JP2009067345A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat with no components concentrated in the vicinity of a reclining device. <P>SOLUTION: In this vehicle seat 1, a seat back 3 is stopped in a predetermined forwardly inclined state by a stopper mechanism 11 by operating a walk-in lever 8, and a seat cushion 2 can be slid by unlocking a slide lock mechanism 10. The vehicle seat 1 includes: a link member 4 inclinably arranged in the seat back 3; a locus changing mechanism 33 for changing the moving locus of the link member 4 when forwardly inclining the seat back 3 from a first locus to a second locus by operating the walk-in lever 8; and an unlocking mechanism 20 unlocking the slide lock mechanism 10 by pulling a cable 15 by being applied with force not from the link member 4 moving the first locus but from the link member 4 moving the second locus. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle seat such as an automobile. In particular, the present invention relates to a vehicle seat in which a seat back is stopped in a predetermined forward tilted state with respect to a seat cushion by operating a walk-in lever, and the seat can slide back and forth with respect to the vehicle floor surface.

2. Description of the Related Art Conventionally, vehicle seats that change in various modes are known. For example, the vehicle seat described in Patent Document 1 includes a normal use mode in which the seat back is tilted backward with respect to the seat cushion, a folding mode in which the seat back falls on the seat cushion, and the seat back with respect to the seat cushion. Thus, the walk-in mode is changed to stop in a predetermined forward tilt state. The seat cushion is slidable back and forth by rails provided on the vehicle floor, and the slide is locked so as to be released by a slide lock mechanism. In the vicinity of the connecting portion between the seat back and the seat cushion, there is a reclining device that adjusts the inclination angle of the seat back, a rotating member that rotates as the seat back tilts, and a rotating member that is pushed during the walk-in mode. It has a lever that tilts. When the lever is tilted, the cable is pulled by the lever, and the slide lock mechanism is unlocked via the cable. Therefore, in the walk-in mode, the seat can be slid and the passenger can easily get on and off the rear row of seats.
Japanese Patent No. 3723797

  However, in the conventional seat, since the parts are concentrated in the vicinity of the reclining device, it is necessary to enlarge the vicinity of the reclining device. For example, the shield for concealing the vicinity of the reclining device becomes large, and there is a problem that the shield protrudes in the folding state and becomes an obstacle when storing the luggage. Therefore, an object of the present invention is to provide a vehicle seat in which parts are not concentrated in the vicinity of the reclining device.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat having a configuration as described in each claim. That is, according to the first aspect of the present invention, the vehicle seat includes a link member provided to be tiltable on the seat back, and a movement locus of the link member when the seat back is tilted forward by operating the walk-in lever. A trajectory change mechanism that changes from the first trajectory to the second trajectory, and a slide lock mechanism that pulls the cable by receiving the force from the link member that moves the second trajectory but does not receive the force from the link member that moves the first trajectory And an unlocking mechanism for unlocking.

  Therefore, by operating the walk-in lever, the seat can slide with respect to the vehicle floor. Further, the link member need not be provided in the vicinity of the reclining device, and the trajectory changing mechanism and the lock releasing mechanism need not be provided in the vicinity of the reclining device. Therefore, it is possible to avoid the concentration of parts in the vicinity of the reclining device. As a result, it is possible to prevent a shield or the like that hides the vicinity of the reclining device from becoming large, and problems such as the shield becoming a hindrance during luggage storage are reduced.

  According to the second aspect of the present invention, the vehicle seat includes a base frame that slides with a rail, and a front leg that connects the front side portion of the base frame and the front side portion of the seat cushion so as to be tiltable. And a seat back is attached to the rear part of a base frame so that tilting is possible, and the back part of a seat back and a seat cushion is connected so that tilting is possible by a link member. The trajectory changing mechanism has a tilt lock member that locks the link member and the seat cushion so as not to tilt and releases the lock when the walk-in lever is operated.

  Therefore, the seat has a five-bar link including a base frame, a front leg, a seat cushion, a link member, and a seat back. The trajectory changing mechanism changes the five-bar link to the four-bar link by locking the link member and the seat cushion so as not to tilt. Accordingly, the movement locus of the link member is changed by the locus changing mechanism. And a seat falls down on a vehicle floor surface side in a folding mode, when a seat leg falls down on a seat cushion in a four-bar link state, and a front leg falls down.

  According to the third aspect of the present invention, the link member is a member of the stopper mechanism, and moves the second locus by operating the walk-in lever so that the forward tilt of the seat back is made relative to the seat cushion. To stop in a predetermined forward tilt state. Therefore, the number of parts of the vehicle seat can be reduced by sharing the members.

  An embodiment of the present invention will be described with reference to FIGS. The seat 1 is a seat used for a vehicle such as a vehicle, and is particularly used for a second row seat of an automobile including three rows of seats. The seat 1 has a seat cushion 2 and a seat back 3 as shown in FIG. 1, and includes a normal use mode shown in FIG. 1, a walk-in mode shown in FIG. 2, and a folding mode (tilt down) shown in FIG. Mode).

  As shown in FIGS. 1 and 4, the seat 1 includes a pair of rails 7, a pair of base frames 5, a seat cushion 2, and a seat back 3. The rail 7 has a lower rail 7a that is fixed to the vehicle floor surface 34, and an upper rail 7b that slides forward and backward with respect to the lower rail 7a. The upper rail 7 b is provided at the lower end portion of the base frame 5. A slide lock mechanism 10 is provided between the base frame 5 and the lower rail 7a to releasably lock them. The slide lock mechanism 10 is unlocked by operating a release lever 17 provided at a front end portion of the base frame 5 so as to be tiltable. The lock can also be released by pulling the cable 15.

  As shown in FIGS. 1 and 4, one end portion of the front leg 6 is rotatably connected to the front side portion 5 b of the base frame 5. The other end of the front leg 6 is rotatably connected to the front side 2b of the frame 2a of the seat cushion 2. Accordingly, the front side portion of the seat cushion 2 is connected to the base frame 5 so as to be tiltable by the front leg 6. A spring 14 is attached between the lower end of the front leg 6 and the base frame 5 to urge the front leg 6 in the direction in which the front leg 6 is erected.

  As shown in FIGS. 1 and 4, a seat back 3 is tiltably attached to upper rear ends of the left and right base frames 5 via a reclining device 13. A reclining operation lever 9 is attached to one base frame 5 so as to be tiltable. By tilting the reclining operation lever 9, the left and right reclining devices 13 are interlocked to be unlocked. As a result, the angle of the seat back 3 can be adjusted with respect to the seat cushion 2. A reinforcing rod 5 a is provided between the rear side portions of the left and right base frames 5. The reinforcing rod 5a withstands an impact assumed at the time of a side collision of the vehicle and protects the seat 1 from the collision.

  The seat cushion 2 and the seat back 3 have rectangular frames 2a and 3a as shown in FIGS. The frames 2a and 3a are rotatably connected by a pair of left and right link members 4. The upper part of the link member 4 is rotatably connected to a pin part 3b formed at the lower part of the frame 3a. The lower part of the link member 4 is rotatably connected to a pin part 2c formed at the rear part of the frame 2a. Accordingly, the seat cushion 2, the link member 4, the seat back 3, the base frame 5, and the front leg 6 constitute a five-bar link.

  Between the link member 4 and the frame 2a of the seat cushion 2, as shown in FIGS. 6 and 7, a tilt lock member 16 that locks the link member 4 and the frame 2a so as not to tilt is provided. The tilt lock member 16 has a substantially triangular shape, and a shaft portion 16c that is rotatably connected to the link member 4 is formed at one corner. A connecting portion 16b to which the cable 12 is connected is formed at the other corner portion. The other corner is formed with a flange 16a that is hooked to the lock pin 2d. Between the tilt lock member 16 and the link member 4, a spring 16 d that biases the flange portion 16 a toward the lock pin 2 d is provided.

  As shown in FIGS. 6 and 7, the link member 4 has an arc-shaped elongated hole 4 c. A lock pin 2d protruding from the frame 2a of the seat cushion 2 passes through the elongated hole 4c. Then, the tilt lock member 16 is engaged with the lock pin 2d. Therefore, when the tilt lock member 16 is hooked on the lock pin 2d, the link member 4 is connected to the frame 2a by the two points of the pin portion 2c and the lock pin 2d and cannot tilt with respect to the seat cushion 2. As a result, the five-bar link described above is changed to a four-bar link.

  When the tilt lock member 16 is pulled by the cable 12 and rotated as shown in FIGS. 6 and 7, the tilt lock member 16 is detached from the lock pin 2d. Thereby, the link member 4 is unlocked with respect to the frame 2a, and the link member 4 can be tilted with respect to the frame 2a. However, the amount and direction of tilting are limited by the long hole 4c and the lock pin 2d. That is, the link member 4 tilts by a predetermined amount only in the direction in which the angle decreases toward the frame 2a.

  As shown in FIG. 6, when the tilt lock member 16 is hooked on the lock pin 2d, the seat 1 enters a four-bar link state. In this state, when the seat back 3 is tilted forward, the link member 4 moves forward along the arc-shaped first locus 31. As shown in FIG. 7, when the tilt lock member 16 is released from the lock pin 2d, the seat 1 enters a five-bar link state. When the seatback 3 is tilted forward in this state, the link member 4 moves along the second locus 32 and moves downward. Accordingly, the movement locus of the link member 4 can be switched between the first locus 31 and the second locus 32 by the locus changing mechanism 33 constituted by the tilt lock member 16 and the lock pin 2d.

  As shown in FIGS. 4 and 7, the seat 1 includes a push portion 4 a and a lock release mechanism 20 as a configuration for unlocking the slide lock mechanism 10 using the second locus 32. The pressing portion 4a is a pin, is provided at the lower portion of the link member 4, and protrudes toward the vehicle inner side (the back side of the sheet). The movement locus of the pressing portion 4a is switched to a first locus 31 and a second locus 32, and the second locus 32 includes an arc locus portion 32a and a vertically extending locus portion 32b. The arc locus portion 32 a overlaps a part of the first locus 31. The vertically extending locus 32b extends obliquely in the up and down direction closer to the center of the arc than the first locus 31. Accordingly, the link member 4 and the frame 2a move together, and then the link member 4 moves obliquely downward along the long hole 4c when the long hole 4c is substantially upright with respect to the lock pin 2d.

  As shown in FIGS. 5 and 8, the lock release mechanism 20 includes a base 21, a shaft member 23, and a tilting member 22. The base 21 is attached to the base frame 5. The shaft member 23 is inserted into the hole 22a of the tilting member 22, and the collar 25 is installed between the shaft member 23 and the hole 22a. Then, it is inserted into a non-circular hole 21 a formed in the base 21 so as not to rotate, and is secured to the base 21 by the mounting portion 26. The tilting member 22 tilts around the shaft member 23. A spring 24 is attached between the tilt member 22 and the shaft member 23 to press the tilt member 22 toward a stopper portion 21 c formed on the base 21.

  As shown in FIGS. 7 and 8, the tilting member 22 has a force receiving portion 22b at one end and a connecting portion 22c at the other end. The force receiving portion 22 b is configured to protrude from the vertically extending locus portion 32 b of the second locus 32, but not to the first locus 31. Accordingly, the force receiving portion 22b is pushed down by the push portion 4a only when the push portion 4a moves along the second locus 32. The inner cable portion 15a of the cable 15 is connected to the connecting portion 22c. The outer cable portion 15 b of the cable 15 is attached to the attachment portion 21 b of the base 21, and the other end portion of the inner cable portion 15 a is connected to the slide lock mechanism 10. Therefore, when the tilting member 22 is tilted by being pushed by the pressing portion 4a, the tilting member 22 pulls the inner cable portion 15a, and the slide lock mechanism 10 is unlocked. As a result, the seat 1 becomes slidable with respect to the vehicle floor 34.

  As shown in FIGS. 2 and 7, a contact surface 4 b is formed in the lower part of the link member 4. The contact surface 4b contacts the outer peripheral surface of the reinforcing rod 5a when the link member 4 moves along the second locus 32 and the seat 1 enters the walk-in mode. Therefore, the link member 4 is stretched between the base frame 5 and the frame 3a to stop the tilt of the seat back 3 in a predetermined forward tilt state. Therefore, the seat back 3 is brought into a predetermined forward inclined state by the stopper mechanism 11 composed of the link member 4 and the reinforcing rod 5a.

  As shown in FIGS. 1 and 4, a walk-in lever 8 is provided on the upper portion of the seat back 3 and is operated when the seat 1 is brought into the war-in mode. The walk-in lever 8 is tiltably provided on the frame 3a, and pulls the cable 12 by tilting. The cable 12 branches to the left and right along the way, and is connected to the left and right tilt lock members 16 and the left and right reclining devices 13.

  Therefore, by tilting the walk-in lever 8 and pulling the cable 12, the tilt lock member 16 tilts to the unlock position shown in FIG. Therefore, the link member 4 is in a state in which it can tilt with respect to the frame 3a of the seat back 3 (five-bar link state). Also, since the cable 12 is pulled, the reclining device 13 is unlocked by the cable 12. Therefore, the seat back 3 can be tilted with respect to the seat cushion 2. When the seat back 3 is tilted forward in this state, the link member 4 moves along the second locus 32.

  When the link member 4 moves along the second locus 32, the push portion 4a pushes the force receiving portion 22b of the lock release mechanism 20 downward as shown in FIG. As a result, the tilting member 22 tilts, the cable 15 is pulled, the slide lock mechanism 10 is unlocked, and the seat 1 can slide. Then, the contact surface 4 b of the link member 4 contacts the reinforcing rod 5 a as shown in FIG. 2, and the link member 4 is stretched between the seat back 3 and the base frame 5. As a result, the seat back 3 stops in a predetermined forward tilted state, and the seat 1 enters a walk-in manner. Thus, the passenger can easily get on and off the rear seat of the seat 1.

  When the reclining operation lever 9 is tilted as shown in FIGS. 1 and 4, the reclining device 13 is unlocked by the reclining operation lever 9, and the seat back 3 can be adjusted in angle with respect to the seat cushion 2. At this time, the link member 4 and the frame 3a cannot be tilted by the tilt lock member 16 as shown in FIG. Therefore, the seat 1 is in a four-bar link state, and when the seat back 3 is tilted forward in this state, the seat cushion 2 moves downward while moving forward as shown in FIG. Therefore, the sheet 1 is in a folded state in which the seat 1 sinks while moving to the front side.

  The slide lock mechanism 10 is locked in the folded state. Therefore, the sheet 1 can be prevented from sliding unexpectedly in the folded state. On the other hand, the slide lock mechanism 10 is unlocked by operating the release lever 17. Therefore, the seat 1 can be slid by operating the release lever 17. Although omitted in FIG. 2 and the like, the lock release mechanisms 20 are provided on both the left and right sides of the seat 1. A resin shield that hides the side surface of the base frame 5 is attached to the side surface of the base frame 5.

  The embodiment is formed as described above. That is, as shown in FIG. 7, the seat 1 is provided with a link member 4 that can be tilted to the seat back 3, and a movement locus of the link member 4 when the seat back 3 is tilted forward by operating the walk-in lever 8. The cable changing mechanism 33 for changing the first locus 31 to the second locus 32 and the link member 4 that does not receive a force from the link member 4 that moves the first locus 31 but receives the force from the link member 4 that moves the second locus 32 receive the cable 15. And a lock release mechanism 20 that unlocks the slide lock mechanism 10 by pulling the lever.

  Therefore, the seat 1 can be slid with respect to the vehicle floor surface 34 by operating the walk-in lever 8. Further, the link member 4 does not need to be provided in the vicinity of the reclining device 13, and the trajectory changing mechanism 33 and the lock release mechanism 20 need not be provided in the vicinity of the reclining device 13. Therefore, it is possible to avoid the concentration of parts in the vicinity of the reclining device 13. As a result, it is possible to prevent an increase in the size of the shield that hides the vicinity of the reclining device 13, and the problem of the shield becoming an obstacle when storing the luggage is reduced.

  The seat 1 has a base frame 5 and a front leg 6 as shown in FIGS. The trajectory changing mechanism 33 includes a tilt lock member 16 that locks the link member 4 and the seat cushion 2 so as not to tilt and releases the lock when the walk-in lever 8 is operated. Therefore, the seat 1 has a five-bar link composed of a base frame 5, a front leg 6, a seat cushion 2, a link member 4 and a seat back 3. Then, the trajectory changing mechanism 33 changes the five-bar link to the four-bar link by locking the link member 4 and the seat cushion 2 so as not to tilt. Therefore, the movement locus of the link member 4 is changed by the locus changing mechanism 33. Then, the seat 1 falls down on the seat cushion 2 in the four-bar link state, whereby the front leg 6 falls down and sinks to the vehicle floor 34 side in the folded state.

  The link member 4 is a member of the stopper mechanism 11 as shown in FIG. 2, and moves the second locus 32 by operating the walk-in lever 8 so that the seat back 3 is tilted forward. Is stopped in a predetermined forward tilted state. Therefore, the number of parts of the sheet 1 can be reduced by sharing the members.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) For example, the seat 1 of the above embodiment includes a base frame 5 that is slid by the rail 7, a seat back 3 that is tiltably attached to a rear end portion of the base frame 5, a seat back 3, and a base frame 5. The link member 4 that stops the tilting of the seat back 3 in a predetermined forward tilted state is provided. However, the seat cushion does not have the base frame 5 and the front leg 6, and the seat cushion that slides by the rail, the seat back that can be tiltably attached to the rear end portion of the seat cushion, and the seat back and the seat cushion are stretched. And a link member that stops the tilt of the seat back in a predetermined forward tilt state.
(2) The link member 4 of the above embodiment is a constituent member of the stopper mechanism 11. However, although the link member does not constitute a stopper mechanism, the link member is configured to be tiltable on the seat back, and the link member is switched between the first locus and the second locus according to the operation of the walk-in lever by the locus changing mechanism. It may be a form that is configured.
(3) The pressing portion 4a of the above embodiment has a pin shape. However, the pressing portion is not limited to a pin shape, and may be formed on the lower surface or side surface of the main body of the link member.
(4) Although the said embodiment was a sheet | seat used for vehicles, such as a motor vehicle, the sheet | seat used for the vehicle etc. which do not have a wheel may be sufficient.

It is a left view of a vehicle seat. It is a left view of the vehicle seat in a war-in aspect. It is a left view of the vehicle seat in a folding mode. It is a perspective view of the main component members of a vehicle seat. It is a partially expanded perspective view of the vehicle seat in the vicinity of the unlocking mechanism. It is a left side enlarged view of the vehicle seat in the vicinity of the unlocking mechanism. It is a left side enlarged view of the vehicle seat in the vicinity of the unlocking mechanism. It is a disassembled perspective view of a lock release mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Seat 2 ... Seat cushion 2a, 3a ... Frame 2d ... Lock pin 3 ... Seat back 4 ... Link member 4a ... Pushing part 4b ... Contact surface 4c ... Long hole 5 ... Base frame 5a ... Reinforcing rod 6 ... Front leg 7 ... Rail 8 ... Walk-in lever 9 ... Reclining operation lever 10 ... Slide lock mechanism 11 ... Stopper mechanism 12, 15 ... Cable 13 ... Reclining device 16 ... Tilt lock member 20 ... Lock release mechanism 22 ... Tilt member 22b ... Force receiving part 31 ... First trajectory 32 ... Second trajectory 33 ... Trajectory change mechanism 34 ... Vehicle floor

Claims (3)

A seat cushion that slides on a rail provided on a vehicle floor, a slide lock mechanism that releasably locks the slide of the seat cushion, a seat back that tilts with respect to the seat cushion so that the angle can be adjusted by a reclining device, and A stopper mechanism for stopping the tilting of the seat back in a predetermined forward tilted state; and a walk-in lever; and by operating the walk-in lever, the seat back is stopped in the predetermined forward tilted state by the stopper mechanism. And a vehicle seat in which the slide lock mechanism is unlocked,
A link member provided to be tiltable on the seat back, and a trajectory changing mechanism for changing a movement trajectory of the link member when the seat back is tilted forward from a first trajectory to a second trajectory by operating the walk-in lever. And an unlock mechanism that unlocks the slide lock mechanism by receiving a force from the link member that moves along the second locus but pulling a cable while receiving no force from the link member that moves along the first locus. A vehicle seat characterized by comprising: The vehicle seat according to claim 1,
A base frame that slides by a rail; and a front leg that connects the front side portion of the base frame and the front side portion of the seat cushion in a tiltable manner; a seat back is attached to the rear portion of the base frame so as to be tiltable; A seat back and a rear side portion of the seat cushion are connected to each other so as to be tiltable by a link member,
The trajectory changing mechanism includes a tilt lock member that locks the link member and the seat cushion so as not to tilt and releases the lock when the walk-in lever is operated. . The vehicle seat according to claim 1 or 2,
The link member is a member of the stopper mechanism, and moves the second locus by operating the walk-in lever to stop the forward tilt of the seat back in a predetermined forward tilt state with respect to the seat cushion. A vehicle seat characterized by that.

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