Vehicle seats

Abstract

An example of a vehicle seat is disclosed that includes a connecting plate that facilitates the placement of a walk-in mechanism and increases the bending rigidity against loads from the seat width direction. [Solution] The first connecting plate 41 is composed of a first plate portion 41A, a second plate portion 41B, and a stepped portion 41C, etc. The first plate portion 41A is a flat plate surface on which a walk-in mechanism is provided. The second plate portion 41B is a plate surface provided below the first plate portion 41A and connected to the cushion frame, and is a flat plate surface offset in the sheet width direction relative to the first plate portion 41A. The stepped portion 41C is a portion connecting the first plate portion 41A and the second plate portion 41B, and is provided below the through hole 41D to which the connecting pipe 34 is connected. This makes it easy to arrange the walk-in mechanism and increases the bending rigidity against load from the sheet width direction.

Description

Technical Field

[0001] This disclosure relates to a seat mounted on a vehicle.

Background Art

[0002] For example, the connecting plate described in Patent Document 1 has stepped portions provided on the upper and lower sides sandwiching the connection portion with the connecting pipe. The connecting plate is a member that connects the side frame of the cushion frame (also referred to as the lower arm) and the back frame.

[0003] Note that the back frame is usually connected to the connecting plate via a recliner. The connecting pipe is a member that connects the connecting plate arranged on the right end side of the seat and the connecting plate arranged on the left end side of the seat.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the connecting plate described in Patent Document 1, since stepped portions are provided on the upper and lower sides sandwiching the connection portion with the connecting pipe, the flat portion above the connection portion has to be small. Therefore, it is difficult to arrange a walk - in mechanism on the flat portion.

[0006] Furthermore, in the connecting plate, since stepped portions are provided on the upper and lower sides sandwiching the connection portion with the connecting pipe, it is difficult to increase the bending rigidity against the load in the seat width direction. This disclosure discloses an example of a vehicle seat in view of the above points.

Means for Solving the Problems

[0007] A vehicle seat installed in a vehicle should preferably have at least one of the following constituent requirements: In other words, the constituent elements are a first side frame (31) that constitutes the frame of the seat cushion, the first side frame (31) extending in the front-rear direction of the seat, a second side frame (32) that constitutes the frame of the seat cushion, the second side frame (32) that extends in the front-rear direction of the seat at a position offset from the first side frame (31) in the seat width direction, a first connecting plate (41) fixed to the rear end of the first side frame (31) and extending upward, and a second connecting plate (41) fixed to the rear end of the second side frame (32) and extending upward The seat comprises a second connecting plate (42), a connecting member (34) extending in the seat width direction and connecting the first connecting plate (41) and the second connecting plate (42), a back frame (50) that is pivotably connected in the front-rear direction of the seat via recliners (61, 62) attached to the upper ends of the first connecting plate (41) and the second connecting plate (42), and a walk-in mechanism (7) provided on the first connecting plate (41) that enables at least the function of tilting the seat back forward of the seat.

[0008] Furthermore, it is desirable that the first connecting plate (41) has at least a planar first plate portion (41A) on which the walk-in mechanism (7) and recliner (61) are provided, a second plate portion (41B) provided below the first plate portion (41A) and connected to the first side frame (31), the second plate portion (41B) being planar and offset in the seat width direction relative to the first plate portion (41A), and a stepped portion (41C) connecting the first plate portion (41A) and the second plate portion (41B), the stepped portion (41C) being provided on the first side frame (31) side of the portion to which the connecting member (34) is connected.

[0009] As a result, the first connecting plate (41) for the vehicle seat may have a configuration with fewer steps compared to the connecting plate described in Patent Document 1. Therefore, in the first connecting plate (41), the portion of the first plate portion (41A) in which the walk-in mechanism (7) can be arranged may be larger than that of the connecting plate described in Patent Document 1. Consequently, in the first connecting plate (41), it may be possible to easily arrange the walk-in mechanism (7) in the first plate portion (41A).

[0010] Furthermore, since the configuration has fewer stepped sections compared to the connecting plate described in Patent Document 1, the bending rigidity of the first connecting plate (41) against load from the sheet width direction can be greater than that of the connecting plate described in Patent Document 1.

[0011] The vehicle seat may also have the following configuration, for example: In other words, when the imaginary line drawn by the boundary between the stepped portion (41C) and the first plate portion (41A) is defined as the boundary line (L1), it is desirable that at least the portion of the boundary line (L1) corresponding to the lower side of the connecting member (34) be configured in a curved shape, and the other portions be configured in a straight shape.

[0012] Furthermore, it is desirable that the first connecting plate (41) is positioned on the opposite side of the seat belt buckle, and the second connecting plate (42) is positioned on the seat belt buckle side.

[0013] Furthermore, it is desirable that the second connecting plate (42) has a planar first planar portion (42A) on which the recliner (62) is mounted, a second planar portion (42B) provided below the first planar portion (42A) and connected to the second side frame (32), the second planar portion (42B) being planar in the seat width direction relative to the first planar portion (42A), and a stepped portion (42C) connecting the first planar portion (42A) and the second planar portion (42B), the stepped portion (42C) provided on the recliner (62) side of the portion to which the connecting member (34) is connected.

[0014] As a result, in the second connecting plate (42), the portion to which the connecting member (34) is connected is located on the second flat portion (42B). Therefore, in the second connecting plate (42), when the tension acting on the seat belt is transmitted from the second side frame (32) to the second connecting plate (42) to the connecting member (34), there are no steps that would hinder the transmission of the tension. Thus, it becomes possible to efficiently transmit the tension acting on the seat belt to the connecting member (34) via the second connecting plate (42).

[0015] Incidentally, the symbols in each of the parentheses above are just examples showing the correspondence with the specific configurations etc. described in the embodiments described later, and this disclosure is not limited to the specific configurations etc. indicated by the symbols in the parentheses above. [Brief explanation of the drawing]

[0016] [Figure 1] This figure shows a vehicle seat according to the first embodiment. [Figure 2] This diagram shows the connection structure between the back frame and the cushion frame. [Figure 3] This is a diagram showing the first connecting plate according to the first embodiment. [Figure 4] This is a diagram showing the first connecting plate according to the first embodiment. [Figure 5] This is a diagram showing the second connecting plate according to the first embodiment. [Figure 6] This is a diagram showing the second connecting plate according to the first embodiment. [Modes for carrying out the invention]

[0017] The following "Embodiments of the Invention" are examples of embodiments that fall within the technical scope of this disclosure. In other words, the features defining the invention as described in the claims are not limited to the specific configurations and structures shown in the embodiments below.

[0018] This embodiment is an example in which the vehicle seat 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, obliques, etc. indicating directions attached to each figure are described to make it easier to understand the relationship between each figure and the shape of members or parts.

[0019] Therefore, the vehicle seat is not limited to the directions attached to each figure. The directions shown in each figure are the directions in the state where the vehicle seat according to this embodiment is assembled to the vehicle. The figure with an oblique is not always a cross-sectional view.

[0020] At least the members or parts described with reference numerals are provided with at least one, except when specified as "one". That is, when there is no specification such as "one", two or more of such members may be provided. The vehicle seat shown in the present disclosure includes at least one of the components such as the members or parts described with reference numerals and the structural parts shown in the drawings.

[0021] (First Embodiment) <1. Overview of Vehicle Seat> As shown in FIG. 1, the vehicle seat 1 includes at least a seat cushion 3 and a seat back 5. The seat cushion 3 is a part for supporting the buttocks of the seated person. The seat back 5 is a part for supporting the back of the seated person.

[0022] The seat cushion 3 is mounted on the vehicle via a slide device (not shown). The slide device supports the seat cushion 3, that is, the vehicle seat 1 slidably in the seat front-rear direction.

[0023] The slide device has at least a movable rail and a fixed rail. The fixed rail is fixed in a stationary state with respect to the vehicle. The movable rail is slidably connected to the fixed rail. And the vehicle seat 1 is connected to the movable rail.

[0024] The seat cushion 3 is constructed with a cushion frame 30 and a cushion pad (not shown), etc. The cushion frame 30 is a skeletal member of the seat cushion 3 and has at least a first side frame 31 and a second side frame 32, etc.

[0025] The first side frame 31 is a lower arm positioned at one end in the seat width direction and extending in the seat front-rear direction. The second side frame 32 is a lower arm positioned offset from the first side frame 31 at the other end in the seat width direction and extending in the seat front-rear direction.

[0026] The front end of the first side frame 31 and the front end of the second side frame 32 are connected by a connecting pipe 33. This connecting pipe 33 extends in the width direction of the seat and connects the first side frame 31 and the second side frame 32.

[0027] The seat back 5 is composed of a back frame 50 and a back pad (not shown), etc. The back frame 50 is a skeletal member of the seat back 5 and includes at least a first side frame 51 and a second side frame 52, etc.

[0028] The first side frame 51 is a member positioned at one end in the sheet width direction and extending substantially vertically. The second side frame 52 is a member positioned offset from the first side frame 51 at the other end in the sheet width direction and extending vertically.

[0029] The upper end of the first side frame 51 and the upper end of the second side frame 52 are connected by a connecting pipe 53. The connecting pipe 53 extends in the direction of the seat width and connects the first side frame 51 and the second side frame 52.

[0030] The cushion frame 30 and the back frame 50 are connected via a connecting plate 40 and a recliner 60, etc. The recliner 60 is a device for changing or maintaining the angle of the back frame 50 relative to the cushion frame 30.

[0031] Furthermore, the recliners 61 and 62 are positioned vertically above their corresponding movable rails. In other words, at least a portion of the recliners 61 and 62 projected onto the virtual horizontal plane overlaps with the corresponding movable rails projected onto the virtual horizontal plane.

[0032] The connecting plate 41 (hereinafter referred to as the first connecting plate 41) is a plate material that is fixed to the rear end of the first side frame 31 and extends upward, as shown in Figure 2. The recliner 61 is connected to the upper end of the first connecting plate 41. The lower end of the first side frame 51 is connected to the recliner 61.

[0033] The recliner 61 and the first side frame 51 are positioned on the side of the connecting plate 42 (hereinafter referred to as the second connecting plate 42) relative to the first connecting plate 41. The walk-in mechanism 7 is positioned on the side of the first connecting plate 41 opposite to the recliner 61.

[0034] The walk-in mechanism 7 is a mechanism for realizing the function of at least the seat back 5 tilting forward. In this embodiment, the walk-in mechanism 7 is a mechanism for simultaneously releasing the locked state of the recliner 60 and the sliding device.

[0035] In other words, the walk-in mechanism 7 according to this embodiment is a mechanism for realizing a function that allows the seat cushion 3 to slide in the front-rear direction of the seat in conjunction with the operation of the seat back 5 tilting forward of the seat.

[0036] Specifically, when the operating cable 7A of the walk-in mechanism 7 is operated, the rod 7B rotates, releasing the lock on the recliners 61 and 62, and also releasing the lock on the sliding device. As a result, the seat back 5 tilts forward due to the elastic force of the spiral spring 7C.

[0037] The second connecting plate 42 is a plate that is fixed to the rear end of the second side frame 32 and extends upward. The recliner 62 is connected to the upper end of the second connecting plate 42. The lower end of the second side frame 52 is connected to the recliner 62.

[0038] The first connecting plate 41 and the second connecting plate 42 are connected by a connecting pipe 34. The connecting pipe 34 extends in the width direction of the sheet and connects the first connecting plate 41 and the second connecting plate 42.

[0039] In this embodiment, the first connecting plate 41 is positioned on the opposite side of the seat belt from the buckle side, while the second connecting plate 42 is positioned on the buckle side of the seat belt. Incidentally, pin 8 in Figure 2 is the part to which the belt on the buckle side (not shown) is connected.

[0040] <2. Details of connecting plates, etc.> <2.1 First connecting plate> As shown in Figure 3, the first connecting plate 41 is composed of a first plate portion 41A, a second plate portion 41B, and a stepped portion 41C, etc. In this embodiment, the first plate portion 41A, the second plate portion 41B, and the stepped portion 41C are integrally formed by press working on a single sheet of material.

[0041] The first plate section 41A is a flat plate surface on which the walk-in mechanism 7 and the recliner 61 are provided. The walk-in mechanism 7 is located on one side of the first plate section 41A. The recliner 61 is located on the other side of the first plate section 41A.

[0042] The second plate portion 41B is a flat plate surface provided below the first plate portion 41A and connected to the first side frame 31. The second plate portion 41B is offset from the first plate portion 41A in the sheet width direction.

[0043] In this embodiment, the second plate portion 41B is positioned on the same side as the walk-in mechanism 7 relative to the first plate portion 41A. Specifically, the second plate portion 41B is shifted to the right relative to the first plate portion 41A. The second plate portion 41B is fixed to the right side of the first side frame 31 with bolts.

[0044] The stepped portion 41C is the part that connects the first plate portion 41A and the second plate portion 41B, and is located on the first side frame 31 side of the part to which the connecting pipe 34 is connected (through hole 41D in Figure 3). In other words, the stepped portion 41C is located below the through hole 41D.

[0045] As shown in Figure 4, when the imaginary line drawn by the boundary between the stepped portion 41C and the first plate portion 41A is defined as boundary line L1, at least portion L2 of boundary line L1 corresponding to the lower side of the through hole 41D is configured in a curved shape, while the other portions L3 and L4 are configured in a straight shape.

[0046] <2.2 Second connecting plate> As shown in Figure 5, the second connecting plate 42 is composed of a first plate portion 42A, a second plate portion 42B, and a stepped portion 42C. In this embodiment, the first plate portion 42A, the second plate portion 42B, and the stepped portion 42C are integrally formed by press working on a single sheet of material.

[0047] The first plate portion 42A is a flat first planar portion on which the recliner 62 is mounted. The recliner 62 is located on the first connecting plate 41 side, i.e., the right side, of the first plate portion 42A.

[0048] The second plate portion 42B is a plate surface provided below the first plate portion 42A and connected to the second side frame 32. The second plate portion 42B is a planar second surface that is offset parallel to the sheet width direction relative to the first plate portion 42A.

[0049] In this embodiment, the second plate portion 42B is offset to the right of the first connecting plate 41 relative to the first plate portion 42A. The second plate portion 42B is fixed to the right side of the second side frame 32 with bolts.

[0050] The stepped portion 42C is the part that connects the first plate portion 42A and the second plate portion 42B, and is located on the recliner 62 side of the part to which the connecting pipe 34 is connected (through hole 42D in Figure 5). In other words, the stepped portion 42C is located above the through hole 42D.

[0051] As shown in Figure 6, when the imaginary line drawn by the boundary between the stepped portion 42C and the second plate portion 42B is defined as boundary line L1, at least portion L2 of boundary line L1 corresponding to the lower side of the through hole 42D is configured in a curved shape, while the other portions L3 and L4 are configured in a straight line shape.

[0052] <3. Features of the vehicle seat according to this embodiment> In the first connecting plate 41 of the vehicle seat 1 according to this embodiment, the stepped portion can be made smaller compared to the connecting plate described in Patent Document 1. In other words, the first connecting plate 41 has only one stepped portion 41C. In contrast, the connecting plate described in Patent Document 1 has two.

[0053] Therefore, in the first connecting plate 41, the portion of the first plate portion 41A in which the walk-in mechanism 7 can be arranged may be larger than that of the connecting plate described in Patent Document 1. Consequently, in the first connecting plate 41, it may be possible to easily arrange the walk-in mechanism 7 in the first plate portion 41A.

[0054] Furthermore, since the first connecting plate 41 has fewer stepped portions compared to the connecting plate described in Patent Document 1, the bending rigidity of the first connecting plate 41 with respect to load from the sheet width direction can be greater than that of the connecting plate described in Patent Document 1.

[0055] At least the portion of the boundary line L1 of the first connecting plate 41 corresponding to the lower side of the connecting pipe 34 is curved, while the other portion is straight. This helps to suppress a decrease in rigidity around the through hole 41D.

[0056] The stepped portion 42C of the second connecting plate 42 is located on the recliner 62 side of the portion to which the connecting pipe 34 is connected. As a result, in the second connecting plate 42, the portion to which the connecting pipe 34 is connected is located at the second plate portion 42B.

[0057] Therefore, the second connecting plate 42 is configured such that there are no steps that would hinder the transmission of tension acting on the seat belt when it is transmitted from the second side frame 32 to the second connecting plate 42 and then to the connecting pipe 34. As a result, it becomes possible to efficiently transmit the tension acting on the seat belt to the connecting pipe 34 via the second connecting plate 42.

[0058] (Other embodiments) The walk-in mechanism 7 according to the above embodiment was a mechanism for realizing a function that allows the seat cushion 3 to slide in the front-rear direction of the seat in conjunction with the operation of the seat back 5 tilting forward of the seat.

[0059] However, this disclosure is not limited thereto. That is, for example, the walk-in mechanism 7 only needs to be able to perform the function of tilting the seat back 5 forward of the seat.

[0060] In the embodiments described above, the first connecting plate 41 and the second connecting plate 42 had different structures. However, this disclosure is not limited thereto. That is, the disclosure may, for example, have the same structure as the first connecting plate 41 and the second connecting plate 42.

[0061] In the embodiments described above, the second plate portions 41B and 42B were shifted to the right relative to the first plate portions 41A and 42B. However, the disclosure is not limited thereto. That is, the disclosure may, for example, have the second plate portions 41B and 42B shifted to the left relative to the first plate portions 41A and 42B.

[0062] In the above-described embodiment, at least the portion of the boundary line L1 corresponding to the lower side of the connecting pipe 34 was configured in a curved shape, while the other portion was configured in a straight shape. However, the present disclosure is not limited thereto.

[0063] In other words, the disclosure may, for example, be a configuration in which the entire boundary line L1 is curved, or a configuration in which the entire boundary line L1 is curved. It is desirable that the radius of curvature of the curved portion of the boundary line L1 be as large as possible.

[0064] In the embodiments described above, the vehicle seat according to this disclosure was applied to a vehicle. However, the application of the invention disclosed herein is not limited to this. That is, the disclosure can be applied, for example, to seats used in vehicles such as railway cars, ships and aircraft, as well as to stationary seats used in theaters, homes, etc.

[0065] Furthermore, this disclosure is not limited to the embodiments described above, but is sufficient to be consistent with the intent of the disclosures described in the embodiments described above. Therefore, it may be a configuration in which at least two of the embodiments described above are combined, or a configuration in which any of the illustrated components or components described with reference numerals in the embodiments described above are omitted. [Explanation of Symbols]

[0066] 41… First connecting plate 41A… First plate section 41B… Second plate section 41C… Stepped section 41D… Through hole

Claims

1. In vehicle seats installed in vehicles, A first side frame that constitutes the frame of the seat cushion, comprising a first side frame extending in the front-to-back direction of the seat, A second side frame that constitutes the frame of the seat cushion, the second side frame extending in the front-rear direction of the seat at a position offset from the first side frame in the seat width direction, A first connecting plate fixed to the rear end of the first side frame and extending upward, A second connecting plate fixed to the rear end of the second side frame and extending upward, A connecting member extending in the width direction of the sheet and connecting the first connecting plate and the second connecting plate, A back frame is connected to the seat so as to be able to swing in the front-rear direction via recliners attached to the upper ends of the first and second connecting plates, respectively. The first connecting plate is provided with a walk-in mechanism that enables at least the seat back to fold forward of the seat, The aforementioned first connecting plate is, The walk-in mechanism and the planar first plate portion on which the recliner is provided, A second plate portion provided below the first plate portion and connected to the first side frame, the second plate portion being planar and offset in the sheet width direction relative to the first plate portion, and A stepped portion connecting the first plate portion and the second plate portion, wherein the stepped portion is provided on the first side frame side from the portion to which the connecting member is connected. A vehicle seat that has [a certain feature].

2. When the imaginary line drawn by the boundary between the stepped portion and the first plate portion is defined as the boundary line, The vehicle seat according to claim 1, wherein at least the portion of the boundary line corresponding to the lower side of the connecting member is configured in a curved shape, and the other portion is configured in a straight shape.

3. The first connecting plate is positioned on the opposite side of the seat belt buckle, The second connecting plate is located on the buckle side of the seat belt. Furthermore, the second connecting plate is At least the first planar portion on which the recliner is attached, A second planar portion provided below the first planar portion and connected to the second side frame, the second planar portion being planar in the sheet width direction relative to the first planar portion, and A stepped portion connecting the first planar portion and the second planar portion, having a stepped portion provided on the recliner side from the portion to which the connecting member is connected. A seat for a vehicle according to claim 1 or 2.

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