Vehicle seats

Abstract

The objective is to provide a vehicle seat that easily satisfies the requirement of a minimum bending radius for cables when routing cables across the main back portion of the seat back and the movable back portion that can be used as an armrest. [Solution] In the vehicle seat 10, a cable 90 is stretched between the movable back frame 34, which constitutes the skeleton of the movable back section, and the movable striker 78. The movable striker 78 is displaced from the protruding position to the retracted position in conjunction with the rotation of the movable back frame 34 from the upright position to the tilted forward position, and the movable striker 78 is displaced from the retracted position to the protruding position in conjunction with the rotation of the movable back frame 34 from the tilted forward position to the upright position. This cable 90 has an annular routing section 90R that is routed in a ring shape within a part of the back body section located below the movable back section.

Description

Technical Field

[0001] The present invention relates to a vehicle seat in which a cable is routed in a seat back.

Background Art

[0002] In the vehicle seat disclosed in Patent Document 1 below, a cable for transmitting the operating force of a reclining device release lever is routed inside the seat back.

[0003] The vehicle seat disclosed in Patent Document 2 below is a rear seat of an automobile and includes a main seat and a sub-seat provided side by side in the seat width direction. In this vehicle seat, by tilting forward the seat back (back movable part) of the sub-seat with respect to the seat back (back main body part) of the main seat, the seat back of the back movable part can be used as an armrest.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] When a cable is routed inside a seat back as in the vehicle seat disclosed in Patent Document 1 above, it is necessary to satisfy the requirement for the minimum bending radius of the cable. In this regard, for example, in the seat back of the vehicle seat disclosed in Patent Document 2 above, when routing a cable across the back main body part and the back movable part, since there is little space for routing the cable, it may be difficult to satisfy the requirement for the minimum bending radius.

[0006] The present invention aims to provide a vehicle seat that makes it easier to satisfy the requirement of a minimum bending radius for cables when routing cables across the back body of the seat back and the movable back portion that can be used as an armrest. [Means for solving the problem]

[0007] A vehicle seat according to the first embodiment comprises a seat cushion on which an occupant sits, and a seat back that supports the occupant's back, wherein the seat back comprises a back body that constitutes the main body of the seat back, a back movable part that is rotatable between an upright position and a forward-tilted position relative to the back body and can be used as an armrest in the forward-tilted position, and a part of the back body is positioned below the seat, a locking device provided on the back movable part, and a mechanism provided on the back body that is rotatable between a protruding position that extends from the back body and a stored position that is stored in the back body relative to the back body The bag comprises a movable striker which is displaceable and engages with the locking device when the movable back part rotates to the upright position while in the protruding position, and a cable which is stretched between the movable back part and the movable striker and displaces the movable striker from the protruding position to the retracted position in conjunction with the rotation of the movable back part from the upright position to the tilted position, and displaces the movable striker from the retracted position to the protruding position in conjunction with the rotation of the movable back part from the tilted position to the upright position, and has an annular cable that is routed in an annular shape within a part of the bag body.

[0008] In the first embodiment of the vehicle seat, the back of the occupant seated on the seat cushion is supported by the seat back. This seat back comprises a back body that constitutes its main body and a back movable part that is rotatable between an upright position and a forward-tilted position relative to the back body. The back movable part can be used as an armrest in the forward-tilted position. A part of the back body is positioned below the seat where the back movable part is located. A locking device is provided on the back movable part, and a movable striker is provided on the back body. The movable striker is displaceable relative to the back body between a protruding position where it protrudes from the back body and a stored position where it is retracted into the back body. When the back movable part rotates to the upright position while the movable striker is in the protruding position, the locking device engages with the movable striker.

[0009] A cable is stretched between the movable back section and the movable striker. This cable displaces the movable striker from the protruding position to the retracted position in conjunction with the rotation of the movable back section from the upright position to the forward-tilted position. This cable also displaces the movable striker from the retracted position to the protruding position in conjunction with the rotation of the movable back section from the forward-tilted position to the upright position. This cable has an annular routing section that is routed in a ring shape within a part of the back body located below the seat of the movable back section. In this way, since the routing space for the annular routing section is located within a part of the back body located below the seat of the movable back section, it becomes easy to satisfy the requirement of a minimum bending radius for the annular routing section (i.e., the cable).

[0010] In the second embodiment of the vehicle seat, the back movable part rotates relative to the back body about a pivot axis provided at the lower end when the seat is in the upright position, and a locking part with a slit is provided at the lower end of the back movable part, and the inner wire of the cable is inserted into the slit and locked to the locking part.

[0011] In the second embodiment of the vehicle seat, as described above, the inner wire of the cable is inserted into the slit of the locking portion provided at the lower end of the movable back portion, and the inner wire is locked to the locking portion, i.e., the movable back portion. This makes it easier to lock the inner wire to the movable back portion.

[0012] In the third embodiment of the vehicle seat, in the first or second embodiment, a lumbar support portion is provided within a part of the back body portion, which constitutes part of the frame of the back body portion and supports the waist of the occupant, and the outer casing of the cable is secured to a bracket fixed to the lumbar support portion.

[0013] In the third embodiment of the vehicle seat, the outer casing of the cable is secured to a bracket fixed to a lumbar support portion that constitutes part of the frame of the back body, as described above. In this way, since the bracket to which the outer casing is secured is fixed to the lumbar support portion, the configuration can be simplified compared to the case in which a member for fixing the bracket is provided separately from the lumbar support portion. [Effects of the Invention]

[0014] As described above, with the vehicle seat according to the present invention, when routing a cable between the back body portion of the seat back and the movable back portion that can be used as an armrest, it becomes easier to satisfy the requirement of a minimum bending radius for the cable. [Brief explanation of the drawing]

[0015] [Figure 1] This is a side view showing a vehicle seat according to an embodiment. [Figure 2] This is a perspective view showing the frame of a vehicle seat according to an embodiment. [Figure 3] This is a front view showing a portion of the frame. [Figure 4] This is a perspective view showing the movable back portion of the seat back of a vehicle seat according to the embodiment. [Figure 5] This is an exploded perspective view showing the movable part of the back. [Figure 6] It is a perspective view showing a movable striker of a vehicle seat according to an embodiment, and is a view showing a state where the striker body is located at a protruding position. [Figure 7] It is a perspective view showing a movable striker of a vehicle seat according to an embodiment, and is a view showing a state where the striker body is located at a retracted position. [Figure 8] It is a perspective view showing a configuration of a peripheral member including an annular cable routing portion of a cable of a vehicle seat according to an embodiment. [Figure 9] It is a perspective view showing a part of a back movable portion. [Figure 10] It is a cross-sectional view showing a configuration around a lower end portion of a back movable portion as viewed from the left side of the seat. [Figure 11] It is a cross-sectional view showing a configuration around a lower end portion of a back movable portion as viewed from the front side of the seat. [Figure 12] It is a side view showing a seat back of a vehicle seat according to an embodiment, and is a view showing a state where the back movable portion is located at a standing position. [Figure 13] It is a side view showing a seat back of a vehicle seat according to an embodiment, and is a view showing a state where the back movable portion is located at a forward tilted position. [Figure 14] It is a side view showing a configuration around a lower end portion of a back movable portion, and is a view showing a state where the back movable portion is located at a standing position. [Figure 15] It is a side view showing a configuration around a lower end portion of a back movable portion, and is a view showing a state where the back movable portion is located at a forward tilted position.

Mode for Carrying Out the Invention

[0016] Hereinafter, a vehicle seat 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 15. In each figure, some reference numerals may be omitted for the sake of clarity of the drawing. Also, the arrows FR, LH, and UP appropriately shown in each figure indicate the front, left, and upper directions of the vehicle seat 10, respectively. Hereinafter, when simply explaining using the front-rear, left-right, and up-down directions, it shall indicate the directions with respect to the vehicle seat 10.

[0017] As shown in Figure 1, the vehicle seat 10 according to this embodiment comprises a seat cushion 14 on which the occupant sits, a seat back 16 that supports the occupant's back, and two headrests 18 that support the occupant's head. This vehicle seat 10 is a two-seater seat and constitutes the right and left-right central portions of a three-seater rear seat. To the left of this vehicle seat 10, a single-seater vehicle seat (not shown) is positioned.

[0018] The seat back 16 comprises a back body portion 20 that constitutes the main body of the seat back 16, and a back movable portion 22 positioned alongside the back body portion 20 on one side in the seat width direction (in this case, the left side). The lower central part 20A of the back, which is part of the back body portion 20, protrudes to the left from the lower part of the back body portion 20 and is positioned below the back movable portion 22. The back movable portion 22 is rotatable relative to the back body portion 20 between the upright position shown in Figure 1 and the forward-tilted position (see Figure 13). This back movable portion 22 can be used as an armrest in the forward-tilted position.

[0019] As shown in Figure 2, the frame 12 that constitutes the skeleton of the vehicle seat 10 includes a cushion frame 24 that constitutes the skeleton of the seat cushion 14, a back body frame 26 that constitutes the skeleton of the back body 20, and a back movable frame 34 that constitutes the skeleton of the back movable part 22.

[0020] The cushion frame 24 is constructed from, for example, metal pipes or metal plates, and has a roughly frame-like shape with the left-right direction as the longitudinal direction when viewed from above. Similarly, the back body frame 26 is constructed from, for example, metal pipes or metal plates, and has a roughly frame-like shape with the up-down direction as the longitudinal direction when viewed from behind. Similarly, the back movable frame 34 is constructed from, for example, metal pipes or metal plates, and has a roughly frame-like shape with the up-down direction as the longitudinal direction when viewed from behind.

[0021] Three hinge brackets 36, 38, and 40 are fixed to the rear of the cushion frame 24. The three hinge brackets 36, 38, and 40 are spaced apart in the left-right direction and extend upward from the rear of the cushion frame 24. Hinge bracket 36 is fixed to the right end of the rear of the cushion frame 24, hinge bracket 38 is fixed to the middle of the rear of the cushion frame 24 in the left-right direction, and hinge bracket 40 is fixed to the left end of the rear of the cushion frame 24.

[0022] The lower end of the back frame 26 is positioned between the hinge bracket 36 and the hinge bracket 38. The back frame 26 is connected to the hinge brackets 36 and 38 via a well-known reclining mechanism 44. Slightly below the vertical midpoint of the back frame 26, an intermediate frame 28 is provided that extends in the left-right direction. The intermediate frame 28 is made of, for example, a metal pipe and has an extension 28A that extends to the left side of the back frame 26.

[0023] A connecting bracket 42, which is constructed by joining two metal plates, is fixed to the left end of the extension 28A of the intermediate frame 28 by means of welding or other means. The connecting bracket 42 extends downward from the left end of the extension 28A. The lower end of the connecting bracket 42 is superimposed on the upper end of the hinge bracket 40 from the right side and is connected to the upper end of the hinge bracket 40 using a stepped bolt 46 and a nut (not shown). The stepped bolt 46 is arranged coaxially with the reclining mechanism 44 described above. When the lock of this reclining mechanism 44 is released, the back body frame 26, i.e., the back body 20, tilts in the front-rear direction relative to the cushion frame 24, i.e., the seat cushion 14. At this time, the connecting bracket 42 is configured to tilt integrally with the back body frame 26.

[0024] A connecting bracket 48 is provided at the right end of the extension 28A of the intermediate frame 28, paired with the connecting bracket 42. The connecting bracket 48 is made of, for example, a metal plate and is fixed to the right end of the extension 28A by means of welding or other means, and extends diagonally downward and forward from the extension 28A. Corresponding to this connecting bracket 48, a connecting portion 42A extending forward is provided at the upper end of the connecting bracket 42. As shown in Figures 2 and 3, the lower end of the back movable frame 34 is positioned between the connecting portion 42A of the connecting bracket 42 and the connecting bracket 48.

[0025] As shown in Figures 4 and 5, the back movable section 22, whose skeleton is formed by the back movable frame 34 described above, has a first pad 50 and a second pad 52 which are cushioning materials, a trim cover 54 which is a surface material, and a cup holder 56. The first pad 50 and the second pad 52 are made of a foam material such as urethane foam, and the back movable frame 34 is sandwiched between the first pad 50 and the second pad 52. When the back movable section 22 is in the forward-tilted position, the first pad 50 is positioned on the upper side of the back movable frame 34, and the second pad 52 is positioned on the lower side of the back movable frame 34.

[0026] An oval-shaped opening 58 is formed in the center of the first pad 50. A cup holder 56 is fitted into this opening 58. The cup holder 56 is fixed to a holder fixing part 34A provided on the back movable frame 34 by means of claw fitting or the like. A resin plate 60 made of resin is attached to one end of the first pad 50 and the second pad 52. When the back movable part 22 is in the upright position, this resin plate 60 is positioned at the lower end of the back movable part 22, and when the back movable part 22 is in the forward-tilted position, it is positioned at the rear end of the back movable part 22. A slit 62 is formed in the center of this resin plate 60.

[0027] The trim cover 54 is formed into a bag shape by sewing together multiple surface pieces made of, for example, fabric, leather, or synthetic leather, and covers the first pad 50, the second pad 52, and the back movable frame 34. The cup holder 56 is exposed through an opening 64 formed in the trim cover 54, and the resin plate 60 is exposed through an opening 66 formed in the trim cover 54. At the end of the back movable part 22 opposite to the resin plate 60, there is a pair of left and right headrest bushings 68 into which the stays of the headrest 18 are inserted. The left and right headrest bushings 68 are fixed to the back movable frame 34.

[0028] A pair of left and right rotating shafts 70 are provided at the end of the back movable frame 34 on the side facing the resin plate 60. The left and right rotating shafts 70 are arranged coaxially with the left-right direction as the axial direction. The back movable frame 34 is rotatably connected to the connecting portion 42A and the connecting bracket 48 of the connecting bracket 42 via the left and right rotating shafts 70. As a result, the back movable frame 34 (i.e., the back movable portion 22) is rotatable around the left and right rotating shafts 70 relative to the back main body frame 26 (i.e., the back main body portion 20).

[0029] Furthermore, a stopper pin 72 is fixed to the end of the back movable frame 34 on the side of the resin plate 60. The stopper pin 72 is made of, for example, a round metal bar and is positioned with the left-right direction as its axis. Both axial ends of the stopper pin 72 protrude from the back movable part 22 in the left-right direction, and these protruding parts engage with the connecting part 42A and connecting bracket 48 of the connecting bracket 42, thereby limiting the rotation range of the back movable part 22 to between the upright position and the forward-tilted position. When the back movable part 22 is in the upright position, the end of the back movable part 22 on the side of the resin plate 60 becomes the lower end of the back movable part 22, and when the back movable part 22 is in the forward-tilted position, the end of the back movable part 22 on the side of the resin plate 60 becomes the rear end of the back movable part 22.

[0030] As shown in Figures 2, 3, and 5, a locking device 74 is fixed to the end of the back movable frame 34 opposite to the resin plate 60. This locking device 74 corresponds to the movable striker 78 shown in Figures 2, 3, 6, and 7. The movable striker 78 has a fixed bracket 80 fixed to the upper left side of the back main frame 26 and a striker body 82 rotatably mounted to the fixed bracket 80.

[0031] The fixing bracket 80 is made of, for example, a press-formed metal plate and has a front wall 80A and a rear wall 80B that face each other in the front-rear direction, and a connecting wall 80C that connects the lower left ends of the front wall 80A and the rear wall 80B in the front-rear direction. This fixing bracket is fixed to the back movable frame 34 by means of, for example, welding.

[0032] The striker body 82 is composed of a bracket connecting portion 82A made of, for example, a press-formed metal plate, and a striker portion 82B made of, for example, a bent metal round bar. The striker portion 82B is roughly U-shaped and is fixed to the bracket connecting portion 82A by means of welding or other means. The bracket connecting portion 82A is connected to the fixed bracket 80 via a connecting shaft 84 that penetrates the front wall 80A and rear wall 80B of the fixed bracket 80 and the bracket connecting portion 82A. The connecting shaft 84 is positioned with its axis in roughly the front-rear direction, and the striker body 82 is rotatable around the connecting shaft 84 relative to the fixed bracket 80.

[0033] The striker body 82 described above is rotatable relative to the fixed bracket 80 between the protruding position shown in Figures 2, 3, and 6 and the retracted position shown in Figure 7. When the striker body 82 is in the retracted position, it is stored inside the back body 20. When the striker body 82 is in the protruding position, the striker portion 82B of the striker body 82 protrudes to the left from the left side of the back body 20. The striker body 82 is biased to the protruding position by a tension coil spring 86, which is a biasing member stretched between it and the fixed bracket 80.

[0034] When the striker body 82 is in the protruding position and the back movable part 22 rotates from the forward tilted position to the upright position, a latch 76 (see Figure 5) provided on the locking device 74 of the back movable part 22 catches on the striker part 82B. This configuration restrains (locks) the back movable part 22 in the upright position. A strap (not shown) is connected to the locking device 74, and when this strap is pulled, the latch 76 is released from its engagement with the striker part 82B.

[0035] As shown in Figures 6 and 7, a locking portion 81 is provided at the lower end of the front wall 80A of the fixed bracket 80, to which one end of the outer casing 92 of the cable 90 is locked. As shown in Figures 2 and 3, this cable 90 is stretched between the movable striker 78 and the back movable part 22. One end of the inner wire 94 of this cable 90 is locked to a locking portion 83 (see Figures 6 and 7) provided on the bracket connecting portion 82A of the striker body 82. This locking portion 81 is a part of the bracket connecting portion 82A that extends forward from the front wall 80A of the fixed bracket 80.

[0036] The cable 90 described above extends downward from the movable striker 78 within the bag body 20, and bends to the left slightly below the intermediate frame 28, and is routed within the lower central part 20A of the bag, which is part of the bag body 20. As shown in Figures 2, 3 and 8, a portion of the cable 90 routed within the lower central part 20A of the bag is routed in a ring shape as an annular routing section 90R.

[0037] Specifically, the cable 90, which is routed into the lower central part 20A of the back center, slightly below the intermediate frame 28 as described above, has a left extension 90R1 extending to the left at the top of the lower central part 20A of the back center, a lower extension 90R2 extending downward (bent downward) from the left end of the left extension 90R1, a right extension 90R3 extending to the right (bent to the right) from the lower end of the lower extension 90R2, and an upper extension 90R4 extending upward (bent upward) from the right end of the right extension 90R3. These lower extension 90R2, right extension 90R3, and upper extension 90R4 constitute the annular routing section 90R. The bending radius of this annular routing section 90R is set to, for example, 50 millimeters or more.

[0038] The other end of the outer casing 92 is provided at the vertical intermediate portion of the upper extension 90R4. The other end of the outer casing 92 is locked to the waist support portion 96, which constitutes part of the back body frame 26, via a bracket 100. The waist support portion 96 is formed, for example, by bending a round metal bar. This waist support portion 96 is fixed to the back plate 30 (see Figures 3 and 8), which constitutes part of the back body frame 26. The back plate 30 is made, for example, of a press-formed metal plate, and is a long plate with its longitudinal direction in the left-right direction and its thickness direction in the front-back direction, extending to the left from the left end of the back body frame 26. The left end of the back plate 30 is fixed to the upper part of the connecting bracket 42 by means of welding or other means.

[0039] The lumbar support portion 96 is roughly U-shaped when viewed in the front-to-back direction. The upper end of the lumbar support portion 96 is fixed to the back plate 30 by means of welding or other means. The lower end of the lumbar support portion 96 is bent forward and is configured to support the lumbar region (sacrum) of the occupant seated on the seat cushion 14 from the rear. The bracket 100, to which the other end of the outer casing 92 is locked, is made of, for example, a press-formed metal plate and is fixed to the lower right end of the lumbar support portion 96 by means of welding or other means.

[0040] The other end of the inner wire 94 extends upward from the other end of the outer casing 92. This other end of the inner wire 94 extends upward from the lower center 20A of the back and is locked to the lower end of the resin plate 60 side of the back movable part 22 (hereinafter referred to as the "lower end of the back movable part 22"). Specifically, as shown in Figure 9, the other end of the inner wire 94 is inserted through a slit 62 formed in the resin plate 60 and routed within the back movable part 22, and is locked to a locking part 102 fixed to the stopper pin 72 of the back movable frame 34.

[0041] The locking portion 102 described above is made of, for example, a press-formed metal plate and is fixed to the right side of the stopper pin 72 by means of welding or other means. As shown in Figures 10 and 11, a slit 104 is formed in the locking portion 102 through which the inner wire 94 is inserted, and the cable end 94A provided at the other end of the inner wire 94 catches on the locking portion 102. In this way, the other end of the inner wire 94 is locked to the locking portion 102.

[0042] In the vehicle seat 10 with the above configuration, when the movable back section 22 rotates from the upright position shown in Figure 12 to the forward-tilted position shown in Figure 13, the cable end 94A of the inner wire 94, which is locked to the locking section 102, is displaced from the position shown in Figure 14 to the position shown in Figure 15, causing the other end of the inner wire 94 to be pulled out by a predetermined amount from the other end of the outer casing 92. As a result, one end of the inner wire 94, which is locked to the striker body 82 of the movable striker 78, is pulled downward, and the striker body 82 rotates from the protruding position shown in Figure 6 to the retracted position shown in Figure 7. As a result, when the movable back section 22 is used as an armrest, the striker section 82B of the striker body 82 is retracted into the back body section 20.

[0043] Furthermore, when the back movable part 22 rotates from the forward-tilted position shown in Figure 13 to the upright position shown in Figure 12, the cable end 94A of the inner wire 94, which is locked to the locking part 102, is displaced from the position shown in Figure 15 to the position shown in Figure 14, causing the other end of the inner wire 94 to be pulled in by a predetermined amount toward the other end of the outer casing 92. As a result, one end of the inner wire 94, which is locked to the striker body 82 of the movable striker 78, is pulled upward, and the striker body 82 rotates from the stored position shown in Figure 7 to the protruding position shown in Figure 6. As a result, the latch 76 of the locking device 74 of the back movable part 22, which is rotating to the upright position, catches on the striker part 82B, and the back movable part 22 is locked in the upright position. Note that when the striker body 82 rotates to the protruding position as described above, the rotation of the striker body 82 to the protruding position is assisted by the tension coil spring 86 of the movable striker 78.

[0044] In the vehicle seat 10 with the above configuration, the back of the occupant seated on the seat cushion 14 is supported by the seat back 16. This seat back 16 comprises a back body 20 that constitutes its main body, and a back movable part 22 that is rotatable between an upright position and a forward-tilted position relative to the back body 20. The back movable part 22 can be used as an armrest in the forward-tilted position. Below the seat of this back movable part 22 is the lower central part 20A of the back, which is part of the back body 20.

[0045] The movable back section 22 is provided with a locking device 74, and the back body section 20 is provided with a movable striker 78. The striker body 82 of the movable striker 78 is rotatable relative to the back body section 20 between a protruding position where it protrudes from the back body section 20 and a retracted position where it is stored in the back body section 20. When the movable back section 22 rotates to the upright position while the striker body 82 is in the protruding position, the locking device 74 engages with the striker body 82.

[0046] A cable 90 is stretched between the back movable part 22 and the movable striker 78. This cable 90 displaces the striker body 82 from the protruding position to the retracted position in conjunction with the rotation of the back movable part 22 from the upright position to the forward-tilted position. This cable 90 also displaces the movable striker 78 from the retracted position to the protruding position in conjunction with the displacement of the back movable part 22 from the forward-tilted position to the upright position. This cable 90 has an annular routing section 90R that is routed in a ring shape within the lower central part 20A of the back located below the back movable part 22. In this way, since the lower central part 20A of the back, which is part of the back body 20 located below the back movable part 22, is used as the routing space for the annular routing section 90R, it becomes easy to satisfy the requirement of a minimum bending radius (e.g., 50 millimeters or more) for the annular routing section 90R (i.e., the cable 90).

[0047] Furthermore, in this vehicle seat 10, the movable back section 22 rotates relative to the back body section 20 around left and right rotation axes 70 provided at the lower end when the seat is in the upright position. The lower end of the movable back section 22 is provided with a locking section 102 having a slit 104, and the other end of the inner wire 94 of the cable 90 is inserted into the slit 104 and locked to the locking section 102. This configuration makes it easy to lock the inner wire to the movable back section 22.

[0048] Furthermore, in this vehicle seat 10, a lumbar support portion 96 is provided within the lower central part 20A of the back body portion 20, which is part of the frame of the back body portion 20 and supports the occupant's waist. The other end of the outer casing 92 of the cable 90 is secured to a bracket 100 fixed to the lumbar support portion 96. With this configuration, the structure can be simplified compared to a case where a member for fixing the bracket 100 is provided separately from the lumbar support portion 96.

[0049] In the above embodiment, the movable back portion 22 is arranged in line with the seat width direction relative to the back body portion 20, but this is not the only configuration. For example, the movable back portion may be fitted into a recess formed on the front surface of the back body portion.

[0050] Furthermore, although the above embodiment described a case in which the vehicle seat 10 constitutes the right portion and the left-right central portion of a three-seater rear seat, it is not limited to this. When the vehicle seat 10 according to the present invention constitutes the left portion and the left-right central portion of a three-seater rear seat, the configuration is symmetrical to that of the above embodiment.

[0051] Furthermore, although the above embodiment described the case in which the present invention is applied to a vehicle seat 10, the present invention is not limited to this and can also be applied to seats for vehicles other than vehicles (for example, aircraft and ships).

[0052] Furthermore, the present invention can be implemented with various modifications without departing from its spirit. Of course, the scope of the present invention is not limited to the embodiments described above. [Explanation of symbols]

[0053] 10 Vehicle seats 14 Seat Cushions 16 Seatback 20 Back main body 20A Lower center of the bag (part of the main body of the bag) 22 Back movable part 26. Back body frame (the skeleton of the back body) 70 Rotation axis 74 Locking device 78 Movable Striker 90 Cable 90R Annular Cable Distribution Section 92 Outer casing 94 Inner Wire 96 Lumbar support part 100 brackets 102 Locking part 104 Slits

Claims

1. The seat cushion on which the occupants sit, A seatback that supports the back of the occupant, Equipped with, The aforementioned seatback is The back body portion that constitutes the main body portion of the seat back, The aforementioned back body is rotatable between an upright position and a forward-tilted position, and can be used as an armrest in the forward-tilted position, and a part of the aforementioned back body is positioned below the seat as a back movable part, A locking device provided on the back movable part, A movable striker is provided on the bag body and is displaceable relative to the bag body between a protruding position where it protrudes from the bag body and a stored position where it is housed in the bag body, and when the movable part of the bag rotates to the upright position while in the protruding position, it engages with the locking device. A cable is provided that spans between the back movable part and the movable striker, and in conjunction with the rotation of the back movable part from the upright position to the forward-tilted position, displaces the movable striker from the protruding position to the retracted position, and in conjunction with the rotation of the back movable part from the forward-tilted position to the upright position, displaces the movable striker from the retracted position to the protruding position, and has an annular routing portion routed in a ring shape within a part of the back body, A vehicle seat equipped with [a specific feature / feature].

2. The aforementioned movable back portion rotates relative to the back body portion about a pivot axis provided at the lower end when it is in the upright position, The lower end of the aforementioned movable back portion is provided with a locking portion having a slit formed therein. The vehicle seat according to claim 1, wherein the inner wire of the cable is inserted into the slit and locked to the locking portion.

3. Within the aforementioned part of the main body of the bag, there is a lumbar support portion which constitutes part of the frame of the main body of the bag and supports the waist of the occupant. The vehicle seat according to claim 1 or 2, wherein the outer casing of the cable is secured to a bracket fixed to the lumbar support portion.

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