JP2022104317A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat in which a radio wave sensor can be disposed without hindering operations of a support member and a pressure receiving member.SOLUTION: A vehicular seat has in a seat back: a plate-like pressure receiving member 40 that receives a load from a seated person; a support member 50 that supports the pressure receiving member 40 from a rear side and changes the shape of the pressure receiving member 40; and a radio wave sensor 100. The support member 50 has: a lower lifting/lowering plate 54; an upper lifting/lowering plate 55 which moves vertically; an arch member 58 which is deformable in a deflected manner and one end of which is fixed to the lower lifting/lowering plate 54 and the other end of which is fixed to the upper lifting/lowering plate 55, wherein, when the upper lifting/lowering plate 55 moves closer to the lower lifting/lowering plate 54, the arch member 58 bends forward to pressurize the pressure receiving member 40 forward. The pressure receiving member 40 has: a middle portion 41 located at the middle in a right and left direction and pressurized by the arch member 58; and right and left side portions 42 arranged in both the right and left sides of the middle portion 41. A radio wave sensor 100 is attached to each side portion 42.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle seat provided with a seat cushion and a seat back.

Conventionally, as a vehicle seat, a plate-shaped pressure receiving member that receives a load from a seater and a support member that supports the pressure receiving member and includes a support member that changes the shape of the pressure receiving member are known. (Patent Document 1). In this technique, the support member has a lower elevating plate, an upper elevating plate that moves up and down with respect to the lower elevating plate, an upper end fixed to the upper elevating plate, and a lower end fixed to the lower elevating plate. It is a deformable arch member and has an arch member that bends forward and pushes the pressure receiving member forward when the upper elevating plate moves in a direction approaching the lower elevating plate.

Japanese Patent No. 6572973

By the way, in recent years, a radio wave sensor may be provided on a vehicle seat in order to detect a seated person's heartbeat, respiration, or the like. When such a radio wave sensor is provided on a vehicle seat provided with a pressure receiving member and a supporting member as described above, it is desirable that the radio wave sensor can be arranged without interfering with the operation of the supporting member and the pressure receiving member.

Therefore, an object of the present invention is to provide a vehicle seat on which a radio wave sensor can be arranged without interfering with the operation of the support member and the pressure receiving member.
It also aims to prevent the seated person from feeling a hit.
Another object of the present invention is to facilitate the placement of the radio wave sensor toward the seated person.
Another object of the present invention is to secure the amount of bending of the side portion of the pressure receiving member and to improve the mounting rigidity of the radio wave sensor.
It is also intended that the radio wave sensor irradiates and detects radio waves satisfactorily.
It also aims to improve the detection accuracy of the radio wave sensor.

The vehicle seat for achieving the above-mentioned object is a vehicle seat provided with a seat cushion and a seat back, and the plate-shaped pressure receiving member that receives the load from the seater and the pressure receiving member on the seater side are A support member that supports from the opposite side, a support member that changes the shape of the pressure receiving member, and a radio wave sensor that detects reflected waves of radio waves radiated toward the seated person and acquires information about the seated person. The support member includes a first plate-shaped member and a second plate-shaped member that moves in a direction orthogonal to the left-right direction and is close to or away from the first plate-shaped member. One end is fixed to the first plate-shaped member, and the other end is a flexible and deformable arch member fixed to the second plate-shaped member, and the second plate-shaped member is fixed to the first plate-shaped member. It has an arch member that bends toward the occupant side and presses the pressure receiving member toward the occupant side when moving in a close direction, and the pressure receiving member is a central portion located at the center in the left-right direction. It has a central portion pressed by the arch member and left and right side portions arranged on both left and right sides of the central portion, and the radio wave sensor is attached to the side portions.

According to such a configuration, the radio wave sensor can be arranged without interfering with the operation of the support member and the pressure receiving member.

In the vehicle seat described above, the radio wave sensor may be configured to be attached to the surface of the side portion opposite to the seated side.

According to this, it is possible to suppress the seated person from feeling a hit feeling from the radio wave sensor when sitting on the vehicle seat.

In the vehicle seat described above, the side portions may be configured to extend from the left and right ends of the central portion so as to be located on the seater side toward the outside in the left-right direction.

According to this, it is possible to easily arrange the radio wave sensor toward the seated person.

In the vehicle seat described above, the side portion has a plate shape in which the length in the orthogonal direction is smaller than the length in the left-right direction, and the side portion has a length in the orthogonal direction smaller than the length in the left-right direction. A plate-shaped portion including a plurality of plate-shaped portions arranged at intervals in the orthogonal direction and a second side portion having a connecting portion connecting the tips of the plurality of plate-shaped portions. The radio wave sensor may be configured to be attached to the second side portion.

According to this, the amount of deflection of the side portion of the pressure receiving member can be secured by the first side portion, and the rigidity of the second side portion to which the radio wave sensor is mounted can be improved, so that the mounting rigidity of the radio wave sensor can be improved. Can be improved. That is, it is possible to secure the amount of bending of the side portion of the pressure receiving member and improve the mounting rigidity of the radio wave sensor at the same time.

In the vehicle seat described above, the pressure receiving member, the supporting member, and the radio wave sensor may be provided on the seat back, and the second side portion may be arranged below the pressure receiving member. ..

According to this, it is possible to suppress the seated person from feeling a hit feeling from the second side portion to which the radio wave sensor is attached due to the operation of the support member and the pressure receiving member.

In the vehicle seat described above, the side portion is a plate-shaped portion whose length in the orthogonal direction is smaller than the length in the left-right direction, and a plurality of plate-shaped portions arranged at intervals in the orthogonal direction are formed. The radio wave sensor may be configured to be arranged so as to straddle the plurality of plate-shaped portions in the orthogonal direction.

According to this, the radio wave can be radiated from between the plate-shaped portions, and the reflected wave of the radio wave can be detected through between the plate-shaped portions, so that the radio wave sensor can satisfactorily irradiate and detect the radio wave.

Further, the vehicle seat for achieving the above-mentioned object is a vehicle seat provided with a seat cushion and a seat back, and the plate-shaped pressure receiving member that receives the load from the seater and the pressure receiving member on the seater side. A support member that supports from the opposite side, a support member that changes the shape of the pressure receiving member, and a radio wave sensor that detects reflected waves of radio waves radiated toward the seated person and acquires information about the seated person. The support member has a second plate shape that moves in a direction orthogonal to the first plate-shaped member in the left-right direction and moves in a direction closer to or away from the first plate-shaped member. The member and one end are fixed to the first plate-shaped member, and the other end is a flexible and deformable arch member fixed to the second plate-shaped member, and the second plate-shaped member is the first plate-shaped member. The radio wave sensor has the first plate-shaped member or the second plate, which has an arch member that bends toward the seated side and presses the pressure receiving member toward the seated person when moving in a direction close to the member. It is characterized in that it is attached to the surface of the shaped member opposite to the seated side.

According to such a configuration, the radio wave sensor can be arranged without interfering with the operation of the support member and the pressure receiving member.

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

According to this, the radio wave sensor can be directed 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.

In the vehicle seat described above, the pressure receiving member, the support member, and the radio wave sensor may be configured to be provided on the seat back.

In the vehicle seat described above, the radio wave sensor may be configured to be a sensor that detects at least one of the heartbeat and the respiration of the seated person.

According to the present invention, the radio wave sensor can be arranged without interfering with the operation of the support member and the pressure receiving member.

Further, by attaching the radio wave sensor to the surface of the side opposite to the seated side, it is possible to suppress the seated person from feeling a hit from the radio wave sensor.

Further, by adopting a configuration in which the side portion extends so as to be located on the seated person side as it goes outward in the left-right direction, it is possible to facilitate the arrangement of the radio wave sensor toward the seated person.

Further, the side portion includes a first side portion having a narrow plate shape and a second side portion having a shape in which a plurality of narrow plate-shaped portions are connected, and the radio wave sensor is attached to the second side portion. Therefore, it is possible to secure the amount of bending of the side portion of the pressure receiving member and improve the mounting rigidity of the radio wave sensor at the same time.

Further, by providing the pressure receiving member, the support member and the radio wave sensor on the seat back and arranging the second side portion under the pressure receiving member, the second side to which the radio wave sensor is attached according to the operation of the support member and the pressure receiving member. It is possible to suppress the seated person from feeling a hit from the part.

Further, by arranging the radio wave sensor so as to straddle a plurality of plate-shaped portions on the side portion of the pressure receiving member, the radio wave sensor can satisfactorily irradiate and detect the radio wave.

Further, by providing the sensor orientation changing mechanism, the detection accuracy of the radio wave sensor can be improved.

It is a perspective view of the vehicle seat which concerns on 1st Embodiment. It is a perspective view of a seat frame and a lumbar support device. It is a perspective view of the state where the lumbar support device is removed from a seat frame. It is a rear view of the lumbar support device. It is a figure explaining the operation of the support member, and is the figure (a) which shows the state which the upper elevating plate and the lower elevating plate are raised, and the figure (b) which shows the state which the upper elevating plate is lowered. It is a perspective view of the support member in a state where the upper elevating plate is lowered and the arch member is bent forward. It is a figure which shows the pressure receiving member and the radio wave sensor. It is a perspective view which looked at the lower part of the seat back frame and the lumbar support device of the vehicle seat which concerns on 2nd Embodiment from the rear side. It is a block diagram (a) of the sensor orientation change mechanism, the figure (b) which shows the state which the lower elevating plate is lowered, and the figure (c) which shows the state which the lower elevating plate is raised. It is a figure which shows the modification of 2nd Embodiment.

Next, the first embodiment will be described in detail with reference to the drawings as appropriate. In this specification, front-back, left-right, and up-down are based on front-back, left-right, and up-down as seen from the person sitting on the seat (seated person). Further, in the embodiment, the front side corresponds to the "seat side", the rear side corresponds to the "side opposite to the seater side", and the vertical direction corresponds to the "orthogonal direction orthogonal to the left-right direction".

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 seat frame F (see FIG. 2) is provided with a pad made of urethane foam or the like. It consists of being covered with a skin made of fabric or leather.

Specifically, the vehicle seat S includes a seat cushion S1, a seat back S2, and a headrest S3. The seat cushion S1 is configured by covering the seat cushion frame F1, which will be described later, with the seat cushion pad P1 and the seat cushion skin U1. Further, the seat back S2 is configured by covering the seat back frame F2, which will be described later, with the seat back pad P2 and the seat back skin U2.

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.

The seat cushion frame F1 includes a pair of side frames 21 arranged apart from each other on the left and right sides, a pan frame 22 for connecting the front portions of the side frames 21, and a rear frame 24 for connecting the rear portions of the side frames 21. I have.
The side frame 21 and the pan frame 22 are members made of sheet metal, and the rear frame 24 is a member made of pipe material.
The seat cushion frame F1 supports a mat member 25 that receives a load from a seated person. The mat member 25 has a plurality of metal wires extending back and forth while alternately bending left and right, and a plurality of resin portions integrally molded with the metal wires, and is bridged between the pan frame 22 and the rear frame 24. It is arranged in the state.

As shown in FIG. 3, the seat back frame F2 bends a pair of sheet metal frames 12 arranged apart from each other on the left and right and a pipe material connected to the upper ends of each of the pair of sheet metal frames 12 in a U shape. The pipe frame 13 is provided.
The pipe frame 13 has a pair of left and right upper side frames 13A that extend straight up from the sheet metal frame 12 and are slightly inclined inward to the left and right. The left and right sheet metal frames 12 and the upper side frame 13A are a pair of side frames 11 arranged apart from each other on the left and right. Further, the pipe frame 13 has an upper frame 13B that connects the upper end portions of the pair of upper side frames 13A, that is, the upper end portions of the side frames 11.

Further, the seat back frame F2 includes a lower frame 14 that connects the lower portions of the side frames 11, specifically, the lower portions of the sheet metal frame 12, and the upper portions of the side frames 11 at positions below the upper frame 13B. In particular, it has a bridge frame 15 that connects the left and right upper side frames 13A to each other.

The lower frame 14 is a member made of sheet metal having a cross-sectional shape in which the upper edge and the lower edge extend slightly forward. The lower frame 14 extends long in the left-right direction, and the left and right ends are fixed to the left and right inward extending portions of the sheet metal frame 12 by welding. At the center of the lower frame 14 (lower part of the seat back frame F2), two mounting holes 14A arranged slightly apart from each other on the left and right are formed. The lower frame 14 faces in the front-rear direction in a normal posture in which the seat back frame F2 is not reclining, and the mounting hole 14A penetrates the lower frame 14 in the front-rear direction. The mounting hole 14A is a portion through which a screw 91 (see FIG. 8) for fixing the lower hooking portion 60 of the lumbar support device LS, which will be described later, to the lower frame 14 is inserted.

The crosslinked frame 15 has a lower flange 15A extending forward at the lower edge. The lower flange 15A is formed with a support hole 15B that penetrates in the vertical direction. One support hole 15B is formed at each of the left and right ends of the lower flange 15A.

The seat back frame F2 supports the lumbar support device LS. The lumbar support device LS receives the force that the seated person leans against the seat back S2 and transmits it to the seat back frame F2, and changes the shape of the part that hits the seated person's lumbar region to support the lumbar region according to the seated person's preference. It is a device for changing the state.
The lumbar support device LS supports the pressure receiving member 40 that receives the load from the back of the seated person via the seat back pad P2 (see FIG. 1) and the pressure receiving member 40 from the rear side, and changes the shape of the pressure receiving member 40. The support member 50 is provided with a support member 50 and a lower hooking portion 60 for fixing the lower portion of the support member 50 (lumbar support device LS) to the lower frame 14.

The pressure receiving member 40 is a plate-shaped member made of resin or the like, and is a pair of left and right members arranged in the central portion 41 located in the center in the left-right direction and on the left and right sides of the central portion 41 and projecting forward from the central portion 41. It has a side portion 42.
The central portion 41 is located directly behind the back of the seated person. The central portion 41 is a portion pressed by the arch member 58 described later of the support member 50.

The side portions 42 are arranged so as to support both the left and right sides of the back of the seated person. In addition, a plurality of narrow plate-shaped side portions 42 extend outward to the left and right, and are formed to be moderately flexible so that the side portions of the back of the seated person can be flexibly received. There is. The narrow plate-shaped portion of the side portion 42 has four tips arranged on the lower side connected to each other, and has a slightly higher rigidity than the five on the upper side.

On the rear surface of the pressure receiving member 40, two mounting hooks 43 are arranged side by side on the upper side. The mounting hook 43 has a C-shape when viewed from the side, and its opening faces rearward.

The support member 50 includes a guide wire 51, an upper connecting portion 52, a lower connecting portion 53, a lower elevating plate 54 as an example of a first plate-shaped member, and an upper elevating plate as an example of a second plate-shaped member. It has a support portion elevating mechanism 56 (see FIG. 4), an arch deformation mechanism 57 (see FIG. 4), a flexible and deformable arch member 58, and a support wire 59.

The guide wire 51 is a wire that extends vertically long, and two guide wires 51 are arranged in parallel so as to be separated from each other on the left and right sides. Although not shown, the two guide wires 51 are connected in the lower connecting portion 53, and are U-shaped wires as a whole.

The upper connecting portion 52 is a portion that connects the upper portions of the two guide wires 51 to each other. The upper connecting portion 52 is made of resin and is integrated with the guide wire 51 by insert-molding the guide wire 51. On the front surface of the upper connecting portion 52, two columnar support projections 52A whose axes extend in the left-right direction are arranged side by side. The support protrusions 52A are arranged corresponding to the two mounting hooks 43, and the mounting hooks 43 engage with the outside to rotatably support the pressure receiving member 40.

The lower connection portion 53 is a portion for connecting the two guide wires 51 at the lower portion, maintaining the rigidity of the lower portion of the guide wires 51, and fixing the lumbar support device LS to the seat back frame F2. The lower connection portion 53 is made of resin and is integrated with the guide wire 51 by insert molding the guide wire 51. As described above, the lower portion extending to the left and right of the U-shaped guide wire 51 is inside. Hold on to.

As shown in FIG. 4, on the rear surface of the lower connecting portion 53, two protrusions 53A arranged apart from each other on the left and right are provided at the lower portion. The protrusion 53A is a portion that comes into contact with 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 surface of the lower connecting portion 53, fixing holes 53B arranged side by side are formed. The fixing hole 53B is a hole into which the screw 91 (see FIG. 8) is screwed, and the screw groove may or may not be formed.

Further, a restricting portion 53C projecting rearward is provided at the central portion in the left-right direction on the rear surface of the lower connecting portion 53. The regulating portion 53C is a portion that engages on the lower frame 14 to regulate the vertical position of the lumbar support device LS. At the rear end of the restricting portion 53C, a hooking portion 53D extending slightly downward is formed, and the hooking portion 53D is hooked on the lower frame 14 (see FIG. 8), so that the lumbar support device LS moves forward. It is hard to come off.

The lower elevating plate 54 is a member that can move in the vertical direction. Specifically, the lower elevating plate 54 moves in the vertical direction while being guided by the guide wire 51. The lower elevating plate 54 has guide portions 54A forming grooves that engage with each of the two guide wires 51 at both left and right ends, and the guide portions 54A are engaged with the guide wires 51. A stepping motor 56B of the support portion elevating mechanism 56 and a stepping motor 57B of the arch deformation mechanism 57 are fixed to the rear surface of the lower elevating plate 54.

The upper elevating plate 55 is a member that can move in the vertical direction and in a direction closer to or away from the lower elevating plate 54. Specifically, the upper elevating plate 55 is arranged above the lower elevating plate 54 and moves in the vertical direction while being guided by the guide wire 51. The upper elevating plate 55 has guide portions 55A forming grooves that engage with each of the two guide wires 51 at both left and right ends, and the guide portions 55A are engaged with the guide wires 51.

The support part elevating mechanism 56 is a mechanism for raising and lowering the entire lower elevating plate 54 and the upper elevating plate 55 up and down, and includes a screw shaft 56A, a stepping motor 56B, a nut 56C, an upper end fixing portion 56D, and a lower end. It has a fixed portion 56E.
The screw shaft 56A is a rod having a male screw formed on its outer peripheral surface, and extends vertically and vertically.
The stepping motor 56B is an electric motor capable of forward / reverse rotation in which the output shaft is rotated by a control device (not shown).
The nut 56C is connected to the stepping motor 56B by a gear mechanism (not shown), and can rotate forward and backward according to the rotation direction of the stepping motor 56B. The nut 56C is engaged with the screw shaft 56A and can move up and down relative to the screw shaft 56A by rotating.
The upper end fixing portion 56D is provided at the upper end of the screw shaft 56A, and the upper end of the screw shaft 56A is fixed to the rear surface of the upper connecting portion 52.
The lower end fixing portion 56E is provided at the lower end of the screw shaft 56A, and the lower end of the screw shaft 56A is fixed to the rear surface of the lower connecting portion 53.

The arch deformation mechanism 57 is a mechanism for raising and lowering the upper elevating plate 55 up and down with respect to the lower elevating plate 54, and includes a screw shaft 57A, a stepping motor 57B, a nut 57C, an upper end fixing portion 57D, and a cap. It has 57E.
The screw shaft 57A is a rod having a male screw formed on its outer peripheral surface, and extends vertically and vertically.
The stepping motor 57B is an electric motor capable of forward / reverse rotation in which the output shaft is rotated by a control device (not shown).
The nut 57C is connected to the stepping motor 57B by a gear mechanism (not shown), and can rotate forward and backward according to the rotation direction of the stepping motor 57B. The nut 57C is engaged with the screw shaft 57A and can move up and down relative to the screw shaft 57A by rotating.
The upper end fixing portion 57D is provided at the upper end of the screw shaft 57A, and the upper end of the screw shaft 57A is fixed to the rear surface of the upper elevating plate 55.
The cap 57E is provided at the lower end of the screw shaft 57A to prevent the lower end of the screw shaft 57A from being caught by a surrounding object.

Returning to FIG. 3, the arch member 58 is a strip-shaped member that extends vertically long and is formed of an elastic metal plate or the like. The lower end (one end) of the arch member 58 is fixed to the front surface of the lower elevating plate 54 and the upper end (the other end) is fixed to the front surface of the upper elevating plate 55 by rivets, screws, or the like. Two arch members 58 are provided side by side, arranged near the left and right ends of the lower elevating plate 54 and the upper elevating plate 55, and face the rear surface of the central portion 41 of the pressure receiving member 40. Have been placed.

As shown in FIG. 4, the support wire 59 is a wire having a circular cross section arranged so as to extend upward from the left and right ends of the upper connecting portion 52. The two support wires 59 are integrated with the upper connecting portion 52 by being insert-molded into the upper connecting portion 52. Although not shown, the two support wires 59 are connected to each other at the lower end and consist of one U-shaped wire.

The support wire 59 is inserted into the support hole 15B (see FIG. 2) of the cross-linking frame 15. As a result, the positions of the upper part of the lumbar support device LS in the front-rear direction and the left-right direction are restricted. A covering portion 59A coated with a resin having good slidability such as nylon is provided in the upper end portion of the support wire 59, specifically, in a range capable of contacting the support hole 15B. The covering portion 59A suppresses noise generation even if the support wire 59 slides up and down with respect to the support hole 15B when the seated person applies a load to the seat back S2 or removes the load. can do.

Here, the operation of the lumbar support device LS will be briefly described.
As shown in FIG. 5A, by rotating the output shaft of the stepping motor 56B, when the nut 56C rotates, the nut 56C moves relative to the screw shaft 56A. For example, as shown in FIG. 5A, when the nut 56C moves upward with respect to the screw shaft 56A, the upper elevating plate 55 and the lower elevating plate 54 move upward as a unit. At this time, the upper elevating plate 55 and the lower elevating plate 54 are guided by the guide wire 51 and move while sliding with respect to the guide wire 51.

Further, as shown in FIG. 5B, when the nut 57C is rotated by rotating the output shaft of the stepping motor 57B, the nut 57C moves relative to the screw shaft 57A. Here, since the nut 57C cannot move up and down with respect to the lower elevating plate 54, the screw shaft 57A moves up and down when the nut 57C rotates. For example, as shown in FIG. 5B, when the nut 57C is rotated, the screw shaft 57A is lowered, and the upper elevating plate 55 is lowered with respect to the lower elevating plate 54 as the screw shaft 57A moves. Moving. At this time, the upper elevating plate 55 is guided by the guide wire 51 and moves while sliding with respect to the guide wire 51.

As shown in FIG. 6, when the upper elevating plate 55 moves in a direction close to the lower elevating plate 54 as shown in FIG. 5B, the length of the arch member 58 is smaller than that of the upper elevating plate 55 as shown in FIG. The arch member 58 bends forward in a bow shape due to the excess between the elevating plates 54. As a result, the front surface of the arch member 58 presses the rear surface of the central portion 41 of the pressure receiving member 40 toward the front side, and the central portion 41 is deformed so as to project forward in a bow shape.

In this way, by rotating the stepping motor 57B in the forward and reverse directions, the amount of protrusion of the pressure receiving member 40 in the forward direction can be adjusted, and by rotating the stepping motor 56B in the forward and reverse directions, the pressure receiving member 40 protrudes. The vertical position of the part can be adjusted. As a result, the lumbar region of the seated person can be suitably supported.

As shown in FIG. 7, the vehicle seat S further includes a radio wave sensor 100. The radio wave sensor 100 is a sensor that detects the reflected wave of the radio wave radiated toward the seated person and acquires information about the seated person. The information about the seated person is, for example, information indicating the heart rate, pulse rate, pulse size, respiratory rate, breathing size, etc. of the seated person. In other words, the radio wave sensor 100 is a sensor that detects at least one of the heartbeat and the respiration of the seated person.

The radio wave sensor 100 has a sensor unit 110 for acquiring information about a seated person and a case 120 for accommodating the sensor unit 110. The sensor unit 110 has an irradiation unit 111 that irradiates the seated person with radio waves, and a detection unit 112 that detects the reflected wave of the radio waves reflected on the skin surface of the seated person. As the radio wave sensor 100, for example, a microwave Doppler sensor or the like can be used.

The radio wave sensor 100 is provided on the seat back S2 in the same manner as the pressure receiving member 40 and the support member 50. In the first embodiment, the radio wave sensor 100 is attached to the pressure receiving member 40. Specifically, the radio wave sensor 100 is attached to the side portion 42 of the pressure receiving member 40.

The side portions 42 extend diagonally forward from the left and right ends of the central portion 41 so as to be located on the front side toward the outside in the left-right direction. As shown in FIGS. 3 and 4, the side portion 42 has five upper first side portions 42A having a narrow plate shape and four narrow widths arranged below the first side portion 42A. Includes a second side portion 42B having a shape in which the tips of the plate-shaped portions of the above are connected to each other.

Specifically, the first side portion 42A has a plate shape in which the length in the vertical direction is smaller than the length in the horizontal direction. Further, the second side portion 42B is a plate-shaped portion 42C whose length in the vertical direction is smaller than the length in the horizontal direction, and a plurality of, specifically, four plates arranged at intervals in the vertical direction. It has a connecting portion 42C that connects the tips of the four plate-shaped portions 42C and a connecting portion 42D that extends in the vertical direction. The second side portion 42B is arranged below the pressure receiving member 40.

The radio wave sensor 100 is attached to the second side portion 42B on the right side of the side portions 42. More specifically, the radio wave sensor 100 is attached to the rear surface of the second side portion 42B on the right side. Specifically, the radio wave sensor 100 is arranged on the rear side of the second side portion 42B, and the case 120 is fixed to the second side portion 42B by a plurality of screws 92 (see FIG. 7), whereby the second side It is attached to the rear surface of the portion 42B.

As shown in FIG. 4, the radio wave sensor 100 is arranged at the lower part of the pressure receiving member 40 by being attached to the second side portion 42B arranged at the lower part of the pressure receiving member 40. Further, the radio wave sensor 100 is arranged so as to straddle the plurality of plate-shaped portions 42C in the vertical direction. Specifically, the radio wave sensor 100 is arranged so as to straddle the two upper plate-shaped portions 42C in the vertical direction.

Further, the radio wave sensor 100 is arranged at a position that does not overlap with the support member 50 when viewed from the rear side. In other words, the radio wave sensor 100 is arranged at a position different from that of the support member 50 when viewed from the rear side. Specifically, the radio wave sensor 100 is arranged at a position shifted to the left and right, specifically, to the right with respect to the lower elevating plate 54 of the support member 50. The position where the radio wave sensor 100 is arranged is a position where the support member 50 is not pressed by the arch member 58.

According to the first embodiment described above, since the radio wave sensor 100 is attached to the side portion 42 of the pressure receiving member 40, the radio wave sensor 100 is arranged without interfering with the operation of the support member 50 and the pressure receiving member 40. can do.

Further, since the radio wave sensor 100 is attached to the rear surface of the side portion 42, the seated person feels a hit from the radio wave sensor 100 via the seat back pad P2 when sitting on the vehicle seat S. It can be suppressed.

Further, since the side portions 42 extend diagonally forward from the left and right ends of the central portion 41 to the left and right outside, the radio wave sensor 100 can be easily arranged toward the seated person. By arranging the radio wave sensor 100 toward the seated person, the detection accuracy of the radio wave sensor 100 can be improved.

Further, since the first side portion 42A has a narrow plate shape, the amount of bending of the side portion 42 of the pressure receiving member 40 can be secured by the first side portion 42A. Further, since the second side portion 42B has a shape in which the tips of the plurality of narrow plate-shaped portions 42C are connected to each other, the rigidity of the second side portion 42B to which the radio wave sensor 100 is attached can be improved. , The mounting rigidity of the radio wave sensor 100 can be improved. That is, according to the first embodiment, it is possible to secure the amount of bending of the side portion 42 of the pressure receiving member 40 and improve the mounting rigidity of the radio wave sensor 100 at the same time.

Further, since the second side portion 42B is arranged below the pressure receiving member 40, the seated person feels a hit from the second side portion 42B to which the radio wave sensor 100 is attached as the support member 50 and the pressure receiving member 40 operate. Can be suppressed from feeling.

Further, since the radio wave sensor 100 is arranged so as to straddle the plurality of plate-shaped portions 42C of the side portion 42 (second side portion 42B), the radio wave is irradiated from between the plate-shaped portions 42C and the radio wave is reflected. Waves can be detected through between the plate-shaped portions 42C. As a result, the radio wave sensor 100 can satisfactorily irradiate and detect radio waves.

The radio wave sensor 100 may be attached not to the second side portion 42B on the right side but to the second side portion 42B on the left side as shown by a virtual line in FIG.

Further, the radio wave sensor 100 may be attached to the first side portion 42A instead of the second side portion 42B. Further, when the radio wave sensor 100 is attached to the first side portion 42A, the radio wave sensor 100 may be arranged so as to straddle a plurality of first side portions 42A in the vertical direction. In this case, the plurality of first side portions 42A correspond to "plurality of plate-shaped portions".

Further, for example, the radio wave sensor 100 may be attached to the front surface of the side portion 42 instead of the rear surface of the side portion 42 as long as it is small and does not give a feeling of hitting.

Next, the second embodiment will be described. In the following, the same points as those described above will be omitted as appropriate, for example, by assigning the same reference numerals to the drawings, and the points different from the previously described forms will be described in detail.

As shown in FIG. 8, in the second embodiment, the radio wave sensor 100 is attached to the support member 50. Specifically, the radio wave sensor 100 is attached to the lower elevating plate 54 of the support member 50. More specifically, the radio wave sensor 100 is attached to the rear surface of the lower elevating plate 54. Specifically, the radio wave sensor 100 is arranged behind the lower elevating plate 54, and the case 120 is fixed to the lower elevating plate 54 by a plurality of screws (not shown), so that the case 120 is rearward of the lower elevating plate 54. It is attached to the side surface.

The radio wave sensor 100 is arranged at a position avoiding the screw shafts 56A and 57A and the stepping motors 56B and 57B. Specifically, the radio wave sensor 100 is arranged at positions shifted left and right with respect to the screw shafts 56A and 57A and vertically displaced with respect to the stepping motors 56B and 57B. In the second embodiment, the radio wave sensor 100 is located on the right side of the screw shaft 56A and above the stepping motor 56B. The position where the radio wave sensor 100 is arranged is a position where it is not sandwiched between the pressure receiving member 40 and the support member 50, and is a position where it is not sandwiched between the lower elevating plate 54 and the upper elevating plate 55.

As shown in FIG. 9A, the vehicle seat S of the second embodiment further 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 has a control device 71 and an actuator 72.

The actuator 72 includes, for example, a stepping motor and a gear mechanism (not shown) and a swing shaft 72C.
The stepping motor is an electric motor capable of forward / reverse rotation in which the output shaft is rotated by the control device 71.
The gear mechanism has a plurality of gears, decelerates the driving force from the stepping motor, and transmits the driving force to the swing shaft 72C.
The swing shaft 72C is arranged along the left-right direction. As shown in FIGS. 9 (b) and 9 (c), the sensor unit 110 of the radio wave sensor 100 is fixed to the swing shaft 72C and is supported so as to swing up and down with respect to the case 120.

The control device 71 drives the actuator 72 to control the orientation of the sensor unit 110 of the radio wave sensor 100. Specifically, the control device 71 detects the position of the radio wave sensor 100 in the vertical direction, drives the actuator 72, and controls the direction of the sensor unit 110. The control device 71 detects the position of the radio wave sensor 100 in the vertical direction from the operation history of the stepping motor 56B that drives the screw shaft 56A of the support unit elevating mechanism 56.

Here, an example of the operation of the sensor orientation changing mechanism 70 will be described.
As shown in FIG. 9B, when the lower elevating plate 54 is lowered, the control device 71 drives the actuator 72 to direct the sensor unit 110 of the radio wave sensor 100 toward the back of the seated person. Specifically, when the lower elevating plate 54 is lowered and the radio wave sensor 100 is moved downward, the control device 71 drives the actuator 72 to swing the swing shaft 72C in the counterclockwise direction shown in the figure. The sensor unit 110 is directed diagonally upward and forward.

Further, as shown in FIG. 9C, when the lower elevating plate 54 is raised, the control device 71 drives the actuator 72 to direct the sensor unit 110 of the radio wave sensor 100 toward the back of the seated person. Specifically, when the lower elevating 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 in the clockwise direction shown in the figure, and the sensor Turn the unit 110 forward.

By driving the actuator 72 in this way, the direction of the radio wave sensor 100 (sensor unit 110) can be changed so as to face the back of the seated person according to the vertical position of the radio wave sensor 100. As a result, the radio wave sensor 100 can suitably acquire information about the seated person.

According to the second embodiment described above, since the radio wave sensor 100 is attached to the rear surface of the lower elevating plate 54, the radio wave sensor 100 does not interfere with the operation of the support member 50 and the pressure receiving member 40. Can be arranged.

Further, since the sensor orientation changing mechanism 70 is provided, the radio wave sensor 100 can be oriented in a suitable direction regardless of the position of the radio wave sensor 100 in the vertical direction, and the detection accuracy of the radio wave sensor 100 can be improved.

As shown in FIG. 10, the radio wave sensor 100 may be attached to the upper elevating plate 55 instead of the lower elevating plate 54. Specifically, the radio wave sensor 100 may be attached to the rear surface of the upper elevating plate 55. Also with this, the radio wave sensor 100 can be arranged without interfering with the operation of the support member 50 and the pressure receiving member 40.

Further, for example, even if the position of the radio wave sensor 100 in the vertical direction changes, if the influence on the detection accuracy is small, the configuration may not include the sensor orientation changing mechanism.

Although the embodiments have been described above, the present invention is not limited to the above embodiments, and can be appropriately modified and implemented as illustrated below.

For example, in the above embodiment, the side portion 42 of the pressure receiving member 40 has a plurality of narrow plate-shaped portions, but the present invention is not limited to this. For example, the side portion may be shaped such that all the tips of the narrow plate-shaped portions are connected to each other. Further, the side portion may have a shape such that not only the tip of the narrow plate-shaped portion but also the whole is connected to each other. Further, the side portion may be configured to extend from only a part of the left and right ends of the central portion, for example, the upper part of the left and right ends of the central portion toward the left and right outside. Further, the side portion may not extend diagonally forward on the left and right outer sides, but may simply extend toward the left and right outer sides. Further, when the radio wave sensor is attached to the support member, the pressure receiving member may be configured not to have a side portion.

Further, in the above embodiment, the pressure receiving member 40, the support member 50 and the radio wave sensor 100 are provided on the seat back S2, but the present invention is not limited to this, and the pressure receiving member, the support member and the radio wave sensor are provided on the seat cushion S1. It may have been. For example, the seat cushion S1 may be provided with a pressure receiving member, a support member, and a radio wave sensor instead of the mat member 25 (see FIG. 2). When a support member or the like is provided on the seat cushion S1, the upper side corresponds to the "seat side" and the lower side corresponds to the "opposite side to the seater side". Further, in this case, the second plate-shaped member of the support member moves in the front-rear direction, and the front-rear direction corresponds to the "orthogonal direction orthogonal to the left-right direction". Further, the pressure receiving member, the support member, and the radio wave sensor may be provided on both the seat cushion S1 and the seat back S2, respectively.

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

Further, each element described in the above-described embodiment and modification may be implemented in any combination.

40 Pressure receiving member 41 Central part 42 Side part 42A 1st side part 42B 2nd side part 42C Plate shape part 42D Connecting part 50 Support member 54 Lower elevating plate 55 Upper elevating plate 58 Arch member 100 Radio wave sensor S Vehicle seat S1 Cushion S2 seat back

Claims (10)

A vehicle seat with a seat cushion and seat back,
A plate-shaped pressure receiving member that receives the load from the seated person,
A support member that supports the pressure receiving member from the side opposite to the seated side, and a support member that changes the shape of the pressure receiving member.
It is equipped with a radio wave sensor that detects the reflected wave of the radio wave radiated toward the seated person and acquires information about the seated person.
The support member is
The first plate-shaped member and
A second plate-shaped member that is orthogonal to the left-right direction and moves in a direction closer to or away from the first plate-shaped member.
One end is fixed to the first plate-shaped member, and the other end is a flexible and deformable arch member fixed to the second plate-shaped member, and the second plate-shaped member is close to the first plate-shaped member. It has an arch member that bends toward the occupant side and presses the pressure receiving member toward the occupant side when moving in the direction of the occupant.
The pressure receiving member is
A central portion located in the center in the left-right direction, which is pressed by the arch member, and a central portion.
It has left and right side portions arranged on both left and right sides of the central portion.
The radio wave sensor is a vehicle seat characterized in that it is attached to the side portion. The vehicle seat according to claim 1, wherein the radio wave sensor is attached to a surface of the side portion opposite to the seated side. The vehicle seat according to claim 1 or 2, wherein the side portions extend from the left and right ends of the central portion so as to be located on the seated side toward the outside in the left-right direction. The side part
The first side portion having a plate shape whose length in the orthogonal direction is smaller than the length in the left-right direction,
A plate-shaped portion whose length in the orthogonal direction is smaller than the length in the left-right direction, and a plurality of plate-shaped portions arranged at intervals in the orthogonal direction are connected to the tips of the plurality of plate-shaped portions. Including a second side portion having a connecting portion and
The vehicle seat according to any one of claims 1 to 3, wherein the radio wave sensor is attached to the second side portion. The pressure receiving member, the support member, and the radio wave sensor are provided on the seat back.
The vehicle seat according to claim 4, wherein the second side portion is arranged below the pressure receiving member. The side portion is a plate-shaped portion whose length in the orthogonal direction is smaller than the length in the left-right direction, and has a plurality of plate-shaped portions arranged at intervals in the orthogonal direction.
The vehicle seat according to claim 2, wherein the radio wave sensor is arranged so as to straddle the plurality of plate-shaped portions in the orthogonal direction. A vehicle seat with a seat cushion and seat back,
A plate-shaped pressure receiving member that receives the load from the seated person,
A support member that supports the pressure receiving member from the side opposite to the seated side, and a support member that changes the shape of the pressure receiving member.
It is equipped with a radio wave sensor that detects the reflected wave of the radio wave radiated toward the seated person and acquires information about the seated person.
The support member is
The first plate-shaped member and
A second plate-shaped member that is orthogonal to the left-right direction and moves in a direction closer to or away from the first plate-shaped member.
One end is fixed to the first plate-shaped member, and the other end is a flexible and deformable arch member fixed to the second plate-shaped member, and the second plate-shaped member is close to the first plate-shaped member. It has an arch member that bends toward the occupant side and presses the pressure receiving member toward the occupant side when moving in the direction of the occupant.
The radio wave sensor is a vehicle seat characterized in that it is attached to a surface of the first plate-shaped member or the second plate-shaped member opposite to the seated side. The vehicle seat according to claim 7, further comprising a sensor orientation changing mechanism that changes the orientation of the radio wave sensor according to the position of the radio wave sensor in the orthogonal direction. The vehicle seat according to any one of claims 1 to 8, wherein the pressure receiving member, the support member, and the radio wave sensor are provided on the seat back. The vehicle seat according to any one of claims 1 to 9, wherein the radio wave sensor is a sensor that detects at least one of a seated person's heartbeat and respiration.

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