Vehicle seats

Abstract

To improve comfort for occupants.SOLUTION: A vehicle seat 10 includes: a cushion frame 22 forming a framework of a seat cushion 20; three S springs 30 spanning a cushion frame 22 in a seat front-rear direction D and configured to receive a load acting on a seat surface of the seat cushion 20 through a cushion pad 21, the three S springs 30 each having bending parts bending in a seat width direction E; connection members 40 which connect the three S springs 30 so as to cross the cushion frame 22 in the seat width direction E and provided independently of each other, spaced apart from each other in the seat front-rear direction D. The first connection member 42 is provided at straight parts 32A, 34A, 36A of the S springs 30 extending from a front frame 24 of the cushion frame 22 in the seat front-rear direction D.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a vehicle seat.

Background Art

[0002] It is known that an elastic member for supporting a cushion pad is provided in a vehicle seat (see, for example, Patent Document 1).

[0003] Patent Document 1 discloses a cushion body for a vehicle seat, which includes a spring member having a plurality of bending portions, a bridging member disposed so as to bridge between the spring members, and a connecting member for connecting the bridging member and the spring member. The bridging member is disposed at a position different from the bending portions of the spring member and bridges between the spring members, and the connecting member is formed so as not to enclose the bending portions of the spring member. Thereby, while ensuring surface rigidity and maintaining the hardness of the seat, the load is dispersed to a plurality of spring members to impart appropriate sinking, thereby improving the ride comfort that is too hard.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since the technique described in Patent Document 1 only has a configuration in which the bridging member and the connecting member connect the spring members at the portions protruding to the left and right of the spring member, the spring member may rotate about the front-rear direction of the seat as a rotation axis, and there is room for improvement in terms of improving the ride comfort of the occupant.

[0006] In consideration of the above facts, an object of the present invention is to improve the ride comfort of an occupant. [Means for solving the problem]

[0007] First aspect of the present invention The vehicle seat relating to this includes a cushion frame that constitutes the framework of the seat cushion, and an elastic member that spans the cushion frame in the front-rear direction of the seat and receives the load acting on the seat surface of the seat cushion via a cushion pad, which is bent in the width direction of the seat. multiple The curved part each It has three elastic members, The aforementioned 3 bottles bullet A connecting member that connects the material members so as to span the width direction of the sheet, and is provided independently of each other with a gap between them in the front-rear direction of the sheet. multiple A connecting member is provided, The three elastic members are, The cushion frame extends from the front frame in the seat-front-rear direction. Having a straight section, the length of the straight section in the sheet front-to-back direction is formed to be longer than the length of each of the plurality of bent sections in the sheet front-to-back direction, each of the plurality of bent sections of the two elastic members located at both ends of the sheet width direction of the three elastic members includes at least one outward projection that protrudes outward in the sheet width direction, the distance between the straight sections of the two elastic members in the sheet width direction is shorter than the length in the sheet width direction of the widened section that includes the at least one outward projection at both ends of each of the two elastic members, and at least one of the plurality of connecting members The connecting member is ,before It is located in the straight section.

[0008] First aspect of the present invention According to the findings, at least one connecting member is provided on the straight portion of the elastic member extending from the front frame of the cushion frame in the seat-forward direction. Compared to cases where the connecting member is not provided on the straight portion, the independent movement of the elastic member is suppressed. As a result, the rotation of the elastic member around the seat-forward direction as the axis of rotation (rotation in the roll direction) is further suppressed. Consequently, the seating comfort of the occupant can be improved.

[0009] Second aspect of the present invention In the vehicle seat relating to this, in the vehicle seat described in claim 1, The aforementioned at least one The The connecting member is ,before It is located in the widened section.

[0010] Second aspect of the present inventionAccording to the findings, by providing the connecting member in the widened portion of the elastic member, the rotation of the elastic member around the front-to-back direction of the seat (rotation in the roll direction) is suppressed compared to when the connecting member is provided in the narrowed portion of the elastic member. As a result, the feeling of being held by the occupant seated in the seat cushion can be further improved.

[0011] Third aspect of the present invention In the vehicle seat relating to this, in the vehicle seat described in claim 1 or claim 2, The aforementioned at least one The The connecting member is positioned to correspond to the seated occupant's buttocks, avoiding the area below the seat's hip point.

[0012] Third aspect of the present invention According to The aforementioned at least one The The connecting member is positioned to avoid the area below the seat where the hip point is located, thereby preventing stress concentration on the seated occupant's ischial tuberosities. This improves the occupant's seating comfort.

[0013] Fourth aspect of the present invention In the vehicle seat relating to this, in the vehicle seat described in any one of claims 1 to 3, The two aforementioned The elastic members are formed in a symmetrical shape relative to each other.

[0014] Fourth aspect of the present invention According to The two aforementioned The elastic members are formed in a symmetrical shape, so that the amount of deflection of the elastic members is the same whether a load is applied to the right side of the seat cushion (for example, during a left curve) or to the left side (for example, during a right curve). Therefore, the amount of deflection of the seat cushion can be made uniform, improving the comfort of the occupants.

[0015] Fifth aspect of the present invention In the vehicle seat relating to this, in the vehicle seat described in any one of claims 1 to 4, The aforementioned multiple The connecting member has a wide section that extends in the front-to-back direction of the sheet.

[0016] Fifth aspect of the present invention According to The aforementioned multiple The connecting member has a wide portion that is wide in the front-back direction of the seat, thereby increasing the area for supporting the buttocks. Therefore, it is possible to suppress the feeling of the buttocks sinking too much, that is, the feeling of the buttocks dropping, in which the cushion pad falls from the gap between the elastic members. In the vehicle seat according to the sixth aspect of the present invention, the length of the straight section in the front-rear direction of the seat is at least twice as long as the length of each of the multiple bent sections in the front-rear direction of the seat. In a vehicle seat according to a seventh aspect of the present invention, the at least one outward projection includes two outward projections in the front-rear direction of the seat, and a pair of widening portions are formed in the front-rear direction of the seat by the two outward projections of each of the two elastic members. In the eighth aspect of the present invention, at least two other connecting members of the plurality of connecting members are provided on a pair of widened portions. In the vehicle seat according to the ninth aspect of the present invention, a reinforcing member is provided in the rearward-facing widened portion of the pair of widened portions of the seat.

Advantages of the Invention

[0017] According to the vehicle seat according to the present invention, the sitting comfort of the occupant can be improved.

Brief Description of the Drawings

[0018] [Figure 1] The perspective view of the vehicle seat according to the present embodiment as seen from the front left obliquely of the seat. [Figure 2] The perspective view of the seat cushion according to the present embodiment as seen from the front left obliquely of the seat. [Figure 3] The exploded perspective view showing the seat frame according to the present embodiment. [Figure 4] The plan view showing the elastic member and the connecting member according to the present embodiment. [Figure 5] The cross-sectional view showing the state where an occupant is seated on the vehicle seat according to the present embodiment. [Figure 6] The plan view showing the elastic member and the connecting member according to the comparative example, FIG. 6(A) shows Comparative Example 1, FIG. 6(B) shows Comparative Example 2, and FIG. 6(C) shows Comparative Example 3.

Modes for Carrying Out the Invention

[0019] The vehicle seat according to this embodiment will be described below with reference to the drawings. Arrows FR shown as appropriate in each figure indicate the front of the seat in the longitudinal direction D, arrow UP indicates the upper part of the seat in the vertical direction E, and arrow LH indicates the left side of the seat in the width direction W.

[0020] This embodiment describes an example of how the vehicle seat described herein is applied to a vehicle seat installed in an automobile.

[0021] [Vehicle seat configuration] As shown in Figure 1, the vehicle seat 10 includes a seat cushion 20 on which the occupant sits, a seat back 12 that supports the occupant's upper body, and a headrest 14 provided on the upper side of the seat back 12 that supports the occupant's head.

[0022] As shown in Figure 2, the seat cushion 20 consists of a cushion frame 22 with a cushion pad 21 placed over it.

[0023] (Cushion frame 22) The cushion frame 22 comprises a front frame 24, a rear frame 26, and side frames 28, and constitutes the framework of the seat cushion 20.

[0024] The side frames 28 are arranged in pairs on the left and right sides with a gap between them in the seat width direction E. The side frames 28 extend in the seat front-rear direction D and are formed in a plate shape with the seat width direction as the plate thickness direction.

[0025] As shown in Figure 3, the front frame 24 extends in the sheet width direction E and is formed in a plate shape with the sheet thickness direction roughly in the vertical direction of the sheet. The front frame 24 near the center in the sheet width direction E is formed in a roughly L-shape in cross-section by a first portion 24A that extends in the sheet front-rear direction D and a second portion 24B that extends downward from the rear side of the first portion 24A. The front frame 24 connects the front sides of the left and right side frames 28. The second portion 24B of the front frame 24 has a first through hole 24BA, a second through hole 24BB, and a third through hole 24BC that penetrate in the sheet thickness direction.

[0026] The rear frame 26 is formed in a cylindrical shape that extends in the seat width direction E. The rear frame 26 connects the rear sides of the pair of left and right side frames 28.

[0027] (Cushion pad 21) As shown in Figure 2, the cushion pad 21 is formed from a foam material such as a urethane pad. The cushion pad 21 is supported by an S-spring 30 and a connecting member 40, which will be described later.

[0028] As shown in Figure 1, a pair of left and right slide rails 16 are provided on the lower sides of both ends of the cushion frame 22 in the seat width direction E, extending along the seat longitudinal direction D. The slide rails 16 are fixed to the vehicle floor 2. The vehicle seat 10 is slidable along the seat longitudinal direction D via the slide rails 16.

[0029] (S spring 30) As shown in Figures 2 and 3, an S-spring 30, acting as an elastic member, is attached to the cushion frame 22. The S-spring 30 is stretched across the seat in the front-rear direction D. The S-spring 30 receives the load acting on the seat surface of the seat cushion 20 via the cushion pad 21.

[0030] Figure 4 shows that the S-spring 30 is formed by bending a rod-shaped steel material. The S-spring 30 consists of a first S-spring 32, a second S-spring 34, and a third S-spring 36, which are arranged side by side in the seat width direction E. The first S-spring 32, the second S-spring 34, and the third S-spring 36 are configured in the following order from the front side of the seat: tip S1, first intermediate part S2, second intermediate part S3, third intermediate part S4, fourth intermediate part S5, fifth intermediate part S6, and rear end part S7.

[0031] <1st S spring 32> As shown in Figures 2 and 4, the first S spring 32 is positioned to the left of the cushion frame 22 in the seat width direction E. The first S spring 32 has a straight portion 32A formed at its tip S1. The straight portion 32A extends straight from the front frame 24 to the rear of the seat. The tip of the straight portion 32A is hook-shaped and is hooked into the first through hole 24BA via a resin protective cover 50. The front end of the first S spring 32 is connected to the upper side of the seat on the front frame 24.

[0032] The first S spring 32 has a right-side extension 32B formed in a roughly U-shape on the right side of the seat at the first intermediate section S2, the third intermediate section S4, and the fifth intermediate section S6.

[0033] The first S spring 32 has a left protrusion 32C formed in a roughly U-shape on the left side of the seat at the second intermediate section S3 and the fourth intermediate section S5. The right protrusion 32B and the left protrusion 32C form a bent section that is bent in the direction of the seat width.

[0034] The first spring 32 has a hook portion 32D formed at its rear end S7. The hook portion 32D is formed in a hook shape and is hooked onto the rear frame 26 via a resin protective cover 48B.

[0035] <2nd S spring 34> The second spring 34 is positioned between the first spring 32 and the third spring 36 in the seat width direction E. The second spring 34 is formed in a shape symmetrical to the first spring 32. The second spring 34 has a straight portion 34A formed at its tip S1. The tip of the straight portion 34A is hook-shaped and is hooked into the second through-hole 24BB via a resin protective cover 50. The front end of the second spring 34 on the seat side is connected to the upper side of the seat on the front frame 24.

[0036] The second S spring 34 has a left protruding portion 34B formed in a roughly U-shape on the left side of the seat at the first intermediate portion S2, the third intermediate portion S4, and the fifth intermediate portion S6.

[0037] The second S spring 34 has a right protrusion 34C formed in a roughly U-shape on the right side of the seat at both the second intermediate section S3 and the fourth intermediate section S5. The left protrusion 34B and the right protrusion 34C form a bent section that is bent in the direction of the seat width.

[0038] The second spring 34 has a hook portion 34D formed at its rear end S7. The hook portion 34D is hook-shaped and is attached to the rear frame 26 via a resin protective cover 48B.

[0039] <3rd S spring 36> The third S spring 36 is positioned to the right of the cushion frame 22 in the seat width direction E. The third S spring 36 is formed in a shape symmetrical to the first S spring 32. The third S spring 36 is formed in the same shape as the second S spring 34. The third S spring 36 has a straight portion 36A formed at its tip S1. The tip of the straight portion 36A is hook-shaped and is hooked into the third through hole 24BC via a resin protective cover 50. The front end of the third S spring 36 is connected to the upper side of the seat of the front frame 24.

[0040] The third spring 36 has a left protruding portion 36B formed in a roughly U-shape on the left side of the seat, at the first intermediate portion S2, the third intermediate portion S4, and the fifth intermediate portion S6.

[0041] The second S spring 36 has a right protrusion 36C formed in a roughly U-shape on the right side of the seat at both the second intermediate section S3 and the fourth intermediate section S5. The left protrusion 36B and the right protrusion 36C form a bent section that is bent in the direction of the seat width.

[0042] The third spring 36 has a hook portion 36D formed at its rear end S7. The hook portion 36D is hook-shaped and is attached to the rear frame 26 via a resin protective cover 48B.

[0043] In the S-spring 30 formed in this manner, the second intermediate section S3 and the fourth intermediate section S5 constitute widened sections where the width W2 in the seat width direction E is wider. The first intermediate section S2, the third intermediate section S4, and the fifth intermediate section S6 constitute narrowed sections where the width W1 in the seat width direction E is narrower than the width W2.

[0044] (Connecting member 40) The connecting member 40 is made of resin and connects the first S spring 32, the second S spring 34, and the third S spring 36 so as to span the width direction E of the seat. The connecting member 40 is composed of a first connecting member 42, a second connecting member 44, a third connecting member 46, and a fourth connecting member 48. The first connecting member 42, the second connecting member 44, the third connecting member 46, and the fourth connecting member 48 are provided independently of each other with a gap between them in the front-rear direction D of the seat.

[0045] <First connecting member 42> The first connecting member 42 is formed in the shape of a rectangular plate with the sheet's vertical direction as the sheet's thickness direction and extending in the sheet's width direction E. The first connecting member 42 is positioned on the rear side of the sheet at the tip portion S1. The first connecting member 42 connects the straight portion 32A of the first S spring 32, the straight portion 34A of the second S spring 34, and the straight portion 36A of the third S spring 36, straddling each other.

[0046] The first connecting member 42 is provided with a wide circular section 42A in the seat's front-rear direction D. In the seat's width direction E, one wide section 42A is positioned between the first S spring 32 and the second S spring 34, and another is positioned between the second S spring 34 and the third S spring 36.

[0047] <Second connecting member 44> The second connecting member 44 is formed in the shape of a rectangular plate with the sheet thickness direction in the vertical direction and extending in the sheet width direction E. The second connecting member 44 is located in the second intermediate section S3. The second connecting member 44 connects the left protruding portion 32C of the first S spring 32, the right protruding portion 34C of the second S spring 34, and the right protruding portion 36C of the third S spring 36. In other words, the second connecting member 44 is provided in the widened portion of the S spring 30.

[0048] The second connecting member 44 is provided with a wide circular section 44A in the seat's front-rear direction D. Three wide sections 44A are arranged between the first S spring 32 and the second S spring 34 in the seat's width direction E, and two are arranged between the second S spring 34 and the third S spring 36.

[0049] <Third connecting member 46> The third connecting member 46 is formed in the shape of a rectangular plate, with the sheet's vertical direction as the sheet's thickness direction and extending in the sheet's width direction E. The third connecting member 46 is positioned in the fourth intermediate section S5. The third connecting member 46 connects the left protruding portion 32C of the first S spring 32, the right protruding portion 34C of the second S spring 34, and the right protruding portion 36C of the third S spring 36, straddling each other. In other words, the third connecting member 46 is provided in the widened portion of the S spring 30.

[0050] The third connecting member 46 is provided with a wide circular section 46A in the seat's front-rear direction D. Three wide sections 46A are arranged between the first S spring 32 and the second S spring 34 in the seat's width direction E, and two are arranged between the second S spring 34 and the third S spring 36.

[0051] <Fourth connecting member 48> The fourth connecting member 48 has a substantially L-shaped cross-section and is formed as a plate extending in the sheet width direction E. The fourth connecting member 48 is positioned at the rear end S7. The fourth connecting member 48 connects the base portion of the hook portion 32D of the first S spring 32, the base portion of the hook portion 34D of the second S spring 34, and the base portion of the hook portion 36D of the third S spring 36, straddling each other.

[0052] The fourth connecting member 48 has a roughly semicircular wide portion 48A that protrudes toward the front side of the seat. In the seat width direction E, one wide portion 48A is positioned between the first S spring 32 and the second S spring 34, and another is positioned between the second S spring 34 and the third S spring 36.

[0053] The fourth connecting member 48 is provided with a protective cover 48B that covers the hook portion 32D of the first S spring 32, the hook portion 34D of the second S spring 34, and the hook portion 36D of the third S spring 36.

[0054] As shown in Figure 5, the first connecting member 42, the second connecting member 44, the third connecting member 46, and the fourth connecting member 48 are positioned to correspond to the buttocks of a seated occupant M, and are positioned to avoid the area below the seat at the hip point HP.

[0055] The connecting member 40 is provided in the widening section, but not in the narrowing section.

[0056] (Reinforcement member 60) A reinforcing member 60 is attached to the S-spring 30. The reinforcing member 60 is formed by bending a rod-shaped steel material. The reinforcing member 60 extends in the seat width direction E. The reinforcing member 60 is provided at a position corresponding to the buttocks of the occupant M seated in the vehicle seat 10. The reinforcing member 60 is provided in the fourth intermediate section S5.

[0057] The reinforcing member 60 comprises a first reinforcing member 62 and a second reinforcing member 64.

[0058] <First reinforcing member 62> The first reinforcing member 62 is connected to the first S-spring 32, the second S-spring 34, and the third S-spring 36 by fastening members 52. The first reinforcing member 62 connects the front side of the seat of the left protrusion 32C of the first S-spring 32, the front side of the seat of the right protrusion 34C of the second S-spring 34, and the front side of the seat of the right protrusion 36C of the third S-spring 36.

[0059] The first reinforcing member 62 is provided with curved protrusions 62A that project forward towards the front of the seat, located between the first S spring 32 and the second S spring 34, and between the second S spring 34 and the third S spring 36.

[0060] <Second reinforcing member 64> The second reinforcing member 64 is connected to the first S-spring 32, the second S-spring 34, and the third S-spring 36 by fastening members 52. The second reinforcing member 64 connects the rear side of the left protrusion 32C of the first S-spring 32 to the rear side of the right protrusion 34C of the second S-spring 34 to the rear side of the right protrusion 36C of the third S-spring 36 to the rear side of the seat.

[0061] The second reinforcing member 64 has curved protrusions 64A that project towards the rear of the seat between the first S spring 32 and the second S spring 34, and between the second S spring 34 and the third S spring 36.

[0062] [Method for molding the connecting member 40] The connecting member 40 can be integrally formed with the first S spring 32, the second S spring 34, and the third S spring 36 by insert molding, where the first S spring 32, the second S spring 34, and the third S spring 36 are placed as insert parts in a mold. In this case, the protective cover 50 may also be integrally formed with the first S spring 32, the second S spring 34, and the third S spring 36 by insert molding.

[0063] [Seat cushion 20 operation] As shown in Figure 5, when an occupant M sits on the vehicle seat 10, the load directed downwards on the seat is distributed and acted upon the S-spring 30, the connecting member 40, and the reinforcing member 60 via the cushion pad 21. When the load directed downwards on the seat acts upon the S-spring 30, the connecting member 40, and the reinforcing member 60, the S-spring 30 deforms so as to bend downwards on the seat.

[0064] [Sensory evaluation] Next, to confirm the effectiveness of the vehicle seat of this embodiment, a sensory evaluation of the vehicle seat of this embodiment was conducted. As comparative examples, Comparative Example 1 shown in Figure 6(A), Comparative Example 2 shown in Figure 6(B), and Comparative Example 3 shown in Figure 6(C) were prepared.

[0065] As shown in Figure 6(A), the vehicle seat of Comparative Example 1 is provided with four S-springs 30. The connecting member 140 of the vehicle seat of Comparative Example 1 is composed of a first connecting member 142 provided in the first intermediate section S2, a second connecting member 144 provided in the second intermediate section S3, a third connecting member 146 provided in the fourth intermediate section S5, and a fourth connecting member 148 provided in the rear end section S7.

[0066] As shown in Figure 6(B), the vehicle seat of Comparative Example 2 is provided with three S-springs 30. The connecting member 40 is composed of a fourth connecting member 48. The S-springs 30 are provided with reinforcing members 60.

[0067] As shown in Figure 6(C), the vehicle seat of Comparative Example 3 is provided with three S-springs 30. The connecting member 40 is composed of a second connecting member 44, a third connecting member 46, and a fourth connecting member 48. The S-springs 30 are provided with reinforcing members 60.

[0068] The vehicle seat 10 of this embodiment, the vehicle seat of Comparative Example 1, the vehicle seat of Comparative Example 2, and the vehicle seat of Comparative Example 3 were evaluated for "stroke feel," "hold feel," and "buttock sinking feel." "Stroke feel" evaluates the amount of stroke when sitting on the vehicle seat. "Hold feel" evaluates the sense of stability when sitting on the vehicle seat (whether there is any feeling of instability such as wobbling). "Buttock sinking feel" evaluates the feeling of the buttocks sinking too much when sitting on the vehicle seat. Five evaluators were used.

[0069] [Table 1]

[0070] As shown in Table 1, the vehicle seat of Comparative Example 1 had sufficient "holding" and "sinking" sensations, but the "stroke" sensation was insufficient. The vehicle seat of Comparative Example 2 had sufficient "stroke" sensations, but the "holding" sensation was insufficient and the "sinking" sensation was inadequate. The vehicle seat of Comparative Example 3 had sufficient "stroke" sensations and "sinking" sensations, but the "holding" sensation was insufficient. The vehicle seat 10 of this embodiment had sufficient "stroke" sensations, "holding" sensations, and "sinking" sensations.

[0071] [Operation of this embodiment] Next, the operation and effects of the vehicle seat 10 of this embodiment will be described.

[0072] The vehicle seat 10 of this embodiment includes a cushion frame 22 that constitutes the framework of the seat cushion 20, three S-springs 30 that are stretched across the cushion frame 22 in the seat-front-rear direction D and receive the load acting on the seat surface of the seat cushion 20 via a cushion pad 21, and each S-spring has a bent portion that is bent in the seat-width direction E, and three resin connecting members 40 that connect the three S-springs 30 so as to straddle the seat-width direction E, and the connecting members 40 are spaced apart in the seat-front-rear direction D and provided independently of each other. The first connecting member 42 is provided on the straight portions 32A, 34A, and 36A of the S-springs 30 that extend from the front frame 24 in the seat-front-rear direction D (see Figure 4).

[0073] The cushion frame 22 is spanned in the front-to-back direction D of the seat, and three S-springs 30 receive the load acting on the seat surface of the seat cushion 20 via the cushion pad 21. By providing S-springs 30 that have a bent portion bent in the seat width direction E, the S-springs 30 become more flexible compared to the case where four S-springs are provided. Therefore, even when the cushion pad 21 is made thinner and the seat cushion 20 is made thinner, the amount of deflection of the seat cushion 20 can be maintained. As a result, even when the seat cushion 20 is made thinner, a decrease in the seating comfort of the occupant M can be suppressed.

[0074] Furthermore, by providing a resin connecting member 40 that connects the three S-springs 30 across the seat width direction E, the independent movement of the S-springs 30 is suppressed. As a result, the rotation of the S-springs 30 around the seat longitudinal direction D as the axis of rotation (rotation in the roll direction) is suppressed. Consequently, the feeling of being held by the occupant M seated on the seat cushion 20 can be improved.

[0075] Furthermore, by providing the connecting members 40 at intervals in the front-rear direction D of the seat, it is possible to achieve a uniform amount of deflection for the S-spring 30 while realizing the integrated operation of the S-spring 30.

[0076] Furthermore, since the connecting members 40 are provided independently of each other, the seat cushion 20 becomes more flexible compared to when the connecting members 40 are connected to each other. As a result, the seat cushion 20 can be made thinner while maintaining the comfort of the occupant M.

[0077] Furthermore, since the first connecting member 42 is provided on the straight sections 32A, 34A, and 36A of the S-spring 30 that extends from the front frame 24 of the cushion frame 22 in the seat longitudinal direction D, independent movement of the S-spring 30 is suppressed compared to the case where the first connecting member 42 is not provided on the straight sections 32A, 34A, and 36A. As a result, rotation of the S-spring 30 around the seat longitudinal direction D as the axis of rotation (rotation in the roll direction) is further suppressed. Consequently, the seating comfort of the occupant M can be improved.

[0078] In the vehicle seat 10 of this embodiment, the second connecting member 44 and the third connecting member 46 are provided on the widened portion of the S spring 30 (see Figure 4).

[0079] The second connecting member 44 and the third connecting member 46 are provided on the widened portion of the S-spring 30, which suppresses the rotation of the S-spring 30 around the seat's longitudinal direction D as the axis of rotation (rotation in the roll direction) compared to when they are provided on the narrowed portion of the S-spring 30. As a result, the seating comfort of the occupant M can be further improved.

[0080] In the vehicle seat 10 of this embodiment, the connecting member 40 is positioned at a location corresponding to the buttocks of the seated occupant M, and avoiding the area below the hip point HP of the seat (see Figure 5).

[0081] The connecting member 40 is positioned to correspond to the buttocks of the seated occupant M, so that the buttocks are supported by the S-spring 30 and the connecting member 40. As a result, the area supporting the buttocks increases compared to when the connecting member 40 is not provided in the position corresponding to the buttocks. Consequently, the feeling of the buttocks sinking too much due to the cushion pad 21 falling through the gap between the S-springs 30 can be suppressed.

[0082] Furthermore, since the connecting member 40 is positioned to avoid the area below the seat at the hip point HP, stress concentration on the ischial tuberosity of the seated occupant M is avoided. As a result, the seating comfort of the occupant M can be improved.

[0083] In the vehicle seat 10 of this embodiment, the first S spring 32 and the third S spring 36, which are provided on the outside in the seat width direction E, are formed in a symmetrical shape relative to each other (see Figure 3).

[0084] The S-springs 30, located on the outer side in the seat width direction E, are formed in a symmetrical shape, so that the amount of deflection of the S-springs 30 is the same whether a load is applied to the right side of the seat cushion 20 (for example, during a left curve) or to the left side of the seat cushion 20 (for example, during a right curve). As a result, the seat cushion 20 can have a uniform amount of deflection, improving the seating comfort of the occupant M.

[0085] In the vehicle seat 10 of this embodiment, the connecting member 40 is provided with wide sections 42A, 44A, 46A, and 48A in the front-rear direction D of the seat (see Figure 3).

[0086] The connecting member 40 has wide sections 42A, 44A, 46A, and 48A in the front-rear direction D of the seat, which increases the area that supports the buttocks. As a result, it is possible to suppress the feeling of the buttocks sinking too much, which occurs when the cushion pad 21 falls in through the gap between the S springs 30.

[0087] The vehicle seat of the present invention has been described above based on the above embodiments. However, the specific configuration is not limited to these embodiments, and changes to the design are permitted as long as they do not deviate from the gist of the invention as described in each claim of the patent.

[0088] In the above embodiment, the second S spring 34 was shown to have a left protrusion 34B and a right protrusion 34C. However, the second S spring may also be formed to extend straight without any protrusions.

[0089] In the above embodiment, the second connecting member 44 and the third connecting member 46 are shown as being provided in the widening section. The second connecting member and the third connecting member may also be provided in the narrowing section.

[0090] In the above embodiment, an example was shown in which four connecting members 40 are provided. However, the number of connecting members is not limited to this embodiment.

[0091] In the above embodiment, the connecting member 40 was shown to be made of resin. However, the material of the connecting member is not limited to this embodiment and can also be rubber, metal wire, or the like.

[0092] The above embodiment shows an example of applying the vehicle seat of the present invention to a vehicle seat in an automobile. However, the vehicle seat of the present invention can be applied to seats in trains, aircraft, ships, and other vehicles. [Explanation of Symbols]

[0093] 10 Vehicle seats 20 Seat Cushions 21 Cushion pads 22 Cushion Frame 24 Front frame 30 S-spring (an example of an elastic component) 32A, 34A, 36A Straight section 40 Connecting member 42A, 44A, 46A, 48A Wide section D Seat front-to-back direction E Sheet width direction HP Hip Point

Claims

1. The cushion frame that makes up the framework of the seat cushion, The cushion frame is spanned in the front-to-back direction of the seat and, via the cushion pad, receives the load acting on the seat surface of the seat cushion, and comprises three elastic members, each having a plurality of bent portions bent in the width direction of the seat, A connecting member that connects the three elastic members so as to span the width direction of the sheet, comprising a plurality of connecting members that are spaced apart in the front-rear direction of the sheet and provided independently of each other, The three elastic members each have a straight portion extending from the front frame of the cushion frame in the front-rear direction of the seat, and the length of the straight portion in the front-rear direction of the seat is longer than the length of each of the multiple bent portions in the front-rear direction of the seat. Each of the multiple bent portions of the two elastic members located at both ends in the sheet width direction of the three elastic members includes at least one outward projection that protrudes outward in the sheet width direction. The distance between the straight portions of the two elastic members in the sheet width direction is shorter than the length in the sheet width direction of the widened portion that includes at least one outward protruding portion of each of the two elastic members at both ends. At least one of the plurality of connecting members is provided on the straight portion. Vehicle seats.

2. The at least one connecting member is provided in the widened portion A vehicle seat according to claim 1.

3. The at least one connecting member is provided at a position corresponding to the buttocks of a seated occupant, and at a position avoiding the area below the seat at the hip point. A vehicle seat according to claim 1.

4. The two elastic members are formed in a symmetrical shape relative to each other. A vehicle seat according to claim 1.

5. The plurality of connecting members are provided with a wide portion that is wide in the front-to-back direction of the sheet. A vehicle seat according to claim 1.

6. The length of the straight section in the front-to-back direction of the sheet is at least twice as long as the length of each of the plurality of bent sections in the front-to-back direction of the sheet. A vehicle seat according to claim 1.

7. The at least one outward projection includes two outward projections in the front-rear direction of the sheet, and the two outward projections of each of the two elastic members form a pair of widening portions in the front-rear direction of the sheet. A vehicle seat according to claim 1.

8. At least two other connecting members of the plurality of connecting members are provided on the pair of widening portions. A vehicle seat according to claim 7.

9. A reinforcing member is provided in the rearward widening portion of the pair of widening portions in the front-rear direction of the seat. A vehicle seat according to claim 8.

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