Seat arrangement

Abstract

The present application provides a kind of seat device (10), can only be in the specific state when the reclining operation of seat (1) becomes problem, reliably and easily limit reclining operation by simple and compact structure.The seat device (10) has: reclining operation part (100), it is carried out by the operation of the backrest (3) of seat (1) by reclining mechanism (50) to lean; Locking mechanism (120), it is when seat (1) is longitudinal state, the reclining operation part (100) is constrained to be unable to operate;Cable (124), it is pulled along with the conversion of seat (1) to longitudinal state.Locking mechanism (120) has by linearly moving relative to the stopper (121) of operating lever (110) of reclining operation part (100) and is engaged, stopper (121) is directly pulled by cable (124), linearly moves to the constraint position of being engaged with operating lever (110) and being unable to operate.

Description

Technical Field

[0001] This invention relates to a seating device capable of changing the state of a seat. Background Technology

[0002] Traditionally, seats in vehicles, for example, have a bench-like design that is long in both directions and can accommodate multiple passengers, and are typically installed along the walls inside the passenger compartment. Among the bench-like types, there are known rotating seats that can change direction by rotating around a central axis of rotation in a configuration where the seat back is parallel to the longitudinal length of the wall and in a configuration where the seat back is perpendicular to the wall.

[0003] In this type of rotating seat, in order to prevent the seat's trajectory (rotation radius) from interfering with the wall when the seat is rotated from a longitudinal state along the wall to an intersecting state, a seat device is proposed that has a sliding mechanism and a transmission mechanism that links the various mechanisms, in addition to the seat's rotation mechanism (see, for example, Patent Document 1).

[0004] In the aforementioned seating arrangement, in order to maximize the aisle width between the seats on both sides of the passenger compartment and obtain comfortable space, the seat's rotation axis is located at the wall in the longitudinal position. On the other hand, in the cross position, the seat's rotation axis slides along the aisle side in a manner that prevents interference with the wall. Therefore, in the aforementioned seating arrangement, in the longitudinal position, to prevent interference with the wall, the backrest cannot be tilted, and a reclining mechanism that provides good seating comfort is not available.

[0005] Therefore, the inventors of this application have proposed a seat device that restricts reclining operation when the seat is in a longitudinal position, through Japanese Patent Application No. 2020-34280. This seat device prevents reclining operation when the seat is in a longitudinal position via a locking mechanism located on the armrests. The locking mechanism uses an L-shaped linkage and a locking pin that are linked to the change in seat position to restrain the reclining operation lever. The L-shaped linkage is a vertically elongated component, and the locking pin is a structure that moves vertically along the L-shaped linkage.

[0006] In addition, another type of rotating seat has been proposed, which includes a stop mechanism that prevents the reclining mechanism from operating when the seat is facing the window (see, for example, Patent Document 2). The stop mechanism is constructed by providing long connecting rods on both sides on the bottom side (movable base) of the seat. One end of the connecting rod is connected to the reclining operation line, and the other end is connected to the line of the reclining operation lever in addition to the tension spring. When the seat is facing the window, the tension spring is stretched, preventing the operation lever line from being pulled.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent No. 3431772

[0010] Patent Document 2: Japanese Published Patent No. 63-13947 Summary of the Invention

[0011] However, in the prior art shown in Japanese Patent Application No. 2020-34280, the locking mechanism provided with the armrest along with the tilting lever uses an L-shaped linkage and a locking pin to restrain the lever. This results in a large number of parts and a complex structure, leading to high costs. Furthermore, the L-shaped linkage is significantly longer in the vertical direction, thus increasing the actual space required for its movable area. This encroaches on the limited space of the armrest, creating design problems such as restricting the operation of adding a cushioned elbow pad.

[0012] Furthermore, in the prior art described in Patent Document 2, the stop mechanism uses a connecting rod and a tension spring to constrain the operating rod, resulting in a large number of parts and a complex structure, which leads to high costs. Moreover, since the connecting rod is longer on both sides, it requires more space to accommodate its movable area, making it particularly difficult to install on the bottom side of the seat (movable base) where space is limited.

[0013] Furthermore, in the aforementioned stopping mechanism, the movement of the operating lever is not directly constrained, but rather indirectly constrained via lines, connecting rods, and tension springs. Therefore, the following problems exist: for example, if the tension spring deteriorates, the constraint on the operating lever becomes insufficient, and the reliability of the locking mechanism is lacking.

[0014] This invention addresses the problems of the existing technology and aims to provide a seating device that reduces costs through a simple structure that reduces the number of parts, is compact, meets space-saving requirements, and reliably and easily restricts reclining operation only when reclining operation becomes a problem.

[0015] To achieve the above objectives, one aspect of the present invention provides a seating device capable of changing the state of a seat, characterized in that it comprises:

[0016] The reclining mechanism allows the seat back to tilt backwards;

[0017] The operating unit performs the operation of tilting the backrest via the reclining mechanism;

[0018] A locking mechanism that, when the seat is in a specific position, restricts the operation of the operating part from being operated; and

[0019] The cable is pulled as the seat transitions to the specified state.

[0020] The operating unit can be displaced from its normal initial position to its operating position during operation.

[0021] The locking mechanism has a limiter that engages with the operating part located in the initial position by linear movement.

[0022] The limiter is pulled directly by the cable, moving linearly from its usual unconstrained position, which is detached from the operating part, to a constrained position, where it engages with the operating part and cannot be operated.

[0023] The seating device according to the invention reduces costs through a simple structure that reduces the number of parts, can be compactly constructed, can meet space-saving requirements, and can reliably and easily limit reclining operation only when reclining operation becomes a problem in a specific situation. Attached Figure Description

[0024] Figure 1 This is a perspective view showing the reclining operation section of a seat device according to an embodiment of the present invention.

[0025] Figure 2 This is a side view showing the reclining operation section of a seat device according to an embodiment of the present invention.

[0026] Figure 3 This is a perspective view showing a portion of the cutout in the reclining operation section of the seat device according to an embodiment of the present invention.

[0027] Figure 4 These are perspective and side views showing the reclining operation section of a seat device according to an embodiment of the present invention.

[0028] Figure 5 This is a perspective view showing the cross-state of the seating device according to an embodiment of the present invention.

[0029] Figure 6 This is a perspective view showing the longitudinal state of the seat device according to an embodiment of the present invention.

[0030] Figure 7 This is a perspective view showing the internal structure of the seat device according to an embodiment of the present invention.

[0031] Figure 8 This is a front view showing the cross-state of the seating device according to an embodiment of the present invention.

[0032] Figure 9 This is a side view showing the longitudinal state of the seating device according to an embodiment of the present invention.

[0033] Figure 10 This is a perspective view showing the base, movable platform, and base frame of the seat device according to an embodiment of the present invention.

[0034] Figure 11 This is a side view showing the rotation operation section of the seat device according to an embodiment of the present invention.

[0035] Figure 12 This is a side view showing the rotation operation section of the seat device according to an embodiment of the present invention.

[0036] Figure 13 This is a perspective view showing the rotation locking mechanism of a seat device according to an embodiment of the present invention.

[0037] Figure 14 This is a perspective view showing the rotation locking mechanism of a seat device according to an embodiment of the present invention.

[0038] Figure 15 This is an explanatory diagram illustrating the process by which the seating device according to an embodiment of the present invention changes the state of the seat. Detailed Implementation

[0039] Hereinafter, embodiments representing the present invention will be described based on the accompanying drawings.

[0040] Figures 1 to 15 An embodiment of the present invention is shown.

[0041] The seating device 10 of this embodiment can change the state of the seat 1. Here, the state of the seat 1 includes not only the direction of rotation of the seat 1, but also changes in the fore-and-aft position of the seat 1. Furthermore, the type of seat 1 is not particularly limited, but the following description will use a two-seater bench installed in the passenger compartment of a rail vehicle as an example. In addition, the relative dimensional relationships and shapes of the constituent elements in the various figures may be appropriately modified in the design, and may sometimes differ from the actual situation.

[0042] <Overview of Seating Assembly 10>

[0043] Figure 10 This is a perspective view showing the base 11, the movable platform 20, and the base frame 30 of the seat assembly 10. Figure 7 This is a perspective view showing the internal structure of the seat assembly 10. Figure 5 This is a perspective view showing the crossed state of the seat assembly 10. Figure 8 This is a front view showing the same cross-shaped configuration of the seating assembly 10. Figure 6 This is a perspective view showing the longitudinal position of the seat assembly 10. Figure 9 This is a side view showing the same longitudinal configuration of the seating assembly 10. Furthermore, slight differences in shape for the same portion in the various figures are merely design variations (e.g., Figure 5 and Figure 10 (Differences in the shape of the base 11, etc.).

[0044] like Figure 10 As shown, the seat assembly 10 includes a base 11 fixed to the floor, a movable platform 20 supported on the base 11 that can move back and forth in the front-to-back direction, and a base frame 30 for the seat 1 that can rotate in both directions and is supported on the movable platform 20. Here, the base 11 is an example of the "fixed side of the seat" of the present invention, and the movable platform 20 and base frame 30 are examples of the "movable side of the seat" of the present invention. Furthermore, the seat assembly 10 is disposed on the floor next to the wall (window) in the passenger compartment of a rail vehicle. Figure 10 The "A" in the text refers to a portion of the wall that is parallel to the direction of travel of the rail vehicle.

[0045] In the seat assembly 10, the base frame 30 of the seat 1 is supported on the movable platform 20 via the rotating mechanism 40 and is rotatable about a rotation axis. Furthermore, the movable platform 20 is supported on the base 11 via the sliding mechanism 14, moving forward and backward together with the rotating mechanism 40. Moreover, the seat assembly 10 includes a linkage mechanism (not shown) to link the forward and backward movement of the sliding mechanism 14 with the rotation of the rotating mechanism 40 on the seat 1.

[0046] <About Seating 1>

[0047] like Figure 5 As shown, the seat 1 is a bench for example, with a pair of seats 2 and backrests 3 arranged side by side on both sides. A pair of side vents 4 are provided on both sides of the seat 1, covering the seats 2 from the sides. Each side vent 4 has an armrest 5 extending horizontally forward and backward at its upper end. Here, the armrest 5 is constructed by fitting a cushioned elbow pad onto the upper surface of the frame member forming the side vent 4. Furthermore, the lower end of the backrest 3 is connected by a reclining mechanism 50 (see reference...). Figure 7 It can be tilted and supported on the rear end side of the seat 2.

[0048] <Leanback Mechanism 50>

[0049] like Figure 7 As shown, the reclining mechanism 50 supports the backrest 3 so that it can tilt relative to the seat 2 within a predetermined angle range. The reclining mechanism 50 includes a damper 51, such as a gas spring. The damper 51 is configured to allow the piston rod 53 to be inserted into the cylinder body 52 and is arranged parallel to the front-rear direction on the base frame 30. The damper 51 applies force in the direction that causes the piston rod 53 to be housed in the cylinder body 52, but can fix the piston rod 53 in a state where it protrudes by an arbitrary amount.

[0050] The rear end of the cylinder body 52 is slidably connected to the lower end of the frame 3a inside the backrest 3. On the other hand, the front end of the piston rod 53, which extends from the front end of the cylinder body 52, is connected to a suitable part on the front end side of the base frame 30. With this damper 51, the backrest 3 can be held at any reclining angle. That is, when the damper 51 is in the locked state, the piston rod 53 is fixed in a state of protrusion by a predetermined amount by the cylinder body 52, and the backrest 3 can be held at any reclining angle.

[0051] When the damper 51 is released from its locked state, the backrest 3 returns to its most upright initial position due to the force exerted by the piston rod 53 on the cylinder body 52. ​​In this unlocked state, the backrest 3 can be adjusted to any reclining angle by the person sitting down pushing it backward against the restoring force of the damper 51.

[0052] The locking mechanism of damper 51 is a standard mechanism, so detailed description is omitted, but a release button 54 for unlocking the device is provided next to piston rod 53. Figure 7 As shown, a reclining operation section 100 for pressing the release button 54 to unlock the armrest 5 is provided at the front end of the armrest 5. Furthermore, the reclining operation section 100 is an example of the "operation section" of the present invention.

[0053] <Folding Operation Unit 100>

[0054] Figure 1 This is a perspective view of the tilting operation unit 100. Figure (a) shows the operation lever 110 in an unconstrained state (hereinafter "unconstrained state"), and Figure (b) shows the operation lever 110 in a constrained state (hereinafter "constrained state"). Figure 2 This is a side view of the tilting operation unit 100. Figure (a) shows the unconstrained state of the operating lever 110, and Figure (b) shows the constrained state of the operating lever 110.

[0055] Figure 3 This is a perspective view of a portion (flange 105) of the tilting operation unit 100 after cutting out. Figure (a) shows the unconstrained state of the operating lever 110, and Figure (b) shows the constrained state of the operating lever 110. Figure 4 Figure (a) shows the operating position where the operating lever 110 of the tilting operation unit 100 is raised, and Figure (b) is a side view. Furthermore, as... Figures 1-4 As shown, a tilting operation locking mechanism 120 is provided on the tilting operation unit 100.

[0056] like Figures 1-4 As shown, the tilting operation unit 100 modularizes each component by housing it in a single housing 101, as follows: Figure 5As shown, it is installed inside the front end of the armrest 5 (specifically, the upper end of the side arrangement 4). The reclining operation unit 100 performs the operation of tilting the backrest 3 (reclining operation) via the aforementioned reclining mechanism 50. As shown, the outer shell 101 is a metal component with a shape that is longer in the front-rear direction, and the bottom wall 103 is bent at a right angle along the lower edge of the side wall 102.

[0057] The tilting operation unit 100 includes an operating lever 110 that is pivotally supported on the housing 101. A support wall 104 parallel to the side wall 102 of the housing 101 is provided. The operating lever 110 is pivotally supported at approximately the center of the housing 101, which forms the rear end of the support wall 104, via a pivot 111 extending in the left-right direction on the horizontal plane.

[0058] The operating lever 110 is roughly L-shaped, with a pivot 111 supporting its approximate center as its swing center. One end serves as an operating part 112 for the user to operate with their fingers. The operating part 112 is positioned facing forward of the seat 1 and swings primarily in the vertical direction. At the other end, which is positioned relative to the operating part 112 and clamps the swing center, is an abutment part 113 that engages with the limiter 121 described later. The abutment part 113 is positioned downward and swings primarily in the forward and backward direction. Below the abutment part 113 is a groove 114 through which one end of the reclining locking cable 124 described later is inserted.

[0059] The control lever 110 is set to, during the backward tilting operation, move from... Figure 2 (a) The operating part 112, as shown, faces downward and the contact part 113 is in its usual initial position, as if... Figure 4 (b) As shown, the operating part 112 is pulled upward and the operating position of the contact part 113 is swung (displaced) forward. In addition, a locking groove 115 is provided between the swing center (pivot 111) of the operating lever 110 and the other end (contact part 113) for connecting one end of the backward tilting operating cable 116.

[0060] The other end of the tilt-back operation cable 116 extends to the release button 54 of the tilt-back mechanism 50 (not shown in the figure) (see reference). Figure 7 Here, the configuration is such that by pulling the operating lever 110 upward to the operating position, the linkage (not shown) on the release button 54 side is pulled via the tilting operating cable 116, thus pressing the release button 54 and releasing the locked state of the damper 51. Furthermore, the operating lever 110 is normally held in the initial position by being pulled by the tilting operating cable 116.

[0061] <Tilting-back operation locking mechanism 120>

[0062] The reclining operation unit 100 is provided with a reclining operation locking mechanism 120 that can restrict the reclining operation unit 100 to be inoperable. The reclining operation locking mechanism 120 restricts the reclining operation unit 100 to be inoperable when the seat 1 is in the longitudinal state (a specific state) described later. Furthermore, the reclining operation locking mechanism 120 is an example of the "locking mechanism" of the present invention.

[0063] like Figures 1-4 As shown, the reclining operation locking mechanism 120 has a limiter 121 that engages with the abutment portion 113 of the operating lever 110 when the operating lever 110 of the reclining operation unit 100 is in the initial position. The limiter 121 is supported at a forward position on the bottom wall 103 of the housing 101 so that it can move linearly in the fore-and-aft direction of the seat 1.

[0064] The limiter 121 is constructed of a block-shaped component, for example, made of metal, and is supported at a position near the front of the bottom wall 103 along a flange 105 that stands parallel to the side wall 102, allowing it to move linearly in the front-rear direction on the approximately horizontal bottom wall 103. Here, a guide groove 106 is provided on the flange 105 to movably engage and guide a shaft 122 protruding from the side of the limiter 121. Furthermore, the limiter 121, viewed from above, is located between the operating portion 112 and the abutment portion 113 of the operating lever 110.

[0065] When the seat 1 is switched to its longitudinal position (specific position) described above, one end of the reclining locking cable 124, which is pulled, is connected from the rear to the limiter 121. One end of the reclining locking cable 124 is configured to extend in a straight line in the same direction as the linear movement of the limiter 121. Here, with one end of the reclining locking cable 124 inserted through the groove 114 located in the abutment portion 113 of the operating lever 110, it extends forward and is directly connected to the rear side of the limiter 121 located in front of the abutment portion 113.

[0066] On the other hand, the other end of the reclining locking cable 124 extends to the rotation operation unit 200 side, described later. The reclining locking cable 124 is configured to be pulled from the rotation operation unit 200 side when the seat 1 is in a specific state (the longitudinal state described later). The limiter 121 is pulled directly by the reclining locking cable 124 from its normal unrestrained position (see reference) where it disengages from the contact portion 113 with the operating lever 110. Figure 1 (a) Move in a straight line to the constraint position where it engages with the aforementioned contact part 113 (refer to...). Figure 1 (b) Furthermore, the tilt-back locking cable 124 is an example of the “cable” of the present invention.

[0067] A spring member 123 is mounted between the front side of the limiter 121 and the front end piece 107 of the housing 101 located in front of it. The spring member 123 applies force to the limiter 121 towards its normally unrestrained position. Figure 1 As shown in (a), when the limiter 121 is in the unconstrained position, that is, at the very front of the linear movement range, the swing of the operating lever 110 is not constrained, as... Figure 4 As shown, a backward tilting operation is possible, which swings the operating part 112 of the operating lever 110 to an upward operating position. Furthermore, the spring component 123 is an example of the "force application unit" of the present invention.

[0068] When the tilt-back locking cable 124 is pulled, the limiter 121 overcomes the force of the spring component 123, such as Figure 1 As shown in (b), the lever moves backward in a straight line to the constrained position, that is, the rearmost end of the range of movement in the straight line. Here, the rear end face of the limiter 121 engages with the abutment portion 113 of the operating lever 110, thus the operating lever 110 remains in its normal initial position, preventing the operating portion 112 from swinging upward and thus constraining its operation. Furthermore, the support wall 104 of the housing 101 positions the operating lever 110 at its initial position.

[0069] Furthermore, regarding the tilt-lock cable 124, the inner cable is slidably inserted into the outer cable, and the end of the outer cable is fixed to a bracket 108 provided on the rear end side of the side wall 102 of the housing 101, so that the inner cable at one end of the tilt-lock cable 124 extends to the limiter 121 which is forward of the bracket 108. Similarly, the tilt-operation cable 116 also has an inner cable slidably inserted into the outer cable, and the end of the outer cable is fixed to the bracket 108, so that the inner cable at one end of the tilt-operation cable 116 extends to the locking groove 115 of the operating lever 110.

[0070] <Regarding the status of seat 1>

[0071] Figure 15 This is an explanatory diagram showing the process of converting seat 1 into a longitudinal state, a cross-shaped state, and a reverse cross-shaped state. Seat assembly 10 can convert the state of seat 1 into a longitudinal state where the seat back is approximately parallel to wall A (see reference). Figure 9 , Figure 6 The seat back and the wall A are roughly perpendicular to each other (refer to the intersection). Figure 5 Here, the crossover state has a crossover state (refer to...). Figure 5 () and a reverse cross state that is 180 degrees opposite to a cross state.

[0072] like Figure 15As shown, when the longitudinal direction of seat 1 is taken as the original position and the rotation angle is set to 0°, the rotation angle of the first crossover state is 90°, and the rotation angle of the reverse crossover state is -90°. Furthermore, the back of the seat and the back of the backrest 3 are synonymous. Hereinafter, when referring to the first crossover state and the reverse crossover state collectively, they will be abbreviated as crossover state.

[0073] <Base 11>

[0074] like Figure 10 As shown, the base 11 is fixed to the floor next to wall A inside the passenger compartment. The base 11 is constructed by assembling frame members into a long platform shape in a direction generally orthogonal to wall A (front-back direction). The upper surface of the base 11 is generally horizontal and is surrounded by the two end portions 12, 12 forming the long side and the rear end portion forming the short side (wall A side), but the front side (passage side) is open.

[0075] The base 11 is configured such that its rear end is approximately parallel to the wall A, and its two side ends 12 are approximately orthogonal to the wall A and face the passageway side. In addition, on the upper surface of the base 11, in addition to the sliding mechanism 14 described below, there are also related components such as limiters that limit the range of movement and rotation direction of the base frame 30.

[0076] <Sliding Mechanism 14>

[0077] like Figure 10 As shown, a movable stage 20 is mounted on the upper surface of the base 11 via a sliding mechanism 14, which allows it to move back and forth in a direction approximately orthogonal to the wall A. The sliding mechanism 14 includes a pair of guide rails 14a, 14a disposed on the inner sides of the two end portions 12, 12 of the base 11. The pair of guide rails 14a, 14a are parallel to each other along the inner sides of the two end portions 12, 12 of the base 11, and the two side portions 21, 21 of the movable stage 20 are slidably fitted into the inner sides of each guide rail 14a while maintaining their original shape.

[0078] <Mobile Station 20>

[0079] like Figure 10 As shown, the movable platform 20 is arranged substantially horizontally on the upper surface of the base 11 and is constructed by assembling frame members into a rectangular frame shape. The two ends 21, 21 of the long side forming the movable platform 20 are slidably fitted into the inner sides of the aforementioned pair of guide rails 14a, 14a. Thus, the movable platform 20 can slide forward or backward in a direction substantially orthogonal to the wall A. A rotation mechanism 40 for rotating the seat 1 about a rotation axis is provided approximately at the center of the movable platform 20.

[0080] <Rotating Mechanism 40>

[0081] The rotating mechanism 40 supports the base frame 30 of the seat 1 on the moving platform 20 so that it can rotate in both directions on a generally horizontal plane. The rotating mechanism 40 is configured as a unit in which a pair of inner and outer annular rotating disks are combined and rotated between each other, for example, with a bearing or the like sandwiched between them. In this rotating mechanism 40, the outer rotating disk is fixed to the moving platform 20, and the inner rotating disk is fixed to the base frame 30.

[0082] The rotation axis that serves as the center of rotation for seat 1 is the center line of the rotation mechanism 40, which, in this embodiment, is not a component physically present. For example... Figure 8 As shown, the rotating mechanism 40 includes a motor 41 as a power source. A reducer is attached to the motor 41, and a drive gear located on its output shaft rotatably meshes with a sprocket 42 located on the side of the base frame 30 and centered on the rotation axis. Furthermore, the rotating mechanism 40 can also rotate the seat manually.

[0083] <Base 30>

[0084] like Figure 10 As shown, the base frame 30 mounts the seat 1 and supports the rotating mechanism 40 on the moving platform 20. The base frame 30 is, for example, made of a metal plate that is flush with the bottom surface of the seat 2. A sprocket 42, which is rotatably engaged with the drive gear of the motor 41, is integrally provided on the lower surface of the base frame 30.

[0085] <Interlocking Mechanism>

[0086] In addition, the seat assembly 10 includes a linkage device (not shown) that links the rotation and forward / backward movement of the seat 1 so that the seat 1 does not interfere with the wall A when switching the seat 1 to a longitudinal state, a cross state, or a reverse cross state. Furthermore, the longitudinal state corresponds to the "specific state of the seat 1" of the present invention.

[0087] When the linkage mechanism causes the seat 1 to rotate together with the base frame 30, it converts the rotation of the base frame 30 into linear motion and transmits it to the moving platform 20, causing the moving platform 20 and the base frame 30 to move forward and backward in a straight line relative to the wall A, either approaching or separating. There is no particular limitation on the type of such linkage mechanism, but specifically, for example, it may utilize the invention described in Japanese Patent Application Publication No. 2018-187971, or the invention disclosed in Japanese Patent Application No. 2019-239066, which, although not disclosed, may be used.

[0088] <Rotary locking mechanism 60>

[0089] Figure 13 This is a perspective view of the rotary locking mechanism 60. Figure 14 This is a perspective view showing the state of the rotary locking mechanism 60 as viewed from below.

[0090] like Figure 10As shown, the seat assembly 10 includes a rotation locking mechanism 60 that restricts the base frame 30 (seat) to be unable to rotate in its respective rotational positions in a longitudinal, intersecting, and anti-intersecting state. The rotation locking mechanism 60 locks the base frame 30 so that it cannot rotate relative to the base 11; therefore, the moving platform 20 is also necessarily restricted to be unable to move forward or backward relative to the base 11.

[0091] The rotary locking mechanism 60 includes a locking pin 61 that can move up and down from the base 11 to the base frame 30, and locking holes 62a, 62b, and 62c provided on the base frame 30 for engaging the locking pin 61. Each locking hole 62a, 62b, and 62c is provided along one long side of the back of the seat and along two short sides of both sides of the seat in the generally rectangular base frame 30, for a total of three.

[0092] Locking pin 61 is assembled to unit 60a, which is fixed to the rear end of the upper surface side of base 11. Locking pin 61 can move upward from the upper surface side of base 11 to a locking position where it protrudes upward and is inserted into locking holes 62a, 62b, 62c, and a locking release position where it sinks downward and disengages from locking holes 62a, 62b, 62c.

[0093] When the seat 1 is switched to the longitudinal, intersecting, and anti-intersecting states, the locking pin 61 engages with the locking holes 62a, 62b, and 62c on the vertically aligned side of the base frame 30 at its respective positions, thereby constraining the seat 1 to prevent rotation. Specifically, in the longitudinal state, the locking pin 61 engages with the locking hole 62a located on one long side of the base frame 30. Furthermore, in the intersecting state, the locking pin 61 inserts into and engages with the locking hole 62b located on one short side of the base frame 30. Further, in the anti-intersecting state, the locking pin 61 engages with the locking hole 62c located on the other short side of the base frame 30.

[0094] like Figure 13 , Figure 14 As shown, in unit 60a, where locking pin 61 is installed, there are spring components (not shown) that cause locking pin 61 to protrude upwards and always exert force on the locked position, and connecting rods 60b that cause locking pin 61 to be inserted downwards in the unlocked position against the force of the spring components. Here, a rotary operating cable 206 for foot pedal operation is connected to connecting rod 60b (see reference). Figure 11 One end of the side.

[0095] The locking pin 61 is configured such that it is normally maintained in the locked position by the force of the spring component, but when the connecting rod 60b is pulled by the rotating operating cable 206, it overcomes the force of the spring component and enters the unlocked position. Figure 11As shown, the other end of the rotary operation cable 206 extends to the rotary operation unit 200, which will be described later, located on the side of the base 11. Here, by operating the rotary operation unit 200, the rotary operation cable 206 is stretched, and the constraint of the rotary locking mechanism 60 is released.

[0096] Additionally, although the illustration is omitted, one end of the electrically operated rotary operating cable is also connected to the linkage 60b of the rotary locking mechanism 60. The power source for extending the electrically operated rotary operating cable is, for example, the motor 41 that also serves the rotary mechanism 40. That is, the motor 41 has a clutch and is configured such that, by switching the clutch, it can switch between the action of rotating the seat via the rotary mechanism 40 and the action of disengaging the locking pin 61. Furthermore, the structure of the clutch of the motor 41 is a standard structure, therefore a detailed description is omitted.

[0097] In the rotary locking mechanism 60 of this embodiment, when the seat 1 is in its longitudinal position, the constraint of the rotary locking mechanism 60 cannot be released by the foot pedal operation at the rotary operation unit 200, but can only be released by the electric operation of the motor 41. Here, the electric operation is performed by the vehicle's attendants or station staff, while the foot pedal operation is mainly performed by the passengers.

[0098] <Rotary Operating Unit 200>

[0099] Figure 11 This is a side view showing that the rotary operation unit 200 is not constrained into an inoperable state by the rotary operation blocking mechanism 210. Figure 12 This is a side view showing the rotation operation unit 200 constrained into an inoperable state by the rotation operation blocking mechanism 210.

[0100] like Figure 5 As shown, the rotary operating unit 200 assembles each part into a single housing 201 and fixes it in a state where it hangs down from the front end of the moving stage 20.

[0101] like Figure 11 As shown, the rotary operating unit 200 has a foot pedal 204 at the lower end of a support bracket 202 fixed to the inner side of the housing 201, which is pivotally supported via a pivot 203. The foot pedal 204 has a pivot 203 supporting its base side as a rotation center, and its front end side can swing in the forward and backward direction.

[0102] The foot pedal 204 swings to a position protruding forward from the front of the outer casing 201 (see reference). Figure 11 ) and the storage location for the front side upwards (refer to) Figure 12The foot pedal 204 is subjected to force in its normally forward-protruding use position via the spring member 205. Here, when the foot pedal 204 is in the use position, it is possible to depress the foot pedal to release the constraint of the rotation locking mechanism 60, but when the foot pedal 204 is in the retracted position, it is not possible to release the constraint of the rotation locking mechanism 60.

[0103] The other end of the rotary operation cable 206 for foot pedal operation, which extends to the rotary locking mechanism 60, is connected to the base end of the foot pedal 204 via a connector. Here, the configuration is such that when the foot pedal 204 in the operating position is pressed down, the rotary operation cable 206 is pulled, and the locking pin 61 (see reference)... Figure 13 As it plunges downwards, the locking state of the rotating locking mechanism 60 is released.

[0104] Additionally, on the base end side of the foot pedal 204, a pin-shaped engaging portion 207 protruding laterally is fixed at an off-center position from the pivot 203. The other end of the tilt-locking cable 124, extending from the tilt-operation locking mechanism 120, is connected to the engaging portion 207 via a connector. Here, the configuration is such that when the engaging portion 207 engages with the engaging portion 211 described below, the tilt-locking cable 124 is pulled, the limiter 121 of the tilt-operation locking mechanism 120 moves rearward, and the tilt-operation unit 100 is restrained from operation.

[0105] <Rotation operation prevention mechanism 210>

[0106] Furthermore, a rotation operation preventing mechanism 210 is provided on the rotation operation unit 200 to prevent the release operation of the constraint of the rotation operation unit 200 from being performed. The rotation operation preventing mechanism 210 prevents the operation of the foot pedal 204 from being performed when the seat 1 is in the longitudinal state. Here, the longitudinal state corresponds to the "specific state of the seat 1" in this invention.

[0107] like Figure 11 , Figure 12 As shown, the rotation operation blocking mechanism 210 includes an engaging portion 211 provided on the base 11, which serves as the fixed side of the seat 1, and a engaged portion 207 provided on the aforementioned rotation operation portion 200, which is located on the movable side of the seat 1. The engaging portion 211 is disposed at the front end of the lower surface side of the base 11 and is formed as, for example, a metal bracket that protrudes obliquely upward in the forward direction.

[0108] As described above, the engaging part 207 is provided as a metal pin on the base end side of the foot pedal 204 at an off-center position from the pivot 203. The engaging part 207 is configured to engage with the engaging part 211 precisely when the seat 1 is in its longitudinal position (a specific position). When the engaging part 207 engages with the engaging part 211, the foot pedal 204 swings towards the retracted position against the force of the spring member 205, thus preventing the release operation of the rotation operation part 200. At the same time, the reclining operation part 100 is also restricted from operation.

[0109] <Function of Seat Device 10>

[0110] The function of the seat device 10 in this embodiment will be explained below.

[0111] based on Figure 15 First, the action of changing the state of seat 1 will be explained. For example... Figure 15 As shown in (a), when the base frame 30 (seat 1) is in its longitudinal position, the rotation axis (rotation mechanism 40) of the base frame 30 is moved back (approaches) to the maximum extent towards wall A. The long side of the base frame 30 (seat back) is approximately parallel to wall A, with a rotation angle of 0°. At this time, as... Figure 10 As shown, the locking pin 61 of the rotation locking mechanism 60 is embedded in the locking hole 62a located on one long side of the base frame 30, and the base frame 30 (seat 1) is constrained to be unable to rotate in the longitudinal state.

[0112] <<Transition from a longitudinal state to a cross state>>

[0113] like Figure 15 (a)~ Figure 15 As shown in (c), in order to change the base frame 30 (seat 1) from a longitudinal state to a cross state (rotation angle 90°), it is necessary to release the rotation constraint based on the rotation locking mechanism 60. The action of disengaging the locking pin 61 from the locking hole 62a cannot be performed by operating the foot pedal 204, but is performed by electric operation using the power of the motor 41.

[0114] exist Figure 15 In the longitudinal state shown in (a), after the constraint of the rotation locking mechanism 60 is released, when as... Figure 15 (b) shows the base frame 30 being moved in the positive direction by the motor 41. Figure 15 When the base frame 30 rotates counterclockwise, it moves forward and rotates simultaneously via a linkage mechanism. That is, the base frame 30 rotates in the positive direction and moves forward toward the passageway side in a manner that does not interfere with the wall A.

[0115] When Figure 15 (c) When the underframe 30 reaches a cross position (rotation angle 90°), at Figure 10In this configuration, the locking pin 61 of the rotary locking mechanism 60 is engaged in the locking hole 62b located on one short side of the base frame 30. Thus, the base frame 30 (seat 1) is constrained to prevent rotation in a crossed state.

[0116] <<Transition from a crossover state to an anti-crossover state>>

[0117] exist Figure 15 (c) In the crossed state shown, after the constraint of the rotation locking mechanism 60 is released, when the base frame 30 is moved in the opposite direction ( Figure 15 When the base frame 30 rotates clockwise, it moves backward or forward simultaneously via a linkage mechanism. Then, as... Figure 15 As shown in (d), when the base frame 30 is temporarily held in a position that has moved forward in a state parallel to its longitudinal direction, it does not move forward or backward as before, but instead rotates in the opposite direction as before.

[0118] When Figure 15 When the base frame 30 is brought to the reverse cross position (rotation angle -90°) as shown in (e), the locking pin 61 of the rotation locking mechanism 60 engages with the locking hole 62c on the other short side of the base frame 30, and the base frame 30 is again restrained from rotating. This conversion of the seat 1 from a cross position to a reverse cross position is not limited to foot pedal operation, but can also be performed by electric operation of the motor 41. Furthermore, in order to return the seat 1 from the reverse cross position to a cross position, and further from a cross position to the original longitudinal position, it is only necessary to perform the opposite actions to the conversion from the longitudinal position to a cross position and from a cross position to a reverse cross position, respectively.

[0119] <<Constraints on the reclining operation of backrest 3>>

[0120] When seat 1 is in the longitudinal position, the reclining operation of the reclining operation unit 100 is disabled by the reclining operation locking mechanism 120. That is, when seat 1 is switched to the longitudinal position, as... Figure 12 As shown, the engaging part 207 is displaced relative to the engaging part 211 located on the base 11. Here, the engaging part 207 is displaced about the pivot 203 in the direction that causes the foot pedal 204 to swing upward. As the engaging part 207 is displaced, the tilting locking cable 124 connected to the engaging part 207 is pulled.

[0121] Figure 1 In (a), when the tilt-back locking cable 124 is pulled, the limiter 121 overcomes the force of the spring component 123 by disengaging from the unrestrained position of the abutment part 113 of the operating lever 110, such as... Figure 1(b) The lever moves linearly to the constrained position where it engages with the contact part 113. As a result, the operating lever 110 cannot swing the operating part 112 upward while maintaining its normal initial position, and is constrained to be inoperable, preventing the backrest 3 from tilting back via the reclining mechanism 50.

[0122] With this reclining operation locking mechanism 120, in the longitudinal position, it can reliably prevent the seated person from reclining the backrest 3, and can prevent the backrest 3 from accidentally tilting and interfering with the wall A. The reclining operation locking mechanism 120 only consists of a limiter 121 that is directly pulled by the reclining locking cable 124, and does not require special mechanisms such as a connecting rod that allows the limiter 121 to move linearly.

[0123] Therefore, the number of parts in the tilt-down locking mechanism 120 is reduced, and the structure is simplified and miniaturized, resulting in cost reduction and space reduction. Furthermore, the limiter 121 is not indirectly pulled by the tilt-down locking cable 124 via a connecting rod or other components, but is directly connected to the tilt-down locking cable 124 and pulled directly. Therefore, there is no concern about insufficient pulling due to deterioration of components other than the tilt-down locking cable 124, ensuring reliable movement.

[0124] Furthermore, the limiter 121 moves linearly in the front-to-back direction on the approximately horizontal bottom wall 103 of the housing 101. Additionally, the tilt-lock cable 124, directly connected to the limiter 121, also extends linearly in the same direction on the same horizontal plane where the limiter 121 moves linearly. Therefore, the tilt-operation locking mechanism 120 does not have any structures or movements that increase in the vertical direction, thus significantly reducing the height dimension. Therefore, a handrail 5 with a thickness that reduces the vertical dimension of the tilt-operation locking mechanism 120 can be attached to the upper end of the side arrangement portion 4.

[0125] <<Removal of constraints on the reclining operation of backrest 3>>

[0126] When seat 1 is switched to the crossed position, the constraint of the reclining operation locking mechanism 120 on the reclining operation part 100 is released. That is, in the crossed position of seat 1, as... Figure 11 As shown, the engaging portion 207 of the foot pedal 204 located on the moving platform 20 is not engaged with the engaging portion 211 located on the base 11, but is separated. Therefore, the foot pedal 204 is in the use position where it protrudes forward due to the elastic force of the spring member 205, and the backward locking cable 124 is not pulled.

[0127] Therefore, as Figure 1As shown in (a), in the tilt-back operation locking mechanism 120, the limiter 121 moves linearly forward to a non-restrained position, disengaged from the contact portion 113 of the operating lever 110, by the force of the spring member 123. Thus, the constraint preventing the operating lever 110 from operating is released, and the tilt-back operation becomes possible. That is, as... Figure 4 As shown, the seated person can tilt the operating part 112 of the operating lever 110 upwards to recline, and can tilt the backrest 3 to any angle, thus ensuring good seating comfort.

[0128] Furthermore, when the operating part 112 of the operating lever 110 swings to the upper operating position, the tilt-lock cable 124, which passes through the groove 114 of the abutment part 113, is pressed downward midway. The displacement of the tilt-lock cable 124 is set within a range that can be absorbed by the clearance of the tilt-lock cable 124. Therefore, it does not affect the operation of the rotating operating part 200 located in front of the tilt-lock cable 124.

[0129] <<Constraints on the rotation operation of seat 1>>

[0130] like Figure 10 As shown, when the seat 1 is in its longitudinal position, the base frame 30 is constrained relative to the moving platform 20 by means of the rotation locking mechanism 60. That is, the locking pin 61 of the rotation locking mechanism 60 is inserted into the locking hole 62a located on one long side of the base frame 30. Here, the locking pin 61 protrudes from the base 11, which serves as the fixed side of the seat 1, so the seat 1 is not only unable to rotate, but is also constrained to not move forward or backward.

[0131] like Figure 6 As shown, when the seat 1 is in its longitudinal position, the rotation operation blocking mechanism 210 prevents the release operation of the rotation operation unit 200 from being performed. That is, in the longitudinal position, the moving platform 20 retracts (approaches) to the wall A to its maximum extent, and the front end of the moving platform 20 overlaps with the front end of the base 11. Based on this positional relationship, as... Figure 12 As shown, the engaging portion 207 of the foot pedal 204 on the moving platform 20 engages with the engaging portion 211 on the base 11. Thus, the foot pedal 204 overcomes the force of the spring member 205, swings to the standing, retracted position, and is restrained in that position.

[0132] Therefore, when the seat 1 is in its longitudinal position, the footrest 204 not only moves to a non-operable storage position, but is also securely held in the storage position by the engagement between the engaging part 211 and the engaged part 207. Thus, in the longitudinal position, the rotation operation part 200 cannot be released. With this simple structure, in the longitudinal position, the user can reliably prevent the seat 1 from being rotated.

[0133] <<Release of constraints on the rotation operation of seat 1>>

[0134] When seat 1 is in the crossed position, the constraint of the rotation operation preventing mechanism 210 on the inoperability of the rotation operation part 200 is also released. That is, in Figure 15 In the crossed state shown in (c), the moving stage 20 advances (separates) to its maximum extent from the wall A side, with the front end of the moving stage 20 positioned further forward than the front end of the base 11. In this positional relationship, as... Figure 11 As shown, the engaging portion 207 of the foot pedal 204 on the moving platform 20 is not engaged with the engaging portion 211 on the base 11, but is instead separated. Therefore, the foot pedal 204 is positioned in a forward-protruding use position by the force of the spring member 205.

[0135] At this time, the person sitting in seat 1 can release the constraint of the rotation locking mechanism 60 by stepping on the foot pedal 204. That is, Figure 11 In the middle, when the foot pedal 204 is pressed down and swings downward, the rotating operation cable 206 is pulled, and the locking pin 61 (see reference) Figure 13 As the seat is lowered, the locking mechanism 60 is released. This allows the seat occupant to manually rotate the seat 1.

[0136] <Structure and Effects of the Invention>

[0137] The embodiments of the present invention have been described above, but the present invention is not limited to the embodiments described above. The present invention derived from the embodiments described above will be described below.

[0138] First, the present invention is a seating device 10, which is capable of changing the state of a seat 1, characterized in that it comprises:

[0139] The reclining mechanism 50 allows the backrest 3 of the seat 1 to tilt back;

[0140] The operation unit 100 performs the operation of tilting the backrest 3 by means of the aforementioned reclining mechanism 50;

[0141] The locking mechanism 120, when the seat 1 is in a specific state, restricts the operation part 100 from operation; and

[0142] Cable 124 is pulled as seat 1 changes to the aforementioned specific state.

[0143] The aforementioned operating unit 100 can be displaced from its normal initial position to its operating position during operation.

[0144] The locking mechanism 120 has a limiter 121 that engages with the operating part 100 located in the initial position via linear movement.

[0145] The aforementioned limiter 121 is directly pulled by the aforementioned cable 124, moving linearly from its normal unconstrained position, which is detached from the aforementioned operating part 100, to a constrained position, which engages with the aforementioned operating part 100 and prevents the aforementioned operating part 100 from operating.

[0146] In this locking mechanism 120, the limiter 121 is directly pulled by the cable 124 and moves linearly to a constrained position where it engages with the operating part 100 of the tilting mechanism 50, thus preventing the operating part 100 from operating. Therefore, special mechanisms such as connecting rods for moving the limiter 121 are not required, the number of parts is reduced, the structure is simplified and miniaturized, and cost reduction and space reduction are achieved.

[0147] Furthermore, the limiter 121 is not pulled indirectly via cable 124 through connecting rods or other components, but is directly connected to cable 124 and pulled directly. Therefore, there is no concern that insufficient pulling may occur due to deterioration of components other than cable 124, allowing it to move reliably.

[0148] Furthermore, as a feature of this invention,

[0149] The aforementioned limiter 121 is supported in a state where it can move linearly in the front-back direction of the seat 1 on a generally horizontal plane.

[0150] Therefore, the structure and operation of the tilt-back locking mechanism 120, which do not increase in the vertical direction, can be configured more compactly in terms of height. As a result, space-saving requirements can be further met in the configuration space of the side arrangement part 4 (armrest 5) where the tilt-back locking mechanism 120 is installed, and the degree of design freedom can also be increased.

[0151] Furthermore, as a feature of this invention,

[0152] The aforementioned limiter 121 is normally held in the aforementioned unconstrained position by the force application unit 123. On the other hand, when pulled by the aforementioned cable 124, it moves linearly to the aforementioned constrained position against the force of the aforementioned force application unit 123 and is held in the constrained position.

[0153] In this way, by using the force of the force-applying unit 123 to keep the limiter 121 in the unconstrained position, it can be easily maintained in the unconstrained position with a simple structure without the use of power. In addition, by simply pulling the limiter 121 with the cable 124, it can be easily moved linearly to the constrained position against the force of the force-applying unit 123 and reliably maintained in the constrained position.

[0154] Furthermore, as a feature of this invention,

[0155] The aforementioned operating unit 100 has an operating lever 110 located at the front end of the armrest 5 of the seat 1, which is supported and can swing to the aforementioned initial position and the aforementioned operating position.

[0156] The aforementioned operating lever 110 has an abutment portion 113 on the other end, which clamps the swing center in the middle relative to the end where it is operated, and which can disengage from the aforementioned limiter 121.

[0157] The cable 124 is arranged with a straight portion at one end passing through the contact portion 113 of the operating lever 110, and is directly connected to the limiter 121 located in front of the contact portion 113.

[0158] Thus, the operating part 100 of the reclining mechanism 50, with an operating lever 110 located at the front end of the armrest 5 of the seat 1, allows the seated person to easily operate it while maintaining a seated posture. The operating lever 110 has its swing center in the middle, with one end being the operating part (operating part 112) and the other end being the abutment part 113 that engages with the limiter 121. The cable 124 is arranged to pass through the abutment part 113 (groove 114) of the operating lever 110 and is directly connected to the limiter 121 located in front of the abutment part 113.

[0159] With this structure, the limiter 121 is positioned between one end and the other end of the operating lever 110, and the cable 124 is arranged to overlap with the other end of the operating lever 110. Therefore, the operating part 100 and the locking mechanism 120 can be configured more compactly as a whole. Furthermore, by aligning the direction in which the limiter 121 is pulled with the direction of its linear movement, the limiter 121 can be reliably moved with less force.

[0160] Furthermore, as a feature of the present invention, it is characterized by having:

[0161] Rotating mechanism 40, which causes seat 1 to rotate about a rotation axis; and

[0162] The sliding mechanism 14 causes the seat 1 to move forward and backward together with the aforementioned rotating mechanism 40 from the fixed side.

[0163] Through the linkage between the aforementioned rotating mechanism 40 and the aforementioned sliding mechanism 14, the state of the seat 1 can be changed to:

[0164] The back of seat 1 runs roughly parallel to the longitudinal length of the wall; and

[0165] A cross-shaped state separating from the wall, roughly orthogonal to the aforementioned longitudinal state.

[0166] The specific state of seat 1 described above is the longitudinal state described above.

[0167] Therefore, as described in the above embodiments, this seat device 10 can be applied to a typical bench-type rotating seat mounted on a rail vehicle. Furthermore, when the seat 1 is in its longitudinal position, the back of the backrest 3 is approximately parallel to and close to the wall A; therefore, as described above, the locking mechanism 120 is required to prevent the operation of the reclining mechanism 50's operating section 100 from functioning.

[0168] Furthermore, as a feature of the present invention, it is characterized by having:

[0169] The base 11 serves as the fixed side of the seat 1;

[0170] The movable platform 20 is able to move forward and backward on the base 11 via the sliding mechanism 14, and can rotatably support the seat 1 via the rotating mechanism 40.

[0171] The engaging part 211 is provided on the base 11; and

[0172] The engaging part 207 is provided on the aforementioned movable platform 20, and when the seat 1 is in the aforementioned longitudinal state, it engages with the aforementioned engaging part 211 and is displaced.

[0173] The aforementioned locking portion 207 and the aforementioned limiter 121 are connected by the aforementioned cable 124, and the aforementioned cable 124 is pulled based on the displacement of the aforementioned locking portion 207.

[0174] Thus, according to this seat assembly 10, due to the mechanical engagement between the engaging part 211 and the engaged part 207, the limiter 121 can be moved via the cable 124. With this simple structure, without using electric power, the reclining operation can be restricted only in a specific state of the seat 1, namely the longitudinal state.

[0175] <Other structural features and effects of the present invention>

[0176] Furthermore, based on the above embodiments, the following other inventions are also derived.

[0177] Seat 1 is rotatable about a rotation axis, characterized in that it comprises:

[0178] A rotary locking mechanism 60 is capable of restraining the seat 1 according to multiple rotation angles;

[0179] The rotating operating unit 200 performs the operation of releasing the constraint of the aforementioned rotating locking mechanism 60; and

[0180] The rotation operation prevention mechanism 210 prevents the release operation of the aforementioned rotation operation unit 200 from being performed when the seat 1 is in a specific state of rotation angle.

[0181] The aforementioned rotation operation prevention mechanism 210 includes:

[0182] The engaging part 211 is provided on the fixed side of the seat 1; and

[0183] The engaging part 207 is provided on the movable side of the seat 1 in the aforementioned rotation operation part 200, and engages with the engaging part 211 when the seat 1 is in the aforementioned specific state, thereby preventing the release operation of the aforementioned rotation operation part 200 from being performed.

[0184] In this seating arrangement 10, when the seat 1 is in a specific state, namely the longitudinal state, the back of the seat is close to the wall A, but the seat occupant cannot rotate the seat 1 in a way that prevents the passenger from changing their posture at will. Here, rotation of the seat 1 requires the rotation operation unit 200 to release the constraint of the rotation locking mechanism 60. Therefore, by using the rotation operation blocking mechanism 210 to prevent the operation of the rotation operation unit 200, the rotation of the seat 1 can be prevented.

[0185] In the rotation operation prevention mechanism 210, when the seat 1 is in its longitudinal position, the engaging portion 207 on the movable side of the seat 1, located in the rotation operation section 200, engages with the engaging portion 211 on the fixed side of the seat 1, thereby preventing the release operation of the rotation operation section 200. Through this mechanical engagement between the engaging portion 211 and the engaging portion 207, without the use of electric power, and with a simple structure, the rotation of the seat 1 by the seated person can be prevented only when the seat 1 is in its longitudinal position.

[0186] The embodiments have been described above with reference to the accompanying drawings, but the specific structure is not limited to these embodiments. Modifications and additions that do not depart from the spirit of the invention are also included in the invention. For example, seat 1 is described as a seat for two people, but it can also be a seat for three people or one person.

[0187] Furthermore, the specific shapes of the operating lever 110 of the reclining operation unit 100 and the limiter 121 of the reclining operation locking mechanism 120 are not limited to the shapes shown in the figure. Additionally, the specific shapes of the base 11, the moving platform 20, and the base frame 30 are not limited to the shapes shown in the figure. Moreover, the changing state of the seat is not limited to a longitudinal state, a cross-shaped state, or a reverse cross-shaped state.

[0188] Industrial availability

[0189] In addition to seats in passenger compartments of vehicles such as rail vehicles, aircraft, automobiles, and ships, this invention can also be widely used as a seating device for theaters, homes, and offices.

[0190] Symbol Explanation

[0191] 10—Seat assembly, 11—Base, 14—Sliding mechanism, 20—Moving platform, 30—Base frame, 40—Rotating mechanism, 50—Tilt-back mechanism, 60—Rotating locking mechanism, 100—Tilt-back operating part, 110—Operating lever, 111—Pivot, 112—Operating part, 113—Abutting part, 116—Tilt-back operating cable, 120—Tilt-back operating locking mechanism, 121—Limiter, 122—Shaft, 123—Spring component, 124—Tilt-back locking cable, 200—Rotating operating part, 204—Foot pedal, 207—Interlocking part, 210—Rotating operation blocking mechanism, 211—Interlocking part.

Claims

1. A seating device (10) capable of changing the state of a seat (1), characterized in that, have: The reclining mechanism (50) enables the backrest (3) of the seat (1) to tilt back; The operating unit (100) performs the operation of tilting the backrest (3) by means of the reclining mechanism (50); The locking mechanism (120) restrains the operating part (100) from operation when the back of the seat (1) is in a specific state that is substantially parallel to the wall; as well as Cable (124), which is pulled as the seat (1) transitions to the specific state, The operating unit (100) can be displaced from its normal initial position to its operating position during operation. The locking mechanism (120) has a limiter (121) that engages with the operating part (100) located in the initial position by linear movement. The limiter (121) is directly pulled by the cable (124) from its normal unconstrained position, which is detached from the operating part (100), to a constrained position, where it is engaged with the operating part (100) and cannot be operated. The operating unit (100) has an operating lever (110) located at the front end of the armrest (5) of the seat (1), which is supported to swing to the initial position and the operating position. The operating lever (110) has an abutment part (113) on the other end, which is positioned at the center of the swing relative to the operated end, and is designed to engage with the limiter (121). The cable (124) is configured such that a straight portion of one end passes through the abutment portion (113) of the operating lever (110) and is directly connected to the limiter (121) located in front of the abutment portion (113).

2. The seat device (10) according to claim 1, characterized in that, The limiter (121) is supported to move linearly along the front-rear direction of the seat (1) on a generally horizontal plane.

3. The seating device (10) according to claim 1, characterized in that, The limiter (121) is normally held in the unconstrained position by the force application unit (123), but when pulled by the cable (124), it moves linearly to the constrained position against the force of the force application unit (123) and is held in the constrained position.

4. The seat device (10) according to claim 2, characterized in that, The limiter (121) is normally held in the unconstrained position by the force application unit (123), but when pulled by the cable (124), it moves linearly to the constrained position against the force of the force application unit (123) and is held in the constrained position.

5. The seating device (10) according to any one of claims 1 to 4, characterized in that, have: Rotating mechanism (40), which causes seat (1) to rotate about a rotation axis; and A sliding mechanism (14) allows the seat (1) to move forward and backward together with the rotating mechanism (40) from the fixed side. Through the linkage between the rotating mechanism (40) and the sliding mechanism (14), the state of the seat (1) can be changed to: The back of the seat (1) runs roughly parallel to the longitudinal length of the wall; and A cross-shaped state separating from the wall, approximately orthogonal to the longitudinal state. The specific state of the seat (1) is the longitudinal state.

6. The seating device (10) according to claim 5, characterized in that, have: The base (11) is the fixed side of the seat (1); The movable platform (20) is able to move forward and backward on the base (11) via the sliding mechanism (14) and can rotatably support the seat (1) via the rotating mechanism (40); A locking part (211) is provided on the base (11); as well as The engaging part (207), which is provided on the moving platform (20), engages with the engaging part (211) and displaces when the seat (1) is in the longitudinal state. The engaging part (207) and the limiter (121) are connected by the cable (124), and the cable (124) is pulled based on the displacement of the engaging part (207).

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