Seat rotation device

Abstract

To provide a seat rotation device which can enhance a degree of freedom in arrangement.SOLUTION: A seat rotation device 10 includes: a base plate 100; a rotary plate 200; a connection unit 300; and a lock unit 500. The rotary plate has a striker 250. The lock unit 500 has a lock device 510, a release actuator 520 which is constituted of a member separated from that of the lock device, a transmission device 530, and a detection device. The lock device 510 includes a hook 511 movable between a lock position and an unlock position. The release actuator 520 includes an actuator lever 521 movable between an initial position and a release position. The transmission section 530 moves the hook from the lock position to the unlock position and turns on the detection device when the actuator lever is moved from the initial position to the release position.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a seat rotation device. [Background technology]

[0002] Conventionally, rotating seats are known in which the seat body can be rotated between a seating position and a boarding / exiting position. For example, Japanese Patent Application Laid-Open Publication No. 2020-147186 (hereinafter referred to as "Patent Document 1") discloses a rotating seat including a non-rotatable fixed member, a seat body, a rotating member supporting the seat body, and a four-bar link mechanism installed between the fixed member and the rotating member. The four-bar link mechanism has two links. One end of each link is rotatably connected to the fixed member, and the other end of each link is rotatably connected to the rotating member. Operation of the four-bar link mechanism causes the seat body and the rotating member to rotate while moving the center of rotation relative to the fixed member.

[0003] In a swivel seat such as that described in Patent Document 1, it is sometimes necessary to lock the rotating member when the seat body is in the seating position. Therefore, for example, it is conceivable to apply the vehicle seat locking device described in Japanese Patent No. 6610177 (hereinafter referred to as "Patent Document 2") to the rotating member and fixed member of the swivel seat described in Patent Document 1. This locking device includes a locking device main body and an electric actuator. The locking device main body includes a first housing, a fork, and a pole, and the electric actuator includes a second housing and a motor. The second housing is fixed to the first housing in an orientation perpendicular to the first housing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-147186 [Patent Document 2] Patent No. 6610177 Summary of the Invention [Problem to be solved by the invention]

[0005] In the locking device described in Patent Document 2, the second housing is perpendicular to the first housing, and the locking device main body and the electric actuator are integrally configured, so there is little freedom in arrangement.

[0006] An object of the present invention is to provide a seat rotation device that can be arranged with greater freedom. [Means for solving the problem]

[0007] A seat rotation device according to one aspect of the present invention is capable of rotating a seat body between a seating position where the seat body faces the front of the vehicle and a boarding / exiting position where the seat body faces an opening of a door of the vehicle, and includes: a base plate fixed to a floor of the vehicle; a rotating plate fixed to an underside of the seat body so as not to rotate relative to the seat body; a connecting unit connecting the base plate and the rotating plate so that the rotating plate can rotate with respect to the base plate between the seating position and the boarding / exiting position; and a locking unit locking the rotating plate at the seating position, wherein the rotating plate has a striker held by the locking unit, and the locking unit is configured to lock the striker; is formed as a separate member and has a release actuator for unlocking the striker locked by the locking device, a transmission unit that transmits the output of the release actuator to the locking device, and a detection unit that can detect the locked state of the striker by the locking device, wherein the locking device includes a hook that is movable between a locked position that holds the striker when the base plate is in the seated position and an unlocked position that allows the striker to be released, and the release actuator includes an actuator lever that is movable between an initial position and a release position, and when the actuator lever moves from the initial position to the release position, the transmission unit moves the hook from the locked position to the unlocked position and turns on the detection unit. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a seat rotation device that allows for increased freedom in placement. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view of the swivel seat in a seated position. [Figure 2] FIG. 2 is a perspective view of the swivel seat in the entry / exit position. [Figure 3] 1 is a perspective view of a seat rotation device according to a first embodiment of the present invention in a seated position. [Figure 4] FIG. 2 is a perspective view of the seat rotation device in the entry / exit position. [Figure 5] FIG. [Figure 6] 10A and 10B are diagrams showing the positional relationship between a base plate, a rotating plate, and a connecting unit in a seating position and a getting-in / out position. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 10 is a diagram schematically illustrating the lock unit when the actuator lever is located at an initial position. [Figure 10] FIG. 10 is a diagram illustrating the lock unit when the actuator lever is in an adjustment position. [Figure 11] FIG. 10 is a diagram illustrating the lock unit when the actuator lever is in a release position. [Figure 12] FIG. 10 is a diagram schematically illustrating the lock unit when the actuator lever is located at a full stroke position. [Figure 13] 10 is a diagram illustrating the lock unit when the actuator lever returns from the release position to the initial position. FIG. [Figure 14] FIG. 10 is a perspective view of a lock unit of a seat rotation device according to a second embodiment of the present invention. [Figure 15] FIG. 15 is an exploded perspective view of the lock unit shown in FIG. 14. [Figure 16] FIG. 10 is a diagram schematically illustrating the lock unit when the actuator lever is located at an initial position. [Figure 17] 10 is a diagram illustrating the lock unit when the actuator lever is in a release position or a full stroke position. FIG. [Figure 18]10 is a diagram illustrating the lock unit when the actuator lever returns to the initial position from the release position or the full stroke position. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the accompanying drawings, in which the same or corresponding components are designated by the same reference numerals.

[0011] (First embodiment) Fig. 1 is a perspective view of a swivel seat in a seating position. Fig. 2 is a perspective view of the swivel seat in a boarding / exiting position. The swivel seat 1 functions as a vehicle seat, particularly as a car seat.

[0012] As shown in FIGS. 1 and 2, a swivel seat 1 of this embodiment includes a seat body 2 and a seat rotation device 10.

[0013] The seat body 2 has a seat cushion 2a and a seat back 2b. The seat cushion 2a forms a seat portion. The seat back 2b supports the back of an occupant seated on the seat cushion 2a. The seat body 2 is disposed on a floor FL of the vehicle.

[0014] A pair of seat sliders 3 are attached to the floor FL to slide the seat body 2 relative to the floor FL in the front-to-rear direction of the vehicle. The pair of seat sliders 3 are spaced apart in the width direction of the vehicle. Each seat slider 3 has a lower rail 3a and an upper rail 3b.

[0015] The lower rails 3a are fixed to the floor FL in a position parallel to the front-rear direction of the vehicle. The upper rails 3b are displaceable relative to the lower rails 3a in the front-rear direction of the vehicle (longitudinal direction of the lower rails 3a).

[0016] The seat rotation device 10 is capable of rotating the seat body 2 between a seating position (position shown in FIG. 1) and an entry / exit position (position shown in FIG. 2). The seating position is a position where the seat body 2 faces the front of the vehicle. The entry / exit position is a position where the seat body 2 faces the opening of the vehicle door. The seat rotation device 10 is fixed to the underside of the seat body 2.

[0017] Fig. 3 is a perspective view of the seat rotation device in the first embodiment of the present invention in the seating position, Fig. 4 is a perspective view of the seat rotation device in the getting-in / out position, and Fig. 5 is an exploded perspective view of the seat rotation device.

[0018] As shown in FIGS. 3 to 5, the seat rotation device 10 includes a base plate 100, a rotation plate 200, a connecting unit 300, a drive unit 400, and a lock unit 500. As shown in FIG.

[0019] The base plate 100 is fixed to the floor FL of the vehicle directly or indirectly via another member. In this embodiment, the base plate 100 is fixed to the upper rail 3b. That is, the base plate 100 is fixed to the floor FL via the seat slider 3.

[0020] The rotating plate 200 is fixed to the underside of the seat body 2 so as not to rotate relative to the seat body 2. As shown in FIGS. 3 to 5, the rotating plate 200 has a pair of side brackets 210, a rear pipe 220, a front pipe 230, a connecting plate 240, and a striker 250.

[0021] The pair of side brackets 210 are arranged with a gap in the width direction. Each side bracket 210 is arranged above the seat slider 3. Each side bracket 210 has a shape that extends in the front-to-rear direction. Of the pair of side brackets 210, the side bracket 210 arranged on the left side in the width direction has a seat belt anchor (not shown) fixed to the rear portion thereof by a fixing bolt B.

[0022] The rear pipe 220 connects the rear portions of the pair of side brackets 210 together.

[0023] The front pipe 230 connects the front portions of the pair of side brackets 210 together.

[0024] The connecting plate 240 connects the rear pipe 220 and the front pipe 230 together.

[0025] 3 to 5, the striker 250 is fixed to the rear end of the connecting plate 240. The striker 250 is fixed to the connecting plate 240 in a state in which it straddles the inner end of the rear pipe 220 in the width direction.

[0026] The connecting unit 300 connects the base plate 100 and the rotating plate 200 so that the rotating plate 200 can rotate relative to the base plate 100 between the seating position and the getting-on / off position.

[0027] The connection unit 300 includes a rotation link 310 , a main slider 320 , and a sub-slider 330 .

[0028] The rotation link 310 connects the base plate 100 and the rotation plate 200. The rotation link 310 has a fixed end 311 (see FIG. 5) and a rotating end 312.

[0029] The fixed end 311 is formed at one end of the rotation link 310. The fixed end 311 is fixed to the base plate 100 so as to be rotatable relative to the base plate 100. Specifically, the fixed end 311 is fixed from the back side of the base plate 100 by a fastening member. The fixed end 311 is rotatable around a fixed shaft portion 311a, which is the central axis of the fastening member.

[0030] The rotating end 312 is formed at the other end of the rotating link 310. The rotating end 312 is rotatable relative to the base plate 100 around the fixed shaft portion 311a of the fixed end 311 as the center of rotation, and is fixed to the rotating plate 200 so as to be rotatable relative to the rotating plate 200. Specifically, the rotating end 312 is fixed to the rotating plate 200 by a fastening member F2. The rotating plate 200 is rotatable relative to the rotating end 312 around the support shaft portion 312a, which is the central axis of the fastening member F2. Hereinafter, the portion of the rotating plate 200 supported by the support shaft portion 312a will be referred to as the "first supported portion 201" (see Figures 3 to 5).

[0031] The main slider 320 includes a lower rail 321 and an upper slider 322 .

[0032] The lower rail 321 is fixed to the base plate 100. Specifically, the lower rail 321 is fixed to the center of the base plate 100. The lower rail 321 has a shape that extends linearly. The lower rail 321 has a shape that extends linearly along the diameter of an imaginary circle A1 (see FIG. 6) whose radius is twice the length of the distance between the fixed shaft portion 311a at the fixed end portion 311 and the support shaft portion 312a at the rotating end portion 312 and whose center is the fixed shaft portion 311a. Note that in FIG. 6, the imaginary circle A1 and a circle A2 whose radius is the length between the fixed shaft portion 311a and the support shaft portion 312a and whose center is the support shaft portion 312a are indicated by dashed dotted lines, and the rotating plate 200 is indicated by a dashed two-dotted line. Also, a vehicle entrance / exit is provided at the top in FIG. 6.

[0033] 6, the lower rail 321 has a shape that extends linearly in a direction that intersects with the front-rear direction of the vehicle and along the diameter of the imaginary circle A1. The lower rail 321 is inclined with respect to the front-rear direction so as to gradually approach the door opening as it moves toward the front of the vehicle.

[0034] The upper slider 322 is movable along the lower rail 321. The upper slider 322 supports the rotation plate 200 so that the rotation plate 200 is rotatable relative to the upper slider 322. Specifically, the upper slider 322 is fixed to the rotation plate 200 by a fastening member F3. The rotation plate 200 is rotatable relative to the upper slider 322 around a support shaft portion 322a, which is the central axis of the fastening member F3. Hereinafter, the portion of the rotation plate 200 supported by the support shaft portion 322a will be referred to as the "second supported portion 202" (see FIGS. 3 to 5).

[0035] The upper slider 322 moves the second supported portion 202 of the rotating plate 200 along the lower rail 321 while rotating it relative to the upper slider 322 in the same direction (clockwise in Figure 6) in which the rotating plate 200 rotates relative to the rotating end portion 312 when the rotating plate 200 moves from the seating position to the boarding / disembarking position.

[0036] When the seat body 2 moves between the seating position and the boarding / disembarking position, the support shaft portion 322a of the upper slider 322 moves along the locus of a point on the circle A2 (the diameter of the imaginary circle A1) when the circle A2 rotates while being inscribed in the imaginary circle A1.

[0037] The sub-slider 330 includes a lower rail 331 and an upper slider 332 .

[0038] The lower rail 331 is fixed to the base plate 100. Specifically, the lower rail 331 is fixed to a portion of the base plate 100 located between the seat slider 3, which is arranged on the inner side in the width direction of the base plate 100, and the lower rail 321 of the main slider 320. The lower rail 331 has a shape that extends linearly. As shown in FIG. 6 , the lower rail 331 is fixed to the base plate 100 in an orientation such that an extension line of the lower rail 331 does not pass through the fixed shaft portion 311a, which is the center of the imaginary circle A1. The lower rail 331 is inclined with respect to the front-to-rear direction so as to gradually approach the door opening as it approaches the front of the vehicle.

[0039] The upper slider 332 is movable along the lower rail 331. The upper slider 332 supports the rotation plate 200 so that the rotation plate 200 is rotatable relative to the upper slider 332. Specifically, the upper slider 332 is fixed to the rotation plate 200 by a fastening member F4 (see FIG. 5). The rotation plate 200 is rotatable relative to the upper slider 332 around a support shaft portion 332a, which is the central axis of the fastening member F4. Hereinafter, the portion of the rotation plate 200 supported by the support shaft portion 332a will be referred to as the "third supported portion."

[0040] The upper slider 322 moves the third supported portion of the rotating plate 200 along the lower rail 331 while rotating it relative to the upper slider 332 in the same direction (clockwise in Figure 6) in which the rotating plate 200 rotates relative to the rotating end portion 312 when the rotating plate 200 moves from the seating position to the boarding / disembarking position.

[0041] The drive unit 400 drives the connection unit 300. The drive unit 400 is fixed to the base plate 100. The drive unit 400 can rotate the rotation link 310 around the fixed end 311. The drive unit 400 includes a motor 410 and a gear 420 that transmits the output of the motor 410 to the rotation link 310.

[0042] For example, when the motor 410 is driven while the rotating plate 200 is in the seating position, the rotating link 310 rotates about the fixed end 311, and the upper sliders 322, 332 move forward along the lower rails 321, 331. As a result, the rotating plate 200 rotates toward the boarding / alighting opening while moving forward relative to the base plate 100. As a result, the rotating plate 200 is positioned at the boarding / alighting position.

[0043] The lock unit 500 locks the rotating plate 200 in the seated position. The lock unit 500 is fixed to the base plate 100. The lock unit 500 has a locking device 510, a release actuator 520, a transmission unit 530, a detection device 540, a first bracket 551, and a second bracket 552.

[0044] The locking device 510 is capable of locking the striker 250. The locking device 510 includes a hook 511, a housing 512, and a pole 513.

[0045] The hook 511 is movable between a locked position (position shown in FIG. 9) and an unlocked position (position shown in FIG. 11). The locked position is a position where the striker 250 is held when the rotating plate 200 is in the seated position. The unlocked position is a position where the striker 250 is allowed to be released. The hook 511 is biased in a direction toward the unlocked position (the direction indicated by the arrow AR1 in FIG. 9) by a first torsion spring (not shown). The first torsion spring is held by a housing 512.

[0046] Housing 512 accommodates hook 511. Housing 512 is formed with a slit 512a that allows striker 250 to enter and exit.

[0047] The pole 513 is accommodated in the housing 512. The pole 513 has a shape that allows it to engage with the hook 511 in the locked position. The pole 513 has a first end 513a and a second end 513b. The second end 513b is rotatable around the first end 513a. A second torsion spring (not shown) is attached to the first end 513a. The pole 513 is biased by the second torsion spring in a direction in which it engages with the hook 511 in the locked position (the direction indicated by the arrow AR2 in FIG. 9). The pole 513 is rotatable around the first end 513a between an engaged position (the position shown in FIG. 9) in which it engages with the hook 511 in the locked position, and a spaced position (the position shown in FIG. 11) in which it is spaced apart from the hook 511 in the locked position.

[0048] 7 and 8, the locking device 510 is fixed to the first bracket 551 by a bolt B5. As shown in Fig. 5, the first bracket 551 is fixed to the base plate 100 by a fastening member F5.

[0049] The release actuator 520 is configured as a separate member from the locking device 510. The release actuator 520 is a device for releasing the lock of the striker 250 by the locking device 510. The release actuator 520 has an actuator lever 521 and a housing 522.

[0050] The actuator lever 521 is fixed to the outer surface of the housing 522. The actuator lever 521 is movable between an initial position (the position shown in FIG. 9) and a release position (the position shown in FIG. 11). The release position is a position where the hook 511 of the locking device 510 is moved to the unlock position.

[0051] The housing 522 holds the actuator lever 521. The housing 522 accommodates a drive source (such as a motor) that drives the actuator lever 521 from the initial position toward the release position. As shown in FIG. 8, the housing 522 is fixed to the second bracket 552 by a fastening member B7. As shown in FIGS. 7 and 8, the second bracket 552 is fixed to the first bracket 551 by a fastening member F6.

[0052] The detection device 540 can detect a locked state of the striker 250 by the locking device 510. The detection device 540 is disposed at a position where it can come into contact with the transmission part 530. As shown in FIG. 8 , the detection device 540 is configured as a limit switch. When the actuator lever 521 moves from the initial position to the release position, the detection device 540 is pressed by the transmission part 530 and turned on. This allows the hook 511 to move from the locked position to the unlocked position. The on signal of the detection device 540 may be used to drive the motor 410 of the drive unit 400.

[0053] The transmission unit 530 transmits the output of the release actuator 520 to the locking device 510. When the actuator lever 521 moves from the initial position to the release position, the transmission unit 530 allows the hook 511 to move from the locked position to the unlocked position and turns on the detection device 540.

[0054] The transmission part 530 has a first link 531 , a second link 532 , a link member 533 , and a biasing member 534 .

[0055] The first link 531 is connected to the actuator lever 521. The first link 531 is formed in a substantially rod-like shape.

[0056] The second link 532 is coupled to the locking device 510. Specifically, the second link 532 is connected to the second end 513b of the pole 513. The second link 532 allows the hook 511 to move between the locked position and the unlocked position by rotating the second end 513b of the pole 513 about the first end 513a. For example, by moving the second end 513b of the pole 513 from the engaged position to the separated position, the hook 511 and the pole 513 are disengaged, and the hook 511 is allowed to rotate from the locked position to the unlocked position.

[0057] The link member 533 is connected to the first link 531 and the second link 532. The link member 533 is configured not to pull the second link 532 until the actuator lever 521 moves from the initial position to the adjustment position (the position shown in FIG. 10), but to pull the second link 532 when the actuator lever 521 moves from the adjustment position toward the release position. The adjustment position is set between the initial position and the release position. In this embodiment, the link member 533 has a first link element 533A and a second link element 533B.

[0058] The first link element 533A is attached to a shoulder bolt 552a (see FIG. 8) provided on the second bracket 552. The first link element 533A is held by the shoulder bolt 552a so as to be rotatable relative to the shoulder bolt 552a. The first link element 533A has a first connecting portion a1, a pressing portion a2, and an attachment piece a3.

[0059] The first connection part a1 is a part connected to the first link 531. The first connection part a1 is pressed by the first link 531 when the actuator lever 521 moves from the initial position to the release position. When the first connection part a1 is pressed by the first link 531, the first link element 533A rotates around the shoulder bolt 552a.

[0060] The pressing portion a2 presses the second link element 533B when the first connecting portion a1 is pressed by the first link 531. The pressing portion a2 is formed of a cut-and-raised piece.

[0061] One end of the biasing member 534 is fixed to the attachment piece a3. The other end of the biasing member 534 is fixed to an attachment piece 552b provided on the second bracket 552.

[0062] The second link element 533B is rotatable relative to the first link element 533A. The second link element 533B is attached to a stepped bolt 552a. The second link element 533B is held by the stepped bolt 552a so as to be rotatable relative to the stepped bolt 552a. The second link element 533B has a second connecting portion b1, a pressed portion b2, and a cam portion b3.

[0063] The second connection portion b1 is a portion connected to the second link 532.

[0064] The pressed portion b2 is a portion that is pressed by the pressing portion a2. As shown in FIG. 9, when the actuator lever 521 is in the initial position, a clearance c1 is provided between the pressing portion a2 and the pressed portion b2. When the pressed portion b2 is pressed by the pressing portion a2, the second link element 533B rotates around the shoulder bolt 552a. When the second link element 533B rotates around the shoulder bolt 552a, the second connection portion b1 pulls the second link 532. As a result, the pole 513 moves from the engaged position to the separated position, allowing the hook 511 to move from the locked position to the unlocked position.

[0065] The cam portion b3 is a portion that drives the detection device 540. When the pressed portion b2 is pressed by the pressing portion a2 and the second link element 533B rotates around the shoulder bolt 552a, the cam portion b3 turns on the detection device 540.

[0066] Next, the operation of the lock unit 500 will be described with reference to FIGS.

[0067] FIG. 9 shows the state in which the striker 250 is locked, that is, the actuator lever 521 is in the initial position, a clearance c1 is formed between the pressing portion a2 and the pressed portion b2, the cam portion b3 is spaced apart from the detection device 540, and the pole 513 in the engagement position and the hook 511 in the lock position are engaged with each other.

[0068] 10, when the actuator lever 521 moves from this state to the adjustment position, the clearance c1 becomes zero, and the pressing portion a2 of the first link element 533A comes into contact with the pressed portion b2 of the second link element 533B. In other words, the transmission portion 530 does not pull the second link 532 until the actuator lever 521 moves from the initial position to the adjustment position. In this state, the cam portion b3 does not turn on the detection device 540, and the pole 513 is engaged with the hook 511 in the locked position.

[0069] As shown in FIG. 11 , when the actuator lever 521 moves from the adjustment position to the release position, the first link 531 presses the first connecting portion a1, causing the first link element 533A to rotate around the stepped bolt 552a against the biasing force of the biasing member 534. At this time, the pressing portion a2 presses the pressed portion b2, causing the second link element 533B to rotate around the stepped bolt 552a, and the second connecting portion b1 pulls the second link 532. As a result, the pole 513 rotates around the first end 513a until the second end 513b of the pole 513 moves from the engaged position to the separated position. Therefore, the engagement between the hook 511 and the pole 513 is released, allowing the hook 511 to rotate from the locked position to the unlocked position. The movement amount d1 of the actuator lever 521 and the movement amount d2 of the pole 513 can be adjusted by changing the distance from the shoulder bolt 552a to the first connection part a1 and the distance from the shoulder bolt 552a to the second connection part b1, etc.

[0070] Furthermore, when the second link element 533B rotates, the cam portion b3 turns on the detection device 540. Therefore, it is detected that the striker 250 has been unlocked by the locking device 510.

[0071] Although the hook 511 is biased by the first torsion spring in a direction toward the unlocked position (the direction indicated by the arrow AR1 in FIG. 11 ), the biasing force is not strong enough to push the striker 250 out of the slit 512a of the housing 512. Therefore, when the engagement between the pole 513 and the hook 511 is released, the hook 511 is held in the locked position. When the rotating plate 200 moves from the seating position toward the getting-on / off position, that is, when the striker 250 moves in a direction to disengage from the slit 512a, the hook 511 rotates from the locked position toward the unlocked position in accordance with the movement of the striker 250. Thereafter, the hook 511 is held in the unlocked position by the biasing force of the first torsion spring. When the hook 511 is in the unlocked position, the pole 513 is in contact with the hook 511.

[0072] 12, when the actuator lever 521 moves to the full stroke position, the pole 513 further rotates around the first end 513a, and the pole 513 moves away from the hook 511. The full stroke position is a position where the stroke from the initial position is greater than the stroke from the initial position to the release position.

[0073] 13 shows a state in which the driving force of the driving source that drives the actuator lever 521 is released. When the driving force of the driving source is released, the first link element 533A rotates around the shoulder bolt 552a due to the biasing force of the biasing member 534. Then, the first link 531 is pressed by the first connecting portion a1, and the actuator lever 521 moves to the initial position.

[0074] On the other hand, since the pole 513 is in contact with the hook 511, it cannot rotate around the first end 513a from the separated position toward the engaged position. Therefore, the second link element 533B cannot rotate around the shoulder bolt 552a either. Therefore, a clearance c2 is formed between the pressing portion a2 and the pressed portion b2.

[0075] In this state, when the rotating plate 200 moves from the boarding / disembarking position toward the seating position and the striker 250 enters the slit 512a, the hook 511 is pushed by the striker 250 and rotates from the unlocked position to the locked position against the biasing force of the first torsion spring.

[0076] As a result, the pole 513 is biased by the second torsion spring and rotates about the first end 513a to an engagement position where it engages with the hook 511 in the locked position. This holds the hook 511 in the locked position. When the pole 513 rotates in this manner, the second link 532 pulls the second link element 533B, causing it to rotate about the shoulder bolt 552a. This releases the cam portion b3 from driving the detector 540, and also forms a clearance c1 between the pressing portion a2 and the pressed portion b2.

[0077] In the seat rotation device 10 described above, the locking device 510 and the release actuator 520 are configured as separate members, which increases the degree of freedom in arranging the locking unit 500 including the locking device 510 and the release actuator 520. Therefore, it is possible to use a general-purpose product having a hook 511 as the locking device 510 and a general-purpose product having an actuator lever 521 as the release actuator 520.

[0078] (Second embodiment) Next, a lock unit 500 of a seat rotation device 10 according to a second embodiment of the present invention will be described with reference to Figures 14 to 18. Note that in the second embodiment, only the parts that are different from the first embodiment will be described, and descriptions of the same structure, action, and effect as those in the first embodiment will not be repeated.

[0079] 14 and 15, in this embodiment, the link member 533 is configured as a single member. An elongated hole 533h connected to the first connecting portion a1 is formed in the link member 533. The end portion 531a of the first link 531 is movable within the elongated hole 533h.

[0080] One end of the biasing member 534 is fixed to the end portion 531 a of the first link 531 , and the other end of the biasing member 534 is fixed to an attachment portion 551 a provided on the first bracket 551 .

[0081] Next, the operation of the lock unit 500 will be described with reference to Figures 16 to 18. Note that the striker 250, hook 511, and detection device 540 are omitted from Figures 16 to 18, and only the first end 513a and second end 513b of the pole 513 are shown.

[0082] 16 shows a state in which the striker 250 is locked, that is, a state in which the actuator lever 521 is in the initial position, the cam portion b3 is separated from the detection device 540, and the hook 511 and the pole 513 are engaged with each other. Also, in FIG. 16, the position of the end 531a of the first link 531 when the actuator lever 521 is in the adjustment position is shown by a two-dot chain line.

[0083] As shown in FIG. 17, when the actuator lever 521 moves from the adjustment position to the release position or full stroke position, the first link 531 presses the first connection portion a1, causing the link member 533 to rotate around the shoulder bolt 552a against the biasing force of the biasing member 534. At this time, the second connection portion b1 pulls the second link 532, causing the pole 513 to rotate around the first end 513a until the second end 513b of the pole 513 moves from the engaged position to the separated position. As a result, the engagement between the hook 511 and the pole 513 is released, allowing the hook 511 to rotate from the locked position to the unlocked position. Note that, as in the first embodiment, the cam portion b3 turns on the detection device 540 when the link member 533 rotates.

[0084] 18 shows a state in which the driving force of the driving source that drives the actuator lever 521 is released. When the driving force of the driving source is released, the first link 531 is pulled by the biasing force of the biasing member 534, and the actuator lever 521 returns to its initial position. At this time, the end 531a of the first link 531 moves within the elongated hole 533h of the link member 533.

[0085] On the other hand, since the pole 513 is in contact with the hook 511 in the unlocked position, the second link 532 cannot move, and the link member 533 cannot rotate around the shoulder bolt 552a.

[0086] As described above, in this embodiment, the link member 533 is made up of a single member, thereby reducing the number of parts.

[0087] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0088] (Aspect 1) A seat rotation device capable of rotating a seat body between a seating position where the seat body faces the front of a vehicle and an entry / exit position where the seat body faces a door opening of the vehicle, a base plate fixed to the floor of the vehicle; a rotation plate fixed to the underside of the seat body so as not to rotate relative to the seat body; a connection unit that connects the base plate and the rotating plate so that the rotating plate can rotate relative to the base plate between the seating position and the getting-on / off position; a lock unit that locks the rotating plate at the seated position, The rotating plate has a striker that is held by the lock unit, The lock unit is a locking device capable of locking the striker; a release actuator configured as a separate member from the locking device, for releasing the locking of the striker by the locking device; a transmission unit that transmits the output of the release actuator to the locking device; a detection device capable of detecting a locked state of the striker by the locking device, the locking device includes a hook that is movable between a locked position that holds the striker when the base plate is in the seated position and an unlocked position that allows the striker to be released, the release actuator includes an actuator lever movable between an initial position and a release position; The seat rotation device, wherein the transmission unit moves the hook from the locked position to the unlocked position and turns on the detection device when the actuator lever moves from the initial position to the released position.

[0089] In this seat rotation device, the locking device and the release actuator are separate components, which increases the flexibility of the arrangement of the locking unit including the locking device and the release actuator, making it possible to use a general-purpose product with a hook as the locking device and a general-purpose product with an actuator lever as the release actuator.

[0090] (Aspect 2) The transmission unit is a first link connected to the actuator lever; a second link connected to the locking device and capable of moving the hook between the locked position and the unlocked position; a link member connected to the first link and the second link, The link member is a first connection portion connected to the first link and pressed against the first link when the actuator lever moves from the initial position to the release position; a second connection portion connected to the second link, which pulls the second link when the first connection portion is pressed by the first link, thereby allowing the hook to move from the locked position to the unlocked position; 2. The seat rotation device according to claim 1, further comprising: a cam portion that drives the detection device.

[0091] (Aspect 3) 3. The seat rotation device according to claim 2, wherein the link member further includes a biasing member that biases the first link so that the actuator lever moves toward the initial position.

[0092] In this embodiment, the biasing force of the biasing member acts on the first link, so when the driving force that moves the actuator lever toward the release position is released, the actuator lever is pressed against the first link, returning it to its initial position.

[0093] (Aspect 4) The link member is a first link element including the first connecting portion; a second link element including the second connection portion and the cam portion and rotatable relative to the first link element, the first link element has a pressing portion that presses the second link element when the first connection portion is pressed by the first link, 4. The seat rotation device according to claim 2, wherein the second link element has a pressed portion that is pressed by the pressing portion.

[0094] (Aspect 5) A seat rotation device as described in any one of aspects 2 to 4, wherein the link member is configured not to pull the second link until the actuator lever moves from the initial position to an adjustment position set between the initial position and the release position, but to pull the second link when the actuator lever moves from the adjustment position toward the release position.

[0095] In this aspect, the hook is prevented from moving to the unlocked position before the actuator lever reaches the release position due to an error in the mounting positions of the locking device and the release actuator.

[0096] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present invention is defined by the claims rather than the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0097] 1 swivel seat, 2 seat body, 3 seat slider, 10 seat rotation device, 100 base plate, 200 rotation plate, 210 side bracket, 220 rear pipe, 230 front pipe, 240 connecting plate, 250 striker, 300 connecting unit, 310 rotating link, 311 fixed end, 312 rotating end, 320 main slider, 321 lower rail, 322 upper slider, 330 sub-slider, 331 lower rail, 332 upper slider, 400 drive unit, 410 motor, 420 gear, 500 lock unit, 510 lock device, 511 hook, 512 housing, 513 pole, 520 release actuator, 521 actuator lever, 522 housing, 530 transmission part, 531 first link, 532 Second link, 533 link member, 533A first link element, 533B second link element, 533h long hole, 534 urging member, 540 detection device, 551 first bracket, 552 second bracket, a1 first connection portion, A1 virtual circle, a2 pressing portion, A2 circle, a3 mounting piece, b1 second connection portion, b2 pressed portion, b3 cam portion, FL floor.

Claims

1. A seat rotation device capable of rotating a seat body between a seating position where the seat body faces the front of a vehicle and an entry / exit position where the seat body faces a door opening of the vehicle, a base plate fixed to the floor of the vehicle; a rotation plate fixed to the underside of the seat body so as not to rotate relative to the seat body; a connecting unit that connects the base plate and the rotating plate so that the rotating plate can rotate relative to the base plate between the seating position and the getting-on / off position; a lock unit that locks the rotating plate at the seated position, The rotating plate has a striker that is held by the lock unit, The lock unit is a locking device capable of locking the striker; a release actuator configured as a separate member from the locking device, for releasing the locking of the striker by the locking device; a transmission unit that transmits the output of the release actuator to the locking device; a detection device capable of detecting a locked state of the striker by the locking device, the locking device includes a hook that is movable between a locked position that holds the striker when the base plate is in the seated position and an unlocked position that allows the striker to be released, the release actuator includes an actuator lever movable between an initial position and a release position; The seat rotation device is configured such that, when the actuator lever moves from the initial position to the release position, the transmission unit moves the hook from the lock position to the unlock position and turns on the detection device.

2. The transmission unit is a first link connected to the actuator lever; a second link connected to the locking device and capable of moving the hook between the locked position and the unlocked position; a link member connected to the first link and the second link, The link member is a first connection portion connected to the first link and pressed against the first link when the actuator lever moves from the initial position to the release position; a second connection portion connected to the second link, which pulls the second link when the first connection portion is pressed by the first link, thereby allowing the hook to move from the locked position to the unlocked position; The seat rotating device according to claim 1 , further comprising: a cam portion that drives the detection device.

3. 3. The seat rotation device according to claim 2, wherein the link member further includes a biasing member that biases the first link so that the actuator lever moves toward the initial position.

4. The link member is a first link element including the first connection portion; a second link element including the second connection portion and the cam portion and rotatable relative to the first link element, the first link element has a pressing portion that presses the second link element when the first connection portion is pressed by the first link, The seat rotation device according to claim 2 or 3, wherein the second link element has a pressed portion that is pressed by the pressing portion.

5. 4. The seat rotation device according to claim 2, wherein the link member is configured not to pull the second link until the actuator lever moves from the initial position to an adjustment position set between the initial position and the release position, but to pull the second link when the actuator lever moves from the adjustment position toward the release position.

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