JP2013001175A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a rationalization of an operation structure of a vehicle seat.SOLUTION: The vehicle seat 1 includes reclining mechanisms 5 and 5 which keep a backrest angle of a seat back 2 adjustable, and a locking mechanism 10 which locks forward folding movement of the seat back 2 in a predetermined forward tilt position. A bidirectionally and rotatively operable release lever 6 is arranged in the vehicle seat 1. A pull-up operation of the release lever 6 makes the reclining mechanisms 5 and 5 undergo release operations, and brings about switching to a state in which the backrest angle of the seat back 2 can be adjusted. In addition, a push-down operation of the release lever 6 makes the locking mechanism 10 operated, releases the function of locking forward folding rotation of the seat back 2 to the predetermined forward tilt position, and brings about a state of enabling the seat back 2 to be reclined to a folded-down position.

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat provided with a reclining mechanism that adjustably holds the backrest angle of the seat back and a locking mechanism that locks the forward movement of the seat back at a predetermined forward tilt position.

  2. Description of the Related Art Conventionally, some vehicle seats are configured such that a locked state of a predetermined portion of a seat body is released by operating a turning lever provided on the seat body. Here, the following Patent Document 1 discloses a configuration in which the fixed state of the backrest angle of the seat back is released by operation of a rotation lever provided on the seat back. In this disclosure, the pivoting lever can be pivoted to either the front or rear side from the neutral position, and the fixed state of the seat back backrest angle is released regardless of which side is operated. It has become.

JP-A-8-11606

  However, in the above prior art, there are two directions of operation of the rotating lever, but there is only one type of object operated by these. Therefore, when a plurality of operation objects are set in the vehicle seat, It is desirable to be able to rationalize the operation structure. The present invention has been devised as a solution to the above problems, and the problem to be solved by the present invention is to rationalize the operation structure of the vehicle seat.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
A first aspect of the present invention is a vehicle seat including a reclining mechanism that can adjustably adjust a backrest angle of a seat back, and a locking mechanism that locks forward movement of the seat back at a predetermined forward tilt position. is there. The vehicle seat is provided with a turning lever that can be turned in both directions from a predetermined neutral position. The reclining mechanism is operated by rotating the rotating lever in one direction, and the seat back is switched to a state in which the backrest angle can be adjusted. By the turning operation of the turning lever in the other direction, the locking mechanism is operated, the state where the seat back is locked at the predetermined forward tilt position is released, and the seat back can be brought down to the position where the seat is greatly tilted. It becomes a state.

  According to the first aspect of the present invention, the operation of switching the seat back to a state in which the backrest angle of the seat back can be adjusted and the forward movement of the seat back are predetermined using a single turning lever capable of bidirectional turning operation. The operation of releasing the function of locking at the forward tilt position and the two operations can be performed separately. Thereby, rationalization of the operation structure of the vehicle seat can be achieved.

  According to a second aspect of the present invention, in the first aspect described above, the forward tilt operation member that switches the seat back to the state where the seat back can be brought down to the predetermined forward tilt position is operated from the rear side of the vehicle seat. It is arrange | positioned in the rear part position, and the rotation lever is arrange | positioned in the side part position of the vehicle outer side of the vehicle seat.

  According to the second aspect of the invention, since the forward tilt operation member is disposed at the rear position of the vehicle seat, a user of the rear row side seat of the vehicle seat operates the forward tilt operation member. Thus, it is possible to perform an operation of tilting the seat back to a predetermined forward tilt position to widen the boarding / alighting space. Further, since the turning lever is disposed at the side position on the vehicle outer side of the vehicle seat, the turning lever is operated from the position standing outside the entrance door on the vehicle outer side of the vehicle seat, You will be able to knock down the seat back to the position. By disposing both operation members in this way, the operation of tilting the seat back down and the operation of tilting it to the forward tilt position is disposed at an appropriate position where it can be used at an easy-to-use position. can do.

  In a third aspect based on the second aspect described above, the pivot lever is provided in such a form that its grip portion extends from the pivot center to the front side of the seat, and the grip portion is pulled up to the rear side of the seat. The reclining mechanism is operated by the operation, and the locking mechanism is operated by the operation in which the grip portion is pushed to the lower side of the seat.

  According to the third aspect of the invention, since the rotation lever has the above-described operation structure, when performing an angle adjustment such as tilting the backrest angle of the seat back to the rear side, the seat is held by grasping the grip portion. In the case where the operation is performed to lift the back in the backward tilting direction (the rear of the seat) and the seat back is greatly tilted, the gripping portion may be operated to be pushed down in the same tilting direction. Thereby, operation of a rotation lever can be performed simply along the operation | movement image of a seat back.

It is the perspective view which showed the external appearance structure of the vehicle seat. It is the perspective view which looked at the internal structure of the vehicle seat from the vehicle outside. It is the perspective view which looked at the internal structure of the vehicle seat from the vehicle inner side. It is the side view which showed the frame structure of the vehicle outer side of the vehicle seat. It is the VV sectional view taken on the line of FIG. FIG. 5 is a side view showing a state where the release lever is pulled up from the state of FIG. 4. It is the side view which showed the state by which the W / I strap was operated from the state of FIG. FIG. 8 is a side view showing a state in which the seat back is tilted to a forward tilt position from the state of FIG. 7. FIG. 9 is a side view showing a state where the release lever is pushed down from the state of FIG. 8. FIG. 10 is a side view showing a state in which the seatback is largely collapsed from the state of FIG. It is the side view which showed the frame structure inside the vehicle of the vehicle seat corresponding to the state of FIG. It is the side view which showed the state in the middle of being tilted to the forward tilt position. It is the side view which showed the state in which the seat back was tilted to the forward tilt position. It is the side view which showed the state by which the seat back was knocked down to the position.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of 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 the present embodiment is configured as a second row seat on the rear side of a passenger seat of a vehicle provided with a three row seat (not shown). The vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, and a headrest 4 that supports the head. As shown in FIGS. 2 to 3, the seat back 2 is a plane in which the lower ends of the left and right sides of the seat back frame 2 </ b> A that are assembled in an inverted U-shape forming the skeleton form the skeleton of the seat cushion 3, respectively. Reclined mechanisms 5 and 5 functioning as a rotation shaft device capable of rotation prevention are connected to the rear end portions of the left and right sides of the seat cushion frame 3A assembled in a U-shape.

  The reclining mechanisms 5 and 5 described above are normally held in a locked state in which the backrest angle of the seat back 2 with respect to the seat cushion 3 is fixed. The reclining mechanisms 5 and 5 are in a locked state in which the release lever 6 provided on the side of the seat cushion 3 on the vehicle outer side (the side closer to the passenger door) is pulled up (see FIG. 6) or the seat back 2 on the vehicle outer side. The W / I (walk-in) strap 7 provided at the lower part on the back side of the seat is released by an operation (see FIGS. 1 and 7) in which the occupant of the third row seat pulls backward on the seat. By releasing the locked state of these reclining mechanisms 5, 5, the seat back 2 can be tilted back and forth around the axis of each reclining mechanism 5, 5. Then, when the seat back 2 is adjusted to an arbitrary tilting position, the reclining mechanisms 5 and 5 are returned to the locked state again by releasing the above-described operations, and the seat back 2 is adjusted to the adjusted backrest. Fixed at the angular position. Here, the release lever 6 corresponds to the “rotating lever” of the present invention, and the W / I strap 7 corresponds to the “forward tilt operation member” of the present invention.

  Here, as shown in FIG. 2, a spiral spring 2 </ b> A <b> 3 is hooked between a vehicle outer side portion of the seat back frame 2 </ b> A and a seat cushion frame 3 </ b> A vehicle outer side portion. The spiral spring 2A3 has an inner end that is hooked on a vehicle outer side of the seat cushion frame 3A, and an outer end coupled to the vehicle outer side of the seat back frame 2A. The letter plate 2A2 is hooked from the rear side to the one part protruding to the vehicle outer side. By this spiral spring 2A3, the seat back 2 is always in a state where an urging force is applied in a direction in which the seat back 2 rotates forward. Therefore, in a state where no person is seated on the vehicle seat 1, the user pulls up the release lever 6 (see FIG. 6) from the position standing outside the passenger door outside the vehicle, or the third row When the seat occupant pulls the W / I strap 7 (see FIG. 7) from the rear side of the seat, the seat back 2 is pushed forward from the normal use position by the urging force of the spiral spring 2A3. It is like that.

  Here, as shown in FIGS. 3 to 4, the forward rotation of the seat back 2 is caused by the stopper pin 12 </ b> B of the locking mechanism 10 provided on the inner side surface of the seat cushion frame 3 </ b> A on the vehicle outer side. It is locked at the forward tilt position shown in FIG. 8 (corresponding to the “predetermined forward tilt position” of the present invention). As the seat back 2 tilts to the forward tilt position, as shown in FIGS. 2 and 11, the seat back 2 is provided on the inner side surface of the side portion of the seat cushion frame 3 </ b> A on the vehicle inner side (the side far from the passenger door). When the slide release mechanism 8 is pushed and kicked (see FIGS. 12 to 13), the slide locks of the slider devices 30 and 30 provided between the vehicle seat 1 and the floor via the cable 8C are operated. The state is to be released. By this release operation, the vehicular seat 1 can slide in the vehicle front-rear direction with respect to the floor. Therefore, by sliding the vehicle seat 1 to the vehicle front side in this state (a state in which the seat back 2 is tilted to the forward tilt position), a passenger's boarding / alighting space for getting on and off the third row seat on the rear row side is obtained. It can be secured widely to improve the boarding / exiting ability.

  Further, the vehicle seat 1 is operated by pushing down the release lever 6 described above with reference to FIG. 1 from the state in which the seat back 2 shown in FIG. The locked state by the locking mechanism 10 is released, and the seat back 2 is tilted over to the large tilt position that overlaps the upper surface of the seat cushion 3 beyond the forward tilt position. Specifically, as shown in FIG. 2 to FIG. 3, the large fall rotation of the seat back 2 protrudes outside the L-shaped plates 2 </ b> A <b> 2 and 2 </ b> A <b> 2 coupled to the outer portions of the left and right side lower portions of the seat back frame 2 </ b> A. Each piece is stopped at a position where it abuts and stops against each stopper surface 3A1, 3A1, which is formed to protrude in a square shape on the front side at the rear upper edge of the left and right sides of the seat cushion frame 3A. (See FIGS. 10 and 14). When the seat back 2 is largely collapsed, the state in which the above-described slide release mechanism 8 is pushed and kicked by the seat back 2 is released, and the slider devices 30 and 30 are returned to the slide-locked state again. (See FIG. 14). As a result, the vehicle seat 1 is in a state where the seat back 2 is largely folded down and is compactly folded, so that the vehicle interior space can be expanded widely, and the back surface of the seat back 2 that has been largely collapsed is It becomes a state where it can be used as a loading surface for various luggage storages or tables, and the convenience in the passenger compartment can be improved.

  Thus, the vehicle seat 1 can tilt the seat back 2 to the forward tilt position by the pulling operation of the release lever 6 or the pulling operation of the W / I strap 7, and the release lever after tilting. By pressing down 6, the seat back 2 is tilted further forward so that it can be largely tilted to the position. Hereinafter, the structure of each mechanism mounted on the vehicle seat 1 described above will be described in detail. As shown in FIG. 1, the above-described seat back 2 has a cushion pad 2 </ b> B made of a urethane resin foam molding on the surface portion of the seat back frame 2 </ b> A shown in FIG. 2 or 3 described above. In addition, a cover 2C made of cloth is applied so as to cover the entire surface. Similarly, the seat cushion 3 is also covered with a cushion pad 3B made of a foamed foam of urethane resin on the surface portion of the seat cushion frame 3A shown in FIG. 2 and FIG. A cover 3C made of cloth is placed so as to cover it.

  First, the structure of each reclining mechanism 5 and 5 is demonstrated. The reclining mechanisms 5 and 5 are arranged in a bilaterally symmetrical direction, but the basic configuration of both is the same. Therefore, in the following, only the configuration of the reclining mechanism 5 arranged outside the vehicle shown in FIG. 4 will be described on behalf of these. As shown in FIG. 5, the reclining mechanism 5 includes a disc-shaped ratchet 5A that is in contact with the outer surface of the side frame of the seat back frame 2A and integrally welded thereto, and a side frame of the seat cushion frame 3A. A disc-shaped guide 5B that is in contact with the inner surface of the plate and is integrally welded. The ratchet 5A and the guide 5B are fitted in the axial direction and can rotate relative to each other around the same axis. In this state, the outer ring 5C is assembled so as to be prevented from coming off in the axial direction.

  The ratchet 5A and the guide 5B have two poles 5D and 5D each having an external tooth incorporated between them, and the hinge cam 5F is pivotally supported by the central portion of the guide 5B. The relative rotation is locked or released by being pressed so as to mesh with the ratchet 5A via the slide cam 5E that is slid by the 5F, or operated so as to be released from the meshed state with the ratchet 5A. It is the structure which can be switched so that.

  The hinge cam 5F is normally rotated and biased by the biasing force of the spiral spring 5G hooked between the hinge cam 5F and the pawls 5D and 5D in a state of being held in mesh with the ratchet 5A. ing. Thus, the reclining mechanism 5 is normally in a state in which the backrest angle of the seat back 2 is fixed in a state where the relative rotation between the ratchet 5A and the guide 5B is locked (rotation stopped state). However, the hinge cam 5F is rotated by the operation of the release lever 6 and the W / I strap 7 (see FIG. 1) described above, with the operation shaft 5H inserted through the shaft center portion and integrated in the rotation direction. As a result, the pawl 5D is rotated against the urging force of the spiral spring 5G, and the pawls 5D and 5D are pulled back so as to be disengaged from the ratchet 5A. Thereby, the state (locked state) in which the ratchet 5A and the guide 5B are prevented from rotating is released, and the fixed state of the backrest angle of the seat back 2 is released.

  Further, the hinge cam 5F returns to the state in which the pawls 5D and 5D are engaged with the ratchet 5A by the urging force of the spiral spring 5G again by releasing the operation state of the release lever 6 and the W / I strap 7. To hold. The above is the basic structure of each reclining mechanism 5, 5. Note that the operation shaft 5H of the reclining mechanism 5 arranged on the vehicle inner side is integrally connected to each other by the operation shaft 5H of the reclining mechanism 5 arranged on the vehicle outer side and a connecting rod 5R. Are interlocked with a movement that is rotated by a release arm 5L to be described later, and lock / release switching operations are performed all at once.

  Next, the configuration of the release lever 6 will be described with reference to FIGS. 4 and 6. As shown in FIG. 4, the release lever 6 is rotatably connected to a surface portion of the side frame outside the vehicle of the seat cushion frame 3 </ b> A by a connecting shaft 6 </ b> B. Specifically, the connecting shaft 6B is integrally connected to the seat cushion frame 3A, and the release lever 6 is rotatably connected to the connecting shaft 6B. The release lever 6 is pivotally supported by the connecting shaft 6B at a rear position that is directly below the seat back 2, and an arm piece that serves as a grip portion 6A extends from the pivotal support portion toward the front side of the seat. Is formed. The release lever 6 is normally connected to both ends of the tension spring 6C shown in FIG. 4 and the center of rotation of the release lever 6 (the connecting shaft 6B) by the urging force of the tension spring 6C hooked between the seat cushion frame 3A. ) In a straight line (corresponding to the “neutral position” of the present invention) and is held in a state where it can be rotated in both directions.

  In addition to the release lever 6, the operation link 6D is rotatably connected to the connecting shaft 6B. The operation link 6D is configured to extend the arm piece in two radial directions, and the arm piece extending to the rear side of the seat in the initial state of FIG. 4 is described above via the driven link 6E. The release arm 5L connected to the operation shaft 5H of the reclining mechanism 5 is linked. Specifically, the driven link 6E is formed in an elongated shape in the seat height direction, and its upper end portion is rotatably connected to the rear end portion of the release arm 5L by the connecting shaft 6E1, and the lower end portion is The connecting shaft 6E2 is rotatably connected to the rear end portion of the arm piece extending to the rear side of the operation link 6D described above. Here, the release arm 5L is provided so as to extend from the connecting portion with the operation shaft 5H of the reclining mechanism 5 disposed on the vehicle outer side to the seat rear side. The front end of the W / I strap 7 is connected to the upper end of the connecting arm 6D2 that extends long above the seat of the operation link 6D.

  As shown in FIG. 6, when the release lever 6 is pulled up, the operation link 6 </ b> D has a leg piece 6 </ b> D <b> 1 formed on the upper surface of the arm piece that extends to the rear side of the seat. It is pushed by the formed corner 6A1 and rotates together with the release lever 6 in the clockwise direction in the figure. Accordingly, the driven link 6E is operated so as to be pushed downward, and the release arm 5L connected to the operation shaft 5H of the reclining mechanism 5 is rotated in the same direction, so that the reclining mechanisms 5 and 5 are unlocked. Is done. Further, the operation link 6D is released from the state in which the release lever 6 is lifted, and the release lever 6 is returned to the initial position shown in FIG. 4 by the urging force of the tension spring 6C. , 5 is returned to the original initial position state by the action of the urging force that returns the locked state to the locked state. Further, as shown in FIG. 7, the operation link 6D is rotated by the connecting arm 6D2 connected to the W / I strap 7 even when the W / I strap 7 is operated to the rear side of the seat. The reclining mechanisms 5 and 5 are unlocked by being rotated in the same manner as when pushed by the release lever 6 described above with reference to FIG.

  Next, the configuration of the slide release mechanism 8 will be described with reference to FIGS. As shown in FIG. 11, the slide release mechanism 8 includes an operation link 8A, a kick link 8B, and a cable 8C. The operation link 8A is rotatably connected to the inner surface of the side frame on the vehicle inner side of the seat cushion frame 3A by a connecting shaft 8A1. The kick link 8B is axially connected to the operation link 8A by a connecting shaft 8A2. The operation link 8A has a shape in which the arm piece extends in two radial directions, and is kicked by the connecting shaft 8A2 on the arm piece that extends downward in the rear direction of the seat in the initial state shown in FIG. The lower end portion of 8B is rotatably connected to the shaft. Further, a cable 8C for operating a lock release arm 33 (to be described later) for releasing the slide lock state of each slider device 30, 30 is connected to the arm piece extending in the seat front direction of the operation link 8A. Yes. Here, the operation link 8A is rotatably connected to the connecting shaft 8A1, and the connecting shaft 8A1 is integrally coupled to the seat cushion frame 3A. A torsion spring 8A3 that urges the operation link 8A to rotate counterclockwise is hooked between the operation link 8A and the locking plate 3A3 formed on the seat cushion frame 3A. As a result, the operation link 8A is normally locked at a position where the arm piece extending in the rearward downward direction of the seat contacts the lower surface of the locking plate 3A3 by the biasing force of the torsion spring 8A3. It is said that.

  The kick link 8B is formed in a U-shaped curve toward the rear of the seat, and the lower end of the figure is an arm piece that extends downward in the rear of the operation link 8A by the connecting shaft 8A2. The shaft is rotatably connected. Specifically, the connecting shaft 8A2 is integrally connected to the kick link 8B, and is rotatably connected to the operation link 8A. Between the connecting shaft 8A2 and the operation link 8A, a torsion spring 8A4 that constantly biases the kick link 8B integrated with the connecting shaft 8A2 in the clockwise direction in the figure is hooked. As a result, the kick link 8B is normally held in a state where it is locked by pressing the U-shaped curved concave surface against the connecting shaft 8A1 which is the rotation shaft of the operation link 8A by the biasing force of the torsion spring 8A4. ing.

  A round bar-like leg pin 8B1 protruding in the axial direction is provided at the upper end of the kick link 8B in the figure. As shown in FIG. 11, in the initial state, the leg pin 8B1 is moved by the forward tilting rotation of the seat back 2 by the inner kick portion 2A1b provided protruding from the front lower peripheral edge of the seat back frame 2A. It is in a state where it is exposed at a position on the coming locus. As a result, the kick link 8B provided with the leg pin 8B1 is pushed and kicked by the inner kick portion 2A1b by the operation in which the seat back 2 is tilted to the forward tilted position, as shown in FIGS. As shown in the figure, the connecting shaft 8A1 is used as a fulcrum and is integrally pushed with the operation link 8A via the connecting shaft 8A2 so as to be pushed clockwise in the drawing. Then, by the rotation of the operation link 8A, the cable 8C is pulled, and the unlocking arm 33 connected to each of the slider devices 30 and 30 is operated to slide the slider devices 30 and 30. The locked state is released. When the kick link 8B is pushed around by the inner kick portion 2A1b, as shown in FIG. 13, when the seat back 2 is locked at the forward tilted position, the leg pin 8B1 is the peripheral surface of the inner kick portion 2A1b. By being kept in a state where it rides up, it is held in a pushed state.

  However, as shown in FIG. 14, the kick link 8B is moved to a position where the inner kick portion 2A1b comes out of the interference with the leg pin 8B1 when the seat back 2 is pushed down to the large tilt position beyond the forward tilt position. After passing, both the torsion springs 8A3 and 8A4 return to the initial position before the rotation operation together with the operation link 8A. Thereby, the pulling operation state of the cable 8C connected to the operation link 8A is released, and the slider devices 30 and 30 are returned to the slide-locked state again. The kick link 8B returned to the initial position has a relationship in which the leg pin 8B1 is pushed and kicked again by the inner kick portion 2A1b due to the movement of the seat back 2 being greatly tilted to the original use position. Sometimes, the kick link 8B is independently rotated counterclockwise around the connecting shaft 8A2 against the urging force of the torsion spring 8A4, and the kick link 8B is rotated in the same direction around the connecting shaft 8A1. It does not rotate together with the operation link 8A whose rotation is locked. By the single rotation of the kick link 8B, the movement of raising the seat back 2 can be released so as not to apply an excessive tensile force or bending force to the cable 8C connected to the operation link 8A.

  Here, as shown in FIGS. 2 to 3, each of the slider devices 30, 30 is provided as a pair on the left and right between the lower part of both side frames of the seat cushion frame 3 </ b> A and the floor. Each of the slider devices 30 and 30 is fixed on the floor and extended in the front-rear direction of the seat, and is fixed to the seat cushion frame 3A and assembled in a state in which it can slide back and forth with respect to the lower rail 31. An upper rail 32 and a lock claw (not shown) that is provided on the upper rail 32 and locks the slide of the upper rail 32 by engagement with the lower rail 31. Each of the lock claws (not shown) is normally held in a state in which the slide of the upper rail 32 is locked by engaging with the lower rail 31 by the urging force of a spring (not shown) hooked between the upper rail 32 and the upper rail 32. By being operated to rotate against the urging force, the slide rail is released from the engagement with the lower rail 31 to release the above-described slide lock state.

  Each of the lock claws (not shown) is connected integrally with a connecting rod 34 between them, so that the operation of unlocking each other is performed synchronously. A lock release arm 33 is integrally coupled to an end portion of the connecting rod 34 on the vehicle inner side, and the cable 8C is connected with the operation of the slide release mechanism 8 accompanying the forward rotation of the seat back 2 described above. The lock release arm 33 is rotated through the connecting rod 34, and the lock claws are rotated through the connecting rod 34, so that the slide lock state of the slider devices 30 and 30 is released.

  Next, the configuration of the locking mechanism 10 will be described with reference to FIGS. 1 to 4 and FIGS. 6 to 10. As shown in FIG. 4, the locking mechanism 10 includes a support arm 11, a stopper arm 12, and an operation arm 13. As shown in FIG. 3, the support arm 11 and the stopper arm 12 are arranged on the inner surface of the side frame outside the vehicle of the seat cushion frame 3A, and the operation arm 13 is connected to the seat as shown in FIG. The cushion frame 3A is disposed on the outer surface of the side frame on the vehicle outer side.

  The support arm 11 and the operation arm 13 are integrally coupled to each other by a coupling shaft 13A, and are pivotally coupled to the side frame of the seat cushion frame 3A. A cable 6F is connected between the operation arm 13 and the release lever 6 described above, and the release lever 6 is rotated in a direction to be pushed down from the initial position (neutral position) shown in FIG. As a result, it is rotated in the counterclockwise direction shown in the figure via the cable 6F (see FIG. 9). Specifically, the end of the cable 6F on the side connected to the release lever 6 is hooked in an arc-shaped long hole 6A2 formed in the release lever 6A and extending in the rotation direction, and the release lever 6A is When the lifting operation is performed, the movement is released by the shape of the long hole 6A2, but a pulling operation is performed for the operation of pushing down the release lever 6A. As shown in FIG. 4, the support arm 11 has a shape that extends arm pieces in two radial directions, and the arm piece that extends forward on the sheet is a stopper of a stopper arm 12 described later. A tension spring 11 </ b> A is hooked between the arm cushion extending in the forward and downward direction of the seat and the seat cushion frame 3 </ b> A. Due to the biasing force of the tension spring 11A, the support arm 11 and the operation arm 13 integrated with the support arm 11 are normally rotated and biased clockwise about the connecting shaft 13A. The arm piece extending in the forward and downward direction of the seat is locked at a position where it comes into contact with the rear surface of the locking plate 3A4 formed integrally with the seat cushion frame 3A.

  The stopper arm 12 is provided so as to be rotatably connected to the side frame of the seat cushion frame 3A by a connecting shaft 12A. A tension spring 12C is hooked between the stopper arm 12 and the seat cushion frame 3A. Normally, the stopper arm 12 is urged to rotate clockwise by the urging force of the tension spring 12C. A state in which a round bar-like stopper pin 12B provided protruding in the axial direction at the front end portion is locked in a state where it is pressed against the outer peripheral surface of the arm piece extending forward on the seat of the support arm 11; Has been. The force with which the stopper pin 12B is pressed against the outer peripheral surface of the arm piece of the support arm 11 is formed by the outer peripheral surface of the support arm 11 being curved in the shape of an arc drawn around the connecting shaft 13A. Further, it acts straight in the radial direction toward the connecting shaft 13A, and is supported by the connecting shaft 13A with a strong support force.

  As shown in FIG. 4, the stopper pin 12B is moved in the initial state by the forward tilting rotation of the seat back 2 by the outer kick portion 2A1a provided protruding from the front lower peripheral edge of the seat back frame 2A. It is in a state where it is exposed at a position on the coming locus. Accordingly, as shown in FIG. 8, the stopper pin 12B comes into contact with the outer kick portion 2A1a described above when the seat back 2 is tilted to the forward tilt position, and the support pin 11B is supported via the support arm 11 described above. The forward tilt rotation of the seat back 2 is locked at the forward tilt position. The locked state of the forward rotation of the seat back 2 by the stopper pin 12B is released by an operation in which the user pushes the release lever 6 downward from the initial position (neutral position).

  Specifically, as shown in FIG. 9, when the release lever 6 is pushed downward, the cable 6F is pulled and the operation arm 13 is rotated in the counterclockwise direction shown in the figure around the connecting shaft 13A. The support arm 11 rotates integrally with the support arm 11 and is released from the contact state with the stopper pin 12B. At this time, the support arm 11 can be removed from the contact with the stopper pin 12B with a relatively light force because the contact surface with the stopper pin 12B is the arc surface. By the above operation, the stopper arm 12 provided with the stopper pin 12B rotates in the clockwise direction in the figure by the urging force of the tension spring 12C, retracts to a position where it does not come into contact with the outer kick portion 2A1a, and the seat back 2 is tilted forward. The function to stop rotation at the position does not work. As a result, as shown in FIG. 10, the seat back 2 is tilted forward beyond the forward tilt position by its forward tilting rotational force, and is provided at the lower outer portions of the left and right sides of the seat back frame 2A. The L-shaped plates 2A2 and 2A2 are brought into a large-fall position where they are brought into contact with the stopper surfaces 3A1 and 3A1 formed on the left and right side portions of the seat cushion frame 3A and locked. The stopper arm 12 that has been retracted by the depression operation of the release lever 6 is returned to the initial position by the strong spring force of the tension spring 11A that overcomes the tension spring 12C when the operation state of the release lever 6 is released. While being guided by the outer peripheral surface shape (inclined surface shape) of the support arm 11, it is returned to the original initial position state capable of the locking function shown in FIG. 4.

  Thus, according to the configuration of the vehicle seat 1 of the present embodiment, the backrest angle of the seat back 2 is switched to a state in which the seat back 2 can be adjusted by using one release lever 6 capable of bidirectional rotation. The operation and the operation of releasing the function of locking the forward movement of the seat back 2 at a predetermined forward tilt position can be performed separately. Thereby, rationalization of the operation structure of the vehicle seat 1 in which a plurality of operation targets are set can be achieved.

  Further, since the W / I strap 7 is disposed at the rear position of the vehicle seat 1, the user of the rear row side seat (third row seat) of the vehicle seat 1 allows the user of the W / I strap 7. By operating the, the seat back 2 is brought down to a predetermined forward tilt position, and an operation for expanding the boarding / exiting space can be performed. In addition, since the release lever 6 is disposed at the side position of the vehicle seat 1 outside the vehicle, the release lever 6 can be operated from the position of the vehicle seat 1 standing outside the entrance door. As a result, the seat back 2 can be greatly collapsed and brought to the position. By arranging both the operation members in this manner, the state in which the operation of inclining the seat back 2 or the operation of inclining to the forward tilted position is provided at an appropriate position where it can be used at an easy-to-use position. It can be.

  Further, the release lever 6 is provided with a gripping portion 6A extending from the rotation center (the connecting shaft 6B) to the front side of the seat, and the reclining mechanism 5 is operated by the operation of lifting the gripping portion 6A to the rear side of the seat. , 5 are operated, and the locking mechanism 10 is released by an operation in which the gripping portion 6A is pushed to the lower side of the sheet. Since the release lever 6 has such an operation structure, when the angle adjustment such as tilting the backrest angle of the seat back 2 is performed rearward, the seat back 2 is tilted backward by grasping the grip portion 6A. When the seat back 2 is operated to be pulled up in the direction in which it is to be lifted and the seat back 2 is largely tilted, the gripping portion 6A may be operated to be pushed down in the same tilting direction. Thereby, the operation of the release lever 6 can be easily performed along the operation image of the seat back 2.

  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-described embodiment, the seat back 2 is tilted to the predetermined forward tilt position by the unlocking of the reclining mechanisms 5 and 5. The tilting to the tilted position or the tilting to the large tilted position may be performed by releasing the lock of the hinge mechanism set separately from the reclining mechanism by operating the rotating lever.

  Further, the turning operation direction of the turning lever is not limited to the seat height direction shown in the above embodiment, and may be set in the seat width direction or the seat front-rear direction. Further, the position of the rotation lever is not limited to the side position of the vehicle seat outside the vehicle, but can be set to various positions of the vehicle seat such as the side portion inside the vehicle and the shoulder portion of the seat back. It can be done.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2A Seat back frame 2A1a Outer kick part 2A1b Inner kick part 2A2 L-shaped board 2A3 Spiral spring 2B Cushion pad 2C Cover 3 Seat cushion 3A Seat cushion frame 3A1 Stopper surface 3A3 Locking board 3A4 Locking board 3B Cushion pad 3C Cover 4 Headrest 5 Reclining mechanism 5A Ratchet 5B Guide 5C Outer ring 5D Pole 5E Slide cam 5F Hinge cam 5G Spiral spring 5H Operation shaft 5L Release arm 5R Connecting rod 6 Release lever (rotating lever)
6A Gripping part 6A1 Corner part 6A2 Long hole 6B Connection shaft 6C Tensile spring 6D Operation link 6D1 Leg piece 6D2 Connection arm 6E Driven link 6E1 Connection shaft 6E2 Connection shaft 6F Cable 7 W / I strap (Forward tilt operation member)
8 Slide release mechanism 8A Operation link 8A1 Connection shaft 8A2 Connection shaft 8A3 Torsion spring 8A4 Torsion spring 8B Kick link 8B1 Leg pin 8C Cable 10 Locking mechanism 11 Support arm 11A Tension spring 12 Stopper arm 12A Connection shaft 12B Stopper pin 12C Tension spring 13C Operation arm 13A Connection shaft 30 Slider device 31 Lower rail 32 Upper rail 33 Lock release arm 34 Connection rod

Claims (3)

A vehicle seat comprising: a reclining mechanism for holding the back angle of the seat back so as to be adjustable; and a locking mechanism for locking the forward movement of the seat back at a predetermined forward tilt position.
The vehicle seat is provided with a turning lever that can be turned in both directions from a predetermined neutral position, and the reclining mechanism is operated by turning the turning lever in one direction. Then, the seat back is switched to a state in which the backrest angle can be adjusted, and the locking mechanism is operated by the turning operation of the turning lever in the other direction so that the seat back is at the predetermined forward tilt position. A vehicle seat characterized in that the locked state is released and the seat back is brought to a large collapse position. The vehicle seat according to claim 1,
A forward tilt operation member for switching the seat back to a state where the seat back can be brought down to the predetermined forward tilt position is disposed at a rear position operated from the rear side of the vehicle seat, and the turning lever Is disposed at a side position on the vehicle outer side of the vehicle seat. The vehicle seat according to claim 2,
The rotating lever is provided with a gripping portion extending from the center of rotation to the front side of the seat, the reclining mechanism is operated by an operation of lifting the gripping portion to the rear side of the seat, and the gripping portion is seated The vehicle seat, wherein the locking mechanism is operated by an operation of being pushed downward.

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