JP7348542B2 - vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat that includes a pelvis support member that supports the pelvic region of an occupant .

In a seating device such as a vehicle seat, a movable body supports the part of the body of the occupant sitting on the seat where the pelvis is located, and by moving the movable body, the position of the pelvis (specifically, the position of the pelvis in the front-back direction) is supported by a movable body. It is already known to adjust the inclination angle (hereinafter also referred to as pelvis angle). To explain with an example, in the vehicle seat described in Patent Document 1, a Pelvis support is provided as the movable body. Moving this Pelvis support in the vertical direction changes the seating angle of the occupant's buttocks. Utilizing this movement, the vehicle seat described in Patent Document 1 can adjust the pelvic angle of the occupant to correct the occupant's sitting posture.

Japanese Patent Application Publication No. 8-126548

Incidentally, the vehicle seat described in Patent Document 1 is provided with an operating lever that can be operated by a passenger, and the Pelvis support moves in the vertical direction in response to the operation of this operating lever. That is, in the vehicle seat described in Patent Document 1, the amount of movement of the pelvic support, that is, the amount of adjustment of the pelvic angle, is determined according to the amount of operation of the operating lever by the occupant. Therefore, in the vehicle seat described in Patent Document 1, since the amount of adjustment of the pelvis angle can be set arbitrarily, the effect of adjusting the pelvis angle by the Pelvis support may not be properly exerted depending on the amount of operation of the operating lever. There is sex.

On the other hand, the member supporting the pelvis may be other than the above-mentioned Pelvis support. For example, a seat-shaped member may be provided on the seat as the pelvis support member. This seat-shaped pelvis support member has a portion provided on the seat back and a portion provided on the seat cushion. In a configuration in which a pelvis support member having such a shape is provided in a seating device such as a seat, it is required to appropriately move the pelvis support member to correctly adjust the pelvis angle of the occupant.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to adjust the angle of the occupant's pelvis by using the pelvis support member while the occupant is seated on a seating device provided with the pelvis support member. An object of the present invention is to provide a vehicle seat that can be appropriately adjusted.

According to the vehicle seat of the present invention, the problem can be solved by: a seat back and a seat cushion ; a pelvis support member that supports the pelvic region of the occupant; a plate provided on the seat cushion; A movable mechanism for displacing the support member is provided, and a first kneading air cell is provided in front of the plate of the seat cushion.

Further, the seat cushion is provided with a second kneading air cell disposed rearward than the first kneading air cell, and the first kneading air cell is further arranged than the second kneading air cell. It is preferable that the width in the sheet width direction is small.

Further, a third kneading air cell is provided on the seat back side, and the third kneading air cell is disposed rearward than the first kneading air cell, and the first kneading air cell is more disposed than the third kneading air cell. It is also preferable that the width in the sheet width direction is large.

Further, the seat cushion is provided with a second kneading air cell, and the seat back side is provided with a third kneading air cell disposed rearwardly than the second kneading air cell, and the The first kneading air cell is preferably arranged in front of the second kneading air cell and the third kneading air cell.

Further, the seat cushion includes a left-right dividing portion that separates left and right side portions and a center portion of the seat cushion, and the first kneading air cell is arranged inside the left-right dividing portion in the seat width direction. It would be good if it were done.

Further, the seat cushion may include a front-rear partition section that partitions the front and rear portions of the seat cushion, and the first kneading air cell may be disposed in front of the front-rear partition section in the front-rear direction of the seat.

Further, the first kneading air cell may be disposed at a position opposite to a position corresponding to a region below the knees of the occupant.

Further, the first kneading air cell may be arranged avoiding the center of the seat cushion in the seat width direction.

According to the present invention, the pelvic angle of the occupant can be appropriately adjusted while the occupant is seated on the seating device.
Further, according to the present invention, it is possible to more appropriately adjust the degree of inclination according to the amount of change in the degree of inclination when the occupant is seated on the seating device.
Further, according to the present invention, variations in adjusting the degree of inclination are increased.
Further, according to the present invention, by controlling the movable mechanism to swing the pelvis support member while keeping the degree of inclination constant, stimulation is applied to the part of the passenger's body where the pelvis is located, and the part of the passenger's body where the pelvis is located is stimulated. It becomes possible to train.
Further, according to the present invention, by controlling the movable mechanism so that the pelvis support member reciprocates (swings) back and forth a predetermined number of times, the part of the occupant's body where the pelvis is located can be effectively trained. becomes possible.
Further, according to the present invention, accuracy in identifying an occupant seated on the seating device is improved.
Further, according to the present invention, it is possible to adjust the pelvic angle of the occupant while the occupant is seated on the vehicle seat.

FIG. 3 is a diagram showing a state where an occupant is seated on a vehicle seat. FIG. 1 is a schematic explanatory diagram of a seating device adjustment unit according to an embodiment of the present invention. FIG. 3 is a diagram showing the seat back and seat cushion with the outer skin removed. FIG. 3 is a diagram showing the seat back and seat cushion with the skin and pelvic support member removed. It is a figure when a pelvis support member is seen from the front. It is a figure when a pelvis support member is seen from above. 6 is a diagram showing a cross section taken along line AA in FIG. 5. FIG. 7 is a diagram showing a cross section taken along line BB in FIG. 6. FIG. It is a figure which shows the state where the seat back side support part of a pelvis support member is leaning forward. It is a figure which shows the state where the seat cushion side support part of a pelvis support member is raised. FIG. 3 is an explanatory diagram (part 1) of the rocking motion of the pelvis support member. FIG. 3 is an explanatory diagram (Part 2) of the rocking motion of the pelvis support member. It is a figure showing the flow of the main flow in control of ECU. It is a figure showing the flow of control of ECU by a first control mode. It is a figure showing the flow of control of ECU by a second control mode. It is a figure which shows the flow of control of ECU by a 3rd control mode. It is a figure showing the flow of control of ECU by forced exhaust mode.

Hereinafter, a configuration example and an operation example of an embodiment (this embodiment) of the present invention will be described. In the following, a case will be described using as an example a case where the seating device adjustment unit of the present invention is mounted on a vehicle. That is, in the embodiment described below, the seating device is a vehicle seat, and the seating device adjustment unit is provided for adjusting the vehicle seat.

Note that the seating device adjustment unit of the present invention is not limited to being installed in a vehicle, but can also be installed in a vehicle other than a vehicle (for example, an aircraft or a ship), and can adjust the seat installed in the vehicle. It can be used to

Furthermore, in the following description, the "front-back direction" refers to the front-back direction as seen from an occupant seated on a vehicle seat, and is a direction that coincides with the traveling direction of the vehicle. Further, the "seat width direction" corresponds to the width direction of the seating device, and is the left-right direction as seen from the occupant seated on the vehicle seat. Moreover, the "up-down direction" is the up-down direction as seen from the occupant seated on the vehicle seat, and corresponds to the vertical direction when the vehicle is traveling on a horizontal plane.

<<Overview of the seating device adjustment unit according to the present embodiment>>
First, the outline of the seating device adjustment unit (hereinafter simply referred to as the seating device adjustment unit 100) according to the present embodiment will be explained. The seating device adjustment unit 100 is mounted in a vehicle and is used for the purpose of correcting the posture of a vehicle occupant during a period when the vehicle occupant is seated on a vehicle seat S (hereinafter referred to as a seating period). To explain in more detail, the seating device adjustment unit 100 changes the state of a part of the vehicle seat S (specifically, the pelvis support member 1 described below) during the seating period, thereby adjusting the pelvis in the occupant's body. (hereinafter referred to as the pelvic region) is displaced. By displacing the pelvic region in this manner, the occupant's sitting posture is corrected, and more precisely, the occupant's pelvic angle (degree of inclination of the pelvis in the front-rear direction) is adjusted.

To explain the adjustment function of the seating device adjustment unit 100, three types of adjustment are possible in this embodiment. The first adjustment is to adjust the seat state so that the occupant's pelvic angle is corrected to an angle suitable for the occupant. The second adjustment is to adjust the seat condition in order to correct the occupant's pelvis angle to an ideal angle. The third adjustment is to adjust the seat state so as to swing the pelvic region of the occupant for the purpose of training the muscles of the pelvic region.

The occupant selects one of the three types of adjustments described above, and receives the selected adjustment during the seating period. In this embodiment, the seating device adjustment unit 100 is used to adjust the state of a seat corresponding to a driver's seat among the vehicle seats S. However, the seating device adjustment unit 100 is not limited to this, and the seating device adjustment unit 100 is used for the purpose of adjusting the state of a vehicle seat S other than the driver's seat (for example, a passenger seat or a rear seat seat). It's okay.

<<Configuration example of seating device adjustment unit>>
Next, a configuration example of the seating device adjustment unit 100 will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the seating device adjustment unit 100 includes a vehicle seat S serving as a seating device, and a pelvis support member 1 installed within the vehicle seat S. Further, the seating device adjustment unit 100 has a movable mechanism 50 that can move the pelvis support member 1, as shown in FIG. Further, the seating device adjustment unit 100 includes a kneading unit 80 in order to effectively perform the second adjustment described above. Further, the seating device adjustment unit 100 includes an ECU (Electronic Control Unit) 60, which is a device that controls the movable mechanism 50, and various sensors that transmit signals to the ECU 60. Each component of the seating device adjustment unit 100 will be described below.

(vehicle seat)
The vehicle seat S has the same structure as a general vehicle seat S, except that the pelvis support member 1 is provided inside. That is, the vehicle seat S has a seat back S1, a seat cushion S2, and a headrest S3, as shown in FIG. The seat back S1, the seat cushion S2, and the headrest S3 form a seating portion Sh that is the main body portion of the vehicle seat S. The seat back S1 and the seat cushion S2 each have a frame inside, and are configured by supporting the pad P on the frame and then covering the surface of the pad P with a skin. Note that, in consideration of the movement of the pelvic support member 1, it is desirable that the skin forming the seat back S1 and the seat cushion S2 be highly elastic.

(Pelvic support member)
The pelvic support member 1 is a resin molded product shaped like a seat. The pelvis support member 1 is provided within the vehicle seat S, and specifically, is provided so as to extend from the lower portion of the seat back S1 to the rear portion of the seat cushion S2. That is, a part of the pelvic support member 1 is provided within the seat back S1 as shown in FIG. 1, and the remaining part is provided within the seat cushion S2.

As can be seen from FIGS. 3 and 4, the portion of the pad P constituting the seat back S1 and the seat cushion S2, where the pelvis support member 1 is placed, is hollowed out to provide a space for installing the pelvis support member 1. is ensured. After the pelvis support member 1 is installed in such a space, the pad P is covered with the pelvis support member 1 by the skin that constitutes the seat back S1 and the seat cushion S2.

The seat-shaped pelvis support member 1 supports the pelvic region of the occupant's body during the sitting period, as shown in FIG. Further, each part of the pelvis support member 1 is movable. As each part of the pelvis support member 1 moves, the shape and arrangement position of the pelvis support member 1 change. To be more specific, the degree of bending of the pelvis support member 1 (indicated by the symbol α in FIG. 2) and the amount of displacement of the pelvis support member 1 from the initial position (indicated by the symbol β in FIG. 2) angular displacement) changes. By changing the shape and arrangement position of the pelvis support member 1 as described above, the seat condition (especially the condition around the occupant's pelvic region) can be adjusted.

The detailed structure of the pelvis support member 1 will be described below with reference to FIGS. 3 to 8. The pelvis support member 1 is seat-shaped and has a substantially L-shape when viewed from the side. Further, the pelvis support member 1 includes a seat back side support part 10, a seat cushion side support part 20, and a connecting part 30, as shown in FIGS. 5 and 6.

The seat back support part 10 forms the upper end portion of the pelvis support member 1, and is provided on the seat back S1 when the pelvis support member 1 is attached to the seating part Sh of the vehicle seat S. That is, the seat back side support part 10 is located behind the occupant's back during the seating period. To explain the shape of the seatback side support part 10, as shown in FIG. 5, it has a wide trapezoidal shape when viewed from the front, and is symmetrical with respect to the center of the pelvis support member 1 in the seat width direction. It has become. Further, as shown in FIG. 7, the seat back side support portion 10 is curved in an arcuate shape so as to be positioned forward toward the end in the seat width direction.

Further, as shown in FIG. 5, an inverted triangular notch 11 extending downward from the upper end of the seatback side supporter 10 is formed in the center of the seatback side supporter 10 in the seat width direction. ing. By forming this notch 11, the seat back side support part 10 is a part located on one end side in the seat width direction (the left half part in FIG. 5, hereinafter referred to as the first seat back side support part 10). portion 12) and a portion located on the other end side in the seat width direction (the right half portion in FIG. 5, hereinafter referred to as the second seat back side support portion 13).

The seat cushion side support portion 20 forms the lower end portion of the pelvis support member 1, and is provided on the seat cushion S2 when the pelvis support member 1 is attached to the seating portion Sh of the vehicle seat S. That is, the seat cushion side support part 20 is located below the buttocks of the occupant during the seating period. To explain the shape of the seat cushion side support part 20, the seat cushion side support part 20 is slightly wider than the seat back side support part 10, as shown in FIG. It has a symmetrical shape with the center of 1 as the border.

Further, as shown in FIG. 6, an inverted triangular notch 21 extending rearward from the front end of the seat cushion side support part 20 is formed in the center part of the seat cushion side support part 20 in the seat width direction. ing. By forming this notch 21, the seat cushion side support part 20 is a part located on one end side in the seat width direction (the right half part in FIG. 6, hereinafter referred to as the first seat cushion side support part). 22), and a portion located on the other end side in the seat width direction (the left half portion in FIG. 6, hereinafter referred to as the second seat cushion side support portion 23).

Moreover, as shown in FIG. 8, the first seat cushion side support part 22 and the second seat cushion side support part 23 are each curved in an arch shape so as to be positioned upwardly toward the end in the seat width direction. .

The connecting portion 30 is disposed directly below the seat back support portion 10 and connects the lower end of the seat back support portion 10 and the rear end of the seat cushion side support portion 20. Note that the connecting portion 30 is provided on the seat back S1 when the pelvis support member 1 is attached to the seating portion Sh of the vehicle seat S. That is, the connecting portion 30 is located behind the occupant's back during the seating period.

To explain the shape of the connecting portion 30, as shown in FIG. 5, the connecting portion 30 has an inverted isosceles trapezoid shape when viewed from the front, and becomes narrower toward the bottom. Further, the width (length in the seat width direction) of the connecting portion 30 is shorter than the width of the seat back side support portion 10 and shorter than the seat cushion side support portion 20. That is, the pelvis support member 1 is somewhat constricted inward in the seat width direction at the connecting portion 30.

Further, the connecting portion 30 has a shape that is symmetrical with respect to the center of the pelvis support member 1 in the seat width direction, and is curved in an arcuate shape so as to be positioned forward as it approaches the end in the seat width direction. .

By the way, the seat back side support part 10, the seat cushion side support part 20, and the connecting part 30 all have a base part 1x made of a plate material. The material of the plate material constituting the base portion 1x has appropriate flexibility. Therefore, when a load is applied to the pelvis support member 1, the pelvis support member 1 bends (deforms elastically) so that the location moves along the load application direction.

Therefore, when the seat back side support part 10 is pushed forward, the seat back side support part 10 falls toward the seat cushion side support part 20 (tilts forward). As the seat back support part 10 tilts forward, the degree of inclination of the seat back support part 10 with respect to the seat cushion support part 20 increases (in other words, the degree of bending of the pelvis support member 1 increases). Here, "the degree of bending increases" means that the seat back side support part 10 approaches the seat cushion side support part 20, and the angle α shown in FIG. 2 becomes smaller.

Similarly, when the seat cushion side support part 20 is pushed upward, the seat cushion side support part 20 rises toward the seat back side support part 10 (that is, the front end of the seat cushion side support part 20 moves upward). ). Then, as the seat cushion side support section 20 rises, the inclination angle of the seat cushion side support section 20 with respect to the seat back side support section 10 increases (in other words, the degree of bending of the pelvis support member 1 increases).

Note that when one of the seat back side support part 10 and the seat cushion side support part 20 moves toward the other so that the degree of bending of the pelvis support member 1 changes, the lower end of the connecting part 30 serves as the base point. That is, each of the seat back side support part 10 and the seat cushion side support part 20 can rotate around an axis along the seat width direction with the lower end of the connecting part 30 as a base point.

To further explain the configurations of the seatback side support part 10, the seat cushion side support part 20, and the connection part 30, the surface of the base part 1x that each of the seatback side support part 10, the seat cushion side support part 20, and the connection part 30 has. A piece-shaped cushion mat 1y is attached to the cushion mat 1y. The cushion mat 1y is attached to the surface of the base portion 1x that faces the occupant seated on the vehicle seat S, and has a shape that appropriately fits the pelvic region of the occupant. . In this embodiment, a plurality of cushion mats 1y are provided at positions spaced apart from each other.

(movable mechanism)
The movable mechanism 50 is provided to move the pelvis support member 1 so that the degree of bending of the pelvis support member 1 (in other words, the degree of inclination of the seatback side support part 10 or the seat cushion side support part 20) is changed. The movable mechanism 50 according to this embodiment includes lumbar supports 2, 3, a pump 6, and an air adjustment valve 7, as shown in FIG.

The lumbar supports 2 and 3 are constituted by air bags, and expand when air is sealed inside, and contract when the air inside is discharged. Further, as can be seen from FIGS. 3 and 4, the lumbar supports 2 and 3 are arranged on the back side of the pelvis support member 1 (on the opposite side to the side supporting the occupant) in the seat back S1 and the seat cushion S2. Each of the lumbar supports 2 and 3 presses the pelvic support member 1 from the back side by expanding. As a result, the pressed portion of the pelvis support member 1 moves along the pressing direction. Conversely, when each lumbar support 2, 3 contracts, the pressed portion of the pelvic support member 1 is released from the pressing force and returns to its original position.

To explain the lumbar supports 2 and 3 in detail, in this embodiment, a plurality of lumbar supports 2 and 3 are provided. The first lumbar support 2 (hereinafter referred to as seatback-side lumbar support 2) is arranged behind the seatback-side support portion 10 in the seatback S1. This seat back side lumbar support 2 is configured so that by pressing the seat back side support part 10 from the rear, the seat back side support part 10 rotates around an axis along the seat width direction with the connection part 30 as a base point. Move the seat back side support part 10.

Specifically, as shown in FIG. 9, the seatback side lumbar support 2 expands in a substantially fan shape when viewed from the side when inflated, and expands so that the amount of expansion (amount of expansion) increases toward the upper end. do. Further, the upper end portion of the seatback side lumbar support 2 faces the upper end portion of the rear surface of the seatback side support portion 10. Therefore, when the seat back lumbar support 2 expands in a substantially fan-like manner, the upper end portion of the seat back support portion 10 is pushed forward by the seat back lumbar support 2. As a result, as shown in FIG. 9, the seatback side support part 10 rotates forward (indicated by symbol M in the figure) about an axis along the seat width direction (indicated by symbol M in the figure) with the connection part 30 as a base point. tilt). As a result, the degree of inclination of the seatback side support part 10 with respect to the seat cushion side support part 20 changes.

The second lumbar support 3 (hereinafter referred to as seat cushion side lumbar support 3) is arranged at a position below the seat cushion side support part 20 in the seat cushion S2. This seat cushion side lumbar support 3 is configured such that by pressing the seat cushion side support part 20 from below, the seat cushion side support part 20 rotates about an axis along the seat width direction with the connecting part 30 as a base point. Move the seat cushion side support section 20.

Specifically, as shown in FIG. 10, the seat cushion side lumbar support 3 expands in a substantially fan shape when viewed from the side when inflated, and expands so that the amount of expansion (inflation amount) increases toward the front end. do. Further, the front end portion of the seat cushion side lumbar support 3 is located directly below the front end portion of the lower surface of the seat cushion side support portion 20. Therefore, when the seat cushion side lumbar support 3 expands in a substantially fan shape, the front end portion of the seat cushion side support part 20 is pressed upward by the seat cushion side lumbar support 3. As a result, the seat cushion side support part 20 rotates (raises up) upward about the axis (indicated by symbol M in the figure) along the seat width direction with the connection part 30 as the base point, as shown in FIG. It becomes like this. As a result, the degree of inclination of the seat cushion side support section 20 with respect to the seat back side support section 10 changes.

Note that, as shown in FIG. 4, a rectangular support plate 40 is arranged below the seat cushion side support part 20. Since this support plate 40 is relatively large in size, it supports the seat cushion side support portion 20 over a relatively wide range. The seat cushion side lumbar support 3 is arranged below the support plate 40. Therefore, the seat cushion side lumbar support 3 presses the seat cushion side support part 20 via the support plate 40. In this way, the seat cushion side lumbar support 3 presses the seat cushion side support part 20 via the support plate 40, so that the seat cushion side support part 20 can be moved efficiently.

As described above, in this embodiment, by changing the amount of air sealed in the seatback side lumbar support 2 and the seat cushion side lumbar support 3, the degree of inclination of the seatback side support part 10 and the seat cushion side support part 20 (i.e. , degree of bending of the pelvic support member 1).

The pump 6 and the air adjustment valve 7 are devices that operate to adjust the amount of expansion of the lumbar support. The pump 6 is constituted by a pump capable of suctioning and supplying air, and supplies air to each lumbar support 2 and 3 and sucks air inside each lumbar support 2 and 3. Note that, as shown in FIG. 2, two types of pumps are used in this embodiment, one pump (hereinafter referred to as the first pump 6A) is a pump that can suck and supply air, and the other pump is a pump that can suck and supply air. The pump (hereinafter referred to as second pump 6B) is a pump that can only supply air. However, the present invention is not limited to this, and only a pump capable of sucking and supplying air may be used.

The air adjustment valve 7 opens and closes to adjust the air pressure in each lumbar support 2, 3. In addition, in this embodiment, as shown in FIG. 2, five air adjustment valves 7 are used in this embodiment. The first air adjustment valve 7 (hereinafter referred to as the first inflow valve 7A) is an air adjustment valve 7 that opens when supplying air to the seatback side lumbar support 2. The second air adjustment valve 7 (hereinafter referred to as second inflow valve 7B) is an air adjustment valve 7 that opens when air is supplied to the seat cushion side lumbar support 3. The third air adjustment valve 7 (hereinafter referred to as the first suction valve 7C) is an air adjustment valve 7 that opens when air in the seatback side lumbar support 2 is sucked. The fourth air adjustment valve 7 (hereinafter referred to as the second suction valve 7D) is an air adjustment valve 7 that opens when sucking air inside the seat cushion side lumbar support 3. The fifth air adjustment valve 7 is an exhaust valve 7E provided for exhausting the air sucked from the seatback side lumbar support 2 and the seat cushion side lumbar support 3.

By switching the opening and closing of each of the five air adjustment valves 7, it becomes possible to individually adjust the amount of inflation of the seat back lumbar support 2 and the seat cushion lumbar support 3. For example, by opening the first inflow valve 7A and supplying air from the pump 6 with the remaining air adjustment valves 7 closed, the seatback side lumbar support 2 can be expanded.

In addition, by adjusting the operation of the pump 6 and the opening and closing of each air adjustment valve 7, it is possible to simultaneously adjust the amount of expansion of the seatback side lumbar support 2 and the seat cushion side lumbar support 3. For example, while the first pump 6A is sucking air from the seat back lumbar support 2 with the first suction valve 7C open, the second pump 6B is sucking air from the seat back lumbar support 2 with the second inflow valve 7B open. Supply air to support 3. This makes it possible to increase the amount of inflation of the seat back lumbar support 2 while decreasing the amount of inflation of the seat cushion lumbar support 3.

By simultaneously adjusting the amount of expansion of each of the lumbar supports 2 and 3, it becomes possible, for example, to swing the pelvis support member 1 without changing the degree of flexion of the pelvis support member 1. Specifically, the amount of expansion of one of the seat back lumbar support 2 and the seat cushion lumbar support 3 is increased, and at the same time, the amount of expansion of the other is decreased by the same amount. As a result, as shown in FIGS. 11A and 11B, the pelvis support member 1 swings about the axis (indicated by symbol N in the figures) while keeping the degree of flexion constant. Here, the axis is a fulcrum when the pelvis support member 1 swings, and is located along the seat width direction and below the seat cushion side support part 20.

The kneading unit 80 performs a kneading operation prior to the pelvic support member 1 when a second control mode, which will be described later, is selected. The kneading motion is a motion performed to loosen the occupant's muscles when correcting the occupant's pelvic angle to an ideal angle. The kneading unit 80 has a total of six kneading units, a pair of left and right air cells (hereinafter referred to as kneading air cells 81), which are provided at three locations in the seating area Sh, extending from the waist to the thighs of the occupant. It is constituted by a kneading air cell 81. Each kneading air cell 81 expands when air is sealed inside it, and contracts when the sealed air is exhausted to the outside. The filling and discharging of air into the kneading air cell 81 is realized by the pump 6 and the air adjustment valve 7 described above. In addition, in FIG. 2, illustration of the kneading air cell 81 and the intake line to the kneading air cell 81 is omitted.

To explain the arrangement position of the kneading air cell 81, the first kneading air cell 81 is arranged at a position corresponding to a region corresponding to the gluteus maximus on the back of the occupant. Specifically, as shown in FIG. One is pasted and fixed on both ends in the direction.

The second kneading air cell 81 is disposed on the back of the occupant at a position opposite to a position corresponding to the lower part of the thigh. Specifically, as shown in FIG. 3, the second kneading air cell 81 is located in the front area of the cushion mat 1y provided on the seat cushion side support part 20 of the pelvis support member 1 in the seat width direction. One is pasted and fixed on both ends of the.
The third kneading air cell 81 is disposed on the passenger's back at a position opposite to a position corresponding to a region below the knees. Specifically, as shown in FIG. 3, the third kneading air cells 81 are attached one by one to both ends in the seat width direction of the front end of the pad P that constitutes the seat cushion S2. Fixed.
Note that the number and arrangement positions of the kneading air cells 81 described above are merely examples, and may be different from those described above.

(Various sensors)
Various sensors are attached to the vehicle seat S to measure the state of the seat during a seating period. In this embodiment, an angle sensor 8, an air pressure sensor 9, and a weight sensor 70 are attached.

The angle sensor 8 is a sensor that measures the degree of inclination, that is, the inclination angle, of each of the seat back support part 10 and the seat cushion support part 20 during the seating period. The angle sensor 8 is a known sensor capable of detecting the tilt angle in a non-contact manner. Here, the inclination angle is a displacement amount expressed in angle when each of the seatback side support part 10 and the seat cushion side support part 20 is displaced from the initial position. Then, the angle sensor 8 outputs a signal to the ECU 60 according to the measurement result of the inclination angle.

In the present embodiment, one angle sensor 8 is attached to each of the seatback side support section 10 and the seat cushion side support section 20. The angle sensor 8 attached to the seat back support part 10 measures the inclination angle of the seat back support part 10 with respect to the seat cushion support part 20 during the seating period. Moreover, the angle sensor 8 attached to the seat cushion side support part 20 measures the inclination angle of the seat cushion side support part 20 with respect to the seat back side support part 10 during the seating period. Incidentally, a configuration may be adopted in which only one of the two angle sensors 8 is installed.

The air pressure sensor 9 measures the air pressure inside the seat back lumbar support 2 and the seat cushion lumbar support 3. The air pressure sensor 9 is a known sensor capable of detecting the air pressure of the lumbar support, and is provided for each lumbar support. Then, the air pressure sensor 9 outputs a signal to the ECU 60 according to the measurement result of the air pressure. Note that the air pressure changes depending on the amount of air sealed in each lumbar support (in other words, the amount of expansion), and also changes depending on the seating pressure applied when the occupant is seated on the vehicle seat S.

The weight sensor 70 measures the amount of change in the weight of the vehicle seat S that changes when an occupant sits on the vehicle seat S, in other words, the weight of the occupant. The weight sensor 70 is a known seat weight sensor, and is attached to a position below the seat cushion S2. Then, the weight sensor 70 outputs a signal to the ECU 60 according to the measurement result of the passenger's weight.

(ECU)
The ECU 60 constitutes a control unit that controls the movable mechanism 50, and controls starting and stopping of the pump 6 and opening and closing of the air adjustment valve 7 during the seating period. Further, the ECU 60 receives output signals from the various sensors described above, and controls the movable mechanism 50 according to the measurement results of the sensors indicated by the received signals.

To explain the control modes when the ECU 60 controls the movable mechanism 50, four types of control modes are prepared in this embodiment. The occupant selects one mode from four types of control modes through the operation switch 61. The ECU 60 then controls the movable mechanism 50 according to one mode selected from the four types of control modes.

Here, four types of control modes are provided: a first control mode, a second control mode, a third control mode, and a forced exhaust mode. Each mode will be explained below.

The first control mode is a mode in which the degree of flexion of the pelvis support member 1 is adjusted so that the pelvic angle of the occupant is corrected to an angle suitable for the occupant. Specifically, the ECU 60 stores set values (hereinafter referred to as first set values) set for each of a plurality of pre-registered occupants for each occupant. This first setting value is a value set as the degree of flexion of the pelvis support member 1 suitable for the occupant to continue sitting on the vehicle seat S.

Then, when controlling the movable mechanism 50 according to the first control mode, the ECU 60 reads out the first set value corresponding to the occupant seated on the vehicle seat S. Then, the ECU 60 operates the movable mechanism 50 so that the degree of flexion of the pelvis support member 1 (in other words, the degree of inclination of the seatback side support part 10 and the seat cushion side support part 20) changes to the read first setting value. Control.

The second control mode is a mode in which the degree of flexion of the pelvis support member 1 is adjusted so that the pelvis angle of the occupant is corrected (corrected) to an ideal angle. Specifically, the ECU 60 stores set values (hereinafter referred to as second set values) set for each of a plurality of pre-registered occupants for each occupant. This second set value is a value set as the degree of bending of the pelvis support member 1 suitable for correcting the pelvis angle of the occupant to an ideal angle.

Then, when controlling the movable mechanism 50 according to the second control mode, the ECU 60 reads out the second setting value corresponding to the occupant seated on the vehicle seat S. Then, the ECU 60 operates the movable mechanism 50 so that the degree of flexion of the pelvis support member 1 (in other words, the degree of inclination of the seat back side support part 10 and the seat cushion side support part 20) changes to the read second set value. Control.

As described above, the first control mode and the second control mode control the movable mechanism 50 so that the degree of flexion of the pelvis support member 1 changes to a set value depending on the occupant sitting on the vehicle seat S. Common. On the other hand, the first set value and the second set value set for the same occupant are different from each other. For example, the second set value has a larger amount of change in the degree of bending than the first set value. It is set to be large.

Note that when the second control mode is selected, the ECU 60 controls the movable mechanism 50 so that the kneading air cell 81 that constitutes the kneading unit 80 expands and contracts (in other words, so that the kneading operation is performed). The pump 6 and air adjustment valve 7 are controlled.

The third control mode is a mode in which the entire pelvic support member 1 is swung while keeping the degree of flexion of the pelvic support member 1 constant for the purpose of training the muscles of the occupant's pelvic region. Specifically, in the third control mode, the inflation amounts of the seat back lumbar support 2 and the seat cushion lumbar support 3 are adjusted simultaneously.

To explain more precisely, the amount of expansion of the seat back lumbar support 2 is increased by a certain amount, and at the same time, the amount of expansion of the seat cushion side lumbar support 3 is decreased by the same amount. Thereby, the pelvis support member 1 moves to assume a forward leaning posture while keeping the degree of flexion constant. Thereafter, the amount of inflation of each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 is changed in the reverse procedure to the above procedure. Thereby, the pelvis support member 1 moves to assume a backward tilted posture while keeping the degree of flexion constant. By repeating the above procedure, the pelvis support member 1 comes to reciprocate in the swinging direction about the axis (indicated by symbol N in FIGS. 11A and 11B) along the seat width direction.

Note that when controlling the movable mechanism 50 according to the third control mode, the ECU 60 controls the movable mechanism 50 to reciprocate the pelvis support member 1 a predetermined number of times in the swing direction. In other words, the ECU 60 finishes the rocking operation when the pelvis support member 1 has reciprocated a predetermined number of times in the rocking direction, and thereafter moves the pelvis support member 1 to return to a predetermined position (for example, the initial position). Control mechanism 50.

The forced exhaust mode is a mode in which air is forcibly exhausted from each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3. Specifically, air suction is performed by the first pump 6A with the first suction valve 7C, the second suction valve 7D, and the exhaust valve 7E open. As a result, the air from each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 is exhausted.

In this embodiment, the above four types of modes are included as control modes, but the types and number of control modes are not particularly limited, and for example, modes other than the above four types are included. The mode may further be included.

By the way, in this embodiment, the ECU 60 has a function of identifying an occupant seated on the vehicle seat S. That is, the ECU 60 according to the present embodiment constitutes an occupant identification section for identifying an occupant seated on the vehicle seat S.

Specifically, at the time when the occupant begins to sit on the vehicle seat S (i.e., at the start of the seating period), the angle sensor 8 detects the seatback side support portion 10 and the seat cushion side support portion 20 at that time. The weight sensor 70 measures the seat weight (that is, the weight of the occupant) at that time. The ECU 60 receives output signals from the angle sensor 8 and the weight sensor 70, and specifies the measurement result at the start of the seating period.

The ECU 60 also stores, for each of the plurality of pre-registered occupants, information regarding the amount of change in the degree of flexion of the pelvic support member 1 when seated on the vehicle seat S, and information regarding the person's weight. ing. When the ECU 60 specifies the measurement results of the angle sensor 8 and the weight sensor 70 at the start of the seating period, the ECU 60 can identify the occupant by comparing the specified measurement results with the above information.

As described above, in this embodiment, the ECU 60 identifies the occupant based on the measurement results of the angle sensor 8 and the weight sensor 70, but the present invention is not limited to this. Information other than the measurement results of the angle sensor 8 and the weight sensor 70, such as occupant information input by the occupant using an input device (not shown), image information of the occupant taken by a camera installed in the vehicle, or information about the occupant The occupant may be identified based on occupant information obtained by communicating with a portable information terminal (such as a smartphone). Further, the occupant may be identified by a device other than the ECU 60.

<<Operation example of seating device adjustment unit>>
Next, an example of the operation of the seating device adjustment unit 100 described above will be described. Adjustment of the state of the vehicle seat S (hereinafter referred to as adjustment processing) in the seating device adjustment unit 100 is started, for example, when an occupant gets into the vehicle. Further, the main flow of the adjustment process proceeds according to the procedure shown in FIG.

Specifically, in the main flow, the ECU 60 first controls the movable mechanism 50 to move the seat back lumbar support 2 and the seat cushion lumbar support 3 during a non-seating period when no occupant is seated on the vehicle seat S. Each is set to an initial state (S001). To explain in more detail, the ECU 60 controls the movable mechanism 50 so that a predetermined amount of air is filled in each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 before the occupant is seated on the vehicle seat S. control. As a result, each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 expands until their inclination angles reach their initial values.

Note that the ECU 60 stores the initial value of the inclination angle and the air pressure corresponding to the initial value for each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3. Then, when the ECU 60 inflates the seatback side lumbar support 2 and the seat cushion side lumbar support 3 until the inclination angle reaches the initial value in step S001, the ECU 60 monitors the measurement results of the air pressure sensor 9, and when the measurement results are set to the initial values. Air supply is stopped when the air pressure corresponding to the value is reached.

After that, when the occupant sits on the vehicle seat S, the pelvic support member 1 supports the occupant's pelvic region, and accordingly, the inclination angle of each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 changes. do. The angle sensor 8 measures the inclination angle of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 at that point in time (that is, at the start of the seating period), and outputs a signal according to the measurement result (S002). The ECU 60 receives the output signal from the angle sensor 8 and specifies the measurement result of the inclination angle at the start of the seating period (S003).

On the other hand, the ECU 60 stores the inclination angle of each of the seat back lumbar support 2 and the seat cushion lumbar support 3 when adjusted to the initial state during the non-seating period, that is, the initial value of the inclination angle. Then, the ECU 60 identifies the difference between the measurement result of the inclination angle specified in step S003 and the initial value of the inclination angle (S004).

Further, when the occupant sits on the vehicle seat S, the weight sensor 70 measures the seat weight at that time, that is, the weight of the occupant, and outputs a signal according to the measurement result (S005). The ECU 60 receives the output signal from the weight sensor 70 and identifies the weight of the occupant seated on the vehicle seat S (S006).

Then, the ECU 60 identifies the occupant seated in the vehicle seat S based on the difference between the measurement result of the inclination angle specified in step S004 and the initial value, and the weight of the occupant specified in step S006. (S007).

After that, when the operation switch 61 is operated by the occupant (S008), the ECU 60 uses this as a trigger to control the movable mechanism 50. More specifically, when controlling the movable mechanism 50, the ECU 60 specifies the control mode selected by the occupant through the operation switch 61 (S009). Thereafter, the ECU 60 controls the movable mechanism 50 according to the specified control mode. The control of the movable mechanism 50 in each control mode ends when the control end condition is satisfied. The control flow in each control mode will be explained in detail below.

When the first control mode is selected, the ECU 60 controls the movable mechanism 50 according to the flow illustrated in FIG. 13. Specifically, the ECU 60 first reads out the first setting value corresponding to the occupant identified in step S007 from among the first setting values stored for each occupant (S011). After that, the ECU 60 controls the movable mechanism 50 so that the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20 becomes the first set value (S012).

To explain in more detail, the ECU 60 calculates the difference between the current tilt angle and the first set value. Thereafter, the ECU 60 controls the pump 6 and the air adjustment valve 7 so that an amount of air corresponding to the calculated difference is supplied to or sucked into the seat back lumbar support 2 and the seat cushion lumbar support 3. As a result, the amount of inflation of each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 is adjusted so that the inclination angle of the seatback side support section 10 and the seat cushion side support section 20 becomes the first set value. .

Note that while controlling the movable mechanism 50 according to the first control mode, the ECU 60 monitors the air pressure of the seat back lumbar support 2 and the seat cushion lumbar support 3 measured by the air pressure sensor 9. Then, the EUC 60 ends the control of the movable mechanism 50 when the measurement result of the air pressure sensor 9 reaches the air pressure corresponding to the first setting value.

As described above, in the first control mode, the movable mechanism 50 is controlled so that the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20 becomes the first set value. Here, the first set value is a value corresponding to the occupant seated on the vehicle seat S, and strictly speaking, a value corresponding to the occupant identified by the ECU 60 from the measurement results of the angle sensor 8 and the weight sensor 70. It is. In this sense, the first control mode can be said to be a mode in which the movable mechanism 50 is controlled according to the identification results of the occupant and the measurement results of the angle sensor 8 and the weight sensor 70.

Furthermore, in this embodiment, the occupant is identified from the difference between the measurement result of the tilt angle at the start of the seating period and the initial value of the tilt angle. Therefore, the first control mode can be said to be a mode in which the movable mechanism 50 is controlled according to the initial value of the inclination angle and the measurement result of the angle sensor 8 during the seating period.

Next, a case where the second control mode is selected will be described. In the second control mode, the ECU 60 controls the movable mechanism 50 according to the flow illustrated in FIG. 14. Specifically, the ECU 60 first starts the kneading operation by controlling the pump 6 and the air adjustment valve 7 of the movable mechanism 50 to expand and contract each kneading air cell 81 of the kneading unit 80 ( S021). Here, a plurality of patterns are prepared for the kneading operation, and in this embodiment, three patterns (kneading patterns) are prepared.

The first kneading pattern is a pattern in which all six kneading air cells 81 are expanded at the same timing and deflated at the same timing. In the second kneading pattern, after inflating and deflating the kneading air cell 81 provided at a position corresponding to the lower part of the passenger's knee, the kneading air cell 81 provided at a position corresponding to the lower part of the occupant's thigh is expanded. 81 is expanded and contracted, and then the kneading air cell 81 provided at a position corresponding to the gluteus maximus of the occupant is expanded and contracted. The third kneading pattern simultaneously inflates the kneading air cell 81 provided at a position corresponding to the occupant's lower knees and the kneading air cell 81 provided at a position corresponding to the occupant's gluteus maximus. This is a pattern in which the kneading air cells 81 are simultaneously deflated, and then the kneading air cells 81 provided at positions corresponding to the lower thighs of the occupant are expanded and contracted.

The ECU 60 controls the movable mechanism 50 so that the kneading operation is performed according to the set pattern among the three kneading patterns. Then, when the kneading operation continues for a predetermined time, the ECU 60 temporarily stops the movable mechanism 50 and ends the kneading operation (S022).

Thereafter, the ECU 60 reads out the second setting value corresponding to the occupant identified in step S007 from among the second setting values stored for each occupant (S023). Then, the ECU 60 controls the movable mechanism 50 so that the inclination angle of each of the seat back side support part 10 and the seat cushion side support part 20 becomes the second set value (S024).

To explain in more detail, the ECU 60 calculates the difference between the current tilt angle and the second set value. Thereafter, the ECU 60 controls the pump 6 and the air adjustment valve 7 so that an amount of air corresponding to the calculated difference is supplied to or sucked into the seat back lumbar support 2 and the seat cushion lumbar support 3. As a result, the amount of inflation of each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 is adjusted so that the inclination angle of the seatback side support part 10 and the seat cushion side support part 20 becomes the second set value. .

Note that while controlling the movable mechanism 50 according to the second control mode, the ECU 60 monitors the air pressure of the seat back lumbar support 2 and the seat cushion lumbar support 3 measured by the air pressure sensor 9. Then, when the measurement result of the air pressure sensor 9 reaches the air pressure corresponding to the second set value, the ECU 60 controls the movable mechanism 50 so that the air pressure at that point is maintained for a certain period of time (S025). Then, when the air pressure is maintained for a certain period of time, the ECU 60 controls the movable mechanism 50 so that the air from each of the seat back lumbar support 2 and the seat cushion lumbar support 3 is exhausted (S026). Finally, when all the air from the seat back lumbar support 2 and the seat cushion lumbar support 3 is exhausted, the ECU 60 ends the control of the movable mechanism 50.

As described above, in the second control mode, the movable mechanism 50 is controlled so that the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20 becomes the second set value. Here, the second set value is a value corresponding to the occupant seated on the vehicle seat S, and strictly speaking, a value corresponding to the occupant identified by the ECU 60 from the measurement results of the angle sensor 8 and the weight sensor 70. It is. In this sense, the second control mode can be said to be a mode in which the movable mechanism 50 is controlled according to the identification results of the occupant and the measurement results of the angle sensor 8 and the weight sensor 70.

Furthermore, in this embodiment, the occupant is identified from the difference between the measurement result of the tilt angle at the start of the seating period and the initial value of the tilt angle. Therefore, the second control mode can be said to be a mode in which the movable mechanism 50 is controlled according to the initial value of the inclination angle and the measurement result of the angle sensor 8 during the seating period.

Next, a case where the third control mode is selected will be described. In the third control mode, the ECU 60 controls the movable mechanism 50 according to the flow illustrated in FIG. 15. Specifically, the ECU 60 first specifies the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20 at that time (S031). Then, the ECU 60 controls the movable mechanism 50 so that the entire pelvis support member 1 tilts forward while maintaining the specified inclination angle (S032).

Specifically, the ECU 60 controls the movable mechanism 50 so that the inflation amounts of the seat back lumbar support 2 and the seat cushion lumbar support 3 are adjusted simultaneously. At this time, the amount of expansion of the seat back lumbar support 2 increases by the amount necessary to tilt the seat back support part 10 forward by a predetermined angle. On the other hand, the amount of expansion of the seat cushion side lumbar support 3 is reduced by an amount comparable to the increase in the amount of expansion of the seat back side lumbar support 2. As a result, the pelvis support member 1 tilts forward by a predetermined angle while maintaining its degree of flexion.

After that, the ECU 60 controls the movable mechanism 50 so that the inflation amount of each of the seat back lumbar support 2 and the seat cushion lumbar support 3 is adjusted in a procedure opposite to the above procedure (S033). Thereby, the amount of expansion of the seat cushion side lumbar support 3 increases by the amount necessary to tilt the seat back side support part 10 backward by a predetermined angle. On the other hand, the amount of expansion of the seatback side lumbar support 2 is reduced by an amount comparable to the increase in the amount of expansion of the seat cushion side lumbar support 3. As a result, the pelvis support member 1 tilts backward by a predetermined angle while maintaining its degree of flexion.

The ECU 60 controls the movable mechanism 50 so that the above-described forward tilting operation and backward tilting operation of the pelvis support member 1 are alternately repeated. Further, the ECU 60 counts the number of rocking operations, and specifically increases the count by 1 each time the pelvis support member 1 is tilted forward and tilted backward once (S034).

Then, when the count reaches a predetermined number (S035), the ECU 60 ends the control for swinging the pelvis support member 1. After that, the ECU 60 is movable so that the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20 returns to the angle specified in step S003 (that is, the inclination angle at the start of the seating period). The mechanism 50 is controlled (S036). Then, when the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20 returns to the inclination angle at the start of the seating period, the ECU 60 ends the control of the movable mechanism 50.

Next, the case where the forced exhaust mode is selected will be explained. In the forced exhaust mode, the ECU 60 uses a movable mechanism to reduce the air pressure of each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 to a predetermined value. 50 (S041). Further, when the air pressure of each of the seatback side lumbar support 2 and the seat cushion side lumbar support 3 has decreased to a predetermined value, the ECU 60 adjusts the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20. The movable mechanism 50 is controlled so as to return to the angle specified in step S003 (that is, the inclination angle at the start of the seating period) (S042). Then, when the inclination angle of each of the seatback side support part 10 and the seat cushion side support part 20 returns to the inclination angle at the start of the seating period, the ECU 60 ends the control of the movable mechanism 50.

<<Other embodiments>>
Up to this point, the configuration of the seating device adjustment unit that adjusts the seat condition of the vehicle seat S has been described as an embodiment of the present invention. However, the above embodiment is an example for facilitating understanding of the present invention, and does not limit the present invention. That is, the present invention may be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof.

Further, in the above embodiment, a lumbar support (air bag) that can be expanded and contracted by air flowing in and out is used as a movable mechanism. However, the present invention is not limited to this, and other movable mechanisms (specifically, a mechanism that moves each part of the pelvic support member 1 by pulling a wire, or a mechanism that moves each part of the pelvis support member 1 using a rod that can move forward and backward) can be used. A moving mechanism) may also be used.

Furthermore, in the embodiment described above, when moving the pelvis support member 1, the seatback side support part 10 and the seat cushion side support part 20 are rotated about the axis along the seat width direction. However, there is no particular limitation on the direction in which the seat back side support part 10 or the seat cushion side support part 20 is moved, and the seat back side support part 10 or the seat cushion side support part 20 can be moved in the front-rear direction or the up-down direction. You can also go straight.

1 Pelvic support member 1x Base part 1y Cushion mat 2 Seat back side lumbar support 3 Seat cushion side lumbar support 6 Pump 6A First pump 6B Second pump 7 Air adjustment valve 7A First inflow valve 7B Second inflow valve 7C First suction Valve 7D Second suction valve 7E Exhaust valve 8 Angle sensor (sensor)
9 Air pressure sensor 10 Seat back side support part 11 Notch 12 First seat back side support part 13 Second seat back side support part 20 Seat cushion side support part 21 Notch 22 First seat cushion side support part 23 Second seat Cushion side support section 30 Connection section 40 Support plate 50 Movable mechanism 60 ECU (control section, occupant identification section)
61 Operation switch 70 Weight sensor 80 Kneading unit 81 Kneading air cell 100 Seating device adjustment unit P Pad S Vehicle seat (seating device)
Sh Seating area S1 Seat back S2 Seat cushion S3 Headrest

Claims (8)

a seat back and a seat cushion ;
a pelvic support member that supports the pelvic region of the occupant;
a plate provided on the seat cushion ;
a movable mechanism that displaces the pelvic support member via the plate,
A vehicle seat characterized in that a first kneading air cell is provided in front of the plate of the seat cushion. The seat cushion is provided with a second kneading air cell arranged behind the first kneading air cell,
The vehicle seat according to claim 1, wherein the first kneading air cell has a smaller width in the seat width direction than the second kneading air cell. A third kneading air cell is provided on the seat back side, and the third kneading air cell is arranged behind the first kneading air cell.
3. The vehicle seat according to claim 1, wherein the first kneading air cell has a larger width in the seat width direction than the third kneading air cell. The seat cushion is provided with a second kneading air cell,
A third kneading air cell is provided on the seat back side, and the third kneading air cell is arranged behind the second kneading air cell.
2. The vehicle seat according to claim 1, wherein the first kneading air cell is arranged forward of the second kneading air cell and the third kneading air cell. The seat cushion includes a left-right dividing portion that separates left and right side portions and a center portion of the seat cushion,
The vehicle seat according to any one of claims 1 to 4, wherein the first kneading air cell is arranged inside the left-right partition in the seat width direction. The seat cushion includes a front-rear partition section that separates the front and rear parts of the seat cushion,
The vehicle seat according to any one of claims 1 to 5, wherein the first kneading air cell is disposed further forward in the front-rear direction of the seat than the front-rear partition. The vehicle seat according to any one of claims 1 to 6, wherein the first kneading air cell is arranged at a position facing a position corresponding to a region below the knees of the occupant. The vehicle seat according to any one of claims 1 to 7, wherein the first kneading air cell is arranged so as to avoid the center of the seat cushion in the seat width direction.