Vehicle seats

Abstract

To provide a vehicle seat that provides a comfortable seating experience. The vehicle seat S includes a seatback frame 30, a first back cover 40 provided in front of the seatback frame 30, a pressure-receiving member 60 attached to the first back cover 40, and a second back cover 50 provided behind the seatback frame 30 and having a rear opening 54 formed in a position overlapping the pressure-receiving member 60 in the seat front-rear direction. This makes it possible to provide a vehicle seat S that provides a comfortable seating experience.

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat having a seat back. [Background technology]

[0002] Patent Document 1 discloses a method for assembling a seat back assembly in which a front seat back module and a rear seat back module, which are pre-assembled, are interconnected around a seat back frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent No. 10046682 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of the vehicle seat described in Patent Document 1, the rear seatback module is attached to the seat frame on which the pressure-receiving member is provided so as to cover it from behind, so if the pressure-receiving member deflects under the seating load, there is a risk that the pressure-receiving member may interfere with the rear seatback module. If the pressure-receiving member interferes with the rear seatback module, the occupant may feel that the seat bottoms out, resulting in a problem of reduced seating comfort.

[0005] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat that provides a good seating feeling. [Means for solving the problem]

[0006] The above problem is solved by the vehicle seat of the present invention, which comprises a seat back frame, a first back cover provided in front of the seat back frame, a pressure-receiving member attached to the first back cover, and a second back cover provided behind the seat back frame and having a rear opening formed in a position overlapping with the pressure-receiving member in the fore-and-aft direction of the seat. With the above configuration, even if the pressure-receiving member is deflected by the seating load, the rear opening prevents it from interfering with the second back cover, and for example, it is possible to prevent the occupant from feeling like they are hitting the bottom, thereby providing a vehicle seat that provides a comfortable seating experience.

[0007] In the above configuration, the first back cover may have a front opening formed at a position overlapping the rear opening of the second back cover in the seat front-rear direction. With the above configuration, even if the pressure-receiving member is deformed, it does not interfere with the first back cover, thereby improving the seating comfort.

[0008] In the above configuration, the pressure-receiving member has a pressure-receiving main body and a wire member insert-molded into the pressure-receiving main body, and the wire member is preferably positioned so as to overlap the front opening of the first back cover and the rear opening of the second back cover in the seat fore-and-aft direction. With the above-described configuration, the rigidity of the pressure-receiving member can be improved.

[0009] In the above configuration, the wire member may have a protruding portion that protrudes rearward, and the protruding portion may be disposed within the rear opening of the second back cover. The above configuration prevents the protruding portion of the wire member from interfering with the edge of the rear opening of the second back cover.

[0010] In the above configuration, the pressure-receiving member has a recess that recesses toward the rear at a position opposite the occupant's spine, and a cutout portion that is formed to match the outer shape of the rear side of the recess is formed at the upper edge of the rear opening at a position opposite the recess. The above configuration can prevent interference between the spine of a seated occupant and the pressure-receiving member, and can also prevent interference between the pressure-receiving member and the second back cover.

[0011] In the above configuration, the pressure-receiving member may have a frame portion that overlaps with an edge of the front opening and an edge of the rear opening in the seat front-rear direction. With the above-described configuration, the boundary between the pressure-receiving member and the edge of the front opening can be filled in. Also, the boundary between the pressure-receiving member and the edge of the rear opening can be filled in.

[0012] In the above configuration, the frame portion of the pressure-receiving member has an upper end, a right side, and a left side, The entirety may be covered by an edge of the front opening and an edge of the rear opening when viewed from the rear. With the above-described configuration, the boundary between the pressure-receiving member and the edge of the opening can be filled.

[0013] In the above configuration, a gap may be formed between an upper portion of the frame portion of the pressure-receiving member and an upper edge of the rear opening. With the above configuration, interference between the pressure-receiving member and the second back cover can be suppressed.

[0014] In the above configuration, a lower portion of the wire member may be provided at a position overlapping a lower edge of the front opening in the seat front-rear direction. With the above configuration, the pressure-receiving member can be attached to the first back cover.

[0015] In the above configuration, a wire attachment portion for attaching a lower portion of the wire member may be provided on the lower edge of the front opening. With the above configuration, the pressure-receiving member can be attached to the first back cover. [Effects of the Invention]

[0016] According to the present invention, even if the pressure-receiving member is deflected by the seating load, the rear opening prevents interference with the second back cover, and for example, it is possible to prevent the occupant from feeling like they are hitting the bottom, thereby providing a vehicle seat that provides a comfortable seating experience. Furthermore, according to the present invention, even if the pressure-receiving member is deformed, it does not interfere with the first back cover, thereby improving the seating comfort. Furthermore, according to the present invention, the rigidity of the pressure-receiving member can be improved. Furthermore, according to the present invention, the protruding portion of the wire member is prevented from interfering with the edge portion around the rear opening of the second back cover. Furthermore, according to the present invention, interference between the spine of a seated occupant and the pressure-receiving member can be suppressed, and interference between the pressure-receiving member and the second back cover can be suppressed. Furthermore, according to the present invention, the boundary between the pressure-receiving member and the edge of the opening can be filled. Furthermore, according to the present invention, the pressure-receiving member can be attached to the first back cover. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view of a vehicle seat according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view of the vehicle seat as seen from diagonally rearward. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 2 is an exploded perspective view of the seat back module. [Figure 6] FIG. [Figure 7] FIG. 2 is a perspective view of the first back cover as seen from diagonally behind. [Figure 8] FIG. [Figure 9] 10 is a perspective view showing the relationship between a pressure-receiving plate, a first back cover, and a second back cover. FIG. [Figure 10] FIG. 4 is a rear view of the first back cover as seen from the rear. [Figure 11] FIG. 2 is a front view of the first back cover as seen from the front. [Figure 12] FIG. 10 is a front view showing the first back cover with the pressure plate removed. [Figure 13] FIG. [Figure 14] FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. [Figure 15] FIG. 2 is an enlarged perspective view of a portion of the seat back. DETAILED DESCRIPTION OF THE INVENTION

[0018] The configuration of a vehicle seat according to a first embodiment (present embodiment) of the present invention will be described below with reference to the drawings. However, the embodiment described below is an example for facilitating understanding of the present invention and is not intended to limit the present invention. In other words, the present invention may be modified or improved without departing from the spirit thereof, and of course, the present invention also includes equivalents thereof.

[0019] In the following, a vehicle seat S mounted on a ground vehicle having wheels, such as an automobile or train, will be taken as an example of a vehicle seat, and an example of its configuration will be described.

[0020] In the following description, the "seat front-rear direction" refers to the front-rear direction of the vehicle seat S, which is the direction that coincides with the traveling direction when the vehicle is traveling. The "seat width direction" refers to the width direction of the vehicle seat S, which is the direction that coincides with the left-right direction as seen by an occupant seated in the vehicle seat S. The "up-down direction" refers to the up-down direction of the vehicle seat S, which is the direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane. Furthermore, the shape, position, and posture of each part of the vehicle seat S described below will be described assuming that the vehicle seat S is in an occupant's seated position, unless otherwise specified.

[0021] <Basic configuration of vehicle seat S> The basic configuration of a vehicle seat S according to this embodiment will be described with reference to Figs. 1 to 6. Fig. 1 is a perspective view of the vehicle seat S as seen obliquely from the front, and Fig. 2 is a perspective view of the vehicle seat S as seen obliquely from the rear. Fig. 3 is an exploded perspective view of the seat cushion 1, and Fig. 4 is an exploded perspective view of the seat back 2. Fig. 5 is an exploded perspective view of the seat back module 2M. Fig. 6 is an exploded perspective view of the headrest 3. Note that in Fig. 1, for convenience of illustration, parts of the vehicle seat S are shown with the upholstery materials 1c, 2c, and 3b removed.

[0022] 1 and 2, the vehicle seat S according to this embodiment mainly comprises a seat cushion 1, a seat back 2, a headrest 3, a rail device 4, and a reclining device 5. A seat frame F that forms the framework of the seat cushion 1 and the seat back 2 is provided inside the seat cushion 1 and the seat back 2.

[0023] <<Seat cushion 1>> The seat cushion 1 is a support member that supports the buttocks of a seated occupant (hereinafter, sometimes referred to as a seated person), and supports the seated person from below. As shown in Fig. 3, the seat cushion 1 mainly comprises a seat cushion frame 10 that forms the framework of the seat cushion 1, and a seat cushion module 1M that is replaceably attached to the seat cushion frame 10.

[0024] The seat cushion frame 10 is a frame body having a rectangular shape when viewed from above. The seat cushion frame 10 has left and right side frames 11, a pan frame 12 connecting the front ends of the left and right side frames 11, and a rear connecting frame 13 connecting the rear ends of the left and right side frames 11. The seat cushion frame 10 also has a support plate 15 that is connected to the rear connecting frame 13 via elastic springs 14 and supported by the left and right side frames 11. The support plate 15 is a pressure-receiving member that receives the load of a seated occupant applied via a seat cushion module 1M (described later), and is elastic and configured to bend downward.

[0025] Cushion module assembly portions 16 are provided on both sides of the pan frame 12 in the seat width direction. The cushion module assembly portions 16 can be connected to assembly portions 24 formed on a cushion base cover 20 of a seat cushion module 1M (described later). This makes it possible to assemble the seat cushion module 1M to the seat cushion frame 10 in a replaceable manner.

[0026] <Seat cushion module 1M> The seat cushion module 1M mainly comprises a cushion base cover 20, a first padding material 1a, a second padding material 1b, and a covering material 1c. The seat cushion module 1M is attached to a seat cushion frame 10 to function as a seat portion of the vehicle seat S. The seat cushion module 1M is also removable and replaceable, and by replacing it, the design and function of the vehicle seat S can be changed. Therefore, the vehicle seat S can be configured to be optimal according to the needs of each seat occupant.

[0027] The cushion base cover 20 has a rectangular shape in top view and includes left and right cover side portions 21, a cover front portion 22, and a cover rear portion 23. The cover front portion 22 is provided with an assembly portion 24 for fixing the cushion base cover 20 to the pan frame 12, and the cover rear portion 23 is provided with a frame detachable portion 25 that detachably engages with the rear connecting frame 13. The cushion base cover 20 can be attached to the seat cushion frame 10 by engaging the frame detachable portion 25 with the rear connecting frame 13 and fixing the assembly portion 24 to the pan frame 12. In this embodiment, the cushion base cover 20 is made of resin. The cushion base cover 20 may also be made of metal.

[0028] A control device 90 is attached below the cushion base cover 20 via a bracket 91. The control device 90 is called an ECU (Electronic Control Unit) and controls various sensors and electrical components mounted on the vehicle or the vehicle seat S. For example, the control device 90 acquires an output signal from a detection sensor (such as a temperature sensor) mounted on the vehicle, and controls a blower device 100 and a seat heater 110 (described later) based on the output signal, thereby improving the comfort of the occupant seated in the vehicle seat S.

[0029] The first pad material 1a and the second pad material 1b are cushion materials placed on the cushion base cover 20 and cover the cushion base cover 20. The first pad material 1a and the second pad material 1b are made of foamed resin molded bodies having different properties (breathability and flexibility). By stacking multiple foamed resin molded bodies having different properties, it is possible to improve seating comfort and comfort while reducing manufacturing costs and the thickness of the cushion base cover 20, for example. The first pad material 1a placed on the cushion base cover 20 is made of a three-dimensional network fiber structure such as BreathAir (registered trademark). The second pad material 1b is made of a urethane resin (foamed resin) such as soft polyurethane foam. The second pad material 1b may also be made of biomass urethane. After the first padding material 1a is placed on the cushion base cover 20, the second padding material 1b is placed thereon. The second padding 1b is covered with a skin 1c, which may be made of a stretchable synthetic leather material, for example, or may be made of cloth, film, leather, or the like.

[0030] <<Seat back 2>> The seat back 2 is a support member that supports the back of a seated occupant from behind. As shown in Fig. 4, the seat back 2 has a seat back frame 30 that forms the framework of the seat back 2, a seat back module 2M that is replaceably attached to the seat back frame 30 from the front of the seat back frame 30, and a second back cover 50 that covers the seat back 2 from the rear.

[0031] The seatback frame 30 is a frame body having a generally rectangular shape in a front view. The seatback frame 30 has backside frames 31 arranged on the left and right, an upper frame 32 connecting the upper ends of the left and right backside frames 31, and a lower frame 33 connecting the lower ends of the left and right backside frames 31.

[0032] The backside frames 31 are elongated frame members that extend vertically and are arranged apart from each other while facing each other in the seat width direction. Each backside frame 31 is an angle bar formed by bending a plate-like member vertically. The front edges of the backside frames 31 are bent outward to improve their strength. A reclining body 5a, a back rotation shaft 5b, and a spiral spring 5c ​​of the reclining device 5, which will be described later, are attached to the lower end of the back side frame 31.

[0033] The upper frame 32 is a frame material having a substantially inverted U shape, and connects the upper ends of the left and right back side frames 31. The upper frame 32 is made of a metal round pipe material. The upper frame 32 may also be made of resin. The upper frame 32 is provided with four module assembly parts 34 arranged at substantially equal intervals from one another. The module assembly parts 34 protrude outward from the upper frame 32, and are assembled to a cover assembly part 45 provided on the first back cover 40 and an assembly part 55 provided on the second back cover 50 by being connected and fixed thereto.

[0034] The lower frame 33 is a long frame member extending laterally, and connects the lower ends of the left and right back side frames 31. The lower frame 33 has a recess formed by bending a plate-like member so as to be recessed downward. The back rotation shaft 5b of the reclining device 5, which will be described later, is housed inside the recess.

[0035] <Seatback Module 2M> 5, the seatback module 2M mainly comprises a first back cover 40, a pressure-receiving plate 60, a first padding material 2a, a second padding material 2b, a seat heater 110, and an upholstery material 2c. As described above, the seatback module 2M is attached to the seatback frame 30 to function as the backrest of the vehicle seat S. By removing and replacing the seatback module 2M, the design and function of the vehicle seat S can be easily changed, and an optimal vehicle seat S can be configured to meet the needs of each individual seated occupant.

[0036] The first back cover 40 is a cover member that supports electrical components provided in the seat back module 2M and protects the electrical components by covering them from behind. Examples of electrical components provided in the seat back module 2M include a blower device 100, an electric motor 108, and a seat heater 110. Although not shown, an air cell or an airbag device may also be provided.

[0037] The first back cover 40 has a resin cover body 40a, and a first opening 44 is formed in the approximate center of the cover body 40a (see FIG. 9). The cover body 40a has external dimensions slightly larger than the seat back frame 30 (see FIG. 10). On the back side, a back reinforcing rib 40b that improves the strength of the cover body 40a and a cover assembly part 45 that is fixed to the module assembly part 34 of the seat back frame 30 are provided.

[0038] A pressure-receiving plate 60 that receives the load of a seated occupant is provided on the front side of the first back cover 40. The pressure-receiving plate 60 is provided so as to cover the first opening 44 formed in the cover main body 40a. In other words, the first opening 44 formed in the cover main body 40a is formed in a position facing the pressure-receiving plate 60. Therefore, when the load of the seated occupant is applied to the pressure-receiving plate 60, the pressure-receiving plate 60 can deform rearward in accordance with the posture of the seated occupant's back and waist. The cover body 40a has left and right cover side portions 41 on the outer sides in the seat width direction of the first opening 44. The cover body 40a also has an upper cover portion 42 above the first opening 44 and a lower cover portion 43 below it.

[0039] The left and right cover side portions 41 extend in the vertical direction and are recessed rearward on the inside. The left and right cover side portions 41 are connected to the plate mounting portion 61 of the pressure-receiving plate 60 to support the left and right side edges of the pressure-receiving plate 60. An electric motor 108 is attached to the back side of the cover side portion 41, which is located on the right side when viewed from the front, and is supported by the cover side portion 41.

[0040] As shown in Fig. 5, the cover upper portion 42 has a mountain-like shape that protrudes upward, and its ends in the seat width direction connect the upper ends of the left and right cover side portions 41. A bracket 46 to which the headrest 3 is attached is provided at the upper end of the cover upper portion 42. The bracket 46 has a protrusion 46c that protrudes forward from the cover upper portion 42. The headrest 3 is configured to be fixed at the upper end of the seat back 2 in a state where it protrudes forward from the seating surface 2d of the seat back 2.

[0041] 5, a blower device 100 that generates an air flow is attached near the center of the cover upper portion 42. The seat back module 2M is configured so that the blower device 100 draws air from the seating surface 2d side of the seat back 2 (from the front of the seat) and blows the air downward at the back side of the seat back 2.

[0042] The cover lower portion 43 extends in the seat width direction, and its ends in the seat width direction connect the lower ends of the left and right cover side portions 41. The cover lower portion 43 supports the lower end of the pressure-receiving plate 60. Front reinforcing ribs 40c for improving the strength of the first back cover 40 are provided on the front sides of the cover side portions 41, the cover upper portion 42, and the cover lower portion 43.

[0043] The first padding material 2a and the second padding material 2b are cushioning materials placed on the first back cover 40 to cover the first back cover 40. The first padding material 2a and the second padding material 2b are foamed resin molded bodies having different properties (breathability and flexibility). In this embodiment, the first padding material 2a is configured to have higher breathability than the second padding material 2b, and the second padding material 2b is configured to have higher flexibility than the first padding material 2a. The first padding material 2a is made of a three-dimensional network fiber structure such as BreathAir (registered trademark). The second padding material 2b is made of a urethane resin (foamed resin) such as soft polyurethane foam. The second padding material 2b may also be made of biomass urethane.

[0044] After the first padding material 2a is placed on the first back cover 40, the second padding material 2b is attached to the first back cover 40 with the seat heater 110 sandwiched therebetween. The second padding 2b is covered with a skin 2c, which may be made of a stretchable synthetic leather material, or may be made of cloth, film, leather, or the like.

[0045] The first pad material 2a is formed with a blower covering portion 2aa facing the blower device 100, and an empty space capable of supplying air to an area facing the suction port 102 of the blower device 100 is provided. The first padding 2a and the second padding 2b are laminated together and covered with a skin 2c, which may be made of a stretchable synthetic leather material, or may be made of cloth, film, leather, or the like.

[0046] <Second back cover 50> The second back cover 50 will be described with reference to Figure 4. The second back cover 50 is disposed behind the seat back frame 30 and attached so as to cover the entire seat back frame 30 from behind. The second back cover 50 is a cover member made of resin. The seat back 2 is completed when the second back cover 50 and the seat back module 2M are fixed together with the seat back frame 30 sandwiched between them in the front-rear direction.

[0047] The second back cover 50 has a cover body 50a, and a second opening 54 is formed in approximately the center of the cover body 50a. The cover body 50a protects the seat back module 2M by covering the first back cover 40 from the rear, and also serves to improve the strength of the seat back 2. An assembly portion 55 is provided on the front side of the second back cover 50 to be fixed to the module assembly portion 34 of the seat back frame 30. A plurality of ribs may also be provided inside the cover body 50a.

[0048] The second opening 54 is formed at a position and with dimensions approximately equal to those of the first opening 44 of the first back cover 40, allowing the pressure plate 60 to deform rearward in accordance with the posture of the occupant's back and waist when the weight of the occupant is applied to the pressure plate 60. In other words, when the pressure plate 60 is deformed rearward, the deformed portion passes through the inside of the first opening 44 and the second opening 54, so the deformation is not obstructed, and the occupant is prevented from feeling the pressure plate 60 bottom out.

[0049] The cover main body 50a has left and right cover side portions 51 on both sides of the second opening 54 in the seat width direction, an upper cover portion 52 above, and a lower cover portion 53 below. The left and right cover side portions 51, upper cover portion 52, and lower cover portion 53 of the second back cover 50 respectively cover the left and right cover side portions 41, upper cover portion 42, and lower cover portion 43 of the first back cover 40 from behind.

[0050] <<Headrest 3>> The headrest 3 is a support member that supports the head of a seated occupant from behind. As shown in Fig. 6, the headrest 3 mainly comprises a headrest frame 70 that forms the skeleton of the headrest 3, a padding material 3a, a covering material 3b (see Fig. 1), and a headrest cover 80.

[0051] The headrest frame 70 is a plate-like member having a substantially rectangular shape in a front view, and includes a frame main body 71 and an outer edge flange 72 that is bent rearward at the outer edge of the frame main body 71 relative to the frame main body 71. A bracket assembly portion 73 that is attached to the bracket 46 of the seat back module 2M is provided in the center of the frame main body 71, and is fixed to the bracket 46 by inserting a fastener 75 into a through-hole formed in the bracket assembly portion 73.

[0052] Furthermore, cover assembly parts 74 are provided at the four corners (upper right, upper left, lower right, and lower left) of the frame main body 71, to which a headrest cover 80 that covers the rear of the headrest frame 70 is attached. The headrest frame 70 and the headrest cover 80 are assembled by the cover assembly parts 74 engaging with assembly parts 84 provided on the headrest cover 80.

[0053] The headrest cover 80 covers the headrest frame 70 from behind, and forms the outer shell of the headrest 3 by being attached to the headrest frame 70. The headrest cover 80 has approximately the same outer dimensions as the headrest frame 70, and includes a cover main body 81 and an outer edge flange 82 that is bent forward relative to the cover main body 81 at the outer edge of the cover main body 81.

[0054] An attachment opening 83 is formed in the approximate center of the headrest cover 80, allowing the protrusion 46c of the bracket 46 to pass through. When the bracket 46 passes through the attachment opening 83, the bracket 46 and the bracket assembly portion 73 of the headrest frame 70 are connected, and the headrest 3 can be attached to the first back cover 40 of the seat back module 2M.

[0055] Additionally, at the four corners (upper right, upper left, lower right, and lower left) of the headrest cover 80, there are provided assembly portions 84 for assembling the headrest cover 80 to the headrest frame 70. The assembly portions 84 protrude forward and can be engaged with the cover assembly portions 74 of the headrest 3.

[0056] The padding 3a is a cushioning material that covers the front of the headrest frame 70. The padding 3a is made of a foamed resin molded body. More specifically, it is made of a urethane resin such as soft polyurethane foam. The padding 3a may also be made of biomass urethane. The skin material 3b is made of a stretchable synthetic leather material and covers the padding 3a.

[0057] <<Rail device 4>> As shown in Fig. 1, the rail device 4 is a device that connects the vehicle seat S to the floor of the vehicle so that the seat can slide in the front-to-rear direction. As shown in Fig. 1, the rail device 4 is provided below the vehicle seat S. The rail device 4 has a known structure (the structure of a general slide rail mechanism). In detail, the rail device 4 has a lower rail 4a fixed to the floor and an upper rail 4b that can slide in the front-to-rear direction relative to the lower rail 4a.

[0058] The rail device 4 also includes a locking member 4c that locks the upper rail 4b against sliding movement relative to the lower rail 4a. The upper rail 4b is normally locked by the locking member 4c in a state where it cannot slide relative to the lower rail 4a. When the passenger performs a predetermined operation, the upper rail 4b transitions to an unlocked state where it can slide relative to the lower rail 4a. The locking member 4c has a known locking mechanism.

[0059] <<Reclining device 5>> The reclining device 5 has a reclining main body 5a, a back rotation shaft 5b, and a spiral spring 5c, and connects the seat back 2 to the seat cushion 1 so that the seat back 2 can rotate about the back rotation shaft 5b. As shown in FIG. 4, the reclining device 5 is provided below the seat back frame 30. The reclining device 5 can displace the seat back 2 between an upright position in which the seat back 2 is upright, a forward-tilted position in which the seat back 2 is tilted forward, and a rearward-tilted position in which the seat back 2 is tilted backward.

[0060] <<Blower device 100>> As shown in Fig. 5, the blower device 100 has a blower body 101, an inlet 102 formed in front of the blower body 101, and an outlet 103 formed below the blower body 101 and having an opening on the left side. In other words, by rotating the blower body 101, the blower device 100 draws air from the front (from the seating surface 2d toward the inlet 102) and generates an airflow that flows downward (from the cover upper portion 42 toward the first opening 44). This allows, for example, air around a seated person to be drawn in from the seating surface 2d and discharged downward from the vehicle seat S, thereby improving the comfort of the occupant sitting in the vehicle seat S. In addition, a blower connection cable extends from the blower device 100 and is connected to the control device 90.

[0061] <Pressure Plate 60> The pressure-receiving plate 60 will be described with reference to Figs. 5 to 15. As described above, the seat back 2 of the vehicle seat S includes the seat back frame 30, the seat back module 2M provided in front of the seat back frame 30, and the second back cover 50 provided behind the seat back frame 30. As shown in Fig. 5, the seat back module 2M mainly includes a first back cover 40, a pressure-receiving plate 60, a first padding material 2a, a second padding material 2b, a seat heater 110, and an upholstery material 2c. That is, the first back cover 40 of the seat back module 2M is provided in front of the seat back frame 30. The pressure-receiving plate 60 is attached to the first back cover 40.

[0062] 8 and 9, a second opening 54 is formed in the center of the second back cover 50 at a position that overlaps with the pressure-receiving plate 60 attached to the first back cover 40 in the seat front-rear direction when the second back cover 50 is attached to the seat back frame 30. The second opening 54 corresponds to the rear opening of the present invention. Since the second opening 54 is formed in the second back cover 50, the pressure plate 60 can be seen through the second opening 54 when viewed from the rear, as shown in Figures 2 and 8.

[0063] In conventional vehicle seats, the cover disposed at the rear does not have an opening formed behind the pressure plate, so when the pressure plate bends rearward under the seating load, it interferes with the cover, causing the occupant to feel the bottom out. In this embodiment, the second opening 54 is formed, so even when the pressure plate 60 bends rearward under the seating load, the pressure plate 60 does not interfere with the second back cover 50, preventing the occupant from feeling the bottom out. This improves the seating comfort of the vehicle seat S.

[0064] As shown in FIG. 9, the first back cover 40 has a first opening 44 formed at a position overlapping the second opening 54 of the second back cover 50 in the seat front-rear direction. The first opening 44 corresponds to the front opening of the present invention. The pressure-receiving plate 60 is fixed by engaging plate mounting portions 61 provided on the left and right sides of the pressure-receiving plate 60 with edge portions 48 of the first opening 44. More specifically, the pressure-receiving plate 60 is fastened and fixed to both side edges (right edge portion 48b and left edge portion 48d) of the first opening 44 with a plurality of fastening members, for example, bolts. The pressure-receiving plate 60 is also fixed to the lower edge portion 48c of the first opening 44 by a lower portion 63d of an insert-molded wire member 63, which will be described later. The first opening 44 is formed to overlap the second opening 54 in the seat front-rear direction. Therefore, even when the pressure-receiving plate 60 is deformed by the seating load, interference between the first back cover 40 and the second back cover 50 is suppressed.

[0065] <Wire member 63> The pressure-receiving plate 60 includes a resin pressure-receiving plate main body 62 (pressure-receiving portion main body), and a metal wire member 63 insert-molded into the pressure-receiving plate main body 62. As shown in Fig. 12, the wire member 63 is disposed at a position overlapping with the first opening 44 of the first back cover 40 in the seat front-rear direction. The wire member 63 is also disposed at a position overlapping with the second opening 54 of the second back cover 50 in the seat front-rear direction. A lower portion 63d of the wire member 63 is exposed from the pressure-receiving plate main body 62, and is fixed by attaching the lower portion 63d of the wire member 63 to a wire attachment portion 47 provided on the lower edge portion 48c of the first opening 44. The wire attachment portion 47 is formed, for example, by a clip with a C-shaped cross section.

[0066] 12, the wire member 63 is composed of two vertical members 63a extending in the up-down direction (longitudinal direction) and two horizontal members 63b extending in the seat width direction (left-right direction). The upper ends of the vertical members 63a and the horizontal members 63b are not directly connected to the edge portion 48 of the first opening 44, but are inserted into the pressure-receiving plate main body 62 and serve as the framework of the pressure-receiving plate 60.

[0067] As shown in Figures 7 and 15, the wire member 63 has a protruding portion 63c that protrudes rearward from the main rear surface of the pressure-receiving plate main body 62. The protruding portion 63c is configured to be disposed within the second opening 54 (inside the rear opening) of the second back cover 50 when the seat back module 2M and the second back cover 50 are assembled to the seat back frame 30. Providing the protruding portion 63c can improve the rigidity of the pressure-receiving plate 60. Furthermore, by disposing the protruding portion 63c within the second opening 54, interference with the edge portion 58 of the second opening 54 of the second back cover 50 is suppressed.

[0068] The pressure plate 60 (more specifically, the pressure plate main body 62) has a recess 64 that passes through the center in the seat width direction and extends in the up-down direction. The recess 64 is formed so as to recess rearward from the seating surface 2d side of the pressure plate 60. In other words, the recess 64 is formed so as to recess rearward at a position opposite the spine of the seated occupant. The formation of the recess 64 prevents the spine of the seated occupant from interfering with the pressure plate 60.

[0069] In addition, the outer shape of the rear side of the recess 64 forms a convex portion that protrudes rearward. In this embodiment, a notch portion 58aa is formed in the upper edge portion 58a of the second back cover 50 to match the shape of the outer shape (convex portion) of the rear side of the recess 64 (see FIG. 15). By providing the notch portion 58aa, it is possible to prevent the pressure-receiving plate 60 from interfering with the second back cover 50.

[0070] The pressure plate 60 has a frame portion 65. The frame portion 65 is composed of an upper end portion 65a, a right side portion 65b, a lower end portion 65c, and a left side portion 65d of the pressure plate main body 62. The frame portion 65 of the pressure plate 60 is provided so as to overlap with the edge portion 48 of the first opening 44 in the seat front-rear direction. In addition, as shown in FIG. 8, the frame portion 65 is provided so as to overlap with the edge portion 58 of the second opening 54 in the seat front-rear direction.

[0071] 10, the upper end 65a, right side 65b, and left side 65d that constitute the frame portion 65 are entirely covered by the edge 48 of the first opening 44 in a rear view. As shown in FIG. 8, the upper end 65a, right side 65b, and left side 65d are entirely covered by the edge 58 of the second opening 54 in a rear view. In other words, when viewed from the rear, the entire upper end 65a overlaps with the upper edge 58a of the second opening 54, the entire right side 65b overlaps with the right edge 58b, and the entire left side 65d overlaps with the left edge 58d.

[0072] In addition, the lower end portion 65c that constitutes the frame portion 65 of the pressure-receiving plate 60 is partially covered by the edge portion 48 (lower edge portion 48c) of the first back cover 40 and the edge portion 58 (lower edge portion 58c) of the second back cover 50. By covering the frame portion 65 with the edge 48 of the first opening 44 and the edge 58 of the second opening 54, for example, it is possible to eliminate (fill in) the boundary between the pressure plate 60 and the first opening 44 and the second opening 54. Furthermore, a plurality of through holes 66 are formed in the pressure plate main body 62 on the inside of the frame portion 65. By forming the through holes 66, it is possible to reduce the weight.

[0073] 14, a gap G is formed between the upper end 65a of the frame portion 65 of the pressure-receiving plate 60 and the upper edge 58a of the second opening 54. The formation of the gap G makes it possible to suppress interference between the pressure-receiving plate 60 and the second back cover 50. Air generated by the blower device 100 may be discharged from the gap G.

[0074] As an embodiment of the present invention, a vehicle seat S to be mounted in a vehicle has been described above, and an example of its configuration has been explained using the drawings. However, the present invention is not limited to seats mounted in ground vehicles having wheels such as automobiles and trains, and may also be applied to seats mounted in aircraft, ships, and other vehicles that move on non-ground surfaces, for example. [Explanation of symbols]

[0075] S vehicle seat Front seat frame 1 seat cushion 1a First pad material 1b Second pad material 1c Skin material 1M Seat Cushion Module 2 seat backs 2a First pad material 2aa Blower coating 2b Second pad material 2c Skin material 2d seating surface 2M Seatback Module 3 Headrest 3a padding material 3b Skin material 4 Rail device 4a Lower rail 4b upper rail 4c Locking member 5 Reclining device 5a Reclining unit 5b Back rotation axis 5c spiral spring 10 Seat cushion frame 11 Side frame 12 Pan Frame 13 Rear connecting frame 14 Elastic spring (elastic member) 15 Support Plate 16 Cushion module assembly section 20 Cushion base cover 21 Cover side part 22 Front part of cover 23 Rear part of cover 24 Assembly section 25 Frame attachment / detachment part 30 Seat back frame 31 Backside Frame 32 Upper frame 33 Lower frame 34 Module assembly section 40 1st back cover 40a Cover body 40b Back reinforcement rib 40c front reinforcement rib 41 Cover side part 42 Upper part of cover 43 Lower part of cover 44 1st opening (front opening) 45 Cover assembly part 46 Bracket 46a Front part 46b Bracket through hole 46c protrusion 47 Wire attachment part 48 Edge 48a Upper edge 48b Right edge 48c lower edge 48d Left edge 49 Through Hole 50 Second back cover 50a Cover body 51 Cover side part 52 Upper part of cover 53 Lower part of cover 54 Second opening (rear opening) 55 Assembly section 58 Edge 58a Upper edge 58aa Notch 58b Right edge 58c lower edge 58d Left edge 60 Pressure plate (pressure receiving member) 61 Plate mounting part 62 Pressure receiving plate body (pressure receiving part body) 63 Wire material 63a Vertical member 63b Horizontal member 63c protrusion 63d lower part 64 recess 65 Frame part 65a Upper end 65b Right side 65c lower end 65d left side 66 Through hole 70 Headrest frame 71 Frame body 72 Outer flange 73 Bracket assembly part 74 Cover assembly part 75 Fasteners 80 Headrest Cover 81 Cover body 82 Outer flange 83 Mounting opening 84 Assembly section 90 Control device 91 Bracket 100 Blower unit 101 Blower body 102 Intake port 103 Air outlet 108 Electric Motor 110 Seat heater G Gap

Claims

1. A seat back frame, a first back cover provided in front of the seat back frame; a pressure-receiving member attached to the first back cover; a second back cover provided behind the seat back frame and having a rear opening formed at a position overlapping with the pressure-receiving member in the seat front-rear direction;

2. 2. The vehicle seat according to claim 1, wherein the first back cover has a front opening formed at a position overlapping the rear opening of the second back cover in the seat front-rear direction.

3. the pressure-receiving member has a pressure-receiving body and a wire member insert-molded into the pressure-receiving body, The vehicle seat according to claim 2, wherein the wire member is positioned so as to overlap the front opening of the first back cover and the rear opening of the second back cover in the seat front-rear direction.

4. 4. The vehicle seat according to claim 3, wherein the wire member has a protruding portion that protrudes rearward, and the protruding portion is disposed within the rear opening of the second back cover.

5. the pressure-receiving member has a recess that is recessed rearward at a position facing the spine of the occupant, The vehicle seat according to claim 2, characterized in that a cutout portion is formed at the upper edge of the rear opening at a position facing the recess, the cutout portion being formed to match the outer shape of the rear side of the recess.

6. 3. The vehicle seat according to claim 2, wherein the pressure-receiving member has a frame portion that overlaps an edge of the front opening and an edge of the rear opening in the seat front-rear direction.

7. The upper end, right side and left side of the pressure-receiving member constituting the frame portion are 7. The vehicle seat according to claim 6, wherein the vehicle seat is entirely covered by the edge of the front opening and the edge of the rear opening when viewed from behind.

8. 7. The vehicle seat according to claim 6, wherein a gap is formed between an upper portion of the frame portion of the pressure-receiving member and an upper edge of the rear opening.

9. 4. The vehicle seat according to claim 3, wherein a lower portion of the wire member is provided at a position overlapping a lower edge of the front opening in the seat front-rear direction.

10. 10. The vehicle seat according to claim 9, wherein a wire attachment portion for attaching a lower portion of the wire member is provided at the lower edge of the front opening.

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