Seat frame, seat for mobile device and mobile device

Abstract

To provide a seat frame which can enhance resistance against a load applied to a side frame in a front-and-rear direction by reinforcements, even when the side frame is made of a resin.SOLUTION: There is provided a seat frame for a movable body in which reinforcements are mounted on a resin side frame included in a seat back frame, wherein the reinforcement has a plate-shaped body part, and an extension part which extends to the upper part of the side frame from the body part, and has such a shape as to be made narrower toward the upper part, and the plurality of reinforcements are arranged at the same position of the side frame so that the extension parts extending upward partially overlap each other.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a seat frame, a seat for a moving body, and a moving body.

Background Art

[0002] A seat for a moving body such as an automobile has a structure in which a seat back and a seat cushion are respectively attached to a seat back frame on the back surface of the seat frame and a cushion frame on the seat surface. The seat back frame has a structure in which side frames provided on both left and right sides are connected by an upper frame at the upper end portion.

[0003] In order to suppress deformation of the seat frame due to the load applied to the seat, a configuration in which reinforcement is arranged on the side frame is known (for example, Patent Document 1 and Patent Document 2). Patent Documents 1 and 2 describe a reinforcement for a side frame having a flat plate-like main body portion arranged on the side surface of the side frame and a flange portion bent so as to be arranged along the entire surface of the side frame.

[0004] Conventionally, the side frame has been made of a metal such as steel. On the other hand, in recent years, resin side frames for the purpose of weight reduction of moving bodies have also been studied (for example, Patent Document 3 and Patent Document 4). Since the resin has lower strength than the metal, when adopting a resin side frame, improvement of impact resistance is required. In Patent Documents 3 and 4, the bracket for joining the side frame to another member is made easier to break, and the energy at the time of collision is absorbed by the bracket.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

[0006] As mentioned above, the resin side frame needs to be strengthened. In contrast, the configuration described in Patent Documents 3 and 4, which absorbs collision energy by the failure of brackets, can suppress deformation of the side frame, but on the other hand, the failure of the brackets causes the seat itself to deform, so it cannot be said to be a safe configuration for the occupant.

[0007] In contrast, if the deformation of the side frame is suppressed by the arrangement of the reinforcement, there is no need to make the bracket more prone to failure. However, if a flange portion is provided on the reinforcement as described in Patent Documents 1 and 2 in order to increase resistance to loads applied to the side frame in the front-rear direction, the load is applied from the flange portion to the side frame in the front-rear direction, which actually concentrates stress on the side frame and makes it more prone to deformation.

[0008] The present invention has been made in view of these problems, and aims to provide a seat frame that can increase resistance to loads applied to the side frame in the front-rear direction by reinforcement, even when the side frame is made of resin, a seat for a mobile body having the seat for a mobile body, and a mobile body having the seat for a mobile body. [Means for solving the problem]

[0009] One aspect of the present invention for solving the above problems relates to the sheet frame bodies described below [1] to [7]. [1] A seat frame for a mobile vehicle, wherein a reinforcement is attached to a resin side frame of the seat back frame, The aforementioned reinforcement is, A flat main body, It has an extension portion that extends from the main body portion toward the upper part of the side frame and has a shape that becomes narrower toward the upper part, Multiple reinforcements are arranged at the same position on the side frame such that their upwardly extending portions partially overlap. Seat frame. [2] The plurality of reinforcements are arranged such that the lower ends of the extensions overlap, but the upper ends of the extensions do not overlap. [1] The seat frame described above. [3] Of the plurality of reinforcements, the reinforcement that is positioned in contact with the side frame has a pair of flange portions on its main body that sandwich the side frame from the front and rear directions, The seat frame described in [1] or [2]. [4] The plurality of reinforcements each have the flange portion and are arranged so that the flange portions face opposite each other. [3] The seat frame described above. [5] The plurality of reinforcements are The extension portion is, A height side positioned along one of the front or rear ends of the aforementioned side frame, The hypotenuse extending from the other end of the side frame toward the upper end of the height side, It has a right-angled triangular shape with a base which is the connection part with the main body, The extension portion has a reinforcement such that the height side has a flange portion. A seat frame as described in any of [1] to [4]. [6] The plurality of reinforcements are all two reinforcements in which the extending portion has the right-angled triangle shape and the flange portion, The two reinforcements are One of the height sides of the reinforcement is arranged along one of the front and rear ends of the side frame, And the height side of the other reinforcement is arranged along the other of the front and rear ends of the side frame, The seat frame according to [5]. [7] The side frame is made of resin, The seat frame according to any one of [1] to [6].

[0010] Another aspect of the present invention for solving the above problems relates to a seat for a moving body and a moving body described in [8] to

[10] below. [8] A seat for a moving body having the seat frame according to any one of [1] to [7]. [9] A moving body having the seat for a moving body according to [8].

[10] The moving body according to [9], which is an automobile.

Effect of the Invention

[0011] According to the present invention, even when the side frame is made of resin, a seat frame capable of enhancing the resistance to a load applied in the front-rear direction to the side frame by the reinforcement, a seat for a moving body having the seat frame, and a moving body having the seat for a moving body are provided.

Brief Description of the Drawings

[0012] [Figure 1] FIG. 1 is a schematic perspective view showing a general overall configuration of a seat frame of a seat for a moving body. [Figure 2] FIG. 2 is a schematic perspective view showing an overall configuration of a seat frame of a seat for a moving body according to an embodiment of the present invention. [Figure 3]FIG. 3A and FIG. 3B are schematic diagrams showing the configuration of the reinforcement. [Figure 4] FIG. 4 is a schematic diagram showing the shape of the reinforcement in plan view. [Figure 5] FIG. 5 is a schematic diagram showing the configuration when two reinforcements 230a and reinforcement 230b are arranged in contact with each other. [Figure 6] FIG. 6 is a schematic diagram showing a moving body having a seat for a moving body.

MODE FOR CARRYING OUT THE INVENTION

[0013] [First Embodiment] FIG. 1 is a schematic perspective view showing a general overall configuration of a seat frame of a seat for a moving body. The seat frame 100 has a seat back frame 110 on which a seat back is arranged and a cushion frame 120 on which a seat cushion is arranged. In this specification, the forward direction of the moving body is the X direction, the right direction is the Y direction, and the upward direction is the Z direction.

[0014] The seat back frame 110 has a pair of side frames 112 extending in the vertical direction arranged at both left and right ends, and an upper frame 114 connecting the upper end portions of these side frames. Further, the seat back frame 110 has one or a plurality (two in FIG. 1) of width direction springs 118 arranged so as to span the pair of side frames 112 at a height between the cushion frame 120 and the upper frame 114.

[0015] Each of the pair of side frames 112 has a reinforcement 130 that extends upward along the side frame from the connection point with the cushion claim 120 at its lower end. Each of these reinforcements 130 has a flat main body portion 132 and a front-to-back symmetrical, substantially trapezoidal extension portion 134 that extends from the main body portion 132 upward toward the side frame 112, and only one reinforcement 130 is provided on each side frame 112.

[0016] The cushion frame 120 has a pair of side frames 122 that extend in the front-to-back direction and are located at both the left and right ends, and a front frame 124 and a back frame 126 that connect these side frames at the front and rear, respectively. The cushion frame 120 also has one or more (four in Figure 1) front-to-back springs 128 that are positioned to bridge the front frame 120 and the upper frame 114 between the pair of side frames 122.

[0017] Furthermore, the cushion frame 120 can be positioned in the front-to-back direction by a pair of left and right sliding rails 140.

[0018] In this embodiment, the seat back frame 110 is made of resin (particularly fiber-reinforced resin), and the cushion frame 120 is made of metal (steel).

[0019] Figure 2 is a schematic perspective view showing the overall configuration of a sheet frame 200 for a mobile seat according to one embodiment of the present invention. Components common to the general sheet frame 100 shown in Figure 1 are denoted by the same reference numerals, and redundant explanations are omitted.

[0020] In this embodiment, each of the pair of side frames 112 of the seat back frame 110 has a reinforcement 230 that extends upward along the respective side frame from the connection portion with the cushion claim 120, which is the lower end of the side frame. Each reinforcement 230 has the same shape and configuration. Each reinforcement 230 has a configuration in which two reinforcements 230a and 230b of the same shape are arranged back to back and in contact with each other.

[0021] Figure 3A is a schematic diagram showing the configuration of reinforcement 230a, Figure 3B is a schematic diagram showing the configuration of reinforcement 230b, and Figure 4 is a schematic diagram showing the plan view shapes of reinforcement 230a and reinforcement 230b. Reinforcement 230a and reinforcement 230b have a flat main body portion 232 and an extension portion 234 that extends from the main body portion 232 toward the upward of the side frame 112.

[0022] The main body 232 has a shape that is substantially the same as the lower end region of the side frame 112 when viewed from above (in the Y direction). The front and rear ends of the main body 232 (ends in the X direction and the opposite direction) are positioned in close contact with the lower end region of the side frame 112, so as to align with the front and rear ends of the side frame 112 (ends in the X direction and the opposite direction).

[0023] The extension portion 234 has a height side 2342 which extends upward from one of the front and rear ends of the main body portion 232, a hypotenuse 2344 which connects the upper end of the other front and rear end of the main body portion 232 to the upper end of the height side 2342, and a base side 2346 which is the connection portion between the extension portion 234 and the main body portion 232, and is a right-angled triangle shape in which the angle between the height side 2342 and the base side 2346 is a right angle.

[0024] Furthermore, flange portions 236 are formed at both the front and rear ends of the main body portion 232, extending perpendicularly from the main body portion 232 in one direction (the Y direction and the opposite direction). Both flange portions 236 are formed from the lower end to the upper end of the main body portion 232. At one of the front and rear ends of the main body portion 232, the flange portion 236 is formed along the end of the extension portion 234 (height side 2342) up to the upper end of the extension portion 234.

[0025] Figure 5 is a schematic diagram showing the configuration when two reinforcements 230a and 230b are placed in contact with each other.

[0026] The two reinforcements 230a and 230b are identical in shape, with their entire bodies 234 overlapping and in contact with each other, and their flange portions 236 facing opposite directions (the Y direction and the opposite direction). In this configuration, the height side 2342 of reinforcement 230a, which is positioned outward relative to the side frame 112, is aligned along the rear end of the side frame 112, while the height side 2342 of reinforcement 230b, which is positioned inward and in contact with the side frame 112, is aligned along the front end of the side frame 112 (see Figure 2). As a result, the extensions 234 of each reinforcement do not completely overlap, creating a partially overlapping region 234-1 in the center and a non-overlapping region 234-2 on each of their height sides 2342. In other words, the extensions 234 of each reinforcement are arranged so that their lower ends (base 2346) overlap, but their upper ends (upper ends of the height side 2342) do not overlap.

[0027] Furthermore, the flange portions 236 at both the front and rear ends of the reinforcement 230a, which is positioned outward relative to the side frame 112, are positioned to protrude away from the side frame 112. The flange portions 236 at both the front and rear ends of the reinforcement 230b, which is positioned inward relative to the side frame 112, are positioned to sandwich the side frame 112 from the front and rear directions (see Figure 2).

[0028] The two reinforcements 230a and 230b each have two insertion holes 239a and 239b at the same location, and fastening members (bolts) are inserted through these insertion holes to fasten them to the side frame 112. In addition, a hinge member (not shown in Figure 5) for rotatably assembling the side frame 112 to the cushion frame 120, or a bracket (not shown in Figure 5) for assembling the side frame 112 without rotation, is assembled using the same fastening member in the lower insertion hole 239b.

[0029] According to the configuration of this embodiment, two reinforcements, each having an extension that narrows upwards, partially overlap, while other parts (especially the upper ends) do not overlap. These reinforcements distribute and support stress in the front-rear direction, thereby increasing the resistance of the resin side frame to loads applied in the front-rear direction.

[0030] Therefore, even if the flange portions 236 at both the front and rear ends of the reinforcement 230b, which is positioned inside the side frame 112, clamp the side frame 112 from the front and rear directions, deformation of the side frame 112 is less likely to occur due to excessive load being applied to the side frame from the flange portions 236 in the front and rear directions. This allows the impact resistance improvement effect of the flange portions 236 to be achieved more efficiently. At this time, since the extension portion 234 has the right-angled triangular shape described above, the clamping length by the flange portions 236 can be increased, and deformation of the side frame 112 can be suppressed more effectively.

[0031] Furthermore, the flange portions 236 of the reinforcement 230b are positioned so that they face opposite each other. This improves the second moment of area of ​​the entire reinforcement 230 in the front-rear direction, thereby enhancing the strength-improving effect of the side frame 112.

[0032] Furthermore, from the viewpoint of achieving the above effect more effectively, it is preferable that the area of ​​the region where the extensions 234 do not overlap is larger than the area of ​​the region where the extensions 234 overlap. In this case, for example, the length of the height side 2342 of the right-angled triangular extension 234 can be made longer than the length of the base side 2346.

[0033] Figure 6 is a schematic diagram showing a mobile body 400 having a mobile seat 410 with a seat back and seat cushion attached to the seat frame 200 described above. This mobile body 400 is lightweight because the side frames 122 of the seat frame 200 are made of resin, while the strength of the side frames 122 is also high, resulting in high occupant safety.

[0034] [Other embodiments] It should be noted that the embodiments described above are merely illustrative embodiments of the present invention, and it goes without saying that the present invention can take various modified forms within the scope of the technical concept disclosed herein.

[0035] For example, in the embodiment described above, the two reinforcements 230a and 230b were assumed to have the same shape, but they may have different shapes, and the extensions 234 may be arranged so that they partially overlap but not in other parts. Furthermore, the shape of the extension 234 is not limited to the right-angled triangular shape described above.

[0036] Furthermore, in the above-described embodiment, two reinforcements 230a and reinforcement 230b are positioned at the same location, but three or more reinforcements may be arranged so that their extended portions partially overlap but do not overlap in other parts.

[0037] Furthermore, although the above-described embodiment states that the reinforcement 230 is positioned at the lower end of the side frame 112, the position of the reinforcement 230 is not limited to this, and it can be positioned at any position, such as the upper end or the intermediate part between the lower and upper ends. In addition, reinforcements may be positioned at multiple different locations on the side frame 112, such as at the lower end and upper end, at the lower end and the intermediate part, or multiple reinforcements in the intermediate part. In this case, all of the multiple reinforcements may be the reinforcement 230 made by combining the multiple pieces described above, or the reinforcement 230 described above may be combined with reinforcements of other configurations. It goes without saying that the upper frame 114 and cushion frame may also have reinforcements.

[0038] Furthermore, in the above-described configuration, the main body portions 232 of reinforcement 230a and reinforcement 230b are assumed to have substantially the same shape as the lower end region of the side frame 112. However, it goes without saying that the shape of the main body portion 232 is not limited to this.

[0039] Furthermore, the seat having the aforementioned seat frame 200 may be a foldable side seat or the like.

[0040] Furthermore, although the seat back frame 110 is made of resin in the embodiment described above, a similar reinforcement 230 may be placed on a metal seat back frame.

[0041] Furthermore, seats having the aforementioned seat frame 200 may be used not only in automobiles, but also in all kinds of moving objects such as flying cars, buses, trucks, trains, airplanes, helicopters, and ships. [Industrial applicability]

[0042] The sheet frame according to the present invention can increase the strength of a sheet for a mobile device. [Explanation of Symbols]

[0043] 100 Seat Frame 110 Seat Back Frame 112 Side Frame 114 Upper Frame 118 Width-direction spring 120 Cushion Frame 122 Side Frame 124 Front Frame 126 Backframe 128 Front-rear spring 130 Reinforcement 132 Main body 134 Extension 140 Slide Rail 200 Seat Frame 230, 230a, 230b reinforcement 232 Main body 234 Extension 2342 Height side 2344 Hypotenuse 2346 Bottom 234-1 Partially overlapping regions 234-2 Non-overlapping regions 236 Flange section 239a, 239b Insertion holes 400 Mobile Units 410 Mobile seat

Claims

1. A seat frame for a mobile vehicle, in which a reinforcement is attached to the resin side frame of the seat back frame, The aforementioned reinforcement is, A flat main body, It has an extension portion that extends from the main body portion toward the upper part of the side frame and has a shape that becomes narrower toward the upper part, Multiple reinforcements are arranged at the same position on the side frame such that their upwardly extending portions partially overlap. Seat frame.

2. The plurality of reinforcements are arranged such that the lower ends of the extensions overlap, but the upper ends of the extensions do not overlap. The seat frame according to claim 1.

3. Of the plurality of reinforcements, the reinforcement positioned in contact with the side frame has a pair of flange portions on its main body that sandwich the side frame from the front and rear directions. The seat frame according to claim 1.

4. Each of the aforementioned multiple reinforcements is a pair of reinforcements, each having the flange portion, and the flange portions are arranged so that they face opposite each other. The seat frame according to claim 3.

5. The aforementioned multiple reinforcements are The extension portion is, A height side positioned along one of the front or rear ends of the aforementioned side frame, The hypotenuse extending from the other end of the side frame toward the upper end of the height side, It has a right-angled triangular shape with a base which is the connection part with the main body, The extension portion has a reinforcement such that the height side has a flange portion. The seat frame according to claim 1.

6. Each of the aforementioned multiple reinforcements is a set of two reinforcements, each having the right-angled triangular shape and the flange portion in its extended portion. The two reinforcements mentioned above are The height side of one of the reinforcements is positioned along one of the front or rear ends of the side frame. The other side of the reinforcement is positioned along the other front and rear ends of the side frame. The seat frame according to claim 5.

7. The aforementioned side frame is made of resin. The seat frame according to claim 1.

8. A seat for a mobile body, having a seat frame according to any one of claims 1 to 7.

9. A mobile body having a sheet for a mobile body as described in claim 8.

10. The mobile body according to claim 9, which is an automobile.

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