JP5272723B2 - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To actualize a stopper structure which can be arranged in better appearance for stopping the forward-fall rotation of a seatback on the way. <P>SOLUTION: This vehicular seat 1 is provided for stopping the forward-fall rotation of the seatback 2 on the way at a forward tilting position or laying it down to a full fall-down position. A seat cushion 3 is linked to the seat back 2, and the seat cushion 3 is also linked to a front link 5 which is provided on a floor F in a rising/falling manner. Thus, it sinks down to the lower side in linkage with the forward-fall rotation of the seatback 2 while rotating the front link 5 to fall down. On a link portion between the front link 5 and the seat cushion 3, the stopper structure 40 is provided for locking the rotating movement of the front link 5 relative to the seat cushion 3 to stop the forward-fall rotation of the seatback 2 on the way at the forward tilting position. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat that can stop the forward rotation of a seat back that becomes a backrest halfway at a forward tilt position or can be tilted to a large tilt position beyond the forward tilt position.

  Conventionally, in a vehicle seat, it is possible to perform a halfway stop operation in which the seat back is tilted down and held to a forward tilt position, and a tilt down operation in which the seat cushion is sunk downward and the seat back is largely tilted on the upper surface portion. There is something that looks like this. Here, the following Patent Document 1 discloses a halfway stop structure that stops halfway rotation of the seat back described above.

  In this disclosure, an intermediate stopper having a function of stopping the forward rotation of the seat back halfway is provided on the base frame that supports the seat back with respect to the floor. The intermediate stopper is normally held at a position where the seat back can be stopped halfway. However, by performing a tilt-down operation, the intermediate stopper is moved to a retracted position where the stopper does not function. .

Japanese Patent No. 3723797

  However, in the prior art disclosed above, the intermediate stopper is provided in the vicinity of the reclining device that connects the seat back and the base frame, and the shield provided to cover the entire operating mechanism is enlarged. This causes a problem that the appearance of the entire sheet is deteriorated.

  The present invention was devised as a solution to the above-described problem, and the problem to be solved by the present invention is that the stopper structure for stopping the forward rotation of the seat back can be arranged in a more attractive manner. There is to do.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
First, the first aspect of the present invention is a vehicle seat that can stop the forward rotation of the seat back that is a backrest halfway at a forward tilt position or can be tilted to a large tilt position beyond the forward tilt position. It is. A seat cushion serving as a seating portion is linked to the seat back. In addition, the seat cushion is linked to a tilting link that can rotate up and down with respect to the floor. It sinks to the side. The link connecting part between the raising / lowering link and the seat cushion is provided with a stopper structure that locks the rotational movement of the raising / lowering link with respect to the seat cushion and stops the forward rotation of the seat back halfway at the forward tilt position. It has been. The stopper structure is configured to be switchable between a state that functions as a stopper of the tilting link and a state that does not function. When the stopper structure does not function as a stopper, the front-back rotation of the seat back is allowed to a large tilt position.

  According to the first aspect of the present invention, the tilting rotation of the raising / lowering link is stopped halfway by the stopper structure, so that the forward tilting rotation of the seat back is stopped halfway at the forward tilt position. Further, when the stopper structure does not function as a stopper, the tilting link does not stop turning halfway, and the seatback forward tilting rotation is performed to the position where it is greatly tilted. As described above, the stopper structure is provided at the link connecting portion between the raising and lowering link and the seat cushion so as to restrict the rotation of the raising and lowering link, so that the stopper structure can be configured in a small size and arranged with a good appearance. it can.

  Next, according to a second aspect, in the first aspect described above, the stopper structure has two rotating members that are rotatably supported by the seat cushion. These rotating members are supported so as to be able to rotate around different axes, and are brought into contact with each other by rotating in opposite directions so as to restrict the rotational movement of each other. ing. The raising / lowering link abuts against one of the two rotating members due to the fall-down rotation, and applies a pressing force in a rotating direction against the other rotating member. At this time, when the other rotating member is in a stopper function state where the other rotating member abuts against the one rotating member, the rotation of the tilting link is stopped halfway by the restriction of the rotational movement. However, when the other rotating member is in the retracted position where the one rotating member does not abut, the falling rotation of the raising / lowering link is not stopped halfway.

  According to the second aspect of the present invention, the stopper structure is formed in a relatively simple and compact manner by being constituted by the two rotating members that restrict the rotational movement of each other by causing the stopper structure to rotate and abut against each other. be able to.

  Next, according to a third invention, in the first or second invention described above, the seat back can slide in the vehicle front-rear direction with respect to the floor via a reclining device functioning as a rotation shaft device that can be fastened. It is connected to the base body provided in the. The raising / lowering link is provided by linking the seat cushion and the base body. By the operation of the walk-in lever provided on the vehicle seat, the rotation-retained state by the reclining device is released, and the stopper structure is made to function as a stopper. At the same time, the slide lock state with respect to the floor of the base body is released, and the vehicle seat is switched to a state in which the vehicle seat can be retracted to the front side of the vehicle. When the tilt down lever provided on the vehicle seat is operated, the rotation retaining state by the reclining device is released, and the stopper structure is not functioned as a stopper, so that the seat cushion largely sinks downward and the upper surface portion thereof. The seat back is folded into the position so that it is fully collapsed.

  According to the third aspect of the present invention, the vehicle seat can be slid to the front side of the vehicle as the seat back is brought down to the forward tilt position by the operation of the walk-in lever. As a result, the space in which the vehicle seat is installed can be widened, and the seated passenger on the rear seat can get on and off from the free space. Further, the vehicle seat is in a state in which the seat back is folded into the upper surface portion thereof as a state in which the seat cushion is largely sunk downward by the operation of the tilt down lever. Thereby, it can be set as the state which folded the vehicle seat small downward.

  Next, according to a fourth aspect, in the second or third aspect described above, the two rotating members are biased in the rotational direction in which they are abutted against each other. The other rotating member that keeps the rotation of one rotating member that is pushed around by the tilting rotation of the raising / lowering link is normally held in a state where it can be pressed against the one rotating member and function as a stopper. However, the rotation operation is performed against the urging force, so that the movement operation is performed to the retreat position away from the contact with the one rotation member. The restricting shape in which both rotating members abut against each other and restrict the rotational movement is such that even if one rotating member is pressed against the tilting link and abutted against the other rotating member, the other rotating member It has a relief shape that can be retreated.

  According to the fourth aspect of the present invention, even if both the rotating members are pressed against the raising and lowering links and abut against each other to restrict the rotational movement, the other rotating member is retracted and the rotational regulation is performed. The state can be released. Therefore, even when the rotation of the raising / lowering link is stopped halfway by both rotating members, the halfway stop state can be released.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the vehicle seat 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 1 of this embodiment is employed as a second row seat of a vehicle provided with a three row seat. The vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant, and a seat cushion 3 that serves as a seating part, and these are connected to a base frame 4 and supported by a floor F. It has become. Here, the base frame 4 corresponds to the base body of the present invention.

  Specifically, in the seat back 2 described above, the back frame 2F that forms the skeleton is formed in a gate shape, and the lower end side portions that form both legs are respectively in relation to the base frame 4 provided on the outside thereof. They are connected via a reclining device 10. Here, the reclining device 10 is configured as a rotation shaft device that can be rotationally retained, and is normally in a rotationally retained state (locked state), and the backrest angle of the seat back 2 with respect to the base frame 4 is fixed. It is held in a state.

  And each reclining apparatus 10 is in the rotation stop state, when the walk-in lever 6 provided in the side part (the side part on the left side seeing from the seated occupant) of the vehicle seat 1 is pulled up. Are released all at once. Specifically, the walk-in lever 6 described above is connected to an operation arm 11 that performs a switching operation of unlocking the reclining device 10 on each side by a first release cable 8.

  Specifically, the first release cable 8 is bifurcated in the middle, and the branched end of each side is connected to the operation arm 11 of the reclining device 10 on each side described above. Thereby, the walk-in lever 6 can operate the operation arm 11 of the reclining device 10 on each side by the pulling-up operation, and can release these rotationally locked states all at once.

  And since the fixed state of the backrest angle of the seat back 2 is released by this release operation, the seat back 2 can rotate around the rotation center 10R of each reclining device 10, that is, the backrest. The angle can be adjusted. Then, by adjusting the backrest angle of the seat back 2 and stopping the operation of the walk-in lever 6, each reclining device 10 is returned to the rotation-retained state, and the seat back 2 is adjusted. The state is fixed at the angular position.

  Here, an urging spring (not shown) is applied between the seat back 2 (back frame 2F) and the base frame 4 to apply an urging force in a direction to always rotate the seat back 2 in the forward direction. . As a result, the seat back 2 is operated to move in the forward rotation direction by the urging force by the operation of the above-described walk-in lever 6 being performed and the rotation stopping state of each reclining device 10 being released. ing.

  Here, the above-described base frame 4 is provided with a release link 30 that is rotated in response to the forward rotational movement of the above-described seat back 2. As shown in FIG. 2, the release link 30 is pivotally connected to the base frame 4 by a support shaft 31, and is normally not energized before the seat back 2 tilts forward. It is held at the standby position shown in the figure by the biasing force of the spring.

  As shown in FIG. 7, when the seat back 2 rotates forward, the release link 30 has an engagement pin 32 provided at the upper end of the link formed at the lower end of the back frame 2F. The leg 2B is pushed and kicked and rotated about the support shaft 31 in the clockwise direction in the figure. Here, the release link 30 is connected to a third release cable 25 for releasing the slide lock state of the slider device 20 that slide-locks the base frame 4 with respect to the floor F. The third release cable 25 is pulled when the release link 30 is pushed and rotated as described above, and the slide lock state of the slider device 20 is released.

  Here, the slider device 20 includes a lower rail 22 fixedly installed on the floor F and an upper rail 21 fixedly installed on the lower surface portion of the base frame 4, and the upper rail 21 extends in the vehicle longitudinal direction with respect to the lower rail 22. It is configured to be slidable. The above-described upper rail 21 is provided with a lock mechanism portion 23 that can lock the slide movement (relative movement) of the upper rail 21 by engaging with the lower rail 22.

  The locking mechanism 23 is normally held in a state where the sliding movement of the upper rail 21 is locked by an urging force of an urging spring (not shown). And the lock mechanism part 23 is connected with the 3rd cancellation | release cable 25 connected with the above-mentioned cancellation | release link 30, and when the 3rd cancellation | release cable 25 is pulled by the front rotational movement of the seat back 2, The locked state is released.

  Therefore, the upper rail 21 can be slid relative to the lower rail 22 by this release. Here, between the spring hook portion 4B formed on the base frame 4 and the spring hook portion 22A formed on the lower rail 22, the upper rail 21 is always urged to move to the vehicle front side (left side in the figure). A tension spring 26 is hooked. Thereby, the seat back 2 is rotated forward by the operation of the walk-in lever 6 described above, so that the slide lock state of the slider device 20 is released and the vehicle seat 1 is moved to the front side of the vehicle by the urging. It has become so.

  The unlocking operation of the lock mechanism 23 of the slider device 20 described above can also be performed by the seated occupant pulling up the release lever 24 provided to extend to the front lower portion of the seat cushion 3 during normal seating use. It can be done.

  In this way, the vehicle seat 1 is operated to rotate forward to a forward tilted position where the seat back 2 is rotationally held by a stopper structure 40 described later by operating the walk-in lever 6, and the slider device 20. The slide lock state is released, and the entire seat is slid to the front side of the vehicle. And since this movement widens the space in which the vehicle seat 1 is installed, a seated passenger on the rear third row seat (not shown) can get on and off the space slowly. become able to.

  Note that the release link 30, the slider device 20, and the stopper structure 40 described above are provided in a pair on the left and right sides of the vehicle seat 1. Returning to FIG. 2, the seat cushion 3 described above is configured such that the cushion frame 3 </ b> F constituting the skeleton is assembled in a square frame shape by a round pipe. The cushion frame 3F is connected to the base frame 4 through front links 5 at the left and right front portions, and to the back frame 2F through boomerang links 3D at the left and right rear portions. Has been.

  Here, the front link 5 corresponds to the raising / lowering link of the present invention. Specifically, the front link 5 is pivotally connected at its upper end to a link bracket 3M coupled and fixed to the cushion frame 3F by a support shaft 5A, and the lower end of the front link 5 is connected to the base frame 4 by a support shaft 5B. It is rotatably connected to the shaft. Further, the boomerang link 3D has a shape bent in an L shape, and an arm portion facing the front side is integrally coupled and fixed to a side portion of the cushion frame 3F, and an upper side of the rear end side is The facing arm portion is pivotally connected to the back frame 2F by a support shaft 3T.

  As a result, when the reclining device 10 described above is in a rotation-retained state, the seat cushion 3 is brought into a posture position corresponding to the fixed tilt posture of the seat back 2 by the support by the front link 5 and the boomerang link 3D. It is supposed to be retained. Then, as shown in FIG. 7, the seat cushion 3 is operated with the walk-in lever 6 and the reclining device 10 is released from the rotation-retained state. The front link 5 is pushed down from the rear side by the support shaft 3T, and the front link 5 is swung downward and rotated downward.

  When the walk-in lever 6 is operated, the sinking movement of the seat cushion 3 is caused by the stopper structure 40 provided at the link connecting portion (link connecting portion by the support shaft 5A) between the front link 5 and the seat cushion 3. The front link 5 is locked when the falling-down rotation is stopped halfway. However, in the vehicle seat 1, as shown in FIGS. 8 to 9, the tilt-down lever 7 provided on the outer side of the vehicle seat 1 is lifted together with the walk-in lever 6 described above. In this case, the stop rotation of the front link 5 by the stopper structure 40 is not stopped halfway, and the forward rotation movement of the seat back 2 is performed to the position where it is greatly tilted.

  Hereinafter, the configuration of the stopper structure 40 will be described in detail. That is, as shown in FIG. 2, the stopper structure 40 includes an arm-shaped pole 41 and a latch 42 that are pivotally connected to the link bracket 3M so as to be rotatable. Here, the pole 41 corresponds to the other rotating member of the present invention, and the latch 42 corresponds to one rotating member of the present invention. Specifically, the pole 41 is rotatably supported by a support shaft 41A integrally coupled to the link bracket 3M. Between the pole 41 and the link bracket 3M, a torsion spring 41S that urges the pole 41 to rotate clockwise is shown.

  As shown in FIG. 3, the torsion spring 41 </ b> S has an inner end hooked and fixed to the above-described support shaft 41 </ b> A, and an outer end hooked to a spring hook portion 41 </ b> B formed to be bent on the pole 41. Has been. Thus, as shown in FIG. 2, the pole 41 is normally formed at the distal end portion (the upper end portion in the drawing) of the arm as being rotated and biased in the clockwise direction by the biasing force of the torsion spring 41S. The corner portion 41D is held in a state of being pressed against the outer peripheral surface of the latch 42.

  Here, the end of the second release cable 9 connected to the tilt down lever 7 described above is connected to the pole 41 described above. As a result, the pole 41 is rotated counterclockwise in the figure against the urging of the torsion spring 41S by the pulling-up operation of the tilt down lever 7, and is released from the contact state with the outer peripheral surface of the latch 42. It is supposed to be. Here, the above-described second release cable 9 is configured to be bifurcated in the middle, and two ends of the branched cables are connected to the poles 41 on each side.

  Further, the remaining two ends of the branched second release cable 9 are connected to the release link 30 on each side described above. Accordingly, as shown in FIG. 8, the release link 30 is pulled up to the retracted position where it is not pushed and kicked by the leg 2B of the seat back 2 when the tilt down lever 7 is pulled up. It is like that.

  On the other hand, returning to FIG. 2, the above-described latch 42 is rotatably supported by a support shaft 5 </ b> A that is a connecting shaft on the upper end side of the front link 5 described above. Here, the support shaft 5A is integrally coupled and fixed to the link bracket 3M, and rotatably supports the front link 5 and the latch 42 described above. Between the latch 42 and the link bracket 3M, a torsion spring 42S that urges the latch 42 to rotate in the counterclockwise direction is hooked.

  As shown in FIG. 3, the torsion spring 42 </ b> S has an inner end hooked and fixed to the above-described support shaft 5 </ b> A, and an outer end hooked to a spring hook portion 42 </ b> B formed by bending the latch 42. Has been. As a result, as shown in FIG. 2, the latch 42 is normally formed at the tip end portion (the upper end portion in the drawing) of the arm as being rotated and biased in the clockwise direction by the biasing force of the torsion spring 42S. The corner portion 42D is held in a state where it abuts against the corner portion 41D of the pole 41 described above.

  As a result, the latch 42 and the pole 41 are normally restricted from rotating each other with the corners 42D and 41D being in contact with each other by the biasing action that is rotationally biased in the opposite directions. It is held in a state of mutual contact. As shown in FIG. 8, the latch 42 is released from the rotational movement restricted state by the pawl 41 when the pawl 41 is rotated counterclockwise by operating the tilt down lever 7. Is done.

  As a result, the latch 42 is held in a state of being rotationally moved to a position in contact with the stopper 3Ms formed on the link bracket 3M by the biasing force of the torsion spring 42S. Here, referring back to FIG. 3, a stopper pin 42 </ b> P that contacts the front link 5 when the front link 5 rotates forward is provided at the tip (right end) of the arm of the latch 42 described above. The stopper pin 42P is provided to extend in the axial direction from the tip of the latch 42, and as shown in FIG. 2, the latch 42 and the pole 41 are abutted against each other, and the rotation is restricted. By operating the walk-in lever 6, the front link 5 comes into contact with the front link 5 by rotating forward by a certain amount as the seat back 2 rotates forward (see FIG. 7).

  Then, when the front link 5 abuts against the stopper pin 42P in this way, the latch 42 receives an acting force that the front link 5 is further tilted forward and tends to be pushed counterclockwise in the drawing. Receive power. However, since the latch 42 is in a state in which the rotation of the latch 42 is abutted against the pole 41, the front link 5 is prevented from further rotating forward by this regulating force. Thereby, the forward tilting rotation of the front link 5 is stopped halfway, and the forward tilting rotation of the seat back 2 is stopped halfway at the forward tilt position shown in FIG.

  On the other hand, as shown in FIG. 8, when the tilt down lever 7 is pulled up, the latch 42 is retracted in the counterclockwise direction as shown in the figure, and the latch 42 is engaged with the stopper 3Ms by the urging force of the torsion spring 42S. It is rotated to the position where it abuts. Thereby, even if the front link 5 is tilted and rotated as the seat back 2 is tilted forward, the latch 42 greatly collapses the tilting rotation of the front link 5 without stopping the tilting rotation of the front link 5 halfway. The position is allowed (see FIG. 9).

  Here, the tilt-down lever 7 described above will be described in detail later, but in accordance with the lifting operation, the above-described walk-in lever 6 can be lifted together during the operation (state of FIG. 8). It is configured to be able to. As a result, the vehicle seat 1 is greatly tilted forward to the position where the seat back 2 overlaps the upper surface of the seat cushion 3 by the lifting operation of the tilt down lever 7.

  As the seat back 2 is greatly tilted, the front link 5 is also largely tilted forward, so that the seat cushion 3 is also largely depressed downward. As a result, the vehicle seat 1 is operated so that the seat back 2 is overlapped with the upper surface of the seat cushion 3 that has largely sunk on the floor F, and the entire seat is folded slightly on the floor F. It is supposed to be.

  Hereinafter, the operation structure of the walk-in lever 6 and the tilt-down lever 7 will be described in detail with reference to FIGS. 2 and 4 to 6. That is, referring to FIG. 2, the walk-in lever 6 and the tilt-down lever 7 are pivotally connected to a lever bracket 3N fixedly installed on the side of the cushion frame 3F so as to be rotatable.

  Specifically, as shown in FIG. 5, the walk-in lever 6 has a resin handle 6 </ b> A that is an operation handle thereof coupled to a first arm 6 </ b> B made of a steel plate, and the first arm 6 </ b> B is It is rotatably connected to the lever bracket 3N by a support shaft 3P. More specifically, the support shaft 3P is welded to and integrated with the first arm 6B, and is provided so as to be rotatable with respect to the lever bracket 3N.

  A second arm 6C made of a steel plate is welded and integrally connected to the support shaft 3P, and the first release cable 8 described above is attached to the tip of the arm of the second arm 6C. It is connected. Then, an energizing force in one rotational direction is applied to the support shaft 3P between the support shaft 3P and the lever bracket 3N to hold the walk-in lever 6 in the rotation position before the operation (see FIG. 4). The torsion spring 3S is hooked.

  The torsion spring 3S urges the walk-in lever 6 to rotate counterclockwise in FIG. 4, and the walk-in lever 6 receives the urging force to receive the first arm 6B or the second arm 6C (see FIG. 4). 5) is held in a rotationally locked state by being pressed against a locking portion (not shown) formed on the lever bracket 3N. The walk-in lever 6 configured as described above is rotated integrally with the support shaft 3P when the operator grasps the handle 6A and pulls it up, so that the first arm 6B and the second arm 6C (see FIG. 5) are integrated. When operated, the first release cable 8 is pulled.

  As a result, as shown in FIG. 7, the operation arm 11 of the reclining device 10 on each side connected to the first release cable 8 is rotated, and the retentive state of the reclining device 10 on each side is released. The On the other hand, referring back to FIG. 5, the tilt down lever 7 has a resin handle 7A as an operation handle coupled to a third arm 7B made of a steel plate. It is provided so as to be pivotally supported so as to be rotatable with respect to 3P.

  The aforementioned second release cable 9 is connected to the tip of the arm of the third arm 7B. Then, an urging force in one rotational direction is applied to the third arm 7B between the third arm 7B and the lever bracket 3N, and the tilt down lever 7 is rotated to the rotational position before the operation (solid line in FIG. 4). An urging spring (not shown) that is held at the position is hooked.

  This urging spring urges the tilt-down lever 7 to rotate counterclockwise in FIG. 4, and the tilt-down lever 7 receives this urging force to cause the third arm 7B (see FIG. 5) to The lever bracket 3N is held in a rotationally locked state by being pressed against a locking portion (not shown) formed on the lever bracket 3N. The tilt-down lever 7 configured as described above pulls the second release cable 9 by rotating the third arm 7B when the operator grips and pulls up the handle 7A.

  As a result, as shown in FIG. 8, both the pole 41 on each side connected to the second release cable 9 and the release link 30 on each side are rotated in the counterclockwise direction shown in the figure. By the way, as shown in FIG. 4, the tilt down lever 7 described above is lifted up to an intermediate position as shown by the phantom line in FIG. You can take 6 with you.

  Specifically, as shown in FIG. 6, the handle 7 </ b> A of the walk-in lever 6 is lifted to the third arm 7 </ b> B coupled to the handle 7 </ b> A of the tilt-down lever 7 described above. A hook portion 7C that is in contact with the first arm 6B coupled to the lower side from the lower side is bent. The hook portion 7C is brought into contact with the lower surface of the first arm 6B when the tilt down lever 7 is pulled up to the middle position described above, and then further pulled up to perform the first arm 6B. By pushing up, the walk-in lever 6 is rotated integrally.

  Accordingly, as shown in FIG. 9, the vehicular seat 1 is configured such that the pawl 41 and the release link 30 are retracted and the reclining device 10 is released from the rotation-retained state by a single operation of the tilt-down lever 7. It is performed collectively, and it is designed to be folded small on the floor F. Further, as described above, the engagement between the tilt-down lever 7 and the walk-in lever 6 is performed by the contact between the hook portion 7C of the iron first arm 6B and the third arm 7B. Therefore, the resin handles 6A and 7A do not come into contact with each other, and whitening is prevented.

  Thus, according to the vehicle seat 1 of the present embodiment, the forward rotation of the seat back 2 is stopped halfway at the forward tilt position by the stopper structure 40 stopping the front link 5 from falling forward. The Further, when the stopper structure 40 does not function as a stopper, the front link 5 does not stop rotating halfway, and the seatback 2 moves forward to the position where it is largely tilted. As described above, the stopper structure 40 is provided at the link connecting portion between the front link 5 and the seat cushion 3 so as to restrict the rotation of the front link 5 so that the stopper structure 40 is configured in a small size and nicely arranged. can do.

  Further, since the stopper structure 40 is constituted by two rotating members (a pole 41 and a latch 42) that restrict the rotational movement of each other by rotating and abutting each other, the stopper structure 40 can be made relatively simple and compact. Can be formed.

  Further, the regulation shape in which the pole 41 and the latch 42 abut against each other to restrict the rotational movement rotates in the direction in which the pole 41 is retracted even after the corners 41D and 42D are abutted against each other. It has a relief shape that can be moved. Therefore, even when the pole 41 and the latch 42 are pressed against the front link 5 and abut against the corners 41D and 42D to restrict the rotational movement, the pole 41 is retracted and rotated. The restricted state can be released.

  Therefore, in this embodiment, the reclining device 10 is released after the retreating movement of the pole 41 is performed first, but the reclining device 10 is released first and the front link 5 is operated. Even after the fall rotation of the pole 41 is stopped halfway by the pawl 41 and the latch 42, the pawl 41 can be retreated and the halfway stop can be released.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, in the above embodiment, the front link is tilted forward and the seat cushion sinks downward in conjunction with the forward rotation of the seat back. However, the front link is tilted backward and the seat cushion May be in the form of sinking.

  In addition, the stopper structure is in a state of functioning as a stopper during normal time and walk-in operation, and a configuration in which the stopper function is switched to a state where the stopper function is not performed by performing a tilt-down operation is illustrated as being reverse switching. It may be a thing. In other words, the stopper function does not function during normal operation and tilt-down operation, and can be switched to the stopper function by performing a walk-in operation.

  In the above embodiment, the walk-in lever is collectively operated by the operation of the tilt-down lever, and the walk-in lever is first switched to the state in which the stopper structure does not function as a stopper by the operation of the tilt-down lever. The configuration is shown in which the seat back is rotated forward by the above operation. However, according to the configuration of the present invention, the operation of the walk-in lever is first performed to stop the seat back halfway at the forward tilt position, and then the operation of the tilt down lever is performed to switch the stopper structure to a non-functional state. The seat back may be greatly defeated. However, in this case, it is necessary to pay attention to the fact that the stopper operation requires a weight associated with the fall of the seat back or the seat cushion, so that the intermediate stop release operation load becomes heavy.

  Further, the configuration in which the slide lock state of the slider device is released by the walk-in operation in which the seat back is tilted to the forward tilt position is illustrated, but in particular, the slide lock state of the slider device may not be released. Absent.

1 is a schematic configuration diagram of a vehicle seat according to Embodiment 1. FIG. It is a block diagram showing the seating use state of the vehicle seat. It is a partial expansion perspective view of a stopper structure. It is the side view which expanded and represented the operation structure of each lever. It is the VV sectional view taken on the line of FIG. It is the perspective view which looked at the operation structure of each lever from the back back side. It is a side view of the vehicle seat showing the state which operated the walk-in lever. It is a side view of the vehicle seat showing a state in which the tilt down lever is operated to a middle position. It is a side view of the vehicle seat showing the state where the tilt down lever is operated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2F Back frame 2B Leg 3 Seat cushion 3F Cushion frame 3D Boomerang link 3M Link bracket 3Ms Stopper 3N Lever bracket 3P Support shaft 3S Torsion spring 3T Support shaft 4 Base frame (base body)
4B Spring hook part 5 Front link (rising link)
5A support shaft 5B support shaft 6 walk-in lever 6A handle 6B first arm 6C second arm 7 tilt down lever 7A handle 7B third arm 7C hook 8 first release cable 9 second release cable 10 reclining device 10R rotation center DESCRIPTION OF SYMBOLS 11 Operation arm 20 Slider device 21 Upper rail 22 Lower rail 22A Spring hook part 23 Lock mechanism part 24 Release lever 25 Third release cable 26 Tension spring 30 Release link 31 Support shaft 32 Engagement pin 40 Stopper structure 41 Pole (the other rotating member)
41A Support shaft 41B Spring hook portion 41S Torsion spring 41D Corner portion 42 Latch (one rotating member)
42B Spring hook part 42P Stopper pin 42S Torsion spring 42D Corner part F Floor

Claims (3)

It is a vehicle seat that can stop the forward tilt rotation of the seat back that becomes a backrest at a forward tilt position or can be tilted to a large tilt position beyond the forward tilt position,
A seat cushion as a seating portion is linked to the seat back, and the seat cushion is further linked to a raising / lowering link provided to be rotatable relative to the floor. It is designed to sink to the lower side while collapsing and rotating the rising and falling link in conjunction with the forward tilting rotation.
A stopper structure capable of locking the rotation movement of the raising / lowering link with respect to the seat cushion at the link connecting portion between the raising / lowering link and the seat cushion to stop the forward-turning rotation of the seat back halfway at the forward tilt position. The stopper structure is configured to be switchable between a state that functions as a stopper of the raising / lowering link and a state that does not function. When the stopper structure does not function as a stopper, the forward rotation of the seat back is greatly reduced. To allow up to position ,
The stopper structure has two rotating members that are rotatably connected to the seat cushion, and the rotating members are supported so as to be able to rotate around different axis centers and are in mutually opposite directions. The rotating links come into contact with one of the two rotating members by the falling rotation, and the other is moved against the other. When the other rotating member is in a stopper function state where it abuts against the one rotating member, the tilting link falls down due to the restriction of the rotational movement. Is stopped halfway, but when the other rotating member is in a retracted position where the one rotating member does not hit the one rotating member, Vehicle seat, characterized in that it is not the way to stop. The vehicle seat according to claim 1,
The seat back is connected to a base body that is slidable in the vehicle front-rear direction with respect to the floor via a reclining device that functions as a rotating shaft device that can be fastened. The base body is provided with a link connection, and the rotation stop state by the reclining device is released by the operation of a walk-in lever provided on the vehicle seat, and the stopper structure is in a state of functioning as a stopper. The seat back is tilted forward to a forward tilt position and stopped halfway and the slide lock state with respect to the floor of the base body is released, and the vehicle seat is switched to a state in which the vehicle seat can be retracted to the front side of the vehicle, The reclining device is operated by operating a tilt down lever provided on a vehicle seat. The stopper structure is released and the stopper structure does not function as a stopper, so that the seat cushion is greatly sunk downward and the seat back is folded on the upper surface portion to the position where it is largely collapsed. A vehicle seat characterized by being brought down . The vehicle seat according to claim 1 or 2,
The two rotating members are urged in the rotation direction against each other, and the other rotating member that fastens one rotating member that is pushed around by the tilting rotation of the raising and lowering link is always the one rotating member. The rotating member is pressed against the rotating member and held in a state that can function as a stopper, but is rotated against the urging force to move to a retracted position away from contact with the one rotating member. The restricting shape in which the two rotating members abut against each other and restrict the rotational movement is pressed against the other rotating member by the one rotating member being pressed against the raising / lowering link. state is the other of the rotary member even after being relief shaped is retracted moving the vehicle seat, characterized in Rukoto was.

Images