JP2015096383A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat which properly pushes a shoulder of a person seated on the vehicle seat and stabilizes the seating posture.SOLUTION: A vehicle seat S includes a seat back S1 supporting a seating person from the back side. A shoulder support part Sa1, which supports a shoulder of the seating person, of the seat back S1 includes air cells 10 expanded by air being enclosed therein. The expansion of the air cells 10 moves one end part of the shoulder support part Sa1, which is located at the outer side in a width direction of the vehicle seat S, to the front side relative to the other end part located at the inner side in the width direction.

Description

  The present invention relates to a vehicle seat, and more particularly, to a vehicle seat including a seat back that supports a seated person from the back side.

  One of the performances required for a vehicle seat is to stably maintain the posture of the seated person (sitting posture), and several technologies that meet such a demand have already been developed (for example, Patent Documents). 1). In the vehicle seat described in Patent Document 1, a protective bag is provided on the shoulder portion of the seat back. The protective bag body bulges forward in a convex shape, thereby covering the seated person's shoulder so as to go forward from above and engaging with the seated person's shoulder. As a result, the posture of the seated person can be stably maintained, and in particular, the upper body of the seated person can be prevented from moving upward.

JP 2000-95000 A

  By the way, in the vehicle seat described in Patent Document 1, the protective bag body bulges when an excessive load is input to the seat due to a rear collision or the like, and a seated person is prevented in an emergency. It is used as a protection device. On the other hand, as in the vehicle seat described in Patent Document 1, holding the seated person's shoulder to hold the seated person's posture is also required during normal vehicle travel. More specifically, among the pressures applied to the seat back at the time of sitting, the pressure applied to the portion supporting the shoulders of the seated person becomes relatively high. Can be stabilized. In order to obtain such an effect, it is required to appropriately hold a seated person's shoulder when the vehicle is traveling.

However, in the configuration in which the protective bag body wraps around the shoulder of the seated person from above and engages with the shoulder of the seated person as in Patent Document 1, the body is restricted from moving forward and upward. However, it is difficult to regulate the movement in the left-right direction (sheet width direction). Then, as long as the upper body of the seated person cannot be appropriately restricted from moving in the left-right direction, it becomes difficult to stabilize the posture of the seated person.
Also, if you want to hold the shoulder of the seated person with only the protective bag body to maintain the posture of the seated person, it is necessary to use a protective bag body that is large enough to hold the shoulder of the seated person, The size of the protective bag body and the mechanism for inflating the bag body will be increased.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat capable of stabilizing a seating posture by appropriately pressing a shoulder of a seated person. Another object of the present invention is to appropriately hold down the seated person's shoulder even when the bag body is further reduced in size in the configuration in which the seat back is provided with the bag body.

According to the vehicle seat of the present invention, the subject is a vehicle seat including a seat back that supports a seated person from the back side, and the shoulder support portion that supports the shoulder of the seated person among the seat backs. Is provided with a bag body that bulges when the fluid is sealed, and the bag body bulges so that one end of the shoulder support portion on the outer side in the width direction of the vehicle seat is The problem is solved by moving forward from the other end on the inner side in the width direction.
According to the above vehicle seat, the bag body bulges, so that one end of the seat back on the outer side in the width direction of the seat back is forward of the other end on the inner side in the width direction. Move to. Thereby, the force which goes to a width direction inner side acts with respect to a seated person's shoulder from a seat back. That is, the seated person's shoulder is pushed inward in the width direction by the shoulder support portion of the seat back. As a result, it is possible to suppress the upper body of the seated person from shifting in the width direction, and the posture of the seated person can be stably maintained.

In the above vehicle seat, when the one end moves forward from the other end due to the bulging of the bag, the upper portion in the one end is the lower portion in the one end. It is preferable to move forward.
If it is said structure, the force which acts with respect to a seated person's shoulder from a seat back comes to have the component which goes to the width direction inner side, and the component which goes below. That is, the seated person's shoulder is pushed inward in the width direction and also pushed downward. As a result, it is possible to suppress the upper body of the seated person from moving upward and hold the seated person's posture more stably.

In the above vehicle seat, it is preferable that the bag body is provided such that an end on the outer side in the width direction of the bag body is positioned below an end on the inner side in the width direction.
In said structure, the bag body is arrange | positioned so that a shoulder of a general seated person may be assumed and it falls toward the outer side. Accordingly, the shoulder support portion of the seat back supports the seat occupant so as to wrap the shoulder, and the posture of the seat occupant is further stabilized.

In the above vehicle seat, the seat back includes a plate-like member disposed at a front position of the bag body, and the bag body swells while coming into contact with the rear surface of the plate-like member. In the plate-like member, the plate-like member is deformed so that the portion corresponding to the one end portion is positioned forward of the portion corresponding to the other end portion, whereby the one end portion is more than the other end portion. It is preferable that the area of the front surface of the plate-shaped member moves forward and is larger than the area of the contact surface of the bag body with the plate-shaped member.
In said structure, the plate-shaped member which has an area wider than a bag body is arrange | positioned in the front position of a bag body. By this plate-like member, the action range of the force acting on the shoulder of the seated person as the bag body bulges is expanded as compared with the configuration using only the bag body without providing the plate-like member. Thereby, even if a bag body is reduced in size, it becomes possible to hold down a seated person's shoulder appropriately.

In the above vehicle seat, the seat back includes a plate-like member disposed at a front position of the bag body, and the bag body swells while coming into contact with the rear surface of the plate-like member. In the plate-like member, the plate-like member is deformed so that the portion corresponding to the one end portion is positioned forward of the portion corresponding to the other end portion, whereby the one end portion is more than the other end portion. Between the first part located behind one shoulder of the seated person and the second part located behind the other shoulder of the seated person in the plate-like member. It is preferable that a separation portion for separating both is formed.
In the above configuration, in the plate-like member, the first portion located behind one shoulder of the seated person and the second portion located behind the other shoulder are separated from each other with the separation portion therebetween. For this reason, each of the first part and the second part can be individually deformed. In other words, each of the shoulders of the seated person can be individually pressed. Thereby, in order to hold | maintain a seated person's attitude | position stably, it becomes possible to adjust separately the force at the time of pressing down a seated person's shoulder with respect to each of a right-and-left shoulder.

Further, in the above vehicle seat, the seat back is disposed at a plate-like member disposed at a front position of the bag body and at both ends in the width direction of the seat back, and the seated person in the width direction. A movement restricting portion for restricting movement of the plate-like member, and the plate-like member bulges while the bag is in contact with a rear surface of the plate-like member, so that the one end portion of the plate-like member A deforming portion that deforms so that a portion corresponding to the other end portion is positioned forward of the portion corresponding to the other end portion, and is positioned below the deforming portion and passes between the movement restricting portions in the width direction. An extension portion extending downward, and the extension portion is narrower than the deformation portion in the width direction, and both ends in the width direction are smaller than the movement restriction portion. If it is placed inside It is preferred.
In the above configuration, of the plate-like member extending along the vertical direction, the portion that moves to hold the shoulder of the seated person (deformation part) has a wider shape so that the shoulder can be pressed appropriately. It is said. On the other hand, the extending part located at the lower part of the deforming part has a narrower shape so as to suppress interference with the movement restricting part. As a result, it is possible to appropriately press the shoulder of the seated person through the plate member while suppressing interference between the plate member and the movement restricting portion.

Further, in the above vehicle seat, the two bag bodies are provided in a state of being aligned in the width direction, and form a path for fluid supplied to the bag body and fluid discharged from the bag body. It is preferable that the tube member is arranged so as to pass through a central portion of the seat back where a gap formed between the two bag bodies is located in the width direction.
In the above configuration, it is possible to reduce the size of the seat back by arranging the tube member using the space where the gap formed between the bags is located.

Further, in the above vehicle seat, the seat back includes a plate-like member disposed at a front position of the bag body, and the plate-like member is configured such that the bag body touches a rear surface of the plate-like member. The upper end portion is provided with a deforming portion that deforms so that the portion corresponding to the one end portion of the plate-like member is located forward of the portion corresponding to the other end portion by bulging while contacting, Of the outer edge of the deformable portion, it is preferable that the portion located at the outer end in the width direction is inclined so as to descend toward the outer side in the width direction.
In said structure, the part located in the edge part of the width direction outer side among the outer edges of a deformation | transformation part inclines so that it may fall toward the outer side supposing a general seated person's shoulder. Accordingly, the shoulder support portion of the seat back supports the seat occupant so as to wrap the shoulder, and the posture of the seat occupant is further stabilized.

Further, in the above vehicle seat, the seat back includes a plate-like member disposed at a front position of the bag body, and the plate-like member is configured such that the bag body touches a rear surface of the plate-like member. A deforming portion that deforms so that the portion corresponding to the one end portion of the plate-like member is located in front of the portion corresponding to the other end portion by bulging while being in contact with, and positioned below the deforming portion And it is suitable when it has the extension part extended toward the lower side, and the said deformation | transformation part and the said extension part are connected and integrated.
In said structure, the action range of the force which acts on a seated person's shoulder with expansion | swelling of a bag body will be expanded by a plate-shaped member. Furthermore, since the plate-like member extends downward, the range of action of the force generated by the expansion of the bag body is further expanded, and it is possible to hold down to the seated person's waist.

In the above vehicle seat, the seat back includes a seat back frame forming a skeleton of the seat back, a support plate attached to the seat back frame and supporting the bag body from the rear, and the seat back frame. And a holding portion that holds the support plate in contact with the rear surface of the support plate.
In the above configuration, since the support plate that supports the bag body is held by the holding portion, the bag body can be appropriately supported at a predetermined position.

According to the present invention, the posture of the seated person can be stably maintained by pushing the seated person's shoulder inward in the width direction by the shoulder support portion of the seat back.
In addition, according to the present invention, the posture of the seated person can be more stably maintained by suppressing the upper body of the seated person from shifting upward.
In addition, according to the present invention, the position of the seated person is supported by wrapping the shoulder of the seated person by arranging the bag body so as to be lowered toward the outside assuming the shoulder of a general seated person. Is more stable.
In addition, according to the present invention, by providing a plate-like member at the front position of the bag body, the range of the force acting on the shoulder of the seated person is increased as the bag body bulges. Even if it is changed, the seated person's shoulder can be appropriately pressed.
Further, according to the present invention, in the plate-like member, the first portion located behind one shoulder of the seated person and the second portion located behind the other shoulder are individually deformed, so that the seated person It is possible to individually adjust the force for pressing the shoulders of the left and right shoulders.
Further, according to the present invention, it is possible to appropriately hold the shoulder of the seated person through the plate-like member while suppressing the plate-like member from interfering with the movement restricting portion provided at the widthwise end portion of the seat back. It becomes.
Further, according to the present invention, it is possible to further reduce the size of the seat back by arranging the tube member using the space where the gap formed between the bags is located.
Further, according to the present invention, among the outer edges of the deformed portion located at the upper end portion of the plate-like member, the portion located at the end portion on the outer side in the width direction is inclined so as to be lowered toward the outside. As a result of supporting the seated person so as to wrap the shoulder, the posture of the seated person becomes more stable.
Further, according to the present invention, since the plate-like member extends downward, the action range of the force generated by the expansion of the bag body is further expanded, and it is possible to hold down to the seated person's waist. .
In addition, according to the present invention, the support plate that supports the bag body is held by the holding portion, so that the bag body is appropriately supported at a predetermined position.

It is a figure which shows schematic structure of the vehicle seat of this invention. It is a figure which shows the structure of the seat back frame which the vehicle seat which concerns on one Embodiment of this invention has. It is a figure of the state which removed the plate-shaped member among the seat back frames which the vehicle seat which concerns on one Embodiment of this invention has. It is explanatory drawing about the attachment position of a support plate. It is a figure which shows the AA cross section in FIG. It is a figure which shows the positional relationship of a bag body and a plate-shaped member. 7A is a view showing a cross section when the shoulder support portion of the seat back is cut along a horizontal plane, and FIG. 7B is a cross section when the shoulder support portion is cut along a vertical plane. FIG. It is a figure which shows the structure of the vehicle seat which concerns on a 1st modification. It is a figure which shows the structure of the vehicle seat which concerns on a 2nd modification. It is a figure which shows the structure of the vehicle seat which concerns on an application example. It is explanatory drawing about the mechanism which supports the knee lower part of a seated person's leg (the 1). It is explanatory drawing about the mechanism which supports the knee lower part of a seated person's leg (the 2). It is explanatory drawing about the bending state of a seated person's skeleton. It is a figure which shows an example about arrangement | positioning of the sensor for attitude | position measurement in a seat back. It is a schematic diagram which shows the DD cross section in FIG. It is a figure which shows the attachment state of the sensor for attitude | position measurement in a seat cushion. It is a block diagram which shows the structure of the system which performs correction | amendment control of a seating attitude | position. It is the schematic which shows the flow of correction | amendment control of a seating attitude | position. It is a figure which shows the procedure of the 1st control process in seating attitude | position correction | amendment control. It is a figure which shows the procedure of the 2nd control process in seating attitude | position correction | amendment control. It is a figure which shows the procedure of the 3rd control processing in seating attitude | position correction | amendment control. It is a figure which shows the example of a change of the procedure regarding a 3rd control process. It is a figure which shows the procedure of the 4th control processing in seating posture correction control. It is a figure which shows the relationship between a backside body pressure distribution and a gravity center position. It is a figure which shows the procedure of the 5th control processing in seating attitude | position correction | amendment control. It is a figure which shows the development structure of the vehicle seat which concerns on an application example. It is a figure which shows the procedure regarding adjustment processes, such as a sheet position. It is a figure which shows the correspondence of each parameter regarding a seated person's physique, and the adjustment matter regarding a sheet | seat.

  Hereinafter, a vehicle seat according to an embodiment of the present invention (this embodiment) will be described with reference to the drawings. In the following description, the “front-rear direction” corresponds to the front-rear direction of the vehicle seat and is the direction that coincides with the travel direction during vehicle travel. The “width direction” corresponds to the width direction of the vehicle seat, and specifically, is the left-right direction when the vehicle seat is viewed from the front.

  The embodiments described below are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof. In particular, the shape, material, arrangement position, and the like of each component described in the following description can be appropriately changed without departing from the gist of the present invention.

<< Schematic configuration of vehicle seat of this embodiment >>
First, with reference to FIG. 1, a schematic configuration of a vehicle seat according to the present embodiment (hereinafter, the seat S) will be described. FIG. 1 is a diagram showing a schematic configuration of the sheet S.

  The seat S is common to a conventional vehicle seat in its basic configuration (a configuration excluding a shoulder support portion described later). That is, as shown in FIG. 1, the seat S includes a seat back S1 that supports the seated person from the back side, a seat cushion S2 that supports the buttocks of the seated person, and a headrest S3 that supports the head of the seated person. ing. The seat back S1 and the seat cushion S2 are formed by placing a pad material on the frame body and then covering it with a skin material. The headrest S3 is configured by coating a pad material on the core material of the head and then covering with a skin material. The headrest S3 is supported on the upper end portion of the seat back S1 via the headrest pillar hp.

  On the other hand, the seat S is characterized by a shoulder support portion Sa1 that is a portion of the seat back S1 that supports the shoulder of the seated person. More specifically, when a seated person sits on the seat S and leans on the seat back S1, the shoulder support portion Sa1 wraps around the shoulder of the seated person and presses the shoulder. More specifically, a mechanism mounted in the shoulder support portion Sa1 operates, and the shoulder support portion Sa1 comes into contact with the shoulder of the seated person. As a result, the force indicated by the symbol F in FIG. 1 acts from the shoulder support portion Sa1 toward the shoulder of the seated person. As shown in the figure, the force F has a component toward the inner side in the width direction and a component toward the lower side. Therefore, the seated person's shoulder is pushed inward in the width direction and also pushed downward.

  As described above, both the shoulders of the seated person are supported by the shoulder support portions Sa1 of the seat back S1 and pushed inward and downward in the width direction, so that the upper body of the seated person moves in the width direction and the vertical direction. Can be suppressed. As a result, the posture of the seated person is stably maintained while seated on the seat S.

<< Internal structure of seat back >>
Next, the internal structure of the seat back S1 of the main sheet S including the shoulder support portion Sa1 described above will be described with reference to FIGS. FIG. 2 is a diagram showing a configuration of the seat back frame Sf1 in the seat back S1 of the seat S, and is a view when the seat back frame Sf1 is viewed from the front. FIG. 3 illustrates a state in which the plate member is removed from the seat back frame Sf1 illustrated in FIG. FIG. 4 illustrates a state where the support plate is removed from the upper end portion of the seat back frame Sf1, as an explanatory diagram of the mounting position of the support plate. In FIG. 4, the mounting position of the support plate is indicated by a broken line. ing. FIG. 5 is a view showing an AA cross section in FIG. 4.
2 to 5 are somewhat simplified for convenience of illustration. For example, in FIG. 5, the pillar position adjusting mechanism 6 is not shown in its internal structure. ing.

  2 and 3, a seat back frame Sf1 is provided inside the seat back S1, and various components constituting the seat back S1 are attached to the frame Sf1. The seat back frame Sf1 forms a skeleton of the seat back S1, and is a substantially rectangular frame body in a front view. More specifically, the seat back frame Sf1 connects the upper frame 1 disposed at the upper end, the pair of side frames 2 provided at both ends in the width direction, and the lower ends of the side frames 2. A lower connecting frame 3.

  The upper frame 1 is an inverted U-shaped part, and is configured by bending a metal pipe into a substantially U shape. One end of the upper frame 1 is connected to the upper end of one side frame 2, and the other end is connected to the upper end of the other side frame 2. That is, the upper frame 1 connects the upper ends of the pair of side frames 2.

  A headrest S3 is disposed above the upper frame 1. More specifically, a pillar position adjusting mechanism 6 including a pillar support portion 7 that supports the headrest pillar hp extending from the lower portion of the headrest S3 is provided behind the upper frame 1. The pillar position adjusting mechanism 6 is a mechanism for automatically adjusting the height of the headrest S3 by moving the position of the headrest pillar hp supported by the pillar support portion 7 in the vertical direction by a drive mechanism (not shown).

  In order to hold the pillar position adjusting mechanism 6, a square pipe-like holding pipe 12 extending from one end portion of the upper frame 1 toward the other end portion is attached to the upper frame 1. In the present embodiment, as shown in FIG. 4, two holding pipes 12 are provided in the vertical direction, but the number of holding pipes 12 can be arbitrarily set.

  On the other hand, as shown in FIG. 5, an attachment bracket 13 for attaching the pillar position adjusting mechanism 6 is fixed to the holding pipe 12. More specifically, the mounting bracket 13 includes a base portion 13a to which the pillar position adjusting mechanism 6 is attached, and a pair of side portions 13b extending forward from both side ends of the base portion 13a. And the attachment bracket 13 is being fixed to the holding | maintenance pipe 12 by welding the front-end | tip of each side part 13b to each rear surface of the two holding | maintenance pipes 12. FIG.

  The pair of side frames 2 are portions constituting the side surface of the seat back frame Sf1, and are spaced apart in the left-right direction so as to define the width of the seat back S1, and extend in the up-down direction. The configuration of each side frame 2 will be described. As shown in FIGS. 2 and 3, each of the side plate 2a having a flat plate shape and a front edge 2b bent inwardly in a U shape from the front end of the side plate 2a The side frame 2 is provided.

  In addition, an air cell (hereinafter referred to as a side air cell 4) is attached to a surface located on the inner side in the width direction of the surface of each side plate 2a, and the side support Sa2 is configured by the side air cell 4. This side support Sa2 is equivalent to a movement restricting portion and restricts movement of the upper body of the seated person in the width direction by enclosing air as an example of fluid in the side air cell 4 and bulging inward in the width direction. To do. In the present embodiment, the side support Sa2 is provided at both ends in the width direction of the seat back S1, and is disposed at a position that is substantially the same height as the abdomen of the seated person in the vertical direction. In addition, a tube member C1 for supplying and exhausting air is connected to the side air cell 4 constituting the side support Sa2.

  Furthermore, in the space provided between the pair of side frames 2 in the width direction, a pressure receiving plate 5 that receives pressure when the back of the seated person leans against the seat back S1 is disposed. The pressure receiving plate 5 is a resin member and is formed in a substantially T shape in a front view. Further, the upper end portion of the pressure receiving plate 5 that is formed wider is bent so that both end portions in the width direction are somewhat directed forward.

  Further, the pressure receiving plate 5 is attached to each side frame 2 with a bonding wire 5a having elasticity. More specifically, the connecting wire 5 a is installed between the pair of side frames 2, and both end portions thereof are locked to the side frames 2. The central portion of the coupling wire 5 a is hung on a hook portion (not shown) formed on the back surface of the pressure receiving plate 5. As a result, the pressure receiving plate 5 is disposed in a space provided between the pair of side frames 2.

  Then, when pressure is applied to the front surface of the pressure receiving plate 5 by the seated person's back leaning on the seat back S1, the elastic coupling wire 5a is bent and the pressure receiving plate 5 moves rearward. As a result, the upper body of the seated person sinks moderately toward the rear. In addition, about the shape of the pressure receiving plate 5, it is not limited to what was described in FIG. 3 etc., Other shapes may be sufficient.

  By the way, the seat back S1 according to the present embodiment is characterized in that it includes the shoulder support portion Sa1 that supports the seated person so as to wrap the shoulder. And the internal structure of shoulder support part Sa1 which concerns on this embodiment is provided with the air cell 10 illustrated in FIG. 3, and the resin plate 20 illustrated in FIG.

  The air cell 10 is a bag body that swells when air, which is an example of a fluid, is sealed inside, and is provided in two in the width direction as shown in FIG. If it demonstrates concretely, the external shape of each air cell 10 will be a rectangular shape by which the one end side became a semicircle by the front view. However, the outer shape of the air cell 10 is not particularly limited as long as the shape is longer in a predetermined direction. Moreover, in this embodiment, although the air cell 10 which swells when air is enclosed is used as an example of the bag body, a bag body which swells when a fluid other than air, for example, a liquid is sealed, is used. It is also possible to use.

  Further, the two air cells 10 are positioned immediately above the pressure receiving plate 5 in the vertical direction, and are provided in a posture in which the longitudinal direction is slightly inclined with respect to the width direction. Here, of the longitudinal ends of each air cell 10, the end on the outer side in the width direction is outside the side end of the seat back frame Sf1 (strictly speaking, the side end of the upper frame 1) as shown in FIG. It is in a position that protrudes somewhat.

  Furthermore, as shown in FIG. 3, each air cell 10 is provided such that an end on the outer side in the width direction is positioned below an end on the inner side in the width direction among both ends in the longitudinal direction. Furthermore, a gap is formed between the two air cells 10 in the width direction, but the gap is located at the center in the width direction of the seat back S1, as shown in FIG.

  And in order to arrange | position the two air cells 10 in the above-mentioned position, the support plate 11 is attached to seat back frame Sf1. The support plate 11 is a metal plate that is long in the width direction, and supports each of the two air cells 10 from the rear. Further, both end portions of the support plate 11 reach the side ends of the seat back frame Sf1, and are further bent rearward.

  Each of the two air cells 10 is supported by being attached to the front surface of the support plate 11. Specifically, the center portion in the longitudinal direction of each air cell 10 is fastened to the support plate 11. In addition, a tongue-like protrusion (not shown) is provided at an end on the outer side in the width direction of both ends in the longitudinal direction of each air cell 10, and the tongue-like protrusion is along the side edge of the support plate 11. It is bent backward and is screwed to the side end.

  On the other hand, the support plate 11 is attached to the front surface of the seat back frame Sf <b> 1 so as to be positioned at substantially the same height as the joint portion between the upper frame 1 and the side frame 2 in the vertical direction. The mounting position of the support plate 11 will be specifically described with reference to FIGS. 4 and 5. The support plate 11 has two holding pipes 12 provided to hold the pillar position adjusting mechanism 6 on the rear surface. Are fixed to each holding pipe 12 by welding. That is, in the present embodiment, the holding pipe 12 functions as a holding portion that holds the support plate 11 by contacting the rear surface of the support plate 11.

  As described above, the support plate 11 is held by the holding pipe 12 at the rear thereof, so that the support plate 11 can be appropriately held without interfering with the air cell 10. As a result, each air cell 10 supported by the support plate 11 continues to be satisfactorily positioned at a predetermined mounting position. In the present embodiment, the support plate 11 is held by the holding pipe 12 provided to hold the pillar position adjusting mechanism 6. That is, in this embodiment, since the member for holding the pillar position adjusting mechanism 6 is also used as the member for holding the support plate 11, the support rigidity of the support plate 11 can be improved efficiently.

  Incidentally, a tube member C2 is connected to each air cell 10 as shown in FIG. The tube member C <b> 2 forms a path for air supplied to the air cell 10 and air discharged from the air cell 10, has flexibility, and is provided for each air cell 10.

  Each tube member C <b> 2 passes through the rear of the pressure receiving plate 5 to reach the upper end of the pressure receiving plate 5, and further extends from the upper side of the pressure receiving plate 5 to the front side and is connected to each air cell 10. Here, each tube member C2 is routed so as to pass through a central portion of the seat back S1 where a gap formed between the two air cells 10 is positioned in the width direction.

  More specifically, the tube member C2 provided for each air cell 10 extends from a compressed air supply source (specifically, a compressor 52 described later), and passes toward the air cell 10 through the rear of the pressure receiving plate 5. Yes. In addition, each tube member C2 extends from the side of the seat back frame Sf1 toward the center in the width direction of the pressure receiving plate 5 when passing through the rear of the pressure receiving plate 5, and is attached to the rear surface of the pressure receiving plate 5 at an intermediate position. It is bundled with a clip (not shown). In each tube member C2, the portion from the center in the width direction of the pressure receiving plate 5 to the connection to the air cell 10 extends so as to pass through the center in the width direction of the seat back frame Sf1.

  As described above, in the present embodiment, each tube member C2 is routed so as to pass through the center portion in the width direction of the seat back S1 where the gap between the air cells 10 is located. Thereby, since the space in which the gap between the air cells 10 is located is effectively used, the seat back S1 can be further downsized in the seat S.

  The resin plate 20 is a plate-like member disposed at the front position of the two air cells 10. This resin plate 20 is provided in order to expand the action range of the force acting on the shoulder of the seated person as the air cell 10 bulges, and has an outer shape that is long in the vertical direction when viewed from the front. More specifically, as shown in FIG. 2, the resin plate 20 is deformed as the air cell 10 bulges, and the resin plate 20 is positioned below the deforming portion 21 and extends downward. The extended portion 22. The deformable portion 21 and the extending portion 22 are adjacent to each other, and a groove 23 formed linearly along the width direction is provided at the boundary position. Further, a substantially triangular notch 20a is formed at both ends in the width direction of the resin plate 20 in the region where the groove 23 is formed.

  The deformation portion 21 is disposed at the upper end portion of the resin plate 20 and has a substantially hexagonal shape when viewed from the front. At the center in the width direction of the deformable portion 21, an inverted triangular notch 24 is formed downward from the upper end, and the tip of the notch 24 is slightly below the vertical center position of the deformable portion 21. Is located. And the deformation | transformation part 21 is isolate | separated into two parts (specifically, the one end side deformation part piece 25 and the other end side deformation part piece 26) on the notch 24 as a boundary, A certain one end side deformable piece 25 and the other end side deformable piece 26 can be individually deformed. In other words, the notch 24 is formed between the two deformable pieces 25 and 26 and corresponds to a separating portion for separating the two deformable pieces 25 and 26.

  Here, the one-end-side deformable piece 25 and the other-end-side deformable piece 26 are positioned behind the seated person's shoulder when the seated person's back leans against the seat back S1. More precisely, the one end side deformable piece 25 corresponds to a first portion located behind one shoulder of the seated person, and the other end side deformed piece 26 is located behind the other shoulder of the seated person. It corresponds to the second part located.

  And each of the one end side deformation part piece 25 and the other end side deformation part piece 26 is located immediately before the corresponding air cell 10, and when the corresponding air cell 10 bulges out, it wraps around the seated person's shoulder. Deforms while curving. As a result, the shoulder support portion Sa1 of the seat back S1 can press the shoulder of the seated person, thereby stably holding the seated person's posture.

  The air cell 10 abuts against the rear surfaces of the corresponding deformable pieces 25 and 26 and bulges in this state. Then, when the air cell 10 swells, a force acts on the shoulder of the seated person from the air cell 10. At this time, since the action range of the force is expanded by the deforming portion 21, the seated person's shoulder is pushed over a wide range.

  That is, the area of the front surface of each of the deformable pieces 25 and 26 of the deformable portion 21 is larger than the area of the contact surface of the air cell 10 with each of the deformable pieces 25 and 26. For this reason, the force generated by the bulging of the air cell 10 reaches a wider range with respect to the shoulder of the seated person. Thus, if the range of the force generated by the expansion of the air cell 10 is expanded by the resin plate 20, it is possible to appropriately hold the shoulder of the seated person even when the relatively small air cell 10 is used. It becomes. In particular, in the present embodiment, in the resin plate 20, the deformable portion 21 is wider than other portions (specifically, the extended portion 22), and the range of the force generated by the expansion of the air cell 10 is reduced. It is easier to expand.

  Furthermore, in this embodiment, as described above, each of the one end side deformable piece 25 and the other end side deformable piece 26 can be individually deformed. Thereby, in this seat S, it becomes possible to hold down each of a seated person's shoulders individually, and as a result, in order to hold a seated person's posture stably, the power at the time of pushing down a seated person's shoulder, It is possible to individually adjust the left and right shoulders.

  In addition, in each deformation | transformation piece 25 and 26, the center part of the up-down direction is the widest, and the said center part is located in front of the air cell 10 as shown in FIG. Further, of the two longitudinal ends of each air cell 10, the end on the outer side in the width direction is at a position slightly protruding outward from the corresponding deformable piece 25, 26 as shown in FIG. 2. Furthermore, the part located in the edge part of the width direction outer side among the outer edges of each deformation | transformation part piece 25 and 26 makes a substantially arc-shaped curve imitating a seated person's shoulder, and descends as it goes to the width direction outer side. So as to be inclined.

  The extending part 22 is a part extending from the central part in the vertical direction of the resin plate 20 to the lower end part. The extension portion 22 (strictly, the lower end portion of the extension portion 22) is located behind the waist of the seated person when the back of the seated person leans against the seat back S1. Moreover, in this sheet | seat S, the deformation | transformation part 21 and the extension part 22 are connected and integrated, and, specifically, it is an integrally molded product. Thereby, when the air cell 10 bulges, the action range of the force acting on the shoulder of the seated person is expanded accordingly, and it is possible to hold down to the waist of the seated person. In the present embodiment, the extending portion 22 is slightly curved with respect to the vertical direction and has an arcuate shape. For this reason, when pushing a seated person's waist ahead by the extension part 22, it becomes possible to push a seated person's waist suitably with a comparatively gentle surface.

  Further, as shown in FIG. 2, the extending portion 22 is narrower than the deformable portion 21, and the gap between the pair of side supports Sa <b> 2 provided at both ends in the width direction of the seat back S <b> 1 (more strictly, Is narrower than the side air cell 4). Moreover, when installing the resin plate 20, the extension part 22 is arrange | positioned so that it may pass between left-right paired side support Sa2 in the width direction. Thereby, in this sheet | seat S, it becomes possible to hold | suppress a seated person's shoulder and a waist appropriately through the resin plate 20, suppressing the interference with the resin plate 20 and side support Sa2.

<< Positional relationship between air cell 10 and resin plate 20 >>
Each air cell 10 is located behind the deformed portion 21 of the resin plate 20. More specifically, each air cell 10 is located behind the corresponding deformable piece 25, 26. Specifically, one air cell 10 is located immediately behind the one end side deformable piece 25 and the other air cell 10 is located immediately behind the other end side deformable piece 26. Each air cell 10 swells while abutting against the rear surfaces of the corresponding deformable pieces 25 and 26. Thereby, each deformation | transformation piece 25,26 deform | transforms and comes to hold | suppress so that shoulder support part Sa1 in seat back S1 may wrap a shoulder of a seated person.

And in this sheet | seat S, in order to implement | achieve the resin plate 20 deform | transforming so that a seated person's shoulder may be wrapped by the swelling of the air cell 10, the positional relationship of each air cell 10 and the resin plate 20 is adjusted. . Hereinafter, the positional relationship between each air cell 10 and the resin plate 20 will be described with reference to FIG. FIG. 6 is a diagram showing the positional relationship between the air cell 10 and the resin plate 20, and only the air cell 10 and the resin plate 20 are shown in the drawing for easy understanding.
In addition, about the positional relationship of the one end side deformation | transformation piece 25 and the air cell 10, since the positional relationship of the other end side deformation | transformation piece 26 and the air cell 10 is reversed right and left, in the following description, one end side deformation | transformation part is demonstrated. Only the positional relationship between the piece 25 and the air cell 10 will be described.

  As shown in FIG. 6, the center position of the air cell 10 is located above the center position of the one end side deformable piece 25 and on the outer side in the width direction. Here, the center position of the air cell 10 is the center of the air cell 10 in the longitudinal direction and the center of the air cell 10 in the height direction. The center position of the one end side deformable piece 25 is the center in the width direction of the one end side deformable piece 25 and the center in the vertical direction of the one end side deformable piece 25. One end in the width direction of the one-end-side deformable piece 25 corresponds to a part located on the outermost side in the one-end-side deformable piece 25, and the other end in the width-direction of the one-end-side deformable piece 25 is as described above. This corresponds to the tip position of the notch 24 (in other words, the center position in the width direction of the deformable portion 21).

  The above-described tube member C2 for supply / exhaust is connected to a location that substantially coincides with the center position of the air cell 10 in a front view. Therefore, the air cell 10 starts to bulge preferentially from the center position. For this reason, when the air cell 10 bulges, the portion located on the outer side in the width direction in the one end side deformable piece 25 is selectively deformed. That is, the one end side deformable piece 25 is deformed so that the portion located outside in the width direction is located in front of the portion located inside in the width direction.

As shown in FIG. 7A, when the one end side deformable piece 25 is deformed as described above, one end portion on the outer side in the width direction is the inner side in the width direction among the shoulder support portions Sa1 included in the seat back S1. It moves to the front rather than the other end part. As a result, a force inward in the width direction acts on the shoulder of the seated person from the seat back S1, and the shoulder of the seated person is pushed inward in the width direction by the shoulder support portion Sa1. As a result, it is possible to suppress the upper body of the seated person from shifting in the width direction, and the posture of the seated person can be stably maintained.
Incidentally, FIG. 7A is a view showing a state in which the shoulder support portion Sa1 of the seat back S1 supports the shoulder of the seated person, and shows a cross section when the shoulder support portion Sa1 is cut along a horizontal plane. It is a figure.

  In addition, the part located in the width direction outer side in the one end side deformation part piece 25 is equivalent to the part corresponding to the one end part in the width direction outer side in the shoulder support part Sa1, and is located in the width direction inner side in the one end side deformation part piece 25. The portion to correspond corresponds to a portion corresponding to one end portion on the inner side in the width direction in the shoulder support portion Sa1.

  Further, when the air cell 10 swells, as described above, the portion located on the outer side in the width direction in the one-end-side deformable piece 25 is selectively deformed. In particular, the upper region of the portion is more than the lower region. Is also deformed so as to be positioned forward. This is because the center position of the air cell 10 having the air supply / exhaust port is located above the center position of the one end side deformable piece 25.

And the one end side deformation | transformation part piece 25 deform | transforms as mentioned above, and as shown to (B) of FIG. 7, the other end which exists in the width direction inner side among shoulder support parts Sa1 is the width direction inner side. When moving forward from the end, the upper part in the one end moves forward from the lower part. Thereby, about the force which acts on a seated person's shoulder from seat back S1, it comes to have the component which goes to the width direction inner side, and the component which goes to the downward direction. Therefore, the seated person's shoulder is pushed inward in the width direction and also pushed downward. As a result, it is possible to suppress the upper body of the seated person from moving upward and hold the seated person's posture more stably.
Incidentally, FIG. 7B is a view showing a state where the shoulder support portion Sa1 of the seat back S1 supports the shoulder of the seated person, and a cross section when the shoulder support portion Sa1 is cut along a vertical plane. FIG.

  In the present embodiment, the arrangement of the air cell 10 is set to a suitable one for the purpose of promoting the selective deformation of the width direction outer side portion of the one end side deformable piece 25 when the air cell 10 bulges. . Specifically, each air cell 10 is arranged such that, of its both ends in the longitudinal direction, the end on the outer side in the width direction is positioned below the end on the inner side in the width direction. This is a content that assumes the shoulder of a general seated person, and the shoulder support portion of the seat back S1 is arranged by the air cell 10 being disposed so as to descend outward in the width direction like the shoulder of the seated person. Sa1 will be supported so as to wrap the shoulder of the seated person. As a result, the posture of the seated person sitting on the seat S is further stabilized.

  In this embodiment, as shown in FIGS. 2 and 6, the end on the outer side in the width direction of the air cell 10 protrudes somewhat outside the end on the outer side in the width direction of the one-end-side deformable piece 25. . With such an arrangement, the widthwise outer portion of the one end side deformable piece 25 is more likely to be deformed, so that it is easy to stabilize the posture of the seated person.

  In the present embodiment, as shown in FIG. 6, most of the air cell 10 is located between the upper end position of the one end side deformable piece 25 and the vertical center position when viewed from the front. . With such an arrangement, when the portion located on the outer side in the width direction of the one-end-side deformable piece 25 is deformed, the upper region is easily deformed so as to be located in front of the lower region. It becomes easier to stabilize the posture.

  Furthermore, in this embodiment, the shape of the resin plate 20 is set to a suitable shape for the purpose of assisting the shoulder support portion Sa1 of the seat back S1 to wrap and support the shoulder of the seated person. Specifically, of the outer edges of the deformable pieces 25 and 26 provided on the deformable portion 21 of the resin plate 20, the portion located at the outer end in the width direction is similar to the shoulder of the seated person. It is inclined to descend as it goes outward in the direction. As described above, the portion of the resin plate 20 located behind the shoulder of the seated person has a shape imitating the shoulder of the seated person, so that the shoulder support portion Sa1 supports the shoulder of the seated person. The effect is exhibited more effectively. As a result, the posture of the seated person sitting on the seat S is further stabilized.

<< Variation of Air Cell Holding >>
In the above embodiment, the support plate 11 that supports the air cell 10 from the rear is provided. Further, in the above embodiment, the support plate 11 is held by the square cylindrical holding pipe 12 attached to the seat back frame Sf1 in order to hold the pillar position adjusting mechanism 6. However, the configuration for holding the air cell 10 is not limited to the above embodiment, and other embodiments are also conceivable. Hereinafter, a modified example related to holding the air cell 10 will be described with reference to FIGS. FIGS. 8 and 9 are views showing a configuration of a vehicle seat according to a modification, and in each drawing, a seat back frame Sf1 in which the configuration for holding the air cell 10 is different from that of the above-described embodiment is illustrated.

  First, the first modification shown in FIG. 8 will be described. Instead of providing the holding pipe 12, a rod-like member 14 made of a metal member having relatively high rigidity is used. The rod-like members 14 extend downward from the horizontal portion of the upper frame 1 and are provided as a pair with a space left and right. The upper end portion of each rod-like member 14 is fixed to the upper frame 1, and the lower end portion is fastened to a locking portion (not shown) provided on the rear surface of the pressure receiving plate 5.

  Further, an elastic wire 15 is stretched between the rod-shaped members 14 along the width direction. A plurality of the wires 15 are arranged side by side at a constant pitch in the vertical direction. And in the 1st modification, the support plate 11 is attached to the front surface of these some wires 15, and specifically, it is attached to the attachment position shown with the broken line in FIG.

  Next, the second modification shown in FIG. 9 will be described. Instead of providing the support plate 11 and the holding pipe 12, a modified pressure receiving plate 16 is provided. The pressure receiving plate 16 is somewhat expanded above the pressure receiving plate 5 used in the above-described embodiment. Further, in a state where the pressure receiving plate 16 according to the modification is attached to the seat back frame Sf1, the upper end thereof is located somewhat above the position where the air cell 10 is disposed.

  In the second modified example, as shown in FIG. 9, the air cell 10 is attached to the upper end portion of the pressure receiving plate 16 according to the modified example instead of the support plate 11. Specifically, in FIG. It is attached to the attachment position shown by. With such a configuration, the number of components is reduced by not using the support plate 11, and the assembly work of the seat back frame Sf1 is further simplified.

<< Regarding Application Examples of the Present Invention >>
In the vehicle seat described above, the shoulder support portion Sa1 of the seat back S1 wraps and supports the shoulder of the seated person when the seated person sits down. By applying this configuration, it is possible to realize a vehicle seat (hereinafter referred to as application seat XS) that corrects the posture of the seated person at the time of sitting. Hereinafter, the configuration and the like of the application sheet XS as an application example of the present invention will be described.

First, the basic configuration of the application sheet XS will be described with reference to FIG. FIG. 10 is a diagram illustrating a basic configuration of the application sheet XS.
The application seat XS follows the configuration of the vehicle seat (that is, the main seat S) according to the above-described embodiment. Specifically, the seat back XS1 includes a shoulder support corresponding to the shoulder support portion Sa1. Xa1 is provided. The shoulder support Xa1 incorporates an air cell 10 and has a function of pushing the shoulder of the seated person inward in the width direction and downward as the air cell 10 bulges.

  The application sheet XS includes side supports Xa2 at both ends in the width direction of the seat back XS1. The side support Xa2 has the same configuration as the side support Sa2 provided in the vehicle seat according to the above-described embodiment. That is, the side support Xa2 provided in the application seat XS includes an air cell (side air cell 4), and pushes the upper body of the seated person in the width direction by the bulging of the side air cell 4.

  And the application sheet | seat XS has the site | part which incorporates the air cell other than the shoulder support Xa1 and the side support Xa2. More specifically, as shown in FIG. 10, a lumbar support Xa3 is provided in a portion of the seat back XS1 that contacts the waist of the seated person. The lumbar support Xa3 has a built-in lumbar air cell 8 and pushes the seated person's waist forward by the bulging of the lumbar air cell 8.

  Further, cushion side supports Xa4 are provided at both ends in the width direction of the seat cushion XS2 of the application seat XS. This cushion side support Xa4 incorporates a side air cell for cushioning (hereinafter referred to as cushion air cell 9), and pushes the thigh of the seated person inward in the width direction by the bulging of the cushion air cell 9.

  Furthermore, an ottoman portion Xa5 is provided at the front end portion of the seat XS2 of the application seat XS as a lower knee support portion that supports the lower knee portion of the leg of the seated person. The ottoman portion Xa5 includes an air cell (the ottoman air cell 30) disposed at the front end of the seat cushion XS2, and supports the lower knee portion of the seated person's leg from below when the ottoman air cell 30 bulges out. It becomes like this.

Here, when the lower part of the leg of the seated person is placed on the ottoman air cell 30 to support the lower part of the occupant's leg, the lower part of the ottoman air cell 30 swells between the part on which the lower part of the knee rests and the other part. There will be a difference in quantity. As a result, the force that supports the lower knee of the leg of the seated person is not stable, and the lower knee cannot be properly supported.
Therefore, in the ottoman portion Xa5 of the application sheet XS, as shown in FIGS. 11 and 12, a belt-like support member 31 is disposed in front of the ottoman air cell 30. 11 and 12 are explanatory views of the ottoman portion Xa5 that supports the lower knee portion of the leg of the seated person, and is a view when the front end portion of the cushion frame Xf2 constituting the seat cushion XS2 is viewed from the side.

  The support member 31 is attached to the front end portion of the seat XS2 of the application sheet XS, and is constituted by a plurality of connected support pieces 31a. Each support piece 31a is made of a substantially strip-shaped metal plate that is long in the width direction. Further, in the support member 31, the support pieces 31a adjacent to each other are connected via a hinge so that one support piece 31a can be rotated relative to the other support piece 31a.

  Then, when the ottoman air cell 30 bulges, the support member 31 faces the support position (the position of the support member 31 shown in FIG. 12) that supports the lower knee of the seated person's leg on the front surface of each support piece 31a. Move. On the other hand, when the ottoman air cell 30 contracts, the support member 31 moves toward a standby position (position of the support member 31 illustrated in FIG. 11) that waits in a state of hanging downward in front of the seat cushion XS2.

  In the case of the ottoman portion Xa5 configured as described above, when the lower part of the leg of the seated person is supported by the bulging of the ottoman air cell 30, it is supported on a flat surface, more specifically, on the front surface of the support piece 31a. It becomes possible to do. As a result, it is possible to satisfactorily maintain the state of stably supporting the lower knee of the leg of the seated person.

<< Arrangement of sensors in application sheet XS >>
As described above, the application sheet XS includes a plurality of movable parts with built-in air cells. And when a seated person sits on the application sheet XS, each movable part will operate | move automatically. Thereby, the back side part and thigh of the seated person's body are pressed, and the seated person's posture is corrected. In other words, by sitting on the application sheet XS, the bending state of the skeleton of the seated person is actively corrected. Here, the bending state of the skeleton is an index related to the three-dimensional structure of the skeleton such as the shape of the skeleton, the displacement and distortion of the skeleton, and in this embodiment, as shown in FIG. The curvature of the arc shape formed by the regions A to G) corresponds to a bent state. FIG. 13 is an explanatory diagram of the bent state of the skeleton of the seated person.

  In correcting the posture of the seated person with the application sheet XS, it is necessary to sense the initial posture of the seated person, in other words, the initial bending state of the skeleton. For this reason, a posture measurement sensor is disposed on each of the seat back XS1 and the seat cushion XS2 of the application seat XS. Hereinafter, the arrangement of the posture measuring sensor will be described with reference to FIGS. FIG. 14 is a diagram illustrating an example of the arrangement of posture measuring sensors in the seat back XS1. FIG. 15 is a schematic view showing a DD cross section in FIG. 14. FIG. 16 is a diagram illustrating a state in which the posture measurement sensor is attached to the seat cushion XS2, and is a schematic diagram illustrating a cross section when the seat cushion XS2 is cut along a vertical plane.

  In the application sheet XS, the shape sensor 40 illustrated in FIG. 14 is used as one of the posture measurement sensors. The shape sensor 40 is made of a shape sensing optical fiber and has flexibility. The shape sensor 40 detects the posture of the seated person by bending along the curved shape of the seated person's skeleton. More specifically, when the shape sensor 40 bends along the back side portion of the body of the seated person seated on the application sheet XS, the refractive index of light in each part of the shape sensor 40 changes. On the other hand, the shape sensor 40 is connected to a circuit board (not shown) via a connector, a cable, or the like, and outputs a signal corresponding to a change in the refractive index of light to the circuit board. Then, on the circuit board, a three-dimensional shape such as twist or bend of the shape sensor 40 is specified based on an output signal from the shape sensor 40, and the posture of the seated person is determined from the specification result.

  In addition, the shape sensor 40 is arrange | positioned at the center part of the width direction of the application sheet XS as shown in FIG. 14 so that it may be bent appropriately along a skeleton (for example, spine) of a seated person.

  In addition, in the seat back XS1 of the application seat XS, a body pressure sensor 41 as another posture measurement sensor is used in addition to the shape sensor 40 described above. The body pressure sensor 41 has a substantially strip-shaped film shape, and includes a detection unit 41a as a sensor body and a transmission path 41b formed to transmit an output signal from the detection unit 41a. The detection unit 41a detects the pressure (body pressure) applied when the seated person is seated on the application seat XS, and outputs a signal corresponding to the magnitude of the body pressure. The transmission path 41b is routed from the front surface to the rear surface of the seat back XS1.

  The body pressure sensor 41 is disposed at a position avoiding the shape sensor 40 in the width direction. More specifically, as shown in FIG. It is provided side by side. More specifically, the body pressure sensor 41 is disposed at a position where the body pressure distribution in the vicinity of the seated person's shoulder, the entire back area, and the waist can be measured.

  By the way, each body pressure sensor 41 is interposed between the pad material XP1 constituting the seat back XS1 and the skin material. On the other hand, the pad material XP1 is made of urethane, for example, and has a flat portion Pa1 at the center in the width direction and a raised portion Pb1 at both ends in the width direction, as shown in FIG. Further, a suspending groove Pc1 for suspending the skin material is formed between the flat portion Pa1 and the raised portion Pb1 along the height direction of the pad material XP1 (vertical direction of the sheet).

  As described above, the transmission path 41b of the body pressure sensor 41 is routed from the front surface to the rear surface of the seat back XS1, but the routing path is naturally as short as possible. Is desirable. On the other hand, the routing path of the transmission path 41b needs to be set to a path that suppresses the uncomfortable feeling felt by the seated person as a result of the transmission path 41b being provided.

  Therefore, in the application sheet XS, holes penetrating to the rear surface of the pad material XP1 are formed in several places in the hanging groove Pc1, and the transmission path 41b is directed toward the rear surface of the pad material XP1 through the holes as shown in FIG. Trying to turn. Thereby, the discomfort felt by the seated person due to the provision of the transmission path 41b is reduced. In addition, about the position in which the said hole is formed in the hanging groove Pc1, it is suitable if it is determined according to the installation position of the body pressure sensor 41, for example, in the position adjacent to the body pressure sensor 41. There should be.

  The arrangement of the sensors in the seat cushion XS2 of the applied seat XS will be described. In the seat cushion XS2, a capacitance sensor 42 as another posture measurement sensor is used in addition to the shape sensor 40 described above. The capacitance sensor 42 is routed toward the lower surface of the seat cushion XS2. For this reason, as shown in FIG. 16, the pad material XP2 constituting the seat cushion XS2 is formed with a hole leading to the lower surface, and the capacitance sensor 42 is directed toward the lower surface of the seat cushion XS2 through the hole. I'm going around.

  On the other hand, in order to attach the electrostatic capacity sensor 42 to the seat cushion XS2, the electrostatic capacity sensor 42 is usually attached to the upper surface of the pad material XP2. However, in this attachment method, an excessive load is applied to the electrostatic capacity sensor 42 when seated. May damage the sensor. In addition, since the electrostatic capacity sensor 42 is on the upper surface of the pad material XP2, there may be a case where the seated person seated on the seat feels uncomfortable. Further, when a component such as a heater is installed on the surface of the pad material XP2, the installation range of the component is limited by the installation of the capacitance sensor 42.

  Therefore, in the application sheet XS, as shown in FIG. 16, the capacitance sensor 42 is embedded in the pad material XP2. More specifically, after the lower portion of the pad material XP2 is formed, the capacitance sensor 42 is attached to the surface (upper surface) of the portion, and then the upper portion of the pad material XP2 is formed. With such a configuration, in the application sheet XS, problems associated with attaching the capacitance sensor 42 to the upper surface of the pad material XP2 are eliminated.

  In order to form the upper portion of the pad material XP2 after the capacitance sensor 42 is attached, the upper portion of the pad material XP2 is prepared as a separate part, and after the capacitance sensor 42 is attached, the pad material XP2 is prepared. It is good to stick the upper part as a separate part to the lower part. Alternatively, the lower part of the pad material XP2 in a state where the capacitance sensor 42 is pasted is reintroduced into a mold (not shown), and the upper part of the pad material XP2 is molded in the manner of insert molding, that is, the pad The material XP2 may be integrally formed.

  The posture measurement sensor described so far is mounted on the application sheet XS. For example, when a seated person is seated, posture measurement by the sensor is automatically started. Further, the application seat XS is provided with one weight sensor for measuring the weight of the seated person on the front, rear, left and right. The weight measurement by the weight sensor is executed simultaneously with the posture measurement.

<< About the correction control of the sitting posture >>
The application sheet XS can correct the posture of the seated person (in other words, the bending state of the skeleton) by the configuration described above. Hereinafter, the seating posture correction control by the application sheet XS will be described in detail.

(Control configuration)
First, the configuration of a system that executes seating posture correction control will be described with reference to FIG. FIG. 17 is a block diagram illustrating a configuration of a system that executes seating posture correction control.
As shown in FIG. 17, the system for executing the seating posture correction control (hereinafter referred to as control system CS) includes the above-described sensor group, the controller 50, a movable part with a built-in air cell mounted on the application seat XS, And a drive mechanism for driving the unit. Here, the movable parts are the shoulder support Xa1, the side support Xa2, the lumbar support Xa3, the cushion side support Xa4, and the ottoman part Xa5 described above.

The control system CS further includes a pillar position adjustment mechanism 51. The pillar position adjusting mechanism 51 is mounted on the application sheet XS and adjusts the position of the headrest pillar hp in the vertical direction and the front-rear direction. Then, the pillar position adjusting mechanism 51 adjusts the position of the headrest pillar hp, so that the position of the headrest XS3 varies in the vertical direction and the front-rear direction.
Further, the control system CS further includes a tilt mechanism 55. This tilt mechanism 55 is mounted on the seat cushion XS2 of the application seat XS, in particular, the cushion front end portion that supports the thigh of the seated person, and adjusts the seating surface angle of the front end portion.

  The sensor group includes a posture measurement sensor and a weight sensor mounted on the application sheet XS. With this sensor group, for a seated person seated on the application sheet XS, the bending state of the skeleton, the pressure distribution near the shoulder, the pressure distribution in each part of the back, the pressure distribution near the waist, the pressure distribution in the range from the hip to the back of the knee, It is possible to measure body weight.

  The controller 50 comprises an ECU (Electronic Control Unit) mounted on the vehicle, receives output signals from each sensor, and calculates various index values related to the posture of the seated person. For example, the controller 50 calculates the position of the center of gravity of the seated person from the measurement result regarding the pressure distribution on the back.

  Moreover, the controller 50 controls the movable part built in the air cell and the pillar position adjusting mechanism 51 mounted on the application sheet XS based on the calculated value. If it demonstrates concretely, the movable part with a built-in air cell will operate | move by operation | movement of a drive mechanism. Here, the drive mechanism is provided in the compressor 52, the air supply path 53 (specifically, the path formed by the above-described tube members C <b> 1 and C <b> 2) connected to the compressor 52, and the air supply path 53. And an electromagnetic valve 54. The air supply path 53 is provided for each air cell, and the end of each air supply path 53 is connected to each air cell. The electromagnetic valve 54 is also provided for each air cell (that is, for each air supply path 53).

  The controller 50 controls the bulging amount of each air cell by controlling on / off of the compressor 52 and opening / closing of the electromagnetic valve 54. In addition, the controller 50 controls the pillar position adjusting mechanism 51 so that the headrest pillar hp reaches the target position by performing on / off control of a driving mechanism (not shown) mounted in the pillar position adjusting mechanism 51. Further, the controller 50 controls the tilt mechanism 55 so that the seating surface angle of the front end portion of the seat cushion XS2 becomes a predetermined angle by performing on / off control of a drive mechanism (not shown) mounted in the tilt mechanism 55.

(Flow of seating posture correction control)
Next, the flow of the seating posture correction control will be described with reference to FIG. FIG. 18 is a schematic diagram showing the flow of the seating posture correction control.
As shown in FIG. 18, the seating posture correction control proceeds in the order of cushion side control processing S001, waist control processing S002, shoulder control processing S003, and headrest position control processing S004. Hereinafter, each control process will be described individually.

(1) Cushion side control processing S001
The cushion side control process S001 is a control process for optimizing the pressure distribution in the range from the buttocks to the back of the knee (hereinafter referred to as a seating surface pressure distribution optimizing process), and a control for moving the centroid position of the seated person to a normal position. It is divided into processing (hereinafter, center of gravity correction processing).

The seat pressure distribution optimization process will be described. This process is executed according to the procedure shown in FIG. FIG. 19 is a diagram illustrating a procedure of the seating surface pressure optimization process.
The seating surface pressure distribution optimization process starts from measuring the seating surface pressure distribution, that is, the pressure distribution in the range from the buttocks to the back of the knee when the seated person sits on the application sheet XS (S011). After the measurement, the controller 50 calculates an index value of the seat pressure distribution (S012). The index value of the seating surface pressure distribution is not particularly limited, but will be described with an example. The maximum pressure and the minimum pressure in the measured seating surface pressure distribution are specified, and the difference between the two pressures is calculated.

  Thereafter, the controller 50 controls the tilt mechanism 55 so that the seating surface angle of the front end portion of the seat cushion XS2 changes by a predetermined amount (S013). Then, for the step S011 for measuring the seating surface pressure distribution, the step S012 for calculating the difference between the maximum pressure and the minimum pressure in the seating surface pressure distribution, and the step S013 for controlling the tilt mechanism 55, the above difference is minimum. It is repeated to become. Finally, when the above difference becomes minimum (S014), the seating surface pressure distribution optimization process is completed.

Next, the center of gravity correction process will be described. The center of gravity correction process is executed according to the procedure shown in FIG. FIG. 20 is a diagram illustrating the procedure of the gravity center correction process.
Specifically, the center-of-gravity correction process starts from measuring the seating surface pressure distribution when the seated person is seated on the application seat XS (S021). After the measurement, the controller 50 calculates the bearing surface pressure balance, in other words, the shift amount of the center of gravity from the measurement result (S022).

  The procedure for calculating the amount of deviation of the center of gravity from the measurement result of the seating surface pressure distribution is not particularly limited, but as an example, the measured seating surface pressure distribution is represented by the center position in the seat width direction. After dividing the boundary into left and right, the average value of the left pressure distribution and the average value of the right pressure distribution are calculated. Then, the difference between the two calculated average values is calculated as the shift amount of the center of gravity.

  After calculating the deviation amount of the center of gravity, the controller 50 controls the compressor 52 and the electromagnetic valve 54 so that the air cell (cushion air cell 9) of the cushion side support Xa4 bulges by a predetermined amount (S023). Then, the step S021 for measuring the seating surface pressure distribution, the step S022 for calculating the displacement amount of the center of gravity, and the step S023 of operating the cushion side support Xa4 are performed until the displacement amount of the center of gravity disappears. Repeat until left and right symmetry. Finally, when the deviation amount of the center of gravity disappears (S024), the center of gravity correction process is completed.

(2) Lumbar control process S002
The waist control process S002 includes a control process for optimizing the body pressure distribution on the back side of the seated person (hereinafter referred to as body pressure distribution optimizing process), and a control process for moving the position of the center of gravity of the seated person to a normal position (hereinafter referred to as the following). 2nd center of gravity correction processing).

The body pressure distribution optimization process will be described. The process is executed according to the procedure shown in FIG. FIG. 21 is a diagram illustrating a procedure of the body pressure distribution optimization process.
The body pressure distribution optimization process starts from measuring the body pressure distribution on the back side of the seated person when the seated person sits on the application sheet XS (S031). After the measurement, the controller 50 controls the compressor 52 and the electromagnetic valve 54 so that the air cell (lumbar air cell 8) of the lumbar support Xa3 is expanded by a predetermined amount (S032). These steps S031 and S032 (that is, the measurement of the back body pressure distribution and the operation of the lumbar support Xa3) are easy to understand until the bulging amount of the lumbar air cell 8 is increased until the operation limit of the lumbar support Xa3 is reached. The process is repeated until the maximum is reached (S033).

  Thereafter, the optimal body pressure distribution is determined from the measurement result of the body pressure distribution measured while changing the operation amount of the lumbar support Xa3 (S034). The procedure for determining the optimal body pressure distribution is not particularly limited, but as an example, the measured back body pressure distribution is divided into the upper back, the middle back, and the lower back. The average value of the body pressure is calculated for each part. And the difference of the maximum value and the minimum value is calculated | required among three calculated average values. Here, the body pressure distribution when the difference becomes the smallest is set as the optimum body pressure distribution.

  When the optimal body pressure distribution is determined, the controller 50 sets the operation amount of the lumbar support Xa3 when the same measurement result as that optimal body pressure distribution is obtained as a target amount (S035). Thereafter, the controller 50 controls the compressor 52 and the electromagnetic valve 54 so that the operation amount of the lumbar support Xa3 reaches the target amount (S036). Finally, when the operation amount of the lumbar support Xa3 reaches the target amount (S037), the body pressure distribution optimization process is completed.

  It should be noted that the body pressure distribution optimization process can be realized not only by the procedure shown in FIG. 21, but also by the procedure shown in FIG. FIG. 22 is a diagram illustrating a modification example regarding the procedure of the body pressure distribution optimization process.

  More specifically, in the modified example, the body pressure distribution optimization process starts from measuring the body pressure distribution in the pelvis of the seated person's back when the seated person sits on the application sheet XS ( S041). After the measurement, the controller 50 controls the compressor 52 and the electromagnetic valve 54 so that the waist air cell 8 expands by a predetermined amount (S042). These steps S041 and S042 (that is, the measurement of the body pressure distribution in the pelvis part and the operation of the lumbar support Xa3) are repeated until the body pressure distribution in the pelvis part becomes the target body pressure distribution (S043). Here, the target body pressure distribution is an ideal distribution as a body pressure distribution in the pelvis, and is specifically clarified by statistical data or experiments.

  After the body pressure distribution in the pelvis becomes the target body pressure distribution, the weight of the seated person is measured (S044), and the controller 50 calculates the target pressure from the measurement result of the body weight (S045). Here, the target pressure is an ideal body pressure at a predetermined site of the seated person's spine (specifically, a site called “T9” in anatomy). The procedure for calculating the target pressure from the body weight is not particularly limited, but to explain with an example, the correlation between the ideal pressure and the body weight at a predetermined part of the seated person's spine is experimentally clarified. The target pressure is calculated from the correlation equation.

  After calculating the target pressure, the body pressure of a predetermined part (specifically, a part corresponding to “T9”) of the seated person's spine is measured (S046). After the measurement, the controller 50 controls the compressor 52 and the electromagnetic valve 54 so that the waist air cell 8 expands by a predetermined amount (S047). These steps S046 and S047 (that is, the measurement of the body pressure distribution at the portion corresponding to “T9” and the operation of the lumbar support Xa3) are repeated until the measurement result of the body pressure reaches the target pressure. Finally, when the measurement result of the body pressure distribution at the site corresponding to “T9” reaches the target pressure (S048), the body pressure distribution optimization process according to the modification is completed.

Next, the second center of gravity correction process will be described. The second center-of-gravity correction process is executed according to the procedure shown in FIG. FIG. 23 is a diagram illustrating a procedure of the second gravity center correction process.
Specifically, the second center-of-gravity correction process starts from measuring the body pressure distribution on the back side of the seated person when the seated person sits on the application sheet XS (S051). After the measurement, the controller 50 calculates the degree of distortion of the spine (the degree of bending in the left-right direction) from the measurement result (S052).

  The procedure for calculating the degree of distortion of the spine from the dorsal body pressure distribution is not particularly limited, but as an example, the position where the body pressure is the lowest in the body pressure distribution is the position where the spine is located It corresponds to. Therefore, when the seating posture is normal, as shown in FIG. 24, the position with the lowest body pressure in the body pressure distribution is located at the center in the width direction of the seat. Exists in position. FIG. 24 is a diagram illustrating the relationship between the back body pressure distribution and the position of the center of gravity.

  On the other hand, when the spine is distorted, as shown in FIG. 24, the position where the body pressure is the lowest in the body pressure distribution is shifted from the center in the width direction of the seat. Calculate the condition. In the state where the spine is distorted, naturally, the center of gravity exists at a position shifted from the normal position.

  After calculating the degree of distortion of the spine, the controller 50 controls the compressor 52 and the electromagnetic valve 54 so that the air cell (side air cell 4) of the side support Xa2 is expanded by a predetermined amount (S053). Then, the step S051 of measuring the body pressure distribution on the back side, the step S052 of calculating the degree of distortion of the spine, and the step S053 of operating the side support Xa2 are performed until the center of gravity reaches the normal position. Repeat until the distortion is gone. Finally, when the center of gravity reaches the normal position (S054), the second center of gravity correction process is completed.

(3) Shoulder control processing S003
The shoulder control process S003 is a process for appropriately supporting the seated person's shoulder in accordance with the corrected sitting posture, and is executed according to the procedure shown in FIG. FIG. 25 is a diagram illustrating a procedure of shoulder control processing S003.
Specifically, the shoulder control process S003 starts from measuring the body pressure distribution near the shoulder of the seated person when the seated person sits on the application sheet XS (S061). After the measurement, the controller 50 calculates an index value related to the body pressure distribution near the shoulder from the measurement result (S062). The index value related to the body pressure distribution in the vicinity of the shoulder is not particularly limited, but an example will be described to calculate an average value in the measured body pressure distribution.

  Thereafter, the controller 50 controls the compressor 52 and the electromagnetic valve 54 so that the air cell 10 expands by a predetermined amount in order to operate the shoulder support Xa1 (S063). At this time, the shoulder support Xa1 pushes the seated person's shoulder so that a force is applied to the seated person's shoulder in the widthwise direction and downward.

  The steps described above, that is, the step S061 of measuring the body pressure distribution near the shoulder, the step S062 of calculating the average value of the body pressure distribution, and the step S063 of operating the shoulder support Xa1 are the above average values. Is repeated until the target value is reached. Here, the target value is an average value in the body pressure distribution in the vicinity of the shoulder in a state where the shoulder is satisfactorily held, and is clarified by statistical data or experiments.

  When the average value reaches the target value (S064), the shoulder control process S003 is completed. When the shoulder control process S003 is completed, the contact pressure applied to the shoulder of the seated person by the shoulder support Xa1 is appropriately adjusted, and the shoulder of the seated person is wrapped and supported by the shoulder support Xa1.

(4) Headrest position control process S004
The headrest position control process S004 is a process for appropriately supporting the seated person's head in accordance with the corrected sitting posture. In this control process, the controller 50 controls the pillar position adjustment mechanism 51 based on the body pressure distribution of each part changed by the posture correction. As a result, the positions of the headrest pillar hp and the headrest XS3 supported by the headrest pillar hp are adjusted to appropriate positions according to the corrected sitting posture.
Note that the procedure of the headrest position control process S004, that is, the procedure for adjusting the position of the headrest pillar hp is not particularly mentioned, but the procedure is free as long as the headrest position is adjusted to a position that can favorably support the seated person's head. Can be determined.

The seating posture correction control proceeds according to the flow described above, and when the series of control processes are all completed, the seated posture is corrected to a suitable posture. Incidentally, in the above example, the correction control proceeds in the order of the cushion side control process S001, the waist control process S002, the shoulder control process S003, and the headrest position control process S004. However, the present invention is not limited to this. . That is, the order of each control process in the correction control can be considered other than the above example. Specifically, the correction control may proceed in the order shown in the following R1) to R9). In each of the following R1) to R9), each control process is represented only by a symbol. For example, the cushion side control process S001 is represented as S001.
R1) S001, S003, S002, S004
R2) S001, S003, S004, S002
R3) S002, S003, S001, S004
R4) S002, S001, S003, S004
R5) S002, S003, S004, S001
R6) S003, S002, S001, S004
R7) S003, S001, S002, S004
R8) S003, S002, S004, S001
R9) S004, S003, S002, S001

<< Development structure of application sheet XS >>
In the above-described embodiment, the vehicle seat capable of correcting the posture of the seated person based on the measurement results of various sensors, that is, the application seat XS has been described. As a configuration obtained by further developing the application sheet XS, a configuration in which the sheet position and the state of the sheet itself can be adjusted based on the measurement results of various sensors can be considered. Below, the development structure of this application sheet XS is demonstrated.

  The application sheet XS having the configuration developed as described above (hereinafter, application sheet XS according to the development example) can be actively adjusted in position and state. Specifically, as shown in FIG. 26, the application sheet XS according to the development example includes the above-described sensor group, the controller 50, and the pillar position adjustment mechanism 51, and further includes a front-rear position adjustment mechanism 61, a height. An adjustment mechanism 62 and a cushion length adjustment mechanism 63 are provided. FIG. 26 is a diagram showing a developed configuration of the application sheet XS, and strictly speaking, shows a configuration of a system for adjusting the sheet position and the state of the sheet.

  The front / rear position adjusting mechanism 61 is a mechanism for moving the application seat XS back and forth, and includes a known slide rail device provided at the lower portion of the seat and a drive mechanism for driving a movable portion of the slide rail device. The height adjustment mechanism 62 is a mechanism for adjusting the position of the application sheet XS in the vertical direction, and includes a known rotation link device provided at the lower portion of the sheet and a drive mechanism for driving the rotation link. The cushion length adjustment mechanism 63 is a mechanism for extending the entire length (length in the front-rear direction) of the seat cushion XS2 of the application seat XS. The cushion length adjusting mechanism 63 drives an expansion device (for example, a device corresponding to the above-described ottoman portion Xa5) provided in a state where the seat cushion XS2 can move forward and backward, and a movable portion of the expansion device. Drive mechanism.

  And in the application sheet XS which concerns on an extended example, the controller 50 estimates a seated person's physique from the measurement result at the time of measuring a seated person's physical information with various sensors. Thereafter, the controller 50 controls each of the above mechanisms (specifically, the pillar position adjusting mechanism 51, the front / rear position adjusting mechanism 61, the height adjusting mechanism 62, and the cushion length adjusting mechanism 63) based on the prediction result. As a result, the position, cushion length, and headrest position (hereinafter referred to as seat position, etc.) of the application seat XS according to the development example are adjusted to optimum contents according to the predicted physique of the seated person.

The adjustment of the sheet position and the like described above is executed, for example, according to the procedure shown in FIG. FIG. 27 is a diagram illustrating a procedure relating to adjustment processing of the sheet position and the like.
The adjustment processing of the seat position and the like starts from measuring the physical information of the seated person with various sensors mounted on the application seat XS (S101). In this measurement step S101, the weight of the seated person is measured by a weight sensor mounted on the application sheet XS, and the body width of the seated person (the width of the torso) is measured. Here, the measurement of the body width is not particularly limited. For example, the body pressure distribution of the seated person (especially the pressure distribution near the lumbar vertebra or the pelvis) is measured, and then the seated person and the seat are measured. It is considered that the body width is determined from the contact length. Alternatively, a seated person may be imaged by a camera installed in front of the seat, and the body width may be determined by analyzing the image.

Note that the measurement step S101 is automatically executed when a predetermined condition is satisfied. As execution conditions of measurement process S101, it is possible to employ | adopt one of following 1) -4), for example.
1) When a weight sensor detects a load that is applied when a seated person sits on the application seat XS 2) When a seat belt is detected by a sensor for determining whether the seat belt is mounted 3) A camera installed in the vehicle 4) When the seated person seated on the application seat XS is detected 4) When the seating surface temperature of the seat cushion XS2 is monitored by the temperature sensor, and when it is detected that the temperature rising rate of the seating surface temperature is equal to or higher than the threshold value 1 In addition to the cases listed in (4) to (4), the measurement step S101 may be executed when a seated person operates a switch (not shown) provided in the vehicle.

  After execution of the measurement step S101, the controller 50 predicts the seated person's physique from the measurement result (S102). More specifically, the controller 50 predicts the seated person's height from the measured body width and weight, and further predicts the seated person's physique from the predicted height. Here, the seated person's physique corresponds to the leg length, arm length, head position, eye height, etc. of the seated person. Further, the method for predicting the height from the body width and the weight and the method for predicting the physique of the seated person from the height are not particularly limited. It is good also as calculating | requiring from statistical data and substituting each value for the said correlation type | formula.

  Thereafter, the controller 50 specifies an optimal seat position or the like according to the predicted physique of the seated person (S103). Specifically, the controller 50 predicts the leg length, arm length, head position, and eye height of the seated person in the previous step S102, and the adjustment items corresponding to these parameters. , Determine the adjustment amount. The correspondence between various parameters and adjustment items is as shown in FIG. 28. For example, the seat position and the cushion length in the front-rear direction are adjusted according to the length of the legs. FIG. 28 is a diagram illustrating a correspondence relationship between each parameter related to the physique of the seated person and adjustment items related to the seat.

  Further, after specifying the optimum seat position and the like, the controller 50 controls the pillar position adjusting mechanism 51, the front / rear position adjusting mechanism 61, the height adjusting mechanism 62, and the cushion length adjusting mechanism 63 according to the specifying result (S104). . As a result, the sheet position and the like of the application sheet XS are adjusted to the optimum content specified in the previous process S103. When such adjustment is completed, the adjustment processing of the sheet position and the like is completed.

  By the way, as described above, the adjustment amount related to the seat position and the like is determined in accordance with the parameter related to the seated person's physique, and the parameter is predicted based on the body width and weight of the seated person measured in the measurement step S101. Is supposed to be done. Therefore, the amount of adjustment for the seat position, etc. depends on the prediction result related to the physique of the seated person, and if there is a difference between the prediction result and the true physique, an error will occur in the calculation result of the adjustment amount. However, the seat position may not be optimized.

Here, the following E1) to E6) are listed as factors causing the above error.
E1) The weight of the seated person sitting on the application sheet XS is not accurately measured because the foot is on the vehicle floor. E2) The weight cannot be accurately measured by the clothes worn by the seated person. E3) Seating E4) The relationship between the body width, weight, and height of the seated person deviates from the relationship shown in the formula (correlation formula) for predicting height from the body width and weight. E5) The relationship between the height of the seated person and the physique deviates from the relationship shown in the formula (correlation formula) that predicts the physique from the height. E6) The seated state of the seated person is the normal sitting state. Is different from

  Therefore, in the application sheet XS according to the development example, measures are taken to eliminate the influence of the above-described error factors, and appropriate adjustment of the sheet position and the like is realized. Hereinafter, the error factor elimination measures employed in the application sheet XS according to the development example will be described.

  First, in contrast to the fact that the weight is not accurately measured because the seated person's foot is on the vehicle body floor, which is cited as the first error factor E1, the application sheet XS according to the development example is used for weight measurement. The height adjustment mechanism 62 raises the height of the sheet to the highest position in the adjustment range. As a result, when the weight is measured, the seated person's feet are lifted from the vehicle body floor and the applied seat XS is placed on the entire weight, so that the weight can be accurately measured.

  In addition, the method of eliminating the error requirement E1 may be considered other than the above contents. For example, if the cushion length adjustment mechanism 63 makes the cushion length the longest and puts the entire leg on the seat cushion XS2, Similar to the above-described contents, the application sheet XS is overwhelmed. Further, it is possible to prompt the seated person to raise his / her foot by a sound, a warning display, or the like during weight measurement. Also, after clarifying the amount of deviation between the actual weight measurement result and the true weight through experiments, a correction formula for correcting the measurement result is determined, and the measurement result is corrected by the correction formula. It is good to do. Alternatively, the weight measurement is continued from the time when the vehicle door is opened, and the measurement result at the moment (in other words, the application seat XS It is good also as making a net weight the weight when the whole body weight starts.

Next, with respect to “the weight is not accurately measured by clothes” mentioned as the second error factor E2, in the applied seat XS according to the development example, the capacitance sensor 42 mounted in the seat cushion XS2 is used. The weight measurement result is corrected based on the measurement result. More specifically, since the measurement result of the capacitance sensor 42 varies depending on the amount of clothes of the seated person, a correction amount corresponding to the measurement result of the capacitance sensor 42 is calculated, and the correction amount is calculated. Net weight is added to the weight measurement result.
As for the calculation method of the correction amount, the correlation between the measurement result of the capacitance sensor 42 and the correction amount is clarified by experiments and the correction amount is calculated by substituting the measurement result of the capacitance sensor 42 into the correlation equation. Should be calculated.

Next, with respect to “the body width is not accurately measured by clothes” mentioned as the third error factor E3, in the applied seat XS according to the development example, the capacitance sensor mounted in the seat cushion XS2 The weight measurement result is corrected based on the 42 measurement results. That is, similar to the weight correction described above, a correction amount corresponding to the measurement result of the capacitance sensor 42 is calculated, and the measurement result of the body width is corrected by the correction amount to obtain the net body width.
As for the calculation method of the correction amount, the correlation between the measurement result of the capacitance sensor 42 and the correction amount is clarified by experiments and the correction amount is calculated by substituting the measurement result of the capacitance sensor 42 into the correlation equation. Should be calculated.

Next, in response to “the relationship between the body width, the weight, and the height of the seated person being out of the correlation formula used for the height prediction” mentioned as the fourth error factor E4, the application sheet XS according to the development example The seat occupant can adjust the seat position and the like again by operating a switch (not shown) after adjusting the seat position and the like. At this time, the controller 50 learns the operation amount of the seated person, that is, the readjustment amount. Then, in the adjustment after the next time, the adjustment reflecting the operation amount (readjustment amount) is executed.
As described above, the manual operation of the seated person is learned and reflected in the subsequent adjustments, which is mentioned as the fifth error factor E5, “The correlation between the height of the seated person and the physique is used for physique prediction. It has also been adopted as a measure against “out of the formula”.

  Next, with respect to “the seated state of the seated person is different from the normal seated state” mentioned as the sixth error factor E4, in the application sheet XS according to the development example, The seat position etc. will be adjusted in consideration. Here, the “sitting state” means the sitting position or sitting posture of the seated person. In addition, the “state different from the normal sitting state” means, for example, a state where the seated person is seated at a position slightly ahead of the normal seating position. It is a state in which the seated person's back is tilted more backward than usual, and is located in front of the position.

  Then, when the seating state is different from the normal seating state, the controller 50 detects that fact and calculates the difference from the normal seating state. More specifically, the application sheet XS according to the development example includes weight sensors at four positions, front, rear, left, and right, and the controller 50 determines the current position of the center of gravity of the seated person based on the measurement results of the weight sensors. calculate. Note that a known calculation method can be used for the calculation method of the center of gravity position.

  Here, when the seating state is different from the normal seating state, the center of gravity position of the seated person is also deviated from the normal position, and the controller 50 determines the position between the calculated center of gravity position and the normal center of gravity position. The amount of deviation is calculated. The amount of deviation of the center of gravity position corresponds to the amount of difference in the seated state. Note that the normal center-of-gravity position is obtained from data when the seated person is seated on the application seat XS in the normal seating state, and is stored in the controller 50 in advance.

  The controller 50 determines each adjustment amount in consideration of the above-described shift amount of the center of gravity when determining each adjustment amount related to the sheet position or the like. Thus, by adjusting the seat position and the like in consideration of the shift amount of the center of gravity position, even if the seated person is seated on the application seat XS in a seating state different from the normal state, the seating state is changed to the seating state. Accordingly, it is possible to adjust to the optimum content for the seat position and the like.

  As described above, in the application sheet XS according to the development example, it is possible to suppress occurrence of an error when calculating the adjustment amount related to the sheet position and the like by eliminating the assumed error factor. is there.

DESCRIPTION OF SYMBOLS 1 Upper frame 2 Side frame 2a Side plate, 2b Front edge part 3 Lower connection frame 4 Side air cell 5 Pressure receiving plate 5a Bonding wire 6 Pillar position adjustment mechanism 7 Pillar support part 8 Waist air cell 9 Cushion air cell 10 Air cell 11 Support plate 12 Holding pipe 13 Mounting bracket 13a Base part, 13b Side part 14 Rod-like member 15 Wire 16 Pressure receiving plate 20 Resin plate 20a Notch 21 Deformation part 22 Extension part 23 Groove 24 Notch 25 One end side deformation part piece 26 Other end side deformation part piece 30 Ottoman air cell 31 Support member 31a Support fragment 40 Shape sensor 41 Body pressure sensor 41a Detection unit, 41b Transmission path 42 Capacitance sensor 50 Controller 51 Pillar position adjustment mechanism 52 Compressor 53 Air supply path 54 Electromagnetic valve 55 Tilt mechanism 61 Front and rear Position adjustment mechanism 2 Height adjustment mechanism 63 Cushion length adjustment mechanism S Main seat S1 Seat back S2 Seat cushion S3 Headrest Sa1 Shoulder support portion Sa2 Side support Sf1 Seat back frame C1, C2 Tube member CS Control system hp Headrest pillar XS Application seat Xf2 Cushion frame XS1 Seat back XS2 Seat cushion XS3 Headrest Xa1 Shoulder support Xa2 Side support Xa3 Lumbar support Xa4 Cushion side support Xa5 Ottoman part XP1, XP2 Pad material Pa1 Flat part, Pb1 protuberance part, Pc1 Suspension groove

Claims (10)

A vehicle seat including a seat back for supporting a seated person from the back side,
Of the seat back, a shoulder support portion that supports the shoulder of the seated person includes a bag body that bulges when a fluid is sealed,
When the bag body swells, one end portion of the shoulder support portion on the outer side in the width direction of the vehicle seat moves more forward than the other end portion on the inner side in the width direction. Vehicle seat.   When the one end moves forward relative to the other end due to the bulging of the bag body, the upper part in the one end moves forward relative to the lower part in the one end. The vehicle seat according to claim 1.   The vehicle according to claim 1, wherein the bag body is provided such that an end on the outer side in the width direction of the bag body is positioned below an end on the inner side in the width direction. Sheet. The seat back includes a plate-like member disposed at a front position of the bag body,
The bag body bulges while contacting the rear surface of the plate-like member, so that the portion corresponding to the one end portion of the plate-like member is positioned forward of the portion corresponding to the other end portion. When the plate-like member is deformed, the one end moves forward from the other end,
4. The vehicle seat according to claim 1, wherein an area of the front surface of the plate-like member is larger than an area of a contact surface of the bag body with the plate-like member. 5. The seat back includes a plate-like member disposed at a front position of the bag body,
The bag body bulges while contacting the rear surface of the plate-like member, so that the portion corresponding to the one end portion of the plate-like member is positioned forward of the portion corresponding to the other end portion. When the plate-like member is deformed, the one end moves forward from the other end,
In the plate-like member, in order to separate both of the first portion located behind one shoulder of the seated person and the second portion located behind the other shoulder of the seated person. The vehicle seat according to any one of claims 1 to 4, wherein a separating portion is formed. The seat back is
A plate-like member disposed at a front position of the bag,
A movement restricting portion disposed at both ends in the width direction of the seat back, for restricting the movement of the seated person in the width direction,
The plate-like member is
The bag body bulges while contacting the rear surface of the plate-like member, so that the portion corresponding to the one end portion of the plate-like member is deformed so as to be positioned in front of the portion corresponding to the other end portion. A deformation part;
An extension part located below the deformation part and extending downward so as to pass between the movement restriction parts in the width direction;
The extension portion is arranged so that the width portion is narrower than the deformation portion and both ends in the width direction are located inside the movement restricting portion. The vehicle seat according to claim 5. The bag body is provided with two in a state aligned in the width direction,
The seat back in which the gap formed between the two bag bodies in the width direction is located in the tube member that forms the path of the fluid supplied to the bag body and the fluid discharged from the bag body The vehicle seat according to any one of claims 1 to 6, wherein the vehicle seat is routed so as to pass through a central portion of the vehicle seat. The seat back includes a plate-like member disposed at a front position of the bag body,
The plate-like member bulges while the bag body is in contact with the rear surface of the plate-like member, so that the portion corresponding to the one end in the plate-like member is more forward than the portion corresponding to the other end. It has a deformed part that deforms so as to be positioned at the upper end part,
The part located in the edge part of the said width direction outer side among the outer edges of the said deformation | transformation part is inclined so that it may descend | fall toward the said width direction outer side. The vehicle seat according to Item. The seat back includes a plate-like member disposed at a front position of the bag body,
The plate-like member is
The bag body bulges while contacting the rear surface of the plate-like member, so that the portion corresponding to the one end portion of the plate-like member is deformed so as to be positioned in front of the portion corresponding to the other end portion. A deformation part;
An extension part located below the deformation part and extending downward,
The vehicle seat according to any one of claims 1 to 8, wherein the deformable portion and the extending portion are connected and integrated. The seat back is
A seat back frame forming a skeleton of the seat back;
A support plate attached to the seat back frame and supporting the bag from behind;
10. The vehicle seat according to claim 1, further comprising: a holding portion that is attached to the seat back frame and holds the support plate in contact with a rear surface of the support plate. .

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