Back panel

Abstract

An example of a back panel is disclosed in view of the fact that many back panels having an outer edge portion configured in a substantially L-shape are configured such that a flange portion of the outer edge portion is covered with a resin cover.SOLUTION: A curl part 32 curved in a circular arc shape is arranged on at least a partial side E1 and a side E2 among an outer edge part of a panel body 31 related to a seat back. As a result, the rigidity of the panel main body 31 can be improved, and the occurrence of an edge-shaped portion in the outer edge portion of the panel main body 31 can be suppressed. As a result, the cover can be eliminated.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a back panel that forms part of a back frame of a vehicle seat. [Background technology]

[0002] For example, the back panel described in Patent Document 1 has a flange portion extending in a direction perpendicular to the plate surface of the back panel at the outer edge, as shown in Figure 6 of the document. In other words, the cross section of the outer edge of the back panel is configured to be approximately L-shaped. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-74390 Summary of the Invention [Problem to be solved by the invention]

[0004] In many back panels having a generally L-shaped outer edge, a flange portion of the outer edge is covered with a resin cover. The present disclosure discloses an example of a back panel that takes this into consideration. [Means for solving the problem]

[0005] The back panel that constitutes a part of the back frame (2) of the vehicle seat preferably has at least one of the following constituent features, for example. That is, the constituent elements are a substantially plate-shaped panel body (31) and a curled portion (32) provided on at least a portion of the outer edge of the panel body (31), the curled portion (32) being curved in an arc shape.

[0006] This can improve the rigidity of the panel body 31 and can prevent edge-like portions from being formed on the outer edge of the panel body 31. As a result, it may even be possible to eliminate the need for a cover.

[0007] The back panel may have the following configuration, for example. That is, it is desirable that the sheet has a connecting portion (32A) that connects the curled portion (32) and the panel body (31), and that the connecting portion (32A) is curved in the front-rear direction of the sheet.

[0008] Furthermore, it is desirable that the connecting portion (32A) is curved in an arc shape, and that the radius of an imaginary tangent circle (S1) contacting the curled portion (32) and the connecting portion (32A) is larger than the radius of the curled portion (32) and the radius of the connecting portion (32A).

[0009] Incidentally, the symbols in each of the parentheses above 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 parentheses above. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a diagram showing a back frame according to the first embodiment. [Figure 2] FIG. 2 is an exploded view of the back frame according to the first embodiment. [Figure 3] FIG. 2 is a diagram showing a panel main body according to the first embodiment. [Figure 4] FIG. 2 is a view showing a curled portion according to the first embodiment. [Figure 5] FIG. 2 is a diagram showing a frame according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The following "embodiments of the invention" are examples of embodiments that fall within the technical scope of the present disclosure. In other words, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

[0012] This embodiment is an example in which a seat back according to the present disclosure is applied to a seat (hereinafter referred to as a vehicle seat) installed in a vehicle such as a car. Arrows and diagonal lines indicating directions are added to each figure to make it easier to understand the relationship between the figures and the shapes of components or parts.

[0013] Therefore, the seat back is not limited to the direction indicated in each drawing. The direction indicated in each drawing is the direction when the vehicle seat according to this embodiment is assembled to a vehicle. Diagonally shaded drawings do not always represent cross-sectional views.

[0014] At least one of each member or portion described with a reference numeral is provided unless otherwise specified, such as "one." In other words, unless otherwise specified, two or more members may be provided. The seat backs shown in the present disclosure include at least one of the components, such as the members or portions, described with reference numerals, and the structural portions shown in the drawings.

[0015] (First embodiment) <1. Seatback Overview> As shown in Fig. 1, the seat back 1 according to this embodiment is a seat back used in the rear seat of a vehicle. The seat back 1 is a part that supports the back of a seated occupant. The seat back 1 is configured to include a back frame 2, a cushion (not shown), and a cover part (not shown).

[0016] The back frame 2 is a strength member that constitutes the framework of the seat back 1. The cushion is a shock-absorbing material made of urethane foam or the like. The surface portion is a cover that covers the cushion and the back frame 2.

[0017] The back frame 2 is provided with a fixing portion 21, a first connecting portion 22, a second connecting portion 23, etc. The fixing portion 21 is a portion that is fixed to the vehicle, and is provided at an upper side of one end of the back frame 2 in the width direction (at the upper right side in this embodiment).

[0018] Specifically, a latch device (not shown) that engages with a striker (not shown) provided on the vehicle is attached to the fixing portion 21. The latch device is a device that can switch between a state in which it is engaged with the striker and a state in which it is disengaged.

[0019] The first connecting portion 22 and the second connecting portion 23 are portions rotatably connected to the vehicle. The first connecting portion 22 is provided below one end side (the right end side in this embodiment) of the back frame 2 in the width direction.

[0020] The second connecting portion 23 is provided below the other widthwise end side (the left end side in this embodiment) of the back frame 2. The second connecting portion 23 is connected to the vehicle via a bracket 23A.

[0021] When the striker and the latch device are engaged, the seat back 1 is fixed to the vehicle in an upright position as shown in FIG. 1. When the striker and the latch device are disengaged, the seat back 1 is fixed to the vehicle in an upright position as shown in FIG. 1. It becomes possible to rotate forward around point 3.

[0022] <2. Back frame configuration> As shown in Fig. 2, the back frame 2 includes at least a back panel 3 and a frame 4. The back panel 3 is a metal panel material having a substantially rectangular plate shape. The frame 4 is a metal skeleton having a rectangular frame shape. The frame 4 is joined to the back panel 3 (specifically, the panel main body 31 described below) by welding.

[0023] <2.1 Back panel details> The back panel 3 is configured to have at least a panel main body 31 and a curled portion 32. In this embodiment, the panel main body 31 (including bead portions 33 and 34, which will be described later) and the curled portion 32 are an integral product formed by applying plastic processing to a metal plate.

[0024] <Panel body> 3, the panel main body 31 is a generally rectangular plate-shaped portion provided with a plurality of bead portions 33, 34. Each of the plurality of bead portions 33, 34 is formed by a ridge that protrudes from the plate surface of the panel main body 31 in the plate thickness direction.

[0025] The bead portion 33 is configured to have a first oblique bead portion 33A and a second oblique bead portion 33B. As shown in Fig. 1, the first oblique bead portion 33A is provided in the panel main body 31, i.e., in a position on the back panel 3 close to the fixed portion 21, and is configured as a protrusion extending in a direction inclined with respect to the seat width direction and the up-down direction.

[0026] The second oblique bead portion 33B is provided in a diagonal position relative to the first oblique bead portion 33A on the panel main body 31, i.e., the back panel 3, and is configured as a protrusion extending in a direction inclined relative to the seat width direction and the up-down direction.

[0027] In other words, the first diagonal bead portion 33A is a rivet-shaped bead portion that connects the upper end edge of the back panel 3 to the right end edge of the back panel 3, and the second diagonal bead portion 33B is a rivet-shaped bead portion that connects the lower end edge of the back panel 3 to the left end edge of the back panel 3.

[0028] The plurality of bead portions 34 are bead portions configured with protrusions extending in the up-down direction (hereinafter, the bead portions 34 are referred to as vertical bead portions 34). Incidentally, when the seat back 1 is in a reclined position, the vertical bead portions 34 become protrusions extending in the front-to-rear direction of the vehicle.

[0029] The panel main body 31 according to this embodiment, that is, the back panel 3, is provided with a mounting portion 6 for a retractor 5. The retractor 5 is a device for winding up the webbing (belt portion) 5A of the seat belt.

[0030] Of the multiple vertical bead portions 34A to 34J, the vertical bead portions 34C, 34D adjacent to the mounting portion 6 extend to positions where they overlap with the upper beam portion 41 described below. Specifically, the vertical bead portions 34C, 34D extend to the upper edge of the panel main body 31, as shown in FIG.

[0031] The vertical bead portions 34C, 34D extend from at least a portion below the lower end of the mounting portion 6 to the upper edge of the panel main body 31. Incidentally, the vertical bead portions 34C, 34D according to this embodiment extend from the lower edge to the upper edge of the panel main body 31.

[0032] <Curled part> As shown in Fig. 4, the curled portion 32 is a portion of the outer edge of the panel body 31 that is curved in an arc shape. Incidentally, "curved in an arc shape" means that the circumferential angle of the arc portion is, for example, 180 This refers to a structure curved in an arc shape of 270° or more (in this embodiment, 270° or more).

[0033] 3, the curled portion 32 is provided on at least a portion of the outer edge of the panel main body 31 (in this embodiment, outer edge portions E1 and E2). As shown in FIG. 4, the entire curled portion 32 is shifted in the front-to-rear direction of the seat (toward the front in this embodiment) with respect to the panel main body 31.

[0034] Furthermore, the connecting portion 32A connecting the curled portion 32 and the panel main body 31 is curved forward in an arc shape. The radius of a virtual tangent circle S1 where the curled portion 32 and the connecting portion 32A meet is larger than the radius of curvature r1 of the curled portion 32 and the radius r2 of the connecting portion 32A.

[0035] <2.2 Frame details> 2, the frame 4 is configured in a rectangular frame shape that follows the outer edge of the panel main body 31. Specifically, it is configured to include an upper beam portion 41, a lower beam portion 42, a first side frame 43, and a second side frame 44.

[0036] The upper beam portion 41 is a frame that is joined to the upper end side of the back panel 3, i.e., the panel main body 31, and extends in the seat width direction. The upper beam portion 41 is provided with a receiving portion 45. As shown in FIG. 1, the receiving portion 45 is a portion that receives the tension acting on the webbing 5A.

[0037] 5, the receiving portion 45 according to the present embodiment cooperates with the upper beam portion 41 to form a rectangular closed curved frame portion through which the webbing 5A is inserted. The tension acting on the receiving portion 45 is transmitted to the back frame 2 via the upper beam portion 41.

[0038] 2, the lower beam portion 42 is a frame joined to the lower end side of the panel main body 31 and extending in the seat width direction. The first side frame 43 and the second side frame 44 connect the extension direction end of the upper beam portion 41 and the extension direction end of the lower beam portion 42.

[0039] 5, gusset plates 46A to 46D are joined to the respective connecting portions of the upper beam portion 41, the lower beam portion 42, the first side frame 43, and the second side frame 44. The gusset plates 46A to 46D are reinforcing plates that reinforce the connections.

[0040] In this embodiment, the cross-sectional shapes of the upper beam portion 41, the lower beam portion 42, and the second side frame 44 are configured to be approximately C-shaped or U-shaped with an opening on the rear side. These openings are closed by the panel main body 31.

[0041] The first side frame 43 is configured to have a rectangular closed cross-sectional shape by itself. This is because the first side frame 43 is provided with the fixing portion 21. The panel main body 31 according to this embodiment is also joined to the back surface of the first side frame 43.

[0042] 3. Features of the seat back according to this embodiment At least a part of the outer edge of the panel main body 31 of the seat back 1 according to this embodiment is provided with a curled portion 32 curved in an arc shape.

[0043] This can improve the rigidity of the panel body 31 and can prevent edge-like portions from being formed on the outer edge of the panel body 31. As a result, it may even be possible to eliminate the cover.

[0044] (Other embodiments) In the above embodiment, the curled portion 32 is provided only in a part of the panel body 31. However, the present disclosure is not limited to this. That is, the present disclosure may have a configuration in which the curled portion 32 is provided around the entire outer edge of the panel main body 31, for example.

[0045] In the above-described embodiment, the curled portion 32 is configured to be located on the front side of the panel main body 31. However, the present disclosure is not limited to this. That is, the present disclosure may be configured, for example, such that the curled portion 32 is located on the rear side of the panel main body 31, or such that the center of the curled portion 32 is located on an extension of the panel main body 31.

[0046] In the above-described embodiment, the panel body 31 is configured to have a plurality of bead portions 33, 34. However, the positions and extending directions of the plurality of bead portions 33, 34 according to the present disclosure are not limited to the configuration shown in FIG.

[0047] In the above-described embodiment, the vehicle seat according to the present disclosure is applied to a vehicle. However, the application of the invention disclosed in this specification is not limited thereto. That is, the present disclosure can also be applied to seats used in vehicles such as railway cars, ships, and aircraft, as well as stationary seats used in theaters, homes, etc.

[0048] Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the spirit of the disclosure described in the above-described embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-described embodiments are combined, or a configuration in which any of the components illustrated or described with reference numerals in the above-described embodiments is eliminated. [Explanation of symbols]

[0049] 1... Seat back 3... Back panel 4... Frame 5... Retractor 6... Mounting part 21…Fixed part 22... 1st connection part 23…Second connection part 23A... Bracket 31... Panel body 32... Curl section

Claims

1. In a back panel that constitutes a part of a back frame of a vehicle seat, A substantially plate-shaped panel body; a curled portion provided on at least a part of the outer edge of the panel body, the curled portion being curved in an arc shape; A back panel with

2. The back panel according to claim 1 , further comprising a connecting portion that connects the curled portion and the panel body, the connecting portion being curved in the front-rear direction of the seat.

3. The connecting portion is curved in an arc shape, The back panel according to claim 2 , wherein the radius of an imaginary tangent circle contacting the curled portion and the joint portion is larger than the radius of the curled portion and the radius of the joint portion.

Images