configuration of the pressure receiving member is not limited to the configuration of the above-described embodiment. For example, in the above-described embodiment, the horizontal ribs 223, 224A (first ribs) and the vertical ribs 232, 234 (second ribs) were orthogonal to each other, but the first rib and the second rib only need to intersect, and may have a configuration in which they are not orthogonal. Also, the arrangement and number of the ribs are arbitrary. Further, in the above-described embodiment, the pressure receiving member 200 has a central portion 211 and side portions 212, 213, but for example, the pressure receiving member may have a configuration without side portions. Further, in the above-described embodiment, the pressure receiving member 200 is integrally formed with the mounting wire 250, but for example, the pressure receiving member and the mounting wire may be separately formed, and when the pressure receiving member is attached to the seat back frame, the mounting wire may be attached to an extension portion of the pressure receiving member.

[0082] Further, in the above-described embodiment, the pressure receiving member 200 and the radio wave sensor 100 were provided on the seat back S2, but the present invention is not limited to this, and the pressure receiving member and the radio wave sensor may be provided on the seat cushion S1. When the pressure receiving member and the radio wave sensor are provided on the seat cushion S1, the upper side corresponds to the "seated person side" and the lower side corresponds to the "side opposite to the seated person side". Further, the pressure receiving member and the radio wave sensor may be provided on both the seat cushion S1 and the seat back S2, respectively.

[0083] Further, in the above-described embodiment, the vehicle seat is exemplified as a vehicle seat mounted on an automobile, but the present invention is not limited to this, and for example, the vehicle seat may be a seat mounted on a railway vehicle. Also, the vehicle seat may be a seat mounted on a vehicle other than a vehicle, such as a ship or an aircraft.

[0084] In addition, each element described in the above-described embodiments and modifications may be implemented in any combination.

Explanation of Reference Numerals

[0085] 100 Radio wave sensor 130 Fixed part 131 First fixed part 190 Screw 200 Pressure receiving member 210B Back surface 214 First fixed region 223 Third horizontal rib 224A Fourth horizontal rib 232 Second vertical rib 234 Fourth vertical rib 250 Mounting wire 251 Extension part S Vehicle seat S1 Seat cushion S2 Seat back

Claims

1. A vehicle seat comprising a seat cushion and a seat back, a plate-shaped pressure receiving member that receives the load from the seated person, a radio wave sensor that detects the reflected wave of the radio wave irradiated toward the seated person and acquires information about the seated person, the radio wave sensor being fixed to the pressure receiving member, the pressure receiving member having a plurality of first ribs protruding from the back surface, which is the surface on the side opposite to the seated person side, toward the side opposite to the seated person side, and a plurality of second ribs protruding from the back surface toward the side opposite to the seated person side, the plurality of second ribs intersecting the plurality of first ribs, the radio wave sensor having at least one fixing portion fixed to the pressure receiving member, the fixing portion including a first fixing portion fixed to an enclosed area surrounded by the plurality of first ribs and the plurality of second ribs on the back surface, which is a vehicle seat characterized in that.

2. The radio wave sensor has a sensor portion for acquiring information about the seated person, a case for housing the sensor portion, and a plurality of the first fixing portions, the plurality of the first fixing portions being provided to protrude from the surface on the seated person side of the case, the case facing the first rib and the second rib, the plurality of the first fixing portions each entering an enclosed area surrounded by the plurality of first ribs and the plurality of second ribs and being fixed to the back surface, which is the vehicle seat according to claim 1.

3. the pressure receiving member having a plurality of the enclosed areas, the first fixing portion being fixed to different enclosed areas, which is the vehicle seat according to claim 2.

4. the enclosed area being provided at least one each on both the left and right sides of the center in the left-right direction of the pressure receiving member, which is the vehicle seat according to claim 3.

5. the pressure receiving member and the radio wave sensor being provided on the seat back, which is the vehicle seat according to any one of claims 1 to 4.

6. the radio wave sensor being disposed at the lower part of the pressure receiving member, which is the vehicle seat according to claim 5.

7. including an attachment wire for attaching the pressure receiving member to the frame of the vehicle seat, the attachment wire being a pair of extending portions extending in a direction orthogonal to the left-right direction and having a pair of extending portions for supporting the pressure receiving member, The vehicle seat according to any one of claims 1 to 6, wherein the surrounding area is provided between the pair of extending portions in the left-right direction.

8. The vehicle seat according to any one of claims 1 to 7, wherein the fixing portion is fixed to the pressure receiving member by a screw.

9. The vehicle seat according to any one of claims 1 to 8, wherein the radio wave sensor is a sensor that detects at least one of the heartbeat and respiration of the seated person.

Images