JP2019123379A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat having a high degree of freedom in a shape change, and realizing a highly strong seat skeleton with a simple structure.SOLUTION: A vehicle seat includes a plurality of triangular members 31 forming a back frame 21. Each triangular member 31 has a first side part 41, a first corner part 36, a second corner part 37, and a third corner part 38. The plurality of triangular members 31 are combined so as to rotatably connect the second corner part 37 and the third corner part 38 between the adjacent triangular members 31, and connect the first side parts 41 between the plurality of triangular members 31. The vehicle seat comprises: a wire 61 stretched between the first corner parts 36 of the adjacent triangular members 31, and connecting the adjacent triangular members 31; a take-up device 26 capable of adjusting a length of a wire 61 between the adjacent triangular members 31; and a lock device 66 capable of holding the length of the wire 61 between the triangular members 31 adjacent to each other.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a vehicle seat.

  With regard to the conventional vehicle seat, for example, Japanese Patent Application Laid-Open No. 2017-30621 (Patent Document 1) includes a seatback frame lower portion and a seatback frame upper portion mounted so as to be capable of tilting in the front-rear direction A foldable seat back is disclosed that includes a link mechanism and an actuator connected to the upper portion of the seat back frame and tiltingly driving the upper portion of the seat back frame.

Unexamined-Japanese-Patent No. 2017-30621

  As disclosed in the above-mentioned Patent Document 1, a vehicle seat provided with a mechanism for changing the skeletal shape of the seat is known.

  In such a vehicle seat, if it is attempted to increase the degree of freedom of the seat frame shape, the number of required actuators and the number of movable parts increase. In this case, the weight of the sheet may increase or the structure of the sheet may be complicated. In addition, it is required to increase the strength of the frame of the seat assuming that an excessive impact is externally applied to the vehicle seat.

  Therefore, an object of the present disclosure is to solve the above-described problems, and to provide a vehicle seat that achieves a high strength sheet skeleton with a high degree of freedom in shape change by a simple configuration. .

  The vehicle seat according to the present disclosure comprises a plurality of triangular members that form the framework of the seat. The triangular member has a first side, a first corner arranged diagonally to the first side, and a second corner and a third corner arranged at both ends of the first side. In the plurality of triangular members, the second corner and the third corner are rotatably connected to each other between the adjacent triangular members, and the first side is continuous between the plurality of triangular members. Be combined. The vehicle seat extends between the first corners of the adjacent triangular members, and the length of the connecting members between the adjacent triangular members can be adjusted. And a length holding mechanism configured to be able to hold the length of the connecting member between the triangular members adjacent to each other.

  According to the vehicle seat configured as described above, the shapes formed by the plurality of triangular members can be variously changed by relatively rotating the adjacent triangular members. Moreover, the truss structure which consists of several triangle members and a connection member can be provided in the frame | skeleton of a sheet | seat. Therefore, according to the present disclosure, it is possible to realize a high strength sheet skeleton with a high degree of freedom in shape change and a simple configuration.

  Also preferably, the connecting member is a flexible member which is flexible and is routed through the first corners of the plurality of triangular members.

  According to the vehicle seat configured in this way, the skeleton of the seat can be realized with a simpler configuration.

  Preferably, the vehicle seat further includes an urging member for urging the triangular member in a direction in which the first corners of the triangular members adjacent to each other are separated.

  According to the vehicle seat configured in this manner, the flexible member is tensioned by being biased by the biasing member. Thereby, the function as a truss structure of a flexible member can be improved, and the intensity of frame of a sheet can be raised more effectively.

  Further preferably, the length holding mechanism is constituted by a lock device capable of fixing the flexible member to the first corner.

  According to the vehicle seat configured as described above, since the flexible member is fixed to the first corner portion, tension easily acts on the flexible member. Thereby, the function as a truss structure of a flexible member can be improved, and the intensity of frame of a sheet can be raised more effectively.

  Also preferably, the length adjusting mechanism is constituted by a winding device capable of winding and pulling out the flexible member.

  According to the vehicle seat configured in this way, the skeleton of the seat can be realized with a simpler configuration.

  Further preferably, the connecting member and the length adjusting mechanism are constituted by actuators capable of extending and contracting. The length holding mechanism unit is a self-locking mechanism which is incorporated in the actuator and restricts the transmission of power from the output side to the input side of the actuator.

  According to the vehicle seat configured in this manner, the degree of freedom in changing the shape of the frame of the seat can be further enhanced.

  Also preferably, the plurality of triangular members form a seat back, a seat cushion, an armrest or an ottoman frame.

  According to the vehicle seat configured in this manner, it is possible to change the seat back, the seat cushion, the armrest or the ottoman frame into various shapes with a simple configuration.

  As described above, according to the present disclosure, it is possible to provide a vehicle seat that achieves a high strength sheet skeleton with a high degree of freedom in shape change with a simple configuration.

1 is a perspective view showing a vehicle seat according to Embodiment 1. FIG. It is a perspective view which shows the back frame incorporated in the vehicle seat in FIG. It is a side view which briefly shows the side frame in FIG. It is sectional drawing which shows the wire in FIG. 3, a guide member, and a locking device (at the time of locking operation). It is sectional drawing which shows the wire in FIG. 3, a guide member, and a locking device (at the time of unlocking operation). It is a side view which shows one form after the deformation | transformation of the side frame in FIG. It is a side view which shows another form after the deformation | transformation of the side frame in FIG. It is a side view which shows another form after the deformation | transformation of the side frame in FIG. FIG. 10 is a side view showing a first modification of the back frame in the first embodiment. FIG. 21 is a side view showing a second modification of the back frame in the first embodiment. FIG. 21 is a side view showing a third modification of the back frame in the first embodiment.

  Embodiments of the present disclosure will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

Embodiment 1
FIG. 1 is a perspective view showing a vehicle seat according to the first embodiment. FIG. 2 is a perspective view showing a back frame built in the vehicle seat in FIG.

  Referring to FIGS. 1 and 2, the vehicle seat 10 in the present embodiment is a seat mounted on a car. First, the overall structure of the vehicle seat 10 will be described.

  The vehicle seat 10 has a seat back 11 and a seat cushion 16. The seat back 11 is a seat portion that supports the back of the occupant. The seat cushion 16 is a seat portion that supports the occupant from below. The seat back 11 is provided to stand up from the end of the seat cushion 16 on the seat rear side.

  The seat back 11 has a back frame 21, a back pad (not shown), and a back cover 12.

  The back frame 21 forms a frame of the seat in the seat back 11. The back frame 21 may be formed of resin or metal. The back pad is provided to cover the back frame 21. The back pad is made of an elastic material such as urethane foam, and elastically receives the load from the occupant. The back cover 12 is placed over the entire surface of the back pad. The back cover 12 is made of, for example, a fabric (cloth) or a leather (leather), and has an appearance of the seat back 11.

  The seat cushion 16 has a cushion frame (not shown), a cushion pad (not shown), and a cushion cover 17.

  The cushion frame forms a seat frame in the seat cushion 16. The cushion pad is provided on the cushion frame. The cushion pad is made of an elastic material such as urethane foam, and elastically receives the weight of the occupant seated on the vehicle seat 10. The cushion cover 17 is placed over the entire surface of the cushion pad. The cushion cover 17 is made of, for example, a fabric (cloth) or leather (leather), and has an appearance of the seat cushion 16.

  Subsequently, the structure of the back frame 21 will be described in detail. Referring to FIG. 2, the back frame 21 has a rectangular frame shape as a whole. The back frame 21 has a pair of left and right side frames 22 (22L, 22R), an upper frame 23, and a lower frame 24.

  The side frames 22L and the side frames 22R are arranged at intervals in the sheet width direction. The side frame 22L is provided on the left side when facing the front of the seat, and the side frame 22R is provided on the right side when facing the front of the seat. The side frames 22L and 22R have a symmetrical structure. The side frames 22 extend in the vertical direction.

  The upper frame 23 is provided on the upper end side of the side frame 22. The upper frame 23 extends in the sheet width direction, and connects the side frames 22L and 22R. The lower frame 24 is provided on the lower end side of the side frame 22. The lower frame 24 extends in the seat width direction, and connects the side frame 22L and the side frame 22R.

  In addition, although the rod-shaped upper frame 23 and the lower frame 24 are shown in FIG. 2, it is not restricted to this, for example, the side frame 22L and the side frame 22R are connected by panel-shaped frame material It is also good.

  FIG. 3 is a side view schematically showing the side frame in FIG. For convenience of illustration and description, a smaller number of triangular members 31 are shown in FIG. 3 than the plurality of triangular members 31 shown in FIG.

  Referring to FIGS. 2 and 3, side frame 22 has a plurality of triangular members 31, a plurality of pin members 51, a base plate 25, and a plurality of biasing members 52.

  The base plate 25 is provided on the lower end side of the side frame 22. The base plate 25 is provided as a support member for supporting the plurality of triangular members 31. The lower frame 24 connects the base plates 25 to each other between the side frames 22L and 22R. A cushion frame is connected to the base plate 25.

  The triangular member 31 is formed of a flat plate having a triangular shape. The triangular member 31 has a triangular shape when viewed from the side of the seat. The plurality of triangular members 31 are arranged in a line along the vertical direction.

  As shown in FIG. 3, the triangular member 31 has a first corner 36, a second corner 37, a third corner 38, a first side 41, a second side 42, and a third side. And a side portion 43.

  The first corners 36 are arranged diagonally of the first side 41. The second corners 37 are arranged diagonally of the second side 42. The third corner 38 is disposed diagonally of the third side 43. The second corner 37 and the third corner 38 are disposed at both ends of the first side 41. The third corner 38 and the first corner 36 are located at both ends of the second side 42. The first corner 36 and the second corner 37 are located at both ends of the third side 43.

  The side frame 22 includes, as the plurality of triangular members 31, a triangular member 31A, a triangular member 31B, a triangular member 31C, a triangular member 31D, and a triangular member 31E. The triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D, and the triangular member 31E are arranged from the bottom to the top in the order listed. The triangular member 31 </ b> A is located at the lowermost position among the plurality of triangular members 31, and the triangular member 31 </ b> E is located at the uppermost position among the plurality of triangular members 31.

  In the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E, the second corner 37 and the third corner 38 are rotatably connected to each other between the adjacent triangles 31. And, the first side portion 41 is combined so as to be continuous between the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E.

  The pin members 51 rotatably connect the triangular members 31 adjacent to each other. The pin member 51 has an axial shape extending in the sheet width direction.

  For example, focusing on the triangular member 31B, the triangular member 31C and the triangular member 31D, the second corner portion 37 of the triangular member 31B and the third corner portion 38 of the triangular member 31C are rotatably connected by the pin member 51. ing. The second corner portion 37 of the triangular member 31C and the third corner portion 38 of the triangular member 31D are rotatably connected by the pin member 51. The third corner 38 of the triangular member 31 </ b> A is rotatably connected to the base plate 25 by the pin member 51.

  The upper frame 23 connects the triangular members 31E to each other between the side frames 22L and 22R.

  The first corner 36 of the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E is disposed on the seat front side, and the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and The second corner 37 and the third corner 38 (first side 41) of the triangular member 31E are disposed on the seat rear side.

  The triangular members 31A, the triangular members 31B, the triangular members 31C, the triangular members 31D, and the first side portions 41 of the triangular members 31E are continuous in an arc shape as a whole. The first side 41 of the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E extends upward while inclining from the seat front side to the seat rear side in the seat longitudinal direction as a whole There is.

  The biasing member 52 biases the triangular member 31 in a direction to separate the first corner portions 36 of the triangular members 31 adjacent to each other.

  The biasing member 52 is constituted by a wound spring (coil spring) provided around the axis of the pin member 51. The biasing member 52 is provided on each of the plurality of pin members 51 connecting the base plate 25, the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D, and the triangular member 31E. For example, focusing on the biasing member 52 provided around the axis of the pin member 51 between the triangular member 31A and the triangular member 31B, in the biasing member 52, the triangular member 31B rotates clockwise with respect to the triangular member 31A. An elastic force is generated in the direction of rotation (in the direction indicated by the arrow 110 in FIG. 3).

  FIG. 4 is a cross-sectional view showing the wire, the guide member, and the locking device (during the locking operation) in FIG. FIG. 5 is a cross-sectional view showing the wire, the guide member and the locking device (during the unlocking operation) in FIG.

  With reference to FIGS. 2 to 5, the vehicle seat 10 further includes a wire 61, a plurality of guide members 63, a winding device 26, and a plurality of locking devices 66.

  The wire 61 is flexible. The wire 61 extends between the first corner portions 36 of the triangular members 31 adjacent to each other, and connects the triangular members 31 adjacent to each other. The wire 61 is routed across the first corner 36 of the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D, and the triangular member 31E.

  The triangular member 31E has a wire fixing portion 64. The wire fixing portion 64 is provided at the first corner portion 36 of the triangular member 31E. One end of the wire 61 is fixed to the wire fixing portion 64.

  The guide member 63 is provided at each of the triangular member 31A, the triangular member 31B, the triangular member 31C, and the first corner portion 36 of the triangular member 31D. The guide member 63 is configured to guide the wire 61 at the first corner portion 36 of each triangular member 31.

  The guide member 63 is provided with a through hole 65. The through hole 65 extends in the alignment direction of the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E, and penetrates the guide member 63. The wire 61 is inserted through the through hole 65.

  The winding device 26 is configured to be able to adjust the length of the wire 61 between the triangular members 31 adjacent to each other. The winding device 26 can adjust the length of the wire 61 routed between the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D, and the first corner portion 36 of the triangular member 31E. Is configured. The winding device 26 is a device for winding and drawing the wire 61. The winding device 26 is attached to the base plate 25.

  The winding device 26 has a reel 27 and a motor 28. The wire 61 is wound around the reel 27 from the other end side. The reel 27 is connected to the output shaft of the motor 28. By selectively transmitting the forward and reverse rotations from the motor 28 to the reel 27, winding and drawing of the wire 61 is enabled.

  Although motor 28 is provided in each of side frame 22L and side frame 22R in the present embodiment, the present invention is not limited thereto. Reel 27 in side frame 22L and reel 27 in side frame 22R are single units. It may be configured to be driven by one motor. Instead of the wire 61, a flexible rack may be used.

  The lock device 66 is configured to be capable of holding the length of the wire 61 between the triangular members 31 adjacent to each other.

  The lock device 66 is provided at each of the triangular member 31A, the triangular member 31B, the triangular member 31C, and the first corner portion 36 of the triangular member 31D. The lock device 66 is a device capable of fixing (locking operation) the wire 61 to each triangular member 31 and releasing (unlocking operation) fixing of the wire 61 to each triangular member 31.

  The lock device 66 has an electric cylinder 69 and a pressing member 68. The pressing member 68 is provided at the tip of the cylinder rod of the electric cylinder 69. The pressing member 68 is made of a friction material. The pressing member 68 moves the pressing member 68 at a position where the pressing member 68 presses the wire 61 (the position shown in FIG. 4) and a position where the pressing member 68 retracts from the wire 61 (FIG. 5). Move between) and When the pressing member 68 presses the wire 61, the wire 61 is fixed to the triangular member 31, and when the pressing member 68 retracts from the wire 61, the fixing of the wire 61 to the triangular member 31 is released.

  6 is a side view showing one form of the side frame in FIG. 3 after deformation. FIG. 7 is a side view showing another form of the side frame in FIG. 3 after deformation.

  With reference to FIGS. 2 to 7, the vehicle seat 10 further includes a control device (not shown). The control device controls driving of the winding device 26 (motor 28) and driving of the locking device 66 (electric cylinder 69) by receiving an instruction (input) from the occupant regarding the attitude of the seat.

  As an example, when changing from the side frame 22 shown in FIG. 3 to the side frame 22 shown in FIG. 6 (during normal reclining), the wire 61 from the winding device 26 is operated while unlocking all the locking devices 66. Pull out.

  The triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E receive an elastic force from the biasing member 52, and the first corner portion 36 of the triangular member 31A and the first member of the triangular member 31B. The length of the wire 61 between the corner portion 36 is increased (L1 → L1 '), and the length of the wire 61 between the first corner portion 36 of the triangular member 31B and the first corner portion 36 of the triangular member 31C. Increase (L2 → L2 ′), and the length of the wire 61 between the first corner 36 of the triangular member 31C and the first corner 36 of the triangular member 31D increases (L3 → L3 ′), The length of the wire 61 between the first corner portion 36 of the triangular member 31D and the first corner portion 36 of the triangular member 31E is mutually rotated so as to increase (L4 → L4 ').

  By locking all the locking devices 66, the lengths (L1 ', L2', L3 ', L4') of the wires 61 between the adjacent triangular members 31 are held. Thereby, it is possible to obtain the shape of the side frame 22 (back frame 21) which has fallen toward the seat rear side.

  As another example, when changing from the side frame 22 shown in FIG. 6 to the side frame 22 shown in FIG. 7, the locking device 66 in the triangular member 31C, triangular member 31D and triangular member 31E is locked to operate The wire 61 is wound around the winding device 26 while the locking device 66 in the member 31A and the triangular member 31B is unlocked.

  The triangular member 31A, the triangular member 31B and the triangular member 31C receive the winding of the wire 61, and the length of the wire 61 between the first corner 36 of the triangle 31A and the first corner 36 of the triangle 31B. And the length of the wire 61 between the first corner 36 of the triangular member 31B and the first corner 36 of the triangular member 31C decreases (L2 '→ L2). Rotate relative to each other. In the triangular member 31C, the triangular member 31D and the triangular member 31E, the length (L3 ') of the wire 61 between the first corner 36 of the triangular member 31C and the first corner 36 of the triangular member 31D is maintained. The length (L4 ') of the wire 61 between the first corner 36 of the triangular member 31D and the first corner 36 of the triangular member 31E is maintained.

  By locking all the locking devices 66, the lengths (L1, L2, L3 ', L4') of the wires 61 between the adjacent triangular members 31 are held. As a result, it is possible to obtain the shape of the side frame 22 (back frame 21) in which only the side frame 22 (back frame 21) between the triangular member 31C, the triangular member 31D and the triangular member 31E falls toward the seat rear side. .

  FIG. 8 is a side view showing still another form of the side frame in FIG. 3 after deformation. Referring to FIG. 8, wire 61 is wound until the length of wire 61 routed between triangular member 31A, triangular member 31B, triangular member 31C, triangular member 31D and triangular member 31E is minimized. As a result, the side frames 22 (the back frames 21) can be rounded to the front side of the seat for downsizing, and the seat back 11 can be stored.

  Note that, typically, the driving of the motor 28 in the side frame 22L and the driving of the motor 28 in the side frame 22R are controlled to be synchronized, but the invention is not limited thereto, and is controlled to be asynchronous. It is also good. In this case, the back frame 21 can be deformed into an asymmetrical shape.

  As described above, by adjusting the length of the wire 61 between the triangular members 31 adjacent to each other, the side frame 22 (back frame 21) can be changed from a simple reclining shape to a folded or curved shape, etc. It can be deformed into various shapes. At this time, it is possible to adjust the length of the wire 61 between the adjacent triangular members 31 by appropriately controlling the driving of the winding device 26 and the driving of the locking device 66, so that the simplification is simplified. With the above configuration, it is possible to realize the back frame 21 having a high degree of freedom in shape change.

  In addition, when the vehicle on which the vehicle seat 10 is mounted collides from the rear, a load is applied to the back frame 21 from the front of the seat. Even in such a case, the truss structure by the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E and the wire 61 wired across these triangular members 31 The load from the front of the seat can be effectively received by the back frame 21.

  In the present embodiment, in particular, the tension by the biasing member 52 acts on the wire 61 between the adjacent triangular members 31, and the length of the wire 61 is a locking device between the adjacent triangular members 31. Since it is hold | maintained by 66, the effect by said truss structure can be show | played more effectively.

  In the present embodiment, although the case where the winding and drawing of the wire 61 and the locking of the wire 61 are performed by electric driving has been described, the present invention is not limited thereto, and may be manually performed. In addition, the triangular member 31 may be formed of a triangular prism continuously extending between the side frame 22L and the side frame 22R.

  The structure of the vehicle seat 10 according to the first embodiment of the present disclosure described above will be described collectively. The vehicle seat 10 according to the present embodiment includes a plurality of triangular members forming the back frame 21 as a frame of the seat. 31 is provided. The triangular member 31 has a first side 41, a first corner 36 disposed diagonally to the first side 41, and a second corner 37 and a third arranged at both ends of the first side 41. And a corner 38. In the plurality of triangular members 31, the second corner portion 37 and the third corner portion 38 are rotatably connected to each other between adjacent triangular members 31, and the first side across the plurality of triangular members 31. The parts 41 are combined in series. The vehicle seat 10 extends between the first corners 36 of the triangular members 31 adjacent to each other, and between the wire 61 as a connecting member for connecting the triangular members 31 adjacent to each other and the triangular members 31 adjacent to each other Length holding device configured to be capable of holding the length of the wire 61 between the winding device 26 as a length adjusting mechanism configured to be able to adjust the length of the wire 61 in the case, and the triangular members 31 adjacent to each other And a lock device 66 as a mechanism unit.

  According to the vehicle seat 10 in the first embodiment configured as described above, the back frame 21 having a high degree of freedom in shape change and high strength can be realized by the simple configuration.

  The triangular member in the present disclosure may have a triangular shape that can be a component of the truss structure between the first corner, the second corner, and the third corner.

  The triangle formed by the triangular members in the present disclosure may be an equilateral triangle, an isosceles triangle, or an irregular triangle. The triangle formed by the triangular members in the present disclosure may be an acute triangle, a right triangle, or an obtuse triangle. One triangular member of the plurality of triangular members and another triangular member of the plurality of triangular members may have triangular shapes having different shapes, or may have triangular shapes having different sizes. You may have.

  The triangular member in the present disclosure includes a frame member extending between the first corner and the second corner, a frame member extending between the second corner and the third corner, a third corner and a first corner And frame members extending therebetween.

  The present disclosure is not limited to the above-described back frame, and may be applied to, for example, a seat cushion frame (cushion frame), an armrest frame, an ottoman frame, or the like.

Second Embodiment
In the present embodiment, various modified examples of the back frame 21 (side frame 22) in the first embodiment will be described.

  FIG. 9 is a side view showing a first modified example of the back frame in the first embodiment. 9 and FIG. 10 and FIG. 11 described later correspond to FIG. 3 in the first embodiment.

  Referring to FIG. 9, in the present variation, the vehicle seat 10 further includes a wire 76 and a winding device 78.

  The triangular member 31E further includes a wire fixing portion 77. The wire fixing portion 77 is provided at the second corner portion 37 of the triangular member 31E. One end of the wire 76 is fixed to the wire fixing portion 77.

  The pin member 51 is provided with a guide structure (see FIGS. 4 and 5) similar to the guide member 63 described in the first embodiment. The wire 76 is guided by a guide structure provided in the pin member 51, and the third and fourth corner portions 37 and 38 of the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D and the triangular member 31E. It is wired across the gap. The wire 76 is wired along the first side 41 of the triangular member 31A, the triangular member 31B, the triangular member 31C, the triangular member 31D, and the triangular member 31E.

  The winding device 78 has the same structure (see FIG. 2) as the winding device 26 described in the first embodiment. The winding device 78 is a device for winding and drawing the wire 76. The winding device 78 is attached to the base plate 25. The wire 76 is wound around the reel of the winding device 78 from the other end side.

  According to such a configuration, in addition to the winding and drawing of the wire 61 by the winding device 26, the winding and drawing of the wire 76 by the winding device 78 allows the side frame 22 (back frame 21) to be The degree of freedom of shape change can be further enhanced.

  FIG. 10 is a side view showing a second modification of the back frame in the first embodiment. Referring to FIG. 10, in the present modification, the guide device 63 is not provided with the lock device 66 described in the first embodiment. The vehicle seat has a locking device 81 in place of the locking device 66.

  The lock device 81 is configured to be capable of holding the length of the wire 61 between the triangular members 31 adjacent to each other.

  The lock device 81 is provided to each of the plurality of pin members 51. The lock device 81 fixes the triangle members 31 adjacent to each other (fixes between the base plate 25 and the triangle member 31A in the pin member 51 connecting the base plate 25 and the triangle member 31A) and releases these fixes (unlocking operation) And is configured to be possible.

  Also in such a configuration, the side frame 22 (back frame 21) can be deformed into various shapes by controlling the driving of the winding device 26 and the driving of the locking device 81.

  FIG. 11 is a side view showing a third modification of the back frame in the first embodiment. Referring to FIG. 11, in the present modification, the vehicle seat is replaced with the wire 61, the guide member 63, the winding device 26, and the lock device 66 in the first embodiment, and a plurality of actuators 91 (91A, 91B, 91C, 91D, 91E). The actuator 91 is an actuator that can be extended and contracted. The actuator 91 is composed of an electric cylinder.

  The actuator 91 extends between the first corner portions 36 of the triangular members 31 adjacent to each other, and connects the triangular members 31 adjacent to each other.

  The actuator 91A extends between the base plate 25 and the first corner 36 of the triangular member 31A. The cylinder side end of the actuator 91A is rotatably connected to the base plate 25, and the piston rod side end of the actuator 91A is rotatably connected to the triangular member 31A. The actuator 91B extends between the first corner 36 of the triangular member 31A and the first corner 36 of the triangular member 31B. The cylinder side end of the actuator 91B is rotatably connected to the triangular member 31A, and the piston rod side end of the actuator 91B is rotatably connected to the triangular member 31B.

  The actuator 91C extends between the first corner 36 of the triangular member 31B and the first corner 36 of the triangular member 31C. The cylinder side end of the actuator 91C is rotatably connected to the triangular member 31B, and the piston rod side end of the actuator 91C is rotatably connected to the triangular member 31C. The actuator 91D extends between the first corner 36 of the triangular member 31C and the first corner 36 of the triangular member 31D. The cylinder side end of the actuator 91D is rotatably connected to the triangular member 31C, and the piston rod side end of the actuator 91D is rotatably connected to the triangular member 31D.

  The actuator 91E extends between the first corner 36 of the triangular member 31D and the first corner 36 of the triangular member 31E. The cylinder side end of the actuator 91E is rotatably connected to the triangular member 31D, and the piston rod side end of the actuator 91E is rotatably connected to the triangular member 31E.

  The end (the end on the cylinder side and the end on the piston rod side) of the actuator 91 connected to each triangular member 31 may be the end opposite to the above.

  The actuator 91 incorporates a self-locking mechanism that restricts the transmission of power from the output side of the actuator 91 to the input side. The self-locking mechanism is constituted by, for example, a reduction gear (worm gear) of a motor incorporated in the actuator 91.

  According to such a configuration, by controlling the drive of the plurality of actuators 91 (91A, 91B, 91C, 91D, 91E), the lengths of the respective actuators 91 between the adjacent triangular members 31 are adjusted. Thereby, the side frame 22 (back frame 21) can be deformed into various shapes. At this time, the length of each actuator 91 between the adjacent triangular members 31 can be held by the self-locking mechanism incorporated in the actuator 91.

  According to the vehicle seat in the second embodiment configured as described above, the effects described in the first embodiment can be similarly exhibited.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the above description but by the claims, and is intended to include all the modifications within the meaning and scope equivalent to the claims.

  The present disclosure is applied to, for example, a vehicle seat for vehicles, planes, ships, trains, and the like.

  10 Vehicle Seat, 11 Seat Back, 12 Back Cover, 16 Seat Cushion, 17 Cushion Cover, 21 Back Frame, 22, 22L, 22R Side Frame, 23 Upper Frame, 24 Lower Frame, 25 Base Plate, 26, 78 Winding Device , 27 reel, 28 motor, 31, 31A, 31B, 31C, 31D, 31E triangular member, 36 first corner, 37 second corner, 38 third corner, 41 first side, 42 second side , 43 third side, 51 pin member, 52 biasing member, 61, 76 wire, 63 guide member, 64, 77 wire fixing portion, 65 through hole, 66, 81 locking device, 68 pressing member, 69 electric cylinder, 91, 91 A, 91 B, 91 C, 91 D, 91 E Actuators.

Claims (7)

It has a plurality of triangular members that form the framework of the seat,
The triangular member includes a first side, a first corner arranged diagonally to the first side, and a second corner and a third corner arranged at both ends of the first side. Have
The plurality of triangular members are connected between the adjacent triangular members such that the second corner and the third corner are rotatably connected to each other, and the first triangular member is interposed between the plurality of triangular members. The sides are combined to make a series, and
A connecting member which extends between the first corners of the adjacent triangular members and connects the adjacent triangular members to each other;
A length adjustment mechanism configured to adjust the length of the connecting member between the adjacent triangular members;
And a length holding mechanism configured to be capable of holding the length of the connecting member between the triangular members adjacent to each other.   The vehicle seat according to claim 1, wherein the connecting member is a flexible member that is flexible and is routed through the first corners of the plurality of triangular members.   The vehicle seat according to claim 2, further comprising a biasing member that biases the triangular member in a direction in which the first corners of the triangular members adjacent to each other are separated.   The vehicle seat according to claim 2 or 3, wherein the length holding mechanism portion is configured of a lock device capable of fixing the flexible member to the first corner.   The vehicle seat according to any one of claims 2 to 4, wherein the length adjustment mechanism portion is configured of a winding device capable of winding and pulling out the flexible member. The connecting member and the length adjusting mechanism are constituted by actuators capable of extending and contracting,
2. The vehicle seat according to claim 1, wherein the length holding mechanism unit is a self-locking mechanism that is incorporated in the actuator and that restricts the transmission of power from the output side to the input side of the actuator.   The vehicle seat according to any one of claims 1 to 6, wherein the plurality of triangular members form a seat back, a seat cushion, an armrest or an ottoman frame.