WO2023243713A1

WO2023243713A1 - Seat-state changing device, vehicle seat, and vehicle

Info

Publication number: WO2023243713A1
Application number: PCT/JP2023/022411
Authority: WO
Inventors: 陽木井川; 和大三柴
Original assignee: テイ・エステック株式会社
Priority date: 2022-06-17
Filing date: 2023-06-16
Publication date: 2023-12-21

Abstract

This seat-state changing device comprises: a first unlock mechanism that, upon receipt of an operating force, of a user, of a first operation member or an operating force of a second operation member, unlocks a first lock part that secures a seat back in an upright posture against an urging force of a first urging part; a second unlock mechanism that, as a consequence of tilting of the seat back by the unlocking of the first lock part, unlocks a second lock part that secures a seat cushion in a horizontal posture against an urging force of a second urging part; and a cancel mechanism that, upon receipt of the operating force of the second operation member, disables unlocking of the second lock part by the second unlock mechanism that occurred as a consequence of the tilting of the seat back.

Description

Seat condition changing devices, vehicle seats and vehicles

The present invention relates to a seat state changing device that changes the state of a seat, a vehicle seat, and a vehicle.

Conventionally, this type of device has been designed to sequentially change the seat state by rotating a control lever, such as a state in which the seat back is folded forward, and a state in which the seat is flipped up while the seat back is folded forward. A device configured as follows is known (for example, see Patent Document 1). In the device described in Patent Document 1, if the user stops rotating the control lever while the seatback is being folded forward, the seatback is folded forward without the seat being flipped up. is maintained.

Patent No. 5141680

In the device described in Patent Document 1, depending on whether or not to stop rotating the operating lever while the seatback is being folded forward, the seat can be placed in either a state where the seatback is folded forward or a state where the seat is flipped up. The state can be switched. For this reason, there is a possibility that the user may make a mistake in timing the rotation of the operating lever and switch to the wrong seat state.

One aspect of the present invention provides a seat cushion that is provided so that its posture can be changed between a horizontal posture that extends in a substantially horizontal direction and a vertical posture that extends in a substantially vertical direction, and a seat cushion that is rotatable about an axis. and a seat back that can change its posture between an upright position standing up from the seat cushion that is in a horizontal position and a folded position that is tilted toward the horizontal position of the seat cushion. This is a seat state changing device that changes to a seat state. The predetermined seat states include a first state in which the seat cushion is in a horizontal position and the seat back is in an upright position, a second state in which the seat cushion is in a horizontal position and the seat back is in a folded position, and a second state in which the seat cushion is in a horizontal position and the seat back is in a folded position. is in a vertical position and the seat back is in a folded position. The seat state changing device includes a first biasing part that biases the seatback so that the seatback is in a folded position, and a first biasing part that fixes the seatback in an upright position against the biasing force of the first biasing part. a lock part, a second biasing part that biases the seat cushion so that the seat cushion is in a vertical position, and a second lock part that fixes the seat cushion in a horizontal position against the biasing force of the second biasing part. a first operating member and a second operating member to which the user inputs operating force, respectively; and a first lock that releases the first locking portion in response to the operating force of the first operating member or the operating force of the second operating member. A release mechanism, a second lock release mechanism that releases the second lock part when the seat back is folded due to the release of the first lock part, and a second lock release mechanism that releases the second lock part when the seat back is folded due to the release of the first lock part; and a cancel mechanism that invalidates the release of the second lock portion by the second lock release mechanism.

Another aspect of the present invention is a vehicle seat including the seat state changing device described above.

Yet another aspect of the present invention is a vehicle equipped with the above-mentioned vehicle seat.

According to the present invention, it is possible to prevent the handle from contacting the rear wheel and getting dirty in the folded position.

1 is a perspective view showing a schematic configuration of a vehicle seat to which a seat state changing device according to an embodiment of the present invention is applied. FIG. 1B is a side view showing an example of a vehicle in which the seat of FIG. 1A is mounted. FIG. 1A is a side view showing a schematic configuration of a connecting portion between a seat cushion frame and a seat back frame shown in FIG. 1A. FIG. 2 is a side view schematically showing a typical seat state obtained by the seat state changing device according to the embodiment of the present invention. 1 is a front view schematically showing an example of a reclining mechanism included in a seat state changing device according to an embodiment of the present invention. FIG. 3 is a side view showing the configuration of a locking portion of a tumble mechanism included in a seat state changing device according to an embodiment of the present invention. FIG. 4B is a side view showing an example of the operation following FIG. 4A. FIG. 4B is a side view showing an example of the operation following FIG. 4B. FIG. 2 is a perspective view showing a main part configuration of an interlocking mechanism included in a seat state changing device according to an embodiment of the present invention. FIG. 5 is a view of arrow VI in FIG. FIG. 6 is an exploded perspective view of the interlocking mechanism shown in FIG. 5; FIG. 7 is a side view showing an example of the operation of the interlocking mechanism while the seat back is in the upright position to the folded position. FIG. 8A is a side view showing an example of the operation following FIG. 8A. FIG. 7 is a side view showing an example of the operation when the cancel mechanism is activated. FIG. 8C is a side view showing an example of the operation following FIG. 8C. 1A is a diagram showing a connection state of a plurality of cables arranged on the sheet of FIG. 1A. FIG. The figure which shows the modification of an operation lever. The figure which shows the other modification of an operation lever. FIG. 2 is a perspective view of the rear seat of the vehicle. FIG. 12 is a plan view of an armrest frame constituting the armrest of FIG. 11 and its surroundings. View XIII in FIG. 12.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1A to 10B. The seat state changing device according to this embodiment is applied to a vehicle seat, which is an example of a vehicle seat. Note that the seat state changing device can be applied to other vehicle seats, and can also be applied to things other than vehicle seats.

FIG. 1A is a perspective view showing a schematic configuration of a vehicle seat (hereinafter sometimes simply referred to as a seat) 100 to which a seat state changing device according to the present embodiment is applied. Hereinafter, the front-rear direction, left-right direction, and up-down direction will be defined based on the occupant seated on the seat 100 as shown in the drawing. The front-rear direction, left-right direction, and up-down direction of the seat 100 are the same as the front-rear direction, left-right direction, and up-down direction of the vehicle, but may not be the same.

FIG. 1B is a side view of a vehicle 210 to which the seat 100 according to the present embodiment is applied. The vehicle 210 has, for example, three rows of seats in the longitudinal direction of the vehicle. Among these three rows of seats, for example, the seat 100 installed in the second row is the seat 100 in FIG. 1A. Note that, among the seats installed in the second row, FIG. 1A particularly shows a seat 100 installed on the left side of the vehicle. Therefore, on the left side of the seat 100, a door 211 is provided for passengers in the second row of seats and passengers in the third row of seats to get in and out of the vehicle. When a passenger gets on the third row seat, the seat 100 is folded from the seated state shown in FIG. 1A. Note that the seat installed on the right side of the vehicle can be configured laterally symmetrically with the seat 100 in FIG. 1A. Below, the configuration of each part of the seat 100 installed on the left side of the vehicle will be explained.

As shown in FIG. 1A, the seat 100 includes a seat cushion 1 that supports the buttocks of the occupant, a seat back 2 that supports the waist and back of the occupant, and a headrest 3 that supports the head of the occupant. The seat cushion 1 has a seat cushion frame 10 that forms the skeleton of the seat cushion 1, and the seat back 2 has a seat back frame 20 that forms the skeleton of the seat back 2. The periphery of the seat cushion frame 10 is covered with a pad, and the surface of the pad is further covered with a skin. Similarly, the periphery of the seat back frame 20 is covered with a pad, and the surface of the pad is further covered with a skin.

The seat cushion frame 10 includes a pair of left and right side frames 11 that extend in the front-rear direction, and a pair of front and rear connection frames 12 that extend in the left-right direction and connect the left and right side frames 11 to each other. The seat back frame 20 includes a pair of left and right side frames 21 that extend in the vertical direction, and a pair of upper and lower connection frames 22 that extend in the left and right direction and connect the left and right side frames 21 to each other. Although not shown, there are support members (spring members) for supporting the occupant seated on the seat 100 between the left and right side frames 11 of the seat cushion frame 10 and between the left and right side frames 21 of the seat back frame 20. panels, panel members, etc.) are installed in the left-right direction.

A pair of front and rear bases (a front base 13 and a rear base 14) are provided at the lower ends of the left and right side frames 11 of the seat cushion frame 10.

Support parts

201 and 202 are provided on the floor 200 below the seat 100 at positions corresponding to the

base parts

13 and 14, respectively. Seat cushion frame 10 is supported by floor 200 via

base portions

13 and 14 and

support portions

201 and 202. A slide mechanism is provided between the side frame 11 and the

bases

13 and 14 to support the seat cushion frame 10 so as to be slidable in the front and rear directions.

The seat back frame 20 is rotatably connected to the seat cushion frame 10 in the front-rear direction about an axis CL1 extending in the left-right direction. FIG. 1C is a side view showing a schematic configuration of a connecting portion between the seat cushion frame 10 and the seat back frame 20. As shown in FIG. 1C, a substantially plate-shaped lower bracket 15 is fixed to the rear end portions of the left and right side frames 11 of the seat cushion frame 10 by welding or the like. A substantially plate-shaped upper bracket 25 is fixed to the lower ends of the left and right side frames 21 of the seat back frame 20 by welding or the like.

The lower bracket 15 extends rearward and above the side frame 11 along a vertical plane extending in the front-rear direction, more specifically, to a position facing the upper bracket 25. The upper bracket 25 extends downward along a vertical plane extending in the front-rear direction so as to cover the lower end portion of the side frame 21 . The lower bracket 15 is disposed outside the upper bracket 25 in the left-right direction, substantially parallel to the upper bracket 25, and with a predetermined gap spaced from the upper bracket 25 in the left-right direction. Note that, instead of configuring the lower bracket 15 as a separate member from the side frame 11, the side frame 11 may be provided with a bracket portion that functions as the lower bracket 15. Instead of configuring the upper bracket 25 as a separate member from the side frame 21, the side frame 21 may be provided with a bracket portion that functions as the upper bracket 25.

In a region where the lower bracket 15 and the upper bracket 25 overlap in a side view, a shaft portion 33 is provided to extend so as to pass through the lower bracket 15 and the upper bracket 25 in the left-right direction. The shaft portion 33 is located above the seat surface 1a of the seat cushion 1. Thereby, the seat back frame 20 is supported by the seat cushion frame 10 via the shaft portion 33 so as to be rotatable in the front-rear direction.

As shown in FIG. 1A, the front base portion 13 of the seat cushion frame 10 is rotatably supported by the support portion 201 in the front-rear direction about an axis CL2 extending in the left-right direction. On the other hand, the rear base portion 14 is supported by the support portion 202 so as to be detachable from the support portion 202 . When the rear base portion 14 separates from the support portion 202, the seat cushion 1 rotates forward about the axis CL2 and becomes able to stand up on the floor 200.

An operating lever 101 that can be operated upward (in the direction of arrow A) is provided on the left side of the upper end of the seat back 2 (left side of the headrest 3), that is, on the door side. At the center of the front end of the seat cushion 1, an operating lever 102 that can be operated forward (in the direction of arrow B) is provided. Below, for convenience, the operating lever 101 may be referred to as an upper operating lever, and the operating lever 102 may be referred to as a lower operating lever. The upper operation lever 101 can be easily operated by an occupant who intends to enter the third row seat from the left side of the seat 100 via the door 211 (FIG. 1B), and an occupant who attempts to exit from the third row seat. The lower operation lever 102 can be easily operated by a passenger seated on the second row seat 100.

A vehicle can realize various seat arrangements by changing the seat condition. The seat state is changed according to the operation of the operation levers 101 and 102. FIG. 2 is a side view schematically showing a typical sheet state of the sheet 100. As shown in FIG. 2, the seat state of the seat 100 can be changed to a seated state, a forward-folded state, and a tumbled state.

In the seated state, the seat cushion 1 is in a horizontal position with the seat surface 1a extending substantially horizontally, and the seat back 2 is in an upright position standing up from the seat cushion 1. At this time, the angle formed between the seat surface 1a and the passenger support surface 2a (front surface) of the seat back 2 is, for example, about 90° to 120°. Note that the seating state is a state in which the occupant can sit on the seat 100. Therefore, the seat back 2 only needs to stand up to the extent that the occupant can sit on it, and the angle between the seat surface 1a and the support surface 2a may be less than 90 degrees or greater than 120 degrees.

The seat back frame 20 (upper bracket 25 in FIG. 1C) is rotatably connected to the seat cushion frame 10 (lower bracket 15 in FIG. 1C) via a reclining mechanism 30. The reclining mechanism 30 includes a spring S1 (shown in the form of a spiral spring for convenience in FIG. 2) that biases the seatback 2 forward (in the direction of arrow A), and a spring S1 that biases the seatback 2 forward (in the direction of arrow A), and a spring S1 that freely rotates the seatback 2 against the biasing force of the spring S1. It has a locking portion R1 that is fixed at the rotational position. Note that the spring S1 can also be configured by a torsion spring or a coil spring.

The operation of the lock portion R1 can be released by operating the operating levers 101, 102 (FIG. 1A). The specific configuration of the reclining mechanism 30 will be described later. When a user (occupant or non-occupant) releases the operation of the lock portion R1 by operating the operating levers 101 and 102, the seat back 2 is rotated forward to the maximum due to the biasing force of the spring S1. As a result, the seat 100 is folded and placed in a forward position. In the forward folded state, the seat back 2 assumes a substantially horizontal folded position, and the seat surface 1a of the seat cushion 1 and the support surface 2a of the seat back 2 face each other.

The seat cushion frame 10 is supported by the

support parts

201 and 202 of the floor 200 via the tumble mechanism 40 so as to be rotatable forward. When the seat cushion frame 10 rotates forward (in the direction of arrow B) with the seat back 2 in the folded position (folded forward), the seat cushion 1 assumes a vertical position with the seat surface extending substantially vertically, and the seat 100 It becomes a tumble state.

The tumble mechanism 40 has a rotation mechanism 41 that rotatably connects the front base 13 of the seat cushion frame 10 (side frame 11) and the support portion 201 of the floor 200 about the axis CL2. The rotation mechanism 41 includes a shaft portion 42 that extends in the left-right direction along the axis CL2 and passes through the front base portion 13 and the support portion 201, and a spring S2 that urges the seat cushion 1 forward (in the direction of arrow B). (For convenience, it is shown in the form of a spiral spring in FIG. 2). Note that the spring S2 can also be configured by a torsion spring or a coil spring.

The tumble mechanism 40 further includes a lock portion R2 that locks the rear base portion 14 of the seat cushion frame 10 to the support portion 202 of the floor 200. When the lock portion R2 is activated, the seat cushion 1 is prevented from rotating forward, and the seat is held in the forward position. When the lock portion R2 is released, the rear base portion 14 is released from the support portion 202. As a result, the seat cushion 1 rotates forward due to the biasing force of the spring S2, and the seat 100 becomes in a tumble state. The specific configuration of the lock portion R2 will be described later.

The seat 100 further includes an interlocking mechanism located near the connecting portion between the lower bracket 15 and the upper bracket 25, that is, around the axis CL1, for releasing the operation of the locking portion R2 in conjunction with the forward rotation of the seatback 2. A mechanism 50 is provided. When the seat back 2 is tilted and the angle formed by the seat surface 1a of the seat cushion 1 and the support surface 2a of the seat back 2 becomes less than a predetermined angle, the interlocking mechanism 50 is operated to release the lock portion R2. Therefore, by releasing the lock portion R1 of the reclining mechanism 30 by operating the lever, the seat state can be sequentially shifted from the seated state to the forward-folded state and then to the tumble state. That is, by operating a single lever, the seat 100 can be changed from a seated state to a forward-folded state and then to a tumble state.

The seat state changing device according to this embodiment includes the reclining mechanism 30, the tumble mechanism 40, and the interlocking mechanism 50, as described above. In particular, by having the interlocking mechanism 50, the seat 100 in the seated state can be easily changed to the tumble state. By the way, in order to realize a variety of seat arrangements, it is preferable to maintain the seat state not only in the seated state and the tumble state, but also in the forward-folded state. However, when the interlocking mechanism 50 operates, the seat state is changed from the seated state to the tumble state, so it is difficult to maintain the seat state in the forward position. Therefore, in this embodiment, the seat state changing device is configured as follows so that the seat state can be easily maintained in the forward position.

First, the specific configuration of the reclining mechanism 30 will be explained. The reclining mechanism 30 is provided, for example, between the left lower bracket 15 and the upper bracket 25, that is, between the right end surface of the lower bracket 15 and the left end surface of the upper bracket 25. FIG. 3 is a front view (view from the left) schematically showing an example of the reclining mechanism 30, and mainly shows the configuration of the lock portion R1 (FIG. 2). Note that illustration of the spring S1 (FIG. 2) is omitted.

As shown in FIG. 3, the reclining mechanism 30 includes a lower plate 31 (only the protrusions 31a are shown) that is fixed to the right end surface of the lower bracket 15 and has four protrusions 31a in the circumferential direction that protrude to the right, and an upper bracket. An upper plate 32 (only a substantially ring-shaped portion protruding leftward is shown) fixed to the left end surface of 25 and a shaft portion 33 (extending along axis CL1 and penetrating lower plate 31 and upper plate 32) 1C), a cam plate 34 arranged in the space between the lower plate 31 and the upper plate 32 and rotating together with the shaft part 33, a pair of upper and lower locking members 35 arranged in the space, and a cam plate 34 in the direction of arrow A. The lower plate 31, the upper plate 32, and the shaft portion 33 are shown by hatching for convenience to distinguish them from other parts.

The pair of upper and lower lock members 35 engages with a guide groove 31b between the front and rear protrusions 31a of the lower plate 31, and are movable in the vertical direction, that is, radially inward and radially outward, along the guide groove 31b. . The locking member 35 has a cam portion on its inner diameter side end surface, and external teeth 35a on its outer diameter side end surface. The upper plate 32 has internal teeth 32a formed on the inner peripheral surface in the circumferential direction. The external teeth 35a of the locking member 35 engage with the internal teeth 32a of the upper plate 32 when moved radially outward. The cam plate 34 engages with the lock member 35, and when the cam plate 34 rotates in the direction of arrow A due to the urging force of the torsion spring 36 as shown, the lock member 35 moves radially outward. As a result, the external teeth 35a mesh with the internal teeth 32a, and the rotational position of the upper bracket 25 with respect to the lower bracket 15 is fixed (reclining lock). That is, the lock member 35 constitutes a lock portion R1 (FIG. 2), and the seat back 2 can be fixed at any rotational position via the lock member 35.

On the other hand, when the cam plate 34 rotates in the direction of arrow B against the biasing force of the torsion spring 36, the locking member 35 is pulled by the cam plate 34 and moves radially inward. As a result, the external teeth 35a are separated from the internal teeth 32a, and the upper bracket 25 can be rotated relative to the lower bracket 15 (reclining lock released). The shaft portion 33 passes through the upper bracket 25, and a reclining lock release cable C34 is connected to the right end portion thereof. Cable C34 is pulled in the direction of arrow C (FIG. 9) as described later by operating the operating levers 101, 102 (FIG. 1), thereby rotating the cam plate 34 in the direction of arrow B. When the operation levers 101 and 102 are stopped, the cam plate 34 rotates in the direction A due to the biasing force of the torsion spring 36, and the cable C34 returns to its original position.

Next, the configuration of the locking portion R2 of the tumble mechanism 40 will be explained. FIG. 4A is a side view schematically showing an example of the lock portion R2. As shown in FIG. 4A, the lock portion R2 has a hook 43 that is engageable with a substantially U-shaped striker 203 (an example of the support portion 202) that projects upward from the floor 200. The hook 43 is rotatably supported by the rear base 14 about an axis CL41 extending in the left-right direction, and when the tip of the hook 43 engages the striker 203, the lock portion R2 is activated (cushion lock). ). On the other hand, as shown in FIG. 4B, when the tip of the hook 43 separates from the striker 203, the lock portion R2 is released (cushion lock released).

The configuration of the lock portion R2 will be explained in more detail. As shown in FIG. 4A, the lock portion R2 includes, in addition to the hook 43, an upper plate 44 that is rotatably supported on the rear base 14 above the hook 43 about an axis CL42 extending in the left-right direction. , a lower plate 45 rotatably supported on the rear base 14 between the upper plate 44 and the hook 43 about an axis CL43 extending in the left-right direction; It has an actuation plate 46 rotatably supported by the hook 43, and a spring 47 connected to one end of the lower plate 45 and one end of the actuation plate 46. One end of the lower plate 45 engages with the upper plate 44, and as the upper plate 44 rotates, the lower plate 45 rotates. A pin 48 is provided on the lower plate 45 to protrude leftward, and the pin 48 is inserted into a through hole provided in the actuation plate 46. A cable C51 for releasing the lock portion R2 is connected to the end of the upper plate 44.

As shown in FIG. 4B, when the cable C51 is pulled upward (in the direction of arrow D), the upper plate 44 and the lower plate 45 rotate against the biasing force of the spring 47. Further, as the lower plate 45 rotates, the actuating plate 46 rotates via the pin 48. As a result, the hook 43 rotates in the direction of arrow A, the tip of the hook 43 separates from the striker 203, and the lock portion R2 is released.

Thereafter, when the cable C51 is loosened, the upper plate 44 rotates via the lower plate 45 due to the biasing force of the spring 47, and the cable C51 is pulled downward (in the direction of arrow F2). This state is a lockable state, and when the rear base 14 is pushed downward (in the direction of arrow A) in the lockable state, the striker 203 is pushed into the tip of the hook 43. As a result, the lock portion R2 is activated again. Note that the cable C51 is a cable for releasing the lock portion R2 on the left side, and a cable C52 for releasing the lock portion R2 on the right side is provided separately (see FIG. 9).

Next, the configuration of the interlocking mechanism 50 at the connection portion between the seat cushion 1 and the seat back 2 will be explained. FIG. 5 is a perspective view (a view seen diagonally from the front left) showing the configuration of the main parts of the interlocking mechanism 50, and FIG. 6 is a view of the interlocking mechanism 50 seen from the rear (view from the arrow VI in FIG. 5). 7 is an exploded perspective view of the interlocking mechanism 50. As shown in FIGS. 5 to 7, the interlocking mechanism 50 includes a base plate 51 fixed to the left end surface of the lower bracket 15, a rotation plate 52 rotatably attached to the left end surface of the base plate 51, and It has a lever plate 53 rotatably attached to the left end surface of the plate 52 and a pressing plate 54 fixed to the left end surface of the upper bracket 25.

The base plate 51 includes a flange portion 511 that contacts the left end surface of the lower bracket 15, and a plate support that extends upward while being spaced from the left end surface of the lower bracket 15 after being bent leftward from the upper end of the flange portion 511. 512 , and a cable support portion 513 protruding leftward from the lower end of the flange portion 511 . A through hole 51a is opened in the plate support portion 512 along the axis CL1, and a right end portion of a substantially cylindrical shaft portion 55 is fitted into the through hole 51a. The shaft portion 55 is spaced apart from the shaft portion 33 (FIG. 6) of the reclining mechanism 30 and is located to the left of the shaft portion 33. The base plate 51 is fastened to the lower bracket 15 with bolts 56 inserted through through holes 51b provided in the flange portion 511. The cable support portion 513 has three cutouts 513a provided from the left end surface toward the right, and the outer part of the cable is supported by the cutouts 513a (see FIG. 8A).

The rotating plate 52 has a lower end surface formed in a substantially arc shape, and has a substantially semicircular shape that is elongated in the front-rear direction as a whole. A through hole 52a is opened in the rotation plate 52 along the axis CL1. A spring receiving portion 521 protrudes rightward from the upper end surface of the rotating plate 52 above the through hole 52a. The left end portion of the shaft portion 55 is inserted into the through hole 52a via the torsion spring 57. The rotating plate 52 is rotatably supported by the base plate 51 via the shaft portion 55 about the axis CL1. One end of the torsion spring 57 is locked to the spring receiver 521, and the other end is locked to the base plate 51. As a result, the biasing force of the torsion spring 57 in the direction of arrow A in FIG. 5 (clockwise) about the axis CL1 is constantly applied to the rotating plate 52.

A through hole 52b is opened at the front end of the rotating plate 52 along the axis CL5 extending in the left-right direction. A contact surface 524 for the pin 58 is formed on the upper end surface of the rotating plate 52 above the through hole 52b. A pair of front and rear cable connecting portions 525 are provided at the rear end of the rotating plate 52 . The cable connecting portion 525 is a long hole elongated in the vertical direction, and the distal end portion of the cable is slidably locked to the cable connecting portion 525 as described later (FIG. 8A).

The entire lever plate 53 is formed into a substantially C-shape with the axis CL5 as the center. A through hole 53a centered on the axis CL5 is opened in the center of the lever plate 53. The shaft portion 59 is inserted into the through hole 53a. The right end portion of the shaft portion 59 that has passed through the through hole 53a is fitted into the through hole 52b of the rotation plate 52. Thereby, the lever plate 53 is rotatably supported by the rotary plate 52 via the shaft portion 59 about the axis CL5. A torsion spring 60 is mounted around the shaft portion 59. One end of the torsion spring 60 is engaged with a spring receiver 532 provided at one end of the lever plate 53, and the other end is engaged with a spring receiver 526 provided on the rotation plate 52. As a result, the lever plate 53 is always biased by the torsion spring 57 in the direction of arrow B in FIG. 5 (counterclockwise) about the axis CL5.

A through hole 53b is opened in the left-right direction at the upper end of the lever plate 53. A left end portion of a substantially cylindrical pin 58 is fitted into the through hole 53b. The pin 58 extends to the right of the contact surface 524 of the rotating plate 52. When the lever plate 53 is rotated counterclockwise by the biasing force of the torsion spring 57, the outer peripheral surface of the pin 58 comes into contact with the contact surface 524. The lower end of the lever plate 53 is folded back toward the upper end to form a cable connection portion 534. The end of the cable is locked to the cable connection portion 534 as described later.

The pressing plate 54 includes a flange portion 541 fixed to the left end surface of the upper bracket 25 above the reclining mechanism 30, and a generally arcuate shape centered on the axis CL1 that protrudes leftward from the lower end of the flange portion 541. It has a circular arc portion 542 and a protrusion portion 543 that protrudes downward from the left end portion of the circular arc portion 542. As shown in FIG. 6, the arc portion 542 extends to the left beyond the plate support portion 512 of the base plate 51, and the protrusion portion 543 extends to the right of the lever plate 53 and to the left of the right end of the pin 58. located on the opposite side. As shown in FIG. 5, the protrusion 543 has a substantially triangular shape in side view, and a contact portion 544 that abuts the pin 58 is provided on the front slope of the protrusion 543.

FIG. 5 shows the configuration of the interlocking mechanism 50 in the seated state of the seat 100, and corresponds to the initial state of the interlocking mechanism 50 in which the pin 58 and the contact portion 544 are separated. When the upper bracket 25 rotates forward (in the direction of arrow C in FIG. 5) from this initial state, the contact portion 544 of the pressing plate 54 contacts the pin 58. As a result, a rotational force about the axis CL1 acts on the lever plate 53 and the rotation plate 52 via the pin 58, and the lever plate 53 and the rotation plate 52 are integrated and rotated about the axis CL1. Rotate in the direction of arrow B (counterclockwise).

On the other hand, when the lever plate 53 rotates in the direction of arrow A (clockwise) about the axis CL5 from the initial state, the pin 58 moves rearward. As a result, the pin 58 is retracted to the inside in the radial direction of the rotation locus about the axis CL1 of the pressing plate 54. Therefore, even if the upper bracket 25 rotates forward, the contact portion 544 of the pressing plate 54 does not contact the pin 58, and rotation of the rotation plate 52 in the direction of arrow B is prevented.

FIG. 8A is a side view showing an example of the operation of the interlocking mechanism 50 while the seat back 2 is in the process of changing from the upright position to the folded position. As shown in FIG. 8A, the cable support portion 513 of the base plate 51 supports an end portion of a cylindrical outer 515 that covers the cables C51 to C53. The distal end portions of the cables C51 and C52 are respectively connected to a pair of front and rear cable connecting portions 525 provided on the rotation plate 52. The tip of the cable C53 is connected to a cable connecting portion 534 provided on the lever plate 53. The cables C51 to C53 extend in the vertical direction so as not to cross each other, and are arranged spaced apart from each other in the front-back direction. The cables C51 to C53 are movable within the outer 515, and the length from the tip of the outer 515 to the tip of the cables C51 to C53 changes as the seat back frame 20 rotates.

FIG. 9 is a diagram showing the connection state of a plurality of cables arranged on the seat 100. An outer 515 as shown in FIG. 8A is provided around each cable, but illustration of the outer 515 is omitted in FIG. 9. As shown in FIG. 9, one end of the cable C31 is connected to the lower operating lever 102 provided at the front end of the seat cushion 1. The other end of the cable C31 is connected to a cushion relay section 61 arranged inside the seat cushion 1. Further, one end portions of cables C32 and C53 are connected to the cushion relay portion 61.

The other end of the cable C53 is connected to the interlocking mechanism 50 (FIG. 8A). Furthermore, one end portions of cables C51 and C52 are connected to the interlocking mechanism 50. The other end of the cable C51 is connected to the lock portion R2 on the left side of the seat 100 (see FIG. 4A). The other end of the cable C52 is connected to the lock portion R2 on the right side of the seat 100.

The other end of the cable C32 is connected to a back relay section 62 arranged inside the seat back 2. One end of the cable C33 is connected to the upper operating lever 101 provided at the upper end of the seat back 2, and the other end of the cable C33 is connected to the back relay section 62. One end of the cable C34 is further connected to the back relay section 62. The other end of the cable C34 is connected to the reclining mechanism 30 (see FIG. 3).

The cushion relay section 61 has a function of transmitting the tensile force acting on the cable C31 to the cables C32 and C53. Specifically, the cushion relay part 61 has a cushion rotation plate (not shown) that rotates around an axis extending in the vertical direction, and the ends of the cables C31, C32, and C53 are connected to the cushion rotation plate. Each is connected. When the cable C31 is pulled in the direction of arrow B, the cushion rotating plate rotates, thereby pulling the cables C32 and C53 in the direction of arrow B.

The back relay section 62 has a function of transmitting the tensile force acting on the cables S32 and C33 to the cable C34. Specifically, the back relay section 62 has a back rotation plate (not shown) that rotates around an axis extending in the front-rear direction, and the ends of the cables C32, C33, and C34 are attached to the back rotation plate. Each is connected. When cable C32 or cable C33 is pulled in the direction of arrow B or arrow A, cable C34 is pulled in the direction of arrow C via the back rotation plate.

The main operations of the seat 100 according to this embodiment will be explained. Before the user (occupant or non-occupant) operates the upper operation lever 101 at the upper end of the seat back 2, the state of the interlocking mechanism 50 is in the initial state shown in FIG. 5. In the initial state, the rotating position of the rotating plate 52 is the locking position, the cables C51 and C52 in FIG. 9 are not pulled, and the locking portion R2 of the tumble mechanism 40 is operating.

From this state, when the user operates the upper operating lever 101 upward (in the direction of arrow A in FIG. 9) while the occupant is not seated on the seat 100, the The cable C34 is pulled upward (in the direction of arrow C). As a result, the lock portion R1 (FIG. 2) of the reclining mechanism 30 is released, and the seat back 2 is rotated forward by the urging force of the spring S1 (FIG. 2).

When the amount of forward rotation of the seat back 2 exceeds a predetermined amount, the contact portion 544 of the pressing plate 54 comes into contact with the pin 58 at the end of the lever plate 53, as shown in FIG. 8A. As a result, a counterclockwise rotational force acts on the rotation plate 52. As a result, the rotating plate 52 rotates about the axis CL1 in the direction of arrow B in FIG. 8A.

As the seat back 2 rotates forward, the amount of counterclockwise rotation of the rotation plate 52 increases. As shown in FIG. 8B, when the rotating plate 52 rotates counterclockwise to the maximum, the rotating position of the rotating plate 52 is the unlocked position, the seat back 2 is in the folded position, and the seat 100 is in the folded position. It becomes a front-loaded state. At this time, the pair of cables C51 and C52 is pulled upward to the maximum (in the direction of arrow D in FIG. 9). As a result, the left and right lock portions R2 are simultaneously released. In this case, the cables C51 and C52 remain pulled to the maximum, and relocking of the lock portion R2 is prohibited. When the lock portion R2 is released, the seat cushion 1 is rotated forward via the rotation mechanism 41 by the biasing force of the spring S2 (FIG. 2), and assumes a vertical posture. This causes the sheet 100 to become tumbled.

On the other hand, when the lower operation lever 102 at the front end of the seat cushion 1 is operated forward (in the direction of arrow B in FIG. 9) when no occupant is seated on the seat 100, the cable C31 and the cushion relay section 61 , the cable C34 is pulled upward (in the direction of arrow C in FIG. 9) via the cable C32 and the back relay section 62. As a result, the lock portion R1 (FIG. 2) of the reclining mechanism 30 is released, and the seat back 2 is rotated forward by the biasing force of the spring S1.

At this time, by operating the lower operating lever 102, the cable C53 is pulled forward (in the direction of arrow B in FIG. 9) via the cable C31 and the cushion relay section 61. As a result, as shown in FIG. 8C, the lever plate 53 rotates clockwise (in the direction of arrow A) about the axis CL5, and the pin 58 at the end of the lever plate 53 rotates the pressing plate 54. Move inside the trajectory. That is, the pin 58 moves from the contact possible position (FIG. 8A) where it can contact the contact portion 544 of the pressing plate 54 to the retracted position (FIG. 8C) where contact is avoided.

Therefore, even if the seatback 2 is tilted, the contact portion 544 of the pressing plate 54 does not contact the pin 58, and the rotational position of the rotation plate 52 remains in the same position as the initial state (FIG. 5), and the locking operation is performed. held in position. Therefore, the release operation of the locking portion R2 by the interlocking mechanism 50 is canceled (invalidated), and the seat cushion 1 is maintained in a horizontal position without releasing the locking portion R2. Note that the cable C53, lever plate 53, etc. in FIG. 8C constitute a canceling mechanism 70 for making it possible to cancel the release operation of the lock portion R2.

When the user releases the lower operating lever 102 after the abutting portion 544 of the pressing plate 54 rotates forward of the pin 58 with the canceling mechanism 70 canceling the release operation of the locking portion R2, As shown in FIG. 8D, the lever plate 53 rotates counterclockwise (in the direction of arrow B) about the axis CL5 due to the biasing force of the torsion spring 60. This causes the rotation plate 52 and the lever plate 53 to return to their initial states. At this time, the seat 100 is held forward.

As described above, in this embodiment, by operating the upper operating lever 101 provided at the upper end of the seat back 2, the seat state can be shifted from the seated state to the forward-folded state and then to the tandem state. Furthermore, by operating the lower operating lever 102 provided at the front end of the seat cushion 1, the seat state can be shifted from the seated state to the forward-folded state. Therefore, by operating the

different operating levers

101 and 102, the seat state can be changed to a mutually different seat state, and a variety of seat arrangements can be easily realized.

The lock portion R1 of the reclining mechanism 30 can be released by operating the lower operating lever 102 while the occupant is seated on the seat 100, thereby allowing the seat 100 to be reclined. The lower operation lever 102 is provided at the front end of the seat cushion 1 so that the occupant seated on the seat 100 can easily operate it. However, the installation position of the operating lever 102 is not limited to this, and the operating lever 102 may be installed at other positions. FIG. 10A is a side view of a main part of a sheet 100 showing an example thereof.

In FIG. 10A, the operating lever 102 is provided on the left side of the side frame 11 on the left side of the seat cushion frame 10. More specifically, the operating lever 102 is supported by the side frame 11 so as to be slidable in the front-rear direction along an engagement portion 110 (groove or hole) extending in the front-rear direction on the side frame 11 . One end portions of cables C32 and C53 are connected to the rear end portion of the operating lever 102. The other end of the cable C32 is connected to the back relay section 62 (FIG. 9) of the seat back 2, and the other end of the cable C53 is connected to the interlocking mechanism 50 (FIG. 9). Therefore, the cable C31 and cushion relay section 61 shown in FIG. 9 are unnecessary. When the operating lever 102 is slid forward (in the direction of arrow A) when no occupant is seated on the seat 100, the cables C32 and C53 are pulled, and the seat state is changed to the forward position as described above. can.

FIG. 10B is a side view of a main part of the seat 100 showing another example of the attachment part of the operating lever 102. In FIG. 10B, the operating lever 102 is rotatably supported in the vertical direction by the side frame 11 via a shaft portion 63 extending in the left-right direction. One end portions of cables C32 and C53 are connected to the operating lever 102 below the shaft portion 63. When the operating lever 102 is rotated upward (in the direction of arrow A) when no occupant is seated on the seat 100, the cables C32 and C53 are pulled, and the seat state can be changed to the forward position as described above. .

Note that the shaft portion 33 (FIG. 3) of the reclining mechanism 30 can also be configured as a rotation shaft of the operating lever 102 in FIG. 10B. In this case, the cable for transmitting the operation of the operating lever 102 to the locking portion R1 of the reclining mechanism 30, that is, the cables C31 and C32 from the operating lever 102 to the reclining mechanism 30, becomes unnecessary.

According to this embodiment, the following effects can be achieved.
(1) The seat state changing device includes a seat cushion 1 that is provided so as to be able to change its posture between a horizontal posture extending in a substantially horizontal direction and a vertical posture extending in a substantially vertical direction, and a seat cushion centered on an axis CL1. A seat back 2 is provided so as to be rotatable to the seat cushion 1, and is also provided so as to be changeable between an upright position in which the seat cushion 1 is in a horizontal position and a folded position in which it is tilted toward the seat cushion 1 in a horizontal position. (FIG. 1A). The predetermined seat states include a sitting state in which the seat cushion 1 is in a horizontal position and the seat back 2 is in an upright position, and a forward position in which the seat cushion 1 is in a horizontal position and the seat back 2 is in a folded position. This includes a tumble state in which the seat cushion 1 is in a vertical position and the seat back 2 is in a folded position (FIG. 2). The seat state changing device includes a spring S1 that biases the seat back 2 so that the seat back 2 is in a folded position, and a locking portion R1 that fixes the seat back 2 in an upright position against the biasing force of the spring S1. A spring S2 biases the seat cushion 1 so that the seat cushion 1 assumes a vertical posture, and a locking portion R2 resists the biasing force of the spring S2 to fix the seat cushion 1 in a horizontal posture. The upper operating lever 101 and the lower operating lever 102 that are input, the reclining mechanism 30 that releases the locking portion R1 in response to the operating force of the upper operating lever 101 or the operating force of the lower operating lever 102, and the seat by releasing the locking portion R1. The interlocking mechanism 50 releases the locking portion R2 when the seat back 2 is tilted, and in response to the operation force of the lower operating lever 102, the interlocking mechanism 50 disables the locking portion R2 from being released when the seatback 2 is tilted. (FIG. 2, FIG. 8C, FIG. 9).

According to this configuration, by operating the upper operation lever 101, it is possible to release both the lock part R1 that fixes the seat back 2 in the upright position and the lock part R2 that fixes the seat cushion 1 in the horizontal position, and the lower operation lever 101 can be operated. By operating the lever 102, only the lock portion R1 can be released. Therefore, depending on the operation of the operating levers 101 and 102, the seat state is changed from a seated state to a tandem state or from a seated state to a forward-folded state, thereby realizing a variety of seat arrangements. Further, since there is no need to adjust the operation timing of the operating levers 101 and 102 when switching the seat state, switching to an incorrect seat state can be suppressed.

(2) The seat cushion 1 has a seat cushion frame 10, and the seat back 2 is rotatably supported by the seat cushion frame 10 about an axis CL1, and is provided with an abutment portion 544. It has a seat back frame 20 (FIGS. 1A and 5). The interlocking mechanism 50 includes a lever plate 53 provided with a pin 58 that the contact portion 544 contacts when the seat back 2 is tilted, and a rotating plate 52 that supports the lever plate 53. When the lever plate 53 comes into contact with the pin 58 and the lever plate 53 is pushed, the lock portion R2 is configured to be released (FIGS. 8B and 9). The canceling mechanism 70 receives the operating force of the lower operating lever 102 and moves the pin 58 to a retracted position where the contact portion 544 and the pin 58 are prevented from contacting each other (FIG. 8C). Thereby, by moving the lever plate 53 that constitutes the interlocking mechanism 50 to the retracted position, the release of the lock portion R2 can be disabled. Therefore, the configuration of the cancel mechanism 70 can be simplified, and an increase in the number of parts due to the addition of the cancel mechanism 70 can be minimized.

(3) The interlocking mechanism 50 includes a rotation plate 52 that is rotatable about the axis CL1 from a lock operation position where the lock portion R2 is activated to an unlock position where the lock portion R2 is released; A lever plate 53 is rotatably supported by the rotation plate 52 about an axis CL5 substantially parallel to the axis CL1 so as to rotate together with the rotation plate 52, and has a pin 58. (Figure 5). The lever plate 53 is provided so that the pin 58 moves from an abutting position where it can abut the abutting portion 544 to a retracted position in response to the operating force of the operating lever 102 (FIGS. 8A and 8C). Thereby, the interlocking mechanism 50 and the canceling mechanism can be configured compactly and can be easily incorporated into the seat 100.

(4) The direction in which the rotation plate 52 is rotated from the lock operation position to the lock release position is counterclockwise, and the direction in which the lever plate 53 is rotated when the pin 58 moves from the contactable position to the retracted position is The direction is clockwise (FIG. 8B, FIG. 8C). Thereby, the pin 58 can be moved radially inward of the contact portion 544 about the axis CL1, and the pin 58 can be easily retracted from the contact portion 544.

(5) The reclining mechanism 30 has a cable C34 that transmits the operating force of the lower operating lever 102 to the lock portion R1 (FIGS. 3 and 9). The cancel mechanism 70 has a cable C53 that transmits the operating force of the lower operating lever 102 to the lever plate 53 (FIGS. 8C and 9). Thereby, it is possible to easily release the lock portion R1 and disable the release of the lock portion R2 by operating the lower operating lever 102 by adjusting the settings of the cables C34 and C53.

(6) The upper operating lever 101 is provided at the upper end of the seat back 2 (FIG. 1A). Thereby, an occupant who is going to get on the rear seat of the seat 100 and an occupant who has got on the seat can easily operate the seat 100. When the upper operating lever 101 is operated, the seat state changes to a tandem state, making it easy for the passenger in the rear seat to get on and off the vehicle.

(7) The lower operation lever 102 is provided at the front end of the seat cushion 1 on the opposite side of the axis CL1 (FIG. 1A). This can prevent the occupant in the rear seat of the seat 100 from accidentally operating the lower operating lever 102.

(8) The lower operation lever 102 can also be provided on the side surface of the seat cushion 1 (FIGS. 10A and 10B). Thereby, the number of cables that transmit the operating force of the lower operating lever 102 can be reduced.

(9) The lower operation lever 102 can also be provided so as to be rotatable about the axis CL1. This makes it possible to release the lock portion R1 by operating the lower operation lever 102 without using a cable.

The above embodiment can be modified into various forms. Modifications will be described below. In the above embodiment, the seat 100 is configured so that the seat state can be changed to the seated state (first state), the forward-folded state (second state), and the tumble state (third state). It may also be possible to change to another state (for example, a fully flat state). In the above embodiment (FIG. 2), the seat back 2 is brought into the folded position by the urging force of the spring S1, but the configuration of the first urging section is not limited to that described above. Instead of a spring, a cylinder member filled with gas or the like may be used. In the above embodiment (FIG. 3), the seatback 2 is fixed in the upright position by the locking portion R1 of the reclining mechanism 30 against the biasing force of the spring S1, but the configuration of the first locking portion is the same as that described above. Not limited to things.

In the above embodiment (FIG. 2), the seat cushion 1 is placed in a vertical position by the urging force of the spring S2, but the configuration of the second urging section is not limited to that described above. Instead of a spring, a cylinder member filled with gas or the like may be used. In the above embodiment (FIG. 4A), the lock portion R2 fixes the seat cushion 1 in a horizontal position against the biasing force of the spring S2, but the configuration of the second lock portion is not limited to the above-mentioned configuration. . In the above embodiment (FIG. 1A), the upper operating lever 101 as the first operating member is provided at the upper end of the seat back 2, but the first operating member may be provided at another position. Further, the first operating member may be other than a lever member (for example, a string). In the above embodiment (FIG. 1A), the lower operation lever 102 as the second operation member is provided at the front end of the seat cushion 1, but it may also be provided on the side surface of the seat cushion 1 as shown in FIGS. 10A and 10B. , may be provided so as to be rotatable about the axis CL1. Further, the second operating member may be other than a lever member (for example, a string).

In the above embodiment (FIG. 3), the reclining mechanism 30 releases the lock portion R1 in response to the operating force of the upper operating lever 101 or the lower operating lever 102, but the first lock releasing mechanism is the same as described above. Not exclusively. In the above embodiment (FIG. 8B), the interlocking mechanism 50 releases the lock part R2 when the seat back 2 is tilted by releasing the lock part R1, but the configuration of the second lock release mechanism is the same as described above. Not limited to. In the above embodiment (FIG. 8C), the canceling mechanism 70 invalidates the release of the lock portion R2 by the interlocking mechanism 50 in response to the operating force of the lower operating lever 102, but the configuration of the canceling mechanism is as described above. Not limited to. In the above embodiment (FIG. 5), the pressing plate 54 having the contact portion 544 is fixed to the seat back frame 20, but the configuration of the contact portion provided on the seat back frame is not limited to that described above.

In the embodiment described above, the interlocking mechanism 50 rotates about the axis CL1 (first axis) from the locking position (FIG. 5) where the locking portion R2 is activated to the unlocking position (FIG. 8B) where the locking portion R2 is released. A rotating plate 52 (first rotating member) is provided to be rotatable around an axis CL5 (second axis) so as to rotate together with the rotating plate 52. A lever plate 53 (second rotating member) is movably supported and has a pin 58 as a contact portion. That is, the interlocking mechanism 50 includes a rotatable movable portion (a rotary plate 52, a lever plate 53), the movable part is not limited to being rotatable but may be movable, and the configuration of the movable part is not limited to that described above. Instead of configuring the movable part with a plurality of members (the rotating plate 52, the lever plate 53), the movable part may be composed of a single member.

In the above embodiment, in response to the operating force of the lower operating lever 102, the lever plate 53 is moved from the abuttable position (FIG. 8A) where it can abut the abutting portion 544 to the retracted position (FIG. 8C) where it avoids abutting. Although the pin 58 is moved by rotation, the configuration of the canceling mechanism is not limited to that described above. The abutted portion may be moved from the abuttable position to the retracted position by movement other than rotation. In the above embodiment, when the rotating plate 52 rotates counterclockwise (first direction), the lever plate 53 rotates clockwise (second direction) by operating the lower operation lever 102. The rotating directions of the first rotating member and the second rotating member are not limited to those described above. In the above embodiment (FIG. 9), the operating force of the lower operation lever 102 is transmitted to the locking part R1 (reclining mechanism 30) via the cables C31, C32, C34 (first power transmission part), and the cables C31, C53 Although the operating force of the lower operating lever 102 is transmitted to the lever plate 53 via the second power transmitting section (second power transmitting section), the configurations of the first power transmitting section and the second power transmitting section are not limited to those described above. .

In the above embodiment, the seat 100 is applied to the vehicle 210 (FIG. 1B). Therefore, the present invention can also be configured as a vehicle having the seat 100. Further, the seat 100 can also be applied to vehicles other than vehicles, such as aircraft and ships. Therefore, the seat 100 can be used as a vehicle seat.

An armrest is provided in the center of the rear seat (for example, second row seat) of the vehicle 210 according to the present embodiment. The configuration of the armrest will be described below. FIG. 11 is a perspective view showing a schematic configuration of the second row seat of the vehicle 210. FIG. 11 also shows the main part configuration of the seat back frame 20 (20L, 20M, 20R) (dotted line). As shown in FIG. 11, the second row of seats includes the aforementioned left seat 100 (indicated by reference numeral 100L), right seat 100R, and center seat 100M.

The left seat 100L is provided with a seat back frame 20L, the right seat 100R is provided with a seat back frame 20R, and the center seat 100M is provided with a seat back frame 20M. The seat back frame 20L is separated from the seat back frame 20M, and the seat back frame 20R is coupled to the seat back frame 20M. Therefore, the seat state of the left seat 100L can be changed independently, whereas the seat state of the right seat 100R is changed integrally with the center seat 100M.

The armrest 300 is arranged facing the center seat 100M. The armrest 300 has a substantially rectangular shape as a whole, and is configured as a large armrest that extends over the entire length or almost the entire length of the center seat 100M in the left-right direction. The rear end of the armrest 300 has a rotation axis attached to the seat back frame 20R of the center seat 100M, more specifically to brackets 311 and 312 (FIG. 12) provided at both left and right ends of the lower connecting frame 20M1. It is rotatably supported through. Alternatively, the armrest 300 may be rotatably supported by the side frame 20M2 at the left end and the side frame 20M3 at the right end of the seat back frame 20M. The right side frame 20M2 is located at the boundary between the right seat 100R and the center seat 100M, and also functions as the seat back frame 20R of the right seat 100R.

FIG. 11 shows the use position of the armrest 300 in which the armrest 300 is rotated downward to the maximum extent. Although not shown, a recess is provided on the upper surface 300a of the armrest 300 in the use position. The recessed portion is used as a drink holder, storage space, etc. A recess (not shown) for storing the armrest 300 is provided on the front surface of the seat back 2 of the center seat 100M. When the armrest 300 rotates upward to the maximum, the armrest 300 is stored in the recessed portion of the seat back 2. At this time, the armrest 300 is located at the retracted position, and in this state, the occupant can sit on the center seat 100M.

FIG. 12 is a plan view (view from above) of the armrest 300 in the use position. FIG. 12 mainly shows the configuration of the support portion of the armrest frame 301 that forms the skeleton of the armrest 300 and the surrounding portion thereof. As shown in FIG. 12, a pair of left and

right support parts

302 and 303 are provided at the rear end of the armrest frame 301 to protrude rearward. The

support parts

302 and 303 are provided with a rotation shaft 305 that penetrates the

support parts

302 and 303 and extends in the left-right direction so as to be rotatable together with the

support parts

302 and 303. A pair of left and

right brackets

311 and 312 are provided on both left and right ends of the connection frame 20M1 (FIG. 11) to protrude upward and forward. Both left and right ends of the rotation shaft 305 are rotatably supported by the

brackets

311 and 312, respectively. This allows the armrest frame 301 to rotate in the vertical direction about the rotation axis 305.

In this way, the armrest 300 is supported in a double-sided structure via the pair of left and

right brackets

311 and 312, so the support rigidity is increased and the large armrest 300 can be stably supported. On the other hand, if the armrest 300 is supported in a cantilever structure via one of the left and right brackets (for example, the bracket 311), it is necessary to increase the size of the bracket 311 in order to increase the support rigidity of the armrest 300.

An angle adjustment mechanism 320 is provided between the left bracket 311 and the support portion 302, which allows the vertical rotation angle of the armrest 300 to be adjusted steplessly. Although not shown, the angle adjustment mechanism 320 includes a coil spring that is wound around the rotating shaft 305 and exerts a biasing force that prevents the rotating shaft 305 from rotating. More specifically, one end of the coil spring is connected to the support part 302, and the other end is connected to the unlocking part. The lock release section is configured to loosen the tension of the coil spring around the rotation shaft 305 when the user operates an operation section provided on the side surface of the armrest, for example. This allows rotation of the rotation shaft 305, and the armrest 300 can be rotated to any angle with respect to the horizontal line. Note that the configuration of the angle adjustment mechanism 320 is not limited to this, and any configuration may be used as long as the angle of the armrest 300 can be adjusted steplessly.

FIG. 13 is a side view of the right bracket 312 viewed from the right (view from arrow XIII in FIG. 12). As shown in FIG. 13, the bracket 312 has a substantially circular through hole 312a into which the end of the rotation shaft 305 is inserted, and a substantially circular arc shape extending from the front of the through hole 312a to the top, centering on the through hole 312a. A slot hole 312b is provided. As shown in FIGS. 12 and 13, a sliding member 310 that is slidable along the right side of the bracket 312 is arranged on the right side of the bracket 312. A long bolt 306 is inserted into the slot hole 312b from the right side. The bolt 306 passes through the sliding member 310 and is screwed into the right support portion 303 of the armrest frame 301. As a result, the bolt 306 moves along the slot hole 312b when the armrest 300 rotates.

As shown in FIG. 13, when the bolt 306 is located at the lower end of the slot hole 312b, the armrest 300 is in the use position. On the other hand, when the bolt 306 is located at the upper end of the slot hole 312b, the armrest 300 is in the retracted position. Thereby, rotation of the armrest 300 can be restricted between the use position and the storage position. When the armrest 300 rotates, the sliding member 310 slides along the right side of the bracket 312. Therefore, sliding resistance by the sliding member 310 acts on the armrest 300, thereby stabilizing the posture of the armrest 300. In this case, the sliding resistance can be adjusted by adjusting the screwing amount of the bolt 306. Note that the sliding member 310 may be provided not only on the right side of the bracket 312 but also on the left side. That is, the sliding member 310 may be provided so as to sandwich the bracket 312 therebetween.

The above description is merely an example, and the present invention is not limited to the embodiments and modifications described above unless the characteristics of the present invention are impaired. It is also possible to arbitrarily combine the above embodiment and one or more of the modifications, and it is also possible to combine the modifications.

1 seat cushion, 2 seat back, 30 reclining mechanism, 40 tumble mechanism, 50 interlocking mechanism, 52 rotating plate, 53 lever plate, 54 pressing plate, 58 pin, 70 canceling mechanism, 100 seat, 101 upper operating lever, 102 Lower operation lever, 210 vehicle, 544 contact part, R1, R2 lock part, S1, S2 spring, C31, C32, C34, C53 cable, CL1, CL5 axis line

Claims

a seat cushion provided so as to be changeable in posture between a horizontal posture extending in a substantially horizontal direction and a vertical posture extending in a substantially vertical direction; A seat is provided in a predetermined seat state, and has a seat back that is provided so as to be able to change its posture between an upright posture in which the seat cushion is in a horizontal posture and a folded posture in which it is tilted toward the seat cushion in a horizontal posture. A sheet state changing device that changes the seat state to
The predetermined seat states include a first state in which the seat cushion is in the horizontal position and the seat back is in the upright position, and a first state in which the seat cushion is in the horizontal position and the seat back is in the folded position. and a third state in which the seat cushion is in the vertical position and the seat back is in the folded position,
a first biasing portion that biases the seatback so that the seatback assumes the folded position;
a first locking portion that fixes the seat back in the upright position against the urging force of the first urging portion;
a second biasing portion that biases the seat cushion so that the seat cushion assumes the vertical posture;
a second lock part that fixes the seat cushion in the horizontal position against the urging force of the second urging part;
a first operating member and a second operating member through which a user inputs operating force, respectively;
a first lock release mechanism that releases the first locking portion in response to the operating force of the first operating member or the operating force of the second operating member;
a second lock release mechanism that releases the second lock part when the seat back is tilted due to release of the first lock part;
A seat characterized by comprising: a canceling mechanism that receives the operating force of the second operating member to invalidate the release of the second lock portion by the second lock release mechanism that occurs when the seat back is tilted. State change device.
The seat state changing device according to claim 1,
The seat cushion has a seat cushion frame,
The seat back has a seat back frame that is rotatably supported by the seat cushion frame about the axis and is provided with an abutment portion,
The second lock release mechanism includes a movable part that is provided with an abutted part that the abutting part comes into contact with when the seat back is tilted, and the abutting part abuts the abutted part. When the movable part is moved, the second lock part is configured to be released,
The canceling mechanism is characterized in that, in response to the operating force of the second operating member, the abutted section is moved to a retracted position where the abutting section and the abutted section are prevented from coming into contact with each other. Seat condition changing device.
The seat state changing device according to claim 2,
the axis is a first axis;
The movable part is
a first rotating member that is rotatable about the first axis from a lock operating position where the second locking portion is activated to an unlocking position where the second locking portion is released;
The first rotating member is rotatably supported by the first rotating member about a second axis substantially parallel to the first axis so as to rotate together with the first rotating member, and the abutted member is rotatably supported by the first rotating member. a second rotating member having a section;
The second rotating member is provided so that the abutted portion moves from an abuttable position where the abutting portion can abut to the retracted position in response to an operating force of the second operating member. A seat condition changing device characterized in that:
The seat state changing device according to claim 3,
When one and the other of clockwise and counterclockwise directions are respectively referred to as a first direction and a second direction, the direction in which the first rotating member is rotated from the lock operating position to the unlocking position is the first direction. and
The seat state changing device, wherein the second rotating member rotates in the second direction when the abutted portion moves from the abuttable position to the retracted position.
The seat state changing device according to claim 3 or 4,
The first lock release mechanism includes a first power transmission section that transmits the operating force of the second operating member to the first locking section,
The seat state changing device, wherein the canceling mechanism includes a second power transmission section that transmits the operating force of the second operating member to the second rotating member.
In the sheet condition changing device according to any one of claims 1 to 5,
The seat state changing device, wherein the first operating member is provided at an upper end of the seat back.
In the sheet condition changing device according to any one of claims 1 to 6,
the axis is located at one end of the seat cushion,
The seat state changing device, wherein the second operating member is provided at the other end of the seat cushion.
In the sheet condition changing device according to any one of claims 1 to 6,
The seat state changing device, wherein the second operating member is provided on a side surface of the seat cushion.
In the sheet condition changing device according to any one of claims 1 to 6,
The seat state changing device, wherein the second operating member is rotatably provided about the axis.
A vehicle seat comprising the seat state changing device according to any one of claims 1 to 9.
A vehicle comprising the vehicle seat according to claim 10.