Vehicular seat

Abstract

To suppress a bracket from being deformed when a load generated accompanying collision of a vehicle is inputted, and suppress a range of adjusting a seat cushion from narrowing.SOLUTION: A vehicular seat comprises a seat cushion 12, a lifter device 16 that adjusts a position of the seat cushion, a bracket 22 and a deformation suppressing member 30. The bracket 22 comprises a bottom wall part 22A arranged to oppose to a portion of the seat cushion 12, and a right-side wall part 22B, formed integrally with the bottom wall part 22A, to which a load generated accompanying collision of a vehicle is inputted. The deformation suppressing member 30 is arranged along the right-side wall part 22B to suppress the right-side wall part 22B from deforming with respect to the bottom wall part 22A. Further, the deformation suppressing member 30 is displaced toward the bottom wall part 22A when the portion of the seat cushion 12 is displaced toward the bottom wall part 22A accompanying operation of the lifter device 16.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] The following Patent Document 1 discloses an automobile seat in which a side frame and a portion of a seat belt anchor bracket are arranged opposite each other in the vertical direction of the seat so that the side frame of the seat cushion can be supported by part of the seat belt anchor bracket in the event of a rear-end collision of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-214329 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the automobile seat described in the above Patent Document 1 is equipped with a mechanism for adjusting the height of the seat cushion in the vertical direction of the seat. Therefore, if the side frame and a part of the seat belt anchor bracket are arranged to face each other in the vertical direction of the seat so that the side frame can be received by a part of the seat belt anchor bracket during a rear-end collision of the vehicle, it is considered that the adjustment range of the seat cushion height in the vertical direction of the seat will be narrowed.

[0005] The present invention takes into consideration the above-mentioned facts and aims to provide a vehicle seat that can suppress deformation of the bracket when a load associated with a vehicle collision is input, and can also suppress the narrowing of the adjustment range of the seat cushion. [Means for solving the problem]

[0006] The vehicle seat of the first embodiment comprises a seat cushion that supports the occupant's buttocks from the underside of the seat, a seat adjustment unit that adjusts the position of the seat cushion by operating, a bracket having an opposing portion arranged opposite a portion of the seat cushion, and a load input portion that is formed integrally with the opposing portion and into which a load associated with a vehicle collision is input, and a deformation suppression member that is arranged along the load input portion to suppress deformation of the load input portion relative to the opposing portion, and that displaces toward the opposing portion when a portion of the seat cushion is displaced toward the opposing portion by operating the seat adjustment unit.

[0007] According to the vehicle seat of the first aspect, a load associated with a vehicle collision is input to the load input portion of the bracket. Here, the deformation suppression member is disposed along the load input portion of the bracket. Therefore, when a load associated with a vehicle collision is input to the load input portion, the deformation suppression member suppresses the deformation of the load input portion relative to the opposing portion. Also, when the seat adjustment portion is operated, the position of the seat cushion is adjusted. When a portion of the seat cushion is displaced toward the opposing portion of the bracket due to the operation of the seat adjustment portion, the deformation suppression member is displaced toward the opposing portion. This suppresses the deformation suppression member from preventing the portion of the seat cushion from displacing toward the opposing portion of the bracket. In this way, according to the vehicle seat of the first aspect, it is possible to suppress the deformation of the bracket when a load associated with a vehicle collision is input to the load input portion, and to suppress the narrowing of the adjustment range of the seat cushion.

[0008] The vehicle seat of the second aspect is the vehicle seat of the first aspect, further comprising a biasing member that returns the deformation suppression member to its original position when a portion of the seat cushion is displaced toward the opposite side to the opposing portion upon operation of the seat adjustment portion.

[0009] According to the vehicle seat of the second aspect, when a portion of the seat cushion is displaced toward the opposite side to the opposing portion due to operation of the seat adjustment portion, the biasing member returns the position of the deformation suppressing member to its original position (the position where the deformation suppressing member is disposed along the load input portion of the bracket). Thus, according to the vehicle seat of the second aspect, the position of the deformation suppressing member can be easily returned to its original position.

[0010] A vehicle seat of a third aspect is the vehicle seat of the second aspect, wherein the deformation suppression member is supported by the opposing portion via a hinge so as to be tiltable, and the biasing member is provided integrally with the hinge.

[0011] According to the vehicle seat of the third aspect, the biasing member is provided integrally with the hinge, which makes it unnecessary to form a portion to which the biasing member is locked on the bracket.

[0012] A fourth aspect of the vehicle seat is a vehicle seat of any one of the first to third aspects, in which the deformation suppression member is supported by the opposing portion via a hinge so as to be tiltable, a portion of the opposing portion is a hinge joint that protrudes relative to another portion of the opposing portion, and the hinge is joined to the hinge joint by welding.

[0013] According to the vehicle seat of the fourth aspect, a portion of the opposing portion of the bracket serves as a hinge joint portion that protrudes from the other portion of the opposing portion, which improves workability when joining the hinge to the hinge joint portion by welding.

[0014] A fifth aspect of the vehicle seat is a vehicle seat of the first or second aspect, wherein the deformation suppression member has an axis portion arranged along the opposing portion, and the axis portion is engaged with a cut-and-raised portion formed in the opposing portion, thereby supporting the deformation suppression member in a tiltable manner on the opposing portion.

[0015] According to the vehicle seat of the fifth aspect, the shaft portion of the deformation suppression member is engaged with the cut-and-raised portion formed on the opposing portion of the bracket, so that the deformation suppression member is tiltably supported on the opposing portion. This configuration makes it possible to eliminate the need for a hinge of a separate member for tiltably supporting the deformation suppression member on the opposing portion.

[0016] A vehicle seat of a sixth aspect is the vehicle seat of any one of the first to fifth aspects, wherein a belt anchor constituting a part of a seatbelt device is fixed to the load input portion.

[0017] According to the vehicle seat of the sixth aspect, deformation of the bracket caused by a load input from the belt anchor to the load input portion in the event of a vehicle collision can be suppressed by the deformation suppressing member.

[0018] A seventh aspect of the vehicle seat is a vehicle seat of any one of the first to sixth aspects, in which the seat adjustment portion is a lifter device that displaces a cushion frame that constitutes the skeleton of the seat cushion in the vertical direction of the seat, and a portion of the cushion frame is arranged opposite the opposing portion in the vertical direction of the seat.

[0019] According to the vehicle seat of the seventh aspect, when the lifter device is operated, the position of the seat cushion in the up-down direction of the seat is adjusted. When the seat cushion frame is displaced toward the opposing portion of the bracket due to the operation of the lifter device, the deformation suppression member is displaced toward the opposing portion. This prevents the deformation suppression member from hindering the displacement of the seat cushion frame toward the opposing portion of the bracket. In this way, according to the vehicle seat of the seventh aspect, it is possible to prevent the adjustment range of the seat cushion in the up-down direction of the seat from becoming narrow. Effect of the Invention

[0020] The vehicle seat of the present invention has the excellent effect of suppressing deformation of the bracket when a load associated with a vehicle collision is input, and also suppressing narrowing of the adjustment range of the seat cushion. [Brief description of the drawings]

[0021] [Figure 1] 1 is a side view that illustrates a vehicle seat according to an embodiment of the present invention; [Diagram 2] FIG. 4 is a perspective view showing the right rear bracket and its surroundings. [Diagram 3] FIG. 11 is a perspective view showing the right rear bracket and its surroundings, illustrating a state before the seat cushion is lowered. [Figure 4] 11 is a perspective view showing the right rear bracket and its surroundings, illustrating a state in which the seat cushion is midway lowering. FIG. [Diagram 5] 13 is a perspective view showing the right rear bracket and its surroundings when the seat cushion has been lowered. FIG. [Figure 6] FIG. 4 is a perspective view showing a hinge and a biasing member provided integrally with the hinge. [Figure 7] FIG. 13 is a perspective view showing a bracket provided with a hinge weld portion. [Figure 8] FIG. 2 is a perspective view showing a bracket and the like on which a cut-and-raised portion is formed. [Figure 9] 9 is a perspective view of a bracket etc. on which a cut-and-raised portion is formed, as viewed from the opposite side to that in FIG. 8. [Figure 10] 13 is a side view illustrating a process of attaching the deformation suppression member to the bracket. FIG. [Figure 11] 13 is a side view illustrating a process of attaching the deformation suppression member to the bracket. FIG. [Figure 12] 13 is a side view illustrating a process of attaching the deformation suppression member to the bracket. FIG. [Figure 13] 13 is a plan view illustrating a process of attaching the deformation suppression member to the bracket. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] A vehicle seat 10 according to an embodiment of the present invention will be described with reference to Figures 1 and 2. Note that the arrows FR, UP, RH, and LH shown in the figures indicate the front, upper, right, and left sides of the seat as seen by an occupant seated in the vehicle seat 10, respectively. Hereinafter, when the directions of front-rear, up-down, and left-right are simply used in the description, they refer to front-rear in the front-rear direction of the seat, up-down in the up-down direction of the seat, and left-right in the left-right direction of the seat, unless otherwise specified. The left-right direction of the seat coincides with the width direction of the seat.

[0023] 1, the vehicle seat 10 includes a seat cushion 12 that supports the buttocks of an occupant from below, and a seat back 14 that supports the back of the occupant from the rear side. The vehicle seat 10 also includes a lifter device 16 as a seat adjustment part that supports the seat cushion 12 so as to be displaceable in the up and down direction.

[0024] The seat cushion 12 includes a seat cushion frame 18 that forms the framework of the seat cushion 12. The seat cushion frame 18 includes a pair of left and right side frame portions 18A that are spaced apart in the left-right direction and extend in the front-rear direction.

[0025] The lifter device 16 includes two brackets 22 arranged at intervals in the front-rear direction and fixed to the left slide rail 20, and two brackets 22 arranged at intervals in the front-rear direction and fixed to the right slide rail 20. The lifter device 16 also includes two links 24 that vertically connect the two brackets 22 fixed to the left slide rail 20 to the left side frame portion 18A, and two links 24 that vertically connect the two brackets 22 fixed to the right slide rail 20 to the right side frame portion 18A. The lifter device 16 also includes a lifter drive unit (not shown). The lifter drive unit is operated manually or electrically, so that the four links 24 tilt in the vertical direction. This adjusts the vertical position of the seat cushion frame 18 relative to the seat slide rail 20, and adjusts the vertical position of the seat cushion 12.

[0026] 2 shows a bracket 22 fixed to the rear side of the right slide rail 20. As shown in this figure, the bracket 22 is formed by pressing a steel plate material, for example. The cross-sectional shape of the bracket 22 cut along the vertical and horizontal directions is a U-shaped cross-sectional shape with an open upper side. In detail, the bracket 22 includes a bottom wall portion 22A as an opposing portion fixed to the upper rail 20A of the slide rail 20, a right wall portion 22B as a load input portion extending upward from the right end of the bottom wall portion 22A, and a left wall portion 22C extending upward from the left end of the bottom wall portion 22A.

[0027] The bottom wall portion 22A extends in the front-rear and left-right directions with the thickness direction being the up-down direction. The bottom wall portion 22A is formed in a rectangular shape with the longitudinal direction being the front-rear direction when viewed from above. The front and rear ends of the bottom wall portion 22A are fixed to the upper rail 20A via fastening members 26. The bottom wall portion 22A is disposed opposite the right side frame portion 18A (see FIG. 1) in the up-down direction.

[0028] The right side wall portion 22B extends in the front-rear and up-down directions with the left-right direction being the thickness direction. The right side wall portion 22B has a rectangular shape when viewed from the left-right direction, with the vertical dimension gradually increasing from the front side to the rear side. A belt anchor 28, which constitutes a part of the seat belt device, is fixed to the rear end of the right side wall portion 22B.

[0029] The left side wall 22C extends in the front-rear and up-down directions with the left-right direction being the thickness direction, and extends parallel to the right side wall 22B. The shape of the left side wall 22C as viewed from the left-right direction is a pentagon with the vertical dimension of the center in the front-rear direction set to be larger than the vertical dimensions of the front end and rear end. The lower end of the link 24 is connected to the front-rear center of the left side wall 22C so as to be rotatable with the left-right direction as the axial direction.

[0030] The bracket 22 also includes a tongue-shaped biasing member locking portion 22D extending leftward from the front end portion of the right side wall portion 22B. A biasing member locking hole 22E is formed in the biasing member locking portion 22D.

[0031] A deformation suppressing member 30 is attached to the center of the bottom wall 22A in the front-rear direction. The deformation suppressing member 30 is formed by pressing a steel plate material, similar to the bracket 22. The deformation suppressing member 30 includes a rectangular plate-shaped substrate 30A extending in the left-right direction between the right side wall 22B and the left side wall 22C of the bracket 22. The deformation suppressing member 30 also includes a pair of left and right bent ends 30B that bend and extend from both left and right ends of the substrate 30A toward one side in the thickness direction of the substrate 30A. An urging member locking hole 30C is formed in one end (the upper end in the state shown in FIG. 2) in the center of the left-right direction of the substrate 30A. The other end (the lower end in the state shown in FIG. 2) in the center of the left-right direction of the substrate 30A is attached to the bottom wall 22A of the bracket 22 via a hinge 32. The rotation axis of the hinge 32 is oriented along the left-right direction, so that the deformation suppressing member 30 is capable of tilting in the up-down direction with the hinge 32 as the center of rotation.

[0032] A biasing member 34 is suspended between the bracket 22 and the deformation suppressing member 30. One end of the biasing member 34 is engaged with the biasing member locking hole 22E of the bracket 22, and the other end of the biasing member 34 is engaged with the biasing member locking hole 30C of the deformation suppressing member 30. As a result, the deformation suppressing member 30 is biased in a direction in which it rises upward relative to the bottom wall portion 22A of the bracket 22.

[0033] As described below, before the right side frame portion 18A presses against the deformation suppressing member 30, the deformation suppressing member 30 is raised upward relative to the bottom wall portion 22A of the bracket 22. The position of the deformation suppressing member 30 in this state is referred to as the standing position P. When the deformation suppressing member 30 is in the standing position P, a pair of left and right bent end portions 30B of the deformation suppressing member 30 are in contact with the bottom wall portion 22A of the bracket 22. This prevents the deformation suppressing member 30 from tilting forward from the standing position P.

[0034] (Actions and Effects of the Present Embodiment) Next, the operation and effects of this embodiment will be described.

[0035] As shown in FIG. 1, an occupant seated in a vehicle seat 10 can wear a seat belt that constitutes a part of a seat belt device. When a vehicle equipped with the vehicle seat 10 is involved in a frontal collision, the seat belt is pulled by the occupant, and the right side wall portion 22B of the bracket 22 is pulled upward, diagonally forward, and leftward via the belt anchor 28, as shown in FIG. 2. That is, the load from the occupant due to the frontal collision is input to the right side wall portion 22B of the bracket 22. Here, when the load from the occupant due to the frontal collision is input to the right side wall portion 22B of the bracket 22, it is considered that the bracket 22 is deformed so that the right side wall portion 22B moves upward, diagonally forward, and leftward. However, in this embodiment, a deformation suppressing member 30 located at the upright position P is provided between the right side wall portion 22B, the left side wall portion 22C, and the bottom wall portion 22A of the bracket 22. As a result, the deformation suppressing member 30 resists the above-mentioned deformation of the bracket 22. As a result, in this embodiment, it is possible to suppress deformation of the bracket 22 when a load accompanying a frontal collision of the vehicle is input.

[0036] 3 to 6 are perspective views corresponding to FIG. 2, in which the biasing member 34 and the like are omitted. As shown in FIG. 3, when the seat cushion 12 is positioned at the highest position in the vertical direction, the right side frame portion 18A is positioned above the bracket 22.

[0037] As shown in FIG. 4, when the seat cushion 12 is lowered by the operation of the lifter device 16, the right side frame portion 18A is lowered toward the bottom wall portion 22A of the bracket 22 and starts to enter between the right side wall portion 22B and the left side wall portion 22C. Then, when the right side frame portion 18A is further lowered toward the bottom wall portion 22A of the bracket 22, the right side frame portion 18A presses the deformation suppressing member 30 as shown in FIG. 5. This causes the deformation suppressing member 30 to tilt rearward from the standing position P (see FIG. 4), allowing the right side frame portion 18A to further lower. In this way, in this embodiment, the provision of the deformation suppressing member 30 can prevent the adjustment range of the seat cushion 12 from being narrowed.

[0038] Furthermore, when the seat cushion 12 rises in accordance with the operation of the lifter device 16, the right side frame portion 18A rises. At this time, as shown in Fig. 2, the position of the deformation suppressing member 30 can be returned to the standing position P by the restoring force of the biasing member 34. In this way, in this embodiment, the position of the deformation suppressing member 30 can be easily returned to its original position.

[0039] In the present embodiment, an example has been described in which the biasing member 34 for returning the deformation suppressing member 30 to its original position is suspended between the bracket 22 and the deformation suppressing member 30, but the present invention is not limited to this. For example, as shown in FIG. 6, a configuration may be used in which the biasing member 34 is integrally provided on a hinge 32. In this configuration, it is possible to eliminate the need to form a portion (biasing member locking portion 22D) on the bracket 22 where the biasing member 34 is locked. Also, a configuration may be used in which the biasing member 34 is not used by applying another mechanism for returning the deformation suppressing member 30 to its original position.

[0040] (Other bracket 22 configurations) Fig. 7 shows bracket 22 having a hinge joint 22F in which the center of bottom wall 22A in the front-rear direction projects upward relative to other parts of bottom wall 22A. Note that the same reference numerals are used for the parts of bracket 22 shown in Fig. 7 that correspond to those of bracket 22 (see Fig. 2) described above. This bracket 22 can improve the workability when joining hinge 32 (see Fig. 2) to the upper surface of hinge joint 22F by spot welding, arc welding, or the like.

[0041] (Configuration without hinge 32) Figures 8 and 9 show the bracket 22 and the deformation suppressing member 30 that are configured without using the hinge 32 (see Figure 2). Note that in the bracket 22 and the deformation suppressing member 30 shown in Figures 8 and 9, parts that correspond to the previously described bracket 22 and the deformation suppressing member 30 (see Figure 2) are given the same reference numerals as the parts that correspond to the previously described bracket 22 and the deformation suppressing member 30 (see Figure 2).

[0042] 8 and 9, a pair of left and right shafts 30D are formed at the lower end of the deformation suppressing member 30 when the deformation suppressing member 30 is located in the upright position P. These shafts 30D are formed in a rectangular column shape with the axial direction extending in the left-right direction.

[0043] In addition, a pair of left and right first cut-and-raised portions 22G and second cut-and-raised portions 22H are formed on the bottom wall portion 22A of the bracket 22 as cut-and-raised portions formed by cutting and raising a portion of the bottom wall portion 22A upward. The pair of left and right first cut-and-raised portions 22G are formed in a tongue shape extending toward the front side and are arranged with a gap in the left-right direction. The first cut-and-raised portion 22G is formed in a tongue shape extending toward the rear side and is arranged in the center between the pair of left and right first cut-and-raised portions 22G when viewed from above.

[0044] To attach the deformation suppression member 30 to the bracket 22, first, as shown in Figure 10, the pair of left and right first cut-and-raised portions 22G are deformed upward relative to the bottom wall portion 22A to form a space below the pair of left and right first cut-and-raised portions 22G in which the pair of left and right shaft portions 30D of the deformation suppression member 30 can be engaged.

[0045] Next, as shown in FIG. 11, the pair of left and right shaft portions 30D of the deformation suppressing member 30 are engaged with the pair of left and right first cut-and-raised portions 22G, respectively.

[0046] 12 and 13, the second cut-and-raised portion 22H is deformed upward relative to the bottom wall portion 22A, so that the rear end of the second cut-and-raised portion 22H faces the left-right central portion of the lower end of the deformation suppressing member 30 in the front-rear direction. This keeps the pair of left and right shaft portions 30D of the deformation suppressing member 30 engaged with the pair of left and right first cut-and-raised portions 22G, completing the assembly of the deformation suppressing member 30 to the bracket 22.

[0047] In the configuration described above, it is possible to eliminate the need to provide the hinge 32 (see FIG. 2) as a separate member for supporting the deformation suppressing member 30 on the bottom wall portion 22A of the bracket 22 so that the deformation suppressing member 30 can tilt.

[0048] In the above-described example, the configuration for suppressing deformation of the bracket 22 to which the anchor bracket 22 is fixed is described, but the present invention is not limited to this. The configuration of the present invention can also be applied to suppress deformation of a bracket to which a member different from the anchor bracket 22 is fixed.

[0049] Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and it is of course possible to implement the present invention in various other modified forms without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0050] 10 Vehicle seats 12 Seat cushion 16 Lifter device (seat adjustment part) 22 Bracket 22A Bottom wall (opposing part) 22B Right side wall section (load input section) 22F Hinge joint 22G First cut-and-raised part (cut-and-raised part) 22H Second cut-and-raised part (cut-and-raised part) 28 Belt anchor 30 Deformation suppression member 30D shaft 32 Hinge 34 Pressing member

Claims

1. a seat cushion that supports the buttocks of an occupant from below the seat; a seat adjustment unit that adjusts the position of the seat cushion by being actuated; a bracket having a facing portion disposed to face a portion of the seat cushion, and a load input portion formed integrally with the facing portion and receiving a load associated with a vehicle collision; a deformation suppression member that is disposed along the load input portion to suppress deformation of the load input portion relative to the opposing portion and that is displaced toward the opposing portion when a portion of the seat cushion is displaced toward the opposing portion in response to operation of the seat adjustment portion; A vehicle seat comprising:

2. The vehicle seat according to claim 1 , further comprising a biasing member that returns the deformation suppressing member to its original position when a portion of the seat cushion is displaced toward an opposite side from the opposing portion in response to operation of the seat adjustment portion.

3. The deformation suppression member is supported by the opposing portion via a hinge so as to be tiltable, 3. The vehicle seat according to claim 2, wherein the biasing member is provided integrally with the hinge.

4. The deformation suppression member is supported by the opposing portion via a hinge so as to be tiltable, A portion of the opposing portion is a hinge joint portion that protrudes relative to another portion of the opposing portion, 2. The vehicle seat according to claim 1, wherein the hinge is joined to the hinge joint by welding.

5. The deformation suppression member includes a shaft portion disposed along the opposing portion, The vehicle seat according to claim 1 , wherein the shaft portion is engaged with a cut-and-raised portion formed in the opposing portion, so that the deformation suppressing member is supported by the opposing portion in a tiltable manner.

6. 2. The vehicle seat according to claim 1, wherein a belt anchor constituting a part of a seat belt device is fixed to the load input portion.

7. The seat adjustment unit is a lifter device that displaces a cushion frame that constitutes a framework of the seat cushion in the seat up-down direction, 7. The vehicle seat according to claim 6, wherein the portion of the cushion frame is disposed opposite the opposing portion in the seat up-down direction.

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