seat

Abstract

To disclose one example of a seat which can change an inclination angle of the front end side of a seat cushion.SOLUTION: A falling restriction member 27 which restricts a tilt pin 25 from falling from an opening of a front end of a side frame 7 is fixed to the side frame 7. The structure can inhibit the tilt pin 25 from falling from the side frames 7, 8. The falling restriction member 27 faces the tilt pin 25 in at least a range of 90 degrees of a front lower part of the tilt pin 25. In other words, the falling restriction member 27 is integrated with an area located below the through hole 7B of the side frame 7.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present disclosure relates to a seat capable of changing the inclination angle of the front end side of a seat cushion.

Background Art

[0002] For example, the seat described in Patent Document 1 includes a mechanism capable of changing the inclination angle of the front end side of the seat cushion. In this mechanism, a pin (54) supporting an arm (44) is inserted into a long hole (36) from the front of the long hole (36). The reference numerals in parentheses are reference numerals in Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the invention described in Patent Document 1, when an external force including a forward component acts on the pin (54), there is a possibility that the pin (54) may fall off from a side frame such as a lower arm.

[0005] The present disclosure discloses an example of a "seat capable of changing the inclination angle of the front end side of a seat cushion" in consideration of the above problems.

Means for Solving the Problems

[0006] A seat capable of changing the inclination angle of the front end side of a seat cushion (3) preferably includes at least one of the following constituent elements. In other words, the constituent element is a side frame (7) which constitutes part of the frame of the seat cushion (3), and is positioned on one end in the seat width direction and extends in the seat front-rear direction; a tilt arm (21) which extends in the seat front-rear direction and has its rear end pivotably connected to the side frame (7), and is for changing the tilt angle of the front end of the seat; a swing arm (23) for swinging and displacing the tilt arm (21), with its front end pivotably connected to the front end of the tilt arm (21) and its rear end pivotably connected to the side frame (7); and a tilt pin (25) which rotatably connects the swing arm (23) to the side frame (7), and is positioned forward of the connection portion (7A) between the side frame (7) and the tilt arm (21) and extends in the seat width direction.

[0007] And at the front end of the side frame (7) is a through hole (7B) through which a tilt pin (25) is inserted, Current From the opening that opens at the front end (7C) to the rear side to A recessed, concave or U-shaped through hole (7B) is provided, and the side frame (7) is designed so that the tilt pin (25) does not fall out from the opening at the front end (7C). of It is desirable that the regulating detachment prevention member (27) is fixed in place. This can prevent the tilt pin (25) from detaching from the side frame (7) in the seat.

[0008] The sheet may also have the following configuration, for example. In other words, it is desirable that the detachment-preventing member (27) faces the tilt pin (25) in a range of at least 90 degrees in the lower front side of the tilt pin (25).

[0009] As a result, the detachment prevention member (27) functions as a reinforcing member that reinforces the lower part of the through hole (7B), so that deformation of the side frame (7) can be suppressed even when an external force including forward and downward components acts on the tilt pin (25). Consequently, the detachment of the tilt pin (25) can be suppressed.

[0010] The detachment prevention member (27) has a plate-like portion (27B) that is substantially parallel to the side surface (7E) of the side frame (7), and a flange portion (27C) that extends in a direction intersecting the plate-like portion (27B), and it is desirable that the end face (27D) of the plate-like portion (27B) faces the tilt pin (25).

[0011] As a result, the rigidity of the detachment prevention member (27) is increased, which can suppress deformation of the side frame (7). Consequently, the detachment of the tilt pin (25) can be reliably suppressed. The tilt pin (25) has a rod-shaped shaft portion (25A) and a flange-shaped flange portion (25B) provided on one end of the shaft portion (25A) in the axial direction, and it is desirable that a gap (25C) of a size that allows a plate-shaped portion (27B) to be fitted between the flange portion (25B) and the side surface (7E) of the side frame (7).

[0012] As a result, even if a large external force acts on the tilt pin (25) and the seat cushion (3) deforms so that the swing arm (23) is displaced toward the center in the seat width direction, the plate-shaped part (27B) fits into the gap (25C), thus preventing the swing arm (23) connected to the tilt pin (25) from being displaced too much toward the center in the seat width direction.

[0013] 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]

[0014] [Figure 1] This figure shows a vehicle seat according to the first embodiment. [Figure 2] It is a figure showing a tilt unit according to the first embodiment. [Figure 3] It is a figure showing a tilt unit according to the first embodiment. [Figure 4] It is a figure showing a tilt unit according to the first embodiment. [Figure 5] It is a figure showing a cushion frame according to the first embodiment. [Figure 6] It is a figure showing a side frame according to the first embodiment. [Figure 7] It is a figure showing a connection structure between the side frame and the tilt pin. [Figure 8] It is a figure showing a connection structure between the side frame and the tilt pin. [Figure 9] It is a figure showing a connection structure between the swing arm and the tilt pin. [Figure 10] It is a figure showing the side frame and the dropout regulation member. [Figure 11] It is a figure showing the side frame and the dropout regulation member.

Mode for Carrying Out the Invention

[0015] The following "Embodiments of the Invention" show an example of embodiments belonging to the technical scope of the present disclosure. That is, the invention specific matters described in the claims are not limited to the specific configurations, structures, etc. shown in the following embodiments.

[0016] This embodiment is an example in which the 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, slashes, etc. indicating directions attached to each figure are described to facilitate understanding of the relationship between the figures and the shape of members or parts.

[0017] 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. A figure with slashes does not necessarily show a cross-sectional view.

[0018] At least one of the components or parts described with reference numerals is provided unless otherwise specified, such as "one". In other words, if there is no such specification, such as "one", there may be two or more such components. The vehicle seat shown in this disclosure comprises at least one of the components, such as the components or parts described with reference numerals, and the structural parts shown in the illustration.

[0019] (First Embodiment) <1. Overview of Vehicle Seats> As shown in Figure 1, the vehicle seat 1 includes at least a seat cushion 3 and a seat back (not shown). The seat cushion 3 is the part that supports the seated person's buttocks. The seat back is the part that supports the seated person's back.

[0020] The seat cushion 3 is composed of at least a cushion frame 5 and a cushion pad made of urethane or the like (not shown). The cushion frame 5 constitutes the skeleton of the seat cushion 3.

[0021] The cushion frame 5, as shown in Figure 2, includes a frame body 6 and a tilt unit 20, etc. The frame body 6 includes at least two side frames 7, 8 and connecting members 9, 10, etc.

[0022] The side frame 7 is a reinforcing member positioned at one end of the cushion frame 5 in the seat width direction (the right end in Figure 2) and extending in the front-to-back direction of the seat. The side frame 8 is a reinforcing member positioned at the other end of the cushion frame 5 in the seat width direction (the left end in Figure 2) and extending in the front-to-back direction of the seat.

[0023] The connecting members 9 and 10 extend in the seat width direction (left-right direction in Figure 2) and connect the side frame 7 and the side frame 8. In this embodiment, the frame body 6 is fixed to the vehicle body via two sliding devices 11.

[0024] The tilt unit 20 is a mechanism that allows the tilt angle of the front end of the seat cushion 3 to be changed. The tilt unit 20 is attached to the front end of the frame body 6, that is, to the front end of the side frames 7 and 8.

[0025] <2. About the Tilt Unit> <2.1 Tilt Unit Configuration> The tilt unit 20 is configured to include at least tilt arms 21, 22, swing arms 23, 24, tilt pins 25, 26, a front panel 29, and connecting members 30, as shown in Figures 3 and 4.

[0026] As shown in Figure 1, the tilt arm 21 extends in the front-rear direction of the seat, and its rear end is pivotably connected to the side frame 7. The tilt arm 22 also extends in the front-rear direction of the seat, and its rear end is pivotably connected to the side frame 8.

[0027] Then, when the two tilt arms 21 and 22 move in conjunction with each side frame 7 and 8, the tilt angle of the front panel 29, which is the front end of the seat cushion 3, is changed.

[0028] The front panel 29 is a panel-shaped member that connects the front ends of the two tilt arms 21 and 22. The front ends of the two tilt arms 21 and 22 are also connected by a pipe-shaped connecting member 30.

[0029] As shown in Figure 4, the swing arm 23 is a component that causes the tilt arm 21 to swing and displace. The front end of the swing arm 23 is swingably connected to the front end of the tilt arm 21, and the rear end is swingably connected to the side frame 7.

[0030] The swing arm 24 is a component that causes the tilt arm 22 to swing and displace. The front end of the swing arm 24 is pivotably connected to the front end of the tilt arm 22, and the rear end is pivotably connected to the side frame 8.

[0031] As shown in Figure 3, the tilt pin 25 rotatably connects the swing arm 23 to the side frame 7. The tilt pin 25 is positioned forward of the connection portion 7A (see Figure 5) between the side frame 7 and the tilt arm 21 and extends in the seat width direction.

[0032] As shown in Figure 5, the tilt pin 26 rotatably connects the swing arm 24 to the side frame 8. The tilt pin 26 is positioned forward of the connection portion 8A (see Figure 1) between the side frame 7 and the tilt arm 21 and extends in the seat width direction.

[0033] In this embodiment, the oscillating arm 23 is composed of a sector gear 23A, as shown in Figure 7. The teeth 23B of the sector gear 23A are located behind the tilt pin 25, as shown in Figure 9.

[0034] As shown in Figure 4, an electric motor 31 is fixed to the tilt arm 21. The tilt pin 25 is integrated with the sector gear 23A by welding or the like. Therefore, when the electric motor 31 rotates, the sector gear 23A rotates around the tilt pin 25.

[0035] When the swing arm 23 swings, the swing arm 24 also swings mechanically in conjunction with it via the connecting member 30. At this time, the two tilt arms 21 and 22 swing in conjunction with the swing arms 23 and 24, so the inclination angle of the front end of the seat cushion 3 changes.

[0036] <2.2 Support structure for tilt pin> As shown in Figure 6, a through hole 7B is provided at the front end of the side frame 7. The through hole 7B is a concave or U-shaped through hole that is recessed towards the rear from the opening at the front end 7C of the side frame 7. The tilt pin 25 is inserted through this through hole 7B (see Figure 7).

[0037] A through-hole 8B is also provided at the front end of the side frame 8, similar to the side frame 7. The through-hole 8B is a concave or U-shaped through-hole that is recessed towards the rear from the opening at the front end 8C of the side frame 7. The tilt pin 26 is inserted through this through-hole 8B (see Figure 5).

[0038] The through holes 7B and 8B in this embodiment are elongated holes whose major axis direction is substantially parallel to the extension direction of the side frames 7 and 8. Therefore, the tilt pins 25 and 26 can rotate while sliding in the major axis direction within the corresponding through holes 7B and 8B.

[0039] Therefore, in this embodiment, extensions 7D and 8D are provided on the outer edges of the through holes 7B and 8B, as shown in Figure 6. The extensions 7D and 8D are portions that extend from the outer edges in a direction parallel to the axial direction of the tilt pins 25 and 26.

[0040] Furthermore, the connecting parts 21A (see Figure 7) and 22A (see Figure 8) between the tilt pins 25 and 26 and the swing arms 23 and 24, and the connecting parts 7A and 8A between the swing arms 23 and 24 and the side frames 7 and 8, are only rotatable and not capable of sliding displacement.

[0041] Furthermore, a fall-prevention member 27 is fixed to the side frame 7, as shown in Figure 7. The fall-prevention member 27 prevents the tilt pin 25 from falling out through the opening of the through hole 7B. of To restrict. A fall-restricting member 28 is fixed to the side frame 8 as shown in Figure 8. The fall-restricting member 28 prevents the tilt pin 26 from falling out through the opening of the through hole 8B. of To regulate.

[0042] In this embodiment, the detachment-preventing members 27 and 28 are provided with support parts 27A (see Figure 7) and 28A (see Figure 8) that support the shield 3A (see Figure 1). The shield 3A is a member that constitutes the front end design surface of the seat cushion 3.

[0043] As shown in Figure 10, the detachment prevention member 27 has a plate-like portion 27B and a flange portion 27C. As shown in Figure 11, the plate-like portion 27B is a plate-like part that is substantially parallel to the side surface 7E of the side frame 7.

[0044] Fall-off prevention shape part ( Flange section ) 27C is a wall-like portion extending in a direction intersecting with the plate-like portion 27B. The end face 27D of the plate-like portion 27B faces the tilt pin 25. Furthermore, as shown in Figure 10, the detachment-restricting member 27 faces the tilt pin 25 in a range θ of at least 90 degrees in front of and below the tilt pin 25. Furthermore, the anti-detachment shape portion 28B faces the tilt pin 26.

[0045] As shown in Figure 11, the tilt pin 25 has a rod-shaped shaft portion 25A and a flange portion 25B. The flange portion 25B is a flange-shaped part provided on one end of the shaft portion 25A in the axial direction. A gap 25C is provided between the flange portion 25B and the side surface 7E of the side frame 7, with dimensions such that a plate-shaped portion 27B can be fitted into it.

[0046] <3. Features of the vehicle seat according to this embodiment> In this embodiment of the cushion frame 5, the frame body 6 and the tilt unit 20 are assembled separately. The cushion frame 5 is then completed when the tilt unit 20 is attached to the frame body 6.

[0047] When the tilt unit 20 is attached to the frame body 6, the tilt pins 25 and 26 are inserted into the through holes 7B and 8B, respectively, through the openings at the front ends 7C and 8C. Subsequently, the detachment prevention members 27 and 28 are fixed to the side frames 7 and 8, respectively.

[0048] Furthermore, in the vehicle seat 1, since the detachment prevention members 27 and 28 are fixed to the side frames 7 and 8 (see Figures 7 and 8), the detachment of the tilt pins 25 and 26 from the side frames 7 and 8 can be suppressed in the vehicle seat 1.

[0049] The detachment prevention member 27 faces the tilt pin 25 in a range of at least 90 degrees in the front lower part of the tilt pin 25 (see Figure 10). In other words, the lower part of the through hole 7B of the side frame 7 has a configuration in which the detachment prevention member 27 is integrated.

[0050] As a result, the detachment prevention member 27 functions as a reinforcing member that reinforces the lower part of the through hole 7B. Therefore, even when an external force including forward and downward components acts on the tilt pin 25, deformation of the side frame 7 can be suppressed. Consequently, the detachment of the tilt pin 25 can be suppressed.

[0051] The detachment prevention member 27 has a plate-shaped portion 27B and a flange portion 27C, and the end face 27D of the plate-shaped portion 27B faces the tilt pins 25 and 26 (see Figure 11). As a result, the rigidity of the detachment prevention member 27 is increased, which can suppress deformation of the side frame 7. Consequently, the detachment of the tilt pin 25 can be reliably suppressed.

[0052] A gap 25C is provided between the flange portion 25B of the tilt pin 25 and the side surface 7E of the side frame 7, with dimensions that allow the plate-shaped portion 27B to fit into it (see Figure 11). As a result, if a large external force acts on the tilt pin 25 and the seat cushion 3 deforms so that the swing arm 23 is displaced towards the center in the seat width direction, the plate-shaped portion 27B will fit into the gap 25C.

[0053] Therefore, the detachment-restricting member 27 can prevent the tilt pin 25 from being displaced too far towards the center in the seat width direction. Consequently, the swing arm 23 connected to the tilt pin 25 can also be prevented from being displaced too far towards the center in the seat width direction.

[0054] (Other embodiments) In the above-described embodiment, In this embodiment, the tilt pins 25 and 26 were configured to rotate while sliding in the longitudinal direction within the through holes 7B and 8B. However, the disclosure is not limited thereto.

[0055] In other words, the disclosure may also include a configuration in which, for example, the connecting portions 21A and 22A between the tilt pins 25 and 26 and the swing arms 23 and 24, or the connecting portions 7A and 8A between the swing arms 23 and 24 and the side frames 7 and 8, rotate slidably, while the tilt pins 25 and 26 only rotate.

[0056] The detachment-preventing members 27 and 28 according to the above-described embodiment had a configuration having support portions 27A and 28A that support the shield 3A. However, this disclosure is not limited thereto. That is, the disclosure may also include, for example, a configuration in which the support portions 27A and 28A are eliminated.

[0057] In the embodiment described above, the detachment-restricting member 27 faced the tilt pin 25 in a range of at least 90 degrees in front of the tilt pin 25. However, the disclosure is not limited thereto. That is, the disclosure may be limited to, for example, the detachment-restricting member 27 being positioned to close the opening of the through hole 7B.

[0058] In the above-described embodiment, the end face 27D of the plate-shaped portion 27B of the detachment-restricting member 27 was configured to face the tilt pin 25. However, the disclosure is not limited thereto. That is, the disclosure may also include, for example, a configuration in which a flange portion is provided on the part of the detachment-restricting member 27 that faces the tilt pin 25.

[0059] In the above-described embodiment, the plate-shaped portion 27B could be fitted into the gap 25C between the flange portion 25B of the tilt pin 25 and the side surface 7E of the side frame 7. However, the disclosure is not limited thereto. That is, the disclosure may also include, for example, a configuration in which the gap 25C is eliminated.

[0060] 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.

[0061] 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]

[0062] 1...Vehicle seat 3...Seat cushion 3A...Shield 5…Cushion frame 6…Frame body 7…Side frame 7A...Connection part 7B...Through hole 7C...Front end 7D...Extension part 7E...Side 8...Side frame 8A...Connecting section 8B...Through hole 8C...Front end 9...Connecting member 11...Sliding device 20...Tilt unit 21...Tilt arm 21A...Connecting part 22...Tilt arm 22...Oscillating arm 23...Oscillating arm 23A…Sector gear 23B…Tooth 24…Oscillating arm 25...Tilt pin 25A...Shaft 25B...Flange 25C...Gap 26...Tilt pin 27...Loosening prevention member 27A...Support part 27B...Plate-shaped part 27C... Fall-off prevention shape part ( Flange section ) 27D...End face 28...Detachment prevention member 28B… Falling prevention shape part 29…Front panel 30… Connecting member 31… Electric motor

Claims

1. In a seat in which the tilt angle of the front end of the seat cushion can be changed, A side frame that constitutes part of the frame of the aforementioned seat cushion, comprising a side frame positioned at one end in the seat width direction and extending in the seat front-rear direction, A tilt arm extending in the front-rear direction of the seat and having its rear end pivotably connected to the side frame, comprising a tilt arm for changing the tilt angle of the front end of the seat, A swing arm for swinging and displacing the tilt arm, wherein the front end of the swing arm is pivotably connected to the front end of the tilt arm, and the rear end of the swing arm is pivotably connected to the side frame, A tilt pin that rotatably connects the swing arm to the side frame, comprising a tilt pin positioned forward of the connection between the side frame and the tilt arm and extending in the seat width direction, The front end of the side frame is provided with a through-hole through which the tilt pin is inserted, and the through-hole is recessed to the rear from the opening that opens at the front end, and is concave or U-shaped. Furthermore, the side frame has a detachment-restricting portion positioned opposite the tilt pin, and a detachment-restricting member is fixed to the seat to restrict the tilt pin from falling out through the opening at the front end.

2. The sheet according to claim 1, wherein the detachment-preventing member faces the tilt pin in at least a 90-degree range in the lower front portion of the tilt pin.

3. The aforementioned detachment prevention member has a plate-like portion substantially parallel to the side surface of the side frame, and a flange portion extending in a direction intersecting the plate-like portion. The sheet according to claim 2, wherein the end face of the plate-like portion faces the tilt pin.

4. The tilt pin has a rod-shaped shaft portion and a flange-shaped flange portion provided on one end of the shaft portion in the axial direction. The sheet according to claim 3, wherein a gap of a size that allows the plate-like portion to be fitted is provided between the flange portion and the side surface of the side frame.

5. The aforementioned rocking arm is composed of a sector gear, The seat according to any one of claims 1 to 4, wherein the teeth of the sector gear are located behind the tilt pin.

6. The seat according to claim 5, wherein an electric motor is fixed to the tilt arm for oscillating the sector gear around the tilt pin.

7. The sheet according to any one of claims 1 to 4, wherein the through hole is elongated in shape, with its major axis direction substantially parallel to the extension direction of the side frame.

8. Equipped with a shield that covers the sides of the cushion frame, Furthermore, the sheet according to any one of claims 1 to 4, wherein the detachment prevention member has a support portion that supports the shield.

Images