JP2018001918A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat capable of adjusting tension generated on a pad support member with a simple structure.SOLUTION: A vehicle seat 1 is configured so that, between a pair of side frames 11 facing each other and extending, a pad support member 20 for supporting a pad member 411 from a rear side, is stretched. The pad support member 20 is formed by connecting cloth bodies 21A, 21B and a bag body 231, in a lateral direction. When the bag body 231 is expanded in a vertical direction by supply of air, the bag body enhances tension generated on the pad support member 20, and when the bag body is shrunk in the vertical direction by discharge of air, the bag body reduces the tension generated on the pad support member 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat.

  2. Description of the Related Art A vehicle seat is known in which a pad member is supported from the back side by a fabric-like pad support member stretched on a seat frame. In the automobile seat disclosed in Patent Document 1, the pad support member supports the pad member of the seat back from the rear side. The pad support member has both left and right ends connected to a pair of columnar members. And the repulsive force of a pad support member can be adjusted according to a seated person's liking by separating and approaching a pair of said columnar member mutually by the link mechanism comprised combining several link plates. That is, by separating the columnar members from each other, the tension generated in the pad support member is increased to increase the repulsive force on the seated person, and by bringing the columnar members closer to each other, the tension generated in the pad support member is decreased to reduce the tension on the seated person. The repulsive force can be weakened.

Japanese Patent No. 5347696

  In the automobile seat disclosed in Patent Document 1, the tension generated in the pad support member is adjusted by a link mechanism having a complicated structure configured by combining a plurality of link plates. For this reason, development of the vehicle seat which can adjust the tension | tensile_strength which generate | occur | produces in a pad support member with a simpler structure was desired.

  In view of such a problem, an object of the present invention is to provide a vehicle seat capable of adjusting a tension generated in a pad support member with a simple structure.

  1st invention of this invention is a vehicle seat, Comprising: The pad support member which supports a pad member from the back side is stretched between a pair of seat frame structural members extended opposingly, This pad support member Is formed by connecting a fabric-like planar body and a bag body in an in-plane direction, and when the bag body swells in the thickness direction of the planar body by supplying a fluid, the pad It is configured to increase the tension generated in the support member and reduce the tension generated in the pad support member when the support member is deflated in the thickness direction of the planar body by discharging the fluid.

  According to the first aspect of the invention, the pad support member is formed by connecting the fabric-like planar body and the bag body in the in-plane direction. When the bag body swells in the thickness direction of the planar body due to the supply of fluid, the tension generated in the pad support member is increased, and when the bag body is deflated in the thickness direction of the planar body due to fluid discharge, It is configured to reduce the generated tension. That is, the tension generated in the pad support member can be adjusted with a simple structure in which fluid is supplied to or discharged from the bag body.

  According to a second aspect of the present invention, in the first aspect, the pair of seat frame constituent members constitute a cushion frame, and the pad support member supports the pad member from below, The planar body is disposed in a portion corresponding to the sciatic tubercle portion of a seated person seated on the vehicle seat, and the bag is provided on the left and right and / or both front and rear sides of the portion corresponding to the sciatic tubercle portion. The body is disposed.

  When the seating pressure on the seating surface of the pad member becomes uneven with a peak at a position corresponding to the sciatic nodule of the seated person seated on the vehicle seat, there is a problem that the seating comfort is not good. According to the second aspect of the present invention, the planar body is disposed in the portion corresponding to the sciatic nodule portion of the seated person, and the bag is provided on the left and right and / or both front and rear sides of the portion corresponding to the seated person sciatic nodule portion. The body is arranged. That is, in a state where the bag body is inflated in the thickness direction of the planar body, a portion of the pad member corresponding to the sciatic nodule portion of the seated person and a portion of the pad support member corresponding to the seated person's sciatic nodule portion A space will be formed between them. Therefore, when the seated person sits on the vehicle seat, the pad member corresponding to the seated person's sciatic tuberosity portion can be bent downward without being inhibited by the pad support member. Therefore, it is possible to improve the sitting comfort by reducing the sitting pressure at the position corresponding to the sciatic tubercle of the seated person.

  According to a third aspect of the present invention, in the second aspect described above, the bag body and the portion corresponding to the sciatic nodule portion are formed by two planar members that are partially joined while being stacked in the thickness direction. The planar body is formed.

  According to the third aspect of the present invention, by the two planar members partially joined in a state of being overlapped in the thickness direction, the bag, and the planar body of the portion corresponding to the sciatic tubercle of the seated person, Both are formed. Therefore, for example, the bag body is formed by the two sheet-like members, and the sheet-like body corresponding to the seated person's sciatic tubercle is formed by a member separate from the two sheet-like members. The pad support member can have a simple structure because of the structure to be formed.

  According to a fourth aspect of the present invention, in the first aspect, the pair of seat frame constituent members constitute a back frame, and the pad support member supports the pad member from the rear side, The planar body is disposed in a portion corresponding to the scapula portion of a seated person seated on the vehicle seat, and the bag is provided on the left and right and / or the upper and lower side portions of the portion corresponding to the scapula portion. The body is disposed.

  When the seating pressure on the back surface of the pad member becomes uneven with a peak at a position corresponding to the scapula portion of the seated person seated on the vehicle seat, there is a problem that the seating comfort is not good. According to the third aspect of the present invention, the planar body is disposed in the portion corresponding to the scapula portion of the seated person, and the bag is provided on the left and right and / or the upper and lower side portions of the portion corresponding to the scapula portion of the seated person. The body is arranged. That is, in a state where the bag body is inflated in the thickness direction of the planar body, a portion of the pad member corresponding to the scapula portion of the seated person and a portion of the pad support member corresponding to the scapula portion of the seated person A space will be formed between them. For this reason, when the seated person sits on the vehicle seat, the pad member corresponding to the shoulder blade of the seated person can bend rearward without being obstructed by the pad support member. Therefore, it is possible to improve the sitting comfort by reducing the sitting pressure at the position corresponding to the shoulder blade of the seated person.

  According to a fifth aspect of the present invention, in the fourth aspect, the bag body and the portion corresponding to the scapula portion are formed by two planar members that are partially joined in a state of being stacked in the thickness direction. The planar body is formed.

  According to the fifth aspect of the present invention, by the two planar members partially joined in the state of being overlapped in the thickness direction, the bag and the planar body corresponding to the shoulder blade of the seated person, Both are formed. Therefore, for example, the bag body is formed by the two sheet-like members, and the sheet-like body corresponding to the scapula portion of the seated person is formed by a member separate from the two sheet-like members. The pad support member can have a simple structure because of the structure to be formed.

1 is a perspective view of an automobile seat according to a first embodiment of the present invention. It is a disassembled perspective view of the cushion frame and pad support member of the vehicle seat according to the embodiment. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. It is a figure which shows the condition where the bag body is inflating in the vehicle seat which concerns on the said embodiment corresponding to FIG. It is a disassembled perspective view of the cushion frame and pad support member of the vehicle seat which concern on 2nd Embodiment of this invention. It is sectional drawing which shows the condition which cut | disconnected the vehicle seat which concerns on the said embodiment by the surface perpendicular | vertical with respect to the left-right direction.

  1 to 4 show a first embodiment of the present invention. This embodiment shows an example in which the present invention is applied to an automobile seat. In each figure, each direction of the vehicle when an automobile seat is attached to the vehicle is indicated by an arrow. In the following description, the description regarding the direction is made based on this direction. In addition, as needed, the seated person seated on the vehicle seat is shown as D, and the seated person's sciatic tubercle is shown as KT.

  As shown in FIG. 1, an automobile seat 1 is composed of a seat back 2 that is a backrest portion and a seat cushion 3 that is a seating portion.

  As shown in FIG. 1, the seat back 2 has a structure in which a back pad 2B that is a cushioning material is placed on a back frame 2A that is a skeleton member, and is covered with a back cover 2C that is a skin material. doing. The back frame 2A has a structure in which a pair of left and right side frames 2A1, an upper frame 2A2 that connects the upper ends of the side frames 2A1, and a lower pipe 2A3 that connects the lower ends of the side frames 2A1 are combined.

  As shown in FIG. 1, the seat cushion 3 is connected to the lower end portion of the seat back 2. The seat cushion 3 has a structure in which a pad support member 20 is stretched on a cushion frame 10 that is a skeleton member, and a cushion pad 30 is placed on the cushion frame 10 and covered with a cushion cover 40.

  As shown in FIGS. 1 and 2, the cushion frame 10 is a metal frame member, and includes a pair of left and right side frames 11, a front panel 12 that connects the front end portions of the side frames 11, and a little more than the front panel 12. The front pipe 13 that connects the side frames 11 and the rear pipe 14 that connects the rear ends of the side frames 11 are combined on the rear side. A mounting bracket 15 formed with a substantially L-shaped claw that extends slightly inward in the width direction of the vehicle seat 1 and then bends and extends upward is slightly fixed to the rear side of the center portion in the front-rear direction of the side frame 11 by welding. ing. The mounting bracket 15 is configured to be able to lock the round bar member 25 of the pad support member 20. The side frame 11 corresponds to a “seat frame constituent member” in the claims.

  As shown in FIG. 2, the pad support member 20 is a belt-like member extending in the left-right direction. The pad support member 20 is configured by alternately connecting a planar fabric body and a bag body member 23 in the left-right direction. More specifically, the pad support member 20 includes, from the left, the first terminal side fabric body 21B, the first bag body member 23, the center side fabric body 21A, the second bag body member 23, and two pieces. It is the structure connected in order of the terminal side fabric body 21B.

  As shown in FIGS. 2 and 3, the center side fabric body 21A and the terminal side fabric body 21B are woven fabrics produced by weaving polyester yarns, and each is formed into a substantially rectangular shape that is long in the front-rear direction. ing. A loop 21Ba is formed in the terminal side fabric body 21B by folding and sewing the terminal portion on the outer side in the width direction of the automobile seat 1 downward. A metal round bar member 25 extending in the front-rear direction is passed through the loop 21Ba. A male fastener 26 extending in the front-rear direction is sewn on the upper surface of the terminal-side fabric body 21B. The bag member 23 is a member formed by superposing two sheet-like planar polyurethane thermoplastic sheet members that are long in the front-rear direction and heat-welding them in a bag shape. An inflating bag 231 is formed. More specifically, the bag member 23 has a configuration in which the planar member is welded so that the bag body 231 is formed in a substantially U shape that opens to the rear side when viewed from above. That is, the bag body member 23 includes an edge welded portion 232A formed by welding the edge of the planar member, and a central portion in the front-rear direction of the bag member 23 from the left and right central portion of the rear end portion of the planar member. A belt-like welded portion 232B formed by welding the extending belt-like region.

  The central fabric body 21A and the bag body member 23 are in a state where the left end of the central fabric body 21A and the right edge welded portion 232A of the left bag body member 23 are overlapped in this order from below. The right side end of the center side fabric body 21A and the left side edge welded portion 232A of the right side bag body member 23 are sewn and sewn in a state of being overlapped in this order from below. Has been. The terminal-side fabric body 21B and the bag body member 23 are overlapped in this order from the bottom with the right-side end of the left-side terminal-side fabric body 21B and the left-side edge welded portion 232A of the left-side bag body member 23. And the left end of the right end side fabric body 21B and the right edge welded portion 232A of the right bag member 23 are overlapped in this order from below. It is connected by being worn. In the state where the center side fabric body 21A, the terminal side fabric body 21B and the bag body member 23 are connected as described above, in a cross section in which the rear side portion of the pad support member 20 is cut by a plane perpendicular to the front-rear direction, As shown in FIG. 3, from the left, the terminal side fabric body 21B, the bag body 231, the belt-like welded portion 232B, the bag body 231, the center side fabric body 21A, the bag body 231, the belt-like welded portion 232B, the bag body 231, the terminal side. The fabric bodies 21B are arranged in this order. That is, the center side fabric body 21A, the terminal side fabric body 21B, and the belt-like welded portion 232B of the bag body member 23 correspond to the “planar body” in the claims. The dimensions of each part of the pad support member 20 are such that when the round bar member 25 of the pad support member 20 is locked to the mounting bracket 15 of the cushion frame 10, the center side fabric body 21A, the terminal side fabric body 21B, and the bag. The body member 23 is stretched in the left-right direction, and the belt-like welded portion 232B of the bag member 23 passes through the sciatic nodule portion KT of the seated person D seated on the automobile seat 1. .

  As shown in FIG. 2, the bag body 231 is connected to the pump 51 via the air tube 52. An electric valve 53 is connected to the air tube 52. The electric valve 53 communicates the bag body 231 and an air release port (not shown) when energized, and communicates the bag body 231 and the pump 51 when not energized. The pump 51 generates compressed air when energized and supplies the compressed air to the bag body 231. A check valve 54 is disposed between the pump 51 and the electric valve 53. The check valve 54 allows air flow from the pump 51 to the electric valve 53 and blocks air flow opposite to the air flow.

  As shown in FIGS. 1 and 3, the cushion pad 30 is a member formed by foaming urethane resin. The cushion pad 30 includes a center front pad 32 placed on the front panel 12 of the cushion frame 10 and a pair of left and right seats placed on the side frame 11 continuously to the left and right sides of the center front pad 32. And side pad 33. That is, the cushion pad 30 has a substantially U-shape that opens to the rear side when viewed from above, and when the cushion pad 30 is placed on the cushion frame 10, the cushion pad 30 is not on the upper side of the pad support member 20. Become. The cushion pad 30 is composed of a mold pad.

  The cushion cover 40 is formed into a three-dimensional shape by sewing pieces such as fabric and genuine leather. More specifically, the cushion cover 40 includes a support member cover 41 that covers the pad support member 20, a center front cover 42 that covers the center front pad 32, and a side cover 43 that covers the side pad 33. ing. As shown in FIG. 3, a cover pad 411 which is a slab pad fixed by a frame laminating method is provided on the lower surface portion of the support member cover 41. Female fasteners 416 extending in the front-rear direction are sewn to the left and right sides of the lower surface of the cover pad 411. A lap pad 414 that is a slab pad is bonded to the left and right center of the lower surface of the cover pad 411. The cushion cover 40 is a hook in which the support member cover 41 is fixed to the pad support member 20 by adhering the female surface fastener 416 and the male surface fastener 26, and the terminal portion of the cushion cover 40 is sewn to the terminal portion. It is assembled by being fixed to the cushion frame 10 by locking the member J and the cushion frame 10. The cover pad 411 corresponds to a “pad member” in the claims.

  Based on FIG.2 and FIG.3, the assembly method of the seat cushion 3 is demonstrated. First, the pad support member 20 is assembled to the cushion frame 10 by engaging the round bar member 25 of the pad support member 20 with the mounting bracket 15 of the side frame 11. Next, the cushion pad 30 is placed on the cushion frame 10. Thereafter, the female fastener 416 of the support member cover 41 of the cushion cover 40 is attached to the male fastener 26 of the pad support member 20. Then, the hook member J of the cushion cover 40 is locked to the cushion frame 10. That's it.

  The operation of the pad support member 20 will be described with reference to FIGS. In the initial state, as shown in FIG. 3, the bag body 231 is slightly swollen in the vertical direction with a smaller amount of air than the limit amount. At this time, the electric valve 53 and the pump 51 are not energized. When the pad support member 20 is in the initial state, the repulsive force of the pad support member 20 is weak because the tension generated in the pad support member 20 is relatively low. That is, when the seated person D is seated on the automobile seat 1, the seat comfort of the seat cushion 3 is relatively soft. From the initial state, first, the pump 51 is energized while the electric valve 53 is not energized. Then, the compressed air from the pump 51 is supplied to the bag body 231 through the air tube 52. As a result, as shown by the solid line in FIG. 4, the bag body 231 swells in the vertical direction from the initial state, so the lateral dimension of the bag body 231 becomes shorter than the initial state. Thereby, the center side fabric body 21A, the terminal side fabric body 21B, and the belt-like welded portion 232B are pulled in the left-right direction, and the tension generated in the pad support member 20 is increased. At this time, the center-side fabric body 21A and the terminal-side fabric body 21B slightly extend in the horizontal direction, but the belt-like welded portion 232B has a configuration that is less likely to extend than the center-side fabric body 21A and the terminal-side fabric body 21B. Therefore, the dimension in the left-right direction is almost unchanged. When the tension generated in the pad support member 20 reaches a desired magnitude, the pump 51 is deenergized while the electric valve 53 is deenergized, so that the tension can be maintained. In this state, since the tension generated in the pad support member 20 is higher than the initial state, the repulsive force of the pad support member 20 is strong. That is, when the seated person D sits on the automobile seat 1, the seat comfort of the seat cushion 3 is relatively hard. Thereafter, when the electric valve 53 is energized, the air in the bag body 231 flows into the air tube 52 and is discharged from the electric valve 53. As a result, since the bag body 231 is deflated in the vertical direction, the lateral dimension of the bag body 231 is increased. Thereby, the bag body center side fabric body 21A, the terminal side fabric body 21B, and the belt-like welded portion 232B are loosened, and the tension generated in the pad support member 20 is lowered. When the bag body 231 is deflated to the initial state, the electric valve 53 is de-energized, and the bag body 231 is held in the initial state as shown by a two-dot chain line in FIG.

  1st Embodiment comprised as mentioned above has the following effects. The pad support member 20 is formed by connecting fabric bodies 21A and 21B and a bag body 231 in the left-right direction. The bag body 231 increases the tension generated in the pad support member 20 when the bag body swells in the vertical direction due to the supply of air, and decreases the tension generated in the pad support member 20 when the bag body 231 is deflated in the vertical direction due to the discharge of air. It is configured as follows. That is, the tension generated in the pad support member 20 can be adjusted with a simple structure in which air is supplied to or discharged from the bag body 231.

  Further, a planar belt-like welded portion 232B formed on the bag member 23 is disposed at a portion corresponding to the sciatic nodule portion KT of the seated person D, and left and right of the portion corresponding to the sciatic nodule portion KT of the seated person D The bag body 231 is arrange | positioned at the both sides. That is, in a state where the bag body 231 is inflated in the vertical direction, the cover pad 411 corresponding to the sciatic nodule KT of the seated person D and the pad support member 20 corresponding to the sciatic nodule KT of the seated person D are included. A space is formed between the two. For this reason, when the seated person D sits on the vehicle seat 1, the cover pad 411 corresponding to the sciatic nodule portion KT of the seated person D bends downward without being inhibited by the pad support member 20. Can do. Therefore, the sitting pressure can be reduced at the position corresponding to the sciatic nodule portion KT of the seated person D, and the sitting comfort can be improved.

  Further, by the bag member 23 composed of two sheet-like members partially joined in the vertically stacked state, the sheet 231 and the planar shape of the portion corresponding to the sciatic nodule KT of the seated person D Both the belt-like welded portion 232B, which is a body, are formed. For this reason, for example, the bag body 231 is formed by the bag body member 23, and the planar body of the portion corresponding to the sciatic nodule portion KT of the seated person D is formed by a member separate from the bag body member 23. As a result, the pad support member 20 can have a simple structure.

  Furthermore, since the pad support member 20 is mainly composed of soft fabric bodies 21A and 21B and a bag body member 23, even if the pad member is a cover pad 411 having a small thickness, It is difficult for the seated person D who is seated to feel foreign objects. For this reason, thickness reduction of the seat cushion 3 can be achieved.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the pad support member 20 of the first embodiment is mainly modified. The same structures as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment, mounting brackets 65 are attached to the front pipe 13 and the rear pipe 14 of the cushion frame 10. The mounting bracket 65 is a member that is mounted by being fastened by a fastening bolt (not shown) with the front pipe 13 or the rear pipe 14 covered from the upper side, and has a claw 65A that protrudes upward. The front pipe 13 and the rear pipe 14 correspond to “seat frame components” in the claims.

  Further, the pad support member 20 is a belt-like member extending in the front-rear direction. The pad support member 20 has a frame-shaped bag body member 73 formed with a substantially rectangular hole elongated in the left-right direction at the center, and a fabric body 71 attached so as to close the hole of the bag body member 73. Are connected to each other. The fabric body 71 is a woven fabric produced by weaving polyester yarn, and is formed in a substantially rectangular shape corresponding to the shape and size of the hole of the planar member. The bag member 73 is a member in which two sheet-like members made of thermoplastic polyurethane resin having the above holes are stacked and heat-sealed in a bag shape, and has a substantially U-shape that opens to the rear side when viewed from above. The front side bag body 731f and the substantially U-shaped rear side bag body 731r that opens to the front side in a top view are formed so as to face each other in the front-rear direction. That is, the bag member 73 includes an edge welded portion 732A formed by welding the edge of the planar member, and a front bag 731f and a rear bag extending in the left-right direction at the center in the front-rear direction of the planar member. A belt-like welded portion 732B partitioning the body 731r and a hole edge welded portion 732C formed by welding the edge of the hole of the planar member are provided. The front edge welded portion 732A and the rear edge welded portion 732A are provided with a notch 734 that can be locked to the claw 65A of the mounting bracket 65 described above. The front bag body 731f and the rear bag body 731r are not in communication.

  The fabric body 71 and the bag body member 73 are connected by being sewn in a state where the terminal portion around the fabric body 71 and the hole edge welded portion 732C of the bag body 73 are overlapped in this order from below. ing. In the state where the fabric body 71 and the bag body member 73 are connected as described above, the front side bag body 731f is viewed from the front in a cross section obtained by cutting the center portion in the left-right direction of the pad support member 20 with a plane perpendicular to the left-right direction. The fabric body 71 and the rear bag body 731r are arranged in this order. That is, the fabric body 71 corresponds to a “planar body” in the claims. The dimensions of each part of the pad support member 20 are such that when the pad support member 20 is assembled to the cushion frame 10, the fabric body 71 and the bag body member 73 are stretched in the front-rear direction, and the fabric body. 71 is a dimension that passes directly under the sciatic nodule portion KT of the seated person D seated on the automobile seat 1.

  Further, a lower leg bag member 80 is disposed on the front side of the pad support member 20. The thigh bag member 80 is formed of a front bag body 81f and a rear bag body 81r by superposing two sheet-like members made of thermoplastic polyurethane resin on top and bottom and thermally welding them in a bag shape. It becomes the composition. The front bag body 81f and the rear bag body 81r are not in communication.

  The front bag body 731f and the rear bag body 731r of the bag body member 73 are connected to the first pump 911 having the same structure as the pump 51 of the first embodiment via separate air tubes 92, respectively. Each air tube 92 is connected to a first electric valve 931 having the same structure as the electric valve 53 of the first embodiment. Similarly, the front bag body 81f and the rear bag body 81r of the thigh lower bag body member 80 are provided with the same structure as the pump 51 and the first pump 911 of the first embodiment via separate air tubes 92, respectively. A second electric valve 932 having the same structure as the electric valve 53 of the first embodiment is connected to each of the air tubes 92 while being connected to the two pumps 912. And between the 1st pump 911 and each 1st electric valve 931, and between the 2nd pump 912 and each 2nd electric valve 932, it is the same as check valve 54 of a 1st embodiment. A structural check valve 94 is provided.

  Further, a lateral groove 62A extending in the left-right direction is formed in the vicinity of the rear end of the upper surface portion of the center front pad 32 of the cushion pad 30. A male fastener 626 extending in the left-right direction is bonded to the lateral groove 62A. A female surface fastener 616 extending in the left-right direction is sewn to a stitched portion between the support member cover 41 and the center front cover 42 of the cushion cover 40. In the second embodiment, the overlapping pad 414 is not bonded to the lower surface portion of the cover pad 411.

  A method of assembling the seat cushion 3 in the second embodiment will be described. First, the pad support member 20 is assembled to the cushion frame 10 by engaging the notch 734 of the pad support member 20 with the claw 65 </ b> A of the mounting bracket 65. At this time, the lower leg bag member 80 is placed on the front panel 12. Next, the cushion pad 30 is placed on the cushion frame 10 so that the center front pad 32 of the cushion pad 30 overlaps the thigh bag body member 80. Thereafter, the female fastener 616 of the cushion cover 40 is adhered to the male fastener 626 of the center front pad 32. Then, the hook member J of the cushion cover 40 is locked to the cushion frame 10. That's it.

  Based on FIG.5 and FIG.6, operation | movement of the pad support member 20 in 2nd Embodiment is demonstrated. In the initial state, the front bag body 731f and the rear bag body 731r are filled with a smaller amount of air than the limit amount as shown by the solid line in FIG. At this time, the first electric valve 931 and the first pump 911 are not energized. When the pad support member 20 is in the initial state, the tension generated in the pad support member 20 is relatively low. Therefore, when the seated person D sits on the vehicle seat 1, the seat comfort of the seat cushion 3 is relatively soft. It will be a thing. From the initial state, first, the first pump 911 is energized while the first electric valve 931 is not energized. Then, the compressed air from the first pump 911 is supplied to the front bag body 731f and the rear bag body 731r via the air tube 92. As a result, as shown by the two-dot chain line in FIG. 6, the front bag body 731f and the rear bag body 731r swell in the vertical direction from the initial state, and therefore the front bag body 731f and the rear bag body 731r have initial dimensions in the front-rear direction. It becomes shorter than the state. Thereby, the fabric body 71 is pulled in the front-rear direction, and the tension generated in the pad support member 20 is increased. When the tension generated in the pad support member 20 reaches the required magnitude, the first pump 911 is deenergized while the first electric valve 931 is deenergized, so that the tension can be maintained. In this state, since the tension generated in the pad support member 20 is higher than the initial state, the seat comfort of the seat cushion 3 is relatively hard. Thereafter, when the first electric valve 931 is energized, the air in the front bag body 731f and the rear bag body 731r flows into the air tube 92 and is discharged from the first electric valve 931. As a result, the front bag body 731f and the rear bag body 731r are deflated in the vertical direction, so that the front and rear bag bodies 731f and the rear bag body 731r have longer longitudinal dimensions. Thereby, the fabric body 71 is loosened and the tension generated in the pad support member 20 is lowered. When the front bag body 731f and the rear bag body 731r are deflated to the initial state, the first electric valve 931 is de-energized, and the front bag body 731f and the rear bag body 731r are in the initial state as shown by the solid line in FIG. Retained. The thigh bag member 80 can be similarly inflated or deflated by operating the second electric valve 932 and the second pump 912. By inflating or deflating the lower leg bag member 80, the repulsive force of the seat cushion 3 on the thigh of the seated person D seated on the vehicle seat 1 can be adjusted.

  Also in the second embodiment configured as described above, the tension generated in the pad support member 20 can be adjusted with a simple structure in which air is supplied to or discharged from the bag bodies 731f and 731r. Furthermore, the sitting pressure can be reduced at the position corresponding to the sciatic tubercle KT of the seated person D, and the sitting comfort can be improved. Furthermore, the seat cushion 3 can be thinned.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, the following can be mentioned.

  1. In the first embodiment and the second embodiment, the fabric bodies 21A, 21B, and 71 are manufactured from a woven fabric manufactured by weaving polyester yarn. However, the present invention is not limited to this, and the fabric bodies 21A, 21B, 71 may be manufactured by weaving cotton yarn into a plain weave, for example, as long as the fabric body 21A, 21B, 71 is a member having an elastic force suitable for elastically supporting the load of the seated person D. It can also be manufactured from other materials such as so-called canvas. Further, the fabric bodies 21A, 21B, and 71 may be knitted fabrics, nonwoven fabrics, or the like instead of the woven fabrics.

  2. In the first embodiment and the second embodiment, the cover pad 411 is used as the pad member. However, it is not limited to this, For example, the structure which uses a mold pad separate from the cushion cover 40 as a pad member may be sufficient.

  3. In the first embodiment and the second embodiment, the present invention is applied to the seat cushion 3. However, the present invention is not limited to this, and the present invention can also be applied to the seat back 2. That is, for example, as shown in FIG. 1, a pad support member extending in the left-right direction is stretched between the side frames 2A1 of the back frame 2A, and the back pad 2B is extended from the rear side by the pad support member. It can also be configured to support. In this configuration, a planar body of the pad support member is disposed in a portion corresponding to the scapula portion of the seated person D, and on both the left and right and / or the upper and lower sides of the portion corresponding to the shoulder blade portion of the seated person D. The pad support member bag may be disposed. In this configuration, in a state where the bag body is inflated in the front-rear direction, a portion of the back pad 2B corresponding to the shoulder blade of the seated person D, a portion of the pad support member corresponding to the shoulder blade of the seated person D, A space will be formed between them. For this reason, when the seated person D is seated on the vehicle seat 1, the back pad 2 </ b> B corresponding to the shoulder blade of the seated person D can bend rearward without being blocked by the pad support member. . Therefore, the seating pressure can be reduced at the position corresponding to the shoulder blade of the seated person D, and the sitting comfort can be improved. Furthermore, in this structure, the said bag body and the planar body of the part corresponding to the said scapula part are formed by the two planar members joined in the bag shape in the state piled up in the front-back direction. You can also. In this configuration, for example, the bag body is formed by the two sheet-like members, and the sheet-like body corresponding to the shoulder blade of the seated person D is separated from the two sheet-like members. The pad support member can be made simpler than the structure formed by these members.

  4). In the second embodiment, the two first electric valves 931 are switched between energization and non-energization at the same time, and the front bag body 731f and the rear bag body 731r are simultaneously inflated or deflated. However, the present invention is not limited to this, and each of the first electric valves 931 can be switched independently, and the front bag body 731f and the rear bag body 731r can be individually inflated or deflated. In the second embodiment, the thigh lower bag member 80 is similarly configured to inflate and deflate the front bag body 81f and the rear bag body 81r at the same time. The body 81f and the rear bag body 81r may be individually inflated or deflated.

  5. In the above-described embodiment, an example in which the present invention is applied to an automobile seat has been described. However, the present invention can also be attached to a seat mounted on an airplane, a ship, a train, or the like.

1 Car seat (vehicle seat)
11 Side frame (Seat frame component)
13 Front pipe (seat frame component)
14 Rear pipe (seat frame component)
20 Pad support member 21A Center side fabric body (planar body)
21B Terminal side fabric body (planar body)
231 bag body 232B belt-like welded portion (planar body)
411 Cover pad (pad member)
71 Fabric body (planar body)
731f Front bag (bag)
731r Rear bag (bag)

Claims (5)

A vehicle seat,
A pad support member that supports the pad member from the back side is stretched between a pair of oppositely extending seat frame constituent members,
The pad support member is formed by connecting a fabric-like planar body and a bag body in an in-plane direction,
When the bag body swells in the thickness direction of the planar body due to the supply of fluid, the tension generated in the pad support member is increased, and when the bag body is deflated in the thickness direction of the planar body due to fluid discharge, the pad A vehicle seat configured to reduce tension generated in a support member. In claim 1,
The pair of seat frame constituent members constitutes a cushion frame,
The pad support member supports the pad member from below,
In the portion corresponding to the sciatic nodule portion of the seated person seated on the vehicle seat, the planar body is disposed,
A vehicle seat in which the bag is disposed on the left and right and / or both front and rear sides of a portion corresponding to the sciatic nodule. In claim 2,
A vehicle seat in which the bag and the planar body corresponding to the sciatic tubercle are formed by two planar members that are partially joined while being stacked in the thickness direction. . In claim 1,
The pair of seat frame constituent members constitutes a back frame,
The pad support member supports the pad member from the rear side,
In the portion corresponding to the shoulder blade of the seated person seated on the vehicle seat, the planar body is disposed,
A vehicle seat in which the bag is disposed on the left and right and / or the upper and lower sides of the portion corresponding to the scapula. In claim 4,
A vehicle seat in which the bag and the planar body corresponding to the scapula are formed by two planar members that are partially joined while being stacked in the thickness direction. .

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