Vehicle sheet

Abstract

To adjust a part on a seated-occupant side.SOLUTION: A vehicle seat 10 includes a seat cushion 12, a seat back 14, a to-be-adjusted portion 18, a first ratchet hinge 22, and a second ratchet hinge 24. The to-be-adjusted portion 18 is provided in the seat back 14 and is disposed facing a seated occupant. In addition, the first ratchet hinge 22 is coupled to a part of the to-be-adjusted portion 18, is allowed to rotate to one side and is restricted from rotating to the other side; and the to-be-adjusted portion 18 is displaced by the rotation to the one side. The second ratchet hinge 24 is coupled to another part of the to-be-adjusted portion 18, is allowed to rotate to one side and is restricted from rotating to the other side; and the to-be-adjusted portion 18 is displaced by the rotation to the one side.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 a vehicle seat that realizes a variety of adjustments to the seating posture of an occupant. In the vehicle seat described in this document, the cushion variable mechanism is operated to move the cushion main body in the seat vertical direction relative to the cushion side part and to rotate it around an axis along the seat width direction. This makes it possible to change not only the vertical position of the cushion main body relative to the cushion side part but also the inclination angle. In addition, in the vehicle seat described in this document, the back variable mechanism is operated to move the back main body in the seat front-rear direction relative to the back side part and to rotate it around an axis along the seat width direction. This makes it possible to change not only the vertical position of the back main body relative to the back side part but also the inclination angle. In this way, in the vehicle seat described in the following Patent Document 1, it is possible to adjust the part on the seated occupant side with the above-mentioned configuration. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6865591 Summary of the Invention [Problem to be solved by the invention]

[0004] In consideration of the above, an object of the present invention is to provide a vehicle seat that allows adjustment of a portion on the seated occupant's side. [Means for solving the problem]

[0005] The vehicle seat of the first embodiment comprises a seat cushion that supports the buttocks of a seated occupant from the underside of the seat, a seat back that supports the back of the seated occupant from the rear side of the seat, an adjustable part provided on at least one of the seat cushion and the seat back and positioned facing the seated occupant, a first ratchet hinge connected to a part of the adjustable part and allowing rotation to one side and restricting rotation to the other side, such that rotation to one side displaces the adjustable part, and a second ratchet hinge connected to another part of the adjustable part and allowing rotation to one side and restricting rotation to the other side, such that rotation to one side displaces the adjustable part.

[0006] In the vehicle seat of the first aspect, at least one of the seat cushion and the seat back is provided with an adjustable part. A first ratchet hinge and a second ratchet hinge are connected to the adjustable part. The first ratchet hinge and the second ratchet hinge are respectively rotated to displace the adjustable part. This allows the adjustable part, which is a part on the seated occupant side, to be adjusted.

[0007] The vehicle seat of the second aspect is the vehicle seat of the first aspect, further comprising a first dial connected to the first ratchet hinge and rotating to rotate the first ratchet hinge, and a second dial connected to the second ratchet hinge and rotating to rotate the second ratchet hinge.

[0008] In the vehicle seat of the second aspect, by rotating the first dial, the first ratchet hinge rotates and the adjustable part is displaced. Also, by rotating the second dial, the second ratchet hinge rotates and the adjustable part is displaced. In this way, in the vehicle seat of the second aspect, the adjustable part can be adjusted by operating the first dial and the second dial.

[0009] The vehicle seat of the third aspect is the vehicle seat of the first or second aspect, wherein, when viewed from the direction of rotation axes of the first ratchet hinge and the second ratchet hinge, the direction in which rotation of the first ratchet hinge is restricted is opposite to the direction in which rotation of the second ratchet hinge is restricted.

[0010] In the vehicle seat of the third aspect, the direction in which the rotation of the first ratchet hinge is restricted and the direction in which the rotation of the second ratchet hinge is restricted are opposite directions when viewed from the direction of the rotation axes of the first ratchet hinge and the second ratchet hinge. In this configuration, when the first ratchet hinge is rotated to one side, the second ratchet hinge can be prevented or suppressed from rotating to the other side. Also, when the second ratchet hinge is rotated to one side, the first ratchet hinge can be prevented or suppressed from rotating to the other side. Effect of the Invention

[0011] The vehicle seat according to the present invention has an excellent effect of allowing adjustment of a portion on the seated occupant's side. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a vehicle seat according to an embodiment of the present invention; [Diagram 2] 4 is a side view showing a schematic view of an adjustable portion and an adjustment mechanism. FIG. [Diagram 3] FIG. 2 is a side view illustrating a ratchet hinge. [Figure 4] 11A and 11B are schematic diagrams for explaining the operation of the adjustment mechanism. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A vehicle seat 10 according to this embodiment will be described with reference to Figures 1 to 4. 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 RH indicates the right side in the width direction of the seat, and the arrow LH indicates the left side in the width direction of the seat. In the following description, when the directions of front-rear, up-down, and left-right are used unless otherwise specified, 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 width direction of the seat.

[0014] 1, the vehicle seat 10 includes a seat cushion 12 that supports the buttocks of a seated occupant from below, a seat back 14 that supports the back of the seated occupant from the rear side, and a head rest 16 that supports the head of the seated occupant from the rear side. The seat back 14 is attached to the rear end of the seat cushion 12 and can be tilted in the front-rear direction. The head rest 16 is attached to the upper end of the seat back 14.

[0015] Here, the portion of the seat back 14 facing the back of the seated occupant in the front-rear direction is an adjustable portion 18 that can be adjusted to suit the posture, physique, etc. of the seated occupant. In addition, the seat back 14 is provided with an adjustment mechanism 20 that displaces the adjustable portion 18.

[0016] The adjustable part 18 is rectangular when viewed from the front and is formed in a block shape having a thickness in the front-rear direction. As an example, the adjustable part 18 is configured such that a pad covered with a skin material is attached to a member constituting the skeleton of the adjustable part 18.

[0017] 1 and 2, the adjustment mechanism 20 includes a first ratchet hinge 22 provided in the seat back 14, and a second ratchet hinge 24 provided in the seat back 14 and disposed below the first ratchet hinge 22. The adjustment mechanism 20 also includes a first dial 26 connected to the first ratchet hinge 22, and a second dial 28 connected to the second ratchet hinge 24. The adjustment mechanism 20 also includes a first link 30 connecting the first ratchet hinge 22 to an upper end of the adjustable portion 18, and a second link 32 and a third link 34 connecting the second ratchet hinge 24 to a lower end of the adjustable portion 18.

[0018] FIG. 3 is a diagram showing the first ratchet hinge 22 and the second ratchet hinge 24. As shown in this figure, the first ratchet hinge 22 and the second ratchet hinge 24 include a fixed part 36 fixed to a back frame constituting the skeleton of the seat back 14 (see FIG. 1), and a movable part 38 to which one end of the first link 30 and the second link 32 (see FIG. 2) is fixed. The first ratchet hinge 22 and the second ratchet hinge 24 also include a ratchet part 40 provided between the fixed part 36 and the movable part 38. In the first ratchet hinge 22 and the second ratchet hinge 24 of this embodiment, the movable part 38 can be rotated around the ratchet part 40 as the axis. This allows the movable part 38 to rotate relative to the fixed part 36. Here, inside the ratchet portion 40, a ratchet mechanism is provided for permitting rotation in one direction and restricting rotation in the other direction. As an example, in this embodiment, when the movable portion 38 is rotated in a range from 0° or more to a predetermined angle θ1 or less with respect to the fixed portion 36, the rotation of the movable portion 38 in the direction of the arrow C1 with respect to the fixed portion 36 is permitted, and the rotation of the movable portion 38 in the direction of the arrow C2 with respect to the fixed portion 36 is restricted. In addition, the operation of the ratchet mechanism is restricted by rotating the movable portion 38 to a range of a certain angle θ2 exceeding the predetermined angle θ1 with respect to the fixed portion 36. This makes it possible to rotate and displace the movable portion 38 in the direction of the arrow C2 with respect to the fixed portion 36. Then, the restriction on the operation of the ratchet mechanism is released by returning the movable portion 38 to the position of 0° with respect to the fixed portion 36. In the following description, "the first ratchet hinge 22 rotates" means that the movable part 38 rotates around the ratchet part 40 as the center of rotation relative to the fixed part 36. Similarly, "the second ratchet hinge 24 rotates" means that the movable part 38 rotates around the ratchet part 40 as the center of rotation relative to the fixed part 36. Furthermore, the rotation direction of the first ratchet hinge 22 and the second ratchet hinge 24 in the direction of the arrow C1 may be referred to as the "deployment direction C1."Furthermore, the rotation direction of the first ratchet hinge 22 and the second ratchet hinge 24 toward the direction of the arrow C2 may be referred to as the "locking direction C2."

[0019] 2, the first ratchet hinge 22 is provided in the seat back 14 with its rotation axis in the left-right direction. Here, the unfolding direction of the first ratchet hinge 22 is the clockwise direction when viewed from the left side, and the locking direction of the first ratchet hinge 22 is the counterclockwise direction when viewed from the left side.

[0020] The second ratchet hinge 24 is provided in the seat back 14 with its rotation axis in the left-right direction. The unfolding direction of the second ratchet hinge 24 is counterclockwise when viewed from the left side, and the locking direction of the second ratchet hinge 24 is clockwise when viewed from the left side.

[0021] 1 and 2, a first dial 26 and a second dial 28 are connected to the first ratchet hinge 22 and the second ratchet hinge 24, respectively. In this embodiment, the first dial 26 and the second dial 28 are disposed on the left side of the seat back 14. By rotating the first dial 26, the first ratchet hinge 22 rotates. By rotating the second dial 28, the second ratchet hinge 24 rotates.

[0022] 2, one end of the first link 30 is connected to the first ratchet hinge 22. The other end of the first link 30 is connected to the upper end of the adjustable part 18 so as to be rotatable with the left-right direction as the rotation axis direction.

[0023] One end of the second link 32 is connected to the second ratchet hinge 24. The other end of the second link 32 is connected to one end of the third link 34 so as to be rotatable about the left-right direction as the rotation axis direction. The other end of the third link 34 is connected to the lower end of the adjustable part 18 so as to be rotatable about the left-right direction as the rotation axis direction. Here, the length direction of the second link 32 and the length direction of the third link 34 are oriented in directions that intersect with each other. As a result, the range from one end of the second link 32 to the other side of the third link 34 is bent in an L-shape so as to be convex upward.

[0024] FIG. 4 is a diagram showing a schematic diagram of the adjustment mechanism 20. As shown in this diagram (also see FIG. 2), the center of rotation of the first ratchet hinge 22 is defined as a rotation joint A. The connection between the first link 30 and the upper end of the adjustable part 18 is defined as a rotation joint B. The center of rotation of the second ratchet hinge 24 is defined as a rotation joint C. The connection between the second link 32 and the third link 34 is defined as a rotation joint D. The connection between the third link 34 and the lower end of the adjustable part 18 is defined as a rotation joint E. In this embodiment, the distance L between the rotation joint A and the rotation joint B is defined as a distance L. AB and the distance L between rotation joint D and rotation joint E DE The distance L between the rotation joint D and the rotation joint E is set to be equal to the distance L between the rotation joint D and the rotation joint E. DE is the distance L between the rotation joint C and the rotation joint D. CD is set to a longer interval.

[0025] (Actions and Effects of the Present Embodiment) Next, the operation and effects of this embodiment will be described.

[0026] 1 and 2, when the first dial 26 is rotated in the unfolding direction C1, the first ratchet hinge 22 rotates in the unfolding direction C1. As a result, the first link 30 rotates clockwise as viewed from the left side about the first ratchet hinge 22 as the center of rotation, and the third link 34 rotates clockwise as viewed from the left side about the connection portion with the second link 32 as the center of rotation. As a result, the adjustable part 18 moves in parallel upward.

[0027] Here, the unfolding direction C1 of the first ratchet hinge 22 and the locking direction C2 of the second ratchet hinge 24 are the same direction as each other when viewed from the left side. In other words, the locking direction C2 of the first ratchet hinge 22 and the locking direction C2 of the second ratchet hinge 24 are opposite directions as viewed from the left side. Therefore, even if the first ratchet hinge 22 rotates in the unfolding direction C1 by rotating the first dial 26 in the unfolding direction C1, the second ratchet hinge 24 does not rotate in the locking direction C2. In this way, in this embodiment, when the first ratchet hinge 22 is rotated in the unfolding direction C1, it is possible to prevent or suppress the second ratchet hinge 24 from rotating in the locking direction C2.

[0028] On the other hand, when the second dial 28 is rotated in the unfolding direction C1, the second ratchet hinge 24 rotates in the unfolding direction C1. As a result, the second link 32 rotates counterclockwise as viewed from the left side about the second ratchet hinge 24 as the center of rotation, and the third link 34 rotates clockwise as viewed from the left side about the connection portion with the second link 32 as the center of rotation. As a result, the lower end of the adjustable part 18 is pushed forward by the second link 32 and the third link 34. As a result, the angle of the adjustable part 18 changes.

[0029] Here, the unfolding direction C1 of the second ratchet hinge 24 and the locking direction C2 of the first ratchet hinge 22 are the same direction as each other when viewed from the left side. In other words, the locking direction C2 of the first ratchet hinge 22 and the locking direction C2 of the second ratchet hinge 24 are opposite directions as viewed from the left side. Therefore, even if the second ratchet hinge 24 rotates in the unfolding direction C1 by rotating the second dial 28 in the unfolding direction C1, the first ratchet hinge 22 does not rotate in the locking direction C2. In this way, in this embodiment, when the second ratchet hinge 24 is rotated in the unfolding direction C1, it is possible to prevent or suppress the first ratchet hinge 22 from rotating in the locking direction C2.

[0030] As described above, in the vehicle seat 10 of this embodiment, the position and angle of the adjustable portion 18 can be adjusted by rotating the first dial 26 and the second dial 28 in the deployment direction C1, respectively.

[0031] In the present embodiment, an example has been described in which the locking direction C2 of the first ratchet hinge 22 and the locking direction C2 of the second ratchet hinge 24 are set in opposite directions, but the present invention is not limited to this. For example, depending on the configuration of the link connecting the first ratchet hinge 22 and the second ratchet hinge 24 to the adjustable portion 18, the locking direction C2 of the first ratchet hinge 22 and the locking direction C2 of the second ratchet hinge 24 may be set in the same direction.

[0032] In addition, in the present embodiment, an example has been described in which the first ratchet hinge 22 and the second ratchet hinge 24 are rotated by manually rotating the first dial 26 and the second dial 28, respectively, but the present invention is not limited to this. For example, the first ratchet hinge 22 and the second ratchet hinge 24 may be rotated using an electric actuator.

[0033] The configuration of the present invention can also be applied to a mechanism for adjusting an adjustable portion provided on the seat cushion 12 side.

[0034] 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]

[0035] 10 Vehicle seats 12 Seat cushion 14 Seat back 18 Adjusted part 22 First Ratchet Hinge 24 Second Ratchet Hinge 26 The First Dial 28 The Second Dial

Claims

1. a seat cushion that supports the buttocks of a seated occupant from below the seat; A seat back that supports the back of a seated occupant from the rear side of the seat; an adjustable portion provided on at least one of the seat cushion and the seat back and arranged to face a seated occupant; a first ratchet hinge that is connected to a part of the adjustable part, that is permitted to rotate in one direction and restricted to rotate in the other direction, and that displaces the adjustable part by rotating in one direction; a second ratchet hinge that is connected to another part of the adjustable part, that is permitted to rotate in one direction and restricted to rotate in the other direction, and that displaces the adjustable part by rotating in one direction; and A vehicle seat comprising:

2. a first dial coupled to the first ratchet hinge and configured to rotate the first ratchet hinge when rotated; a second dial coupled to the second ratchet hinge and configured to rotate the second ratchet hinge when rotated; The vehicle seat according to claim 1 , further comprising:

3. 3. The vehicle seat according to claim 1, wherein, when viewed from the direction of rotation axes of the first ratchet hinge and the second ratchet hinge, the direction in which rotation of the first ratchet hinge is restricted and the direction in which rotation of the second ratchet hinge is restricted are opposite directions.

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