Seat for a vehicle

Abstract

A vehicle seat capable of improving mounting rigidity of an electric wave sensor is provided. The vehicle seat includes a seat cushion, a seat back, a plate-shaped pressure receiving member (200) that receives load from a seated person, and an electric wave sensor (100) that detects a reflected wave of an electric wave radiated toward the seated person and acquires information related to the seated person. The electric wave sensor (100) is fixed to the pressure receiving member (200). The pressure receiving member (200) has a plurality of first ribs (223, 224A) that protrude toward a rear side from a rear surface (210B) that is a surface of the rear side, and a plurality of second ribs (232, 234) that protrude toward the rear side from the rear surface (210B) and cross the plurality of first ribs. The electric wave sensor (100) has a fixing portion (130) that is fixed to the pressure receiving member (200). The fixing portion (130) includes a first fixing portion (131) that is fixed to a surrounding region (first fixing region 214) surrounded by the plurality of first ribs and the plurality of second ribs in the rear surface (210B).

Description

TECHNICAL FIELD

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

[0002] In the past, a vehicle seat including a plate-shaped pressure receiving member that receives a load from a seated person is known. For example, in the vehicle seat disclosed in Patent Literature 1, the pressure receiving member is provided in the seat back and configured to be movable rearward in a state of receiving a load from a seated person. In addition, the vehicle seat disclosed in Patent Literature 2 includes, in addition to the pressure receiving member, a support member that supports the pressure receiving member and changes the shape of the pressure receiving member. The support member has a lower side lifting plate, an upper side lifting plate that moves up and down with respect to the lower side lifting plate, and an arch-shaped member that is capable of flexibly deforming and whose upper end is fixed to the upper side lifting plate and whose lower end is fixed to the lower side lifting plate, and is configured such that, when the upper side lifting plate moves in a direction close to the lower side lifting plate, the arch-shaped member is flexed to the front side to press the pressure receiving member to the front side.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2019-182274

[0006] Patent Literature 2: Japanese Patent No. 6572973 SUMMARY

[0007] Incidentally, in recent years, in a vehicle seat, an electric wave sensor is sometimes provided in order to detect a heartbeat or respiration or the like of a seated person. In a case where such an electric wave sensor is installed in a movable pressure receiving member as described above, it is desirable that the installation rigidity of the electric wave sensor be high. In addition, in a case where an electric wave sensor is provided in a vehicle seat including a pressure receiving member and a support member as described above, it is desirable that the electric wave sensor be provided without interfering with the operation of the support member and the pressure receiving member.

[0008] In view of the background as described above, a vehicle seat including a seat cushion and a seat back is proposed. In one aspect, the vehicle seat includes a plate-shaped pressure receiving member that receives a load from an occupant, and a radio wave sensor that detects a reflected wave of a radio wave radiated toward the occupant and acquires information related to the occupant, and the radio wave sensor is fixed to the pressure receiving member, the pressure receiving member has a plurality of first ribs that protrude from a back surface, which is a surface on an opposite side to the occupant side, toward the opposite side to the occupant side, and a plurality of second ribs that protrude from the back surface toward the opposite side to the occupant side, and the plurality of second ribs cross the plurality of first ribs, and the radio wave sensor has at least one fixing portion fixed to the pressure receiving member, the fixing portion including a first fixing portion fixed to a surrounding region surrounded by the plurality of first ribs and the plurality of second ribs in the back surface.

[0009] According to this structure, the surrounding region surrounded by the ribs of the pressure receiving member is a portion that is high in rigidity and less likely to deform, and thus by fixing the radio wave sensor to the surrounding region, the mounting rigidity of the radio wave sensor can be improved.

[0010] In the vehicle seat described above, the radio wave sensor can have a plurality of the first fixing portions.

[0011] Accordingly, a plurality of portions of the radio wave sensor are fixed to the surrounding region of the pressure receiving member, and thus the mounting rigidity of the radio wave sensor can be further improved.

[0012] In the vehicle seat described above, the pressure receiving member can have a plurality of the surrounding regions, and the first fixing portions can be fixed to different surrounding regions, respectively.

[0013] Accordingly, the area of each surrounding region can be reduced, and thus the rigidity of each surrounding region can be further improved. Also, by fixing the first fixing portions of the radio wave sensor to each surrounding region that is high in rigidity, respectively, the mounting rigidity of the radio wave sensor can be further improved.

[0014] In the vehicle seat described above, the surrounding region can be provided at least one on each of left and right sides of a center in a left-right direction of the pressure receiving member.

[0015] Accordingly, the radio wave sensor can be arranged so as to straddle the center in the left-right direction of the pressure receiving member, and thus a deviation in weight of the pressure receiving member on which the radio wave sensor is mounted can be suppressed.

[0016] In the vehicle seat described above, the pressure receiving member and the radio wave sensor can be provided to the seat back.

[0017] In the vehicle seat described above, the electric wave sensor can be disposed at a lower portion of the pressure receiving member.

[0018] Accordingly, the amount of deflection of the upper portion of the pressure receiving member can be ensured.

[0019] The vehicle seat described above can include a mounting wire for mounting the pressure receiving member to a frame of the vehicle seat, the mounting wire having a pair of extensions extending in a direction orthogonal to the left-right direction and supporting the pressure receiving member, the surrounding area being disposed between the pair of extensions in the left-right direction.

[0020] Accordingly, the left and right sides of the surrounding area are supported by the mounting wire, and thus the mounting rigidity of the electric wave sensor can be further improved.

[0021] In the vehicle seat described above, the fixing portion can be fixed to the pressure receiving member by a screw.

[0022] Accordingly, the electric wave sensor can be mounted to the pressure receiving member relatively easily.

[0023] In the vehicle seat described above, the electric wave sensor can be a sensor that detects at least one of a heartbeat and respiration of an occupant.

[0024] Another aspect of a vehicle seat including a seat cushion and a seat back is disclosed. The vehicle seat includes a plate-shaped pressure receiving member that receives a load from an occupant, a support member that supports the pressure receiving member from a side opposite to the occupant side and changes the shape of the pressure receiving member, and an electric wave sensor that detects a reflected wave of an electric wave radiated toward the occupant and acquires information related to the occupant, the support member having a first plate-shaped member, a second plate-shaped member that moves in a direction approaching or separating from the first plate-shaped member in an orthogonal direction orthogonal to the left-right direction, and an arc-shaped member that is elastically deformable, one end of which is fixed to the first plate-shaped member and the other end of which is fixed to the second plate-shaped member, and that is elastically deformed toward the occupant side when the second plate-shaped member moves in a direction approaching the first plate-shaped member, and presses the pressure receiving member toward the occupant side, the pressure receiving member having a central portion located in the center in the left-right direction and pressed by the arc-shaped member, and left and right side portions disposed on the left and right sides of the central portion, the electric wave sensor being mounted to the side portions.

[0025] With this structure, the electric wave sensor can be provided without interfering with the operation of the support member and the pressure receiving member.

[0026] In the vehicle seat described above, the electric wave sensor can be installed to a surface of the side portion on a side opposite to the side of the occupant.

[0027] Accordingly, it is possible to suppress the feeling of contact from the electric wave sensor when the occupant is seated on the vehicle seat.

[0028] In the vehicle seat described above, the side portion can extend from both ends of the central portion in the left-right direction in a manner to be on the side of the occupant as it goes toward the outside in the left-right direction.

[0029] Accordingly, it is possible to easily arrange the electric wave sensor toward the occupant.

[0030] In the vehicle seat described above, the side portion can include a first side portion having a plate shape with a length in the orthogonal direction smaller than a length in the left-right direction, and a second side portion having a plurality of plate shape portions with a length in the orthogonal direction smaller than a length in the left-right direction and arranged at intervals in the orthogonal direction, and a connecting portion connecting top ends of the plurality of plate shape portions, the electric wave sensor being installed to the second side portion.

[0031] Accordingly, it is possible to secure the amount of deflection of the side portion of the pressure receiving member by the first side portion, and to improve the rigidity of the second side portion in which the electric wave sensor is installed, and thus to improve the installation rigidity of the electric wave sensor. That is, it is possible to achieve both securing the amount of deflection of the side portion of the pressure receiving member and improving the installation rigidity of the electric wave sensor.

[0032] In the vehicle seat described above, the pressure receiving member, the support member, and the electric wave sensor can be provided to the seat back portion, and the second side portion can be arranged at a lower portion of the pressure receiving member.

[0033] Accordingly, it is possible to suppress the feeling of contact from the occupant from the second side portion in which the electric wave sensor is installed, along with the operation of the support member and the pressure receiving member.

[0034] In the vehicle seat described above, the side portion can have a plurality of plate shape portions with a length in the orthogonal direction smaller than a length in the left-right direction and arranged at intervals in the orthogonal direction, and the electric wave sensor can be arranged to span the plurality of plate shape portions in the orthogonal direction.

[0035] Accordingly, it is possible to irradiate the electric wave from between the plate shape portions, and to detect the reflected wave of the electric wave by the plate shape portions, and thus the electric wave sensor can irradiate and detect the electric wave well.

[0036] Further disclosed is another form of a vehicle seat including a seat cushion and a seat back. The vehicle seat includes a plate-shaped pressure receiving member that receives a load from a seated person, a support member that supports the pressure receiving member from a side opposite to the seated person and changes a shape of the pressure receiving member, and a radio wave sensor that detects a reflected wave of a radio wave radiated toward the seated person and acquires information related to the seated person. The support member includes a first plate-shaped member, a second plate-shaped member that moves in a direction of approaching or separating from the first plate-shaped member in an orthogonal direction orthogonal to left and right directions, and an arc-shaped member that is elastically deformable, one end of which is fixed to the first plate-shaped member and the other end of which is fixed to the second plate-shaped member, and that is elastically deformed toward the seated person when the second plate-shaped member moves in the direction of approaching the first plate-shaped member, and presses the pressure receiving member toward the seated person. The radio wave sensor is attached to a surface of the first plate-shaped member or the second plate-shaped member on a side opposite to the seated person.

[0037] With this configuration, the radio wave sensor can be provided without interfering with the operation of the support member and the pressure receiving member.

[0038] The vehicle seat described above can be configured to include a sensor orientation changing mechanism that changes an orientation of the radio wave sensor according to a position of the radio wave sensor in the orthogonal direction.

[0039] Accordingly, the radio wave sensor can be oriented in a suitable direction regardless of the position of the radio wave sensor in the orthogonal direction, and the detection accuracy of the radio wave sensor can be improved.

[0040] In the vehicle seat described above, the pressure receiving member, the support member, and the radio wave sensor can be provided in the seat back.

[0041] In the vehicle seat described above, the radio wave sensor can be a sensor that detects at least one of a heartbeat and respiration of the seated person. BRIEF DESCRIPTION OF DRAWINGS

[0042] [ Figure 1 ] is a perspective view of a vehicle seat according to each embodiment.

[0043] [ Figure 2 ] is a perspective view of a seat frame and a pressure receiving member of a vehicle seat according to a first embodiment.

[0044] [ Figure 3 ] is a perspective view of the pressure receiving member viewed from the rear side.

[0045] [ Figure 4 ] is a perspective view of a lower portion of the pressure receiving member and a radio wave sensor.

[0046] [ Figure 5 [ ] is a cross-sectional view showing the state of the electromagnetic wave sensor fixed to the pressure member.

[0047] [ Figure 6 [This is a perspective view of the seat frame and lumbar support device of the vehicle seat according to the second embodiment.]

[0048] [ Figure 7 This is a 3D view showing the lumbar support device removed from the seat frame.

[0049] [ Figure 8 [This is a rear view of the lumbar support device.]

[0050] [ Figure 9 [ ] is a diagram illustrating the movement of the support components. (a) shows the state of the upper and lower lifting plates rising, and (b) shows the state of the upper lifting plate falling.

[0051] [ Figure 10 [This is a three-dimensional view of the supporting structure with the upper lifting plate descending and the arched component deflecting forward.]

[0052] [ Figure 11 [ ] is a diagram showing the pressure-bearing components and the electromagnetic wave sensor.

[0053] [ Figure 12 [This is a perspective view of the lower part of the seat back frame and lumbar support device of the vehicle seat according to the third embodiment, viewed from the rear.]

[0054] [ Figure 13 (a) is a block diagram of the sensor orientation changing mechanism, (b) represents the lower lifting plate in the downward state, and (c) represents the lower lifting plate in the upward state.

[0055] [ Figure 14 [] is a diagram showing a variation of the third embodiment. Detailed Implementation

[0056] Next, the first embodiment will be described in detail with reference to the accompanying drawings. Furthermore, in this specification, front and back, left and right, and up and down are based on the front and back, left and right, and up and down views as observed from the person sitting in the seat (the seated person). In addition, in this embodiment, the front side corresponds to the "seat-holder side", the back side corresponds to the "side opposite to the seat-holder side", and the up and down direction corresponds to the "orthogonal direction orthogonal to the left and right direction".

[0057] like Figure 1 As shown, a vehicle seat S, as an example of a vehicle seat, is a seat mounted in a car or other vehicle. This is achieved by a seat frame F (refer to...) serving as the frame of the vehicle seat S. Figure 2) overlying a cushion including urethane foam or the like and a skin including cloth or leather or the like.

[0058] In detail, the vehicle seat S includes a seat cushion S1, a seat back S2, and a headrest S3. The seat cushion S1 is configured by overlying a seat cushion pad P1 and a seat cushion skin U1 over a seat cushion frame F1 (refer to Figure 2 ). In addition, the seat back S2 is configured by overlying a seat back pad P2 and a seat back skin U2 over a seat back frame F2 (refer to Figure 2 ).

[0059] As shown in Figure 2 , the seat frame F includes the seat cushion frame F1 and the seat back frame F2, and the seat back frame F2 is connected to a rear end portion of the seat cushion frame F1 via a reclining mechanism.

[0060] The seat back frame F2 includes a pair of sheet metal frames 12 arranged separately left and right, and a pipe frame 13 formed by bending a pipe material into a U shape, which is connected to upper ends of the pair of sheet metal frames 12 respectively.

[0061] The pipe frame 13 has a pair of upper side frames 13A extending straight upward from the sheet metal frames 12 and slightly inclined inward left and right. The sheet metal frames 12 and the upper side frames 13A left and right are a pair of side frames 11 arranged separately left and right. In addition, the pipe frame 13 has an upper frame 13B linking upper end portions of the pair of upper side frames 13A, that is, upper end portions of the side frames 11 to each other.

[0062] In addition, the seat back frame F2 has a lower frame 16 linking lower portions of the side frames 11, specifically, lower portions of the sheet metal frames 12 to each other, and a cross-link frame 15 linking upper portions of the side frames 11, specifically, the upper side frames 13A left and right to each other at a position lower than the upper frame 13B.

[0063] The lower frame 16 and the cross-link frame 15 are members including sheet metal. The lower frame 16 extends long in the left-right direction, and left and right end portions are fixed to portions of the sheet metal frames 12 extending inward left and right by welding. The cross-link frame 15 extends long in the left-right direction, and left and right end portions are fixed to the upper side frames 13A by welding.

[0064] The vehicle seat S further includes a pressure receiving member 200, and a mounting wire 250 and a plurality of mounting clamps 260 for mounting the pressure receiving member 200 to the seat back frame F2 (refer to Figure 3 ).

[0065] The pressure receiving member 200 is mounted to the seat back frame F2 via the seat back pad P2 (refer to Figure 1A plate-shaped member that bears the load from the seated person is provided on the seat back S2. The pressure-bearing member 200 contains resin or the like. The pressure-bearing member 200 is configured to be approximately symmetrical about the center in the left-right direction. The pressure-bearing member 200 has a pressure-bearing member body 210, which has a central portion 211 located in the center in the left-right direction, and a first side portion 212 and a second side portion 213 disposed on the left and right sides of the central portion 211.

[0066] The central section 211 is the part that supports the back and waist of the seated person from directly behind.

[0067] The first side portion 212 and the second side portion 213 extend diagonally forward and to the left and right sides from the left and right ends of the central portion 211, in a manner that they are located on the front side as they tend to move outward in the left and right direction.

[0068] The first side portion 212 is the left and right side portion that supports the back of the seated person from the rear. The first side portion 212 has a narrow plate shape with a length in the vertical direction that is smaller than its length in the horizontal direction, and five of them are provided on each side of the central portion 211 and arranged in the vertical direction.

[0069] The second side portion 213 is located below the first side portion 212 and is positioned on the left and right sides that support the waist of the seated person from the rear. The second side portion 213 has a plate-shaped shape in which the length in the vertical direction is greater than the length in the horizontal direction, and extends from the lower part of the left and right ends of the central portion 211 to the left and right sides in a diagonal forward direction.

[0070] The first side portion 212 and the second side portion 213 are formed to be easily and moderately flexible, so as to flexibly accommodate the side of the seated person.

[0071] like Figure 3 As shown, the compression member 200 also has a plurality of transverse ribs 220 and a plurality of longitudinal ribs 230. The transverse ribs 220 and longitudinal ribs 230 protrude rearward from the rear surface 210B of the compression member body 210. The transverse ribs 220 extend in the left-right direction, and the longitudinal ribs 230 extend in a direction orthogonal to the left-right direction, specifically in the up-down direction. The longitudinal ribs 230 are formed to intersect with the plurality of transverse ribs 220.

[0072] The multiple horizontal ribs 220 extending to the 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.

[0073] The first transverse rib 221 is a rib formed at the upper end of the central portion 211. The first transverse rib 221 is located higher in the vertical direction than the uppermost first side portion 212.

[0074] The second lateral rib 222 is a rib formed across the rear side of one of the first side portions 212, the rear side of the central portion 211, and the rear side of the other of the first side portions 212. The second lateral rib 222 is formed in five corresponding to five pairs of the first side portions 212.

[0075] The third lateral rib 223 and the fourth lateral rib 224 are ribs formed across the rear side of one of the second side portions 213, the rear side of the central portion 211, and the rear side of the other of the second side portions 213. The third lateral rib 223 is located at substantially the same position as the upper end portion of the second side portion 213 in the up-down direction. The fourth lateral rib 224 is located at substantially the same position as the vicinity of the central portion of the second side portion 213 in the up-down direction. The fourth lateral rib 224 has a fourth lateral rib 224A on the upper side and a fourth lateral rib 224B on the lower side.

[0076] The fifth lateral rib 225 is a rib formed at the lower end portion of the central portion 211. The fifth lateral rib 225 is located at a position lower than the fourth lateral rib 224 (224B) in the up-down direction.

[0077] The plurality of longitudinal ribs 230 extending in the up-down direction include a first longitudinal rib 231, a second longitudinal rib 232, a third longitudinal rib 233, a fourth longitudinal rib 234, and a fifth longitudinal rib 235.

[0078] The first longitudinal rib 231 is a rib formed at both end portions in the left-right direction of the rear side of the central portion 211. The upper end of the first longitudinal rib 231 is connected to the first lateral rib 221, and the lower end is connected to the fourth lateral rib 224B.

[0079] The second longitudinal rib 232 is a rib formed inward in the left-right direction of the first longitudinal rib 231. Two are aligned in the left-right direction. The upper end of the second longitudinal rib 232 extends to the upper end portion of the central portion 211, and the lower end is connected to the fourth lateral rib 224B. The extension 251 of the mounting wire 250 described later is located between the first longitudinal rib 231 and the second longitudinal rib 232 in the left-right direction. In other words, the extension 251 is disposed between the first longitudinal rib 231 and the second longitudinal rib 232 in the left-right direction.

[0080] The third longitudinal rib 233 is a rib formed inward in the left-right direction of the second longitudinal rib 232 and the upper portion of the central portion 211. Four are aligned in the left-right direction. The upper end of the third longitudinal rib 233 extends to the upper end portion of the central portion 211, and the lower end is connected to the second lateral rib 222 located at the second position from the upper side.

[0081] The fourth longitudinal rib 234 is a rib formed at the lower portion of the inner side and the central portion 211 in the left-right direction of the second longitudinal rib 232. The fourth longitudinal rib 234 is arranged in two in the left-right direction. The upper end of the fourth longitudinal rib 234 is connected to the third transverse rib 223, and the lower end extends to the lower end portion of the central portion 211.

[0082] The fifth longitudinal rib 235 is a rib formed at the end portion of the left and right outer sides of the surface of the rear side of the second side portion 213. The upper end of the fifth longitudinal rib 235 is connected to the end portion of the left and right outer sides of the third transverse rib 223. In addition, the end portion of the left and right outer sides of the fourth transverse rib 224 is connected to the fifth longitudinal rib 235.

[0083] As shown in Figure 4 The pressure receiving member main body 210 (the central portion 211) has a first fixing region 214 and a second fixing region 215 in which the later-described electric wave sensor 100 is fixed. The pressure receiving member 200 has a plurality of, specifically two, first fixing regions 214 and second fixing regions 215, respectively.

[0084] The first fixing region 214 is a region surrounded by the third transverse rib 223 and the fourth transverse rib 224A, and the second longitudinal rib 232 and the fourth longitudinal rib 234. The first fixing region 214 is located at substantially the same position as the upper end portion of the second side portion 213 in the up-down direction. The two first fixing regions 214 are arranged separately to the left and right. One is provided on each of the left and right sides of the center in the left-right direction of the pressure receiving member 200. In addition, the first fixing region 214 is provided between the left and right pair of extension portions 251 of the mounting wire 250 in the left-right direction.

[0085] Here, in the present embodiment, the third transverse rib 223 and the fourth transverse rib 224A correspond to "a plurality of first ribs", the second longitudinal rib 232 and the fourth longitudinal rib 234 correspond to "a plurality of second ribs", and the first fixing region 214 corresponds to "a surrounding region".

[0086] The second fixing region 215 is an inner side region of a substantially U-shaped portion formed by the fourth transverse rib 224B and the fifth transverse rib 225, and the fourth longitudinal rib 234. The second fixing region 215 is located at substantially the same position as the lower end portion of the second side portion 213 in the up-down direction. The two second fixing regions 215 are arranged separately to the left and right. The second fixing region 215 is arranged below the corresponding first fixing region 214 in the left-right direction. In detail, 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.

[0087] A screw 190 (refer to FIG. 1) is screwed into each of the first fixing region 214 and the second fixing region 215. Figure 5) Through hole 216.

[0088] return Figure 3 The mounting wire 250 is a component formed by bending a metal-containing wire into a generally U-shape. It has a pair of left and right extensions 251 extending in the vertical direction, a pair of left and right upper mounting portions 252 extending upward from the upper end of each extension 251, and a lower mounting portion 253 connecting the lower portions of the left and right extensions 251 to each other. The pair of left and right extensions 251 are the parts that support the pressure-bearing member 200. The mounting wire 250 becomes integral with the pressure-bearing member 200 by embedding and forming the pair of left and right extensions 251 into the pressure-bearing member 200. A plurality of mounting clamps 260 are mounted on the lower mounting portion 253.

[0089] The pressure-bearing member 200 is installed on the seat back frame F2 by inserting the upper mounting portion 252 of the mounting thread 250 into a through hole (not shown) formed in the cross-linking frame 15, and engaging the mounting clamp 260 with a through hole (not shown) formed in the lower frame 16. The pressure-bearing member 200 is configured to move rearward under load from the occupant. The vehicle seat S moves rearward when another vehicle rear-ends the vehicle equipped with the vehicle seat S, when the rear of a reversing vehicle collides with another vehicle or structure, or when the pressure-bearing member 200 bears a rearward load greater than a specified amount from the occupant, thereby reducing the impact on the occupant's neck.

[0090] like Figure 3 and Figure 4 As shown, the vehicle seat S also includes an electromagnetic wave sensor 100. The electromagnetic wave sensor 100 is a sensor that detects reflected waves of electromagnetic waves irradiated towards the seated person and acquires information related to the seated person. This information includes, for example, information indicating the seated person's heart rate, pulse rate, pulse strength, respiratory rate, and respiratory rate. In other words, the electromagnetic wave sensor 100 is a sensor that detects at least one of the seated person's heartbeat and respiration.

[0091] like Figure 5 As shown, the radio wave sensor 100 has a sensor section 110 for acquiring information related to the seated person, a housing 120 for housing the sensor section 110, and a plurality of fixing sections 130.

[0092] The sensor unit 110 includes an irradiation unit 111 that irradiates radio waves onto the seated person, and a detection unit 112 that detects the reflected waves of radio waves reflected from the skin surface of the seated person. As the radio wave sensor 100, the sensor unit 110 can be, for example, a microwave Doppler sensor.

[0093] The electric wave sensor 100 is provided to the seat back S2 as with the pressure receiving member 200. In detail, the electric wave sensor 100 is fixed to the pressure receiving member 200. The fixing portion 130 is a portion fixed to the pressure receiving member 200.

[0094] As shown in FIG. 1, the fixing portion 130 is provided with four, one being arranged at each of the four corners of the face of the front side of the case 120. The fixing portion 130 has a substantially cylindrical fixing portion main body 130A provided in a manner projecting from the case 120, and a plurality of reinforcing ribs 130B projecting from the outer peripheral surface of the fixing portion main body 130A. The reinforcing ribs 130B are provided with four, being arranged at equal intervals in the circumferential direction of the fixing portion main body 130A. The rear ends of the reinforcing ribs 130B are connected to the case 120. Figure 4

[0095] The fixing portion 130 includes a first fixing portion 131 and a second fixing portion 132. The electric wave sensor 100 has a plurality of the first fixing portion 131 and the second fixing portion 132. In detail, the electric wave sensor 100 has two first fixing portions 131 and two second fixing portions 132.

[0096] The first fixing portion 131 is a fixing portion fixed to the first fixing region 214 in the back face 210B of the pressure receiving member main body 210. The first fixing portion 131 is arranged at the upper end portion of the face of the front side of the case 120 separately left and right. The first fixing portion 131 is fixed to different first fixing regions 214, respectively. In detail, one of the first fixing portions 131 is fixed to the left first fixing region 214, and the other first fixing portion 131 is fixed to the right first fixing region 214.

[0097] The second fixing portion 132 is a fixing portion fixed to the second fixing region 215 in the back face 210B of the pressure receiving member main body 210. The second fixing portion 132 is arranged at the lower end portion of the face of the front side of the case 120 separately left and right. The second fixing portion 132 is arranged below the corresponding first fixing portion 131 in the left-right direction. In detail, one of the second fixing portions 132 is arranged below the left first fixing portion 131, and the other second fixing portion 132 is arranged below the right first fixing portion 131. The second fixing portion 132 is fixed to different second fixing regions 215, respectively. In detail, one of the second fixing portions 132 is fixed to the left second fixing region 215, and the other second fixing portion 132 is fixed to the right second fixing region 215.

[0098] As shown in FIG. 1, the fixing portion 130 is provided with four, one being arranged at each of the four corners of the face of the front side of the case 120. The fixing portion 130 has a substantially cylindrical fixing portion main body 130A provided in a manner projecting from the case 120, and a plurality of reinforcing ribs 130B projecting from the outer peripheral surface of the fixing portion main body 130A. The reinforcing ribs 130B are provided with four, being arranged at equal intervals in the circumferential direction of the fixing portion main body 130A. The rear ends of the reinforcing ribs 130B are connected to the case 120. Figure 5 ​As shown, each fixing part 130 is fixed to the pressure-bearing member 200 by screws 190. Specifically, the electromagnetic wave sensor 100 is disposed on the rear side of the central part 211 of the pressure-bearing member body 210, and is fixed to the back side 210B of the pressure-bearing member 200 by screws 190 being fastened from the front through the through hole 216 of the pressure-bearing member 200 to the fixing part body 130A of the fixing part 130. The fixing part body 130A may or may not have a screw groove formed on its inner circumferential surface.

[0099] like Figure 3 As shown, the electromagnetic wave sensor 100 is disposed at the lower part of the pressure-bearing member 200. More specifically, the electromagnetic wave sensor 100 is disposed at the lower part of the central portion 211. More specifically, the electromagnetic wave sensor 100 is disposed vertically between the left and right second side portions 213. The lower part of the pressure-bearing member 200 is the portion where the deformation of the pressure-bearing member 200 is small when it moves rearward under a rearward load exceeding a specified amount from the seated person.

[0100] The above-described implementation method achieves the effects described below.

[0101] like Figure 4 As shown, the first fixed area 214 of the pressure member 200, which is surrounded by ribs 223, rib 224A, rib 232, and rib 234, is a part with high rigidity and is not easily deformed. Therefore, by fixing the radio wave sensor 100 to the first fixed area 214, the installation rigidity of the radio wave sensor 100 can be improved.

[0102] In addition, since the radio wave sensor 100 has a plurality of first fixing parts 131, and multiple parts of the radio wave sensor 100 are fixed to the first fixing area 214 of the pressure member 200, the mounting rigidity of the radio wave sensor 100 can be further improved.

[0103] Furthermore, by having multiple first fixing regions 214 in the pressure-bearing member 200, multiple parts of the radio wave sensor 100 are fixed to a surrounding area. Compared to this, the area of ​​each first fixing region 214 can be reduced, thus further improving the rigidity of each first fixing region 214. Moreover, by fixing the first fixing part 131 of the radio wave sensor 100 to each of the highly rigid first fixing regions 214, the mounting rigidity of the radio wave sensor 100 can be further improved.

[0104] Furthermore, since the first fixed region 214 is respectively provided on the left and right sides of the center in the left-right direction of the pressure member 200, the electromagnetic wave sensor 100 can be configured to span the center in the left-right direction of the pressure member 200. As a result, weight deviation of the pressure member 200 on which the electromagnetic wave sensor 100 is installed can be suppressed.

[0105] In addition, the electric wave sensor 100 is arranged at the lower portion of the pressure receiving member 200, in other words, the electric wave sensor 100 is not installed at the upper portion of the pressure receiving member 200, and thus the amount of deflection of the upper portion of the pressure receiving member 200 can be ensured.

[0106] In addition, by providing the first fixing region 214 between the pair of left and right extension portions 251 of the mounting wire 250, the left and right sides of the first fixing region 214 are supported by the mounting wire 250, and thus the mounting rigidity of the electric wave sensor 100 can be further improved.

[0107] In addition, the fixing portion 130 is fixed to the pressure receiving member 200 by the screw 190, and thus the electric wave sensor 100 can be mounted to the pressure receiving member 200 relatively easily.

[0108] The first embodiment has been described above, but the vehicle seat according to the present disclosure is not limited to the embodiment and can be appropriately modified and implemented as exemplified below.

[0109] For example, in the embodiment, the electric wave sensor 100 is arranged at the lower portion of the pressure receiving member 200, but is not limited thereto and can be arranged at a position other than the lower portion of the pressure receiving member.

[0110] In addition, in the 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, but is not limited thereto. For example, a structure in which a plurality of first fixing portions are fixed to the same surrounding region can be provided, and in this case, a structure in which the pressure receiving member has only one surrounding region can be provided.

[0111] In addition, in the embodiment, the electric wave sensor 100 has four fixing portions 130, but the number of fixing portions is arbitrary. That is, the electric wave sensor can be a structure having at least one fixing portion, and the number of fixing portions is not limited to four and can be three or less or five or more. The number of first fixing portions fixed to the surrounding region of the pressure receiving member is also arbitrary. Further, the electric wave sensor can be a structure in which all of the fixing portions are first fixing portions or a structure in which only one of a plurality of fixing portions is a first fixing portion. In addition, depending on the number of first fixing portions, two or more first fixing portions can be provided on the left and right sides of the center in the left and right directions of the pressure receiving member.

[0112] In addition, in the embodiment, the electric wave sensor 100 is a structure fixed to the central portion 211 of the pressure receiving member 200, but is not limited thereto, and for example, the electric wave sensor 100 can be a structure fixed to the first side portion 212 or the second side portion 213 of the pressure receiving member 200. Further, in the case where the electric wave sensor 100 is fixed to the first side portion 212, the electric wave sensor 100 can be arranged so as to span a plurality of first side portions 212 arranged in the up-down direction. In addition, in the case where the electric wave sensor 100 is fixed to the first side portion 212, the electric wave sensor 100 can be a structure fixed to one first side portion 212, or can be a structure fixed to a plurality of first side portions 212. In addition, by adopting a structure in which the electric wave sensor 100 is fixed to the side portion, in a form in which a support member that supports the pressure receiving member from the rear side and changes the shape of the pressure receiving member (refer to the second embodiment to be described later), the electric wave sensor can also be fixed securely.

[0113] In addition, in the embodiment, the fixing portion 130 is a structure fixed to the pressure receiving member 200 by the screw 190, but is not limited thereto. For example, the fixing portion can be a jig such as the mounting jig 260 of the embodiment, or can be a structure fixed to the pressure receiving member by being engaged with a through-hole formed in the pressure receiving member.

[0114] In addition, the specific structure of the pressure receiving member is not limited to the structure of the embodiment. For example, in the embodiment, the horizontal rib 223, the horizontal rib 224A (first rib), and the vertical rib 232, the vertical rib 234 (second rib) are orthogonal, but as long as the first rib and the second rib intersect, the structure can also be one in which they are not orthogonal. In addition, the arrangement or the number of the ribs, and the like are arbitrary. In addition, in the embodiment, the pressure receiving member 200 is a structure having the central portion 211 and the side portions 212, 213, but for example, the pressure receiving member can also be a structure that does not include the side portions. In addition, in the embodiment, the pressure receiving member 200 is formed integrally with the mounting wire 250, but for example, the pressure receiving member and the mounting wire can be formed separately, or can be a structure in which the mounting wire is attached to an extension portion of the pressure receiving member when the pressure receiving member is attached to the seat back frame.

[0115] In addition, in the embodiment, the pressure receiving member 200 and the electric wave sensor 100 are provided to the seat back S2, but the pressure receiving member and the electric wave sensor can also be provided to the seat cushion S1. Further, in the case where the pressure receiving member and the electric wave sensor are provided to the seat cushion S1, the upper side corresponds to the "occupant side", and the lower side corresponds to the "side opposite to the occupant side". In addition, the pressure receiving member and the electric wave sensor can also be provided to both the seat cushion S1 and the seat back S2, respectively.

[0116] Next, the first embodiment will be described mainly with reference to Figures 6-11The second embodiment will be described in detail. Also, hereinafter, for aspects common to the first embodiment, such as denoted with the same symbols in the drawings and the like, the description will be omitted as appropriate, and aspects different from the first embodiment will be described in detail. The vehicle seat S as an example of the seat for a vehicle of the second embodiment mainly differs from the first embodiment in that it has a waist support device including a support member that supports a pressure receiving member from a side opposite to the side of the occupant, and changes the shape of the pressure receiving member.

[0117] As shown in FIG. 1, the seat frame F includes a seat cushion frame Fl and a seat back frame F2 connected with the rear end portion of the seat cushion frame Fl via a reclining mechanism, like the first embodiment. Figure 6

[0118] The seat cushion frame Fl includes a pair of side frames 21 disposed separately left and right, a base frame 22 linking the front portions of the side frames 21 to each other, and a rear frame 24 linking the rear portions of the side frames 21 to each other.

[0119] The side frames 21 and the base frame 22 are members including sheet metal, and the rear frame 24 is a member including a pipe material.

[0120] The seat cushion frame Fl supports a mat member 25 that receives a load from the occupant. The mat member 25 has a plurality of wires extending in the front-rear direction while alternately bending left and right, and a plurality of resin portions integrally formed with the wires, and is disposed in a state of being placed on the base frame 22 and the rear frame 24.

[0121] As shown in FIG. 1, the seat back frame F2 includes a pair of sheet metal frames 12 disposed separately left and right, and a pipe frame 13 formed by bending a pipe material into a U shape, connected with the upper end of each of the pair of sheet metal frames 12. Figure 7 The pipe frame 13 has a pair of upper side frames 13A extending straight upward from the sheet metal frames 12 and slightly inclined inward left and right. The sheet metal frames 12 and the upper side frames 13A left and right are a pair of side frames 11 disposed separately left and right. In addition, the pipe frame 13 has an upper frame 13B linking the upper end portions of the pair of upper side frames 13A, that is, the upper end portions of the side frames 11 to each other.

[0122] In addition, the seat back frame F2 has a lower frame 14 linking the lower portions of the side frames 11, specifically, the lower portions of the sheet metal frames 12 to each other, and a cross-link frame 15 linking the upper portions of the side frames 11, specifically, the pair of upper side frames 13A to each other at a position lower than the upper frame 13B.

[0123]

[0124] ​​The lower frame 14 is a member including a sheet metal having a cross-sectional shape in which the upper edge and the lower edge slightly extend forward. The lower frame 14 extends long in the left-right direction, and the left and right end portions are fixed to the portions extending inward in the left-right direction of the sheet metal frame 12 by welding. Two mounting holes 14A are formed in the central portion of the lower frame 14 (lower portion of the seat back frame F2) in a slightly separated configuration in the left-right direction. The mounting holes 14A penetrate the lower frame 14 in the front-rear direction in the normal posture in which the seat back frame F2 is not inclined. The mounting holes 14A are portions through which a screw (the same component as the screw 91 described below in the third embodiment) for fixing the lower side locking portion 60 of the lumbar support device LS described below is inserted. Figure 12

[0125] The cross-link frame 15 has a lower flange 15A extending forward in the lower edge. A support hole 15B penetrating in the up-down direction is formed in the lower flange 15A. One is formed in each of the left and right end portions of the lower flange 15A.

[0126] The seat back frame F2 supports the lumbar support device LS. The lumbar support device LS is a device for receiving a force with which a seated person leans against the seat back S2 and transmitting it to the seat back frame F2, while changing the shape of a portion that comes into contact with the lumbar portion of the seated person, and changing the support state of the lumbar portion according to the preference of the seated person.

[0127] The lumbar support device LS includes a pressure receiving member 40 that receives a load from the back of the seated person via the seat back cushion P2 (see Figure 1 ), a support member 50 that supports the pressure receiving member 40 from the rear side (back side) and changes the shape of the pressure receiving member 40, and a lower side locking portion 60 for fixing the lower portion of the support member 50 (lumbar support device LS) to the lower frame 14.

[0128] The pressure receiving member 40 is a plate-shaped member including resin or the like, and has a central portion 41 located in the center in the left-right direction, and a pair of side portions 42 located on the left and right sides of the central portion 41 and extending further forward than the central portion 41.

[0129] The central portion 41 is located directly behind the back of the seated person. The central portion 41 is a portion that is pressed by the later-described arch-shaped member 58 of the support member 50.

[0130] The side portions 42 are configured to support the left and right sides of the back of the seated person. In addition, the plurality of narrow plate-shaped portions of the side portions 42 extend toward the left and right outer sides, and are formed to be easily moderately flexible so as to flexibly receive the sides of the back of the seated person. Furthermore, the four top ends of the narrow plate-shaped portions of the side portions 42 located on the lower side are connected to each other, and the rigidity is slightly higher than that of the five top ends on the upper side. ​

[0131] On the rear side of the pressure receiving member 40, two mounting hooks 43 are arranged in the upper portion in the left and right directions. The mounting hooks 43 have a C-shaped shape when viewed from the side, and the openings thereof face the rear.

[0132] The support member 50 has a guide wire 51, an upper portion connecting portion 52, a lower portion connecting portion 53, a lower side lifting plate 54 which is an example of a first plate-shaped member, an upper side lifting plate 55 which is an example of a second plate-shaped member, a support portion lifting mechanism 56 (see Figure 8 ), an arch-shaped deformation mechanism 57 (see Figure 8 ), an arch-shaped member 58 which can be flexibly deformed, and a support wire 59.

[0133] The guide wire 51 is a wire which extends long in the up and down directions, and two wires are arranged in parallel in the left and right directions. Further, although not shown, the two guide wires 51 are connected to each other inside the lower portion connecting portion 53, and the entire guide wires 51 have a U-shaped shape.

[0134] The upper portion connecting portion 52 is a portion which connects the upper portions of the two guide wires 51 to each other. The upper portion connecting portion 52 contains resin, and is integrated with the guide wires 51 by embedding the guide wires 51 and molding. On the front surface of the upper portion connecting portion 52, two cylindrical support protrusions 52A which extend in the left and right directions in the axial directions are arranged in the left and right directions. The support protrusions 52A are arranged corresponding to the two mounting hooks 43, and support the pressure receiving member 40 rotatably by engaging with the outside through the mounting hooks 43.

[0135] The lower portion connecting portion 53 is a portion which connects the two guide wires 51 at the lower portions, maintains the rigidity of the lower portions of the guide wires 51, and fixes the lumbar support device LS to the seat back frame F2. The lower portion connecting portion 53 contains resin, and is integrated with the guide wires 51 by embedding the guide wires 51 and molding, and as described above, maintains the lower portions of the guide wires 51 which extend in the left and right directions inside in a U-shaped shape.

[0136] As shown in FIG. 6, on the rear side of the lower portion connecting portion 53, two protrusions 53A which are arranged separately in the left and right directions are provided in the lower portion. The protrusions 53A are portions which abut against the front surface of the lower frame 14 when the lumbar support device LS is assembled to the seat back frame F2. Further, on the rear side of the lower portion connecting portion 53, fixing holes 53B which are arranged in the left and right directions are formed. The fixing holes 53B are holes into which screws (see the screws 91) are screwed, and a screw groove can not be formed. Figure 8 Figure 12

[0137] ​​Further, a restriction portion 53C protruding rearward is provided at the center in the left-right direction of the surface of the rear side of the lower connecting portion 53. The restriction portion 53C is a portion that engages with the lower frame 14 to restrict the position in the vertical direction of the lumbar support device LS. A locking portion 53D slightly extending downward is formed at the rear end portion of the restriction portion 53C, and the lumbar support device LS is hooked to the lower frame 14 by the locking portion 53D (see FIG. 6). Figure 12 Thus, the lumbar support device LS is not easily detached forward.

[0138] The lower-side lifting plate 54 is a member that can move in the vertical direction. Specifically, the lower-side lifting plate 54 moves in the vertical direction while being guided by the guide wires 51. The lower-side lifting plate 54 has guide portions 54A that constitute grooves engaging with the two guide wires 51 at both end portions in the left-right direction, and the guide portions 54A engage with the guide wires 51. The stepping motor 56B of the support portion lifting mechanism 56 and the stepping motor 57B of the arch deformation mechanism 57 are fixed to the rear surface of the lower-side lifting plate 54.

[0139] The upper-side lifting plate 55 is a member that can move in the vertical direction in a direction approaching or separating from the lower-side lifting plate 54. Specifically, the upper-side lifting plate 55 is disposed at a position higher than the lower-side lifting plate 54, and moves in the vertical direction while being guided by the guide wires 51. The upper-side lifting plate 55 has guide portions 55A that constitute grooves engaging with the two guide wires 51 at both end portions in the left-right direction, and the guide portions 55A engage with the guide wires 51.

[0140] The support portion lifting mechanism 56 is a mechanism for lifting the lower-side lifting plate 54 and the upper-side lifting plate 55 as a whole in the vertical direction, and has a screw shaft 56A, a stepping motor 56B, a nut 56C, an upper end fixing portion 56D, and a lower end fixing portion 56E.

[0141] The screw shaft 56A is a rod having a male screw formed on the outer peripheral surface, and extends long in the vertical direction.

[0142] The stepping motor 56B is an electric motor capable of rotating in both directions, in which the output shaft is rotated by a control device not shown.

[0143] The nut 56C is connected to the stepping motor 56B by a gear mechanism not shown, and can rotate in both directions according to the rotation direction of the stepping motor 56B. The nut 56C engages with the screw shaft 56A, and can relatively move up and down with respect to the screw shaft 56A by rotation.

[0144] The upper end fixing portion 56D is provided at the upper end of the screw shaft 56A, and fixes the upper end of the screw shaft 56A to the rear surface of the upper connecting portion 52.

[0145] The lower end fixing portion 56E is provided at the lower end of the screw shaft 56A, and fixes the lower end of the screw shaft 56A to the rear surface of the lower connecting portion 53.

[0146] The arched deformation mechanism 57 is a mechanism for raising and lowering the upper side lifting plate 55 up and down with respect to the lower side lifting plate 54, and has a screw shaft 57A, a stepping motor 57B, a nut 57C, an upper end fixing portion 57D, and a cover 57E.

[0147] The screw shaft 57A is a bar having a male screw formed on an outer peripheral surface, and extends long in the up and down direction.

[0148] The stepping motor 57B is an electric motor capable of rotating in both directions, with an output shaft rotated by a control device not shown.

[0149] The nut 57C is coupled to the stepping motor 57B by a gear mechanism not shown, and is capable of rotating in both directions in accordance with the rotation direction of the stepping motor 57B. The nut 57C is engaged with the screw shaft 57A, and is capable of moving relatively up and down with respect to the screw shaft 57A by rotation.

[0150] The upper end fixing portion 57D is provided at the upper end of the screw shaft 57A, and fixes the upper end of the screw shaft 57A to the rear surface of the upper side lifting plate 55.

[0151] The cover 57E is provided at the lower end of the screw shaft 57A, and suppresses the lower end of the screw shaft 57A from hooking on surrounding objects.

[0152] Returning to Figure 7 The arched member 58 is a band-shaped member extending long in the up and down direction, and is formed of a metal plate or the like having elasticity. The arched member 58 is fixed to the front surface of the lower side lifting plate 54 at the lower end (one end) and to the front surface of the upper side lifting plate 55 at the upper end (the other end) by a rivet or a screw or the like. Two arched members 58 are arranged left and right, and are disposed near the left and right end portions of the lower side lifting plate 54 and the upper side lifting plate 55, and are disposed so as to oppose the rear surface of the central portion 41 of the pressure receiving member 40.

[0153] As shown in Figure 8 The support wire 59 is a wire having a circular cross section, and is disposed so as to extend upward from the left and right end portions of the upper portion connecting portion 52. Two support wires 59 are integrated with the upper portion connecting portion 52 by being embedded and formed in the upper portion connecting portion 52. Further, although not shown, the two support wires 59 are connected to each other at the lower end portions, and constitute one wire having a U-shaped form.

[0154] The support wire 59 is inserted through the support hole 15B (see Figure 6Therefore, the position of the upper part of the lumbar support device LS in the front-back and left-right directions is restricted. At the upper end of the support wire 59, specifically within the range that can abut against the support hole 15B, a cover portion 59A covered with a resin with good sliding properties such as nylon is provided. With the cover portion 59A, even when the support wire 59 slides up and down relative to the support hole 15B when the seat occupant applies or removes the load on the seat back S2, noise generation can be suppressed.

[0155] Here, the operation of the lumbar support device LS will be briefly explained.

[0156] like Figure 9 As shown in (a), when the output shaft of the stepper motor 56B is rotated, the nut 56C rotates, and the nut 56C moves relative to the screw shaft 56A. For example, as Figure 9 As in (a), when the nut 56C moves upward relative to the screw shaft 56A, the upper lifting plate 55 and the lower lifting plate 54 become one unit and move upward. At this time, the upper lifting plate 55 and the lower lifting plate 54 are guided by the guide wire 51 and move while sliding relative to the guide wire 51.

[0157] In addition, such as Figure 9 As shown in (b), when the output shaft of the stepper motor 57B is rotated, the nut 57C rotates, and the nut 57C moves relative to the screw shaft 57A. Here, since the nut 57C cannot move up and down relative to the lower lifting plate 54, the screw shaft 57A moves up and down when the nut 57C rotates. For example, as... Figure 9 As in (b), when the nut 57C is rotated, the screw shaft 57A descends, and as the screw shaft 57A moves, the upper lifting plate 55 moves downward relative to the lower lifting plate 54. At this time, the upper lifting plate 55 is guided by the guide wire 51 and moves while sliding relative to the guide wire 51.

[0158] like Figure 9 As in (b), when the upper lifting plate 55 moves toward the lower lifting plate 54, as Figure 10 As shown, the length of the arched member 58 remains between the upper lifting plate 55 and the lower lifting plate 54, thus causing the arched member 58 to flex forward into an arc shape. Consequently, the front surface of the arched member 58 presses the rear surface of the central portion 41 of the pressure member 40 forward, causing the central portion 41 to deform and protrude forward in an arc shape.

[0159] Thus, by rotating the stepper motor 57B in both directions, the forward protrusion of the pressure-bearing member 40 can be adjusted. Furthermore, by rotating the stepper motor 56B in both directions, the vertical position of the protruding portion of the pressure-bearing member 40 can be adjusted. This provides suitable support for the sitter's lower back.

[0160] likeFigure 8 and Figure 11 As shown, the vehicle seat S also includes an electromagnetic wave sensor 100. (As...) Figure 11 As shown, the radio wave sensor 100 includes a sensor section 110 for acquiring information related to the seated person, and a housing 120 for housing the sensor section 110. The sensor section 110 includes an illumination section 111 for irradiating radio waves onto the seated person, and a detection section 112 for detecting reflected waves of radio waves reflected from the skin surface of the seated person. For example, a microwave Doppler sensor can be used as the radio wave sensor 100.

[0161] The radio wave sensor 100 is disposed on the seat back S2 in the same manner as the pressure-bearing member 40 and the support member 50. In the second embodiment, the radio wave sensor 100 is mounted on the pressure-bearing member 40. Specifically, the radio wave sensor 100 is mounted on the side 42 of the pressure-bearing member 40.

[0162] The side portions 42 extend diagonally forward and to the left and right sides from the left and right ends of the central portion 41, in a manner that tends to move outward in the left and right direction and is located on the front side. For example... Figure 7 and Figure 8 As shown, the side portion 42 includes five first side portions 42A on the upper side having a narrow plate shape, and four second side portions 42B on the lower side of the first side portions 42A having interconnected top ends.

[0163] In detail, the first side portion 42A has a plate-shaped form with a length in the vertical direction that is smaller than its length in the horizontal direction. The second side portion 42B has a plurality of plate-shaped portions 42C, specifically four, arranged at intervals in the vertical direction with a length in the vertical direction that is smaller than its length in the horizontal direction, and a connecting portion 42D that connects the top ends of the four plate-shaped portions 42C and extends in the vertical direction. The second side portion 42B is disposed at the lower part of the pressure-bearing member 40.

[0164] The radio wave sensor 100 is mounted on the right side of the second side portion 42B of the side portion 42. More specifically, the radio wave sensor 100 is mounted on the rear side of the right side of the second side portion 42B. Specifically, the radio wave sensor 100 is disposed on the rear side of the second side portion 42B by a plurality of screws 92 (see reference). Figure 11 The housing 120 is fixed to the second side 42B, thereby being mounted on the rear side of the second side 42B.

[0165] like Figure 8As shown, the electric wave sensor 100 is arranged at the lower portion of the pressure receiving member 40 via the second side portion 42B arranged at the lower portion of the pressure receiving member 40. In addition, the electric wave sensor 100 is arranged so as to span the plurality of plate-shaped portions 42C in the vertical direction. Specifically, the electric wave sensor 100 is arranged so as to span the two plate-shaped portions 42C on the upper side in the vertical direction.

[0166] In addition, when viewed from the rear side, the electric wave sensor 100 is arranged at a position that does not overlap the support member 50. In other words, when viewed from the rear side, the electric wave sensor 100 is arranged at a position that is different from the support member 50. Specifically, the electric wave sensor 100 is arranged at a position that is offset to the left and right, specifically to the right, with respect to the lower side lift plate 54 of the support member 50. The position at which the electric wave sensor 100 is arranged is a position that is not pressed by the arch-shaped member 58 of the support member 50.

[0167] According to the second embodiment described above, by mounting the electric wave sensor 100 to the side portion 42 of the pressure receiving member 40, the electric wave sensor 100 can be arranged without interfering with the operation of the support member 50 and the pressure receiving member 40.

[0168] In addition, the electric wave sensor 100 is mounted to the face of the rear side of the side portion 42, and thus it is possible to suppress the feeling of contact from the electric wave sensor 100 being felt by the occupant seated in the vehicle seat S via the seat back pad P2.

[0169] In addition, the side portion 42 extends obliquely forward toward the left and right outer sides from the left and right ends of the central portion 41, and thus it is possible to easily arrange the electric wave sensor 100 toward the occupant. By arranging the electric wave sensor 100 toward the occupant, it is possible to improve the detection accuracy of the electric wave sensor 100.

[0170] In addition, by the first side portion 42A being a narrow plate shape, it is possible to secure the amount of deflection of the side portion 42 of the pressure receiving member 40 by the first side portion 42A. In addition, by the second side portion 42B being a shape in which the tips of the plurality of narrow plate-shaped portions 42C are joined to each other, it is possible to improve the rigidity of the second side portion 42B on which the electric wave sensor 100 is mounted, and thus it is possible to improve the mounting rigidity of the electric wave sensor 100. That is, according to the second embodiment, it is possible to achieve both securing the amount of deflection of the side portion 42 of the pressure receiving member 40 and improving the mounting rigidity of the electric wave sensor 100.

[0171] In addition, the second side portion 42B is arranged at the lower portion of the pressure receiving member 40, and thus it is possible to suppress the feeling of contact from the second side portion 42B on which the electric wave sensor 100 is mounted being felt by the occupant along with the operation of the support member 50 and the pressure receiving member 40.

[0172] Furthermore, the radio wave sensor 100 is configured to span multiple plate-shaped portions 42C across the side portion 42 (second side portion 42B), so that radio waves can be irradiated between the plate-shaped portions 42C and reflected waves of the radio waves can be detected between the plate-shaped portions 42C. Thus, the radio wave sensor 100 can effectively irradiate and detect radio waves.

[0173] Furthermore, the radio wave sensor 100 can also be like... Figure 8 The imaginary line in the middle indicates that the second side 42B is installed on the left side, not on the right side 42B.

[0174] Alternatively, the radio wave sensor 100 may be mounted on the first side 42A instead of the second side 42B. Furthermore, when the radio wave sensor 100 is mounted on the first side 42A, it may be configured to span multiple first sides 42A in the vertical direction. In this case, the multiple first sides 42A correspond to "multiple plate-shaped portions".

[0175] Alternatively, the radio wave sensor 100, for example, if it is a small radio wave sensor that is difficult to feel when touched, can be installed on the front side of the side 42 instead of the rear side of the side 42.

[0176] Next, the third embodiment will be described. Furthermore, in the following, aspects that are the same as those described previously, such as those marked with the same symbols in the accompanying drawings, will be omitted from the description, while aspects that are different from those described previously will be described in detail.

[0177] like Figure 12 As shown, in the third embodiment, the radio wave sensor 100 is mounted on the support member 50. More specifically, the radio wave sensor 100 is mounted on the lower lifting plate 54 of the support member 50. More specifically, the radio wave sensor 100 is mounted on the rear surface of the lower lifting plate 54. Specifically, the radio wave sensor 100 is disposed on the rear side of the lower lifting plate 54, and the housing 120 is fixed to the lower lifting plate 54 by a plurality of screws (not shown), thereby mounting it on the rear surface of the lower lifting plate 54.

[0178] The radio wave sensor 100 is positioned to avoid screw shafts 56A and 57A, or stepper motors 56B and 57B. Specifically, the radio wave sensor 100 is positioned offset to the left and right relative to screw shafts 56A and 57A, and offset vertically relative to stepper motors 56B and 57B. In the third embodiment, the radio wave sensor 100 is positioned to the right of screw shaft 56A and above stepper motor 56B. The position where the radio wave sensor 100 is positioned is not clamped by the pressure member 40 and the support member 50, and is not clamped by the lower lifting plate 54 and the upper lifting plate 55.

[0179] like Figure 13 As shown in (a), the vehicle seat S of the third embodiment also includes a sensor orientation changing mechanism 70. The sensor orientation changing mechanism 70 is a mechanism for changing the orientation of the radio wave sensor 100 according to the position of the radio wave sensor 100 in the vertical direction, and includes a control device 71 and an actuator 72.

[0180] Actuator 72 may include, for example, a stepper motor and gear mechanism (not shown) and a oscillating shaft 72C.

[0181] A stepper motor is an electric motor that can rotate in both directions by rotating its output shaft through a control device 71.

[0182] The gear mechanism has multiple gears that reduce the driving force from the stepper motor and transmit it to the oscillating shaft 72C.

[0183] The swing axis 72C is configured along the left-right direction. For example... Figure 13 (b) Figure 13 As shown in (c), the sensor part 110 of the radio wave sensor 100 is fixed to the swing shaft 72C and is supported in a manner that swings up and down relative to the housing 120.

[0184] The control device 71 drives the actuator 72 to control the orientation of the sensor section 110 of the radio wave sensor 100. Specifically, the control device 71 detects the vertical position of the radio wave sensor 100 and drives the actuator 72 to control the orientation of the sensor section 110. The control device 71 detects the vertical position of the radio wave sensor 100 based on the operation history of the stepper motor 56B that drives the screw shaft 56A of the lifting mechanism 56 of the support section.

[0185] Here, an example of the sensor's orientation toward the changing mechanism 70 will be described.

[0186] like Figure 13 As shown in (b), when the lower lifting plate 54 is lowered, the control device 71 drives the actuator 72 to make the sensor section 110 of the radio wave sensor 100 face the back of the seated person. Specifically, when the lower lifting plate 54 is lowered and the radio wave sensor 100 moves downward, the control device 71 drives the actuator 72 to swing the swing shaft 72C in the counterclockwise direction shown in the figure, so that the sensor section 110 faces forward and upward.

[0187] In addition, such as Figure 13As shown in (c), when the lower lifting plate 54 rises, the control device 71 drives the actuator 72 to make the sensor section 110 of the radio wave sensor 100 face the back of the seated person. Specifically, when the lower lifting plate 54 rises and the radio wave sensor 100 moves upward, the control device 71 drives the actuator 72 to swing the swing shaft 72C clockwise as shown in the figure, so that the sensor section 110 faces forward.

[0188] By controlling the actuator 72 as described above using the control device 71, the orientation of the radio wave sensor 100 (sensor section 110) can be changed to face the back of the seated person according to the vertical position of the radio wave sensor 100. As a result, information related to the seated person can be appropriately acquired through the radio wave sensor 100.

[0189] According to the third embodiment described above, by installing the radio wave sensor 100 on the rear side of the lower lifting plate 54, the radio wave sensor 100 can be provided without hindering the operation of the support member 50 and the pressure member 40.

[0190] In addition, the sensor orientation changing mechanism 70 enables the radio wave sensor 100 to be oriented in a suitable direction regardless of its position in the vertical direction, thereby improving the detection accuracy of the radio wave sensor 100.

[0191] Furthermore, such as Figure 14 As shown, the radio wave sensor 100 can also be installed on the upper lifting plate 55 instead of the lower lifting plate 54. More specifically, the radio wave sensor 100 can also be installed on the rear side of the upper lifting plate 55. Thus, the radio wave sensor 100 can be installed without hindering the movement of the support member 50 and the pressure member 40.

[0192] Alternatively, for example, even if the position of the radio wave sensor 100 changes in the vertical direction, as long as the impact on its detection accuracy is small, the structure can be one that does not include a sensor orientation changing mechanism.

[0193] The second and third embodiments described above can be adapted and implemented as illustrated below.

[0194] For example, the side portion 42 of the pressure-bearing member 40 may not be a structure having multiple narrow plate-shaped portions as illustrated in the second and third embodiments. For example, the side portion may be a shape in which all the top ends of the narrow plate-shaped portions are connected to each other. In addition, the side portion may not only be the top ends of the narrow plate-shaped portions, but may also be a shape in which they are all connected to each other. In addition, the side portion may be a structure that extends only from a portion of the left and right ends of the central portion, for example, the upper portions of the left and right ends of the central portion toward the left and right sides. In addition, the side portion may not extend obliquely forward toward the left and right sides, but only toward the left and right sides. In addition, when the radio wave sensor is mounted on the support member, the pressure-bearing member may be a structure that does not include the side portion.

[0195] In addition, in the second and third embodiments, the pressure-bearing member 40, the support member 50, and the electromagnetic wave sensor 100 are disposed on the seat back S2, but the pressure-bearing member, the support member, and the electromagnetic wave sensor may also be disposed on the seat cushion S1. For example, the seat cushion S1 may replace the cushion member 25 (see reference). Figure 6 The seat cushion S1 is equipped with a pressure-bearing member, a support member, and an electromagnetic wave sensor. Furthermore, when the support member is installed on the seat cushion S1, the upper side corresponds to the "seat passenger side," and the lower side corresponds to the "side opposite to the seat passenger side." Additionally, in this case, the second plate-shaped member of the support member moves in the front-back direction, which corresponds to an "orthogonal direction orthogonal to the left-right direction." Alternatively, the pressure-bearing member, support member, and electromagnetic wave sensor can be installed on both the seat cushion S1 and the seat back S2, respectively.

[0196] Furthermore, in the embodiments described above, a vehicle seat S mounted on a car is exemplified as a vehicle seat, but the embodiment is not limited to this. For example, a vehicle seat can also be a seat mounted on a railway vehicle. Additionally, a vehicle seat can also be a seat mounted on a vehicle other than a car, such as a ship or an airplane.

[0197] Furthermore, the components described in the above-described embodiments and variations can be combined in any way.

Claims

1. A vehicle seat including a seat cushion and a seat back, the vehicle seat characterized by comprising: a plate-shaped pressure receiving member that receives a load from a seated person; and an electric wave sensor that detects a reflected wave of an electric wave radiated toward the seated person and acquires information relating to the seated person, and that is fixed to the pressure receiving member, wherein the pressure receiving member has: a plurality of first ribs that project from a back surface, which is a surface on a side opposite to the side of the seated person, toward the side opposite to the side of the seated person; and a plurality of second ribs that project from the back surface toward the side opposite to the side of the seated person, and that cross the plurality of first ribs, the electric wave sensor has at least one fixing portion that is fixed to the pressure receiving member, the fixing portion includes a first fixing portion that is fixed to a surrounding region surrounded by the plurality of first ribs and the plurality of second ribs in the back surface.

2. The vehicle seat according to claim 1, wherein the electric wave sensor has a sensor portion that acquires information relating to the seated person, a housing that houses the sensor portion, and a plurality of the first fixing portions, the plurality of first fixing portions are provided to project from a surface of the housing on the side of the seated person, the plurality of first fixing portions are respectively inserted into the surrounding regions surrounded by the plurality of first ribs and the plurality of second ribs, and are fixed to the back surface.

3. The vehicle seat according to claim 2, wherein the pressure receiving member has a plurality of the surrounding regions, and the first fixing portions are respectively fixed to different surrounding regions.

4. The vehicle seat according to claim 3, wherein the surrounding regions are respectively each provided at least one on each of left and right sides of a center in a left-right direction of the pressure receiving member.

5. The vehicle seat according to any one of claims 1 to 4, wherein the pressure receiving member and the electric wave sensor are provided to the seat back.

6. The vehicle seat according to claim 5, wherein the electric wave sensor is disposed at a lower portion of the pressure receiving member, and further comprising: a mounting wire that is used to mount the pressure receiving member to a frame of the vehicle seat, the mounting wire has a pair of extension portions that extend in a direction orthogonal to the left-right direction, and that support the pressure receiving member, and the surrounding regions are provided between the pair of extension portions in the left-right direction.

8. The vehicle seat according to any one of claims 1 to 4, wherein the fixing portion is fixed to the pressure receiving member by a screw.

9. The vehicle seat according to claim 1, wherein the pressure receiving member has a center portion located at a center in a left-right direction, and left and right side portions located on left and right outer sides of the center portion, and the electric wave sensor is mounted to the side portions of the pressure receiving member, and further comprising: a support member that supports the pressure receiving member from a back surface side, and that changes a shape of the pressure receiving member, the support member has: a first plate-shaped member; and a second plate-shaped member that is provided to be orthogonal to the first plate-shaped member, and that is provided to be closer to the back surface than the first plate-shaped member, and the first plate-shaped member and the second plate-shaped member are provided to be closer to the back surface than the electric wave sensor. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. The seat for vehicle according to any one of claims 1 to 4, characterized by, ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10. The seat for a vehicle according to claim 9, characterized by ​ ​ ​ ​ The second plate-shaped member moves in a direction that is orthogonal to the left and right directions, towards a direction that is closer to or separates from the first plate-shaped member. as well as An arched member capable of flexing and deforming has one end fixed to the first plate-shaped member and the other end fixed to the second plate-shaped member. When the second plate-shaped member moves toward the first plate-shaped member, it flexes toward the seated person, pressing the central portion of the pressure-bearing member toward the seated person.

11. The vehicle seat according to claim 2, characterized in that, The housing is oriented toward the first rib and the second rib.

12. A vehicle seat, comprising a seat cushion and a seat back, characterized in that it includes: A plate-shaped compression member that bears the load from the seated person; A support member supports the pressure-bearing member from the side opposite to the seated person's side and causes the shape of the pressure-bearing member to change. as well as The radio wave sensor detects the reflected waves of radio waves shone towards the seated person and obtains information related to the seated person. The supporting member has the following characteristics: First plate-shaped member; The second plate-shaped member moves in a direction orthogonal to the left-right direction, towards a direction that approaches or separates from the first plate-shaped member; and An arched member, capable of flexural deformation, is fixed at one end to the first plate-shaped member and at the other end to the second plate-shaped member. As the second plate-shaped member moves towards the first plate-shaped member, it flexes towards the seated person, pressing the pressure member towards the seated person. The radio wave sensor is mounted on the side of the first or second plate-shaped member opposite to the seated person's side. The vehicle seat further includes a sensor orientation changing mechanism, which changes the orientation of the radio wave sensor based on the position of the radio wave sensor in the orthogonal direction.

13. The vehicle seat according to claim 12, characterized in that, The pressure-bearing component, the support component, and the electromagnetic wave sensor are disposed on the back of the seat. The electromagnetic wave sensor is mounted on the first plate-shaped member. When the first plate-shaped member moves upward, the sensor orientation changing mechanism changes the orientation of the radio wave sensor to the downward direction.

14. The vehicle seat according to claim 12, characterized in that, The pressure-bearing component, the support component, and the electromagnetic wave sensor are disposed on the back of the seat. The electromagnetic wave sensor is mounted on the first plate-shaped member. When the first plate-shaped member moves downward, the sensor orientation changing mechanism changes the orientation of the radio wave sensor to the upward direction.

15. The seat for a vehicle according to claim 12, wherein Also includes: Control device and support lifting mechanism, The control device detects the position of the electromagnetic sensor in the vehicle seat based on the motion history of the lifting mechanism of the support unit.

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