WO2015002076A1

WO2015002076A1 - Vehicle seat

Info

Publication number: WO2015002076A1
Application number: PCT/JP2014/067116
Authority: WO
Inventors: 健介溝井; 創大野
Original assignee: テイ・エステック株式会社
Priority date: 2013-07-02
Filing date: 2014-06-27
Publication date: 2015-01-08
Also published as: JP2015009751A; JP5905413B2

Abstract

This vehicle seat is equipped with a seat frame (F) and a plurality of spring members (21) attached to the seat frame (F). The vehicle seat is further equipped with a resinous connecting member (30D) for connecting the plurality of spring members (21), and a flexible passenger detection sensor (40) attached to the connecting member (30D). The passenger detection sensor (40) is configured so as to detect the presence of a passenger, when the passenger sits in the vehicle seat, by being sandwiched between the connecting member (30D) and a cushion member.

Description

Vehicle seat

The present invention relates to a vehicle seat including an occupant detection sensor that detects the presence or absence of an occupant.

In recent years, some automobile seats are equipped with an occupant detection sensor that detects whether an occupant is sitting or not. These occupant detection sensors are used to detect the presence or absence of an occupant in order to operate a seat belt reminder or an occupant restraint device, and are often provided between a cushion member made of urethane foam and the skin. ing.

By the way, when the occupant detection sensor is provided between the cushion member and the skin, it is necessary to review the occupant detection sensor or the installation method according to the seat so that the occupant detection sensor functions correctly. Therefore, in order to omit this review, it has been proposed to attach a sensor unit for detecting an occupant to a seat spring provided under the cushion member (Patent Document 1). This sensor unit has a structure in which a film type pressure sensor is built in a thin case-like base plate.

International Publication No. 2013/030009

However, the sensor unit of Patent Document 1 requires a base plate, which is expensive and has a problem that the structure is complicated.

Therefore, an object of the present invention is to provide a vehicle seat that can detect the presence or absence of an occupant with a simple structure. Another object of the present invention is to provide a vehicle seat that has a simple structure, ensures the accuracy of detection of an occupant, and is easy to mount a sensor.

In order to achieve the above-described object, a vehicle seat according to the present invention includes a seat frame, a plurality of spring members installed on the seat frame, and a cushion member disposed on the occupant side of the plurality of spring members. A vehicle seat comprising: a resin coupling member that couples the plurality of spring members; and a flexible occupant detection sensor attached to the coupling member, wherein the occupant sits on the vehicle seat In addition, the occupant detection sensor is configured to detect the presence or absence of an occupant by being sandwiched between the connecting member and the cushion member.

According to such a configuration, it is possible to detect the presence or absence of an occupant by sandwiching the flexible occupant detection sensor between the connecting member and the cushion member. Therefore, the base plate as in the prior art is unnecessary, the structure can be simplified, and the cost can be reduced.

In the vehicle seat described above, the occupant detection sensor has a base and a detection part extending from the base, and the connecting member has a first portion where the base is disposed on a surface on the occupant side, It is desirable that a second part facing the detection unit is provided, the first part protrudes closer to the cushion member than the second part, and the second part is separated from the cushion member.

According to such a configuration, since the second portion where the detection unit is disposed is separated from the cushion member, it is not detected that the passenger is present only by applying a small load to the cushion member, and the presence or absence of the passenger is accurately detected. Can be detected.

In the above vehicle seat, the occupant detection sensor has a base and a detection part extending from the base, and the connecting member has a planar shape in which the occupant detection sensor is attached to a surface on the occupant side. The sensor member is provided, and the cushion member is provided with a third part facing the base part and a fourth part facing the detection part, and the third part is more than the fourth part. It is desirable that the sensor protrudes toward the sensor installation part, and the fourth part is separated from the sensor installation part.

According to this configuration, since the fourth portion facing the detection unit is separated from the sensor installation unit, it is not detected that there is an occupant just by applying a small load to the cushion member, and the presence or absence of the occupant is accurately detected. can do.

In each of the vehicle seats described above, the connecting member is preferably formed so as to be integrated with the spring member.

According to this configuration, since the connecting member is integrated with the spring member, the posture of the connecting member is stable, and the sensitivity when the occupant detection sensor is sandwiched between the connecting member and the cushion member is stable. To do.

In each of the above vehicle seats, each of the plurality of spring members is a spring bent in a zigzag, and has a plurality of U-shaped portions that open in one direction by bending, and the plurality of spring members are A first spring member and a second spring member disposed adjacent to the first spring member, wherein an opening of the U-shaped portion of the first spring member and the second spring member It arrange | positions so that the opening of a U-shaped part may oppose, and it is set as the structure by which the said passenger | crew detection sensor is attached to the said connection member which connects the bottom parts of two U-shaped parts which the said opening opposes. be able to.

In such a configuration, the openings of the two U-shaped portions are opposed to each other, and the connecting member that connects the bottom portions of the two U-shaped portions is relatively long. Therefore, the installation surface of the occupant detection sensor can be increased, and the occupant detection sensor can be easily attached.

In the vehicle seat described above, it is desirable that the detection unit is disposed at a position shifted from the center in the left-right direction of the seat cushion.

According to such a configuration, since the load from the occupant's buttocks or thighs is firmly applied to the cushion member on the detection unit, the presence or absence of the occupant can be accurately detected.

In each of the vehicle seats described above, the occupant detection sensor can be a sensor whose output signal switches between ON and OFF depending on the presence or absence of the occupant.

In this way, the presence or absence of an occupant can be detected accurately and at low cost by using a sensor that switches the signal output between ON and OFF depending on the presence or absence of an occupant, rather than a sensor that outputs a value of a load applied to the sensor. .

In the vehicle seat described above, it is desirable that the portion of the connecting member to which the occupant detection sensor is attached is disposed closer to the occupant side than the plurality of spring members.

According to such a configuration, since the part to which the occupant detection sensor is attached is arranged on the occupant side with respect to the plurality of spring members, the occupant detection sensor can reliably detect the load of the occupant, and when detecting the occupant The sensitivity of is stable.

In the vehicle seat, wherein the plurality of spring members are springs bent in a zigzag manner, the connecting member has a width in a direction perpendicular to a direction connecting the bottoms of the two U-shaped portions, and the width is It is desirable that the width is smaller than the inner width of each U-shaped part to which the connecting member is connected.
Furthermore, the vehicle seat having such a configuration further includes a cable that connects the occupant detection sensor and the control device, and the cable extends from the occupant side of the spring member to the opposite side of the occupant of the spring member. It is desirable to extend through a gap between the connecting member and the spring member.

According to such a configuration, the width of the connecting member to which the occupant detection sensor is attached is smaller than the inner width of the U-shaped portion of the first spring member and the second spring member, thereby reducing the weight of the connecting member. Can be achieved.
Since the cable connecting the occupant detection sensor and the control device extends from the occupant side of the spring member to the opposite side of the occupant of the spring member through the gap between the connecting member and the spring member, the cable is In the case where it is arranged closer to the passenger than the spring member, it is possible to prevent problems such as the cable being disconnected between the cushion member and the spring member.

In the vehicle seat described above, it is preferable that the connecting member connects four spring members.

According to such a configuration, the occupant load can be reliably detected by the occupant detection sensor, and the sensitivity when detecting the occupant is stabilized.

In the vehicle seat, wherein the plurality of spring members are springs bent in a zigzag manner, the plurality of spring members are respectively disposed on both sides of the first spring member and the second spring member. And the fourth spring member, the third spring member is disposed adjacent to the first spring member, and the plurality of U-shaped portions are disposed in the same direction as the second spring member. The fourth spring member is disposed adjacent to the second spring member, the plurality of U-shaped portions are disposed in the same direction as the first spring member, and the connecting member is The bottom part of the U-shaped part in the first spring member is connected to the bottom part of the U-shaped part in the third spring member, and the bottom part of the U-shaped part in the second spring member and the fourth part Connecting the bottom of the U-shaped part of the spring member It is desirable

According to such a configuration, since the connecting member connects the four spring members, the occupant load can be reliably detected by the occupant detection sensor, and the sensitivity when detecting the occupant is stabilized.

1 is an overall perspective view of a vehicle seat. It is a perspective view of a seat frame. It is a top view of the seat spring which installed the occupant detection sensor. (A) An expansion perspective view of a crew member detection sensor, and (b) A side view of a crew member detection sensor. FIG. 4 is a cross-sectional view of the vehicle seat corresponding to the ZZ cross section of FIG. 3. FIG. 6 is a view corresponding to FIG. 5 showing a state when the occupant sits on the vehicle seat. FIG. 4 is a cross-sectional view corresponding to a ZZ cross section of FIG. 3 of a vehicle seat according to a modified example. FIG. 8 is a view corresponding to FIG. 7 showing a state when an occupant sits on a vehicle seat in a modified example. It is (a) sectional drawing of the vehicle seat at the time of employ | adopting the passenger | crew detection sensor which has two detection parts, (b) The top view of a seat spring. It is a top view of a seat spring at the time of arranging two crew member detection sensors.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. As shown in FIG. 1, a vehicle seat S as an example of a vehicle seat includes a seat cushion S1, a seat back S2 supported by the seat cushion S1, and a headrest S3 supported by the seat back S2. It is configured. In the following description, front and rear, left and right, and top and bottom are used with reference to an occupant sitting on the vehicle seat S.

In the vehicle seat S, a seat frame F as shown in FIG. 2 is incorporated. The seat frame F includes a cushion frame F1 constituting the seat cushion S1 and a seat back frame F2 constituting the seat back S2. Then, as exemplified by the seat cushion S1 in FIG. 5, the seat frame F is covered with a cushion member 51 made of urethane foam, and the skin 52 is further covered with the cushion member 51, whereby the vehicle seat S is configured. Has been.

Returning to FIG. 2, the cushion frame F 1 that is a part of the seat frame F is connected to a pair of side frames 11 that extend long in the front and rear direction and spaced apart from each other and the front ends of the pair of side frames 11. A pan frame 12 made of sheet metal and a connecting pipe 13 made of a metal pipe that connects the rear ends of the pair of side frames 11 are formed in a frame shape in plan view.

A seat spring 20 is installed between the pan frame 12 and the connecting pipe 13 of the cushion frame F1.
As shown in FIG. 3, the seat spring 20 is elongated in the front-rear direction and has four spring members 21 (21A to 21D) arranged side by side, and resin connection members 30A to 30D that connect the spring members 21 to each other. It is comprised by.
Each spring member 21 is formed by bending a metal wire, and a hook portion 22 for hooking the connecting pipe 13 is formed at the rear end (see FIG. 2). The spring member 21 extends forward from the hook portion 22 and zigzags right and left. It is bent. Due to this bending, a plurality of U-shaped portions 23 opened to the left and right are continuously formed.

In this embodiment, as an example, each spring member 21 is bent four times to the left and right. The adjacent spring members 21 are bent so as to be bilaterally symmetric in plan view. Therefore, the openings 23A of the U-shaped portions 23 adjacent to the left and right are opposed to the left and right, and the bottom 23B. They are also facing each other. The front end of each spring member 21 extends to the left and right, and the portion extending to the left and right is hooked on a hook 12A (see FIG. 2) provided at the rear end of the pan frame 12 and supported by the pan frame 12. Yes.

The four spring members 21A to 21D (the first spring member 21B, the second spring member 21C, the third spring member 21A, and the fourth spring member 21D) are connected to the connecting member 30A at four locations separated from each other in the front-rear direction. It is connected by 30D. Each of the connecting members 30A to 30D is formed integrally with the spring members 21A to 21D by insert molding. Therefore, each of the connecting members 30A to 30D is firmly bonded to the spring member 21, and the posture with respect to the spring member 21 is fixed.
The four spring members 21A to 21D have adjacent U-shaped portions 23 arranged side by side in the left-right direction, and the inner width IW of each U-shaped portion 23 has a constant dimension.

Specifically, the connecting member 30A arranged at the back is formed so as to connect the bottom portions 23B of the U-shaped portion 23 at the rearmost of the four spring members 21A to 21D.
Then, the connecting member 30B arranged second from the back connects the adjacent bottom parts 23B of the second U-shaped part 23 from the rear of the two

spring members

21B, 21C arranged in the center. Is formed.
Further, the connecting member 30C arranged third from the back also has a bottom portion adjacent to the fourth U-shaped portion 23 arranged behind the two

spring members

21B, 21C arranged at the center, similarly to the connecting member 30B. 23B is formed so as to connect each other.

Further, the connecting member 30D arranged at the foremost side is formed so as to connect the bottom parts 23B of the U-shaped part 23 second from the front of the four spring members 21A to 21D. An occupant detection sensor 40 is attached to the foremost connecting member 30D. Explaining the shape of the spring member 21 connected to the connecting member 30D, the opening 23A of the second U-shaped portion 23 from the front in the second spring member 21B (first spring member) from the right opens leftward, The opening 23A of the second U-shaped portion 23 from the front in the third spring member 21C (second spring member) from the right opens to the right, and these openings 23A are arranged to face each other. Therefore, a portion of the connecting member 30D that connects the bottom portion 23B of the U-shaped portion 23 of the spring member 21B and the bottom portion 23B of the U-shaped portion 23 of the spring member 21C is formed to be long from side to side, and occupant detection A size sufficient to arrange the sensor 40 is secured.
The lateral width WT of the connecting member 30D (the width in the direction orthogonal to the direction in which the bottom portions 23B of the two U-shaped portions 23 are connected to each other) is smaller than the inner width IW of the U-shaped portion 23.

Here, the occupant detection sensor 40 will be described with reference to FIGS. The occupant detection sensor 40 shown in FIG. 4A is a flexible member formed by stacking a plurality of plastic films (not shown) on which pressure-sensitive electrodes 42A and wirings 43 are printed. The occupant detection sensor 40 includes a base 41 that is a portion attached to the connecting member 30 D, and a detection unit 42 that extends from the base 41. As shown in FIG. 4B, the detection unit 42 is provided with the above-described pressure-sensitive electrode 42A, and the lower surface of the occupant detection sensor 40 (the surface facing the connecting member 30D). The elastic member 42B made of foaming resin or the like is attached in correspondence with the position of the electrode 42A. The elastic member 42B is provided to concentrate pressure on the electrode 42A when the detection unit 42 is sandwiched between the coupling member 30D and the cushion member 51. The pressure-sensitive electrode 42A outputs an OFF signal from the wiring 43 when no pressure is applied, and outputs an ON signal from the wiring 43 when a predetermined pressure or more is applied from the outside. A cable 44 for connecting to a control device (not shown) is drawn out from the wiring 43. The cable 44 extends from the upper side (occupant side) to the lower side (opposite side of the occupant) of the spring member 21C through the gap between the coupling member 30D and the spring member 21C.
Since the occupant detection sensor 40 is a sensor whose output signal is switched between ON and OFF by an external pressure, the presence / absence of the occupant can be detected more accurately and at a lower cost than a sensor that outputs the value of a load applied from the outside. It can be detected.

As shown in FIG. 5, the connection member 30 D is provided with a first portion 31 where the base 41 of the occupant detection sensor 40 is disposed and a second portion 32 where the detection portion 42 faces adjacent to the first portion 31. The first part 31 protrudes closer to the cushion member 51 than the second part 32, and the second part 32 is separated from the planar lower surface 51 A of the cushion member 51 when the occupant is not sitting on the seat cushion S 1. is doing. In the present embodiment, the first part 31 is also slightly separated from the lower surface 51A of the cushion member 51 in a state where no occupant is sitting, but the first part 31 may be in contact with the lower surface 51A. . The base 41 is bonded to the first portion 31 with a double-sided tape or an adhesive.

The second portion 32 is separated from the lower surface 51A of the cushion member 51, so that a space is secured between the second portion 32 and the cushion member 51, and the detection unit 42 is disposed in this space. For this reason, since the detection part 42 is not pinched | interposed by the cushion member 51 and the connection member 30D in the state where the passenger | crew is not sitting, it does not apply a pressure and is the OFF state which does not energize.

The part where the occupant detection sensor 40 is provided is desirably a position corresponding to the occupant's buttocks, and more desirably a position corresponding to the thigh. For example, in the connection member 30D provided with the occupant detection sensor 40 in the present embodiment, the detection unit 42 is slightly shifted from the center in the left-right direction of the cushion frame F1 (seat cushion S1) to the right as can be seen with reference to FIG. It is displaced and provided at a position corresponding to the thigh of the occupant. In this way, by placing the detection unit 42 at a position slightly shifted left and right from the center in the left-right direction, the load from the occupant's buttocks or thighs is firmly applied to the cushion member 51 on the detection unit 42. Presence / absence can be detected accurately.

In the vehicle seat S configured as described above, when the occupant sits, the cushion member 51 is pushed down by the occupant's thigh 60 and the lower surface 51A of the cushion member 51 is detected by the occupant as shown in FIG. The detection unit 42 of the sensor 40 is pressed downward. Thereby, the detection part 42 is clamped by the connecting member 30D and the cushion member 51, and the occupant detection sensor 40 is in an ON state in which power is supplied, and it can be detected that there is an occupant.

Thus, according to the vehicle seat S of the present embodiment, the presence or absence of an occupant is detected by sandwiching the detection portion 42 of the flexible occupant detection sensor 40 between the connecting member 30D and the cushion member 51. Is possible. And according to the attachment aspect of the passenger | crew detection sensor 40 in the vehicle seat S of this embodiment, a baseplate like a prior art is unnecessary, a structure can be simplified and cost reduction can be achieved. .

In addition, when the occupant detection sensor 40 is disposed between the skin 52 and the cushion member 51, there is a limitation in the placement location, such as the vicinity of the portion where the skin 52 is suspended from the cushion member 51 must be avoided. When the occupant detection sensor 40 is provided between the cushion member 51 and the connecting member 30 as in the present embodiment, the degree of freedom in arrangement increases.

And since the 2nd site | part 32 in which the detection part 42 of the passenger | crew detection sensor 40 is arrange | positioned is spaced apart from the cushion member 51, it will not be detected that a passenger | crew is present only by applying a small load to the cushion member 51, but it is accurate. The presence or absence of a passenger can be detected.

Further, since the connecting member 30D of the vehicle seat S is formed so as to be integrated with the spring member 21, the posture of the connecting member 30D is stabilized, and the occupant detection sensor 40 is sandwiched between the connecting member 30D and the cushion member 51. This stabilizes the sensitivity when detecting an occupant.

Further, the occupant detection sensor 40 is attached to a connecting member 30D that connects the bottoms 23B of the two U-shaped portions 23 with the openings 23A of the two U-shaped portions 23 facing each other. The installation surface of the occupant detection sensor 40 can be easily installed.

In addition, since the occupant detection sensor 40 is disposed at a position corresponding to the occupant's thigh 60, the load from the occupant's thigh 60 is firmly applied to the cushion member 51, and the occupant detection sensor 40 is turned on. Therefore, the presence or absence of a passenger can be accurately detected.

Further, as shown in FIG. 5, the first portion 31 of the connecting member 30D where the base 41 of the occupant detection sensor 40 is disposed is disposed above (on the occupant side) the spring members 21A to 21D. Can be reliably detected by the occupant detection sensor 40, and the sensitivity when detecting the occupant is stabilized.

Also, as shown in FIG. 3, since the lateral width WT of the connecting member 30D is smaller than the inner width IW of each U-shaped portion 23 of the spring members 21A to 21D, the weight of the connecting member 30D can be reduced.

Further, as shown in FIG. 3, the cable 44 that connects the occupant detection sensor 40 and the control device passes from the upper side to the lower side of the spring member 21C through the gap between the connecting member 30D and the spring member 21C. Therefore, when the cable 44 is disposed above the spring member 21C, it is possible to prevent problems such as the cable 44 being disconnected between the cushion member 51 and the spring member 21C.

Further, since the connecting member 30D connects the four spring members 21A to 21D, the passenger's load can be reliably detected by the passenger detection sensor 40, and the sensitivity when detecting the passenger is stabilized.
Specifically, as shown in FIG. 3, in the four spring members 21A to 21D, the bottom portions 23B of the U-shaped portions 23 are connected to each other by the connecting member 30D, so that the load of the occupant can be reliably ensured. It can detect with the passenger | crew detection sensor 40, and the sensitivity when detecting a passenger | crew is stabilized.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately modified and implemented.
For example, in the above-described embodiment, the lower surface 51A of the cushion member 51 is planar and the step is provided on the upper surface of the coupling member 30D. However, the upper surface of the coupling member 30D is planar and the lower surface 51A of the cushion member 51 is A step may be provided. For example, as in the modification shown in FIG. 7, the upper surface of the connecting member 30 D is a planar sensor installation portion 35, and the lower surface 51 A of the cushion member 51 is configured with the third portion 53 facing the base 41 and the detection portion A fourth portion 54 facing 42 may be provided. Here, the third part 53 protrudes closer to the sensor installation part 35 than the fourth part 54, and the fourth part 54 is separated from the sensor installation part 35 in a state where no occupant is sitting, and the detection part 42. It is away from.

Even in the vehicle seat having such a configuration, when the occupant is not sitting or only a small load is applied to the seat cushion S1, the detection unit 42 is located between the third portion 53 of the cushion member 51 and the connecting member 30D. It can be turned off without being pinched. And if a passenger | crew sits down, as shown in FIG. 8, the cushion part 51 will bend, and the 3rd site | part 53 and the connection member 30D can clamp the detection part 42, and can be made into an ON state. That is, it is not detected that there is an occupant just by applying a small load to the cushion member 51, and the presence or absence of the occupant can be detected accurately.

Further, as shown in FIGS. 9A and 9B, the occupant detection sensor 140 may be configured to have two detection units 142. In this case, the center base 141 of the occupant detection sensor 140 is disposed in the first portion 31 in the center of the connecting member 30, and the two detection portions 142 are disposed facing the second portions 32 on both sides of the first portion 31. Good.

Further, in the case where two detection units are arranged in this way, as shown in FIG. 10, separate occupant detection sensors 240 having one detection unit 242 may be arranged separately. In this case, when each base 241 of each occupant detection sensor 240 is arranged in the first part 31, and each detection part 242 is arranged facing each of the left and right second parts 32 as in the case of FIG. 9B. Good.

As described above, when the

occupant detection sensors

140 and 240 including the plurality of

detection units

142 and 242 are employed, even if a malfunction such as a contact failure occurs in some of the

detection units

142 and 242, the other detection units 142. , 242 can be used to determine the presence or absence of an occupant.

The shape and arrangement of the spring member 21 of the seat spring 20 described above is an example, and the U-shaped portion 23 may be bent in an arc shape instead of being bent at a right angle as shown in FIG. Further, the positional relationship between the U-shaped portions is not limited to the form shown in FIG. Similarly, the arrangement of the plurality of connecting members is not limited to the form shown in FIG. 3 and is not particularly limited as long as the spring members are connected to each other. Further, the spring member may be installed on the left and right instead of being installed on the front and rear.

In the embodiment, the example in which the occupant detection sensor 40 is provided in the connecting member 30D of the seat spring 20 of the seat cushion S1 has been described. However, the seat back S2 is provided with a seat spring, and the spring member constituting the seat spring is connected. The occupant detection sensor may be attached to the connecting member.

In the above embodiment, a vehicle seat is illustrated as an example of a vehicle seat, but the vehicle seat may be a seat of another vehicle, for example, an aircraft or a ship.

Claims

A vehicle seat comprising a seat frame, a plurality of spring members installed on the seat frame, and a cushion member disposed on the passenger side of the plurality of spring members,
A resin connecting member that connects the plurality of spring members;
A flexible occupant detection sensor attached to the connecting member;
The vehicle occupant seat is configured to detect the presence or absence of an occupant by being sandwiched between the connecting member and the cushion member when the occupant sits on the vehicle seat. .
The occupant detection sensor has a base and a detection part extending from the base,
The connecting member is provided on the surface on the occupant side with a first portion where the base portion is disposed and a second portion where the detection portion faces,
2. The vehicle seat according to claim 1, wherein the first part protrudes toward the cushion member with respect to the second part, and the second part is separated from the cushion member.
The occupant detection sensor has a base and a detection part extending from the base,
The connecting member is provided with a planar sensor installation part in which the occupant detection sensor is attached to a surface on the occupant side,
The cushion member is provided with a third part facing the base and a fourth part facing the detection part, and the third part protrudes closer to the sensor installation part than the fourth part. The vehicle seat according to claim 1, wherein the fourth portion is separated from the sensor installation portion.
The vehicle seat according to any one of claims 1 to 3, wherein the connecting member is formed so as to be integrated with the spring member.
Each of the plurality of spring members is a spring formed by zigzag bending, and has a plurality of U-shaped portions that open in one direction by bending,
The plurality of spring members include a first spring member and a second spring member disposed adjacent to the first spring member, and an opening of the U-shaped portion of the first spring member; The occupant detection sensor is disposed on the connecting member that is disposed so as to face the opening of the U-shaped portion of the second spring member, and connects the bottom portions of the two U-shaped portions facing the opening. The vehicle seat according to any one of claims 1 to 4, wherein the vehicle seat is attached.
The vehicle seat according to any one of claims 2 to 5, wherein the detection unit is disposed at a position shifted from a center in a left-right direction of the seat cushion.
The vehicle seat according to any one of claims 1 to 6, wherein the occupant detection sensor is a sensor whose output signal is switched between ON and OFF depending on the presence or absence of an occupant.
The vehicle seat according to claim 1, wherein a portion of the connecting member to which the occupant detection sensor is attached is disposed closer to the occupant than the plurality of spring members.
The connecting member has a horizontal width in a direction orthogonal to a direction in which the bottoms of the two U-shaped portions are connected to each other, and the horizontal width is larger than an inner width of each U-shaped portion to which the connecting member is connected. The vehicle seat according to claim 5, wherein the vehicle seat is also small.
The cable further includes a cable connecting the occupant detection sensor and the control device, and the cable passes from the occupant side of the spring member to the side opposite to the occupant of the spring member through the gap between the coupling member and the spring member. The vehicle seat according to claim 9, wherein the vehicle seat extends.
The vehicle seat according to any one of claims 1 to 10, wherein the connecting member connects four spring members.
The plurality of spring members include a third spring member and a fourth spring member respectively disposed on both sides of the first spring member and the second spring member,
The third spring member is disposed adjacent to the first spring member, and the plurality of U-shaped portions are disposed in the same direction as the second spring member,
The fourth spring member is disposed adjacent to the second spring member, and the plurality of U-shaped portions are disposed in the same direction as the first spring member,
The connecting member connects the bottom of the U-shaped part of the first spring member and the bottom of the U-shaped part of the third spring member, and also connects the U-shaped part of the second spring member. The vehicle seat according to claim 5, wherein the bottom and the bottom of the U-shaped portion of the fourth spring member are connected.