Vehicle seat

Abstract

To provide a vehicle seat having impact absorption performance.SOLUTION: A vehicle seat comprises: a seat cushion including a first side frame; a seat back including a second side frame; and an adjustment mechanism for adjusting inclination of the seat back with respect to the seat cushion. The adjustment mechanism includes a support member which is fastened to the first side frame by a first fastening member and a second fastening member, and a rotary shaft which is rotatably supported by the support ember, and is fastened to the second side frame, and further, comprises a plate bridged over the first fastening member and the second fastening member. The support member is so configured as to be acceptable for movement within a prescribed range with respect to the first side frame. The plate has a specific region of which deformation in a thickness direction is easier than other regions when a force for moving the support within the prescribed range is applied to the support member.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] Patent Documents 1 and 2 describe vehicle seats provided with L-shaped plates for shock absorption. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2013-527078 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-071799 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology of the present disclosure aims to provide a vehicle seat with impact absorbing performance. [Means for solving the problem]

[0005] A vehicle seat according to one embodiment of the disclosed technology comprises a seat cushion including a first side frame, a seat back including a second side frame, and an adjustment mechanism for adjusting the inclination of the seat back relative to the seat cushion, wherein the adjustment mechanism includes a support member fastened to the first side frame by a first fastening member and a second fastening member, and a pivot shaft rotatably supported on the support member and fixed to the second side frame, and further comprises a plate spanning the first fastening member and the second fastening member, wherein the support member is configured to allow movement within a predetermined range relative to the first side frame, and the plate has a specific region configured to deform more easily in the thickness direction than other regions when a force is applied to the support member to move the support member within the predetermined range. [Effects of the Invention]

[0006] According to the technology of the present disclosure, a vehicle seat having impact absorbing performance can be provided. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is an external perspective view showing a schematic configuration of a vehicle seat 100 according to one embodiment of the technology of the present disclosure. [Figure 2] FIG. 2 is a partially enlarged perspective view that schematically illustrates the internal configuration of the vehicle seat 100 shown in FIG. [Figure 3] FIG. 3 is a partially enlarged perspective view that schematically shows the internal configuration of the vehicle seat 100 shown in FIG. 1, as seen from a different direction than FIG. [Figure 4] FIG. 4 is a schematic diagram of the main part near the rear end of the right side frame 11R as viewed from the left side. [Figure 5] FIG. 5 is a perspective view showing the main part near the rear end of the right side frame 11R. DETAILED DESCRIPTION OF THE INVENTION

[0008] FIG. 1 is an external perspective view showing a schematic configuration of a vehicle seat 100 according to an embodiment of the technology of the present disclosure. Vehicles in this specification include automobiles, airplanes, trains, mobile drones, ships, and the like. In the following description, the direction in front of an occupant sitting in the vehicle seat 100 in a normal posture is referred to as the forward direction Fr, and the direction opposite to the forward direction Fr is referred to as the rearward direction Rr, collectively referred to as the front-rear direction. Furthermore, the right side of the occupant when viewed from behind is referred to as the right direction R, and the left side of the occupant is referred to as the leftward direction L, collectively referred to as the left-right direction. Furthermore, the direction perpendicular to the front-rear direction and the left-right direction, and extending from the headrest toward the seat cushion, is referred to as the downward direction D, and the direction opposite to the downward direction D is referred to as the upward direction U, collectively referred to as the up-down direction. The front-rear direction, left-right direction, and up-down direction intersect with each other.

[0009] The vehicle seat 100 includes a seat cushion 1 that supports the buttocks and thighs of an occupant, and a seat back 2 that supports the lumbar region and back of the occupant. In the example of Fig. 1, the vehicle seat 100 is a driver's seat or a passenger's seat of an automobile.

[0010] The seat cushion 1 has a cushion frame 11 (see FIGS. 2 and 3) that forms a skeleton. The cushion frame 11 is covered with a pad (not shown) made of a relatively soft resin foam material such as urethane foam, and is further covered with a trim cover (not shown) that includes a covering material such as leather, woven fabric, or nonwoven fabric.

[0011] The seat back 2 has a back frame 21 (not shown) (see FIGS. 2 and 3) that forms a skeleton. The back frame 21 is covered with a pad (not shown) made of a relatively soft resin foam material such as urethane foam, and is further covered with a trim cover (not shown) that includes a covering material such as leather, woven fabric, or nonwoven fabric.

[0012] The vehicle seat 100 is fixed to the vehicle floor F and includes a pair of rail mechanisms 3 located directly below the seat cushion 1, and a foot bracket (not shown) positioned between the rail mechanisms 3 and the vehicle floor F and supporting the seat cushion 1 from below via the rail mechanisms 3.

[0013] The rail mechanism 3 is positioned directly below the seat cushion 1 to support the seat cushion 1 and is capable of moving the seat cushion 1 in the front-rear direction. The rail mechanism 3 has two long rails that extend in the front-rear direction, specifically a lower rail 31 that serves as a fixed rail and an upper rail 32 that serves as a movable rail. The upper rail 32 is capable of sliding (moving) together with the seat cushion 1 supported on its upper surface in the longitudinal direction of the lower rail 31 (i.e., the front-rear direction).

[0014] Fig. 2 is a partially enlarged perspective view schematically showing the internal configuration of the vehicle seat 100 shown in Fig. 1. Fig. 2 shows a state in which the pad and trim cover of the seat cushion 1 and the pad and trim cover of the seat back 2 have been removed. Fig. 3 is a partially enlarged perspective view schematically showing the internal configuration of the vehicle seat 100 shown in Fig. 1, seen from a different direction than Fig. 2.

[0015] The cushion frame 11 of the seat cushion 1 includes a left side frame 11L and a right side frame 11R that are arranged side by side in the left-right direction and extend in the front-rear direction. In the example of Figures 2 and 3, the left side frame 11L and the right side frame 11R are each a plate-like frame that is thick in the left-right direction.

[0016] The back frame 21 of the seat back 2 includes a left side frame 21L and a right side frame 21R that are arranged side by side in the left-right direction and extend in the up-down direction. In the example of Figures 2 and 3, the left side frame 21L and the right side frame 21R are each a plate-like frame that is thick in the left-right direction.

[0017] The vehicle seat 100 includes a reclining device 5 that adjusts the inclination of a seat back 2 relative to a seat cushion 1, and a seat lifter device 6 that adjusts the vertical height of the seat cushion 1. The seat lifter device 6 includes a parallel link mechanism, and includes a left rear link member 61L provided on the left rear, a right rear link member 61R provided on the right rear, a left front link member 62L provided on the left front, a right front link member 62R provided on the right front, and a cylindrical torque rod 60 made of a pipe or the like that rotatably passes through through holes that are formed in the rear end of the left side frame 11L and the rear end of the right side frame 11R and that penetrate laterally.

[0018] The left rear link member 61L has a lower end rotatably connected to the riser 71L via a hinge pin or the like, and an upper end connected to the left end of the torque rod 60. As shown in FIG. 3, a manual operation unit 64 for manually operating the seat lifter device 6 is fixed to the left side surface of the left side frame 11L. The manual operation unit 64 can also be changed to a motor that is activated by operating an operation button or the like (not shown). The power of the manual operation unit 64 and the motor can be transmitted to the left rear link member 61L.

[0019] The right rear link member 61R has a lower end rotatably connected to the riser 71R via a hinge pin or the like, and an upper end connected to the right end of the torque rod 60.

[0020] The left front link member 62L has a lower end rotatably connected to a riser 72L via a hinge pin or the like, and an upper end rotatably connected to the front end of the left side frame 11L.

[0021] The right front link member 62R has a lower end rotatably connected to a riser 72R via a hinge pin or the like, and an upper end rotatably connected to the front end of the right side frame 11R.

[0022] The reclining device 5 includes a pair of left and right base plates 51 fastened to the rear end portions of the left side frame 11L and the right side frame 11R by a first fastening member V1 consisting of a bolt, nut, etc., and a second fastening member V2 consisting of a bolt, nut, etc., and a rotating shaft 52 rotatably supported on the base plates 51 and fixed to the back frame 21.

[0023] The base plate 51 is shaped like a plate having a thickness in the left-right direction. The rotation shaft 52 extends in the left-right direction, and both ends 52A of the rotation shaft 52 are supported by the pair of base plates 51 so as to be rotatable.

[0024] The left and right base plates 51 are configured to be able to move within a predetermined range relative to the left side frame 11L and the right side frame 11R, respectively. When a rear impact occurs to a vehicle carrying the vehicle seat 100, a downward force is applied to the back frame 21 and the base plate 51 connected thereto via the pivot shaft 52. When such a force is applied, the base plate 51 is configured to be able to move slightly downward. The movement of the base plate 51 moves the seat back 2 downward, thereby mitigating the impact.

[0025] The nuts of the first fastening member V1 and the second fastening member V2 may be either square nuts or round nuts, but are preferably round nuts.

[0026] The vehicle seat 100 further includes an impact absorbing plate 70 that spans the first fastening member V1 and the second fastening member V2 of each of the pair of base plates 51.

[0027] The impact absorbing plate 70 is shaped like a plate with a thickness in the left-right direction. It is preferable that the impact absorbing plate 70 have a uniform thickness. The left impact absorbing plate 70 is fastened to the inner surface of the rear end portion of the left side frame 11L by a first fastening member V1 and a second fastening member V2. The right impact absorbing plate 70 is fastened to the inner surface of the rear end portion of the right side frame 11R by a first fastening member V1 and a second fastening member V2.

[0028] Fig. 4 is a schematic diagram of the main parts near the rear end of the right side frame 11R as viewed from the left side. Fig. 5 is a perspective view showing the main parts near the rear end of the right side frame 11R. Note that the configuration of the left side frame 11L and the base plate 51 and impact absorbing plate 70 fastened thereto is similar to the configuration of the right side frame 11R and the base plate 51 and impact absorbing plate 70 fastened thereto, and therefore a description thereof will be omitted.

[0029] As shown in Figures 4 and 5, the impact absorbing plate 70 comprises a base portion 71 extending from the fastening point by the first fastening member V1 to the fastening point by the second fastening member V2, and an extension portion 72 extending from the end of the base portion 71 on the first fastening member V1 side.

[0030] The extension portion 72 extends in a direction intersecting the direction in which the base portion 71 extends (which is synonymous with the direction in which the first fastening member V1 and the second fastening member V2 are arranged side by side).

[0031] The right side frame 11R has through holes for passing the bolts of the first fastening member V1 and the second fastening member V2. The through hole through which the bolt of the second fastening member V2 is inserted is circular and has an inner diameter small enough that the bolt cannot move radially inside. On the other hand, the through hole 110 through which the bolt of the first fastening member V1 is inserted is an elongated hole, so that the bolt can move in the longitudinal direction X inside when a strong downward force is applied to the base plate 51. In this way, the base plate 51 is fastened to the right side frame 11R so that when a large force is applied in the downward direction D, the fastening point of the first fastening member V1 can move along the longitudinal direction X of the through hole 110, with the fastening point of the second fastening member V2 as a fulcrum.

[0032] 4, the through hole 110 extends in a direction intersecting at an angle of approximately 90 degrees with the direction in which the base portion 71 extends. The through hole 110 has a region that extends downward D and forward Fr from a region through which the bolt of the first fastening member V1 is inserted.

[0033] The extension portion 72 of the impact absorbing plate 70 extends along the longitudinal direction X of the through-hole 110, i.e., the direction in which the base plate 51 is movable. In the example of FIG. 4, the extension portion 72 extends downward in a direction intersecting the extension direction of the base portion 71 at an angle of approximately 90 degrees. A tip portion 72S of the extension portion 72 is fixed to the inner surface of the right side frame 11R by welding, adhesive, or the like. The impact absorbing plate 70 is provided with a specific region 72A that is configured to deform more easily in the thickness direction than other regions when a force that moves the base plate 51 as described above is applied to the base plate 51.

[0034] As shown in FIG. 5, the extension portion 72 has a substantially uniform thickness. The specific region 72A includes a bulging portion 72B that is provided between the base end and the tip end 72S of the extension portion 72 and bulges in the thickness direction of the extension portion 72. The bulging portion 72B bulges in a direction away from the right side frame 11R (leftward direction L). The bulging portion 72B is provided between the fastening point of the first fastening member V1 and the tip end 72S fixed to the right side frame 11R. Therefore, when the first fastening member V1 moves in the longitudinal direction X in FIG. 4, a compressive force acts on the extension portion 72 in the longitudinal direction X. When the extension portion 72 is compressed, the specific region 72A where the bulging portion 72B is provided is likely to bend in the bulging direction. In this way, when a force that moves the base plate 51 as described above is applied to the base plate 51, the specific region 72A of the impact absorbing plate 70 can be deformed preferentially over other regions.

[0035] When a force is applied to the base plate 51, the first fastening member V1 moves within the through-hole 110 while buckling the specific region 72A in a direction away from the right side frame 11R. According to the vehicle seat 100, the force applied to the base plate 51 is absorbed by the buckling of the specific region 72A, so that the movement of the base plate 51 can be made gentle.

[0036] As shown in FIG. 4, the bulging portion 72B is provided across the entire width of the extension portion 72, but by adjusting the bulging height, width, and bending R of the bulging portion 72B, it is possible to adjust the timing at which the bulging portion 72B deforms in the bulging direction in response to a force in the longitudinal direction X.

[0037] 4 and 5, the base plate 51 is provided with a hole 51A penetrating in the left-right direction. The impact absorbing plate 70 is provided with an insertion piece 71A that extends from a portion of the base 71 between the first fastening member V1 and the second fastening member V2 and is inserted into the hole 51A. The hole 51A and the insertion piece 71A are configured so that the inner surface of the hole 51A can abut against the insertion piece 71A as the first fastening member V1 moves in the longitudinal direction X. With this configuration, when the first fastening member V1 moves in the longitudinal direction X, the base plate 51 can be moved gently due to the engagement between the hole 51A and the insertion piece 71A.

[0038] As described above, this specification discloses the following matters. The following components and the like corresponding to the above-described embodiments are described in parentheses, but the present invention is not limited to these.

[0039] (1) a seat cushion (seat cushion 1) including first side frames (right side frame 11R, left side frame 11L); a seat back (seat back 2) including second side frames (right side frame 21R, left side frame 21L); an adjustment mechanism (recliner 5) for adjusting the inclination of the seat back relative to the seat cushion; The adjustment mechanism includes a support member (base plate 51) fastened to the first side frame by a first fastening member (first fastening member V1) and a second fastening member (second fastening member V2), and a rotating shaft (rotating shaft 52) ​​rotatably supported by the support member and fixed to the second side frame, The vehicle further includes a plate (impact absorbing plate 70) spanning the first fastening member and the second fastening member, the support member is configured to be able to move within a predetermined range relative to the first side frame, The vehicle seat (vehicle seat 100) has a specific region (specific region 72A) configured to deform more easily in the thickness direction than other regions when a force is applied to the support member to move the support member within the specified range.

[0040] According to (1), when a force that moves the support member is applied due to a rear impact on a vehicle carrying a vehicle seat, a specific region of the plate can be preferentially deformed in the thickness direction. This allows, for example, the direction of deformation of the plate to differ from the direction of movement of the plate associated with movement of the support member and fastening member. This configuration effectively distributes the force applied to the support member, allowing the support member, the adjustment mechanism connected to it, and the seat back to move gently while absorbing the impact.

[0041] (2) The vehicle seat according to (1), The plate has an extension portion (extension portion 72) extending from an end portion of one of the first fastening member and the second fastening member (first fastening member V1), The tip end (tip end 72S) of the extension portion is fixed to the first side frame, The vehicle seat, wherein the specific area is provided on the extension portion.

[0042] According to (2), for example, when a force acts to move the support member with the fastening point of the other of the first and second fastening members as a fulcrum, by providing the extension portion along the direction of the movement, it is possible to gently move the fastening point of one of the first and second fastening members while deforming the specific area provided on the extension portion in its thickness direction. As a result, it is possible to absorb the impact while gently moving the support member, the adjustment mechanism connected to it, and the seat back.

[0043] (3) The vehicle seat according to (2), the support member is configured to be movable within the predetermined range with the other fastening point of the first fastening member and the second fastening member (the point fastened by the second fastening member V2) as a fulcrum, The extension portion is provided to extend along a direction in which the support member is movable (longitudinal direction X).

[0044] According to (3), when a force acts to move the support member using the other fastening point of the first fastening member and the second fastening member as a fulcrum, the specific area provided in the extension portion can be deformed in its thickness direction, and one of the fastening points of the first fastening member and the second fastening member can be moved gently.

[0045] (4) The vehicle seat according to (2) or (3), The specific region is configured to include a bulging portion (bulging portion 72B) that bulges in the thickness direction of the extension portion.

[0046] According to (4), the specific region can be easily deformed in the direction in which the bulging portion bulges.

[0047] (5) A vehicle seat according to any one of (2) to (4), The plate has an insertion piece (insertion piece 71A) between the first fastening member and the second fastening member that is inserted into a hole (hole 51A) formed in the support member, in this vehicle seat.

[0048] According to (5), the movement of the support member can be made even more gentle by the engagement between the insertion piece and the hole.

[0049] (6) A vehicle seat according to any one of (2) to (5), The vehicle seat, wherein one of the first fastening member and the second fastening member includes a round nut.

[0050] According to (6), the distance between the fastening point of one of the first fastening member and the second fastening member and the fixing point of the extension portion to the first side frame can be made constant, so that the specific area can be deformed in the intended shape regardless of the fastening state of the fastening members. [Explanation of symbols]

[0051] 1 seat cushion 2 seat backs 3 Rail mechanism 5 Reclining device 6 Seat lifter device 11 Cushion Frame 11L, 21L left side frame 11R, 21R right side frame 21 Back Frame 31 Lower rail 32 Upper rail 51 base plate 51A Hole 52 Rotating shaft 52A both ends 60 Torque rod 61L Left rear link member 61R Right rear link member 62L Left front link member 62R Right front link member 64 Manual operation section 70 Shock absorbing plate 71 Base 71A Insertion piece 71L, 71R, 72L, 72R risers 72 Extension part 72A Specific area 72B Bulge 72S tip 100 Vehicle seats 110 Through hole V1 First fastening member V2 Second fastening member

Claims

1. a seat cushion including a first side frame; a seat back including a second side frame; an adjustment mechanism that adjusts the inclination of the seat back relative to the seat cushion, the adjustment mechanism includes a support member fastened to the first side frame by a first fastening member and a second fastening member, and a rotation shaft rotatably supported by the support member and fixed to the second side frame, The apparatus further includes a plate spanning the first fastening member and the second fastening member, the support member is configured to be able to move within a predetermined range relative to the first side frame, The plate has a specific region configured to deform more easily in the thickness direction than other regions when a force is applied to the support member to move the support member within the specified range.

2. 2. The vehicle seat according to claim 1, the plate has an extension extending from one end of the first fastening member and the second fastening member, a tip end of the extension portion is fixed to the first side frame, The specific area is provided on the extension portion.

3. 3. The vehicle seat according to claim 2, the support member is configured to be movable within the predetermined range with the other fastening point of the first fastening member and the second fastening member as a fulcrum, The extension portion is provided to extend along a direction in which the support member is movable.

4. The vehicle seat according to claim 2 or 3, The specific region includes a bulging portion that bulges in a thickness direction of the extension portion.

5. 5. The vehicle seat according to claim 4, The vehicle seat, wherein the plate has an insertion piece between the first fastening member and the second fastening member, the insertion piece being inserted into a hole formed in the support member.

6. 6. The vehicle seat according to claim 5, The vehicle seat, wherein one of the first fastening member and the second fastening member includes a round nut.

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