Vehicle seat cushion frame

Abstract

To disclose an example of a vehicle seat cushion frame that can increase rigidity of a portion including a hinge and a bracket to which the hinge is fixed.SOLUTION: In a cushion frame 1, a bracket part 81 to which a hinge is fixed is fixed by welding to a bridge frame 7 connecting a front frame 5 and an intermediate frame 6 and a second frame 3. Thus, in the cushion frame 1, a frame-shaped frame is formed by the front frame 5, the intermediate frame 6, the bridge frame 7, and the second frame 3, and the bracket part 81 is fixed at least to the bridge frame 7 and the second frame 3. Therefore, rigidity of a part including a hinge 9B and the bracket part 81 can be increased compared to a configuration described in Patent Document 1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a cushion frame that is applied to a vehicle seat in which a front end side of a seat cushion is connected to a vehicle via a hinge. [Background technology]

[0002] A so-called "vehicle seat with a tumble function" has a front end of a seat cushion connected to a vehicle via a hinge, as described in Patent Document 1. Incidentally, the "tumble function" refers to a state in which the seat cushion rotates around the front end so as to bounce up forward when the seat back is in a forward-folded state (see FIG. 1 in Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-51233 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a large forward force acts on a vehicle seat, a large load is generated on the hinge and the bracket to which the hinge is fixed. In contrast, in the invention described in Patent Document 1, the bracket is fixed only to the front pipe of the cushion frame (see FIG. 1 of Patent Document 1).

[0005] In view of the above, the present disclosure discloses an example of a cushion frame for a vehicle seat that can increase the rigidity of a portion including a hinge and a bracket to which the hinge is fixed, compared to the configuration described in Patent Document 1. [Means for solving the problem]

[0006] It is desirable for a cushion frame applied to a vehicle seat in which the front end side of the seat cushion is connected to the vehicle via a hinge (9B) to have at least one of the following configurational features, for example.

[0007] In other words, the constituent elements are a first frame (2) arranged at one end of the seat width direction and extending in the seat front-rear direction, a second frame (3) arranged at the other end of the seat width direction and extending in the seat front-rear direction, a front frame (5) extending in the seat width direction, the front frame (5) connecting a front end side of the first frame (2) and a front end side of the second frame (3), an intermediate frame (6) extending in the seat width direction and connecting the first frame (2) and the second frame (3), the intermediate frame (6) being arranged rearward of the front frame (5), a bridge frame (7) extending in the seat front-rear direction so as to bridge between the front frame (5) and the intermediate frame (6), the bridge frame (7) connecting the front frame (5) and the intermediate frame (6), and a bracket portion (81) to which the hinge (9B) is fixed, the bracket portion (81) being fixed to at least the bridge frame (7) and the second frame (3).

[0008] As a result, in the vehicle seat cushion frame (hereinafter referred to as the cushion frame), a frame-shaped frame is formed by the front frame (5), the intermediate frame (6), the bridge frame (7), and the second frame (3), and the bracket portion (81) is fixed to at least the bridge frame (7) and the second frame (3). Therefore, it is possible to increase the rigidity of the portion including the hinge (9B) and the bracket portion (81) compared to the configuration described in Patent Document 1.

[0009] The cushion frame may have the following configuration, for example. That is, it is preferable that the intermediate frame 6 has arch portions 82 fixed to the second frame 3 at the front and rear sides thereof, and that the arch portions 82 are integrated with the bracket portions 81. This can further improve the rigidity of the cushion frame in the portion including the hinges 9B and the bracket portions 81.

[0010] When either one of the front frame (5) and the intermediate frame (6) is the first connecting frame (5) and the other frame is the second connecting frame (6), it is desirable that one end side in the extension direction of the bridge frame (7) is welded to the first connecting frame (5) in a state where the first connecting frame (5) is sandwiched from above and below, and the other end side in the extension direction of the bridge frame (7) is welded to the second connecting frame (6) on one side in the up and down direction. This can improve the degree of freedom of welding work in the cushion frame.

[0011] The intermediate frame (6) extends in the seat width direction through the second frame (3), and is preferably provided with a third frame (4) to which a portion of the intermediate frame (6) is fixed in the extension direction toward the rear of the seat, and a reinforcing portion (83) welded to a portion of the intermediate frame (6) between the second frame (3) and the third frame (4), the reinforcing portion (83) being integrated with the bracket portion (81).

[0012] This can improve the rigidity of the cushion frame at the portion of the intermediate frame (6) between the second frame (3) and the third frame (4). In the cushion frame, it is preferable that the bracket portion (81), the arch portion (82) and the reinforcing portion (83) are an integrated part made of a single steel plate.

[0013] Incidentally, the symbols in the above parentheses are examples showing the corresponding relationship 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. 2 is a diagram showing a cushion frame according to the first embodiment. [Diagram 2] FIG. 2 is a diagram showing a cushion frame according to the first embodiment. [Diagram 3] FIG. 2 is a diagram showing a cushion frame according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing a second hinge bracket according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The following "embodiment of the invention" shows an example of an embodiment that falls 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 embodiment.

[0016] This embodiment is an example in which a cushion frame for a vehicle seat (hereinafter referred to as a cushion 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 provided in each figure to facilitate understanding of the relationships between the figures and the shapes of components or parts.

[0017] Therefore, the cushion frame is not limited to the directions shown in the drawings. The directions shown in the drawings are the directions when the vehicle seat according to the present embodiment is assembled to a vehicle. The drawings with diagonal lines do not necessarily show cross-sectional views.

[0018] At least one of the members or parts described with a reference number is provided, unless otherwise specified by "one". In other words, unless otherwise specified by "one", the member may be provided in two or more. The cushion frame shown in the present disclosure includes at least one of the components such as the members or parts described with a reference number and the structural parts shown in the drawings.

[0019] (First embodiment) <1. Overview of cushion frame> 1 constitutes the framework of a seat cushion. The seat cushion is a portion for supporting the buttocks of a seated person. A seat back (not shown) is connected to the rear end side of the cushion frame 1.

[0020] The cushion frame 1 includes at least a first frame 2, a second frame 3, a third frame 4, a front frame 5, an intermediate frame 6, a bridge frame 7, a first hinge bracket 10, and a second hinge bracket 8, and the like.

[0021] The first frame 2 to the third frame 4 are strength members extending in the front-rear direction of the seat. These frames 2 to 4 are arranged in the order of the first frame 2, the second frame 3, and the third frame 4 from one end side in the seat width direction (the right end side in this embodiment) to the other end side of the seat (the left end side in this embodiment).

[0022] The front frame 5 is a strength member extending in the seat width direction, and is a member that connects the front end side of the first frame 2 and the front end side of the second frame 3. In this embodiment, the front frame 5 is joined to the first frame 2 and the second frame 3 by welding.

[0023] The intermediate frame 6 is a member that extends in the seat width direction and connects the first frame 2 and the second frame 3, and is a member that is disposed rearward of the front frame 5. The intermediate frame 6 according to this embodiment extends through the second frame 3 to the other end in the seat width direction.

[0024] The front end side of the third frame 4 is fixed to a portion on the leading end side (in this embodiment, the left end side) in the extending direction of the intermediate frame 6. Therefore, the third frame 4 extends from the left end side of the intermediate frame 6 toward the rear of the seat.

[0025] As shown in FIG. 2, the bridge frame 7 is a member that extends in the front-rear direction of the seat so as to bridge between the front frame 5 and the intermediate frame 6, and connects the front frame 5 and the intermediate frame 6.

[0026] As shown in Figures 2 and 3, one end side in the extension direction of the bridge frame 7 (in this embodiment, the front end side) is welded to the round pipe-shaped front frame 5 in a state in which the front frame 5 is sandwiched from above and below.

[0027] The other end side in the extension direction of the bridge frame 7 (the rear end side in this embodiment) is welded to the round pipe-shaped intermediate frame 6 at one side in the up-down direction (the lower side in this embodiment). The symbol W in Figures 2, 3, etc. indicates a weld bead.

[0028] 1, the first hinge bracket 10 and the second hinge bracket 8 are members to which the hinges 9A and 9B are fixed. In other words, the first hinge bracket 10 is a member for connecting the first frame 2 side of the cushion frame 1 and the hinge 9A.

[0029] The second hinge bracket 8 is a member for connecting the second frame 3 side of the cushion frame 1 to the hinge 9B. The hinges 9A and 9B are members for connecting the front end side of the cushion frame 1 to the vehicle so as to be able to swing.

[0030] 2 and 3, the second hinge bracket 8 is fixed to at least the bridge frame 7 and the second frame 3. Note that the second hinge bracket 8 according to this embodiment is fixed to the bridge frame 7 and the second frame 3 by welding.

[0031] <2. Details of the second hinge bracket> 4, the second hinge bracket 8 is configured to include a bracket portion 81, an arch portion 82, and a reinforcing portion 83. Note that the second hinge bracket 8 according to this embodiment is an integrated product in which the bracket portion 81, the arch portion 82, and the reinforcing portion 83 are formed by pressing a single steel plate.

[0032] <Bracket part> The bracket portion 81 is a portion that is fixed (by welding in this embodiment) to the bridge frame 7 and the second frame 3, and has a fixing portion 81A. The fixing portion 81A is a portion to which the hinge 9B is fixed (by a bolt in this embodiment).

[0033] Welding walls 81B, 81C are provided on one end side and the other end side of the fixed portion 81A in the seat width direction. The welding wall 81B is in contact with and welded to the bridge frame 7 from one end side in the seat width direction (the right end side in this embodiment). The welding wall 81C is in contact with and welded to the second frame 3 from the other end side in the seat width direction (the left end side in this embodiment).

[0034] <Arch section> 2, the arch portion 82 is a portion that is fixed to the second frame 3 on the front and rear sides of the intermediate frame 6. Specifically, the portion 82A is welded to the second frame 3 on the front side of the intermediate frame 6. The portion 82B is welded to the second frame 3 on the rear side of the intermediate frame 6. In this embodiment, the portion 82A is integrated with the fixing portion 81A and the welded wall 81B as shown in FIG.

[0035] <Reinforcement section> 2, the reinforcing portion 83 is a portion that is welded to a portion 6A of the intermediate frame 6 between the second frame 3 and the third frame 4. Note that the reinforcing portion 83 according to this embodiment is in contact with the portion 6A from the front side and the rear side, and is welded to the portion 6A in a state in which the portion 6A is sandwiched from the front-rear direction of the seat.

[0036] <3. Features of the cushion frame according to this embodiment> In the cushion frame 1 according to this embodiment, as shown in FIG. 2, the bracket portion 81 to which the hinge 9B is fixed is welded to the bridge frame 7 and the second frame 3 which connect the front frame 5 and the intermediate frame 6.

[0037] As a result, in the cushion frame 1, a frame-shaped frame is formed by the front frame 5, the intermediate frame 6, the bridge frame 7, and the second frame 3, and the bracket portion 81 is fixed to at least the bridge frame 7 and the second frame 3. Therefore, it is possible to increase the rigidity of the portion including the hinge 9B and the bracket portion 81 compared to the configuration described in Patent Document 1.

[0038] The intermediate frame 6 has arch portions 82 fixed to the second frame 3 at the front and rear sides thereof, and the arch portions 82 are integrated with the bracket portions 81. This can further improve the rigidity of the cushion frame 1 in the portion including the hinge 9B and the bracket portions 81.

[0039] The front end side of the bridge frame 7 is welded to the front frame 5 in a state where the front frame 5 is sandwiched from above and below, and the rear end side of the bridge frame 7 is welded to the lower side of the intermediate frame 6 to the intermediate frame 6. This can improve the degree of freedom of welding work in the cushion frame.

[0040] The intermediate frame 6 has a reinforcing portion 83 welded to the portion 6A, and the reinforcing portion 83 is integrated with the bracket portion 81. This can improve the rigidity of the portion of the intermediate frame 6 between the second frame 3 and the third frame 4 in the cushion frame.

[0041] (Other embodiments) In the above-described embodiment, (1) "the front end side of the bridge frame 7 is welded to the front frame 5 while sandwiching the front frame 5 from above and below, and the rear end side of the bridge frame 7 is welded to the intermediate frame 6 below the intermediate frame 6."

[0042] However, the present disclosure is not limited thereto. Specifically, the present disclosure may have any of the following configurations (2) to (4), for example. (2) "The rear end of the bridge frame 7 is welded to the intermediate frame 6 in a state where the intermediate frame 6 is sandwiched from above and below, and the front end of the bridge frame 7 is welded to the front frame 5 below the front frame 5." (3) "The rear end of the bridge frame 7 is welded to the intermediate frame 6 in a state where the intermediate frame 6 is sandwiched from above and below, and the front end of the bridge frame 7 is welded to the front frame 5 above the front frame 5." (4) "The front end of the bridge frame 7 is welded to the front frame 5 in a state where the front frame 5 is sandwiched from above and below, and the rear end of the bridge frame 7 is welded to the upper side of the intermediate frame 6." The second hinge bracket 8 according to the embodiment described above is an integrated product in which the bracket portion 81, the arch portion 82, and the reinforcing portion 83 are press-formed from a single steel plate. However, the present disclosure is not limited to this. That is, the present disclosure may be configured such that, for example, at least one of the arch portion 82 and the reinforcing portion 83 is eliminated.

[0043] The cushion frame 1 according to the above embodiment includes the third frame 4. However, the present disclosure is not limited to this. That is, the present disclosure may be, for example, a cushion frame in which the third frame 4 is eliminated. In this configuration, the portion 6A is not necessary.

[0044] The intermediate frame 6 according to the embodiment described above is configured to extend through the second frame 3 to the other end side in the seat width direction. However, the present disclosure is not limited to this. That is, for example, the portion 6A may be a separate member from the intermediate frame 6.

[0045] In the above 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 disclosure can be applied to, for example, seats used in vehicles such as railroad cars, ships, and aircraft, as well as stationary seats used in theaters, homes, and the like.

[0046] Furthermore, the present disclosure is not limited to the above-mentioned embodiments as long as it is consistent with the gist of the disclosure described in the above-mentioned embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-mentioned embodiments are combined, or a configuration in which any of the components illustrated or the components described with reference numerals in the above-mentioned embodiments are eliminated. [Explanation of symbols]

[0047] 1. Cushion frame 2... First frame 3. Second frame 4. Third frame 5… Front frame 6… Intermediate frame 7… Bridge frame 8… 2nd hinge bracket 81… Bracket part 81A…Fixed part 81B… Welded wall 81C… Welded wall 82… Arch section 83… Reinforcement 9A, 9B... Hinge

Claims

1. A cushion frame applied to a vehicle seat in which a front end side of a seat cushion is connected to a vehicle via a hinge, a first frame disposed at one end in a seat width direction and extending in a seat front-rear direction; a second frame disposed on the other end side in the seat width direction and extending in the seat front-rear direction; a front frame extending in a seat width direction and connecting a front end side of the first frame and a front end side of the second frame; an intermediate frame extending in a seat width direction and connecting the first frame and the second frame, the intermediate frame being disposed rearward of the front frame; a bridge frame extending in a seat front-rear direction so as to bridge the front frame and the intermediate frame, the bridge frame connecting the front frame and the intermediate frame; a bracket portion to which the hinge is fixed, the bracket portion being fixed to at least the bridge frame and the second frame; A cushion frame for a vehicle seat comprising:

2. An arch portion fixed to the second frame, the arch portion being fixed to the second frame at a front side and a rear side of the intermediate frame, 2. The cushion frame for a vehicle seat according to claim 1, wherein the arch portion is integrated with the bracket portion.

3. When one of the front frame and the intermediate frame is defined as a first connecting frame and the other frame is defined as a second connecting frame, One end side of the bridge frame in the extension direction is welded to the first connection frame in a state in which the first connection frame is sandwiched from above and below, The other end side of the bridge frame in the extension direction is welded to the second connection frame on one side in the up-down direction.

3. The vehicle seat cushion frame according to claim 2.

4. The intermediate frame extends in a seat width direction through the second frame, a third frame to which a tip end portion of the intermediate frame is fixed and which extends from the tip end portion toward the rear of the seat; a reinforcing portion welded to a portion of the intermediate frame between the second frame and the third frame, the reinforcing portion being integrated with the bracket portion; The cushion frame for a vehicle seat according to claim 3 , comprising:

5. 5. The cushion frame for a vehicle seat according to claim 4, wherein the bracket portion, the arch portion and the reinforcing portion are an integral part made of a single steel plate.

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