Vehicle seat

Abstract

To reduce a load input to a bridging member when an occupant of a vehicle gets on and off.SOLUTION: The vehicle seat 10 is equipped with a pair of right and left side frames 22, a front panel 24, and a movable portion 50. The spanning member spans between the pair of left and right side frames 22 in the seat left-right direction. A portion on the rear side of the bridging member is a protruding portion 52 that protrudes toward the seat upper side with respect to the side frame 22.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] Patent Document 1 below discloses a vehicle seat with an adjustable cushion length that can withstand large loads. The vehicle seat described in this document includes a front panel located at the front end of the seat cushion, a sliding device that has a sliding member and displaces a movable part in the front-rear direction of the seat, and a bracket that is connected to the front panel so as to be movable in the front-rear direction of the seat and that displaces integrally with the sliding member. The load acting on the movable part is transmitted to the front panel via the bracket, making it possible for the vehicle seat to withstand large loads input to the movable part. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-131625 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the configuration described in Patent Document 1 is useful from the viewpoint of being able to withstand a large load input to a movable part, but there is room for improvement in terms of reducing the load input to a hanging member such as a front panel when a vehicle occupant gets in and out of the vehicle.

[0005] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a vehicle seat that can reduce the load input to a bridge member when an occupant gets in and out of the vehicle. [Means for solving the problem]

[0006] The vehicle seat of the first aspect comprises a pair of left and right side frames arranged at intervals in the left-right direction of the seat, which form part of the skeleton of the seat cushion that supports the buttocks and thighs of a seated occupant from below the seat, and a hanging member that is suspended between the pair of left and right side frames in the left-right direction of the seat and supports the thighs of the seated occupant from below, and the outer rear portion of the hanging member in the seat width direction forms a protrusion that protrudes above the seat relative to the side frames.

[0007] In the vehicle seat of the first aspect, the rear portion of the connecting member forms a protrusion that protrudes upward from the side frame. Therefore, compared to a configuration without a protrusion, the body of the vehicle occupant can be moved closer to the protrusion when getting in or out of the vehicle. As a result, the protrusion can bear the load of the vehicle occupant when getting in or out of the vehicle. This reduces the load input from the occupant to the portion of the connecting member forward of the protrusion when getting in or out of the vehicle.

[0008] The vehicle seat of the second aspect is the vehicle seat of the first aspect, wherein the rear portion of the hanging member is a supported portion that is supported on the pair of left and right side frames so as to be rotatable with the left-right direction of the seat as the axial direction, so that the hanging member is displaced relative to the pair of left and right side frames to adjust the position of the front end of the seat cushion in the up-down direction of the seat, and further comprises a movable portion that is supported by the hanging member and displaced in the front-to-back direction of the seat relative to the hanging member to adjust the length of the seat cushion in the front-to-back direction of the seat, and the portion of the hanging member above the seat relative to the supported portion is the protruding portion.

[0009] In the vehicle seat of the second aspect, the position of the front end of the seat cushion in the up-down direction of the seat is adjusted by displacing the connecting member relative to the pair of left and right side frames. Furthermore, the length of the seat cushion in the front-to-rear direction of the seat is adjusted by displacing the movable part in the front-to-rear direction of the seat relative to the connecting member. Here, in the vehicle seat of the first aspect, the connecting member has a protruding part at a portion above the seat with respect to the supported part that protrudes toward the upper side of the seat relative to the side frames. Therefore, compared to a configuration without a protruding part, the body of the vehicle occupant can be moved closer to the protruding part when getting in or out of the vehicle. As a result, the protruding part can bear the load from the vehicle occupant when getting in or out of the vehicle. This reduces the load input from the occupant to the movable part when getting in or out of the vehicle.

[0010] The vehicle seat of the third aspect is the vehicle seat of the second aspect, in which, in a side view of the seat, the end of the protrusion on the rear side of the seat and above the seat is defined as a first load input portion, the end of the movable part on the front side of the seat and above the seat is defined as a second load input portion, and when a line passing through the first load input portion and drawn in the direction in which the movable part is displaced relative to the hanging member is defined as a contact line, the second load input portion is located below the contact line.

[0011] In the vehicle seat of the third aspect, the second load input portion is located below the contact line. This configuration reduces the frequency with which a vehicle occupant presses the second load input portion when getting in or out of the vehicle, compared to a configuration in which the second load input portion is located above the contact line. As a result, the load input from the vehicle occupant to the movable portion when getting in or out of the vehicle can be further reduced.

[0012] A fourth aspect of the vehicle seat is a vehicle seat of any one of the first to third aspects, in which, in a side view of the seat with an AM50 dummy as a seated occupant seated on the seat cushion, a line connecting the hip point and the center of the knee joint of the dummy is defined as a first line, a line parallel to the first line and passing through the tip of the protrusion in the protruding direction is defined as a second line, and a portion of the connecting member that is forward of the protrusion is located below the second line.

[0013] In the vehicle seat of the fourth aspect, the load from the vehicle occupant when getting in or out of the vehicle can be more reliably received by the protrusion than in a configuration in which the portion of the connecting member forward of the protrusion is not positioned below the second line, thereby reducing the load input from the occupant to the portion of the connecting member forward of the protrusion when getting in or out of the vehicle.

[0014] The vehicle seat of the fifth aspect is the vehicle seat of the fourth aspect, in which the shape and dimensions of the hanging member are set so that when the first line is rotated around the hip point toward the hanging member in a side view of the seat with the dummy seated on the seat cushion, the first line first comes into contact with the protrusion.

[0015] In the vehicle seat of the fifth aspect, compared to a configuration in which the shape and dimensions of the connecting member are set to a different shape and dimensions from those described above, the load from the vehicle occupant when getting in and out of the vehicle can be more reliably received by the protruding portion, thereby reducing the load input from the occupant to the portion of the connecting member forward of the protruding portion when getting in and out of the vehicle.

[0016] A sixth aspect of the vehicle seat is a vehicle seat of the fourth or fifth aspect, in which, in a side view of the seat with the dummy seated on the seat cushion, the protrusion is located rearward of the center between the hip point and the center of the knee joint on the first line.

[0017] In the vehicle seat of the sixth aspect, compared to a configuration in which the protruding portion is set at a different position from the above, the protruding portion can more reliably receive the load from the vehicle occupant when the vehicle occupant gets in and out, thereby reducing the load input from the occupant to the portion of the connecting member forward of the protruding portion when the vehicle occupant gets in and out.

[0018] The vehicle seat of the seventh aspect is a vehicle seat of any one of the first to sixth aspects, in which, when an AM50 dummy as a seated occupant is seated on the seat cushion, the protrusion is positioned outside the dummy in the seat width direction.

[0019] In the vehicle seat of the seventh aspect, the protruding portion is positioned on the outer side in the seat width direction relative to the dummy, thereby reducing the foreign body sensation of the protruding portion when seated.

[0020] The vehicle seat of the eighth aspect is a vehicle seat of the second aspect or any one of the first to sixth aspects having the configuration of the second aspect, wherein the tip of the protruding portion in the protruding direction is located rearward of the rotation center of the supported portion.

[0021] In the vehicle seat of the eighth aspect, the load from the vehicle occupant when getting in or out of the vehicle can be more reliably received by the protruding portion compared to a configuration in which the protruding tip of the protruding portion is located forward of the rotation center of the supported portion, thereby reducing the load input from the occupant to the portion of the connecting member forward of the protruding portion and to the movable portion when the occupant gets in or out of the vehicle. [Effects of the Invention]

[0022] The vehicle seat according to the present invention has the excellent effect of reducing the load input to the connecting member when an occupant gets in and out of the vehicle. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing a seat cushion of a vehicle seat according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view showing the front part of the seat cushion with the cushion pad removed. [Figure 3] FIG. 2 is a side view of the main part of the seat cushion as seen from the side. DETAILED DESCRIPTION OF THE INVENTION

[0024] 1 to 3, a vehicle seat 10 according to an embodiment of the present invention will be described. In the drawings, the arrow FR indicates the front side of the seat, the arrow UP indicates the upper side of the seat, the arrow LH indicates the left side in the seat width direction, and the arrow RH indicates the right side in the seat width direction. In the following description, unless otherwise specified, when referring to front-rear, up-down, and left-right directions, these refer to front-rear in the seat front-rear direction, up-down in the seat up-down direction, and left-right in the seat width direction.

[0025] As shown in Fig. 1, a vehicle seat 10 of this embodiment includes a seat cushion 12 that supports the buttocks of a seated occupant from below. As shown in Figs. 1 to 3, the seat cushion 12 includes a cushion frame 14 that forms the framework of the seat cushion 12, and a cushion pad 16 attached to the cushion frame 14. The vehicle seat 10 of this embodiment also includes a tilt mechanism 18 that adjusts the position of the front end of the seat cushion 12 in the up-down direction of the seat, and a length adjustment mechanism 20 that adjusts the length of the seat cushion 12 in the front-rear direction.

[0026] 2 and 3, the cushion frame 14 includes a pair of left and right side frames 22 that are spaced apart in the left-right direction and extend in the front-rear direction, and a front panel 24 that serves as a bridging member that is bridging between the pair of left and right side frames 22 in the left-right direction at the front ends of the pair of left and right side frames 22. The cushion frame 14 is supported by the seat slide rails 19 via lifter links 15.

[0027] The front panel 24 includes a central extending portion 26 extending in the left-right and front-rear directions. This central extending portion 26 slopes upward as it extends forward. The front panel 24 also includes a pair of left and right outer first extending portions 28 that extend from both left and right ends of the central extending portion 26 toward the opposite side of the central extending portion 26. The pair of left and right outer first extending portions 28 slope upward as they extend toward the opposite side of the central extending portion 26. The front panel 24 also includes a pair of left and right outer second extending portions 30 that extend downward from the ends of the pair of left and right outer first extending portions 28 opposite the central extending portion 26. Here, rearward portions of the pair of left and right outer first extending portions 28 and rearward portions of the pair of left and right outer second extending portions 30 form protrusions 32 that protrude rearward relative to the rear end of the central extending portion 26. As shown in Fig. 3, the pair of left and right outer second extending portions 30 are respectively disposed on the outer sides of the pair of left and right side frames 22 in the seat width direction. The rear end portions of the pair of left and right outer second extending portions 30 are supported by the pair of left and right side frames 22 via shaft members 34 so as to be rotatable about the left-right direction as the axial direction. The portions of the rear end portions of the pair of left and right outer second extending portions 30 that engage with the shaft members 34 will be referred to as supported portions 36.

[0028] As shown in FIGS. 1 to 3, the cushion pad 16 is attached to the cushion frame 14 from above. The side of the cushion pad 16 facing the seated occupant is covered with a trim. As shown in FIG. 1, the cushion pad 16 includes a main portion 38 that forms a central portion of the cushion pad 16 in the seat width direction, and a pair of left and right side support portions 40 that form both side portions of the cushion pad 16 in the seat width direction. The pair of left and right side support portions 40 protrude upward relative to the main portion 38. Here, a portion on the front end side of the main portion 38 forms a movable cushion portion 42 that is displaceable in the front-rear direction and up-down direction relative to a portion rearward of the main portion 38.

[0029] As shown in FIG. 3 , the tilt mechanism 18 includes the front panel 24 and a pair of left and right links 44. The left links 44 connect a front portion of the left outer first extension 28 of the front panel 24 to the left side frame 22. Although not shown, the right links 44 connect a front portion of the right outer first extension 28 of the front panel 24 to the right side frame 22. A predetermined one of the left links 44 and a predetermined one of the right links 44 are connected in the left-right direction via a tilt link pipe 46. This synchronizes the movement of the left links 44 and the right links 44. The predetermined one of the left links 44 and the tilt link pipe 46 are joined by welding. The predetermined one of the right links 44 and the tilt link pipe 46 are also joined by welding. The pair of left and right links 44 are displaced electrically or manually, so that the front panel 24 tilts up and down around the shaft member 34 as the center of rotation.

[0030] 2 and 3, the length adjustment mechanism 20 includes a length adjustment mechanism main body 48 fixed to the upper surface of the central extension 26 of the front panel 24. The length adjustment mechanism main body 48 includes a movable part 50 that displaces in the front-rear direction relative to the front panel 24, thereby displacing the movable cushion part 42 in the front-rear direction.

[0031] As shown in FIG. 3 , the portion of the overhanging portion 32 of the front panel 24 above the supported portion 36 forms a protruding portion 52 that protrudes upward relative to the side frame 22. In a side view of the seat, the rearward and upward end of the protruding portion 52 is referred to as a first load input portion P1. The first load input portion P1, which is the tip of the protruding portion 52 in the protruding direction, is located rearward relative to the rotation center of the supported portion 36. The frontward and upward end of the movable portion 50 is referred to as a second load input portion P2. Furthermore, a line that passes through the first load input portion P1 and is drawn in the direction in which the movable portion 50 is displaced relative to the front panel 24 (the direction of arrow A1) is referred to as a contact line L1. In this embodiment, the second load input portion P2 is positioned below the contact line L1.

[0032] In a side view of the seat, a dummy H, which is an AM50 dummy (a dummy representing the 50% percentile of adult American males) serving as a seated occupant, is seated on the seat cushion 12. A first line HL1 is a line connecting the hip point H1 and the knee joint center H2 of the dummy H, and a second line HL2 is a line parallel to the first line HL1 and passing through the tip of the protruding portion 52 in the protruding direction (first load input portion P1). In this embodiment, a portion of the front panel 24 that is forward of the protruding portion 52 is located below the second line HL2. The hip point H1 is a reference point for designing and measuring a seat, and the hip point position is determined for each size of dummy. The hip point coordinate when the dummy H is seated in the seat is the hip point H1. The hip point H1 also refers to the center of rotation connecting the torso and thighs of the dummy H.

[0033] Furthermore, when viewed from the side of the seat with the dummy H seated on the seat cushion 12, the shape and dimensions of the front panel 24 are set so that when the first line HL1 is rotated around the hip point H1 toward the front panel 24, the first line HL1 first comes into contact with the protrusion 52.

[0034] In addition, in a side view of the seat with the dummy H seated on the seat cushion 12, the protrusion 52 is located rearward of the center between the hip point H1 and the knee joint center H2 on the first line HL1.

[0035] Furthermore, when the dummy H is seated on the seat cushion 12, the protrusion 52 is located on the outer side of the dummy H in the seat width direction.

[0036] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0037] As shown in Figures 1 to 3, in the vehicle seat 10 of this embodiment, the front panel 24 tilts up and down around the shaft member 34 as the center of rotation, thereby adjusting the up and down position of the front end portion (movable cushion portion 42) of the seat cushion 12.

[0038] Furthermore, the movable cushion portion 42 is displaced in the front-rear direction when the movable portion 50 of the length adjustment mechanism main body 48 is displaced in the front-rear direction relative to the front panel 24. This adjusts the length of the seat cushion 12 in the front-rear direction.

[0039] Here, in the vehicle seat 10 of this embodiment, the portion of the overhanging portion 32 of the front panel 24 above the supported portion 36 is a protruding portion 52 that protrudes upward relative to the side frame 22. Therefore, compared to a configuration that does not have the protruding portion 52, the body of the vehicle occupant can be moved closer to the protruding portion 52 when the vehicle occupant gets in or out. As a result, the load from the vehicle occupant when getting in or out can be received by the protruding portion 52. This makes it possible to reduce the load input from the vehicle occupant to the movable portion 50 when the vehicle occupant gets in or out.

[0040] In addition, in this embodiment, the position of the second load input portion P2 is set below the contact line L1. In this configuration, the frequency with which an occupant presses the second load input portion P2 when getting in or out of the vehicle can be reduced compared to a configuration in which the second load input portion P2 is located above the contact line L1. As a result, the load input to the movable portion 50 by the occupant when getting in or out of the vehicle can be further reduced.

[0041] Furthermore, in this embodiment, a portion of the front panel 24 that is forward of the protrusion 52 is located below the second line HL2. In this configuration, compared to a configuration in which the portion of the front panel 24 that is forward of the protrusion 52 is not located below the second line HL2, the protrusion 52 can more reliably support the load from the vehicle occupant when the vehicle occupant gets in or out. This reduces the load input from the occupant to the portion of the front panel 24 that is forward of the protrusion 52 (the movable portion 50) when the vehicle occupant gets in or out.

[0042] Furthermore, in this embodiment, in a side view of the seat with the dummy H seated on the seat cushion 12, when the first line HL1 is rotated around the hip point H1 toward the front panel 24, the shape and dimensions of the front panel 24 are set so that the first line HL1 first comes into contact with the protruding portion 52. In this configuration, compared to a configuration in which the shape and dimensions of the front panel 24 are set to a different shape and dimensions from those described above, the load from the vehicle occupant when the vehicle occupant gets in or out can be more reliably received by the protruding portion 52. This makes it possible to reduce the load input from the vehicle occupant to a portion of the front panel 24 that is forward of the protruding portion 52 (the movable portion 50) when the vehicle occupant gets in or out.

[0043] Furthermore, in this embodiment, in a side view of the seat with the dummy H seated on the seat cushion 12, the protrusion 52 is located rearward of the center between the hip point H1 and the knee joint center H2 on the first line HL1. In this configuration, the protrusion 52 can more reliably bear the load from the vehicle occupant when the vehicle occupant gets in or out, compared to a configuration in which the protrusion 52 is located at a different position from the above. This reduces the load input from the vehicle occupant to a portion of the front panel 24 that is forward of the protrusion 52 (the movable portion 50) when the vehicle occupant gets in or out.

[0044] In addition, in this embodiment, when the dummy H is seated on the seat cushion 12, the protrusion 52 is located on the outer side in the seat width direction relative to the dummy H. This configuration can reduce the foreign body sensation of the protrusion 52 when seated.

[0045] Furthermore, in this embodiment, the first load input portion P1, which is the tip of the protruding portion 52 in the protruding direction, is located rearward with respect to the rotation center of the supported portion 36. In this configuration, the load from the vehicle occupant when the occupant gets in or out of the vehicle can be more reliably received by the protruding portion 52, compared to a configuration in which the tip of the protruding portion 52 in the protruding direction is located forward with respect to the rotation center of the supported portion 36. This makes it possible to reduce the load input from the occupant to a portion of the front panel 24 that is forward of the protruding portion 52 (movable portion 50) when the occupant gets in or out of the vehicle.

[0046] In this embodiment, an example has been described in which the position of the second load input portion P2 is set below the contact line L1, but the present invention is not limited to this. Whether or not to set the position of the second load input portion P2 below the contact line L1 can be determined appropriately taking into account the shape of the door opening of the vehicle, the posture of the vehicle occupants when getting in and out of the vehicle, etc.

[0047] Furthermore, in this embodiment, an example has been described in which the front panel 24 is set as described above using the dummy H, but the present invention is not limited to this. Whether or not to set the front panel 24 as described above can be determined appropriately taking into consideration the allowable value of the load input to the front panel 24, etc.

[0048] In addition, in the present embodiment, an example has been described in which the first load input portion P1, which is the tip of the protruding portion 52 in the protruding direction, is located on the rear side with respect to the rotation center of the supported portion 36, but the present invention is not limited to this. For example, a configuration in which the tip of the protruding portion 52 in the protruding direction is located on the front side with respect to the rotation center of the supported portion 36 may also be used.

[0049] Furthermore, in this embodiment, the vehicle seat 10 is described as being equipped with the tilt mechanism 18 and the length adjustment mechanism 20, but the present invention is not limited to this. For example, the configuration of the present invention can also be applied to a vehicle seat that is not equipped with the tilt mechanism 18 or the length adjustment mechanism 20.

[0050] In addition, in the present embodiment, an example in which the protrusion 52 is provided on the front panel 24 has been described, but the present invention is not limited to this. The protrusion 52 may be provided in a rear portion on the outer side in the seat width direction of a connecting member that is hung in the left-right direction between the pair of left and right side frames 22.

[0051] The above describes one embodiment of the present invention, but the present invention is not limited to the above, and it goes without saying that it can be implemented in various other modified forms within the scope of the gist of the present invention. [Explanation of symbols]

[0052] 10 Vehicle seats 12 seat cushions 22 Side frame 24 Front panel (hanging member) 36 Supported part 50 Moving parts 52 Protrusion P1 First load input section P2 Second load input section L1 contact line

Claims

1. a pair of left and right side frames that constitute part of the framework of a seat cushion that supports the buttocks and thighs of a seated occupant from below the seat and are arranged at an interval in the left-right direction of the seat; a bridge member that is suspended between the pair of left and right side frames in the left-right direction of the seat and that supports the thighs of a seated occupant from below; Equipped with The vehicle seat has a rear portion of the connecting member on the outer side in the seat width direction, which forms a protrusion that protrudes upward from the side frame.

2. The rear portion of the connecting member is supported by the pair of left and right side frames so as to be rotatable about the left-right direction of the seat as an axial direction, and the connecting member is displaced relative to the pair of left and right side frames, thereby adjusting the position of the front end of the seat cushion in the up-down direction of the seat, a movable portion supported by the hanging member and displaced in the seat front-rear direction relative to the hanging member to adjust the length of the seat cushion in the seat front-rear direction, The vehicle seat according to claim 1 , wherein a portion of the connecting member that is above the seat with respect to the supported portion serves as the protruding portion.

3. When viewed from the side of the seat, an end portion of the protrusion on the seat rear side and the seat upper side serves as a first load input portion; an end portion of the movable portion on the seat front side and the seat upper side serves as a second load input portion; When a line that passes through the first load input portion and is drawn in a direction in which the movable portion is displaced relative to the hanging member is defined as a contact line, The vehicle seat according to claim 2, wherein the second load input portion is located below the contact line.

4. In a side view of the seat with an AM50 dummy as a seated occupant seated on the seat cushion, A line connecting the hip point and the center of the knee joint of the dummy is defined as a first line, a second line that is parallel to the first line and passes through the tip of the protrusion in the protruding direction; The vehicle seat according to claim 1 , wherein a portion of the connecting member that is forward of the protruding portion is positioned below the second line.

5. In a side view of the seat with the dummy seated on the seat cushion, 5. The vehicle seat according to claim 4, wherein the shape and dimensions of the hanging member are set so that when the first line is rotated around the hip point toward the hanging member, the first line first comes into contact with the protrusion.

6. In a side view of the seat with the dummy seated on the seat cushion, The vehicle seat according to claim 4, wherein the protruding portion is located rearward of the center of the first line between the hip point and the center of the knee joint.

7. 2. The vehicle seat according to claim 1, wherein, when an AM50 dummy serving as a seated occupant is seated on the seat cushion, the protrusion is located outward in a seat width direction relative to the dummy.

8. The vehicle seat according to claim 2, wherein a tip end of the protruding portion in a protruding direction is located rearward of a rotation center of the supported portion.

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