JP2007223499A - Vehicle seat structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat structure capable of enhancing the operability of an operation lever to be used for unlocking and sliding a seat. <P>SOLUTION: A handle 61a of an operation lever 6 can be rocked by the predetermined angle ϕ to the front side from a position behind the axis 63 around the rocking axis 63 extending in the longitudinal direction of an end 12a on a seatback side. By rocking the operation lever 61 forward, the turn lock by a knuckle 30 is released, and the slide rock by a slide mechanism 20 is released via cable members 71, 72 to realize the occupant elevating/lowering state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat structure, and belongs to the technical field of vehicle interior structure.

  Conventionally, there is a type of vehicle in which seats are arranged in three rows on the front and rear sides. In such a vehicle, the opening for raising and lowering the vehicle body is often provided on the side of the first and second row seats. In this case, the third row seat as the last row is the second row seat. It will be arranged behind the side elevation opening. However, in the case of such an arrangement, there is a problem that the boarding / alighting property to the rear third row sheet is deteriorated.

  As a sheet structure that can cope with such a problem, there is, for example, one described in Patent Document 1. This seat structure is for a seat corresponding to the seat in the second row, and is slidable with respect to the vehicle compartment floor surface integrally with the seat cushion, which is slidable in the vehicle longitudinal direction. A seat back provided and pivotable between a standing state and a forwardly tilted state around the lower part, a rotation locking mechanism for locking the seat back in the standing state, the seat cushion, and the seat back A lock mechanism that locks the vehicle at a predetermined rear position, an operation lever provided at a side end of the seat back near the vehicle body side wall opening, and a lock by the rotation lock mechanism and the slide lock mechanism by operating the operation lever. And a lock release mechanism that forms a state in which the occupant can move up and down.

  In that case, in the thing of patent document 1, the said operation lever is provided so that rocking | fluctuation centering | focusing on the rocking | fluctuation axial center extended in a vehicle width direction is carried out, and the front-back direction is substantially in the standing state of the seat back. The lock release mechanism is configured to release the lock when the operation lever is swung forward. According to such a configuration, the operation lever can be easily operated from outside the vehicle when getting on and off the seat behind the seat. Further, the seat back of the front seat can be tilted forward and the seat can be slid only by swinging the operation lever.

JP 2004-284482 A

  However, in the configuration described in Patent Document 1, the pivot axis of the lever extends in the vehicle width direction. When the handle of the bar-shaped lever extending vertically is swung forward, the handle is moved in the vehicle longitudinal direction. Will be extended. Therefore, in order to slide the seat forward, the lever must be gripped with a large gripping force so that the hand does not slip out, which is a heavy burden on the passenger.

  Therefore, an object of the present invention is to provide a seat structure capable of improving the operability of an operation lever used for unlocking and sliding a seat.

  In order to solve the above-described problems, the present invention is configured as follows.

First, the invention according to claim 1 of the present application is provided with a seat cushion that is slidable in the vehicle front-rear direction with respect to the passenger compartment floor surface, and is slidable with respect to the passenger compartment floor surface integrally with the seat cushion. A seat back that is pivotable between a standing state and a forward-turned state with the lower part as a center, a rotation locking mechanism that locks the seat back in the standing state, and the seat cushion and the seat back. A slide lock mechanism that locks the vehicle at a predetermined rear position, an operation lever provided at a side end portion of the seat back near the vehicle body side wall opening, and release of the rotation lock by the rotation lock mechanism by operating the operation lever. The vehicle seat structure is provided with a lock mechanism operating means for releasing the slide lock by the slide lock mechanism and forming an occupant liftable state. Te,
The handle of the operation lever is capable of swinging a predetermined angle from the rear position of the shaft center to the front side around a swing shaft center extending in the longitudinal direction of the seat back side end portion,
The lock mechanism operating means is actuated by swinging the operating lever forward.

  The standing state includes a reclined state within a predetermined rotation range.

  Next, according to a second aspect of the present invention, in the vehicle seat structure according to the first aspect, the handle of the operation lever has a shape extending in the longitudinal direction of the end portion on the seat back side. And

  According to a third aspect of the present invention, in the vehicle seat structure according to the first or second aspect, after the lock mechanism operating means is actuated by swinging the operating lever forward, the seat cushion and When the seat back is slid forward, the lock mechanism operation means is locked regardless of the swinging of the operation lever to the rear side until the seat cushion and the seat back are returned to the predetermined rear position. It is characterized in that the state in which is released is maintained.

  According to a fourth aspect of the present invention, in the vehicle seat structure according to any one of the first to third aspects, the seat cushion is movable up and down. The seat back is moved from the upper position to the lower position in conjunction with the forward operation for rotating the seat back from the standing state to the forward position, and is moved upward from the lower position in conjunction with the standing operation for rotating from the forward position to the standing state. An interlocking mechanism for moving to a position is provided.

  Next, the effect of the present invention will be described.

  First, according to the first aspect of the present invention, the seat back is locked in the standing state by the rotation lock mechanism, and the seat back and the seat cushion (hereinafter, the seat back and the seat cushion are appropriately combined together). When the seat is locked at a predetermined rear position, the control lever is simply swung to the front, which is the direction in which the seat is to be moved. Release and release of the slide lock by the slide lock mechanism are performed, and an occupant liftable state is formed. Then, by continuously applying a force to the front side, it becomes possible to slide the seat forward and to tilt the seat back forward. For example, if an urging means for urging the seat back forward is provided, the seat back can be naturally tilted forward when the rotation lock is released by the operation of the lock mechanism operation means. The seat may be slid forward using the momentum.

  In this case, in the present invention, the handle of the operation lever is different from that of the background art in that the center of the swing axis extending in the longitudinal direction of the end portion on the seat back side is the front side from the position behind the axis. Is configured to be swingable by a predetermined angle. In this way, even if the handle of the operating lever is shaped like a rod extending in the radial direction from the shaft center as in the background art, for example, when the lever handle is swung forward, for example, as a predetermined angle By setting the angle at which the handle lever extending direction is substantially perpendicular to the sliding direction, the force applied to the front side when the seat is slid forward can be effectively received by the lever. . Therefore, even if the lever is not gripped with a large gripping force so as not to slip out, it is only necessary to push the rear surface of the handle forward, and the operability is improved. In the present invention, the release of the slide lock and the rotation lock by the lock mechanism operation means is performed simultaneously by the swing of the operation lever, and either one operates first and the other operates later. And the case where it is performed with a time lag.

  According to the invention described in claim 2, since the handle of the operating lever has a shape extending in the extending direction of the swing axis, the longitudinal direction of the handle is maintained even if the lever is swung. As a result, it is easy to stably apply a force for swinging the lever forward.

  By the way, the lock is released by swinging the operation lever forward, and when the seat is slid forward, the seat is then slid rearward. In this case, if the unlocked state is maintained only when the operating lever is swung forward, when the seat is slid backward by grasping the operating lever, for example, The operating lever also swings rearward and the slide lock mechanism is locked. That is, an unnatural operation of sliding the seat backward must be performed while maintaining the state of swinging forward, and operability is sacrificed.

  On the other hand, when the seat cushion and the seat back are slid forward after the lock mechanism operating means is actuated by swinging the operation lever to the front side, until the seat cushion and the seat back are returned to a predetermined rear position, In the case where the state of swinging to the front side is maintained, and when it is configured to swing back automatically when returning to this position, it may be considered that the operator feels uncomfortable.

  However, according to the third aspect of the present invention, when the seat cushion and the seat back are slid forward after the lock mechanism operating means is actuated by the forward swing of the operation lever, these are the predetermined rearward positions. Until the position is returned to the position, the unlocked state is maintained regardless of the swinging of the operation lever to the rear. Therefore, when the operation lever is grasped and the seat is slid backward, the slide lock mechanism is prevented from being locked even if the operation lever swings backward. In addition, it is possible to set the swing angle at which the lever can be easily operated while the seat is slid rearward, and the operability when the seat is slid rearward is improved.

  In addition, if the operating lever is gripped and the seat back is slid backward, the operating lever naturally swings backward, so that when the seat returns to the predetermined rear position, the operating lever suddenly swings backward. Moving is avoided. That is, the operator does not feel uncomfortable.

  According to the fourth aspect of the present invention, when the seat back is tilted forward, the seat cushion moves in conjunction with the seat back.

  Hereinafter, a vehicle seat structure according to an embodiment of the present invention will be described.

  As shown in FIG. 1, in the vehicle 1 according to the present embodiment, three rows of occupant seats 3, 4, and 5 are arranged on the passenger compartment floor 2 in the front-rear direction, and the first and second rows Car body elevating openings 6 and 7 are provided on the side of the eye seat. The third row of seats 5 in the last row is disposed behind the lifting opening 7 on the side of the second row of seats 4.

  The second row of seats 4 (hereinafter referred to as intermediate seats 4) are supported on the floor 2 via a slide mechanism 20 so as to be slidable in the vehicle front-rear direction.

  As shown in FIG. 2, the slide mechanism 20 includes a lower rail 21 fixed in a groove 2 a provided in the floor 2 extending in the vehicle front-rear direction, and an upper slidable in the vehicle front-rear direction with respect to the lower rail 21. Rail 22.

  The intermediate seat 4 includes a seat cushion 11 and a seat back 12, and a base frame 13 that forms the base of the seat 4 has a front bracket 14 and a rear bracket 15 on the upper surfaces of the front and rear portions of the upper rail 21. It is fixed through.

  The lower end portion of the seat back frame 16 of the seat back 12 is connected to the upper extending portion 13a of the rear portion of the base frame 13 by the support shaft 17 extending in the vehicle width direction, and thereby pivots about the support shaft 17 Supported as possible. The seat back 12 is urged by a forward urging means (not shown) in the forward direction.

  A front end portion of the seat cushion 11 (seat cushion frame 18) is connected to the front bracket 14 via a link member 19. Further, the front end (lower end) side of the connecting member 29 that is substantially V-shaped in side view is coupled to the rear end portion of the seat cushion frame 18 by a plurality of pins and the like, and the rear end (upper end) side is a lower portion of the seat back frame 16. Are connected by a connecting pin 40 above the support shaft 17. Accordingly, when the seat back 12 is tilted forward, the position of the connecting pin 40 rotates around the support shaft 17, that is, moves downward while moving forward of the vehicle. At this time, this movement is transmitted to the seat cushion frame 18 via the connecting member 29, so that the link member 19 rotates about the fulcrum on the front bracket 14 side. As a result, the seat cushion 11 However, it moves from the upper position shown in FIG. 2 to the lower position shown in FIG.

  As shown in FIG. 4, the base frame 13 and the seat back frame 16 are spaced apart in the vehicle width direction. A knuckle 30 that holds the seat back 12 in an upright state is provided between the base frame 13 and the seat back frame 16 on the support shaft 17. Here, the knuckle 30 constitutes a part of the support shaft 17 and is capable of being rotationally locked in a state where the seat back 12 is reclined rearward from the state of FIG. In the present embodiment, it is possible to lock within a range of, for example, about 20 degrees in the backward tilt direction from the state of FIG. 2, and the standing state in the present invention includes a state locked within this range. It is a waste.

  As shown in FIGS. 4 and 5, the knuckle 30 includes a ring member 31 fixed to the seat back frame 16, a pair of lock members 32 and 32 disposed inside the ring member 31, and the lock member. And a knuckle lever 34 that rotates the cam member 33 around a rotation axis (axis of the support shaft 17).

  As shown in FIG. 5, a pair of internal teeth 31 a and 31 a are formed on the inner peripheral surface 31 b of the ring member 31 so as to face each other across the rotation axis. The diameters of the inner teeth 31a and 31a around the rotation axis to the tooth tip surface are larger than the diameter of the inner peripheral surface 31b where no inner teeth are formed.

  The pair of lock members 32 and 32 are provided at positions facing each other across the rotation axis, and can be engaged with the inner teeth 31 a and 31 a of the ring member 31 on the surface facing the ring member 31. Lock teeth 32a and 32a are formed. Both the lock members 32, 32 are supported by the base frame 13 so as to be movable in the radial direction of the ring member 31, and are urged by an urging means such as a spring (not shown) toward the rotation axis.

  The cam member 33 is disposed in a state of being sandwiched between a pair of lock members 32, 32, and is provided so as to be rotatable about the rotation axis. The cam member 33 has a pair of engaging surfaces 33a and 33a opposed to each other with the rotation axis interposed therebetween, and a pair of release surfaces 33b and 33b which are also opposed to each other with the axis interposed therebetween in the circumferential direction. Is formed. The pair of release surfaces 33b and 33b is shorter in distance from the rotation axis than the engagement surfaces 33a and 33a.

  The knuckle lever 34 is coupled to the cam member 33 via a connecting pin 17 a provided on the same axis as the pivot pin 17 and rotatable relative to the pin 17. The knuckle lever 34 is urged clockwise in FIG. 5 by urging means 35 such as a spring. The urging force of the urging means 35 is larger than the urging force that urges the lock members 32 and 32 toward the rotational axis. At the tip of the knuckle lever 34, a cable member 71 reaching an operation member 60 to be described later and an operation string 91 for forward operation of the seat back 12 are connected.

  According to such a knuckle 30, when the knuckle lever 34 is at the angular position shown in FIG. 5, the pair of engaging surfaces 33 a and 33 a of the cam member 33 abut against the inner surfaces 32 b of both the locking members 32 and 32. The two lock members 32, 32 are in contact with each other and moved to the outside against the urging force of the urging means to be engaged with the internal teeth 31a, 31a. That is, the seat back 12 is locked so as not to rotate against the urging force of the forward urging means.

  On the other hand, the cable member 71 or the forward operation string 91 is pulled upward, and the knuckle lever 34 rotates in the direction of the arrow A, and the angular position shown in FIG. 6 (the knuckle lever 34 rotates most counterclockwise). When the position of the cam member 33 is at a position and is controlled by a restricting means (not shown) so as not to rotate counterclockwise as compared with the state shown in FIG. 6, both release surfaces 33b of the cam member 33 are shown in FIG. , 33b abuts on the inner surfaces 32b, 32b of the lock members 32, 32, and both the lock members 32, 32 are moved inward by the urging means to engage with the inner teeth 31a, 31a of the ring member 31. The combination is released. Here, the diameter x from the rotation center to the lock teeth 32a and 32a of the lock members 32 and 32 at this time is configured to be smaller than the diameter y from the rotation center to the inner peripheral surface 31b of the ring member 31. Has been. Therefore, the seat back 12 can turn freely and can be in a reclining state or a forward-turned state.

  In this state, after the seat back 12 is tilted forward and the ring member 31 is rotated counterclockwise to the state shown in FIG. 7, for example, when the pulling of the cable member 71 is stopped, the knuckle lever 34 is moved. By being urged clockwise by the urging means 35, the cam member 33 rotates clockwise as indicated by an arrow A from the state shown in FIG. 6, and the lock teeth 32a, 32a of the lock member 32 are ring members. 31 abuts on the inner peripheral surface 31b of the ring member 31 and does not engage with the inner teeth 31a, 31a of the ring member 31. At this time, the lock teeth 32a, 32a and the inner peripheral surface 31b are in contact with each other, but are slidable. Therefore, the seat back 12 can be rotated around the rotation axis.

  Next, the slide mechanism 20 will be described in detail with reference to FIGS.

  First, as shown in FIG. 9, the lower rail 21 of the slide mechanism 20 has a substantially U-shaped cross-sectional shape, and includes a bottom wall portion 21a and an outer wall portion 21b that rises above both edges of the bottom wall portion 21a. , 21b, upper wall portions 21c, 21c extending substantially horizontally from the upper edges of the outer wall portions 21b, 21b, and inner wall portions 21d, 21d suspended from the inner edges of the upper wall portions 21c, 21c. It is configured. Further, as shown in FIG. 8, a large number of rectangular lock holes 21e... 21e are formed at predetermined intervals on the inner side wall portions 21d and 21d on the vehicle outer side.

  On the other hand, the upper rail 22 has a substantially inverted U-shaped cross-section, and includes an upper wall portion 22a, inner wall portions 22b and 22b suspended from both edges of the upper wall portion 22a, and inner wall portions 22b and 22b. The outer wall portions 22d and 22d rise from the outer edge of the outer wall portion 22 and the protruding wall portions 22e and 22e extend substantially horizontally from the upper edge of the outer wall portion 22 to the outer side.

  Further, a retainer 29 is mounted on the bottom wall portion 21a of the lower rail 21 so as to hold the balls 29a ... 29a in a freely rolling manner. The retainer 29 has a substantially inverted U-shaped cross-sectional shape, and notches are formed at predetermined intervals on both sides thereof, and both edges of the bottom wall portion 21a of the lower rail 21 are formed in the notches. , 29a, which are in contact with the lower portions of the outer wall portions 22d, 22d of the upper rail 22 and smoothly slide the upper rail 22 with respect to the lower rail 21, are accommodated.

  The outer wall portion 21 b of the lower rail 21 is located outside the outer wall portion 22 d of the upper rail 22, and the upper wall portion 21 c of the lower rail 21 is located above the protruding wall portion 22 e of the upper rail 22, and the inner wall portion of the lower rail 21 21 d is located between the inner wall portion 22 b and the outer wall portion 22 d of the upper rail 22.

  A rectangular lock member insertion hole 22f into which the lock member 24 is inserted is formed at a substantially central portion in the longitudinal direction of the upper wall portion 22a of the upper rail 22, and as shown in FIG. A plurality of rectangular lock holes 22g... 22g, 22h... 22h are formed in the inner wall portion 22b and the outer wall portion 22d on the side at positions corresponding to the lock member insertion holes 22f of the upper wall 22a.

  A cylindrical support shaft 23 extending substantially in the vehicle front-rear direction is fixed to a fixed portion (not shown) of the upper rail 22 above the inner wall portion 22b, and a lock member 24 is swingable on the support shaft 23. The locking member 24 is always urged counterclockwise in the drawing by a leaf spring 25 attached to the outer peripheral surface thereof.

  The lock member 24 has a curved cross section, and at one end (lower end) thereof, as shown in FIGS. 9 and 10, the lock holes 21e... 21e of the lower rail 21 and the lock holes 22g. ... a plurality of comb-like locking claws 24a ... 24a, which are inserted into 22h to lock the upper rail 22 to the lower rail 21, are formed in a tapered shape. Further, an engaging portion 24b for engaging with an operation member described later is formed on the other end (upper end) of the lock member 24 so as to protrude inward. An arcuate sliding portion 24c for attachment to the support shaft 23 is formed on the inner side of the engaging portion 24b, and the inner diameter of the sliding portion 24c is set substantially equal to the outer diameter of the support shaft 23. ing. Further, a rectangular hole 24d into which one end (upper end) of the leaf spring 25 is loosely inserted is formed in a part of the sliding portion 24c and in the vicinity thereof.

  The leaf spring 25 is also formed in a curved shape like the lock member 24, and the one end and the other end of the leaf spring 25 are in contact with the inner wall portion 22b of the upper rail 22 and the base end portion of the lock claw 24a of the lock member 24, respectively. Contact portions 25a and 25b are formed. Similarly to the lock member 24, a part of the leaf spring 25 is formed in an arc shape, and the leaf spring 25 is attached to the lock member 24 so that the arc shape portion covers the arc-shaped sliding portion 24 c of the lock member 24. It is attached.

  As shown in FIG. 8, a bracket 26 is attached to the upper surface of the upper wall portion 22a of the upper rail 22, and a pipe-shaped operation member 27 bent into a U shape is indicated by an arrow C on the bracket 26. It is supported so that it can swing. The operation member 27 has a front end (left end in the drawing) biased downward by a biasing means (not shown). A pressing member 28 is attached to the rear end portion of the operation member 27. The pressing member 28 is located above the engaging portion 24b of the lock member 24, and moves up and down by a swinging operation of the front end portion of the operating member 27 by the occupant, and can be engaged with the engaging portion 24b. ing.

  According to the slide mechanism 20, when the front end portion of the operation member 27 is not lifted upward, the lock member 24 is urged by the leaf spring 25, and the lock claws 24 a... 24 a are locked to the lock holes 21 e of the lower rail 21. 21e and the upper rail 22 are held in a state of being fitted into the lock holes 22g. Therefore, the upper rail 22 is securely locked to the lower rail 21, and the intermediate seat 4 attached to the upper rail 22 is held at a predetermined position.

  On the other hand, when the intermediate sheet 4 is slid, when the front end portion of the operation member 27 is lifted, the engaging portion 24b of the lock member 24 is resisted against the urging force of the leaf spring 25 by the pressing member 28 as shown in FIG. When pressed, the lock member 24 rotates in the counter-lock direction (counterclockwise direction) as indicated by arrow D with the support shaft 23 as the center of rotation (swing). Therefore, the lock claw 24a of the lock member 24 is disengaged from the lock holes 21e ... 21e of the lower rail 21 and the lock holes 22h ... 22h of the upper rail 22, so that the lock of the upper rail 22 with respect to the lower rail 21 is released.

  Thereafter, when a load is applied in the front-rear direction of the intermediate seat 4, the upper rail 22 slides in the front-rear direction on the lower rail 21. Therefore, when the hand is released from the operation member 27 at a desired position, the rear end portion of the operation member 27 Rises. As a result, the locking member 24 is rotated in the locking direction by the urging force of the leaf spring 25, and the locking claw 24a is reinserted into the locking holes 21e of the lower rail 21 and the locking holes 22g and 22h of the upper rail 22 as indicated by phantom lines. The upper rail 22 is locked with respect to the lower rail 21, and the seat 4 is held in that position.

  Here, in the vehicle 1 according to the present embodiment, as shown in FIG. 1, when getting on and off the rear seat 5 behind the intermediate seat 4, the intermediate seat 4 can be slid forward by one operation, A walk-in mechanism that allows the seat back 12 to be moved forward and forms a state in which the occupant can move up and down is provided.

  As shown in FIGS. 1 and 2, the walk-in mechanism includes an operation portion 60 provided at a side end portion 12a of the vehicle body side wall of the seat back 12 near the occupant opening 7, and the operation portion 60 and the slide mechanism. 20 and cable members 71 and 72 (see FIG. 14) for connecting the knuckle 30 to each other.

  As shown in FIGS. 12 and 13, the operation unit 60 includes a bezel 62 attached to a recess provided from the side end portion 12 a on the outer side in the vehicle width direction of the seat back 12 to the back surface portion 12 b, and the bezel 62. And an operation lever 61 supported to be swingable.

  The operation lever 61 includes a side wall portion 61a having a surface substantially parallel to the side end portion 12a of the seat back 12, and a substantially fan-shaped bag in plan view extending inward in the vehicle width direction from the upper end and the lower end of the side wall portion 61a. It has a portion 61b, 61b, and is provided so as to be able to swing a predetermined angle φ around a swing shaft 63 extending in the longitudinal direction of the side end portion 12b of the seat back 12. A bulging portion 61d that extends substantially parallel to the swing shaft 63 and bulges inward of the vehicle is formed at the rear portion of the side wall portion 61a. The bulging portion 61d is a handle portion (note that it is of course possible to grip a portion of the side wall portion 61a in front of the bulging portion 61d), and a finger joint when gripping the side wall portion 61a. When it is not rocked to the front side, it is located behind the rocking shaft 63 (hereinafter referred to as “rear position” as appropriate) and rocked by a predetermined angle φ to the front side. In some cases, it is positioned to the side of the swing shaft 63 (hereinafter referred to as “front position” as appropriate). As a result, when the lever 61 is swung to the front side, it can be swung easily to the front side by simply pushing the finger to the side wall portion 61a from the back as shown in the figure and pushing it to the front side. The state where the finger is hooked can be maintained. Therefore, when the intermediate sheet 4 is slid forward by gripping the lever 61, the sliding operation can be performed while maintaining the gripping state when the lever is swung from the rear position to the front position. A good gripping state can be maintained without gripping 61 with a large force.

  The bezel 62 includes a side wall portion 62a substantially parallel to the side end portion 12a of the seat back 12, a front wall portion 62b extending outward from the front end of the side wall portion 62a in the vehicle width direction, and both the wall portions 62a and 62b. And a substantially horizontal upper wall part 62c (not shown in the drawing) and a lower wall part 62d. An engagement portion 62e that engages with the rear end portion 16c of the seat back frame 16 is provided on the inner surface in the vehicle width direction at the rear portion of the side wall portion 62a. Further, the front wall portion 62b is in contact with the vertical surface portion 16d extending outward in the vehicle width direction of the seat back frame 16. The upper and lower portions of the side wall portion 62a and the seat back frame 16 are provided with holes 62f and 16e through which the inwardly extending portions 61c extending in the direction opposite to the flange portions 61b and 61b of the operation lever 61 are inserted. Yes. One ends of the cable members 71 and 72 are coupled to the tip of the inward extending portion 61e.

  The other end of the cable member 71 extends to the knuckle 30 and is coupled to the tip of the knuckle lever 34 as shown in FIG. The other cable member 72 extends to the slide mechanism 20 and is coupled to the engaging portion 24b of the lock member 24 (see FIGS. 8 and 9). A movable pin 81 is attached in the middle of the other cable member 72.

  As shown in FIGS. 4 and 15, the movable pin 81 is inserted into a long hole 13 b provided in the upward extending portion 13 a of the base frame 13, and has large diameter portions 81 a and 81 b for preventing falling off. Have.

  Further, a stopper 82 is fixed to a surface on the base frame 13 side at the lower end of the seat back frame 16 so as to protrude from the surface. The distance from the rotation axis of the stopper 82 is substantially equal to the distance from the movable pin 81 to the rotation axis when the movable pin 81 moves to the upper position in the long hole 13b. Further, the stopper 82 is provided when the seat back 12 is tilted forward by a predetermined angle θ around the support shaft 17 with respect to the vertical direction as shown in FIG. 15 with the movable pin 81 positioned above the long hole 13b. Further, as shown in FIGS. 16 and 17, it is provided at a position where it abuts on the movable pin 81, whereby it is possible to prevent the seat back 12 from being further forwarded.

  The cable member 71 is supported by the seat back frame 16 inside the seat back 12 and led to the knuckle 30. Then, the operation lever 61 is in the rear position (indicated by a solid line in FIG. 13), and the inner teeth 31a, 31a of the ring member 31 of the knuckle 30 and the lock teeth 32a, 32a of the lock member 32 engage with each other. When 12 is locked in the standing state, as shown in FIG.

  The cable member 72 is guided to the movable pin 81 inside the seat back 4, extends further downward from the movable pin 81, exits from the lower end of the seat back 4 to the external space, and is shown in FIGS. As shown in FIG. 5, it extends to the inside of the groove 2 a of the floor 2, rises upward in the lower side of the lock member 24 of the slide mechanism 20, and is coupled to the engaging portion 24 b.

  In that case, the cable member 72 extends to the portion after exiting from the lower end of the seat back 4 to the external space, that is, into the groove 2 a of the floor 2, and below the side of the lock member 24 of the slide mechanism 20. A part of the portion that rises upward and is coupled to the engaging portion 24b is a pipe member 74 supported by brackets 73, 73 fixed to the base frame 13, as shown in FIGS. Is inserted. That is, the cable member 72 is supported on the intermediate seat 4 side, and moves integrally with the seat 4 when the seat 4 slides in the vehicle front-rear direction. The inner diameter of the pipe member 74 is sufficiently larger than the outer diameter of the cable member 72 so that almost no sliding resistance occurs between them. On the other hand, a part of the cable member 72 from the operation lever 61 to the movable pin 81 is covered with a covering member 75 that generates a sliding resistance force described later between the cable member 72 and the cable member 72. The covering member 75 is fixed to the seat back frame 16.

  Here, the sliding resistance force between the covering member 75 and the cable member 72 is made larger than the urging force of the leaf spring 25 of the slide mechanism 20. Accordingly, as shown in FIG. 18, when the operation lever 61 is swung forward and the cable member 72 is pulled, the cable member is not moved even if the operation lever 61 is swung backward as shown in FIG. 72 cannot slide with respect to the covering member 75, and as a result, a portion of the cable member 72 between the operation lever 61 and the covering member 72b is loosened. That is, the swing operation of the operation lever 61 is not transmitted to the slide mechanism 20. Therefore, when the slide lock mechanism 20 is in the locked state as shown in FIG. 14, the operation lever 61 is swung forward, and the lock member 24 of the slide lock mechanism 20 is unlocked as shown in FIGS. Once the locked state is released, the portion of the cable member 72 between the operation lever 61 and the covering member 75 is loosened even when the operation lever 61 is swung backward as shown in FIG. As a result, the state in which the slide lock is released continues.

  As shown in FIGS. 8 and 9, the forcible lock member 83 for forcibly releasing the slide lock release state to the lock state is provided below the engaging portion 24 b of the lock member 24 and the lower rail 21. The outer wall 21b is provided on the outer surface. The lock member 83 includes an attachment surface portion 83a fixed to the outer wall portion 21b of the lower rail 21, a first horizontal surface portion 83b extending substantially horizontally outward from the upper end of the attachment surface portion 83a in the vehicle width direction, and the first horizontal An inclined surface portion 83c extending rearward and upward from the rear end of the surface portion 83b, and a second horizontal surface portion 83d extending substantially horizontally rearward from the rear end of the inclined surface portion 83c. The height of the first horizontal plane portion 83b is the height of the engaging portion 24b when the locking member 24 is rotated in the anti-locking direction, that is, when the engaging portion 24b is in the lower position when the locking member 24 is in the unlocked state. The height is lower than this. Further, the height of the second horizontal surface portion 83d is such that the lock member 24 is in a locked state (the lock member 24 is in FIGS. 8 and 9) when the inclined surface portion 83c and the engagement portion 24b of the lock member 24 are not engaged. In the locked position shown in FIG. 2), the height of the engaging portion 24b is slightly higher.

  On the other hand, the inclined surface portion 83c has the five long hole-like lock holes 21e ′... 21e ′ on the rear side of the lower rail 21 in the state where the engaging portion 24b of the lock member 24 is in the lower position (see FIG. 21). When it slides backward to the vicinity of the front end portion of the, it is provided at a position that comes into contact with the substantially intermediate height position of the inclined surface portion 83c. Further, the rear end position and the rear end height of the inclined surface portion 83c are such that after the lock member 24 moves further rearward and the lock claws 24a... 24a begin to fit into the lock holes 21e '. 21e ′... 21e ′ until it comes into contact with the rear end, the lock member 24 is further rotated and the lock claws 24a... 24a are inserted into the lock holes 22h. Is set so that the engaging portion 24b can be pushed up as much as possible. Here, the vehicle front-rear direction position of the intermediate seat 4 when contacting the rear end is the rear reference position of the seat 4.

  The forced lock member 83 is formed using an elastic material that can constitute a leaf spring. When the locked state is released by the operation of the operation member 27, the engaging portion 24b of the lock member 24 is pressed by the pressing member 28. When pressed from above, the engaging portion 24b is not obstructed from attempting to rotate in the anti-lock direction. Specifically, the upward urging force of the forced lock member 83 is set to a magnitude that does not require an excessively large operation force when operating the operation member 27, and the upward urging force of the forced lock member 83. Is larger than the sliding resistance force between the cable member 72 and the covering member 75.

  Next, the operation and action of the present sheet configured as described above will be described.

  First, FIG. 14 will be described. In FIG. 14, as described above, the operation lever 61 is not operated, the intermediate seat 4 is locked with the seat back 12 standing up at the rear reference position, and the intermediate seat 4. In this state, the knuckle 30 is in a locked state, and the lock member 24 of the slide mechanism 20 is fitted into the lock holes 21e, 22g, 22h of the rails 21, 22. Yes.

  Next, when the operation lever 61 is swung to the front position (the state of the imaginary line in FIG. 13) to get into the rear seat 5, as shown in FIG. 18, the cable members 71 and 72 are moved in the directions indicated by the arrows. 6, the knuckle lever 34 of the knuckle 30 rotates, that is, the cam member 33 rotates, so that the inner teeth 31a and 31a of the ring member 31 and the lock teeth 32a of the lock members 32 and 32 are rotated. , 32a is released. In the state where the operation lever 61 is swung to the front position, the diameter x from the rotation axis to the tips of the lock teeth 32 a and 32 a of the lock members 32 and 32 is from the rotation axis to the ring member 31. Since it is smaller than the diameter y to the inner peripheral surface 31b, the seat back 4 naturally rotates in the forward direction by the urging force of the forward urging means. Further, as shown in FIG. 18, since the movable pin 81 is pulled upward in the elongated hole 13b, the movable pin 81 and the stopper 82 are brought into contact with each other as shown in FIGS. The seat back 12 is further prevented from being moved forward. Further, as shown in FIG. 19, the engaging portions 24b of the locking members 24, 24 of the slide mechanism 20 are rotated in the anti-lock direction (counterclockwise in FIG. 19) when the cable 72 is pulled downward. Then, the engagement between the lock claws 24a ... 24a of the lock member 24 and the lock holes 21e ... 21e, 22h ... 22h of the rails 21, 22 is released, and the lock of the slide mechanism 20 is released.

  Then, the intermediate seat 4 is slid forward by applying a forward force while the operation lever 61 is swung to the front position. When the rotation lock by the knuckle 30 is released, the seat back 12 is naturally tilted forward by the urging force of the forward urging means, so that the intermediate seat 4 can be slid forward using the force. Thus, the force that the occupant should apply to slide forward is greatly reduced.

  Then, after getting into the rear seat 5, in order to slide the intermediate seat 4 rearward to the rear reference position, it grasps the operating lever 61 and pulls it rearward. Accordingly, the operation lever 61 swings to the rear position. At this time, in the knuckle 30, the lock teeth 32a, 32a of the lock members 32, 32 are provided on the inner periphery of the ring member 31, as shown in FIG. Since they are in contact with the surfaces 31b and 31b, the knuckle lever 34 can only return to the intermediate position shown by the solid line in FIG. Therefore, the cable member 71 is slackened. Further, as described above, since the sliding resistance force between the cable member 72 and the covering member 75 is larger than the urging force of the leaf spring 25 of the slide mechanism 20, the lock by the slide mechanism 20 is released. In this state, even when the operation lever 61 is returned to the rear position, the lock member 24 rotates in the locking direction only by the slack in the portion of the cable member 72 between the operation lever 61 and the covering member 75. There is nothing and the unlocked state continues. The movable pin 81 is maintained at the upper part of the long hole 13b, and the seat back 12 is held in a state where the seat back 12 is inclined forward by a predetermined angle θ.

  When the intermediate sheet 4 is slid rearward and moved to the vicinity of the rear reference position, the engaging portion 24b of the lock member 24 comes into contact with the inclined surface portion 83c of the forced lock member 83 as shown in FIG. Then, when the intermediate sheet 4 is continuously slid rearward, the engaging portion 24b of the locking member 24 starts to rotate in the locking direction by being pushed up by the inclined surface portion 83c of the forced locking member 83, and the locking member 24 is locked. The claws 24a... 24a start to be fitted into the lock holes 21e '. In this case, since the lock hole 21e 'of the lower rail 21 in the vicinity of the rear reference position is a long hole as described above, the intermediate seat 4 can be slid rearward even after the lock claws 24a ... 24a start to be fitted. Can do. Therefore, the engagement portion 24b of the lock member 24 can be further moved upward along the upper surface of the inclined surface portion 83c. As a result, the engagement portion 24b of the lock member 24 is further rotated in the lock direction, and the lock claw 24a Can be inserted into the lock hole 22h of the upper rail 22 to completely slide lock. At this time, when the cable member 72 is pulled toward the slide mechanism 20, as shown in FIG. 22, the portion of the cable member 72 between the operation lever 61 and the covering member 75 can be loosened.

  Next, when the seat back 12 is rotated backward, the ring member 31 of the knuckle 30 rotates together with the seat back frame 16 (seat back 12). The inner teeth 31a, 31a of the ring member 31 and the lock teeth 32a, 32a of the lock members 32, 32 are engaged when locked to the standing state (the state where the reclining amount is the smallest) and locked in the standing state. The Rukoto. At this time, when the knuckle lever 34 rotates in the locking direction, the cable member 71 is loosened, and the state shown in FIG. 14 is restored.

  On the other hand, as shown in FIG. 23, when the forward operation member 90 attached to one end of the operation string 91 is pulled instead of the operation lever 61, the knuckle lever 34 rotates in the anti-lock direction, as described above. Will be unlocked. At this time, rotation of other members such as the operation lever 61 is not caused.

  As described above, according to the present embodiment, the seat back 12 is locked in the standing state, and the seat back 12 and the seat cushion 11 are locked at the rear reference position (a predetermined rear position in the claims). In this state, the operation lever 61 is simply swung to the front, which is the direction in which the intermediate sheet 4 is to be moved. The cable members 71 and 72 release the rotation lock by the knuckle 30 and the slide lock by the slide mechanism 20. Release is performed. Then, by continuously applying a force to the front side, it becomes possible to slide the seat forward and to tilt the seat back forward. Further, since a forward biasing means for biasing the seat back 12 in the forward tilt direction is provided, the seat back 12 is naturally tilted forward when the rotation lock is released, and the momentum is utilized. The intermediate sheet 4 can be slid forward.

  In this case, in the present embodiment, the handle 61a of the operation lever 61 is different from that of the background art in that the swing shaft 63 (swing shaft center) extending in the longitudinal direction of the side end portion 12a of the seat back 12 is used. ), The force applied to the front side when the intermediate seat 4 is slid forward is operated. The lever 61 can be effectively received by the handle 61a. As a result, it is only necessary to push the rear surface of the handle 61a forward without having to grip the lever with a large gripping force so as not to pull out the lever. Will be improved.

  Further, since the handle 61a of the operating lever 61 has a shape extending in the extending direction of the swing shaft 63, the longitudinal direction of the handle 61a does not change even when the lever 61 is swung. It becomes easy to apply a force for swinging the lever 61 forward.

  Further, when the lock is released by the swinging operation of the operation lever 61 to the front side and the seat cushion 11 and the seat back 12 are slid forward, until these 11 and 12 are returned to the rear reference position, By the sliding resistance force (holding means) between the cable member 72 and the covering member 75, the unlocked state is held regardless of the swinging of the operation lever 61 to the rear side. Accordingly, when the intermediate lever 4 is slid backward by grasping the operation lever 61, the slide lock state is avoided even if the operation lever 61 swings rearward. Further, while the intermediate sheet 4 is slid rearward, the operation lever 61 can be set to a swing angle that allows easy operation, and the operability when the intermediate sheet 4 is slid rearward is improved. .

  Moreover, when the operation lever 61 is gripped and the seat back 12 is slid rearward, the operation lever 61 naturally swings to the rear side, so that the operation is suddenly performed when the intermediate seat 4 returns to the rear reference position. It is avoided that the lever 61 swings backward. That is, the operator does not feel uncomfortable.

  In the present embodiment, when the operation lever 61 is swung forward, the slide lock and the rotation lock are released at the same time. It is also applicable to the case where the operation is performed with a time lag such that the first operation is performed first and the other operation is performed later.

  In the present embodiment, the lock hole 21e in the vicinity of the rear reference position is the long hole 21e '. However, when the lock hole 22h of the outer wall portion 22d of the upper rail 22 need not be provided (for example, the upper rail 22 and the lower rail 21 are sufficiently high in rigidity and only the lock hole 22g of the inner wall portion 22b is required), the insertion amount (rotation amount) of the lock member 24 can be reduced. can do.

  In the present embodiment, the handle (61a) of the operation lever 61 is a plate-like handle. However, as shown in FIG. 24, a cylindrical shape extending in the longitudinal direction of the side end portion 12a of the seat back 12 is used. The handle 61a 'may be used. According to this, the handle 61a' can be grasped and held, so that the holding property with respect to the handle 61a 'is improved, and the operability is further improved. In this case, the front wall portion 62b 'of the bezel 62' is positioned forward compared to the above example so that the thumb in the gripped state does not hit when the lever 61 'is swung forward. Yes.

  In both the above examples, the handle of the operation lever extends in the extending direction of the swing shaft. However, in the present invention, the handle is predetermined from the rear to the front of the shaft centered on the swing shaft. For example, as shown in FIG. 25, from the rear of the shaft center 63 ″, the shaft center 63 ″ extends in the longitudinal direction of the side end portion 12a ″ of the seat back 12 ″. This includes the case of a swing lever 61 ″ having a rod-like handle that can swing at a predetermined angle (for example, about 90 °) on the front side. In this case as well, the force applied to the front side when sliding the seat forward is also included. As a result, the lever 61 ″ is effectively received, and as a result, for example, a force is transmitted to the lever 61 ″ simply by pushing the rear surface of the lever 61 ″ forward, and as a result, the lever 61 ″ is gripped with a large gripping force. Don't do It eliminates Suppo escape risk, so that the operability is improved.

  Moreover, in the said embodiment, although the vehicle with which the sheet | seat was provided in three rows back and forth was demonstrated, the opening part for boarding / alighting is not provided in the side of the sheet | seat of the 2nd row even if it is 2 rows, for example Applicable to vehicles and the like.

  The present invention can be widely applied to a vehicle seat structure.

1 is a schematic side view of a vehicle seat according to an embodiment of the present invention. It is an enlarged side view of the vehicle seat. FIG. 3 is a view corresponding to FIG. 2 in a state where the vehicle seat is moved forward. It is AA sectional drawing of FIG. It is a BB arrow line view (schematic diagram) of the knuckle in FIG. FIG. 6 is a view corresponding to FIG. 5 in a state where the knuckle lever is rotated upward. FIG. 6 is a view corresponding to FIG. 5 in a state where the seat back is slightly tilted forward from the standing state. It is an enlarged view of the slide mechanism part of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. FIG. 10 is a view corresponding to FIG. 9 in a state where the lock by the lock member is released. It is a perspective view from the back of the seat of an operation part. It is EE sectional drawing of FIG. It is operation | movement explanatory drawing of a lock release mechanism. FIG. 3 is a view corresponding to FIG. 2 in a state in which the seat back is tilted forward by a predetermined angle after a forward swing operation of the operation lever. FIG. 16 is an enlarged view of the vicinity of the lower end of the seat back in FIG. 15. It is FF sectional drawing of FIG. FIG. 15 is a view corresponding to FIG. 14 in a state where the operation lever is swung forward for unlocking. It is a figure equivalent to FIG. 9 in the state of FIG. FIG. 20 is a view corresponding to FIG. 14 in a state where the operation lever is swung backward after the state of FIG. 19. FIG. 21 is an enlarged view of the vicinity of the forcible lock member in a state where the seat is slid to the vicinity of the rear reference position while the seat back is tilted forward after the state of FIG. 20. FIG. 21 is a view corresponding to FIG. 14 in a state where the seat is returned to the rear reference position after the state of FIG. 20. FIG. 15 is a view corresponding to FIG. 14 in a state where the forward operation member 90 is pulled. It is a figure equivalent to FIG. 13 which shows the other example of an operation lever. It is a figure equivalent to FIG. 13 which shows the 2nd other example of an operation lever.

Explanation of symbols

1 Vehicle 4 Intermediate seat (seat)
11 Seat cushion 12 Seat back 19 Link member (member constituting the interlocking mechanism)
20 Slide mechanism (slide lock mechanism)
29 Connecting member (member constituting the interlocking mechanism)
30 knuckle (rotation lock mechanism)
61 Operation lever 61d bulge (handle)
63 Rotating shaft (member constituting the pivot axis of the operating lever)
71, 72 Cable member (lock mechanism operating means)
75 Covering member (lock mechanism operating means)

Claims (4)

A seat cushion that is slidable in the vehicle front-rear direction with respect to the passenger compartment floor surface, and is provided so as to be slidable with respect to the passenger compartment floor surface integrally with the seat cushion. A seat back that can be rotated between a tilted state, a rotation lock mechanism that locks the seat back in an upright state, a slide lock mechanism that locks the seat cushion and the seat back at a predetermined rear position, An operation lever provided at the side end of the seat back near the vehicle body side wall opening, and the operation lever is used to release the rotation lock by the rotation lock mechanism and the slide lock by the slide lock mechanism. And a vehicle seat structure provided with a lock mechanism operating means for forming an occupant liftable state,
The handle of the operation lever is capable of swinging a predetermined angle from the rear position of the shaft center to the front side around a swing shaft center extending in the longitudinal direction of the seat back side end portion,
The vehicle seat structure according to claim 1, wherein the lock mechanism operating means is actuated by swinging the operating lever forward. In the vehicle seat structure according to claim 1,
The vehicle seat structure according to claim 1, wherein a handle of the operation lever has a shape extending in an extending direction of the swing axis. In the vehicle seat structure according to claim 1 or 2,
When the seat cushion and the seat back are slid forward after the lock mechanism operating means is actuated by swinging the operation lever forward, the lock mechanism operating means is configured so that the seat cushion and the seat back are in the predetermined rear position. Until the vehicle is returned to the vehicle seat structure, the unlocked state is maintained regardless of the swinging of the operation lever to the rear side. In the vehicle seat structure according to any one of claims 1 to 3,
The seat cushion is movable up and down,
The seat cushion is moved from the upper position to the lower position in conjunction with the forward operation for rotating the seat back from the standing state to the forward position, and is interlocked with the standing operation for rotating from the forward position to the standing state. A vehicle seat structure comprising an interlocking mechanism for moving from a lower position to an upper position.

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