JP5272724B2 - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stopper structure which is 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 a front link 5 is linked to the seat cushion 3 via a base frame 4. The seat cushion 3 sinks down to the lower side in linkage with the forward-fall rotation of the seatback 2 while involving the fall-down rotation of the front link 5. On a link section between the front link 5 and the base frame 4, the stopper structure 40 is provided for locking the rotating movement of the front link 5 to stop the forward-fall rotation of the seatback 2 on the way at the forward tilting position. The stopper structure 40 can be changed over to the functioning state or non-functioning state as a stopper. <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 operating the tilt down lever, the intermediate stopper is moved to a retracted position where the stopper does not function. Yes.

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 the rising and falling link provided on the base body fixed on the floor so that it can be rotated up and down. It is designed to sink to the lower side while falling and rotating. The link connecting part between the raising and lowering link and the base body has a stopper structure that locks the rotational movement of the raising and lowering link with respect to the base body and can stop the forward rotation of the seat back halfway at the forward tilt position. Is provided. 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 base body to restrict the falling rotation of the raising and lowering link, so that the stopper structure can be made compact and arranged with good appearance. it can. In addition, the stopper structure is provided at the connecting part between the base body (fixed body) fixed on the floor and the raising and lowering link (movable body), so that it is like the connecting part between the raising and lowering link and the seat cushion. Compared with the structure provided in the connection part of such movable bodies, the variation in the stopper position (intermediate stop position) which arises by the dimensional error of each part can be suppressed small.

  Next, according to a second aspect of the present invention, in the first aspect described above, the stopper structure can be held at each position where the stopper structure is switched between a state where it functions as a stopper and a state where it does not function. Is provided.

  According to the second aspect of the invention, since the holding structure is held at each position where the stopper structure is switched to the non-functional state and the non-functional state, it is not necessary to maintain the switching operation state. The operability of the structure switching operation can be improved.

  Next, according to a third aspect, in the first or second aspect described above, the stopper structure is normally held in a state of functioning as a stopper, and is switched to a state of not functioning as a stopper so that the seat back is large. By rotating forward and tilting to the tilted position, it is pushed and moved by the tilting link that is tilted and rotated so that it can be switched to a state that functions as a stopper.

  According to the third aspect of the present invention, the stopper structure is switched to a state in which the stopper functions as the seat back by largely tilting the seat back and rotating it forward to the position. Therefore, when the seat back is returned to the normal posture in which the seat back can be used, the stopper structure is returned to a state where the original stopper function is possible, so that the switching operation of the stopper structure can be simplified. .

  Next, according to a fourth aspect of the present invention, in any one of the first to third aspects described above, the seat back is connected to the base body via a reclining device that functions as a rotation shaft device that can be fastened. The base body is provided to be slidable in the vehicle front-rear direction with respect to the floor, and is normally held in a slide-locked state. By operating the walk-in lever provided on the vehicle seat, the reclining device is released from the rotationally stopped state, and the stopper structure is brought into the stopper functioning state, so that the forward rotation of the seat back is brought to the forward tilt position. 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. Then, the operation of the tilt down lever provided on the vehicle seat releases the rotation of the reclining device and the stopper structure does not function as a stopper, so that the seat cushion sinks greatly downward. At the same time, the seat back is folded down to the upper surface so that the seat back is folded down to the position.

  According to the fourth aspect of the 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 fifth invention, in any one of the first to fourth inventions described above, the stopper structure has the following configuration. In other words, the stopper member that is rotatably connected to the base body is normally held in a rotational posture in contact with the engaging portion provided on the base body by urging. Then, when the engaging pin provided on the raising / lowering link comes into contact with the stopper member held in the posture by this contact by the falling rotation of the raising / lowering link, the falling rotation of the raising / lowering link is stopped halfway. The stopper member is engaged with an engagement member provided in the base body by being rotated in a direction to be removed from the contact with the locking portion, and is held in the retracted position that has been rotated. The tilting link is allowed to fall without stopping midway. A stopper function that the engaging member is pushed and moved to release the state of holding the stopper member by the large falling rotation beyond the stopping position of the raising / lowering link halfway, and the stopper member comes into contact with the locking part by urging is possible. Is returned to the correct rotational posture.

  According to the fifth aspect of the present invention, the stopper member that receives the rotation of the raising / lowering link and stops it halfway is removed from the position in contact with the locking portion (stopper function position) by the rotation operation, thereby being engaged. It will be in the state hold | maintained in the retracted position state which engaged with the member and was rotated. Therefore, the raising / lowering link can be tilted and rotated to the position of being largely tilted beyond the midway stopping position without requiring an operation of holding the stopper member at the retracted position. The stopper member is a stopper that is brought into contact with the locking portion by the urging force when the engaging member is pushed and moved by the movement in which the raising and lowering link is pushed down to the position and the posture holding state by the engaging member is released. Return to a functioning rotational position. Therefore, when the seat back is returned to the normal posture in which the seat back can be used, the stopper structure is returned to a state where the original stopper function is possible, so that the switching operation of the stopper structure can be simplified. .

  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 to the seat back 2 so as to always rotate 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 be engaged with the lower rail 22 to lock the sliding movement (relative movement) of the upper rail 21.

  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 seatback 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 a stopper structure 40 provided at a link connecting portion (link connecting portion by the support shaft 5B) between the front link 5 and the base frame 4. 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 stopper member 41 and a cam-shaped engaging member that are rotatably coupled to the base frame 4 by supporting shafts 41 </ b> A and 42 </ b> A. 42. Specifically, as shown in FIG. 3, the stopper member 41 is always illustrated by the urging force of the torsion spring 41 </ b> S that is hooked between the stopper plate 41 and the locking plate 4 </ b> C integrally fixed to the base frame 4. As a state of being rotationally biased in the counterclockwise direction (forward tilt direction), it is held in a rotational posture state in contact with the locking plate 4C. Here, the locking plate 4C corresponds to the locking portion of the present invention.

  The stopper member 41 abuts against the engaging pin 5P connected to the front link 5 (see FIG. 7) when the front link 5 is rotated forward and rotated on the surface portion on the upper edge side in the figure (see FIG. 7). A stopper surface 41B is formed which can stop the forward tilting rotation of the seatback 2 at a position where the seatback 2 assumes a forward tilting posture. As shown in FIGS. 2 to 3, the second release cable 9 connected to the tilt-down lever 7 is connected to the stopper member 41 described above.

  As a result, as shown in FIG. 8, the stopper member 41 is rotated clockwise in the illustrated direction against the bias of the torsion spring 41S as the tilt down lever 7 is pulled up, As shown in FIG. 9, even if the front link 5 rotates forward and tilts, the front link 5 can be switched to a state in which the front link 5 is allowed to rotate to the large tilt position without interfering with the engaging pin 5 </ b> P. ing.

  On the other hand, returning to FIG. 3, the engagement member 42 is normally urged to rotate counterclockwise in the figure by the urging force of the torsion spring 42S hooked between the engagement plate 4C and the engagement plate 4C. As described above, the corner portion 42 </ b> B protruding from the outer peripheral portion of the stopper member 41 is held in a rotating posture state pressed against the outer peripheral surface formed by bending the stopper member 41. As shown in FIG. 8, the engaging member 42 moves on the outer peripheral surface of the stopper member 41 when the tilt-down lever 7 is pulled up and the stopper member 41 is rotated clockwise in the figure. It slides over the step of the corner portion 41C formed to protrude from the outer peripheral portion of the stopper member 41, and falls below the step.

  As a result, the stopper member 41 is in a state where its rotationally biased rotational movement in the counterclockwise direction is restricted by the engagement between the corner portion 41C and the corner portion 42B, and is pulled by the second release cable 9. It will be held in the operated retracted position state (state that does not function as a stopper). Therefore, the stopper member 41 can be held in the retracted position without maintaining the operation state of the tilt down lever 7 that pulls the second release cable 9.

  As shown in FIG. 9, the posture holding state of the stopper member 41 by the engaging member 42 is pushed and moved by the tilting rotation of the front link 5 due to the large tilting rotation of the seat back 2. It is to be released by being. Specifically, the engaging member 42 is formed with a hook portion 42C that is inserted into a long hole 4D penetratingly formed in the base frame 4 and protrudes from the long hole 4D.

  The hook portion 42C is pushed downward by the front link 5 when the front link 5 is largely collapsed and rotated. By this movement, the engaging member 42 is rotated clockwise in the figure. It has come to be. As a result, the engagement between the corner portion 41C and the corner portion 42B is released, the posture holding state of the stopper member 41 by the engaging member 42 is released, and the stopper member 41 is restored to the original stopper by the urging force of the torsion spring 41S. The rotational position is returned to contact with the functioning locking plate 4C.

  Therefore, when the seat back 2 and the seat cushion 3 are returned to the original seating and useable posture state described above with reference to FIG. 2, the stopper member 41 is returned to the original posture state that can function as a stopper. Will be held. Further, the engaging member 42 releases the state in which the hook 42C is pushed down by the front link 5 by the operation of raising the front link 5 to return the seat back 2 and the seat cushion 3 to the posture in which the seat back 2 and the seat cushion 3 can be used. Thus, the initial rotation posture state in which the corner portion 42B is pressed against the outer peripheral surface of the stopper member 41 is again returned by the biasing force of the torsion spring 42S.

  The second release cable 9 described above is branched into four forks from the end on the side connected to the tilt down lever 7, and two of the branched ends are on each side described above. The stopper member 41 is connected. The remaining two ends of the second release cable 9 are connected to the release link 30 on each side described above. Accordingly, as shown in FIG. 8, when the tilt-down lever 7 is pulled up, the stopper member 41 on each side is switched to the retracted position state (the state where the stopper does not function), and the release link on each side. 30 is pulled into the retracted position where it is not pushed and kicked by the leg 2B of the seat back 2.

  As a result, even if the front link 5 falls and rotates with the forward rotation of the seat back 2, the stopper structure 40 does not stop the front link 5 from rotating halfway and stops the rotation of the front link 5. The position is allowed up to the large-turned position (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.

  Next, the operation structure of the above-described walk-in lever 6 and 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, the stopper member 41 on each side connected to the second release cable 9 is rotated in the clockwise direction in the figure, and the release link 30 on each side is rotated in the counterclockwise direction in the figure. Operated. 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.

  As a result, as shown in FIG. 9, the vehicle seat 1 is configured such that the stopper member 41 and the release link 30 are retracted and the reclining device 10 is released from the rotationally stopped state by a single operation of the tilt down lever 7. Are performed together, and are smallly folded 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 base frame 4 to restrict the rotation of the front link 5, so that the stopper structure 40 is configured in a small size and arranged in an attractive manner. can do.

  Further, since the stopper structure 40 is provided at the connecting portion between the base frame 4 (fixed body) fixedly installed on the floor F and the front link 5 (movable body), the front link 5 and the seat cushion 3 are connected to each other. Compared to the configuration provided in the connecting portion between the movable bodies such as the connecting portion, the variation in the stopper position (intermediate stopping position) caused by the dimensional error of each portion can be suppressed small.

  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.

  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 part 3 Seat cushion 3F Cushion frame 3D Boomerang link 3M Link bracket 3N Lever bracket 3P Axis 3S Torsion spring 3T Axis 4 Base frame (base body)
4B Spring hook 4C Locking plate (locking part)
4D long hole 5 Front link (rising link)
5A support shaft 5B support shaft 5P engagement pin 6 walk-in lever 6A handle 6B first arm 6C second arm 7 tilt down lever 7A handle 7B third arm 7C hooking portion 8 first release cable 9 second release cable 10 reclining Device 10R Rotation center 11 Operation arm 20 Slider device 21 Upper rail 22 Lower rail 22A Spring hook portion 23 Lock mechanism portion 24 Release lever 25 Third release cable 26 Tension spring 30 Release link 31 Support shaft 32 Engagement pin 40 Stopper structure 41 Stopper member 41A Support shaft 41B Stopper surface 41C Corner portion 41S Torsion spring 42 Engaging member 42A Support shaft 42B Corner portion 42C Hanging portion 42S Torsion spring F Floor

Claims (4)

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 on a base body fixedly installed on the floor so as to be rotatable up and down. In conjunction with the forward tilting rotation of the seat back, the tilting link is collapsed and rotated while sinking downward,
A stopper structure capable of locking the rotational movement of the raising / lowering link with respect to the base body at the link connecting portion between the raising / lowering link and the base body and stopping the forward 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 vehicle seat according to claim 1, wherein the stopper structure is provided with a holding structure capable of holding the stopper structure at each position switched between a state in which the stopper structure functions as a stopper and a state in which the stopper structure does not function . 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 on a base body fixedly installed on the floor so as to be rotatable up and down. In conjunction with the forward tilting rotation of the seat back, the tilting link is collapsed and rotated while sinking downward,
A stopper structure capable of locking the rotational movement of the raising / lowering link with respect to the base body at the link connecting portion between the raising / lowering link and the base body and stopping the forward 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 is normally held in a state of functioning as a stopper, and is switched to a state in which the stopper function is not performed. A vehicle seat characterized in that it is switched to a state in which it is moved and functions as a stopper . The vehicle seat according to claim 1 or 2,
The seat back is connected to the base body via a reclining device that functions as a rotation shaft device that can be rotationally held. The base body is slidable in the vehicle front-rear direction with respect to the floor, and is always a slide lock. The reclining device is released from the rotationally held state 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 forward tilt rotation of the back is stopped halfway at the forward tilt position, 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. Rotation of the reclining device by operation of a tilt down lever provided on Said stopper structure with state is released is incorporated tilted to the folded down position as the seat back is folded on the upper surface portion together with the seat cushion is a state in which no stopper function sinks large downward The vehicle seat characterized by the above-mentioned. The vehicle seat according to any one of claims 1 to 3,
The stopper structure is held in a rotational posture in which a stopper member provided rotatably connected to the base body is normally in contact with a locking portion provided on the base body by biasing. A structure in which the tilting rotation of the tilting link is stopped halfway by the engagement pin provided on the tilting link coming into contact with the stopper member held in posture by this contact by the tilting rotation of the tilting link. The stopper member is engaged with an engagement member provided on the base body by being rotated in a direction to be removed from contact with the locking portion, and the retracted position state in which the rotation is operated. The tilting rotation of the rising link is allowed without stopping halfway, and the engaging member is pushed and moved by the large tilting rotation beyond the halfway stopping position of the rising link. The stopper member is released while maintaining the posture of the vehicle seat in which the stopper member is characterized in that is returned to the locking portion abutting stopper function can rotate posture by biasing.

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