Vehicle seats

Abstract

To provide a vehicle seat that enables wire members to be appropriately disposed relative to a seat frame including side frames with plate thicknesses different from one another.SOLUTION: A vehicle seat S includes a seat frame F. The seat frame F includes: a pair of side frames 20 disposed on side parts of the vehicle seat S; and wire members W provided so as to project from the respective side frames 20. Each side frame has: a thick part 25; an intermediate thick part 26 thinner than the thick part 25; and a thin part 27 thinner than the intermediate thick part 26. The thick part 25 and the intermediate thick part 26 are continuous through a first boundary L1. The intermediate thick part 26 and the thin part 27 are continuous through a second boundary L2. Each wire member W continues in an extending direction of the side frame 20. A rear-end fixing part W1a and a front-end fixing part W2a of each wire member W, relative to the side frame 20, are disposed at positions avoiding the first boundary L1 or the second boundary L2.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat including a wire member protruding from a side frame. [Background technology]

[0002] 2. Description of the Related Art In vehicle seats, because the strength required for side frames of a seat back frame differs in different parts, a technique for thickening a part of the side frame is known (Patent Document 1).

[0003] More specifically, in the technology of Patent Document 1, the side frame of the seatback frame is composed of a side frame main body and a side frame that is formed thicker than the side frame main body and welded to the lower part of the side frame main body, thereby ensuring the strength of the hinge connection part where the lower part of the side frame of the seatback frame is connected to the seat cushion frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5691769 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to minimize the increase in weight of the side frame while ensuring the necessary strength, it is desirable to vary the thickness of the side frame more finely; however, when a wire member protruding from the side frame is provided, it is necessary to position the wire member appropriately.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a vehicle seat in which a wire member can be appropriately positioned in a seat frame having side frames with different plate thicknesses. [Means for solving the problem]

[0007] The above-mentioned problem is solved by a vehicle seat according to the present invention, which is a vehicle seat including a seat frame, the seat frame including a pair of side frames disposed on sides of the vehicle seat, and a wire member provided so as to protrude from the side frames, The end of the seating surface side of the seat protrudes in the seat width direction, and the protruding portion of the side frame has a thick portion of a first plate thickness, a middle portion of a second plate thickness formed continuously with the thick portion and thinner than the thick portion, and a thin portion of a third plate thickness formed continuously with the middle portion and thinner than the middle portion, the thick portion and the middle portion being continuous with each other at a first boundary portion, and the middle portion and the thin portion being continuous with each other at a second boundary portion, the wire member extends in an extension direction of the side frame, Fixed to the protruding portion of the side frame This problem is solved by arranging the fixing portion at a position that avoids the first boundary portion or the second boundary portion.

[0008] In the vehicle seat of the present invention configured as described above, it is possible to improve the fixation of the wire member to side frames having different plate thicknesses by avoiding boundary portions where strength is reduced.

[0009] In the vehicle seat described above, the wire member is fixed to the side frame at the fixed portion. The protruding portion of It is preferable that it is welded. In the above configuration, the wire member is appropriately fixed to the side frame by being welded.

[0010] In the vehicle seat described above, the wire member is fixed to the side frame at the fixed portion. The protruding portion of It is preferable that the fastening member is used for fixing the fastening member. In the above configuration, the wire member is appropriately fixed to the side frame by the fastening member.

[0011] In the above vehicle seat, the fixing portion may have a first fixing portion and a second fixing portion, and one of the first fixing portion or the second fixing portion may be positioned at the first boundary portion or the second boundary portion. In the above configuration, by arranging one of the multiple fixing parts at the boundary part, the options for the position at which the fixing part is set increase, improving designability.

[0012] In the above vehicle seat, an opening penetrating the side frame in the seat width direction is preferably formed, and the opening is preferably positioned at a position avoiding the first boundary portion or the second boundary portion. In the above-described configuration, by providing the openings while avoiding the boundary portions where the strength is reduced, it becomes possible to appropriately position the openings for side frames having different plate thicknesses.

[0013] In the above vehicle seat, the opening may have a first opening and a second opening, and one of the first opening or the second opening may be positioned across the first boundary portion or the second boundary portion. In the above configuration, by arranging one of the plurality of openings at a position straddling the boundary portion, the options for the position at which the opening is to be set are increased, improving designability.

[0014] In the vehicle seat described above, at least one of the first fixing portion and the second fixing portion may be disposed between the first opening and the second opening in the extending direction of the side frame. In the above configuration, by avoiding positions in the side frames where openings are provided and strength is reduced, it is possible to improve the fixation of the wire member to side frames having different plate thicknesses.

[0015] In the vehicle seat described above, one of the first fixing portion or the second fixing portion may be disposed at a position overlapping with the first opening or the second opening in the extending direction of the side frame. In the above configuration, by arranging one of the multiple fixing parts at a position overlapping the opening, the options for the position at which the fixing part is set are increased, improving designability.

[0016] In the above vehicle seat, the seat frame may be a seat cushion frame. In the above configuration, it is possible to improve the fixation of the wire member to the side frames having different plate thicknesses of the seat cushion frame.

[0017] The vehicle seat may further include a padding member placed on the seat frame, and a cover material covering the padding member. With the above configuration, in a vehicle seat including side frames with different plate thicknesses, it is possible to improve the fixation of the wire member to the side frames. Effect of the Invention

[0018] According to the vehicle seat of the present invention, it is possible to improve the fixation of the wire member to side frames having different plate thicknesses by avoiding boundary portions where strength is reduced. Furthermore, according to the vehicle seat of the present invention, the wire members are appropriately fixed to the side frames by being welded. Furthermore, according to the vehicle seat of the present invention, the wire member is appropriately fixed to the side frame by the fastening member. Furthermore, according to the vehicle seat of the present invention, by arranging one of the multiple fixing parts at the boundary part, the options for the position at which the fixing part is set increase, improving designability. Furthermore, according to the vehicle seat of the present invention, the openings can be provided in a manner that avoids the boundary portions where strength is reduced, making it possible to appropriately position the openings with respect to side frames having different plate thicknesses. Furthermore, according to the vehicle seat of the present invention, by arranging one of the plurality of openings at a position that straddles the boundary portion, the options for the position at which the opening is to be set increase, improving design flexibility. Furthermore, according to the vehicle seat of the present invention, it is possible to improve the fixation of the wire member to side frames having different plate thicknesses by avoiding positions where openings would reduce strength. Furthermore, according to the vehicle seat of the present invention, by arranging one of the multiple fixing parts at a position overlapping with the opening, the options for the position at which the fixing part is set increase, improving design flexibility. Furthermore, according to the vehicle seat of the present invention, it is possible to improve the fixation of the wire member to the side frames having different plate thicknesses that are provided in the seat cushion frame. Furthermore, according to the vehicle seat of the present invention, in a vehicle seat equipped with side frames having different plate thicknesses, it is possible to improve the fixation of the wire member to the side frames. [Brief description of the drawings]

[0019] [Figure 1] 1 is an external view of a vehicle seat according to an embodiment of the present invention; [Diagram 2] 2 is a perspective view of a seat frame included in the vehicle seat; FIG. [Diagram 3] FIG. 4 is a side view of the seat cushion side frame. [Figure 4] 4 is a cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] A vehicle seat according to one embodiment of the present invention (hereinafter, the present embodiment) will be described below with reference to Fig. 1 to Fig. 4. As the vehicle seat according to the present embodiment, a vehicle seat mounted in a vehicle will be described as an example.

[0021] The embodiment described below is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, and other aspects of the components described below may be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

[0022] In this specification, the terms indicating directions are defined as shown in FIG. 1. Specifically, in the following description, the "front-rear direction" means the front-rear direction as seen by a person sitting in the vehicle seat, and is the direction that coincides with the vehicle's traveling direction. The "seat width direction" means the width direction of the vehicle seat, and coincides with the left-right direction as seen by a person sitting in the vehicle seat. Additionally, the "up-down direction" means the height direction of the vehicle seat, and coincides with the up-down direction as seen by the vehicle seat from the front.

[0023] [1. Configuration of the vehicle seat S] The vehicle seat S according to this embodiment has an appearance as shown in FIG. 1. In FIG. 1, a part of the vehicle seat S is shown with a trim cover removed for convenience of illustration. The vehicle seat S has as its main components a seat back S1 which is a backrest portion supporting the back of a seated occupant, a seat cushion S2 which is a seating portion supporting the buttocks of the seated occupant, and a headrest S3 which is disposed on the upper part of the seat back S1 and supports the head of the seated occupant. As shown in FIG. 2, the vehicle seat S has a seat frame F as a skeleton, the main components of which are a seat back frame F1 and a seat cushion frame F2.

[0024] The seat back S1 is constructed by placing a seat back pad S11 on a seat back frame F1, and further covering the seat back pad S11 with a trim cover S12. The seat cushion S2 is constructed by placing a seat cushion pad S21 on a seat cushion frame F2, which serves as a framework, and further covering the seat cushion pad S21 with a trim cover S22. The head rest S3 is formed by disposing a head rest pad S31 on a core material (not shown), and covering it with a trim cover S32. The seat back pad S11 of the seat back S1 and the seat cushion pad S21 of the seat cushion S2 are urethane base materials molded by foam molding using a urethane foam material.

[0025] The seat cushion frame F2 is connected to an upper rail RU of a slide rail device R disposed below the seat cushion frame F2. With this configuration, when the upper rail RU moves along the lower rail RL fixed to the vehicle floor, the entire vehicle seat S including the seat cushion frame F2 slides.

[0026] [2. Structure of seat frame F] (Seat back frame F1) As shown in FIG. 2, the seatback frame F1 has a pair of seatback side frames 10 extending in the vertical direction and aligned at a distance from each other in the seat width direction, an upper frame 15 attached to the top of the pair of seatback side frames 10 to connect the pair of seatback side frames 10, and a lower frame 16 attached to the lower ends of the pair of seatback side frames 10 to connect the pair of seatback side frames 10.

[0027] The seatback side frame 10 integrally comprises a side plate 10a, a front flange 10b protruding inward from a front edge of the side plate 10a, and a rear flange 10c protruding inward from a rear edge of the side plate 10a. The seatback side frame 10 has a generally U-shaped cross section that opens inward, and is formed by press molding of a metal plate.

[0028] The upper frame 15 is formed into a downward U-shape when viewed from the front, and is made of a hollow metal pipe member. Both free ends (lower ends) of the upper frame 15 are joined to the upper parts of the pair of seatback side frames 10. A square cylindrical pillar guide 15a that supports a headrest pillar is attached to the front surface of the horizontal portion located above the upper frame 15.

[0029] (Seat cushion frame F2) 2, the seat cushion frame F2 has a pair of seat cushion side frames 20 extending in the front-rear direction so as to be aligned at positions spaced apart from each other in the seat width direction, a pan frame 21 connecting front ends of the pair of seat cushion side frames 20, and a rear pipe 22 connecting rear ends of the pair of seat cushion side frames 20, which are integrally joined by welding or the like to form a frame. The seat cushion side frames 20 and the pan frame 21 are formed by pressing a metal plate, and the rear pipe 22 is formed from a metal pipe.

[0030] Between the pan frame 21 and the rear pipe 22, a seat spring 23 is stretched as a pressure-receiving member that elastically deforms when it receives the load of a seated occupant via a seat cushion pad S21. The seat cushion frame F2 has a plurality of seat springs 23 (three in this embodiment) that are formed by bending a metal wire in a zigzag pattern so as to snake left and right. The front ends of the plurality of seat springs 23 are engaged with locking portions 21a provided on the pan frame 21. The rear ends of the seat springs 23 are engaged with the rear pipe 22 and are connected by a resin rear end connecting member 24 that is molded integrally with the seat springs 23 by insert molding, and the rear end connecting member 24 is formed so as to cover the rear pipe 22.

[0031] As shown in Fig. 4, which is a cross-sectional view taken along line AA in Fig. 3, the seat cushion side frame 20 has a generally U-shaped cross section that opens inward, and is formed by press molding a metal plate material into a shape in which the plate thickness changes at plate thickness boundaries (plate thickness boundary lines) arranged at multiple locations in the longitudinal direction (approximately the front-rear direction). In this embodiment, a first boundary L1 (first plate thickness boundary line) and a second boundary L2 (second plate thickness boundary line) are set in the seat cushion side frame 20.

[0032] The first boundary portion L1 and the second boundary portion L2 are set at positions that avoid the connection portions of the pan frame 21 and the rear pipe 22 to the seat cushion side frame 20, with the first boundary portion L1 being positioned toward the rear of the seat cushion side frame 20 and the second boundary portion L2 being positioned in front of the first boundary portion L1 and at a central position in the longitudinal direction of the seat cushion side frame 20.

[0033] The seat cushion side frame 20 has a thick portion 25 (first portion) which is a portion with a plate thickness t1 rearward of the first boundary portion L1, a medium-thickness portion 26 (second portion) which is a portion with a plate thickness t2 forward of the first boundary portion L1 and rearward of the second boundary portion L2, and a thin portion 27 (third portion) which is a portion with a plate thickness t3 forward of the second boundary portion L2 (t3 <t2<t1)。

[0034] The plate thickness t2 of the intermediate portion 26 between the first boundary portion L1 and the second boundary portion L2 is smaller than the plate thickness t1 of the thick portion 25 rearward of the first boundary portion L1, and further the plate thickness t3 of the thin portion 27 forward of the second boundary portion L2 is smaller than the plate thickness t2 of the intermediate portion 26. In other words, the seat cushion side frame 20 is formed so that the thickness gradually becomes thinner toward the front.

[0035] [3. Features of the seat frame F] 3, a wire member W protruding upward (i.e., toward the seating surface) from the seat cushion side frame 20 is attached to the seat cushion side frame 20. The wire member W (linear member) is a linear member bent downward in a substantially U-shape in side view, and is a reinforcing member (support member) for maintaining the shape of the raised portions (bank portions) on both sides of the seat cushion S2.

[0036] The wire member W extends in the extending direction of the seat cushion side frame 20, i.e., in the front-rear direction, between the rear end W1 and the front end W2, and is fixed to the seat cushion side frame 20 at a rear end fixing part W1a and a front end fixing part W2a. The rear end fixing part W1a and the front end fixing part W2a are provided at positions that avoid the first boundary part L1 and the second boundary part L2. In other words, in the extending direction of the seat cushion side frame 20, the rear end fixing part W1a and the front end fixing part W2a are disposed at positions different from the first boundary part L1 and the second boundary part L2.

[0037] Specifically, the rear end fixing portion W1a is disposed in front of the first boundary portion L1 and behind the second boundary portion L2 in the intermediate portion 26, that is, at a position avoiding the first boundary portion L1 and the second boundary portion L2. The front end fixing portion W2a is disposed in front of the second boundary portion L2 in the thin portion 27, that is, at a position avoiding the second boundary portion L2. In the vehicle seat S of this embodiment, the fixing portion of the wire member W is disposed at a position avoiding the first boundary portion L1 and the second boundary portion L2, where the strength is reduced, thereby making it possible to improve the fixation of the wire member W to the seat cushion side frame 20 (side frame) having a different plate thickness.

[0038] The wire member W is welded at the rear end fixing portion W1a and the front end fixing portion W2a to the seat cushion side frame 20. In this configuration, the wire member W is appropriately fixed to the seat cushion side frame 20 by being welded.

[0039] 3 and 4, a first opening 28 and a second opening 29 penetrating in the seat width direction are formed in the seat cushion side frame 20. Harnesses for electrical components such as a seating sensor and a blower provided in the seat cushion S2 are inserted through the first opening 28 and the second opening 29.

[0040] The first opening 28 is disposed in the intermediate portion 26 in front of the first boundary L1 and behind the second boundary L2, that is, at a position avoiding the first boundary L1 and the second boundary L2. In other words, the first opening 28 is disposed at a position different from the first boundary L1 and the second boundary L2 in the extending direction of the seat cushion side frame 20. In this configuration, the first opening 28 is provided avoiding the boundaries where the strength is reduced, so that the opening can be appropriately disposed for the seat cushion side frame 20 having a different plate thickness.

[0041] Moreover, the second opening 29 is provided across the second boundary portion L2. Specifically, the second opening 29 is formed across the intermediate thickness portion 26 and the thin thickness portion 27. In other words, in the extending direction of the seat cushion side frame 20, the second opening 29 is disposed at a position overlapping the first boundary portion L1 and the second boundary portion L2. In this configuration, by disposing the second opening 29, which is one of the multiple openings, at a position across the boundaries, the options for the position at which the opening is set are increased, improving designability.

[0042] Moreover, the rear end fixing portion W1a is disposed between the first opening 28 and the second opening 29 in the extending direction of the seat cushion side frame 20. In this configuration, it is possible to improve the fixation of the wire member W to the seat cushion side frame 20 having a different plate thickness by avoiding the position where the strength is reduced due to the provision of the opening.

[0043] In addition, in the above embodiment, the seat cushion side frames 20 having different plate thicknesses have been described as an example, but the above technical idea can also be applied to the seatback side frame 10. In other words, it is possible to improve the fixation of the wire member to the side frames having different plate thicknesses provided on the seatback frame F1 and the seat cushion frame F2.

[0044] The vehicle seat S includes a seat cushion pad S21 (pad member) placed on the seat cushion frame F2, and a trim cover S22 (skin material) covering the seat cushion pad S21. In this configuration, it is possible to improve the fixation of the wire member W to the seat cushion side frames 20 having different plate thicknesses.

[0045] <Modification> Although the configuration of the vehicle seat S according to this embodiment has been described above, the above embodiment is merely an example for facilitating understanding of the present invention and does not limit the present invention. In other words, the present invention can be modified and improved without departing from the spirit and scope of the present invention, and of course, the present invention includes equivalents thereof.

[0046] In the above embodiment, the wire member W is welded to the seat cushion side frame 20, but the wire member W may be fixed to the seat cushion side frame 20 by fastening members at the rear end fixing portion W1a and the front end fixing portion W2a. In such a configuration, the wire member W is appropriately fixed to the seat cushion side frame 20 by being fixed by the fastening members.

[0047] In the above embodiment, the rear end fixing portion W1a and the front end fixing portion W2a are provided at positions avoiding the first boundary portion L1 and the second boundary portion L2, but either the rear end fixing portion W1a or the front end fixing portion W2a may be disposed at a position overlapping (at the same front-rear position) with the first boundary portion L1 or the second boundary portion L2 in the extending direction (front-rear direction) of the seat cushion side frame 20. In such a configuration, by disposing one of the multiple fixing portions at the boundary portion, the options for the position at which the fixing portion is set increase, improving designability.

[0048] In the above embodiment, the rear end fixing portion W1a and the front end fixing portion W2a are disposed at positions that do not overlap the first opening 28 or the second opening 29 in the extending direction (front-rear direction) of the seat cushion side frame 20, but one of the first opening 28 or the second opening 29 may be disposed at a position that overlaps the first opening 28 or the second opening 29 in the extending direction of the seat cushion side frame 20. In other words, one of the first opening 28 or the second opening 29 may be disposed at a position (same front-rear position) that overlaps the first boundary portion L1 or the second boundary portion L2 in the extending direction of the seat cushion side frame 20. In such a configuration, by disposing one of the multiple fixing portions at a position that overlaps the opening, the options for the position at which the fixing portion is set are increased, improving the designability.

[0049] The vehicle seat according to the present embodiment has been described above by taking the vehicle seat mounted on a vehicle as an example. The vehicle seat according to the present embodiment is not limited to a vehicle seat mounted on a ground-traveling vehicle having wheels such as an automobile or a train, but may be a seat mounted on an aircraft or a ship that moves on a road other than the ground. [Explanation of symbols]

[0050] S Vehicle seats (vehicle seats) S1 Seat Back S2 Seat Cushion S3 Headrest Seat frame, front F1 seat back frame F2 seat cushion frame S11 Seat back pad (pad material) S12 Trim cover (skin material) S21 Seat cushion pad (pad material) S22 Trim cover (skin material) S31 Headrest pad (pad material) S32 Trim cover (skin material) R Slide rail device RU Upper Rail RL Lower rail 10 Seat back side frame 10a Side plate part 10b Front flange 10c Rear flange 15 Upper Frame 15a Pillar Guide 16 Lower frame 20 Seat cushion side frame (side frame) 21 Pan Frame 21a Locking part 22 Rear pipe 23 Seat spring 24 Rear end connecting member 25 Thick wall part 26 Medium meat section 27 Thin-walled section 28 First Aperture (Aperture) 29 Second opening (opening) L1 1st boundary L2 2nd boundary W Wire material W1 Rear end W1a Rear end fixing part (first fixing part) W2 Front end W2a Front end fixing part (second fixing part)

Claims

1. A vehicle seat having a seat frame, The seat frame includes: A pair of side frames disposed on sides of the vehicle seat; a wire member protruding from the side frame, The end of the side frame on the seating surface side protrudes in the seat width direction, the protruding portion of the side frame has a thick portion having a first plate thickness, a middle portion having a second plate thickness formed continuously with the thick portion and thinner than the thick portion, and a thin portion having a third plate thickness formed continuously with the middle portion and thinner than the middle portion, the thick portion and the medium thickness portion are continuous at a first boundary portion, the intermediate thickness portion and the thin thickness portion are continuous at a second boundary portion, The wire member extends in an extending direction of the side frame, A vehicle seat, characterized in that a fixing portion of the wire member that is fixed to the protruding portion of the side frame is positioned at a position that avoids the first boundary portion or the second boundary portion.

2. 2. The vehicle seat according to claim 1, wherein the wire member is welded to the protruding portion of the side frame at the fixing portion.

3. 2. The vehicle seat according to claim 1, wherein the wire member is fixed to the protruding portion of the side frame at the fixing portion by a fastening member.

4. The fixing portion has a first fixing portion and a second fixing portion, 4. The vehicle seat according to claim 1, wherein one of the first fixing portion and the second fixing portion is disposed at the first boundary portion or the second boundary portion.

5. The side frame is formed with an opening penetrating in the seat width direction, The vehicle seat according to claim 4, wherein the opening is disposed at a position avoiding the first boundary portion or the second boundary portion.

6. The opening includes a first opening and a second opening, 6. The vehicle seat according to claim 5, wherein one of the first opening and the second opening is disposed across the first boundary portion or the second boundary portion.

7. The vehicle seat according to claim 6, characterized in that at least one of the first fixing portion and the second fixing portion is disposed between the first opening and the second opening in the extending direction of the side frame.

8. The vehicle seat according to claim 6 or 7, characterized in that one of the first fixing portion or the second fixing portion is arranged at a position overlapping with the first opening or the second opening in the extending direction of the side frame.

9. 9. The vehicle seat according to claim 1, wherein the seat frame is a seat cushion frame.

10. A pad member placed on the seat frame; 10. The vehicle seat according to claim 1, further comprising a cover material that covers the pad member.

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