Vehicle seat frame and vehicle seat

Abstract

To provide a vehicle seat frame and a vehicle seat in which rigidity of a cushion side frame is improved.SOLUTION: Due to the side frame 18 being structured by the outer side frame 20 and the inner side frame 22, the closed cross-section portion 34 being structured by the outer side frame 20 and the inner side frame 22, and the collar spacer 48 being disposed within the closed cross-section portion 34, deformation of the side frame 18 can be suppressed, and the rigidity of the side frame 18 itself can be improved. As a result, even if the hinge bracket 56 of the recliner mechanism 16 attempts to deform toward the seat width direction outer side, deformation of the side frame 18 can be suppressed.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a vehicle seat frame and a vehicle seat. [Background technology]

[0002] Patent Document 1 below discloses technology related to a fastening structure for a seat frame. In this prior art, the lower part of a lower bracket is overlapped from the outside in the seat width direction with the rear part of a cushion side frame that constitutes both sides of the seat cushion frame in the seat width direction, and they are fastened and fixed to each other at two fastening parts aligned in the seat front-rear direction. Furthermore, in the prior art, a hook part is provided on either the rear part of the cushion side frame or the lower part of the lower bracket, and this hook part is adapted to engage with the other hook part, ensuring fastening strength between the rear part of the cushion side frame and the lower part of the lower bracket. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-79919 Summary of the Invention [Problem to be solved by the invention]

[0004] The seat cushion frame is connected to a seat back frame, and the seat back frame is rotatable relative to the seat cushion frame via a recliner mechanism. The recliner mechanism is provided with a hinge bracket, which is attached to the cushion side frame.

[0005] In a strength test, if a load is input to the recliner mechanism and the hinge bracket is deformed outward in the seat width direction, the cushion side frame may be pulled by the hinge bracket and deformed.

[0006] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a vehicle seat frame and a vehicle seat in which the rigidity of the cushion side frame is improved. [Means for solving the problem]

[0007] The vehicle seat frame according to the first aspect includes a seat cushion frame that serves as the skeleton of the seat cushion on which an occupant sits, and cushion side frames that form part of the seat cushion frame and extend in the front-to-rear direction of the seat on both outer sides in the seat width direction include an outer frame that forms the outer side in the seat width direction, an inner frame that forms the inner side in the seat width direction and forms a closed cross-sectional portion together with the outer frame, and a collar spacer that is fixed to the outer frame and the inner frame and is arranged within the closed cross-sectional portion.

[0008] The vehicle seat frame according to the first aspect includes a seat cushion frame that serves as a framework for a seat cushion on which an occupant sits. Cushion side frames that form part of the seat cushion frame and extend in the front-rear direction of the seat on both outer sides in the seat width direction are configured to include an outer frame, an inner frame, and a collar spacer.

[0009] The outer frame defines the outer side in the seat width direction, and the inner frame defines the inner side in the seat width direction, and together with the outer frame, define a closed cross-sectional portion. The collar spacer is fixed to the outer frame and the inner frame and is arranged within the closed cross-sectional portion.

[0010] In this way, the cushion side frame is composed of an outer frame and an inner frame, and by forming a closed cross-sectional portion using the outer frame and the inner frame, it is possible to improve the rigidity of the cushion side frame itself compared to when the cushion side frame is composed of a single frame.

[0011] Furthermore, by disposing the collar spacer within the closed cross-section of the cushion side frame, deformation of the cushion side frame can be suppressed and the rigidity of the cushion side frame itself can be further improved, which makes it possible to suppress deformation of the cushion side frame even if the hinge bracket of the recliner mechanism tries to deform outward in the seat width direction.

[0012] The vehicle seat frame of the second aspect is the vehicle seat frame of the first aspect, wherein one axial end of the collar spacer is welded to either the outer frame or the inner frame, and the other axial end is pressed into a through hole formed in the other frame.

[0013] In the vehicle seat frame according to the second aspect, one axial end of the collar spacer is welded to the outer frame (or inner frame), thereby fixing the collar spacer to the outer frame (or inner frame), while the other axial end of the collar spacer is press-fitted into a through-hole formed in the inner frame (or outer frame).

[0014] That is, in this aspect, the cushion side frame is formed by press-fitting the other axial end of the collar spacer into a through-hole formed in the inner frame (or outer frame) while one axial end of the collar spacer is welded and fixed to the outer frame (or inner frame). Therefore, the cushion side frame is easier to assemble than, for example, a case in which both axial ends of the collar spacer are welded.

[0015] The vehicle seat frame of the third aspect is the vehicle seat frame of the first or second aspect, wherein the collar spacer includes a collar body and a step portion provided at at least one axial end of the collar body, formed to be smaller than the outer dimensions of the collar body, and pressed into a through hole formed in at least one of the outer frame and the inner frame.

[0016] In a vehicle seat frame according to a third aspect, the collar spacer includes a collar body and a step portion. The step portion is formed on at least one axial end of the collar body. The step portion is formed to be smaller than the outer dimensions of the collar body and is configured to be press-fitted into a through-hole formed in at least one of the outer frame and the inner frame.

[0017] That is, in this aspect, the cushion side frame is formed by press-fitting a through-hole formed in at least one of the outer frame and the inner frame into a step formed in at least one axial end of the collar spacer. Therefore, the cushion side frame is easier to assemble than, for example, a case in which both axial ends of the collar spacer are welded together.

[0018] A vehicle seat frame according to a fourth aspect is a vehicle seat frame according to any one of the first to third aspects, wherein a female thread portion is formed in the collar spacer and a fastening bolt is fastened to the female thread portion.

[0019] In the vehicle seat frame according to the fourth aspect, a female thread portion is formed in the collar spacer, and by fastening a fastening bolt to the female thread portion, it is possible to improve the fastening strength at the fastening portion compared to when the collar spacer is not present.

[0020] The vehicle seat according to the fifth aspect includes a seat cushion on which an occupant is seated, the seat cushion having a skeleton formed from a seat cushion frame according to any one of the first to fourth aspects, and a seat back having a skeleton formed from a seat back frame that supports the upper body of the occupant seated on the seat cushion and is connected to the rear end of the seat cushion frame via a recliner mechanism.

[0021] A vehicle seat according to a fifth aspect includes a seat cushion on which an occupant sits and a seat back that supports the upper body of the occupant seated on the seat cushion. The seat cushion has a seat cushion frame as a framework, and a seat back frame is connected to the rear end of the seat cushion frame via a recliner mechanism.

[0022] In this aspect, it is possible to improve the rigidity of the cushion side frame itself, so that deformation of the cushion side frame can be suppressed even if the hinge bracket of the recliner mechanism attempts to deform outward in the seat width direction. [Effects of the Invention]

[0023] As described above, the vehicle seat frame and vehicle seat according to the present invention can use cushion side frames with improved rigidity. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a side view showing a vehicle seat according to an embodiment of the present invention; [Figure 2] 2 is a perspective view of the cushion side frame according to the present embodiment, as viewed from the inside in the seat width direction and from the rear side of the seat. FIG. [Figure 3] FIG. 2 is an exploded perspective view showing the configuration of a cushion side frame according to the present embodiment. [Figure 4] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 5] FIG. 5 is a cross-sectional view corresponding to FIG. 4, illustrating the operation of the cushion side frame according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, a vehicle seat frame 11 applied to a vehicle seat 10 according to an embodiment of the present invention will be described with reference to the drawings. Note that arrows FR, UP, and OUT shown as appropriate in each drawing indicate the forward direction, upward direction, and outward direction in the vehicle width direction of the vehicle seat 10, respectively. Also, in each drawing, some reference numerals may be omitted in order to make the drawings easier to understand.

[0026] (Configuration of vehicle seat frame) 1, a vehicle seat 10 according to this embodiment includes a seat cushion frame 13 that serves as the framework of a seat cushion 12 on which an occupant sits. A lower end of a seat back frame 15 that serves as the framework of a seat back 14 that supports the upper body of the occupant seated on the seat cushion 12 is connected to the rear end of the seat cushion frame 13.

[0027] A recliner mechanism 16 is provided at the rear end of the seat cushion frame 13, and the seat back frame 15 is able to swing relative to the seat cushion frame 13 in the front-to-rear direction of the seat via the recliner mechanism 16.

[0028] Here, the seat cushion frame 13 is composed of a pair of side frames (cushion side frames) 18 extending in the front-to-rear direction of the seat at both ends in the seat width direction, and a front frame extending along the seat width direction at the front ends of the pair of side frames 18 and a rear frame extending along the seat width direction at the rear ends of the pair of side frames 18, although not shown.

[0029] 2 and 3, in this embodiment, the side frame 18 includes an outer frame 20 that forms the outer side in the seat width direction, and an inner frame 22 that forms the inner side in the seat width direction. The outer frame 20 includes a main frame 24 that is shaped like a flat plate and extends in the front-to-rear and up-down directions of the seat, and a flange portion 26 extends from the upper end of the main frame 24 toward the inner side in the seat width direction (toward the inner frame 22).

[0030] The flange portion 26 is configured to include a front flange portion 26A provided on the front portion 20A of the outer frame 20 and a rear flange portion 26B provided on the rear portion 20B of the outer frame 20, and the front flange portion 26A extends longer in the seat width direction than the rear flange portion 26B.

[0031] On the other hand, the inner frame 22 is configured to include a main frame 28 that is shaped like a flat plate and extends in the front-to-rear and up-down directions of the seat, facing the outer frame 20. A flange portion 30 extends from the upper end of the main frame 28 toward the outside in the seat width direction (toward the outer frame 20).

[0032] The flange portion 30 is configured to include a front flange portion 30A provided on the front portion 22A of the inner frame 22 and a rear flange portion 30B provided on the rear portion 22B of the inner frame 22. A recessed portion 32 recessed toward the lower side of the seat is provided on the main body frame 28 side of the rear flange portion 30B, and this recessed portion 32 prevents interference with the rear frame provided at the rear end of the side frame 18.

[0033] The flange portion 30 of the inner frame 22 is welded to the flange portion 26 of the outer frame 20 in a state where they overlap from above, and a closed cross-sectional portion 34 (see FIG. 5) is formed between the outer frame 20 and the inner frame 22. Note that FIG. 5 is a cross-sectional view taken along line AA shown in FIG. 1.

[0034] The side frames 18 may also be provided with lower frames 36 that form the lower ends of the side frames 18. The lower frames 36 are configured to include a main frame 38 that is shaped like a flat plate and extends in the seat front-rear direction and the seat width direction. Upper flanges 40, 42 extend upward from both ends of the main frame 24 in the seat width direction, and the upper flange 40 is welded to the lower end of the outer frame 20, and the upper flange 42 is welded to the lower end of the inner frame 22.

[0035] Meanwhile, through holes 44, 46 are formed in the outer frame 20 and the inner frame 22 at positions corresponding to each other, and a cylindrical collar spacer 48 is fixed between the outer frame 20 and the inner frame 22 so as to communicate with the through holes 44 and 46. The distance between the outer frame 20 and the inner frame 22 varies depending on the position of the side frame 18 in the seat fore-and-aft direction, and the length of the collar spacer 48 changes depending on this distance.

[0036] 4, the collar spacer 48 includes a collar body 50 and a step portion 52. Note that FIG. 4 shows the state before fastening bolts 54 and the like, which will be described later in FIG. 5, are fastened.

[0037] The collar body 50 is cylindrical, and has a female thread 50A formed therein. As shown in FIG. 5, a fastening bolt 54 is fastened to the female thread 50A. The fastening bolt 54 fastens a hinge bracket 56, which constitutes part of the recliner mechanism 16, to the side frame 18. Note that the fastening bolts 58 other than the fastening bolt 54 fasten the outer frame 20 and the inner frame 22 via the collar spacer 48 with a gap between them.

[0038] 4, a step portion 52 is formed at one axial end portion of the collar body 50. The inner diameter dimension (D1) of the step portion 52 is formed to be smaller than the outer diameter (outer shape) dimension (D2) of the collar body 50, and is capable of being press-fitted into the through hole 44 formed in the outer frame 20.

[0039] (Action and effect of vehicle seat frame) 2 and 3, in this embodiment, the side frame 18 is configured to include an outer frame 20, an inner frame 22, and a collar spacer 48. The outer frame 20 forms the outer side in the seat width direction, and the inner frame 22 forms the inner side in the seat width direction, and together with the outer frame 20, forms a closed cross-sectional portion 34.

[0040] Additionally, the collar spacer 48 is fixed to the outer frame 20 and the inner frame 22 and is arranged to be disposed within the closed cross-sectional portion 34. In this way, by forming the side frame 18 from the outer frame 20 and the inner frame 22 and forming the closed cross-sectional portion 34 with the outer frame 20 and the inner frame 22, it is possible to improve the rigidity of the side frame 18 itself compared to when the side frame 18 is formed from a single frame.

[0041] Furthermore, by disposing the collar spacer 48 within the closed cross-sectional portion 34 of the side frame 18, it is possible to suppress deformation of the side frame 18 and further improve the rigidity of the side frame 18 itself. As a result, it is possible to suppress deformation of the side frame 18 even if the hinge bracket 56 of the recliner mechanism 16 attempts to deform outward in the seat width direction.

[0042] In this embodiment, the collar spacer 48 is cylindrical, and one axial end of the collar spacer 48 is welded to the inner frame 22. In this way, the collar spacer 48 is fixed to the inner frame 22. Meanwhile, the other axial end of the collar spacer 48 is formed with a step 52 that is press-fit into the through hole 44 formed in the outer frame 20.

[0043] For this reason, in this embodiment, the side frame 18 is formed by press-fitting the step 52 formed on the other axial end of the collar spacer 48 into the through hole 44 formed in the outer frame 20, with one axial end of the collar spacer 48 being welded and fixed to the inner frame 22. In other words, in this embodiment, the side frame 18 is easier to assemble than, for example, a comparative example in which both axial ends of the collar spacer 48 are welded.

[0044] In this embodiment, a female thread portion 50A is formed in the collar spacer 48, and the fastening bolt 54 is fastened to the female thread portion 50A. As a result, in this embodiment, the fastening strength of the fastening portion 60 can be improved compared to when the collar spacer 48 is not present.

[0045] (Supplementary information about this embodiment) In the above embodiment, the collar spacer 48 has the step 52 formed at one end in the axial direction of the collar body 50, but this is not limited to this. For example, although not shown, steps may be formed at both axial ends of the collar body 50. In this case, the step 52 formed on the collar body 50 is press-fitted into the through-hole 46 formed in the inner frame 22 and the through-hole 44 formed in the outer frame 20, respectively.

[0046] That is, in this embodiment, the side frames 18 are formed by press-fitting the through holes 44 formed in the outer frame 20 and the inner frame 22 into the step portions 52 formed at both axial ends of the collar spacer 48. Therefore, the side frames 18 are easier to assemble than, for example, when both axial ends of the collar spacer 48 are welded together.

[0047] Furthermore, the through holes 44, 46 may be formed by burring. When the outer frame 20 and the inner frame 22 are thin frames, burring can improve the rigidity of the frame around the through holes, thereby improving the fastening strength of the bolts.

[0048] 3, the collar body 50 is cylindrical in shape, but the shape of the collar body 50 is not limited to a cylindrical shape. For example, the collar body 50 may be a square tube.

[0049] Although the present invention has been described above by way of examples, these examples are merely examples and can be modified in various ways without departing from the spirit of the invention. It goes without saying that the scope of the present invention is not limited to these examples. [Explanation of symbols]

[0050] 10 Vehicle seats 11. Vehicle seat frame 12 seat cushions 13 Seat cushion frame 14 Seat back 15 Seat back frame 16 Reclining mechanism 18 Side frame (cushion side frame) 20 outer frame 22 Inner frame 34 Closed section 44 through holes 46 Through hole 48 Color Spacer 50 Color body (color spacer) 50A female thread 52 Stepped part (color spacer) 54 Fastening bolt 58 Fastening bolt

Claims

1. It is equipped with a seat cushion frame, which is the framework of the seat cushion on which the occupant sits. The cushion side frames, which form part of the seat cushion frame and extend in the front-rear direction of the seat on both outer sides in the seat width direction, an outer frame that forms the outer side of the seat in the width direction; an inner frame that forms an inner side in the seat width direction and that forms a closed cross-sectional portion together with the outer frame; a collar spacer fixed to the outer frame and the inner frame and disposed within the closed cross-sectional portion; A vehicle seat frame comprising:

2. 2. The vehicle seat frame according to claim 1, wherein one axial end of the collar spacer is welded to one of the outer frame and the inner frame, and the other axial end is press-fitted into a through hole formed in the other frame.

3. The color spacer is Color body and a step portion provided at least at one end in the axial direction of the collar body, formed to be smaller than an outer dimension of the collar body, and press-fitted into a through hole formed in at least one of the outer frame and the inner frame; The vehicle seat frame according to claim 1, comprising:

4. 2. The vehicle seat frame according to claim 1, wherein the collar spacer is formed with a female thread portion, and a fastening bolt is fastened to the female thread portion.

5. a seat cushion on which an occupant is seated and which has a skeleton of the seat cushion frame according to any one of claims 1 to 4; a seat back having a frame including a seat back frame that supports an upper body of an occupant seated on the seat cushion and is connected to a rear end of the seat cushion frame via a recliner mechanism; A vehicle seat comprising:

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