JP4317707B2 - Vehicle seat device - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a vehicle seat device.
[0002]
[Prior art and its problems]
  2. Description of the Related Art A vehicle seat device includes a type with a slide memory function that stores a slide position of a seat (upper rail) with respect to a lower rail. Such a slide memory function is used during a so-called walk-in operation in which the seat back of the front seat is tilted forward and slid forward when entering and exiting the rear seat. However, the sliding relationship of the seat back is released by the forward tilting operation of the seat back, and when the seat back is raised, the slide lock state is established again.ForWhen returning from the walk-in state, if the seat back is raised before the seat is retracted to the position stored by the slide memory function, the slide lock will be applied at that time, so the slide memory function will not be fully utilized. There is a fear. As this type, there is a sheet device described in JP-A-8-253064.
[0003]
On the other hand, the seat device described in Japanese Patent Application Laid-Open No. 11-321393 has a structure in which the slide lock is not applied unless the seat is retracted to the memory position even when the seat back is raised. In this seat device, when the seat cannot be retracted to the memory position due to a rear obstacle, the seat back stands up and is temporarily seated even though the slide lock is not applied. From the viewpoint of safety, such an unstable seatable state is not preferable.
[0004]
[Patent Literature]
JP-A-8-253064
JP-A-11-321393
[0005]
OBJECT OF THE INVENTION
The present invention provides a vehicle seat device capable of effectively utilizing the slide memory function while reliably functioning the slide lock regardless of the position of the seat when seated based on the above awareness of the problems with the conventional device. The purpose is to do.
[0006]
SUMMARY OF THE INVENTION
  The present invention provides a lower rail on the floor surface side and an upper rail that is slidable with respect to the lower rail and is fixed to the seat side; a seat cushion that is supported by the upper rail and moves in a sliding direction together with the upper rail; Seat back pivoted to the standing position and forward tilt position; when the seat back is in the standing position, the upper rail slides with respect to the lower rail in a locked state, and when it is in the forward tilt position, the unlock allows the sliding A vehicle seat apparatus comprising: a slide lock mechanism that is in a state; and a slide memory mechanism that stores a seat position when the seat back is tilted forward and restricts movement of the seat backward from the storage position; Has an engaging member that engages in the forward tilt position of the seat back and releases the engagement in the standing positionDoProviding a forward tilt holding mechanismWhen the seat is moved toward the storage position from the walk-in state in which the seat back is tilted forward and the seat is moved forward with respect to the storage position by the slide memory mechanism, the forward tilt holding mechanism is engaged with the engagement member. To give the seat back a resistance to the standing position, and when the backward movement of the seat from the walk-in state is restricted, the seat back is turned to the standing position with the backward restriction portion as a fulcrum. Thus, the engagement of the engaging member of the forward tilt holding mechanism is released. For example, the slide memory mechanism moves in the sliding direction along with the seat with respect to the lower rail when the seat back is in the standing position, and the relative movement with respect to the lower rail is restricted and the original seat position is stored when the seat back is tilted forward. It has a memory member, and when the seat returns to the storage position from the walk-in state, it is configured to abut against the memory member and the backward movement is restricted, and the contact portion between the memory member and the seat is used as a fulcrum. The seat back can be caused while releasing the engagement of the forward tilt holding mechanism.
[0007]
  As one aspect of the forward tilt holding mechanism, it is supported so that it can rotate relative to the seat back about the pivot axis of the seat back, and the relative angle with the seat back does not rotate when the seat back is tilted forward Let the ratchet formed on the outer edge of this ratchetForward tilt lockWhen the ratchet is tilted forward,Forward tilt lockA pole supported so as to be movable with respect to the seat back so that it can be engaged and disengaged with respect to the recess, and the pole of the ratchetForward tilt lockA biasing member that biases in the direction of engagement with the recess may be provided. In the forward tilt holding mechanism of this aspect, the ratchetofOn the outer edgeIn addition to the forward tilt lock recess that constitutes the forward tilt holding mechanism,Seat back with multiple recessesOrigin ofStandingIn placePoleAnd clerkCombineWith a second recessIn this case, for example, it can function as a constituent member of a reclining memory mechanism that stores the reclining position of the seat back.
[0008]
As a different aspect of the forward tilt holding mechanism, a movable engagement member that is provided with a fixed engagement member on the seat back side, engages with the fixed engagement member when the seat back is tilted forward, and is movable in a direction to release the engagement. May be provided on the seat cushion side.
[0009]
The movable engagement member provided on the seat cushion side can be, for example, a holding spring that can be elastically deformed in a state of holding the fixed engagement member and a state of releasing the holding.
[0010]
  The movable engagement member on the seat cushion side is a swinging member that can swing between an engagement position and a disengagement position with respect to the fixed engagement member.(First swing member)And a biasing member that biases the swinging member toward the engagement position. In this form furtherA second swinging member that moves in a sliding direction together with the seat and swings in conjunction with the first swinging member;SheetFrom the walk-in stateIn the storage position by the slide memory mechanismMovingWhenThe second rocking member is rotated in contact with the memory member of the slide memory mechanism, and the first rocking member is rotated against the biasing member.Forcibly rotate the swing member to the disengagement positionConfigured asMay be.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. The front seat (passenger seat or driver's seat) 11 of the vehicle shown in FIGS. 1 and 2 has a seat cushion 12 that supports the butt of the seated person and a seat back 13 that supports the back of the seated person. A seat cushion frame 14 (FIG. 4) that forms the skeleton of the seat cushion 12 is supported by the upper rail 15. The seat cushion frame 14 and the upper rail 15 may be an integral member, or a lifter mechanism for height adjustment may be provided between the seat cushion frame 14 and the upper rail 15. The upper rail 15 is supported so as to be slidable in the longitudinal direction with respect to the lower rail 16 fixed to the floor panel (floor surface) 10 of the vehicle body. By sliding the upper rail 15 with respect to the lower rail 16, the seat 11 position in the front-rear direction can be changed. A pair of the upper rail 15 and the lower rail 16 are provided separately from each other in the left-right direction of the seat 11.
[0013]
A plurality of slide lock holes 16a are formed in the lower rail 16 along the longitudinal direction thereof. On the upper rail 15 side, a slide lock plate 17 having a lock claw 17a engageable with the slide lock hole 16a and a pressed arm 17b positioned above the lock claw 17a is pivotally attached by a rotating shaft 17x. Has been. The axis of the rotation shaft 17x is parallel to the longitudinal direction of the lower rail 16, and the slide lock plate 17 centering on the rotation shaft 17x is in a lock position (FIG. 12) for engaging the lock claw 17a with the slide lock hole 16a. , And can be rotated to the unlocking position (FIG. 13) to be removed. When the slide lock plate 17 is in the locked position, sliding of the upper rail 15 with respect to the lower rail 16 is restricted. The slide lock plate 17 is rotationally biased toward the lock position by a lock biasing spring 17c (shown only by arrows in FIGS. 12 and 13). The pressed arm 17 b is inserted into a square hole 15 a formed in the upper rail 15 and protrudes in the side surface direction opposite to the upper rail 15.
[0014]
A loop bracket 18 is pivotally attached to the upper rail 15 via a rotation shaft 18x orthogonal to the rotation shaft 17x of the slide lock plate 17 (that is, the axis is directed to the left and right direction of the seat). The pressing portion 18 a provided at one end is in contact with the pressed portion 19 a of the lock open bracket 19. The lock open bracket 19 is coaxial with the loop bracket 18 and can rotate relative to the loop bracket 18 (see FIG. 10), and a pressing portion 19b is provided at an end portion on the opposite side of the rotation shaft 18x that is the rotation center. The pressing portion 19b is inserted into the square hole 15a of the upper rail 15 and is positioned above the pressed arm 17b of the slide lock plate 17 (see FIGS. 12 and 13). When the loop bracket 18 is rotated clockwise in FIG. 5 via the loop handle 18b, the pressing portion 18a presses the pressed portion 19a to rotate the lock open bracket 19 in the same direction. The pressing portion 19b presses the pressed arm 17b, and the slide lock plate 17 can be rotated in the unlocking direction against the lock urging spring 17c.
[0015]
The seat 11 has a slide memory function for storing the position of the seat 11 before sliding when performing a walk-in operation of sliding forward while tilting the seat back 13 forward and backward when entering and exiting the rear seat. Note that the clockwise direction and the counterclockwise direction appearing in the following description related to the slide memory function mean the rotating directions in the side views of FIGS.
[0016]
A catch lever 20 is pivotally attached to the upper rail 15 on the side surface opposite to the side surface on which the loop bracket 18 and the lock open bracket 19 are supported. The catch lever 20 is rotatable about a rotation shaft 18x common to the loop bracket 18 and the lock open bracket 19 (see FIG. 10), and has a bifurcated catch at the end opposite to the rotation shaft 18x. Part 20a. The catch lever 20 is coupled to the stopper lever 22 via a torsion spring 20b. The stopper lever 22 is supported so as to rotate integrally with the loop bracket 18 coaxially (rotating shaft 18x). A lock open lever 21 is pivotally attached to the upper rail 15 via a rotating shaft 21x on the same side as the catch lever 20 and the stopper lever 22 are supported. The lock open lever 21 includes a pressing pin 21a (see FIGS. 12 and 13) that can contact the pressing portion 19b of the lock open bracket 19 that protrudes through the square hole 15a, and a wire engagement arm 21b. The torsion spring 21c is urged clockwise.
[0017]
  A memory rack 25 is fixed to the lower rail 16. The memory rack 25 is a long member parallel to the lower rail 16, and a plurality of memory lock holes 25a are formed along the longitudinal direction thereof. The memory rack 25 is a slide piece that is movable in its longitudinal direction.(Memory member)26, and a memory lock lever 28 is provided in the slide piece 26. The memory lock lever 28 is supported so as to be movable in the vertical direction of the seat, that is, in a direction perpendicular to the sliding direction of the slide piece 26 with respect to the memory rack 25, and a memory position (the memory lock lever 28a is engaged with the memory lock hole 25a). 5, 7 to 9, and 14) and a memory release position (FIG. 6) for releasing the engagement. The memory lock lever 28 has a catch protrusion 28 b located on the turning locus of the catch portion 20 a of the catch lever 20 and is urged to the memory position by the memory urging spring 27. The memory lock lever 28 and the slide piece 26 constitute a memory unit (slide memory mechanism) U for storing the slide position of the seat 11.
[0018]
A slide stopper 29 is fixed to the upper rail 15. The slide stopper 29 can be engaged with a stopper projection 26a that projects from the top of the slide piece 26 (see FIG. 15).
[0019]
Next, a support mechanism for the seat back 13 will be described with reference to FIGS. 16 to 22. In this embodiment, it has a memory function of storing an angular position before the seat back 13 is tilted forward. The clockwise direction and the counterclockwise direction appearing in the following description related to the seat back support mechanism mean the rotational directions in the side views of FIGS.
[0020]
As shown in FIG. 17, a pair of upper rail 15 and lower rail 16 are provided on the left and right sides of the seat 11, and a pair of left and right seat cushion frames 14 are provided correspondingly. Upper arms 40 and 60 are supported near the rear ends of the left and right seat cushion frames, respectively. A seat back frame (not shown) that forms a skeleton of the seat back 13 is fixed to the upper portions of the upper arms 40 and 60, and the angle of the seat back 13 changes according to the rotation of the upper arms. The upper arm 40 is rotationally biased in a direction in which the seat back 13 is tilted forward by a return spring (a seat back forward biasing means) 40a. The upper arm 60 is also urged to rotate in the forward direction of the seat back by a similar return spring (seat back forward biasing means) 60a.
[0021]
In FIG. 17, the left (vehicle outer) upper arm 40 is supported by the hinge pin 41 via the seat back lock mechanism R1, and the right (vehicle inner side) upper arm 60 is supported by the hinge pin 61 via the seat back lock mechanism R2. Yes. The hinge pins 41 and 61 are supported by the left and right seat cushion frames 14 so as to be rotatable about a common horizontal axis Hx, and are inserted at both ends of the connecting pipe 42. The connecting pipe 42 can rotate relative to the hinge pin 41 and cannot rotate relative to the hinge pin 61. An interlocking pin 41 a extends in the outer diameter direction on the relatively rotatable hinge pin 41, and the interlocking pin 41 a is inserted through a long hole 42 a formed in the circumferential direction of the connecting pipe 42.
[0022]
The seat back lock mechanism R1 on the upper arm 40 side includes a base arm 43 fixed to the seat cushion frame 14 side, a lock plate 44 supported to be rotatable relative to the base arm 43 about a horizontal axis Hx, and a base A movement lock member 45 supported so as to be movable in the radial direction about the horizontal axis Hx with respect to the arm 43, a cam member 46 that rotates together with the hinge pin 41 about the horizontal axis Hx, and a rotation with the cam member 46. A moving release plate 47 is provided. External teeth 45 a are formed on the outer edge of the movement lock member 45, and internal teeth 44 a that can be engaged with the external teeth 45 a are formed on the lock plate 44. The cam member 46 moves the moving lock member 45 in a direction in which the outer teeth 45a and the inner teeth 44a mesh with each other by rotation in the locking direction (a direction away from the horizontal axis Hx), and the cam member 46 in the unlocking direction opposite thereto. , The release plate 47 that rotates integrally with the cam member 46 moves the movement lock member 45 in a direction to release the engagement between the outer teeth 45a and the inner teeth 44a. The combined body of the cam member 46 and the release plate 47 is biased in the locking direction by a spring (not shown), and is rotated in the unlocking direction by rotating the reclining handle 48 that can be operated in the seated state. Can do.
[0023]
  A ratchet (engagement member) 50 is coupled to the lock plate 44 so as not to be relatively rotatable. The ratchet 50 is relatively rotatable about a horizontal axis Hx with respect to a circular hole formed in the upper arm 40. It is fitted. At the outer edge of the ratchet 50, a pair of memory recesses(Second recess)50a and one forward locking recess 50b are formed. A pole (engaging member) 51 is pivotally mounted on the upper arm 40 via a rotation shaft 51 x above the ratchet 50, and a pair of memory protrusions 51 a provided near the tip of the pole 51 are connected to the pair of ratchets 50. The memory recess 50a can be engaged and disengaged. The one memory protrusion 51a can engage with the forward tilt lock recess 50b when the seat back 13 (upper arm 40) is tilted forward. The pole 51 further has an interlocking pin 51b and a cam surface 51c.
[0024]
A release lever 52 is pivotally attached to the upper arm 40 by a rotation shaft 52x. The release lever 52 includes a pin insertion hole 52a, a sub arm 52b that rotates integrally with the release lever 52 body, a spring hook arm 52c, and a wire engagement arm 52d. The interlocking pin 51b of the pole 51 is inserted into the pin insertion hole 52a, and the cam surface 51c of the pole 51 is positioned on the rotation trajectory of the sub arm 52b. One end of a tension spring 52e is engaged with the spring hook arm 52c, and a walk-in wire 53 is connected to the wire engagement arm 52d. The other end of the tension spring 52e is connected to a bracket 54 that is fixed to the upper arm 40, and the release lever 52 is urged counterclockwise in FIG. 18 by the tension spring 52e. This urging direction is a direction in which the sub arm 52b pushes down the cam surface 51c. Therefore, when the release lever 52 is in the free state, the pawl 51 is engaged at the angular position where the memory protrusion 51a is engaged with the memory recess 50a by the urging force of the tension spring 52e. (FIG. 18).
[0025]
A walk-in operation handle 56 (FIGS. 1 and 2) is provided outside the seat back 13, and the walk-in wire 53 is pulled by operating the walk-in operation handle 56. The pulled walk-in wire 53 rotates the release lever 52 in the clockwise direction against the tension spring 52e.
[0026]
The seat back lock mechanism R2 on the upper arm 60 side has basically the same structure as the seat back lock mechanism R1. That is, the base arm 63 fixed to the seat cushion frame 14 side, the lock plate 64 supported so as to be rotatable relative to the base arm 63 about the horizontal axis Hx, and the horizontal axis Hx to the base arm 63. A movable lock member 65 supported so as to be movable in a radial direction with respect to the center, a cam member 66 that rotates about the horizontal axis Hx together with the hinge pin 41, and a release plate 67 that rotates together with the cam member 66 are provided. Yes. Outer teeth 65 a are formed on the outer edge of the movement lock member 65, and inner teeth 64 a that can be engaged with the outer teeth 65 a are formed on the lock plate 64. The cam member 66 moves the moving lock member 65 in the direction in which the outer teeth 65a and the inner teeth 64a mesh with each other by rotation in the locking direction (the direction away from the horizontal axis Hx), and the cam member 66 in the unlocking direction opposite thereto. , The release plate 67 that rotates integrally with the cam member 66 moves the movement lock member 65 in a direction to release the engagement between the outer teeth 65a and the inner teeth 64a. A combined body of the cam member 66 and the release plate 67 is urged in a locking direction by a spring (not shown).
[0027]
Unlike the upper arm 40 side, on the upper arm 60 side, the lock plate 64 and the upper arm 60 are coupled so as to rotate integrally without interposing a ratchet. Further, an interlocking lever 68 that rotates integrally is fixed to the hinge pin 61 (see FIGS. 17, 20, and 21), and the interlocking lever 68 is connected to the wire engagement arm 52 d of the release lever 52 by an interlocking wire 69. Has been.
[0028]
Further, a pulling lever 57 that is rotatable relative to the hinge pin 61 is supported on the upper arm 60 side. The pulling lever 57 has a pressed arm 57a and a wire engaging arm 57b, and one end of the pulling wire 58 is connected to the wire engaging arm 57b. The other end of the pulling wire 58 is connected to the wire engaging arm 21 b of the lock open lever 21. The pressed arm 57 a is located on the rotation locus of the upper hook 60 b fixed to the upper arm 60. As shown in FIGS. 17 and 20, the traction lever 57 is supported on the upper arm 60 side, but in order to make it easy to understand the operation state of the traction wire 58 by the traction lever 57, FIG. 18 and FIG. Also in FIG. 19, the pulling lever 57 is indicated by a virtual line (two-dot chain line).
[0029]
The operation of the seat device configured as described above will be described. A solid line in FIG. 1 indicates a normal seating state of the seat 11. At this time, the seat slide-related mechanism is in the state shown in FIG. 5, and the support mechanism for the seat back 13 (upper arm 40) is in the state shown in FIG. In this state, the slide lock plate 17 is held at the lock position, and the sliding of the seat 11 is regulated by the engagement between the lock claw 17a and the slide lock hole 16a (FIG. 12). The memory lock lever 28 is held at the memory position by the urging force of the memory urging spring 27, and the movement of the memory unit U with respect to the memory rack 25 is restricted by the engagement relationship between the memory lock claw 28a and the memory lock hole 25a. ing.
[0030]
On the other hand, in the support mechanism for the seat back 13, the external teeth 45a and 65a of the movement lock members 45 and 65 constituting the left and right seat back lock mechanisms R1 and R2 mesh with the internal teeth 44a and 64a of the lock plates 44 and 64, respectively. The rotation of the lock plates 44 and 64 is restricted. As shown in FIG. 18, on the upper arm 40 side, a pair of memory protrusions 51 a provided on the pole 51 are engaged with a pair of memory recesses 50 a of the ratchet 50 coupled to the lock plate 44. The release lever 52 is biased by a tension spring 52e in a direction in which the sub arm 52b presses the cam surface 51c, and the state in which the memory protrusion 51a engages with the memory recess 50a is maintained by the biasing force. That is, the lock plate 44, the ratchet 50, and the upper arm 40 (pole 51) are integrally locked so as not to rotate around the horizontal axis Hx. On the other hand, since the upper arm 60 is directly coupled to the lock plate 64, the upper arm 60 is also restricted from rotating together with the lock plate 64.
[0031]
First, the reclining adjustment operation of the seat back 13 will be described. When the reclining handle 48 is operated in the normal seating state, the cam member 46 is rotated in the unlocking direction via the hinge pin 41 on the upper arm 40 side, and the release plate 47 that rotates together with the cam member 46 locks the movement lock member 45 to the lock plate. 44 is moved in the meshing release direction (direction approaching the horizontal axis Hx). On the other hand, since the engagement state between the memory protrusion 51 a and the memory recess 50 a is maintained, the ratchet 50 is also integrated with the upper arm 40 via the pole 51. Therefore, the combined body of the lock plate 44, the ratchet 50 and the upper arm 40 can be rotated relative to the base arm 43 about the horizontal axis Hx.
[0032]
As indicated by a solid line in FIG. 22, the interlocking pin 41 a of the hinge pin 41 is in contact with one end 42 a 1 of the long hole 42 a of the connecting pipe 42 in the normal seating state. When the hinge pin 41 is rotated in accordance with the operation of the reclining handle 48, the interlocking pin 41a presses the abutting end portion 42a1 of the long hole 42a, and the connecting pipe 42 rotates together with the hinge pin 41. As the connecting pipe 42 is rotated, the hinge pin 61 on the upper arm 60 side is also rotated, and the cam member 66 and the release plate 67 are rotated in the unlocking direction. Thereby, the movement lock member 65 moves in the direction approaching the horizontal axis Hx, and the meshing between the outer teeth 65a and the inner teeth 64a of the lock plate 64 is released. That is, the combined body of the lock plate 64 and the upper arm 60 can be rotated relative to the base arm 63 about the horizontal axis Hx.
[0033]
As a result of the operation of the reclining handle 48, the lock is released by both the upper arms 40 and 60 as described above, so that the tilt angle of the seat back 13 can be arbitrarily adjusted. After the adjustment, if the operation on the reclining handle 48 is released, the upper arms 40 and 60 are again locked.
[0034]
Subsequently, a normal seat slide operation in which the seated person arbitrarily adjusts the position of the seat 11 in the front-rear direction will be described. When the loop handle 18b is lifted upward in the normal seating state, the loop bracket 18 rotates clockwise from the position of FIG. 5 to the position of FIG. 6, and the pressing portion 18a presses the pressed portion 19a to lock the open bracket. 19 is rotated clockwise. With the rotation of the lock open bracket 19, the pressing portion 19b presses the pressed arm 17b, and the slide lock plate 17 rotates to the unlock position against the lock urging spring 17c (see FIG. 13). Thereby, the slide regulation of the upper rail 15 with respect to the lower rail 16 is released. In addition, the stopper lever 22 is rotated clockwise together with the loop bracket 18, and the catch lever 20 coupled via the torsion spring 20b is rotated clockwise. Then, the catch portion 20a of the catch lever 20 engages with the catch protrusion 28b and pushes downward, thereby moving the memory lock lever 28 from the memory position to the memory release position. Thereby, the slide restriction of the memory unit U with respect to the memory track 25 is released. Therefore, when the seat 11 (upper rail 15) is moved with respect to the lower rail 16 as indicated by a two-dot chain line in FIG. 1, the memory unit U also slides with the entire seat 11. When the hand is released from the loop handle 18b, the slide lock plate 17 returns and rotates to the lock position and the seat 11 is locked. At the same time, the memory lock lever 28 returns to the memory position.
[0035]
Next, the walk-in operation will be described. When the walk-in operation handle 56 is operated from the normal seating state, the walk-in wire 53 is pulled, and the release lever 52 rotates clockwise from the position of FIG. 18 against the tension spring 52e. Then, the pin insertion hole 52a lifts the interlocking pin 51b, and the pole 51 is rotated counterclockwise in the figure, and the engagement between the memory protrusion 51a and the memory recess 50a is released. As a result, the coupling relationship between the ratchet 50 and the upper arm 40 is released, and the upper arm 40 is rotatable relative to the ratchet 50.
[0036]
When the release lever 52 rotates, the interlocking wire 69 is pulled and the interlocking lever 68 rotates clockwise in FIG. 20, and the hinge pin 61 coupled to the interlocking lever 68 is rotated in the same direction. The rotation of the hinge pin 61 is similar to that in the above-described reclining, and the cam member 66 and the release plate 67 are rotated in the direction in which the external teeth 65a of the movement lock member 65 and the internal teeth 64a of the lock plate 64 are released. Therefore, the lock of the seat back lock mechanism R2 is released, and the upper arm 60 can be rotated. On the other hand, the connecting pipe 42 rotates together with the hinge pin 61. At this time, the long hole 42a of the connecting pipe 42 moves relative to the interlocking pin 41a in the rotational direction (the long hole 42a slides on the interlocking pin 41a). The force in the rotating direction is not transmitted to the interlocking pin 41a. That is, the interlocking pin 41a relatively moves from the one end portion 42a1 to the other end portion 42a2 side of the long hole 42a as shown by a one-dot chain line in FIG. Therefore, the hinge pin 41 is not rotated, and the lock inside the seat back lock mechanism R1 is not released. In other words, the ratchet 50 remains in a state where the rotation is restricted.
[0037]
In the present embodiment, a mechanism for controlling the interlocking of the left and right seat back lock mechanisms R1 and R2 during reclining and walk-in (when the reclining position is stored), the interlocking pin 41a on the hinge pin 41 side as described above. And a long hole 42a on the connecting pipe 42 side, the structure is simple. Such interlocking control is performed by a plurality of levers in the conventional sheet apparatus, and this embodiment has a smaller number of parts than the conventional apparatus, and can reduce the manufacturing cost and increase the accuracy.
[0038]
When the above-described unlocking is performed at the left and right upper arms 40 and 60, the seat back 13 starts to tilt forward by the urging force of the return springs 40a and 60a. Since the ratchet 50 does not rotate during the forward tilting operation, the pole 51 moves along the outer edge of the ratchet 50 as the seat back 13 rotates forward. When the seat back 13 reaches the forward tilt position indicated by the alternate long and short dash line in FIG. 2, one of the pair of memory protrusions 51 a provided on the pole 51 on the side close to the rotation shaft 51 x is ratchet 50 as shown in FIG. 19. The forward tilt lock recess 50b is engaged. The tension spring 52e applies an urging force to the pawl 51 in the engagement maintaining direction of the memory protrusion 51a and the forward tilt lock recess 50b.
[0039]
When the upper arm 60 tilts forward, the upper hook 60b presses the pressed arm 57a of the traction lever 57 and rotates it counterclockwise. Then, the wire engaging arm 57b pulls the pulling wire 58 and rotates the lock open lever 21 counterclockwise from the position of FIG. 5 to the position of FIG. 7 against the torsion spring 21c. When the lock open lever 21 rotates counterclockwise, the pressing pin 21a presses the pressing portion 19b downward, and the lock open bracket 19 rotates clockwise. The slide lock plate 17 is rotated to the unlock position against the spring 17c (FIG. 13). In FIG. 13, the pressing pin 21 a of the lock open lever 21 does not press the pressing portion 19 b of the lock open bracket 19, but this is the case of the above-described normal slide operation, and in the walk-in operation, the pressing pin 21 a is illustrated in FIG. It moves below the position 13 and presses the pressing portion 19b. At this time, since the pressed portion 19a of the lock open bracket 19 is separated (escapes) from the pressing portion 18a, the loop bracket 18 does not rotate, and the stopper lever 22 and the catch lever 20 do not rotate. If the catch lever 20 is not rotated, the memory lock lever 28 is not moved from the memory position. That is, the entire seat 11 (upper rail 15) is slidable with respect to the lower rail 16, but the memory unit U is not movable relative to the memory rack 25 as shown in FIG.
[0040]
The upper rail 15 is urged forward by a slide urging spring (not shown). When the slide lock plate 17 is rotated to the unlock position as a result of the walk-in operation, the upper rail 15 is moved forward with respect to the lower rail 16 as shown in FIG. Slide to. At this time, the memory unit U remains fixed at a position before the sheet 11 moves. This is the walk-in state indicated by the two-dot chain line in FIG.
[0041]
When returning from the walk-in state, the seat 11 is slid backward. Then, as shown in FIG. 9, the slide stopper 29 comes into contact with the stopper projection 26 a of the slide piece 26, and the sheet 11 can no longer be retracted. Since the slide piece 26 has not moved from the beginning of the walk-in operation, the retreat restriction position is the stored seat position. When the seat back 13 is raised from the forward tilted position, the pulling wire 58 is relaxed and the lock open lever 21 returns to the normal seating position shown in FIG. 5, and the lock open bracket 19 is pressed accordingly. The pressing state on the arm 17b is released, the slide lock plate 17 returns to the lock position, and the seat 11 is fixed.
[0042]
When the seat back 13 is raised, the left and right seat back locking mechanisms R1 and R2 also return to the normal seating state described above. Specifically, the seat back lock mechanism R1 on the upper arm 40 side was originally locked (the inner teeth 44a of the lock plate 44 are engaged with the outer teeth 45a of the movement lock member 45), but the upper arm 40 is not tilted forward. Is returned to the angular position, the pole 51 moves to a position where the pair of memory protrusions 51 a correspond to the pair of memory recesses 50 a of the ratchet 50. Then, the pole 51 can be rotated in the clockwise direction in FIG. 18, so that the release lever 52 urged by the tension spring 52e is rotated in the counterclockwise direction in FIG. The pole 51 is pressed to rotate the pole 51 to a position where the pair of memory protrusions 51a and the pair of memory recesses 50a are engaged. As a result, the relative rotation of the ratchet 50 and the pole 51 is restricted, and the upper arm 40 cannot be tilted with respect to the base arm 43. Since the ratchet 50 has not been rotated from the beginning of the walk-in operation, the rotation restriction position is the angle of the seat back 13 stored. Further, when the pawl 51 rotates in the direction in which the pair of memory protrusions 51a are engaged with the pair of memory recesses 50a (clockwise direction in FIG. 18), the release lever 52 presses the pawl 51 and the memory protrusion 51a and the memory The interlock wire 69 is loosened in response to the rotation of the release lever 52, although it is rotated in a direction for promoting the engagement of the recess 50a (counterclockwise in FIG. 18). When the interlocking wire 69 is relaxed, the pulling force on the interlocking lever 68 is released, so that the cam member 66 constituting the seat back locking mechanism R2 on the upper arm 60 side can be rotated in the locking direction. Then, the cam member 66 is rotated in the locking direction by an urging force of a spring (not shown) to move the moving lock member 65 in a direction away from the horizontal axis Hx, and the external teeth 65a of the moving lock member 65 are moved to the lock plate 64. It meshes with the internal teeth 64a. As a result, the seat back locking mechanism R2 on the upper arm 60 side is locked.
[0043]
As can be understood from the above description of the walk-in operation, the forward tilting / returning operation of the seat back 13 and the slide lock of the seat 11 are linked, and if the seat back 13 is tilted forward, the slide lock is released and caused. Slide lock state. Therefore, after performing the walk-in operation, the seat 11 is fixed if the seat back 13 is raised without having to retract the seat 11 to the storage position shown in FIG. 9, but such an operation was performed unintentionally. In this case, the slide memory function is not used effectively. Conversely, if the front seat cannot be fully retracted due to the luggage placed in the rear seat as a result of the walk-in operation, the seat back 13 knows that it has not returned to the memorized position. In such a case, it is desirable to apply the slide lock without returning to the memorized position. It is possible to raise the seat back when the seat is not retracted to the memorized position, but there is a seat device that does not lock the slide, but it can be seated in an unstable state without being locked. Therefore, it is not preferable as a driver seat from the viewpoint of safety.
[0044]
In the seat apparatus according to the present embodiment, in order to satisfy the above-described requirements, an operation system that prompts the seat back 13 to be triggered after the seat 11 is normally retracted to the stored position is stored. When the seat back cannot be retracted (do not dare), a slide lock is applied according to the raising of the seat back 13 to ensure safety. As described above, when the seat back 13 is tilted forward, one of the pair of memory protrusions 51 a provided on the pole 51 close to the rotation shaft 51 x engages with the forward tilt lock recess 50 b of the ratchet 50. This engagement is indirectly held by the urging force of the tension spring 52e. When the upper arm 40 is caused to rotate in the direction (clockwise) from the state shown in FIG. 19, the seat back 13 is moved to the forward tilt position. In addition to the return springs 40a and 60a that are urged, a resistance is provided by the engagement between the forward tilt lock recess 50b and the memory protrusion 51a. The magnitude of this resistance is such that the seat back 13 is not raised when the seat back 13 is gripped when the seat 11 is to be retracted, and the upper arm 40 is rotated when the seat back 13 is rotated with the intention of causing it. It is set to allow rotation. For example, the seat back 13 is originally biased forward by the return springs 40a and 60a, but the magnitude of the resistance caused by the forward tilt lock recess 50b and the memory protrusion 51a is at least the resistance caused by the return springs 40a and 60a. It is set to be greater than the force. The magnitude of the cause resistance can be set and changed depending on factors such as the shape and number of the forward tilt lock recess 50b and the memory protrusion 51a, and the magnitude of the biasing force of the tension spring 52e.
[0045]
  When the sheet 11 is retracted to the stored position and the slide stopper 29 comes into contact with the stopper projection 26a, the retracting operation of the sheet 11 is locked. Since the raising operation with respect to the seat back 13 includes a component of the operating force toward the rear, the locking portion(Abutting location of slide stopper 29 and stopper projection 26a)This causes a fulcrum to receive resistance and makes it easier to raise the seat back 13 than when the seat 11 is free to slide. When a predetermined triggering force is applied to the seat back 13, the pawl 51 is retracted and rotated counterclockwise, and the memory protrusion 51a is detached from the forward tilt lock recess 50b. Thereafter, as described above, the upper arm 40 (and 60) rotates in the standing direction, the memory protrusion 51a engages with the memory recess 50a at the stored angle, and the seat back 13 is locked.
[0046]
  23 and 24 show a second embodiment of the present invention. This embodiment is different from the first embodiment only in the forward tilt holding mechanism that provides resistance to the raising of the seat back 13, and the other parts are common to the first embodiment. Members common to the first embodiment are denoted by the same reference numerals. The ratchet 70 has only a pair of memory recesses 70a on the outer edge portion, and a portion like the forward tilt lock recess 50b in the first embodiment is not formed. Instead, the upper arm 40 has a spring engaging projection (engaging member)., Fixed engagement member) 71 projecting from the bracket 72 fixed to the seat cushion frame, a forward tilt holding spring (engaging member), Movable engagement member73) is supported. The forward tilt holding spring 73 includes a long arm 73a protruding from the bracket 72 so as to be elastically deformable, and a short arm 73b that supports elastic deformation of the long arm 73a, and the long arm 73a is spring-engaged. A protrusion engaging portion 73c that is bent in a step shape and is located on the rotation locus of the protrusion 71 is formed. In the seat back (upper arm 40) standing state of FIG. 23, the spring engagement protrusion 71 is separated from the forward tilt holding spring 73. When the seat back 13 is tilted forward as shown in FIG. The long arm 73a is elastically deformed to engage with the protrusion engaging portion 73c. The protrusion engaging portion 73c of the forward tilt holding spring 73 is a return spring that urges the seat back to the forward inclined position with respect to the movement of the spring engaging protrusion 71 in the clockwise direction of FIG. The shape and the urging force are set so as to give a predetermined resistance independently of 40a (60a). That is, the forward tilt holding spring 73 and the spring engaging projection 71 function as a seat back forward tilt holding mechanism, similar to the forward tilt lock recess 50b and the memory projection 51a of the first embodiment.
[0047]
  25 to 27 show a third embodiment of the present invention. This embodiment is a lower rail(16)The seat slide structure is substantially the same as that of the first embodiment. When the seat back (13) is tilted forward, the lock open lever 21 is rotated in the unlocking direction (counterclockwise) by the pulling wire 58. On the other hand, the mechanism for holding the seat back in a forward tilted state has the following structure. The upper arm 80 is a member corresponding to the upper arm 60 of the first embodiment, and is a stopper plate (engaging member) that rotates integrally., Fixed engagement member81). In the vicinity of the upper arm 80, there is a rotating shaft 82x parallel to the horizontal axis Hx.,Pole (engaging member, Movable engagement member, swing member, first swing member82) Seat cushion frameCan swing againstIt is pivotally attached. The pole 82 has a stopper recess 82a that can be engaged with the stopper edge 81a of the stopper plate 81 at one end, and is urged to rotate in the engagement direction (clockwise) by the torsion spring 83. One end of the interlocking wire 84 is connected to the vicinity of the stopper recess 82a, and the other end of the interlocking wire 84 is connected to the memory plate.(Second swing member)It is connected to 85 wire engaging arms 85a. The memory plate 85 is moved to the upper rail by a rotation shaft 85x parallel to the horizontal axis Hx.Can swingPivoted and slide piece(Memory member)A release arm 85 b that can be engaged with the release step portion 86 a of 86 is extended. The slide piece 86 is a member that functions in the same manner as the slide piece 26 described above. The memory plate 85 is urged to rotate counterclockwise by a rotation urging spring 85c (shown only by an arrow in the figure).
[0048]
  In the phase of the stopper plate 81 and the pole 82 shown in the normal seating state of FIG. 25, the stopper edge 81a and the stopper recess82aIs not engageable. Further, the release arm 85b is engaged with the release step portion 86a of the slide piece 86, and the memory plate 85 is pushed in the clockwise direction against the rotation biasing spring 85c. When the walk-in operation is performed from this state, first, the upper arm 80 (seat back) tilts forward counterclockwise about the horizontal axis Hx, and the angle of the stopper plate 81 changes, so that the stopper edge 81a and the stopper recess82aAre in phase. Further, as the seat back is tilted forward, the lock open lever 21 is rotated to release the slide lock of the seat, and the seat slides forward leaving the slide piece 86 (memory unit). As the seat slides forward, the release arm 85b moves away from the release step portion 86a of the slide piece 86 as shown in FIG. 26, and the memory plate 85 is rotated counterclockwise by the biasing force of the rotation biasing spring 85c. Rotate. The interlocking wire 84 is loosened by the rotation of the memory plate 85, and the pole 82 is rotated clockwise by the biasing force of the torsion spring 83, so that the stopper recess82aEngages with the stopper edge 81a. Stopper recess82aDue to the engagement relationship between the stopper edge 81a and the stopper edge 81a, a resistance different from that of the return spring 80a for urging the seat back to the forward tilt position is applied to the clockwise rotation for raising the upper arm 80. . In this state, a larger force than usual is required to cause the seat back.
[0049]
  When the seat is retracted and the return operation from the walk-in is performed, the release arm 85b comes into contact with the release step 86a of the slide piece 86, and the memory plate 85 resists the rotation biasing spring 85c as shown in FIG. Is rotated clockwise. Then, the interlocking wire 84 is pulled and the pole 82 is rotated counterclockwise against the torsion spring 83, and the stopper recess82aReleases the engagement with the stopper edge 81a. As a result, the resistance caused by the pole 82 is eliminated, and the seat back can be easily raised.
[0050]
  The third embodiment is similar to the previous two embodiments in that when the seat back is tilted forward, it is caused by the forward tilt holding mechanism to give resistance, but the seat is retracted to the memorized position. The difference is that sometimes the resistance is automatically released. In this embodiment, since the force required for causing the seat back is small, the operability is improved. From the same point of view, also in the first and second embodiments, it is possible to automatically release the holding by the forward tilt holding mechanism when the sheet is retracted to the memory position. For example, in the first embodiment, an interlocking mechanism that forcibly rotates the pole 51 in a direction in which the engagement between the memory protrusion 51a and the forward tilt lock recess 50b is released using the retracting operation of the seat may be added. AlsosecondIn the embodiment, an interlocking mechanism that elastically deforms the forward tilt holding spring 73 in a direction in which the engagement between the protrusion engaging portion 73c and the spring engaging protrusion 71 is released using the retracting operation of the seat may be added. .
[0051]
As can be seen from the description of the above embodiments, the seat device of the present invention is caused by the engagement of the engaging member when the seat is tilted forward, separately from the biasing means for biasing the seat back in the forward tilt position direction. Since the forward tilt holding mechanism that provides the rotational resistance in the direction is provided, the possibility that the seat back is inadvertently caused when returning from the walk-in state and the slide lock is applied before the memory position is reduced. That is, the slide memory mechanism is effectively used. In addition, in the present invention, the interlocking relationship between the seat back and the slide lock is maintained, so that when the seat back needs to be raised and seated before the slide memory position, the seat lock can be surely locked and the safety is ensured. The nature is high.
[0052]
However, the present invention is not limited to the above embodiment. For example, the seat of the first embodiment has a reclining mechanism of a type that stores the angle of the seatback before being tilted forward, but is a seat of a type that does not include this type of memory function in the reclining mechanism. The present invention is also applicable. Furthermore, a seat apparatus that does not have a reclining function can be applied as long as the seat back has at least a forward tilted state and an upright state.
[0053]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain a vehicle seat device capable of effectively utilizing the slide memory function while reliably functioning the slide lock regardless of the slide position when sitting.
[Brief description of the drawings]
FIG. 1 is a side view showing a normal seating state and a forward sliding state of a vehicle seat device to which the present invention is applied.
FIG. 2 is a side view showing a walk-in operation state of the seat apparatus.
FIG. 3 is an exploded perspective view of a seat slide mechanism of the seat device.
FIG. 4 is a side view of a seat slide mechanism of the seat device.
FIG. 5 is a side view showing a seat slide mechanism in a normal seating state.
FIG. 6 is a side view of the seat slide mechanism in a normal slide state.
FIG. 7 is a side view of the seat slide mechanism immediately after the walk-in operation is performed.
FIG. 8 is a side view showing a seat slide mechanism in a walk-in state in which a seat is slid forward while leaving a memory unit.
FIG. 9 is a side view of the seat slide mechanism when the seat is retracted from the walk-in state to the memory position.
10 is a cross-sectional view taken along line AA in FIG.
11 is a cross-sectional view taken along line BB in FIG.
12 is a cross-sectional view of the slide lock state taken along the line CC of FIG.
13 is a cross-sectional view of the slide lock released state along the line C′-C ′ of FIG. 7;
14 is a cross-sectional view taken along the line DD in FIG. 5. FIG.
15 is a cross-sectional view taken along line EE of FIG.
FIG. 16 is an exploded perspective view of a seat back support mechanism.
FIG. 17 is a rear view of the seat back support mechanism.
FIG. 18 is a side view of one upper arm.
19 is a view showing a state where the upper arm of FIG. 18 is rotated to a forward tilt position.
FIG. 20 is a side view of the other upper arm.
FIG. 21 is an exploded perspective view of a mechanism for connecting left and right upper arms.
22 is a conceptual diagram showing the relationship between the interlocking pin and the long hole in the connection mechanism of FIG.
FIG. 23 is a side view showing a state where the seat back is raised in the seat device according to the second embodiment of the present invention.
FIG. 24 is a side view showing a state in which the seat back of the seat apparatus is tilted forward.
FIG. 25 is a side view showing a normal seating state of the seat device in the third embodiment of the present invention.
FIG. 26 is a side view showing a walk-in state of the seat device.
FIG. 27 is a side view showing a state where the seat apparatus is returned from the walk-in.
[Explanation of symbols]
R1 R2 Seat back lock mechanism
U Memory unit (slide memory mechanism)
11 sheets
12 Seat cushion
13 Seat back
15 Upper rail
16 Lower rail
17 Slide lock plate
19 Lock open bracket
20 Catch lever
21 Lock open lever
25 Memory rack
26 slide pieces(Memory member)
27 Memory bias spring
28 Memory lock lever
40 60 80 Upper arm
40a 60a 80a Return spring
41 61 Hinge pin
41a interlocking pin
42 Connecting pipe
42a long hole
50 Ratchet (engaging member)
50a Memory recess(Second recess)
50b Inclined locking recess
51 Pole (engagement member)
51a Memory protrusion
52 Release lever
52e Tension spring
70 Ratchet
71 Spring engagement protrusion (engagement member, Fixed engagement member)
73 Forward tilt holding spring (engagement member, Movable engagement member)
73c Projection engaging part
81 Stopper plate (engagement member, Fixed engagement member)
81a Stopper edge
82 Pole (engaging member, Movable engagement member, swing member, first swing member)
82a Stopper recess
84 Linking wire
85 Memory plate(Second swing member)
85b Release arm
86 slide piece(Memory member)
86a Release step

Claims (8)

A lower rail on the floor side and an upper rail which is slidable relative to the lower rail and fixed to the seat side;
A seat cushion supported by the upper rail and moving in a sliding direction together with the upper rail;
A seat back that is rotatably supported by the seat cushion in a seatable standing position and a forward tilt position;
A slide lock mechanism in which sliding of the upper rail with respect to the lower rail is restricted when the seat back is in the standing position and unlocking is permitted when the seat back is in the forward tilt position; and the seat back is tilted forward A slide memory mechanism that stores the position of the seat at the time of movement and restricts movement of the seat to the rear of the storage position;
In a vehicle seat device comprising:
Provided tilting holding mechanism before have the engaging member to disengage at engaging the standing position in front tilting position of the seat back,
When the seat back is moved forward from the walk-in state in which the seat back is tilted forward and the seat is moved forward with respect to the storage position by the slide memory mechanism, the forward tilt holding mechanism is moved to the engagement member. When the seat back is restrained from being moved backward from the walk-in state, the seat back is restrained from being moved back to the standing position. The vehicle seat device is characterized in that the engagement of the engaging member of the forward tilt holding mechanism is released by applying the movement . 2. The vehicle seat device according to claim 1, wherein the slide memory mechanism moves in a sliding direction together with a seat with respect to the lower rail when the seat back is in an upright position, and moves relative to the lower rail when the seat back is tilted forward. A vehicle seat device that has a memory member that stores the original seat position when the seat is restricted and the seat moves back to the storage position from the walk-in state, and the backward movement is restricted by contacting the memory member. The vehicle seat device according to claim 1 or 2, wherein the forward tilt holding mechanism includes:
A ratchet that is supported so as to be rotatable relative to the seat back about the pivot axis of the seat back, and that does not rotate when the seat back is tilted forward and changes a relative angle with the seat back;
Forward tilt lock recess formed in the outer edge of the ratchet;
A pole supported so as to be movable with respect to the seat back so that it can be engaged with and disengaged from the forward tilt lock recess of the ratchet when the seat back is tilted forward ; and engagement of the pole with the forward tilt lock recess of the ratchet A biasing member biasing in the direction;
A vehicle seat device comprising: The vehicle seat device according to claim 3, the outer edge of the ratchet, apart from the forward tilting locking recess which constitutes the anteversion holding mechanism, a to the pole and engaging with raised upright location of the seat back A vehicle seat device having two recesses . The vehicle seat device according to claim 1 or 2, wherein the forward tilt holding mechanism includes:
A fixed engagement member provided on the seat back side; and a movable engagement member provided on the seat cushion side, which engages with the fixed engagement member when the seat back is tilted forward and is movable in a direction to release the engagement. Joint members;
A vehicle seat device comprising: 6. The vehicle seat device according to claim 5, wherein the movable engagement member on the seat cushion side includes a holding spring that is elastically deformable in a state of holding the fixed engagement member and a state of releasing the holding. . 6. The vehicle seat device according to claim 5, wherein the movable engagement member on the seat cushion side includes a swinging member swingable between an engagement position and a disengagement position with respect to the fixed engagement member. A vehicle seat device having a biasing member that biases the moving member toward the engagement position. The vehicle seat device according to claim 2, wherein the forward tilt holding mechanism includes:
A fixed engagement member provided on the seat back side;
A first swinging member provided on the seat cushion side, positioned at an engagement position with the fixed engagement member when the seat back is tilted forward, and swingable in a direction to release the engagement;
A biasing member that biases the first swing member toward the engagement position;
In addition,
When the seat moves in the sliding direction together with the seat and has a second swinging member that swings in conjunction with the first swinging member, and the seat moves from the walk-in state to the storage position by the slide memory mechanism, The second oscillating member is rotated in contact with the memory member, and the first oscillating member is forcibly rotated to the disengagement position with the fixed engagement member against the biasing member. Vehicle seat device to be moved.

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