Back frame

Abstract

To disclose an example of a back frame capable of using a common support member even when a dimension of the back frame is different for each vehicle type.SOLUTION: In the back frame 1, the upper end 11A in the extending direction of the support wire 11 is located in the coupling part B, and the space A in which the support wire 11 can be disposed is provided on the extension line of the upper end 11A in the extending direction in the coupling part B. As a result, even when the position of the upper end 11A of each support wire 11 in the extending direction is different due to different dimensions of the back frame 1 for each vehicle type, the difference in the position can be absorbed. As a result, even when the size of the back frame 1 is different for each vehicle type, the common support wire 11 can be used.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] As described in Patent Document 1, for example, the back frame of a vehicle seat includes at least a frame-shaped frame and a support member for supporting the back of a seated occupant. reference). [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 back frame that allows a common support member to be used even when the dimensions of the frame differ depending on the vehicle model. [Means for solving the problem]

[0005] It is desirable that the back frame of the vehicle seat have at least one of the following constituent features, for example. That is, the constituent elements are a frame-shaped frame (3, 5, 7, 9), a support wire (11) for supporting the back of a seated person, and a wire holding portion (11B) provided on the frame (3, 5, 7, 9) for holding the support wire (11) at a position offset from the extension direction end (11A) of the support wire (11).

[0006] The extension end (11A) of the support wire (11) is located within the frame (3, 5, 7, 9), and it is further desirable that a space (A) in which the support wire (11) can be placed is provided within the frame (3, 5, 7, 9) on the extension line of the extension end (11A).

[0007] "Inside the frame" refers to a space surrounded on at least two sides by the inner walls of the frame. Preferably, "inside the frame" refers to a space surrounded on the front-rear and upper sides of the seat by the inner walls of the frame.

[0008] This makes it possible to absorb the difference in position of the extension end (11A) of the support wire (11) even if the dimensions of the frame (3, 5, 7, 9) differ for each vehicle model, and ultimately makes it possible to use a common support wire (11) even if the dimensions of the frame (3, 5, 7, 9) differ for each vehicle model.

[0009] The back frame may have the following configuration. That is, the frame includes at least a first side frame (3) extending in the vertical direction, a second side frame (5) disposed at a position offset in the seat width direction from the first side frame (3), the second side frame (5) extending in the vertical direction, and an upper frame (7) extending in the seat width direction and connecting the upper end side of the first side frame (3) and the upper end side of the second side frame (5), the upper frame (7) having an upper wall portion (72) and a lower wall portion (71) opposed to each other while being spaced apart from each other in the vertical direction, and configured to have a substantially C-shaped cross section that is open on one side in the seat front-rear direction, and further, a wire is attached to the lower wall portion (71). It is desirable that the holding portion (11B) is provided and that the upper wall portion (72) is provided with a notched recess (74) that defines the space (A).

[0010] 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]

[0011] [Figure 1] FIG. 2 is a diagram showing a back frame according to the first embodiment. [Figure 2] FIG. 4 is an exploded view of a joint between a first side frame and an upper frame. [Figure 3] 4 is a view showing a joint between a first side frame and an upper frame. FIG. [Figure 4] 10A and 10B are diagrams showing the relationship between the upper frame and the support wire. DETAILED DESCRIPTION OF THE INVENTION

[0012] 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.

[0013] This embodiment is an example in which the back frame according to the present disclosure is applied to a seat (hereinafter referred to as a vehicle seat) mounted on 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.

[0014] 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.

[0015] 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.

[0016] (First embodiment) <1.Back frame overview> 1, the back frame 1 is a substantially rectangular 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.

[0017] The back frame 1 includes at least a first side frame 3, a second side frame 5, an upper frame 7, a lower frame 9, and a support wire 11. The back frame 1 according to this embodiment includes a plurality of support wires 11.

[0018] The first side frame 3 and the second side frame 5 are reinforcing members that extend substantially in the vertical direction. 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.

[0019] The upper frame 7 is a strength member that extends in the seat width direction and connects the upper end of the first side frame 3 to the upper end of the second side frame 5. The lower frame 9 is a strength member that extends in the seat width direction and connects the lower end of the first side frame 3 to the lower end of the second side frame 5.

[0020] In this embodiment, the first side frame 3, the second side frame 5, the upper frame 7, and the lower frame 9 are made of metal and are joined by laser welding. The first side frame 3, the second side frame 5, the upper frame 7, and the lower frame 9 form a rectangular frame.

[0021] The two support wires 11 are members for supporting the back of a seated occupant. The right support wire 11 and the left support wire 11 are configured symmetrically with respect to an imaginary vertical line passing through the center of the seat width direction.

[0022] A lumbar plate 12, shown by a two-dot chain line, is attached to the two support wires 11. That is, the two support wires 11 support the back of the seated occupant via the lumbar plate 12.

[0023] Incidentally, the two support wires 11 according to this embodiment are connected on the side of the lower frame 9. That is, the two support wires 11 according to this embodiment are formed by molding one metal wire into a predetermined shape.

[0024] <2. Structure for fixing the support wire to the frame> 2, the upper end 11A in the extension direction of each support wire 11 is located within the frame. Specifically, the upper end 11A in the extension direction is located within the connection portion between the first side frame 3 and the upper frame 7 (hereinafter simply referred to as "within the connection portion").

[0025] The inside of the connection point refers to a region surrounded on at least three sides by the first side frame 3 and the upper frame 7. As shown in Fig. 3, a space A in which the support wire 11 can be placed is provided within the connection point B on an extension line of the upper end 11A in the extension direction.

[0026] Specifically, within the connection point B, even if the position of the upper end portion 11A in the extension direction is located higher than the position shown in Figure 3, there is no part or component that interferes with the upper end portion 11A in the extension direction.

[0027] That is, the upper frame 7 has a substantially C-shaped cross section that is open on one side in the seat front-rear direction (the rear side in this embodiment), as shown in Fig. 4. Specifically, the upper frame 7 has a lower wall portion 71, an upper wall portion 72, a front wall portion 73, etc.

[0028] The lower wall 71 and the upper wall 72 are opposed walls spaced apart from each other in the vertical direction. The front wall 73 is a wall that closes the front side and connects the front ends of the lower wall 71 and the upper wall 72.

[0029] The lower wall 71, the upper wall 72, and the front wall 73 are integrally formed from a single steel plate by applying plastic processing such as pressing. A wire holding portion 11B is provided at a position shifted downward from the upper end 11A of the support wire 11 in the extension direction.

[0030] The wire holding portion 11B is a grommet-shaped holding member made of resin that holds the support wire 11. Note that the wire holding portion 11B according to this embodiment is attached to the lower wall portion 71. The upper wall portion 72 is provided with a notched recess 74 that forms the space A.

[0031] As shown in FIG. 1, the lower ends of the two support wires 11 are The lower frame 9 has a portion extending in the forward direction.

[0032] 3. Features of the back frame according to this embodiment In the back frame 1 of this embodiment, the upper end 11A of the support wire 11 in the extension direction is located within the connection point B, and a space A in which the support wire 11 can be arranged is provided on the extension line of the upper end 11A in the extension direction within the connection point B.

[0033] This makes it possible to absorb the difference in position even if the position of the upper end 11A in the extension direction of each support wire 11 differs due to the difference in the dimensions of the back frame 1 for each vehicle model. As a result, even if the dimensions of the back frame 1 differ for each vehicle model, it becomes possible to use a common support wire 11, improving robustness.

[0034] (Other embodiments) In the above-described embodiment, the present disclosure is applied to the upper end 11A of the supporting wire 11 in the extension direction. However, the present disclosure is not limited to this. That is, the present disclosure can also be applied to, for example, the lower end of the supporting wire 11 in the extension direction.

[0035] In the above-described embodiment, the support wire 11 extends in the vertical direction. However, the present disclosure is not limited to this. That is, the present disclosure is also applicable to a configuration in which the support wire 11 extends in the seat width direction, for example.

[0036] In the above-described embodiment, the space A is defined by the notch-shaped recess 74. However, the present disclosure is not limited to this. That is, in the present disclosure, for example, the notch-shaped recess 74 may be eliminated, and the seat width direction dimension of the upper wall portion 72 may be smaller than the seat width direction dimension of the lower wall portion 71, thereby defining the space A.

[0037] The upper frame 7 according to the above-described embodiment has a substantially C-shaped cross section that is open on the rear side. However, the present disclosure is not limited to this. That is, the upper frame 7 may have, for example, a substantially C-shaped cross section that is open on the front side, or a closed cross section.

[0038] In the above-described embodiment, the lumbar plate 12 is attached to the two support wires 11. However, the present disclosure is not limited to this. That is, the present disclosure may be configured such that the lumbar plate 12 is not provided.

[0039] 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.

[0040] 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]

[0041] 1... Back frame 2... Seat back 3... First side frame 5... Second side frame 7... Upper frame 9... Lower frame 11... Support wire 11B... Wire holding part 71…Lower wall part 72… Upper wall part 73…Front wall part 74... Recess A... Space

Claims

1. In a back frame of a vehicle seat, A frame-shaped frame frame; a support wire for supporting the back of a seated person; a wire holding portion provided on the frame and holding the support wire at a position shifted from an end of the support wire in an extension direction, The end of the support wire in the extension direction is located within the frame, Furthermore, a back frame has a space within the frame on an extension line of the end in the extension direction, in which the support wire can be arranged.

2. The frame is a first side frame extending in the vertical direction; a second side frame disposed at a position offset in a seat width direction relative to the first side frame and extending in a vertical direction; and The seat includes at least an upper frame extending in the seat width direction and connecting an upper end side of the first side frame and an upper end side of the second side frame, the upper frame has an upper wall portion and a lower wall portion that face each other and are spaced apart from each other in the up-down direction, and has a substantially C-shaped cross section that is open on one side in the seat front-rear direction, The back frame according to claim 1 , further comprising: the wire holding portion provided on the lower wall portion; and a notched recess defining the space provided on the upper wall portion.

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