Vehicle seats

Abstract

To provide a seat for an automobile which can suppress deformation of a side frame arranged near an expanded seating face.SOLUTION: One aspect of the present disclosure is a seat for an automobile comprising a seat cushion having an expanded seating face arranged on an outer side relative to a recliner. A cushion frame includes: a first leg and a second leg which are connected to the recliner; a first leg side frame connecting a front frame and the first leg; a second leg side frame connecting the front frame and the second leg; a first bracket fixed to both of the first leg side frame and the second leg side frame from a seat front side; and a second bracket fixed to both of the first leg side frame and the second leg side frame from a seat rear side.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to vehicle seats. [Background technology]

[0002] There is a known vehicle seat in which a leg structure is provided on a cushion frame. The leg structure has two side frames extending in the vertical direction, and is therefore easily deformed by an impact from above. Therefore, a structure for absorbing impact energy has been proposed (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-91540 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a vehicle seat that has two seating surfaces created by extending the seat cushion and cushion frame in the seat width direction, the leg position is positioned inward in the seat width direction from the center of the extended seating surface (hereinafter referred to as the "extended seating surface").

[0005] In such a vehicle seat, when a person is seated only on the extended seating surface and an impact is applied to the seat in the front-rear direction, the load is concentrated, causing the side frame of the leg located near the extended seating surface to deform significantly, resulting in a large deformation of the cushion frame.

[0006] An object of one aspect of the present disclosure is to provide a vehicle seat that can suppress deformation of a side frame that is arranged near an extended seating surface. [Means for solving the problem]

[0007] One aspect of the present disclosure is a vehicle seat (1) including a seat cushion (2) and a seat back (3), a cushion frame (4) supporting the seat cushion (2), a back frame (5) supporting the seat back (3), and a recliner (6) configured to rock the back frame (5) relative to the cushion frame (4). The seat cushion (2) has an extended seating surface (2B) disposed outboard of the recliner (6) in the seat width direction.

[0008] The cushion frame (4) has a front frame (41) extending in the seat width direction, a first leg (45) and a second leg (46) arranged below the front frame (41) and spaced apart from each other and respectively connected to the recliner (6), a first leg side frame (47) connecting the front frame (41) and the first leg (45), a second leg side frame (48) connecting the front frame (41) and the second leg (46), a first bracket (49A) fixed to both the first leg side frame (47) and the second leg side frame (48) from the front of the seat, and a second bracket (49B) fixed to both the first leg side frame (47) and the second leg side frame (48) from the rear of the seat.

[0009] The second leg side frame (48) overlaps with the extended seating surface (2B) in the up-down direction, or is located closer to the extended seating surface (2B) in the seat width direction than the first leg side frame (47). The first bracket (49A) is fixed to the second bracket (49B) from the front of the seat.

[0010] The fixed portion between the first bracket (49A) and the first leg side frame (47) is located lower than the fixed portion between the second bracket (49B) and the first leg side frame (47). The fixed portion between the first bracket (49A) and the second leg side frame (48) is located higher than the fixed portion between the second bracket (49B) and the second leg side frame (48).

[0011] According to this configuration, a load applied to the second leg side frame (48) is transmitted to the first leg side frame (47) through the first bracket (49A) and the second bracket (49B), and thus the load is dispersed within the cushion frame (4).

[0012] In addition, when a load is transmitted, the forces acting on the fixing parts between the first bracket (49A) and the second bracket (49B) and the first leg side frame (47) and the second leg side frame (48) are all in the compressive direction, so that damage due to peeling, cracks, etc. at these fixing parts is suppressed. As a result, deformation of the second leg side frame (48) when a load is concentrated on the extended seating surface (2B) is suppressed.

[0013] In one embodiment of the present disclosure, the first bracket (49A) and the second bracket (49B), the first bracket (49A) and the first leg side frame (47), and the second bracket (49B) and the second leg side frame (48) may be fixed by welding. This configuration can increase the fixing strength between the members and facilitate the transfer of load between the members.

[0014] In one aspect of the present disclosure, the first bracket (49A) may have a first straight portion (493A) extending parallel to the seat width direction. The second bracket (49B) may have a second straight portion (493B) extending parallel to the seat width direction so as to overlap with the first straight portion (493A) in the seat front-rear direction and fixed to the first straight portion (493A). With this configuration, the first bracket (49A) and the second bracket (49B) can be fixed relatively easily and the fixing strength can be increased.

[0015] In one aspect of the present disclosure, the first straight portion (493A) may have a first flange (494A) that protrudes toward the rear of the seat. The second straight portion (493B) may have a second flange (494B) that protrudes toward the front of the seat and is fixed to the first flange (494A) in a vertically overlapping manner. With this configuration, the shapes and arrangements of the first bracket (49A) and the second bracket (49B) that are fixed to each other can be adjusted relatively easily. This improves the design freedom of the cushion frame (4).

[0016] Note that the symbols in the above parentheses are examples showing the correspondence with the specific configurations etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations etc. shown by the symbols in the above parentheses. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic perspective view showing a vehicle seat according to an embodiment. [Diagram 2] FIG. 2 is a schematic perspective view of the cushion frame, the back frame, and the recliner of FIG. [Diagram 3] 3A is a schematic front view of the connecting structure of the leg side frame and the bracket in FIG. 2, and FIG. 3B is a schematic rear view of the connecting structure in FIG. 3A. [Figure 4] 4A is a schematic plan view of the connection structure of FIG. 3A, and FIG. 4B is a schematic bottom view of the connection structure of FIG. 3A. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First embodiment] [1-1. Configuration] The vehicle seat 1 shown in FIG. 1 includes a seat cushion 2, a seat back 3, a cushion frame 4, a back frame 5, and a recliner 6.

[0019] The vehicle seat 1 is used as a seat for a passenger vehicle. Specifically, the vehicle seat 1 constitutes, for example, a right seat and a center seat arranged in the second or subsequent row of the passenger vehicle.

[0020] In the following description and in each drawing, the directions refer to the directions when the vehicle seat 1 is assembled to a vehicle (i.e., a passenger car). In this embodiment, the seat width direction coincides with the left-right direction of the vehicle, and the front of the seat coincides with the front of the vehicle.

[0021] The seat cushion 2 is a portion for supporting the buttocks of a seated person. The seat back 3 is a portion for supporting the back of the seated person. The cushion frame 4 supports the seat cushion 2. The back frame 5 supports the seat back 3. The recliner 6 is configured to rock the back frame 5 relative to the cushion frame 4.

[0022] <Seat cushion> The seat cushion 2 has a main seating surface 2A and an extended seating surface 2B. One occupant can be seated on each of the main seating surface 2A and the extended seating surface 2B.

[0023] The main seating surface 2A is a portion that overlaps with the recliner 6 in the seat front-rear direction. The extended seating surface 2B is a portion that is disposed outside (i.e., on the left side) of the recliner 6 in the seat width direction. The extended seating surface 2B is narrower than the main seating surface 2A.

[0024] <Seat back> The seat back 3 has a main support surface 3A and an extended support surface 3B. The main support surface 3A is disposed behind and above the main seating surface 2A of the seat cushion 2. The extended support surface 3B is disposed behind and above the extended seating surface 2B of the seat cushion 2.

[0025] When the seat back 3 is swung toward the front of the seat, the main support surface 3A overlaps the main seating surface 2A from above, and the extended support surface 3B overlaps the extended seating surface 2B from above.

[0026] <Back frame> As shown in FIG. 2, the back frame 5 has a first back side frame 51, a second back side frame 52, a third back side frame 53, an upper frame 54, and a lower frame 55.

[0027] The first back side frame 51, the second back side frame 52, and the third back side frame 53 each extend in the up-down direction and are disposed apart from each other in the seat width direction.

[0028] The first back side frame 51 is disposed to the right of the second back side frame 52 and the third back side frame 53. The second back side frame 52 is disposed between the first back side frame 51 and the third back side frame 53 in the seat width direction.

[0029] The upper frame 54 extends in the seat width direction and connects the upper ends of the first back side frame 51, the second back side frame 52, and the third back side frame 53 together.

[0030] The lower frame 55 extends in the seat width direction, and connects the first back side frame 51, the second back side frame 52, and the third back side frame 53 below the upper frame 54.

[0031] <Recliner> The recliner 6 has a first reclining mechanism 61 and a second reclining mechanism 62 (see FIG. 1).

[0032] The first reclining mechanism 61 is attached to a lower end of the first back side frame 51. The second reclining mechanism 62 is attached to a lower end of the second back side frame 52.

[0033] The first reclining mechanism 61 and the second reclining mechanism 62 are each a known device that has a locking function that locks the back frame 5 against rocking relative to the cushion frame 4, and a rocking function that allows the back frame 5 to rock at any angle relative to the cushion frame 4.

[0034] <Cushion frame> The cushion frame 4 has a front frame 41, a first cushion side frame 42, a second cushion side frame 43, a rear frame 44, a first leg 45, a second leg 46, a first leg side frame 47, a second leg side frame 48, a first bracket 49A, and a second bracket 49B.

[0035] The front frame 41 extends in the seat width direction and has a pipe-shaped main body 41A, and a first connecting bracket 41B and a second connecting bracket 41C fixed to the main body 41A.

[0036] The first cushion side frame 42 and the second cushion side frame 43 each extend in the seat front-rear direction and are spaced apart from each other in the seat width direction. Specifically, the first cushion side frame 42 is connected to the right end of the front frame 41. The second cushion side frame 43 is connected to the left end of the front frame 41 and is located outside (i.e., on the left side) of the recliner 6 in the seat width direction.

[0037] The rear frame 44 extends in the seat width direction. The rear frame 44 connects the first cushion side frame 42 and the second cushion side frame 43 in the seat width direction, behind the front frame 41.

[0038] (Leg) The first leg 45 and the second leg 46 are disposed below the front frame 41 and spaced apart from each other, and are each connected to the recliner 6. The first leg 45 is disposed to the right of the second leg 46 and overlaps with the main seating surface 2A in the vertical direction. The second leg 46 overlaps with the extended seating surface 2B in the vertical direction.

[0039] The first leg 45 has a first base 45A, a first attachment portion 45B, and a first connecting portion 45C. The first base 45A extends in the seat front-rear direction. The first base 45A is configured to be fixed to the floor of the vehicle on which the vehicle seat 1 is installed.

[0040] The first mounting portion 45B is fixed to the rear end portion of the first base 45A. A first reclining mechanism 61 of the recliner 6 is attached to the first mounting portion 45B. The first mounting portion 45B is connected to the first back side frame 51 of the back frame 5 via the first reclining mechanism 61.

[0041] The first connecting portion 45C is a bracket fixed to an upper surface of the first base 45A. A lower end portion of the first leg side frame 47 is connected to the first connecting portion 45C in the seat width direction.

[0042] The second leg 46 has a second base 46A, a second mounting portion 46B, and a second connecting portion 46C. The first base 45A extends in the seat front-rear direction. The first base 45A is configured to be fixed to the floor of the vehicle on which the vehicle seat 1 is installed.

[0043] The second mounting portion 46B is fixed to the rear end portion of the second base 46A. A second reclining mechanism 62 of the recliner 6 is attached to the second mounting portion 46B. The second mounting portion 46B is connected to the second back side frame 52 of the back frame 5 via the second reclining mechanism 62.

[0044] The second connecting portion 46C is a bracket fixed to an upper surface of the second base 46A. A lower end portion of the second leg side frame 48 is connected to the second connecting portion 46C in the seat width direction.

[0045] (Leg side frame) The first leg side frame 47 connects the front frame 41 and the first leg 45. Specifically, an upper end of the first leg side frame 47 is connected to the first connecting bracket 41B of the front frame 41 so as to be rotatable about an axis parallel to the seat width direction. A lower end of the first leg side frame 47 is connected to the first connecting portion 45C of the first leg 45 so as to be rotatable about an axis parallel to the seat width direction.

[0046] The second leg side frame 48 connects the front frame 41 and the second leg 46. Specifically, an upper end of the second leg side frame 48 is connected to the second connecting bracket 41C of the front frame 41 so as to be rotatable about an axis parallel to the seat width direction. A lower end of the second leg side frame 48 is connected to the second connecting portion 46C of the second leg 46 so as to be rotatable about an axis parallel to the seat width direction.

[0047] The connecting portion between the first leg side frame 47 and the front frame 41 and the connecting portion between the second leg side frame 48 and the front frame 41 are located further forward of the seat than the connecting portion between the first leg side frame 47 and the first leg 45 and the connecting portion between the second leg side frame 48 and the second leg 46.

[0048] The second leg side frame 48 overlaps with the extended seating surface 2B in the up-down direction, or is positioned closer to the extended seating surface 2B than the first leg side frame 47 in the seat width direction.

[0049] Specifically, the second leg side frame 48 is disposed near the boundary between the main seating surface 2A and the extended seating surface 2B. In other words, the second leg side frame 48 is disposed on the inner side of the seat (i.e., on the right side) than the center of the extended seating surface 2B.

[0050] (bracket) 3A and 3B, the first bracket 49A and the second bracket 49B cross and span between the first leg side frame 47 and the second leg side frame 48. The first bracket 49A and the second bracket 49B are disposed below the main seating surface 2A of the seat cushion 2.

[0051] The first bracket 49A and the second bracket 49B are each a strip-shaped member. Both ends in the width direction of the first bracket 49A and the second bracket 49B are each curved in a U-shape.

[0052] The first bracket 49A is disposed further in front of the seat than the second bracket 49B. The first bracket 49A has a first upper end portion 491A, a first lower end portion 492A, and a first straight portion 493A.

[0053] The first upper end portion 491A constitutes the left end portion of the first bracket 49A, and is fixed by welding to the seat front surface of the second leg side frame 48. The first upper end portion 491A is a band-shaped portion extending from the lower right to the upper left.

[0054] The first lower end 492A constitutes the right end of the first bracket 49A, and is fixed by welding to the seat front surface of the first leg side frame 47. The first lower end 492A is a band-shaped portion extending from the upper left to the lower right.

[0055] The first straight portion 493A is a strip-shaped portion extending parallel to the sheet width direction. The first upper end portion 491A is connected to the left end of the first straight portion 493A. The first lower end portion 492A is connected to the right end of the first straight portion 493A.

[0056] The second bracket 49B is disposed further rearward on the seat than the first bracket 49A. The second bracket 49B has a second upper end portion 491B, a second lower end portion 492B, and a second straight portion 493B.

[0057] The second upper end portion 491B constitutes the right end portion of the second bracket 49B, and is fixed by welding to the seat rear surface of the first leg side frame 47. The second upper end portion 491B is a band-shaped portion extending from the lower left to the upper right.

[0058] The second lower end 492B constitutes the left end of the second bracket 49B, and is fixed by welding to the seat rear surface of the second leg side frame 48. The second lower end 492B is a band-shaped portion extending from the upper right to the lower left.

[0059] The second straight portion 493B is a strip-shaped portion extending parallel to the sheet width direction. The second upper end portion 491B is connected to the right end of the second straight portion 493B. The second lower end portion 492B is connected to the left end of the second straight portion 493B.

[0060] The thickness direction of first straight portion 493A coincides with the thickness direction of second straight portion 493B. Second straight portion 493B overlaps with first straight portion 493A in the thickness direction of second straight portion 493B. Note that "thickness direction of the straight portion" refers to the thickness direction of the flat plate portion excluding the end portions.

[0061] 4A and 4B, the first straight portion 493A has a first flange 494A and a third flange 495A that protrude toward the rear of the seat. The first flange 494A and the third flange 495A are plate-shaped portions having plate surfaces parallel to the seat width direction. The first flange 494A is located above the third flange 495A.

[0062] The second straight portion 493B has a second flange 494B and a fourth flange 495B that protrude forward of the seat. The second flange 494B and the fourth flange 495B are plate-shaped portions having a plate surface parallel to the seat width direction. The second flange 494B is located above the fourth flange 495B.

[0063] The second flange 494B is placed on the first flange 494A from below and fixed to the first flange 494A by welding. The fourth flange 495B is placed on the third flange 495A from below and fixed to the third flange 495A by welding.

[0064] The second straight portion 493B is fixed to the first straight portion 493A by a second flange 494B and a fourth flange 495B. That is, the first bracket 49A is fixed to the second bracket 49B from the front of the seat.

[0065] As shown in FIGS. 3A and 3B, a first fixed portion F1 between the first bracket 49A and the first leg side frame 47 is located lower than a second fixed portion F2 between the second bracket 49B and the first leg side frame 47.

[0066] Furthermore, the third fixed portion F3 between the first bracket 49A and the second leg side frame is located higher than the fourth fixed portion F4 between the second bracket 49B and the second leg side frame .

[0067] The first and second fixed parts F1 and F2 are arranged vertically side by side at the same position in the seat width direction when viewed from the front of the seat. Similarly, the third and fourth fixed parts F3 and F4 are arranged vertically side by side at the same position in the seat width direction when viewed from the front of the seat.

[0068] [1-2. Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) A load applied to the second leg side frame 48 is transmitted to the first leg side frame 47 via the first bracket 49A and the second bracket 49B. Therefore, the load is dispersed within the cushion frame 4.

[0069] In addition, when a load is transmitted, the forces acting on the fixing parts between the first bracket 49A and the second bracket 49B and the first leg side frame 47 and the second leg side frame 48 are all in the compressive direction, so that damage due to peeling, cracks, etc. at these fixing parts is suppressed. As a result, deformation of the second leg side frame 48 when a load is concentrated on the extended seating surface 2B is suppressed.

[0070] (1b) The leg side frames 47, 48 and the brackets 49A, 49B are fixed to each other by welding, which increases the fixing strength between the members and facilitates the transfer of load between the members.

[0071] (1c) The first bracket 49A and the second bracket 49B each have the straight portions 493A and 493B, so that the first bracket 49A and the second bracket 49B can be fixed to each other relatively easily and the fixing strength can be increased.

[0072] (1d) Since the first straight portion 493A and the second straight portion 493B have the flanges 494A and 494B, respectively, the shape and arrangement of the first bracket 49A and the second bracket 49B that are fixed to each other can be adjusted relatively easily. This improves the design freedom of the cushion frame 4.

[0073] 2. Other embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

[0074] (2a) In the vehicle seat of the above embodiment, the first leg side frame, the second leg side frame, the first bracket, and the second bracket may be fixed to one another by means other than welding (for example, bolts and nuts).

[0075] (2b) In the vehicle seat of the above embodiment, the first straight portion and the second straight portion do not necessarily have to have flanges. Furthermore, the first bracket and the second bracket do not necessarily have to have straight portions.

[0076] (2c) The vehicle seat of the above embodiment can also be applied to seats used in automobiles other than passenger cars, and seats used in vehicles other than automobiles, such as railroad cars, ships, and aircraft.

[0077] (2d) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. In addition, a part of the configuration of the above embodiments may be omitted. In addition, at least a part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. Note that all aspects included in the technical idea identified from the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0078] 1...vehicle seat, 2...seat cushion, 2A...main seating surface, 2B...extended seating surface, 3...Seat back, 4...Cushion frame, 5...Back frame, 6...Recliner, 41...front frame, 42...first cushion side frame, 43...second cushion side frame, 45...first leg, 46...second leg, 47...First leg side frame, 48...Second leg side frame, 49A...first bracket, 49B...second bracket, 61...first reclining mechanism, 62...second reclining mechanism, 491A...first upper end portion, 491B...second upper end portion, 492A...first lower end portion, 492B...second lower end portion, 493A...first straight portion, 493B...second straight portion, 494A...first flange, 494B...second flange, 495A...third flange, 495B...fourth flange.

Claims

1. A seat cushion and a seat back; A cushion frame supporting the seat cushion; A back frame supporting the seat back; A recliner configured to swing the back frame relative to the cushion frame; Equipped with The seat cushion has an extended seating surface that is disposed outboard of the recliner in a seat width direction, The cushion frame is A front frame extending in a seat width direction; a first leg and a second leg that are disposed below the front frame and spaced apart from each other and that are respectively connected to the recliner; a first leg side frame connecting the front frame and the first leg; a second leg side frame connecting the front frame and the second leg; a first bracket fixed to both the first leg side frame and the second leg side frame from a front side of the seat; a second bracket fixed to both the first leg side frame and the second leg side frame from a rear side of the seat; having The second leg side frame overlaps with the extended seating surface in the up-down direction or is located closer to the extended seating surface than the first leg side frame in the seat width direction, The first bracket is fixed to the second bracket from a front side of the seat, a fixed portion between the first bracket and the first leg side frame is located lower than a fixed portion between the second bracket and the first leg side frame, a fixed portion between the first bracket and the second leg side frame is located higher than a fixed portion between the second bracket and the second leg side frame.

2. 2. The vehicle seat according to claim 1, The vehicle seat, wherein the first bracket and the second bracket, the first bracket and the first leg side frame, and the second bracket and the second leg side frame are fixed by welding, respectively.

3. The vehicle seat according to claim 1 or 2, The first bracket has a first straight portion extending parallel to a seat width direction, The second bracket has a second straight portion that extends parallel to the seat width direction so as to overlap with the first straight portion in the seat front-rear direction, and is fixed to the first straight portion.

4. The vehicle seat according to claim 3, The first straight portion has a first flange protruding toward the rear of the seat, The second straight portion has a second flange that protrudes forward of the seat and is fixed to and overlaps the first flange in the vertical direction.

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