Vehicle seats

Abstract

To provide a vehicle seat whose fixing strength between a bracket and a back frame supporting an armrest.SOLUTION: A vehicle seat includes: a seat cushion; a seat back; armrests fitted to the seat back; a back frame supporting the seat back; a supporting bracket supporting the armrests; and a fixing patch. The back frame is arranged at an end part in a seat width direction and has a cylindrical closed cross section part extending in the direction crossing both a seat width direction and a seat back and forth direction. The supporting bracket is fixed to a surface at the back of the seat of the closed cross section part. The fixing patch has a first fixing part fixed to the support bracket and a second fixing part fixed to a surface in front of the seat of the closed cross section part.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] There is known a vehicle seat in which a support bracket for attaching an armrest is fixed to a back frame that supports a seat back (see Patent Document 1). The support bracket supports the armrest so that it is swingable. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-197078 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the armrest support bracket is fixed to the side surface of the back frame as in the above publication, the fixing strength of the support bracket is insufficient to withstand forces acting on the vehicle seat from the front-rear direction of the seat.

[0005] On the other hand, when the support bracket is fixed to the rear surface of the back frame, if a force acts on the vehicle seat from behind, the force compresses the fixed area between the support bracket and the back frame, so that the decrease in the fixing strength is suppressed. However, if a force acts on the vehicle seat from the front, the force pulls the fixed area, which may cause problems such as detachment of the support bracket and deformation or damage of the back frame.

[0006] An object of one aspect of the present disclosure is to provide a vehicle seat in which the fixing strength between a bracket supporting an armrest and a back frame is increased. [Means for solving the problem]

[0007] One aspect of the present disclosure is a vehicle seat (1) comprising a seat cushion (2), a seat back (3B), an armrest (4) attached to the seat back (3B), a back frame (5) supporting the seat back (3B), a support bracket (6) supporting the armrest (4), and a fixing patch (8).

[0008] The back frame (5) is disposed at an end of the back frame (5) in the seat width direction and has a cylindrical closed cross-sectional portion (52) extending in a direction intersecting both the seat width direction and the seat front-rear direction. The support bracket (6) is fixed to a seat rear surface of the closed cross-sectional portion (52). The fixing patch (8) has a first fixing portion (83) fixed to the support bracket (6) and a second fixing portion (84) fixed to a seat front surface of the closed cross-sectional portion (52).

[0009] According to this configuration, the support bracket (6) and the fixing patch (8) are fixed to the closed cross-sectional portion (52) so as to sandwich the closed cross-sectional portion (52) in the front-rear direction of the seat. Therefore, a force acting on the vehicle seat (1) from the front or rear is distributed in the front-rear direction of the seat between the fixing region between the support bracket (6) and the closed cross-sectional portion (52) and the fixing region between the fixing patch (8) and the closed cross-sectional portion (52). As a result, the fixing strength between the support bracket (6) and the back frame (5) is increased.

[0010] In addition, the thicknesses of the closed cross-sectional portion 52, the support bracket 6, and the fixing patch 8 can be reduced due to the increased fixing strength between the support bracket 6 and the back frame 5. As a result, the vehicle seat 1 can be made lighter.

[0011] In one embodiment of the present disclosure, the support bracket (6) and the second fixing portion (84) may each be welded to the closed cross-sectional portion (52). The first fixing portion (83) may be welded to the support bracket (6). With such a configuration, the fixing strength between the support bracket (6) and the back frame (5) can be appropriately increased. Also, the number of parts of the vehicle seat (1) can be reduced.

[0012] In one aspect of the present disclosure, the closed cross-sectional portion (52) may have a rectangular cross-section whose length in the seat width direction is greater than its length in the seat front-rear direction. With this configuration, it is possible to increase the fixing area of ​​the support bracket (6) and the fixing patch (8) relative to the closed cross-sectional portion (52) while reducing the dimension of the back frame (5) in the seat front-rear direction.

[0013] 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]

[0014] [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 showing a back frame, a support bracket and a fixing patch of the vehicle seat of FIG. [Diagram 3] FIG. 3 is a schematic perspective view showing a back frame, a support bracket and a fixing patch of the vehicle seat of FIG. [Figure 4] FIG. 4 is a schematic rear view showing the back frame and the support bracket of the vehicle seat of FIG. [Diagram 5] 5A is a schematic cross-sectional end view taken along line VA-VA in FIG. 4, and FIG. 5B is a schematic cross-sectional end view taken along line VB-VB in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] 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 first seat back 3A, a second seat back 3B, an armrest 4, and a back frame 5.

[0016] The seat cushion 2 is a portion for supporting the buttocks of a seated occupant. The first seat back 3A and the second seat back 3B are portions for supporting the back of the seated occupant. The first seat back 3A and the second seat back 3B are separate from each other and can be swung in the front-rear direction relative to the seat cushion 2.

[0017] The armrest 4 is a portion on which an occupant can rest his / her arm, and is attached to the second seat back 3B so as to be swingable in the front-rear direction of the seat with respect to the second seat back 3B.

[0018] Specifically, the armrest 4 is configured to be movable between a stored position where it is stored in the second seat back 3B and a deployed position where it is deployed above the seat cushion 2 as shown in Fig. 1. The armrest 4 moves to the deployed position by swinging forward from the stored position.

[0019] The back frame 5 is a member that supports the second seat back 3B, and is disposed inside the second seat back 3B. The back frame 5 swings relative to the seat cushion 2 together with the second seat back 3B.

[0020] The vehicle seat 1 of this embodiment is used as a seat for a passenger vehicle. Note that the directions in the following description and in each drawing refer to the directions in a state in which the vehicle seat 1 is assembled to a vehicle (i.e., a passenger vehicle). 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 vehicle seat 1 further includes a first support bracket 6, a second support bracket 7, a first fastening patch 8, and a second fastening patch 9, which are shown in FIGS.

[0022] <Back frame> The back frame 5 has a central portion 51, a first closed cross-sectional portion 52, and a second closed cross-sectional portion 53. The central portion 51 is a panel-shaped portion disposed in the center of the back frame 5 in the seat width direction.

[0023] The first closed cross-sectional portion 52 is disposed at an end portion in the seat width direction (i.e., on the right side of the central portion 51) of the back frame 5. The first closed cross-sectional portion 52 is a cylindrical portion extending in a direction intersecting both the seat width direction and the seat front-rear direction (i.e., in the up-down direction when the second seat back 3B is not tilted forward).

[0024] 5A, the first closed cross-sectional portion 52 has a rectangular cross-section whose length in the seat width direction is greater than its length in the seat front-rear direction. The first closed cross-sectional portion 52 has a rear panel 52A that forms the rear surface and a front panel 52B that forms the front surface.

[0025] The rear panel 52A is disposed so that its thickness direction is parallel to the seat front-rear direction. The rear panel 52A is connected to the central portion 51. Specifically, the rear panel 52A is integrated with the panel that constitutes the central portion 51. The right end portion of the rear panel 52A is folded toward the front of the seat.

[0026] The front panel 52B is disposed in front of the rear panel 52A. The front panel 52B is joined to the rear panel 52A at a first joint portion 52C and a second joint portion 52D. The rear panel 52A and the front panel 52B are joined by, for example, welding.

[0027] The first joint 52C is a portion where the left end of the front panel 52B overlaps with the rear panel 52A in the seat front-rear direction and is located to the left of the closed cross section. The second joint 52D is a portion where the right end of the front panel 52B overlaps with the right end of the rear panel 52A in the seat width direction and is provided on a side of the closed cross section.

[0028] 2, the second closed cross-sectional portion 53 is disposed at an end portion of the back frame 5 opposite to the first closed cross-sectional portion 52 in the seat width direction (i.e., on the left side of the central portion 51). The second closed cross-sectional portion 53 is a tubular portion extending parallel to the first closed cross-sectional portion 52 (i.e., in a direction intersecting both the seat width direction and the seat front-rear direction).

[0029] 5B, the second closed cross-sectional portion 53 has a rectangular cross-section whose length in the seat width direction is greater than its length in the seat front-rear direction. The second closed cross-sectional portion 53 has a rear panel 53A that forms a rear surface and a front panel 53B that forms a front surface.

[0030] The rear panel 53A is disposed so that its thickness direction is parallel to the seat front-rear direction. The rear panel 53A is connected to the central portion 51. Specifically, the rear panel 53A is integrated with the panels that constitute the central portion 51. The left end portion of the rear panel 53A is folded toward the front of the seat.

[0031] The front panel 53B is disposed in front of the rear panel 53A. The front panel 53B is joined to the rear panel 53A at a first joint portion 53C and a second joint portion 53D. The rear panel 53A and the front panel 53B are joined by, for example, welding.

[0032] The first joint 53C is a portion where the right end of the front panel 53B is overlapped with the rear panel 53A in the front-rear direction of the sheet, and is located to the right of the closed cross section. The second joint 53D is a portion where the left end of the front panel 53B is overlapped with the left end of the rear panel 53A in the width direction of the sheet, and is provided on a side surface of the closed cross section.

[0033] <Support bracket> The first support bracket 6 and the second support bracket 7 shown in FIG. 2 support the armrest 4 so that it can swing.

[0034] The first support bracket 6 and the second support bracket 7 are disposed apart from each other in the seat width direction. In addition, the first support bracket 6 and the second support bracket 7 are attached to the back frame 5 so as to protrude from the back frame 5 toward the front of the seat.

[0035] The first support bracket 6 is made of a pressed plate material. As shown in Fig. 5A, the thickness of the first support bracket 6 is greater than the thickness of the panel that constitutes the first closed cross-sectional portion 52. The first support bracket 6 has an armrest support portion 61, a frame abutment portion 62, and a bracket fixing portion 63.

[0036] The armrest support portion 61 is a portion that protrudes further forward than the back frame 5. A bolt that serves as a pivot axis of the armrest 4 is inserted into the armrest support portion 61 so as to be rotatable about its axis. A rear end portion of the armrest support portion 61 is located to the right of the first closed cross-sectional portion 52.

[0037] The frame abutment portion 62 is a portion that extends from the rear end of the armrest support portion 61 toward the inside in the seat width direction (i.e., the left side). The front surface of the frame abutment portion 62 (i.e., the surface in front of the seat) abuts against the rear surface of the first closed cross-sectional portion 52 (i.e., the surface in the rear of the seat). In other words, the frame abutment portion 62 is overlapped with a part of the rear surface of the first closed cross-sectional portion 52.

[0038] The bracket fixing portion 63 is a portion fixed to the rear surface of the first closed cross-sectional portion 52. The bracket fixing portions 63 are provided at the left end, upper end, and lower end of the frame abutment portion 62 (see FIG. 4). In this embodiment, the bracket fixing portions 63 are fixed to the first closed cross-sectional portion 52 by welding.

[0039] The second support bracket 7 shown in Fig. 3 is made of a pressed plate material. As shown in Fig. 5B, the thickness of the second support bracket 7 is greater than the thickness of the panel that constitutes the second closed cross-sectional portion 53. The second support bracket 7 has an armrest support portion 71, a frame abutment portion 72, and a bracket fixing portion 73.

[0040] The armrest support portion 71 is a portion that protrudes further forward than the back frame 5. A bolt that serves as a pivot axis for the armrest 4 is rotatably inserted into the armrest support portion 71. A rear end portion of the armrest support portion 71 abuts against a side surface of the second closed cross-sectional portion 53 from the outer side in the seat width direction.

[0041] The frame abutment portion 72 is a portion that extends from the rear end of the armrest support portion 71 toward the inside in the seat width direction (i.e., the right side). The front surface of the frame abutment portion 72 abuts against the rear surface of the second closed cross-sectional portion 53. In other words, the frame abutment portion 72 is overlapped with a part of the rear surface of the second closed cross-sectional portion 53.

[0042] The bracket fixing portion 73 is a portion fixed to the seat rear surface of the second closed cross-sectional portion 53. The bracket fixing portion 73 is provided on the right end, upper end, and lower end of the frame abutment portion 72 (see FIG. 4). In this embodiment, the bracket fixing portion 73 is fixed to the second closed cross-sectional portion 53 by welding.

[0043] <Fixing patch> 5A, the first fixing patch 8 is a plate-shaped member fixed to the first support bracket 6 and the back frame 5. The thickness of the first fixing patch 8 is greater than the thickness of the panel that constitutes the first closed cross-sectional portion 52.

[0044] The first fixing patch 8 has a first contact portion 81, a second contact portion 82, a first fixing portion 83, and a second fixing portion 84.

[0045] The first contact portion 81 is a portion that overlaps with the armrest support portion 61 of the first support bracket 6 in the seat width direction. The first contact portion 81 extends in the seat front-rear direction and abuts against the inner surface (i.e., the left surface) of the armrest support portion 61 in the seat width direction.

[0046] The second abutment portion 82 is a portion overlapping the first closed cross-sectional portion 52 in the seat front-rear direction. The second abutment portion 82 extends leftward from the rear end of the first abutment portion 81 and abuts against the front surface of the first closed cross-sectional portion 52. The second abutment portion 82, together with the frame abutment portion 62 of the first support bracket 6, is disposed so as to sandwich the first closed cross-sectional portion 52 in the seat front-rear direction.

[0047] The first fixed portion 83 is a portion that is fixed to the armrest support portion 61 of the first support bracket 6 by welding. In this embodiment, the first fixed portion 83 is provided on the edge of a through hole provided in the first abutment portion 81. The first fixed portion 83 is located further forward of the seat than the first closed cross-sectional portion 52.

[0048] The second fixing portion 84 is a portion that is fixed by welding to the front surface of the first closed cross-sectional portion 52. The second fixing portion 84 is provided at the left end, upper end, and lower end of the second abutting portion 82 (see FIG. 2). The upper end and lower end of the second fixing portion 84 are inclined with respect to the sheet width direction in order to increase the weld length.

[0049] 5B, the second fixing patch 9 is a plate-shaped member fixed to the second support bracket 7 and the back frame 5. The thickness of the second fixing patch 9 is greater than the thickness of the panel that constitutes the second closed cross-sectional portion 53.

[0050] The second fixing patch 9 has a first contact portion 91 , a second contact portion 92 , a first fixing portion 93 , and a second fixing portion 94 .

[0051] The first contact portion 91 is a portion that is overlapped in the seat width direction with the armrest support portion 71 of the second support bracket 7. The first contact portion 91 extends in the seat front-rear direction and contacts the inner surface (i.e., the right surface) of the armrest support portion 71 in the seat width direction.

[0052] The second abutment portion 92 is a portion overlapping the second closed cross-sectional portion 53 in the seat front-rear direction. The second abutment portion 92 extends rightward from the rear end of the first abutment portion 91 and abuts against a front surface of the second closed cross-sectional portion 53. The second abutment portion 92, together with the frame abutment portion 72 of the second support bracket 7, is disposed so as to sandwich the second closed cross-sectional portion 53 in the seat front-rear direction.

[0053] The first fixed portion 93 is a portion that is fixed to the armrest support portion 71 of the second support bracket 7 by welding. In this embodiment, the first fixed portion 93 is provided at a front end portion of the first abutment portion 91. The first fixed portion 93 is located further forward of the second closed cross-sectional portion 53 than the seat.

[0054] The second fixing portion 94 is a portion that is fixed by welding to the front surface of the second closed cross-sectional portion 53. The second fixing portion 94 is provided on the right end, upper end, and lower end of the second abutting portion 92 (see FIG. 3). The upper end and lower end of the second fixing portion 94 are inclined with respect to the sheet width direction in order to increase the weld length.

[0055] [1-2. Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) The first support bracket 6 and the first fixing patch 8 are fixed to the first closed cross-sectional portion 52 so as to sandwich the first closed cross-sectional portion 52 in the front-rear direction of the seat. Therefore, a force acting on the vehicle seat 1 from the front or rear is dispersed in the front-rear direction of the seat between the fixing region between the first support bracket 6 and the first closed cross-sectional portion 52 and the fixing region between the first fixing patch 8 and the first closed cross-sectional portion 52. As a result, the fixing strength between the first support bracket 6 and the back frame 5 is increased.

[0056] Similarly, by fixing the second support bracket 7 and the second fixing patch 9 to the second closed cross-sectional portion 53, the fixing strength between the second support bracket 7 and the back frame 5 is also increased.

[0057] (1b) Due to the improvement in the fixing strength between the support brackets 6, 7 and the back frame 5, it is possible to reduce the thicknesses of the first closed cross-sectional portion 52, the second closed cross-sectional portion 53, the first support bracket 6, the second support bracket 7, the first fixing patch 8, and the second fixing patch 9. As a result, it is possible to reduce the weight of the vehicle seat 1.

[0058] (1c) The support brackets 6, 7 and the second fixing portions 84, 94 of the fixing patches 8, 9 are welded to the closed cross-sectional portions 52, 53, and the first fixing portions 83, 93 of the fixing patches 8, 9 are welded to the support brackets 6, 7, thereby making it possible to adequately increase the fixing strength between the support brackets 6, 7 and the back frame 5. In addition, the number of parts of the vehicle seat 1 can be reduced.

[0059] (1d) Since the closed cross-sectional portions 52, 53 have a rectangular cross-section, the dimension of the back frame 5 in the seat front-rear direction can be reduced while increasing the fixing areas of the support brackets 6, 7 and the fixing patches 8, 9 relative to the closed cross-sectional portions 52, 53.

[0060] 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.

[0061] (2a) In the vehicle seat 1 of the above embodiment, the cross sections of the first closed cross-sectional portion 52 and the second closed cross-sectional portion 53 do not necessarily have to be rectangular in shape with a length in the seat width direction greater than a length in the seat front-rear direction.

[0062] (2b) In the vehicle seat 1 of the above embodiment, the support brackets 6, 7 and the second fixing portions 84, 94 of the fixing patches 8, 9 do not necessarily have to be welded to the closed cross-sectional portions 52, 53. For example, the support brackets 6, 7 and the second fixing portions 84, 94 of the fixing patches 8, 9 may be fixed to the closed cross-sectional portions 52, 53 by fastening using bolts or rivets. Similarly, the first fixing portions 83, 93 of the fixing patches 8, 9 may be fixed to the support brackets 6, 7 by fastening.

[0063] (2c) In the vehicle seat 1 of the above embodiment, the back frame 5 does not necessarily have to have the central portion 51. For example, the back frame 5 may have two side frames, each having a closed cross-sectional portion, a panel or pipe connecting the upper ends of the two side frames, and a panel or pipe connecting the lower ends of the two side frames.

[0064] (2d) The vehicle seat 1 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.

[0065] (2e) 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]

[0066] 1...vehicle seat, 2...seat cushion, 3A...first seat back, 3B…Second seat back, 4…Armrest, 5…Back frame, 6...first support bracket, 7...second support bracket, 8...first fixing patch, 9...second fixing patch, 51...center portion, 52...first closed cross-sectional portion, 52A...rear panel, 52B: front panel; 52C: first joint; 52D: second joint; 53... second closed cross-sectional portion, 53A... rear panel, 53B... front panel, 53C...first joint part, 53D...second joint part, 61,71...armrest support part, 62, 72...frame abutment portion; 63, 73...bracket fixing portion; 81,91…1st connecting part, 82,92…2nd connecting part, 83,93…1st fixing part, 84,94…Second fixed part.

Claims

[Claim 1] Seat cushion and Seat back and An armrest attached to the seat back; A back frame supporting the seat back; A support bracket for supporting the armrest; A fixing patch, Equipped with The back frame is disposed at an end of the back frame in a seat width direction and has a cylindrical closed cross-sectional portion extending in a direction intersecting both the seat width direction and the seat front-rear direction, The support bracket is welded only to a rear surface of the seat of the closed cross-sectional portion, The fixing patch comprises: A first fixing portion welded to the support bracket; A second fixing portion welded to a front surface of the seat of the closed cross-section portion; having The closed cross-sectional portion has a rectangular cross-section whose length in the seat width direction is greater than its length in the seat front-rear direction, A portion of the support bracket through which the pivot axis of the armrest is inserted protrudes forward of the seat beyond the back frame.

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