Vehicle seat cushion and vehicle seat

Abstract

To ensure good seating comfort by preventing a crewman's body from wobbling.SOLUTION: In a seat cushion 12 of a vehicle seat 10, a spring unit 34 is located on a lower side of a cushion pad 30, and the spring unit 34 is provided with a spring body 50 having a rebound resilience modulus higher than the cushion pad 30. The spring body 50 has both ends in a front-back direction locked to the cushion pad 30, and tightly contacts and covers an undersurface of the cushion pad 30. Consequently, an apparent bound resilience modulus of the cushion pad 30, which is felt by the crewman when seating can be increased, and when the crewman seats and the cushion pad is deformed downward, deformation of the cushion pad is suppressed and the rebound resilience modulus is increased, whereby the crewman's body is prevented from wobbling and good seating comfort can be ensured.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a seat cushion for a vehicle and a vehicle seat. [Background technology]

[0002] Patent Document 1 discloses a vehicle seat. In this vehicle seat, a front rod and a rear rod are arranged in pairs on a cushion frame of a seat cushion. The seat cushion also includes a seat pad made of a synthetic resin material having elasticity such as polyurethane foam, and the seat pad is arranged between the front rod and the rear rod.

[0003] The seat cushion also includes a cloth spring, and the cloth spring has a thin, sheet-like cloth spring body supported by a front rod and a rear rod. As a result, when an occupant sits in the vehicle seat, the cloth spring body is bent downward by the load, suppressing displacement of the occupant's posture. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-69668 Summary of the Invention [Problem to be solved by the invention]

[0005] In the field of vehicle seats, biopolyols and the like are being used in seat pads, etc., based on the carbon-neutral concept. Biopolyols are prepared by modifying vegetable oils, and are believed to be able to reduce greenhouse gas emissions compared to polyols derived from petroleum resources.

[0006] However, seat pads using biopolyols and the like have low resilience, and the seat pads deform significantly, which can easily cause a bottoming-out sensation, resulting in poor seating comfort. Furthermore, the use of biopolyols and the like in vehicle seats makes it difficult to suppress the body swaying of the occupant as the vehicle moves, and there is a need to improve the seating comfort of vehicle seats due to the body swaying of the occupant.

[0007] The present invention has been made in view of the above-mentioned circumstances, and aims to provide a vehicle seat cushion and a vehicle seat that can prevent the occupant's body from wobbling and ensure good sitting comfort, even if the cushion pad is made of bio-polyurethane or the like. [Means for solving the problem]

[0008] According to the first aspect of the present invention A seat cushion for a vehicle includes a cushion pad for supporting the buttocks and thighs of an occupant, and a spring body that is disposed in close contact with the underside of the cushion pad by engaging with a lower surface of a peripheral edge of the cushion pad on both sides in the front-rear direction of the seat or both sides in the left-right direction of the seat, the spring body having a higher resilience rate than the cushion pad, and that suppresses deformation of the cushion pad when the cushion pad is deformed downward. a connecting member disposed at each of the front and rear ends of the spring body, the connecting member having wing portions directed obliquely upward on both sides in the left-right direction of the seat, the spring body being connected to a center portion between the wing portions; and a locking means for locking each of the connecting members to the cushion pad and locking the spring body together with the connecting member to the cushion pad. Includes.

[0009] According to the first aspect In a vehicle seat cushion, a spring body is arranged on the underside of a cushion pad that supports the buttocks and thighs of an occupant to suppress deformation of the cushion pad. The spring body is engaged with the peripheral portion of the underside of the cushion pad on both sides in the front-rear direction of the seat or both sides in the left-right direction of the seat, and is in close contact with the underside of the cushion pad. When an occupant sits on the seat and the cushion pad is deformed downward, the spring body is elastically stretched.

[0010] Here, the rebound resilience is the rebound resilience in the direction of the applied load, and is an index showing the rebound resilience, rigidity, or strength, and indicates the degree of elasticity and resilience. When the cushion pad has low rebound resilience, it sinks significantly and has low resilience when the load is reduced. The rebound resilience of the spring body is set to be higher than that of the cushion pad.

[0011] As a result, when an occupant sits on the cushion pad, the occupant can feel the resilience according to the resilience modulus of the spring body, and the spring body suppresses the elastic deformation of the cushion pad, preventing the occupant's body from wobbling and ensuring a comfortable sitting experience.

[0012] According to the second aspect Vehicle seat cushions are First Aspect In the cushion pad, the cushion pad protrudes downward from the peripheral edge of the lower surface toward the center of the lower surface.

[0013] According to the second aspect In a vehicle seat cushion, the underside of the cushion pad covered by the spring body protrudes downward from the peripheral edge of the underside toward the center of the underside. Therefore, the spring body has a concave shape corresponding to the underside of the cushion pad, and can precisely cover the underside of the cushion pad (without misalignment) and elastically support the cushion pad so that it effectively generates rebound elasticity.

[0014] According to the third aspect Vehicle seat cushions are First or second aspect In the seat, both ends of the spring body in the front-rear direction of the seat are engaged with the cushion pad.

[0015] According to the third aspect In a vehicle seat cushion, the spring body is engaged with a cushion pad at the front and rear of the seat in the longitudinal direction. This effectively suppresses the longitudinal movement of the occupant's body when the occupant sits on the cushion pad. To engage the spring body in this manner, rigid members such as insert wires may be provided at the front and rear of the cushion pad, and the spring body may be engaged with the rigid members.

[0017] Here, according to this embodiment In a vehicle seat cushion, a connecting member is connected to each of the front and rear ends of a spring body. The connecting member has wing portions that face diagonally upward on both left-right sides of the seat, and the spring body is connected to a center portion between the wing portions. The connecting member also has a connecting means on the side opposite the spring body, and the connecting member is engaged with a cushion pad by an engaging means, thereby engaging the spring body with the cushion pad.

[0018] This allows the spring body to elastically support the cushion pad in the left-right direction of the seat, thereby suppressing the occupant's body from shaking in the left-right direction of the seat.

[0019] According to the fourth aspect The vehicle seat is Any one of the first to third aspects The seat cushion includes a seat cushion, a backrest for supporting the back of an occupant, a seat frame for supporting the cushion pad on which the spring body is arranged in the seat cushion, and an elastic member provided on the seat frame and capable of elastically supporting the cushion pad.

[0020] According to the fourth aspect In a vehicle seat, an elastic member is provided on a seat frame to which a cushion pad is attached, and the elastic member elastically supports the cushion pad on which a spring body is provided. This allows the cushion pad to be effectively elastically supported by the spring body and the elastic member, making the seating comfortable for the occupant. [Effects of the Invention]

[0021] As described above, in the vehicle seat cushion and vehicle seat of the present invention, the rebound elasticity of the cushion pad felt by the seated occupant can be increased, thereby preventing the occupant's body from shaking and ensuring good sitting comfort. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective view showing a schematic configuration of a vehicle seat according to an embodiment of the present invention; [Figure 2] 3 is a schematic cross-sectional view showing a main part of a seat cushion as viewed in the vehicle width direction. FIG. [Figure 3] 2 is a schematic cross-sectional view showing a main part of a seat cushion as viewed in the front-rear direction of the vehicle. FIG. [Figure 4] FIG. 2 is a perspective view showing an example of a spring unit arranged in a seat cushion. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a perspective view of a schematic configuration of a vehicle seat 10 according to this embodiment. The vehicle seat 10 according to this embodiment is used for seating an occupant in various types of vehicles such as a vehicle. In each drawing, the front, left, and top of the vehicle seat 10 are indicated by arrows FR, LH, and UP, respectively. In the following description, the terms front, back, top, bottom, and left and right refer to the front, back, top, bottom, and left and right of the vehicle seat 10 unless otherwise specified. In addition, in the following description, some reference numerals and their descriptions are omitted to make the drawings easier to understand.

[0024] As shown in FIG. 1, a vehicle seat 10 includes a seat cushion 12 for supporting the buttocks, thighs, etc. of a seated occupant (not shown), a seat back 14 for supporting the occupant's back, and a headrest 16.

[0025] The seat back 14 is configured to include a back frame 18, which is a skeletal member of the seat back 14, a back pad 20 supported by the back frame 18, and a back skin 22 that covers the back pad 20. The back pad 20 is disposed in front of the back frame 18 and attached to the back frame 18. The back skin 22 is formed into a bag shape by sewing together a plurality of pieces of fabric made of, for example, cloth, leather, synthetic leather, PVC, etc., and the back skin 22 houses the back pad 20 inside the bag shape.

[0026] A headrest 16 is attached to the upper end of the seat back 14, and the headrest 16 supports the head of an occupant seated on the seat cushion 12.

[0027] The seat cushion 12 includes a seat frame 24, which is a framework member of the seat cushion 12, and a cushion unit (cushion assembly) 26. The seat cushion 12 has the cushion unit 26 attached to the upper side of the seat frame 24. Fig. 2 shows a schematic cross-sectional view of the main part of the cushion unit 26 as seen from the left (side), and Fig. 3 shows a schematic cross-sectional view of the main part of the cushion unit 26 as seen from the front.

[0028] The seat frame 24 is made of a material with excellent rigidity, such as metal or hard resin. The seat frame 24 is composed of a front frame 24F on the front side, a rear frame 24R on the rear side, and a pair of side frames 24S provided on the left and right. The front frame 24F and the side frames 24S are made of plate-like members and have a generally L-shaped cross section (although they may have other shapes, such as a generally C-shaped cross section), and the rear frame 24R is shaped like a pipe. The seat frame 24 is formed into a generally rectangular frame shape when viewed from above, with each end of the front frame 24F and the rear frame 24R connected to each end of the side frame 24S.

[0029] Additionally, S springs 28 serving as shock absorbing members and elastic members are disposed on the seat frame 24. The S springs 28 are made of, for example, metal, and a plurality of the S springs 28 are disposed in the left-right direction between the pair of side frames 24S. Each S spring 28 has its front end connected to the front frame 24F and its rear end connected to the rear frame 24R, and is attached to the seat frame 24 by spanning between the front frame 24F and the rear frame 24R. In the seat cushion 12, the S springs 28 elastically support the cushion unit 26 attached to the seat frame 24 from below, thereby providing the seat cushion 12 with the required cushioning properties.

[0030] The seat frame 24 is attached to the floor of the vehicle interior via a pair of guide rails 24G arranged on the left and right, and is attached to the vehicle body so as to be slidable in the front-to-rear direction along the guide rails 24G. The lower end of the back frame 18 is tiltably connected to the rear of the seat frame 24 via a reclining mechanism (not shown). This provides the vehicle seat 10 with a sliding function in the front-to-rear direction and a reclining function for the seat back 14. Note that a known configuration can be applied to the basic configuration of such a vehicle seat 10.

[0031] 2 and 3, the cushion unit 26 includes a cushion pad 30, a seat cover 32 that covers the cushion pad 30, and a spring unit (spring assembly) 34 that covers the underside of the cushion pad 30. The seat cover 32 is formed into a bag shape by sewing together a plurality of pieces of fabric made of, for example, cloth, leather, synthetic leather, PVC, or the like, and the seat cover 32 accommodates the cushion pad 30 inside the bag shape.

[0032] The cushion unit 26 is attached to the seat frame 24 with the front and rear portions of the cushion pad 30 supported by the front frame 24F and the rear frame 24R, respectively, and the left and right side portions of the cushion pad 30 supported by the side frames 24S (see Figure 1).

[0033] The cushion pad 30 is formed with a pad main body 36 and left and right side portions (side support portions) 38 of the pad main body 36. The left and right side portions 38 bulge out above the pad main body 36 on both the left and right sides of the pad main body 36, and the side portions 38 are shaped to ensure side support for the buttocks and thighs of an occupant seated on the pad main body 36.

[0034] The cushion pad 30 can be made of a foam such as polyurethane foam (soft polyurethane foam), and any material known in the art for vehicle seats can be used for the cushion pad 30.

[0035] In recent years, there has been a desire to achieve carbon neutrality, and to achieve this, flexible polyurethane foam (biopolyurethane) using polyol (biopolyol) modified from (inedible) vegetable oil has been developed. Bioplastics such as biopolyurethane can be used for the cushion pad 30.

[0036] In the vehicle seat 10 according to this embodiment, bio-polyurethane is used in the cushion pad 30, which is a biomass pad molded (resin molded) from bio-polyurethane. The cushion pad 30 is covered over substantially the entire surface (substantially the entire pad surface) with a thin (thin) protective member (not shown) such as felt to reinforce the surface.

[0037] As shown in Figures 2 and 3, the cushion pad 30 has a protrusion 40 formed on the lower part (lower surface) of the pad main body 36, and the protrusion 40 protrudes downward within a predetermined range including the center of gravity of an occupant seated on the pad main body 36 (cushion pad 30).

[0038] As shown in Fig. 2, the protrusion 40 protrudes downward from the front and rear portions of the pad main body 36, and has a generally triangular shape when viewed in the left-right direction. As shown in Fig. 3, the protrusion 40 has side walls 42 that are inclined downward from both left-right ends (each on the side of the side portion 38 of the pad main body 36) toward the center in the left-right direction, and the protrusion 40 has a generally trapezoidal shape when viewed in the front-back direction.

[0039] The cushion pad 30 is provided with a pair of insert wires 44 as rigid members and locking means, and the insert wires 44 are embedded in the pad main body 36. The insert wires 44 are formed into a linear shape from, for example, a metal material, a resin material, or the like, and being linear allows the insert wires 44 to be elastically deformable (flexible), thereby enabling the cushion pad 30 to have the required rigidity.

[0040] The insert wire 44 is arranged such that the insert wire 44F is located in front of the pad main body 36 at a position rearward of the front frame 24F, and the insert wire 44R is located in rear of the pad main body 36 at a position frontward of the rear frame 24R. As a result, the insert wires 44F, 44R are arranged across the center of gravity of an occupant seated in the cushion pad 30 (so that the center of gravity is located at a substantially middle position). The insert wires 44 (44F, 44R) are inserted when the cushion pad 30 is molded, and are integrated with the cushion pad 30 (pad main body 36). With the insert wires 44F, 44R embedded, the cushion pad 30 has high rigidity on the front and rear sides.

[0041] The cushion pad 30 has bottomed locking holes (recesses) 46 drilled in front of the insert wire 44F and behind the insert wire 44R, and a plurality of locking holes 46 are formed in the left-right direction for each of the insert wires 44F and 44R. A portion of the insert wire 44F or 44R is exposed in the locking holes 46 so that a hook 54 described below can be locked (hooked) thereon.

[0042] The cushion unit 26 has a spring unit 34 disposed therein so as to cover the surface (lower surface) of the protruding portion 40 of the cushion pad 30 (pad main body portion 36). Fig. 4 shows a schematic perspective view of an example of the spring unit 34 as seen obliquely from above in the front-rear direction.

[0043] As shown in Figures 2 and 3, the spring unit 34 includes a spring body 50, a connecting member 52 to which the spring body 50 is connected, and a hook 54 as a locking means for locking the connecting member 52 to the insert wire 44 (44F, 44R).

[0044] The spring body 50 uses an elastic body having a higher resilience (rigidity) than the cushion pad 30 (the bio-polyurethane used in the cushion pad 30). In this embodiment, the resilience is an index indicating resilience, rigidity, or strength, and indicates the relative degree of elasticity and restorability. A low resilience (resilience) causes the cushion pad to sink more, resulting in poor restorability when the load is reduced.

[0045] In this embodiment, a cloth spring is used as the elastic body used for the spring body 50, and the spring body 50 has a higher resilience in the direction of the load that the cloth spring receives from the cushion pad 30 than in the direction of the load that the seated occupant places on the cushion pad 30. The spring body 50 is formed in a substantially rectangular shape with a size (area) that covers the surface of the protrusion 40 (the lower surface of the pad main body 36) in a tensed state between the insert wires 44F, 44R. The resilience of the spring body 50 is set so as to provide a comfortable sitting feeling (resilience) to the occupant seated on the cushion pad 30.

[0046] The connecting members 52 are provided in pairs, a connecting member 52F on the front side (the insert wire 44F side) and a connecting member 52R on the rear side (the insert wire 44R side). The connecting members 52 (52F, 52R) are strip-shaped and made of resin, and wing portions 56 are formed on both longitudinal ends of the connecting members 52. The wing portions 56 correspond to the side walls 42 of the pad main body 36, and the wing portions 56 are shaped such that the longitudinal ends of the connecting members 52 are bent upward and the tips are directed obliquely upward.

[0047] As a result, by arranging the connecting member 52F on the insert wire 44F side of the cushion pad 30, the wing portions 56 are each closely fitted to the side wall 42 of the pad main body 36 (protrusion 40), and the spaces between the wing portions 56 are closely fitted to the surface of the protrusion 40. Furthermore, by arranging the connecting member 52R on the insert wire 44R side of the cushion pad 30, the wing portions 56 are each closely fitted to the side wall 42 of the pad main body 36 (protrusion 40), and the spaces between the wing portions 56 are closely fitted to the surface (lower surface) of the protrusion 40.

[0048] The front side of the spring body 50 is connected to one side along the width direction of the connecting member 52F, and the rear side of the spring body 50 is connected to one side along the width direction of the connecting member 52R. The spring body 50 is connected to each of the connecting members 52F, 52R from the wing portion 56 on one side along the longitudinal direction to the wing portion 56 on the other side, and the spring body 50 is arranged over substantially the entire area of ​​the connecting members 52F, 52R in the longitudinal direction.

[0049] Furthermore, a plurality of hooks 54 are attached to each of the connecting members 52F, 52R on the other side along the width direction (the side opposite to the spring body 50). The hooks 54 are attached to positions corresponding to the locking holes 46 when the connecting members 52F, 52R are arranged in predetermined positions on the underside of the cushion pad 30 (pad main body portion 36).

[0050] As a result, the spring unit 34 has each hook 54 engaged with each of the insert wires 44F, 44R within the engaging holes 46, so that the connecting members 52F, 52R are engaged with the cushion pad 30 (pad main body 36), and the spring body 50 stretched in a taut state between the connecting members 52F, 52R comes into close contact with the underside of the pad main body 36 (surface of the protrusion 40) and covers the surface of the protrusion 40.

[0051] Next, the operation of this embodiment will be described. In the vehicle seat 10, the thighs and buttocks of a seated occupant are supported by the seat cushion 12, the occupant's back is supported by the seat back 14, and the occupant's head is supported by the headrest 16.

[0052] In the seat cushion 12, when an occupant sits down, the cushion pad 30 elastically deforms and bends downward, and the bent cushion pad 30 presses the S-springs 28 of the seat frame 24, causing the S-springs 28 to bear the load of the occupant. In addition, in the seat cushion 12, when the occupant stands up or sways, changing (decreasing) the load received by the upper surface of the cushion pad 30, the surface of the cushion pad 30 elastically recovers in accordance with the resilience modulus.

[0053] However, bio-polyurethanes using bio-polyols (polyols obtained by modifying vegetable oils) have weaker resilience (lower resilience modulus) than polyurethanes using petroleum-derived polyols (hereinafter referred to as soft polyurethanes). For this reason, seat cushions using bio-polyurethanes in the cushion pads tend to make seated occupants feel unsteady compared to seat cushions using soft polyurethanes in the cushion pads.

[0054] Here, in the cushion unit 26 of the vehicle seat 10, a spring unit 34 is disposed integrally with a cushion pad (biomass pad) 30 using bio-polyurethane. In the spring unit 34, a spring body 50 having a higher resilience modulus than the cushion pad 30 is in close contact (adheres closely) with the lower surface of the cushion pad 30 (pad main body portion 36), covering the lower surface of the cushion pad 30.

[0055] Therefore, in the seat cushion 12, when the cushion pad 30 receives a load due to an occupant sitting on it and elastically deforms downward, the cushion pad 30 elastically stretches the spring body 50 that is in close contact with the lower surface. As a result, in the cushion unit 26, the cushion pad 30 receives the resilience of the spring body 50, and the apparent (sensible) rigidity becomes high, and the occupant does not feel that the resilience of the cushion pad 30 is low.

[0056] Furthermore, if the spring body 50 is not in contact with the underside of the cushion pad 30, the occupant will feel a change in resilience, such as a feeling of hitting the bottom, when the spring body 50 comes into contact with the underside of the cushion pad 30. However, in the cushion unit 26, the spring body 50 is in close contact with the underside of the cushion pad 30, so the occupant will not feel a change in resilience.

[0057] Therefore, in the seat cushion 12, by bringing the spring body 50, which has a higher resilience modulus than the cushion pad 30, into close contact with the underside of the cushion pad 30, the rigidity (resilience) of the cushion pad 30 can be improved, and a comfortable sitting experience (seating feeling) can be provided to the occupant.

[0058] Furthermore, the cushion pad 30 has a protrusion 40 on the lower surface of the pad main body 36, and the protrusion 40 protrudes downward from the peripheral edge portion toward the center of the pad main body 36. Furthermore, the cushion pad 30 has an insert wire 44F embedded in the front portion of the pad main body 36, and an insert wire 44R embedded in the rear portion of the pad main body 36.

[0059] In the spring unit 34, the connecting members 52F, 52R are locked to the insert wires 44F, 44R, and the spring body 50 tightly covers the surface of the protruding portion 40 of the cushion pad 30 between the connecting members 52F, 52R. Therefore, the spring body 50 can be prevented from shifting when covering the protruding portion 40 of the cushion pad 30, and can reliably receive the load of the occupant from the cushion pad 30 and elastically support the seated occupant.

[0060] As a result, in the seat cushion 12, the occupant's body can be prevented from swaying in the front-to-rear direction of the seat as well as in the left-to-right direction of the seat by the spring body 50. Moreover, since the insert wires 44R, 44F embedded in the front and rear parts of the cushion pad 30 (pad main body 36) are used to lock the spring body 50 to the cushion pad 30, the insert wires 44F, 44R can increase the rigidity of the front and rear parts of the cushion pad 30, and the occupant's body can be effectively prevented from swaying in the front-to-rear direction of the seat.

[0061] The spring body 50 is attached to each of the insert wires 44F, 44R via connecting members 52F, 52R, and the connecting members 52F, 52R are bent so that wing portions 56 at both ends in the left-right direction of the seat are aligned with the side walls 42 of the protrusion 40. This allows the spring body 50 to be in close contact with the side walls 42 on both sides in the left-right direction of the seat, thereby generating high resilience even in response to changes in load in the left-right direction, and effectively preventing the occupant's body from swaying left-right in the seat.

[0062] Furthermore, in the vehicle seat 10, the cushion pad 30 is provided with a spring body 50 in addition to the S-spring 28 of the seat frame 24. This allows the rigidity (rebound resilience) of each cushion pad 30 to be adjusted for each vehicle seat 10, and the vehicle seat 10 can be adjusted to the rigidity preferred by the occupant using (sitting on) it.

[0063] Therefore, in the seat cushion 12 and the vehicle seat 10 provided with the seat cushion 12, the rebound elasticity of the cushion pad felt by the seated occupant can be increased, preventing the occupant's body from wobbling and ensuring good sitting comfort.

[0064] In the embodiment described above, bio-polyurethane is used for the cushion pad 30. However, the cushion pad may be made of other plant-derived resin materials (biomass plastics), or various known petroleum-derived resin materials such as soft polyurethane. This allows the rigidity of the cushion pad to be higher than the rigidity of the material. Furthermore, by providing a spring body in addition to the elastic members such as S-springs provided on the seat frame, the rigidity of each seat cushion can be adjusted, allowing the rigidity to be adjusted to the preference of the occupant using the seat cushion.

[0065] In this embodiment, a cloth spring is used for the spring body 50. However, the spring body may be made of a rubber material such as synthetic rubber or natural rubber, or may be an S-spring or the like.

[0066] In this embodiment, the insert wires 44 (44F, 44R) are embedded (inserted) in the front and rear parts of the cushion pad 30 to tension the spring body 50 so that it can expand and contract in the front-rear direction. However, the spring body may be tensioned so that it can expand and contract in the left-right direction.

[0067] Furthermore, in this embodiment, the spring body 50 is locked to the insert wire 44 embedded in the cushion pad 30. However, the configuration of the locking means for locking the spring body to the cushion pad is not limited to this, and any configuration can be applied to lock the spring body to the cushion pad as long as the spring body is in a tensioned state on the lower surface of the cushion pad and is elastically expandable and contractable in response to deformation of the cushion pad.

[0068] For example, hooks may be connected as locking means to both sides of the spring body in the front-rear direction of the seat (or both sides in the left-right direction of the seat) (the hooks may be connected without using a connecting member), and the hooks may be hooked into bottomed locking holes drilled in a cushion pad in which no insert wire is embedded. In this case, if the surface of the cushion pad is covered with a protective member such as felt, chipping of the cushion pad will not occur. Furthermore, the protective member may be a nonwoven fabric or the like impregnated with the material of the cushion pad (biopolyurethane or the like) when the cushion pad is molded. [Explanation of symbols]

[0069] 10 Vehicle seats 12 seat cushions 24 seat frame 26 Cushion unit 28 S spring 30 cushion pads 34 Spring unit 36 Pad body 40 Protrusion 44 (44F, 44R) Insert wire (locking means) 50 spring body 52 (52F, 52R) connecting member 54 Hook (locking means)

Claims

1. a cushion pad for supporting the buttocks and thighs of an occupant; a spring body that is engaged with a lower surface of a peripheral edge of the cushion pad on both sides in the front-rear direction of the seat or both sides in the left-right direction of the seat, and is disposed in close contact with the lower surface of the cushion pad, the spring body having a higher rebound resilience than the cushion pad, and that suppresses deformation of the cushion pad when the cushion pad is deformed downward; a connecting member disposed at each of the front and rear ends of the spring body, the connecting member having wing portions that are directed obliquely upward on both sides in the left-right direction of the seat, the connecting member connecting the spring body to a center portion between the wing portions; a locking means for locking each of the connecting members to the cushion pad, and locking the spring body together with the connecting members to the cushion pad; A seat cushion for a vehicle.

2. 2. The vehicle seat cushion according to claim 1, wherein the cushion pad protrudes downward from the peripheral edge of the lower surface toward the central portion of the lower surface.

3. 3. The vehicle seat cushion according to claim 1, wherein both ends of the spring body in the front-rear direction of the seat are engaged with the cushion pad.

4. The seat cushion according to any one of claims 1 to 3; a backrest for supporting the back of an occupant; a seat frame for supporting the cushion pad on which the spring body is disposed in the seat cushion; an elastic member provided on the seat frame and capable of elastically supporting the cushion pad; A vehicle seat comprising:

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