Seat frame

Abstract

To disclose an example of a seat frame capable of reducing joining failure.SOLUTION: In the joining part of the back frame, an outer edge 32 of the first joining range 31 is positioned outside an outer edge 72 of the second joining range 71, and a part outside the outer edge 72 of the second joining range 71 in the second frame 7 is separated from the first frame 3 more than the second joining range 71. As a result, the first joining range 31 and the second joining range 71 can be brought into close contact with each other without a gap, and thus the first joining range 31 and the second joining range 71 can be reliably joined.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a frame for use in a vehicle seat. [Background technology]

[0002] As described in Patent Document 1, for example, the seat frame is configured by joining a plurality of frames together by welding or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2022-167380 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure discloses an example of a seat frame that can reduce each of the joint defects. [Means for solving the problem]

[0005] A frame of a vehicle seat, which comprises a first frame (3) and a second frame (7) joined to the first frame (3), desirably has at least one of the following constituent features:

[0006] In other words, the constituent elements are that at least a portion of the outer edge of the first joining area (31) that overlaps with the outer edge of the first frame (3) is located outside the outer edge of the second joining area (71), and that the portion of the second frame (7) that is outside the outer edge of the second joining area (71) is farther away from the first frame (3) than the second joining area (71).

[0007] The first joining area (31) refers to a planar area of ​​the first frame (3) that includes the joining portion with the second frame (7) and faces the second frame (7). The second joining area (71) refers to a planar area of ​​the second frame (7) that includes the joining portion with the first frame (3) and faces the first frame (3).

[0008] This makes it possible to bring the first joining area (31) and the second joining area (71) into tight contact with each other without any gaps, and therefore makes it possible to reliably join the first joining area (31) and the second joining area (71).

[0009] That is, when the first frame (3) and the second frame (7) are joined by welding or the like, it is desirable that the joining work be carried out in a state where the joining surfaces are in close contact with each other without any gaps. However, for example, if there is a burr or the like on the edge of the joining surface, there is a risk that the burr will cause a gap to form on the joining surface.

[0010] In contrast, in the seat frame, at least a portion of the outer edge of the first joining area (31) that overlaps with the outer edge of the first frame (3) is located outside the outer edge of the second joining area (71), and the portion of the second frame (7) that is outside the outer edge of the second joining area (71) is farther away from the first frame (3) than the second joining area (71).

[0011] Therefore, even if there are burrs or the like on the end of the joining surface, gaps on the joining surface caused by the burrs will not occur. Therefore, it is possible to make the first joining area (31) and the second joining area (71) adhere to each other without any gaps, so that the first joining area (31) and the second joining area (71) can be joined reliably.

[0012] The seat frame may have the following configuration, for example. That is, it is desirable that the second joining area (71) is formed by a convex portion that protrudes toward the first frame (3).

[0013] 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]

[0014] [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 part A in FIG. [Figure 3] FIG. 2 is a diagram showing the configuration of a joint A. [Figure 4] FIG. 4 is an enlarged view of part B in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] 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.

[0016] This embodiment is an example in which the seat frame according to the present disclosure is applied to a back frame of a seat (hereinafter referred to as a vehicle seat) to be mounted 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.

[0017] Therefore, the back frame 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 the present embodiment is assembled to a vehicle. Drawings indicated with diagonal lines do not always represent cross-sectional views.

[0018] At least one of a 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 of the member may be provided. The back frame shown in the present disclosure includes at least one of the components, such as the member or portion, described with a reference numeral, and the structural portion shown in the drawings.

[0019] (First embodiment) <1.Back frame overview> 1, the back frame 1 is a frame-like frame that constitutes the framework of the seat back 2. The seat back 2 is a portion that supports the back of a seated occupant.

[0020] The back frame 1 includes at least a first side frame 3, a second side frame 5, an upper frame 7, and a lower frame 9. The first side frame 3 and the second side frame 5 are strength members that extend substantially in the vertical direction.

[0021] The second side frame 5 is disposed at a position offset in the seat width direction (to the left in FIG. 1) with respect to the first side frame 3. The upper frame 7 is a strength member that extends in the seat width direction and connects the upper end sides of the first side frame 3 and the second side frame 5.

[0022] The lower frame 9 is a reinforcing member that extends in the seat width direction and connects the lower end sides of the first side frame 3 and the second side frame 5. The second side frame 5, the upper frame 7 and the lower frame 9 are made of metal.

[0023] The frames are joined by welding (laser welding in this embodiment). The thick solid lines W shown in Fig. 1 indicate weld marks made by laser welding. In this embodiment, a welding worker (including an automatic welder) performs welding by irradiating a laser beam from the front side.

[0024] <2. Details of joints> The following explanation is about joint A in Figure 1. The other joints are the same as joint A, so explanations of the other joints are omitted. In the following explanation, the first side frame 3 is referred to as the first frame 3, and the upper frame 7 is referred to as the second frame 7.

[0025] 2, the joint A has a first joint area 31 and a second joint area 71. The first joint area 31 is a planar area including the joint portion of the first frame 3 with the second frame 7, and is the area surrounded by a two-dot chain line facing the second frame 7.

[0026] The second joining area 71 is a planar area including the joining portion of the second frame 7 with the first frame 3, and is an area facing the first frame 3 and surrounded by a two-dot chain line. As shown in Figure 3, the portion 32 of the outer edge of the first joining area 31 that overlaps with the outer edge of the first frame 3 is located outside the outer edge 72 of the second joining area 71, and the portion of the second frame 7 that is outside the outer edge 72 of the second joining area 71 is farther away from the first frame 3 than the second joining area 71, as shown in Figure 4.

[0027] Specifically, the second bonding area 71 according to this embodiment is configured with a convex portion that protrudes toward the first frame 3, i.e., toward the first bonding area 31. Therefore, a gap δ exists between the outer edge 32 of the first bonding area 31 and the second frame 7.

[0028] 3. Features of the back frame according to this embodiment At the joint A of the back frame 1 in this embodiment, as shown in Figure 4, the outer edge 32 of the first joint area 31 is located outside the outer edge 72 of the second joint area 71, and the portion of the second frame 7 outside the outer edge 72 of the second joint area 71 is farther away from the first frame 3 than the second joint area 71.

[0029] This may enable the first joining area 31 and the second joining area 71 to be in close contact with each other without any gaps, so that the first joining area 31 and the second joining area 71 may be reliably joined together. That is, when joining the first frame 3 and the second frame 7, it is desirable to carry out the joining work with the joining surfaces in close contact with each other without any gaps. However, for example, if there are burrs or the like on the edges of the joining surfaces, the burrs will cause gaps to form on the joining surfaces.

[0030] For example, if there is a "burr" on the outer edge 32 of the first joining area 31 protruding toward the second joining area 71, and the outer edge 32 of the first joining area 31 is located inside the outer edge 72 of the second joining area 71, the "burr" will be located in a position opposite the second joining area 71.

[0031] Therefore, in this configuration, the "burrs" on the first joining area 31 come into contact with the second joining area 71, causing the first joining area 31 to float above the second joining area 71, making it impossible to bring the first joining area 31 and the second joining area 71 into close contact without any gaps.

[0032] In contrast, in the back frame 1, the outer edge 32 of the first joining area 31 is located outside the outer edge 72 of the second joining area 71, and the outer edge 32 of the second frame 7 is located outside the outer edge 72 of the second joining area 71. The area outside the edge 72 is spaced further from the first frame 3 than the second joining area 71 is.

[0033] For this reason, even if a burr protruding toward the second joining area 71 is present on the outer edge 32 of the first joining area 31, a gap caused by the burr will not occur. Therefore, it is possible to bring the first joining area 31 and the second joining area 71 into close contact with each other without any gaps, and therefore the first joining area 31 and the second joining area 71 can be reliably joined together.

[0034] (Other embodiments) In the above-described embodiment, the first frame 3 and the second frame 7 are joined by laser welding. However, the present disclosure is not limited to this. That is, the present disclosure may also be configured such that the first frame 3 and the second frame 7 are joined by an adhesive, for example.

[0035] 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.

[0036] 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]

[0037] 1... Back frame 2... Seat back 3... First side frame (first frame) 5... Second side frame 7... Upper frame (second frame) 9... Lower frame 31... First joining area 71... Second joint area

Claims

1. A frame for a vehicle seat, the frame comprising a first frame and a second frame joined to the first frame, a first joining area is a planar area of ​​the first frame that includes a joining portion with the second frame and faces the second frame; When a planar area of ​​the second frame including a joint portion with the first frame and facing the first frame is defined as a second joint area, At least a part of an outer edge of the first joining area that overlaps with an outer edge of the first frame is located outside an outer edge of the second joining area, Furthermore, a portion of the second frame that is outside an outer edge of the second joining area is spaced apart from the first frame by more than the second joining area.

2. The seat frame according to claim 1 , wherein the second joint area is formed by a protrusion that protrudes toward the first frame side.

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