WO2004028855A1

WO2004028855A1 - Walk-in device for motor-vehicle seat

Info

Publication number: WO2004028855A1
Application number: PCT/JP2003/009661
Authority: WO
Inventors: Koji Tashiro
Original assignee: Johnson Controls Automotive Systems Corporation
Priority date: 2002-09-26
Filing date: 2003-07-30
Publication date: 2004-04-08
Also published as: AU2003252730A1; JP2004114853A; JP4121817B2

Abstract

A walk-in device for a motor-vehicle seat comprises the following: a fixed rail (3) fixed on a floor, a movable rail (4) that is installed on the fixed rail (3) in a manner slidable in a forward/backward direction and to which the seat is fixed, an operation rod (8) that is for adjusting the position of the seat in a forward/backward direction and has a crank section (17), a memory latch (20) rotatably provided on the operation rod (8) at the rear of the crank section (17), a memory rod (21) extending from the memory latch (20) parallel to the crank section (17) of the operation rod (8), a walk-in lever (27) capable of, when the seatback of a seat is tipped forward, moving the crank section (17) of the operation rod (8) and the memory rod (21) together and rotating the operation rod (8) and the memory latch (20) together, and a memory block (19) installed on the fixed rail (3) in a manner slidable in a forward/backward direction and having a hook section (43) that can be released from engagement with the memory latch (20) by rotating the memory latch (20).

Description

Walk-in device for automotive seats

Technical field

The present invention relates to a walk-in device for a vehicle seat. In particular, it is applied to front seats in two-door vehicles and second seats in vehicles with three-row seats such as vans and wagons, enabling the seat to move forward in conjunction with the forward knock of the seat knock. Walk-in device. Landscape technology

Some automobile seats are equipped with a walk-in device that allows the front seat to move forward in order to make it easier for passengers to get in and out of the liar seat.

Japanese Unexamined Patent Publication No. Hei 9—3,151,900 discloses that when the seat back of the front seat is moved forward, the slide lock that fixes the front and rear positions of the seat is automatically released, and the entire seat is moved forward. Discloses a walk-in device that can be moved to a vehicle.

This walk-in device has an interlock mechanism for holding the released slide lock in that state. This release state is maintained even after raising the sheet pack to return the sheet to its original position after the forward movement of the sheet.

When the seat is moved backward after raising the sheet pack, the tip of the memory lever of the interlock mechanism interferes with the memory block fixed at the predetermined position (neutral position) of the fixed rail during the movement. Then, the memory lever rotates. As a result, the unlocked state of the slide lock is released, and the seat is locked again at the predetermined neutral position.

However, in this device, when the seat is moved backward by causing the seat back, the seat is always re-mouthed only at the fixed neutral position. If this neutral position is different from the seat position immediately before moving forward, that is, the original seat position that was adjusted to the optimal position for the occupant, it is necessary to always adjust the seat position after moving the seat forward. . This position adjustment of the seat requires an operation to manually release the slide lock and move the sheet from the re-opening position to the original sheet position, which is troublesome. Disclosure of the invention

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to always re-lock the seat position regardless of the position of the seat immediately before moving forward. And a walk-in device for a vehicle seat.

In order to achieve the above object, according to one embodiment of the present invention, a movable rail on which a seat is fixed is slidably mounted on a fixed rail fixed to a floor, and a plurality of lock holes are formed along a longitudinal direction of the fixed rail. The movable rail is provided with a slide latch that supports an operation rod that is rotatable about an axis on the movable rail and that engages with the lock hole to lock the movable rail at an arbitrary front-rear position. An interlock mechanism is provided in the vehicle, and a pressing piece formed on the quake lever of the interlock mechanism pushes a crank portion formed on the operation rod when the seat back is tilted forward to unlock the operation rod. And the interlock mechanism locks the slide latch in the unlocked state, and the movable rail moves. In the process of moving the movable rail forward and moving the movable rail forward and causing the seat back to move backward, the memory lever of the interlock mechanism hits the memory block attached to the fixed rail and the interlock mechanism The interlock is released when the lock release state of the slide latch is released, the slide latch engages with the lock hole, and the movable rail is re-opened at the position specified by the lip lock. And a biasing means for rotatably attaching the upper and lower portions of the memory latch to the operation rod and rotating the lower end of the memory latch toward the fixed rail. A memory rod is provided at the upper end of the memory latch, which is pushed together with a crank of the operating rod by a pressing piece of a power lever, so that the memory block attached to the fixed rail is slidable back and forth. The lock engages with the lower end of the memory latch when the lock is off, and can be released by rotating the lower end of the memory latch away from the fixed rail. The hook section is provided. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view showing a pair of left and right inner and outer slide rails according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a slide rail on the autter side in FIG.

FIG. 3 is a perspective view showing the structure of the slide rail on the auter side when viewed from the direction of arrow m in FIG.

FIG. 4 is a view of the hook of the slide rail of FIG. 2 as viewed from below. This shows a state in which the lower end of the memory latch is engaged with the hook.

FIG. 5 is a perspective view showing a main part of the interlock mechanism of the slide rail of FIG. FIG. 6 is an exploded view of the interlock mechanism of FIG.

FIG. 7 is a plan view showing the interlock mechanism of FIG. 5 in an interlock off state.

FIG. 8 is a plan view showing a state in which the walk-in lever is rotated by a cable interlocking with the forward movement of the seat back in the interlock mechanism of FIG. FIG. 9 is a plan view showing the interlock mechanism of FIG. 5 in an interlock-on state. This shows a state in which the cam pins are engaged with the cam holes, and the disengagement of the slide latch and the memory latch is maintained.

Fig. 10 shows the interlock mechanism of Fig. 7, where the tip of the memory lever is

FIG. 9 is a plan view showing a state in which it rotates after interfering with the front end of the circle. FIG. 11 is a front view showing a state in which the left and right operation ports of FIG. 1 are connected by a transmission wire.

FIG. 12 is a cross-sectional view of the autter-side slide rail of FIG. This shows a state where the slide latch and the memory latch are engaged with the hook hole and the hook portion, respectively.

FIG. 13 is a cross-sectional view of the autter-side slide rail of FIG. This shows a state where only the crank part of the operating rod has rotated.

FIG. 14 is a cross-sectional view of the autter-side slide rail of FIG. This shows a state in which both the crank portion and the memory rod are rotated by being pushed by the pressing piece of the walk-in lever. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a pair of left and right slide rails 1 and 2 that support the front seat on the passenger side so as to be movable in the front-rear direction with respect to the floor. The slide rail 1 extends on the inside in the vehicle width direction (left side in the figure, hereinafter referred to as the inner side), and the slide rail 2 extends on the outside in the vehicle width direction (right side in the figure, hereinafter referred to as the auta side). .

Both slide rails 1 and 2 have a basic structure in which a movable rail 4 fixed to a known seat (not shown) is slidably mounted on a fixed rail 3 fixed to a known floor (not shown). Inside each movable rail 4 ', operating rods 7, 8 extending forward and backward along the movable rail 4 are rotatable via a pair of front and rear brackets 5, 6 fixed to the movable rail 4. It is supported by. An operation handle 9 for manual operation is formed at a front end (a lower end in FIG. 1) of the operation rod 7 on the inner side. The bracket 6 supporting the rear part of the operating rods 7 and 8 (upper part in FIG. 1) exposes a part of the operating rods 7 and 8. A slide latch 10 extending downward from the rods 7, 8 is welded to the exposed portions of the rods 7, 8. The slide latch 10 has, at its lower end, an engagement claw that engages with a plurality of lock holes 11 formed in parallel on the side surface of the fixed rail 3. The slide latch 10 rotates around the axis of the rod 7, When the engaging claw is engaged with the lock hole 11 of the fixed rail 3, the movable rail 4, that is, the front and rear position of the sheet is locked. The rear ends of the operation ports 7 and 8 are provided with springs 12 that constantly bias the slide latch 10 in the direction of engaging the slide latch 10 with the lock hole 11.

At the front of the operation ports 7 and 8, a projection 13 extending substantially upward from the operation ports 7 and 8 and a projection 14 extending substantially downward are formed. The extending angles of these protruding pieces 13 and 14 to the operating rods 7 and 8 are different from each other. As shown in FIG. 11, the end of the projection 13 of the inner operation port 7 is connected to the end of the projection 14 of the outer operation port 8 by a transmission wire 15. ing. The end of the projection 13 of the inner operation rod 8 is connected to the end of the projection 14 of the inner operation rod 7 by a transmission wire 16. To these two transmission wires 15 and 16, the rotational force applied to either the inner operation rod 7 or the gear side operation rod 8 acts as a “pulling force”. Since the transmission shafts 15 and 16 cross each other, the operation rods 7 and 8 rotate in association with each other in opposite directions.

The above structure is common to the slide rails 1 and 2 on the inner and outer sides. However, the slide rail 2 on the outer side further has a substantially intermediate position of the operating rod 8 as shown in FIGS. 2 and 3. Special parts such as the crank part 17 formed in the part, the interlock mechanism 18 attached to the position corresponding to the crank part 17 of the movable rail 4, the memory block 19, the memory latch 20 and the memory rod 21 Structure has been added.

The crank part 17 of the operating rod 8 is configured such that the part of the operating rod 8 between the support parts of the brackets 5 and 6 is rotated in a state where the slide latch 10 is engaged with the lock hole 11. It is formed so as to be located more obliquely inside and above. When the crank 17 at this position is pushed toward the movable rail 4, the operating rod 8 rotates against the spring 12, and the slide latch 10 is disengaged from the lock hole 11. .

The interlock mechanism 18 is fixed at a position corresponding to the crank portion 17 of the movable rail 4, and is supported by a base plate 22 extending inward. Base plate As shown in Fig. 6, 22 has a relatively large diameter shaft hole 23 at the approximate center, a relatively small diameter shaft hole 24 at the inner end, and fixed to the movable rail 4. A slit 25 extending forward and backward, and a long hole 26 extending in an arc around the shaft hole 24 at a portion behind the shaft hole 23 and outside the shaft hole 24 are formed. Is formed.

A walk-in lever 27 is rotatably mounted on the upper surface of the base plate 22 around the axis of the rivet 28 by a rivet 28 inserted into the shaft hole 23 from above. The walk-in lever 27 is provided with an arm 29 which extends through the slit 25 of the base plate 22 and the movable rail 4 to the outside of the movable rail 4. A cable 30 that is linked to the front and rear inclination of the seat back (not shown) is connected to the tip of the arm 29. The tip of the arm 29 is pulled backward by the cable 30 when the seat pack is moved forward. Further, on the inside of the walk-in lever 27, that is, on the opposite side of the arm 29 with the rivet 28 therebetween, a pressing piece 31 is formed to rise upward from the upper surface of the base plate 22. Have been. The pressing piece 31 has a pressing portion 31a formed in a U-shaped cross section at an outer edge thereof. The width (height dimension) of the pressing portion 31 a is at least twice the diameter of the operation port 8. The pressing portion 3 1a of the pressing piece 3 1 is rotated by rotating the walk-in lever 27 around the axis of the rivet 28 so that the pressing portion 3 1a abuts on the crank portion 17 of the operation port 8 to cause the crank portion 17 to move. It can be moved to the movable rail 4 side. Further, the walk-in lever 27 has a cam hole behind the rivet 28.

32 are formed. The cam hole 32 extends in an arc around the axis of the rivet 28, and has a narrow portion 32a slightly larger than the outer diameter of a cam pin 35 described later, and is movable more than the narrow portion 32a. A wide portion 32b having a width wider than that of the narrow portion 32a. The narrow portion 3 2 a of the cam hole 32 extends in a direction intersecting with the long hole 26 of the base plate 22 when the walk-in lever 27 is mounted on the upper surface of the base plate 22. .

A memory lever 34 is rotatably mounted on the lower surface of the base plate 22 around the axis of the rivet 33 by a rivet 33 inserted into the shaft hole 24 from below. You. The memory lever 34 is provided with a cam pin 35 standing through the elongated hole 26 of the base plate 22 and located in the cam hole 32 of the walk-in lever 27. Further, a distal end portion 36 extending downward is bent at an outer end portion of the memory lever 34. A locking piece 37 extending upward is also bent at the inner end of the memory lever 34. A spring 38 is provided between the locking piece 37 and the inner end of the pressing piece 31 of the walk-in lever 27 to urge each other in a direction to attract each other. A memory latch 20 extending vertically from the operation port 8 is attached to a portion of the operation rod 8 behind the crank portion 17 so as to be rotatable around the axis of the operation rod 8. The lower portion of the memory latch 20 below the operation rod 8 is bent rearward in a crank shape, and has a horizontal portion 39 a extending substantially parallel to the operation port 8 and a horizontal portion 39. a extending downward from the rear end of the memory latch 20 and having a lower end 39 located rearward (left side in FIG. 3) of a portion above the operation port 8 of the memory latch 20. The operating rod 8 between the memory latch 20 and the bracket 6 is provided with a spring 40 for urging the memory latch 20 in a direction in which a lower end 39 of the memory latch 20 moves to the fixed rail 3 side. ing. At the upper end of the memory latch 20, a memory rod 21 extending forward and in parallel with and near the crank portion 17 is fixed. The front end of the memory rod 21 is attached to the upper end of a link 41 rotatably attached to a portion of the operation rod 8 forward of the crank 17. That is, the memory rod 21 has a shape straddling the crank portion 17 of the operation rod 8 together with the memory latch 20 and the link 41. The pressing piece 3 1 of the walk-in lever 27 that comes into contact with the crank part 17 also comes into contact with the memory rod 21 at the same time, and moves the crank part 17 and the memory rod 21 together to the movable rail 4 side. be able to.

On the lower surface of the fixed rail 3, a memory block 19 suspended from the fixed rail 3 so as to be slidable back and forth is provided. From the support arm 19 a of the memory block 19, a square bar-shaped memory bar 42 extends forward. The memory par 4 2 moves forward along the fixed rail 3 with the memory block 19 as part of the memory block 19 It can be moved later. The memory bar 42 is arranged at a position where it can interfere with the tip 36 of the memory lever 34.

Further, the memory block 19 is provided with a hook portion 43 protruding inward from the inner side surface of the memory block 19 and capable of engaging with the lower end portion 39 of the memory latch 20. As shown in FIG. 4, a concave groove 45 is formed at the tip end of the hook portion 43 so that the lower end portion 39 of the memory latch 20 rotates around the axis of the operating rod 8 and engages therewith. Behind the concave groove 45, a stopper 46 is formed so as to protrude. In front of the concave groove 45, the distance from the inner side surface of the memory block 19 toward the rear in order to guide the lower end 39 of the memory latch 20 moved from the front into the concave groove 45. The hypotenuse 47 where the number increases is formed. The hook portion 43 is urged in a projecting direction by a spring 44 (see FIG. 12) provided in the memory block 19.

Next, the operation of this embodiment will be described.

[Normal use state]

In a normal seat use state where the seat back is not moved forward, the front and rear positions of the seat are fixed because the slide latch 10 is engaged with the lock hole 11 of the fixed rail 3 by the biasing force of the spring 12. Therefore, the occupant can obtain a stable sitting state. In this normal use condition, to change the front / rear position of the seat, hold the operation handle 9 of the operation rod 7 on the inner side slide rail 1 by hand and rotate it in the direction away from the slide rail 1. The slide latch 10 welded to 7 comes off from the opening 11. The rotation of the operation rod 7 on the inner side is also transmitted to the operation rod 8 on the outer side via the transmission wire 15, and the slide latch 10 on the outer side is also disengaged from the lock hole 11 (FIG. 13). See). At this time, the movable rail 4 can freely slide back and forth, and the seat can be moved to a desired position. When the operator releases the operating handle 9 of the operating rod 7 at the desired position, both slide latches 10 are re-locked to the lock holes 11 by the biasing force of the springs 12, and the front and rear positions of the seat are fixed. Is done. Since the memory latch 20 is independent of the slide latch 10 even while the movable rail 4 moves back and forth in this way, the lower end 39 of the memory latch 20 is connected to the spring 40. The state of engagement with the hook portion 43 of the memory block 19 is maintained by the urging force. Therefore, the memory block 19 moves back and forth together with the movable rail 4, and the relative positional relationship between the memory block 19 and the movable rail 4 does not change. Also, in the interlock mechanism 18, as shown in FIG. 7, the pressing piece 31 of the walk-in lever 27 is pressed by the memory rod 21 of the memory latch 20 receiving the urging force of the spring 40. Further, since the pulling force from the cable 30 does not act on the arm 29 of the walk-in lever 27, the walk-in lever 27 does not rotate. Since the memory lever 34 is connected to the walk-in lever 27 and the spring 38 at the locking piece 37, a rotational force around the axis of the rivet 33 acts counterclockwise in FIG. However, the cam pin 35 is restrained by the elongated hole 26 of the base plate 22 extending in the direction intersecting with each other and the narrow portion 3 2a of the cam hole 32 of the walk-in lever 27. Since the cam hole 32 is fixed to the end of the narrow portion 32a, the memory lever 34 does not rotate. The memory lever 34 is inclined with respect to the fixed rail 3, and the distal end 36 is retracted to a position where it does not interfere with the memory bar 42 of the memory block 19. In this state, the interlock mechanism 18 is “interlock off”, and the interlock mechanism 18 is not functioning.

[Walk-in operation state]

Next, to make it easier for the occupants to get on and off the riyashito, the seat back of the front seat was moved forward, and as shown in Fig. 8, the arm 29 of the walk-in lever 27 was pulled backward by the cable 3.0. As a result, the walk-in lever 27 rotates, and the pressing piece 31 moves to the movable rail 4 side. With this pressing piece 31, both the crank 17 of the operation port 8 and the memory latch 20 [memory rod 21] are pushed and moved toward the movable rail 4 (FIG. 1). 4). Then, the operation rod 8 rotates in a direction to disengage the slide latch 10 from the lock hole 11 (the operation port 7 of the slide rail 1 on the inner side also rotates by the transmission wire 16), and the memory latch Since 20 also rotates in the direction in which the lower end 39 is disengaged from the hook 43 of the memory block 19, the movable rail 4 can move forward, and the memory block 19 is left at that position.

In addition, when the cam pin 35 of the memory lever 34 is positioned within the wide portion 32b of the cam hole 32 by the rotation of the walk-in lever 27, the constraint of the cam pin 35 is released. The memory repeller 34 is rotated by the biasing force of the spring 38, and the cam pin 35 moves to the rear end in the elongated hole 26 of the base plate 22 (FIG. 8). At this time, the distal end 36 of the memory lever 34 is arranged at a position where it can interfere with the front end of the memory bar 42.

Since the slide latch 10 and the memory latch 20 are disengaged and the seat is moved forward with the seat back tilted forward, it is easy for the occupant to get on and off the liar seat. In particular, in this embodiment, some measures are taken to secure a large forward movement stroke of the movable rail 4. One of them is that a memory bar 42 extends forward from a memory block 19. By extending the memory bar 42 forward and setting the point of interference with the tip 36 of the memory and lever 34 forward, the position of the main body of the memory block 19 can be set rearward. A large forward stroke of the movable rail 4 with respect to the fixed rail 3 can be ensured.

The second point is that the memory latch 20 is attached to the operation rod 8 behind the crank portion 17. In this way, by setting the position of the memory latch 20 to the rear, the position of the memory block 19 engaged with the memory latch 20 can also be set to the rear, and accordingly, the forward movement stroke of the movable rail 4 with respect to the fixed rail 3 Can be secured greatly.

The third point is that the portion of the memory latch 20 set rearward as described above, which is lower than the operation rod 8, is bent further rearward. Therefore, more memory blocks The position of the work 19 can be set to the rear, and the forward movement stroke of the movable rail 4 can be further secured.

In this way, after the movable rail 4 is largely slid forward, the seat pack is raised to return the seat to the original position. Then, the tension of the cable 30 is reduced, and the walk-in lever 27 starts rotating clockwise in FIG. 9 by the force of the spring 38. However, when the walk-in lever 27 has rotated a predetermined angle, the cam pin 35 of the memory lever 34 receives the force of the spring 38 as shown in FIG. Since the engaging portion 32 engages with the step portion 32c between the wide portion 32b and the narrow portion 32a, the walk-in lever 27 cannot return to the original rotation position. Then, the crank part 17 and the memory rod 21 are pushed by the pressing piece 31 of the power quiver lever 27, and the state of moving to the movable rail 4 side is maintained. This is "interlock on". This interlock-on state also acts on the inner side slide rail 1 via the transmission wire 16, and the slide latch 10 of the inner side slide rail 1 is also held in a state separated from the lock hole 11. You.

In other words, in the lock-in state, the movable rail 4 can move rearward as it is even if the seat back is caused. In this interlock-on state, the front end of the memory block 42 of the memory block 19 where the distal end 36 of the memory lever 34 is left just before the start of the forward movement during the backward movement of the movable rail 4 The interference causes the memory lever 34 to rotate (see FIG. 10), and is released when the cam pin 35 and the step portion 32 c of the cam hole 32 are disengaged.

When the interlock-on state is released, the walk-in lever 27 is rotated to the original position by the spring 38, and the pressing piece 31 moves in the direction away from the movable rail 4. As a result, the inward movement of the crank portion 17 and the memory rod 21 (in a direction away from the movable rail 4) is allowed, and the slide latch 10 is re-locked to the lock hole 11. The position where the slide latch 10 relocks in the lock hole 11 is The left side of the memory block 1 9 is defined by the front end position of the memory pad 4 2 just before moving the seat forward, so the seat must always return to the position just before moving forward for the print-in. Can be. Also, the lower end 39 of the memory latch 20 is again engaged with the hook 43 of the memory block 19, and the memory block 19 is again connected to the movable rail 4. Therefore, the occupant does not need to adjust the front / back position of the seat again after the seat is re-locked as before, and the operability of the seat improves.

Further, in the hook portion 43, an oblique side 47 for guiding the lower end 39 of the memory latch 20 to the engagement position is formed at the front side of the concave groove 45 with which the lower end 39 of the memory latch 20 is engaged. A hook 46 is formed on the rear side to prevent the lower end 39 of the memory latch 20 from moving backward, so that the hook 43 can engage with the lower end 39 of the memory latch 20 moving backward. become. That is, the memory levers 34 and the memory bars 42 interfere with each other, the interlock state is eliminated, and when the slide latch 10 is re-locked, the locking claws of the slide latch 10 are moved through the lock holes 11. Since the memory latch 20 is at the shifted position, the engagement operation of the memory latch 20 with the hook portion 43 starts earlier than the engagement of the slide latch 10 with the lock hole 11, and the memory latch 20. The lower end 39 of the hook may come into contact with the hypotenuse 47 of the hook part 43, but even in such a case, the lower end 39 slides backward on the hypotenuse 47, and the memory As the latch 20 slightly rotates around the operation rod 8, the spring 44 shrinks and the hook portion 43 sinks into the memory block 19, so that the lower end portion 39 is guided by the concave groove 45. The hooks 43 are securely engaged. Also, if the rotation of the memory latch 20 around the operation rod 8 is not sufficiently performed, the contact position when the lower end portion 39 contacts the hook portion 43 is smaller than the depth of the concave groove 45. Even if it is shallow, since the stopper 46 always prevents the lower end 39 from moving backward at the position of the groove 45, even in such a state, the lower end 39 is securely inserted into the groove 45. Engages.

As described above, in the present embodiment, the movable rail 4 on which the seat is fixed is attached to the fixed rail 3 fixed to the floor so as to be slidable back and forth, and the movable rail 4 is fixed along the longitudinal direction of the fixed rail 3. A plurality of lock holes 11 to support the operation rod 8 rotatable around the axis on the movable rail 4 and engage the operation hole 8 with the lock hole 11 Attach a slide latch 10 to lock the movable rail 4 at an arbitrary front and rear position, provide an interlock mechanism 18 on the movable rail 4, and press a pressing piece formed on the walk-in lever 27 of the interlock mechanism 18. 31.When the seat back is moved forward, the crank part 17 formed on the operating rod 8 is pushed to rotate the operating rod 8 in the unlocking direction, and the interlock mechanism 18 locks the slide latch 10. The interlock is turned on with the release state maintained, enabling the movable rail 4 to move forward. After the movable rail 4 moves forward, the seat back is raised and moved backwards. The memory levers 3 and 4 interfere with the memory block 19 attached to the fixed rail 8, and the interlock mechanism 18 turns off the interlock that releases the lock release state of the slide latch 10, and the slide latch 10 A movable seat 4 is engaged with a lock hole 11 and a movable rail 4 is re-locked at a position defined in a memory block 19. The upper and lower portions of the memory latch 20 are rotatably mounted and the lower end 39 of the memory latch 20 is provided with a biasing means 40 for rotating the lower end 39 toward the rail 4 side. A memory rod 21 pressed by the pressing piece 3 1 of the walk-in lever 27 along with the section 17 is provided, and the memory block 19 attached to the fixed rail 3 is slidable back and forth. When the interlock mechanism 18 interlocks with the relock 19, the lower end 39 of the memory latch 20 is engaged with the lower end 39 of the memory latch 20 in a state in which the front and rear relative immovability is impossible, and the lower end 39 of the memory latch 20 is disengaged from the fixed rail 3. A hook portion 43 is provided which can be disengaged by rotating in the direction away from the hook.

According to this configuration, the lower end 39 of the memory latch 20 is engaged with the hook 43 of the memory block 19 when the seat is slid forward and backward in a normal use state in which the seat back is not moved forward. Therefore, the memory block 19 moves back and forth together with the movable rail 4. And for the walk-in operation, the seat back is in front When it is folded down, both the crank part 17 of the operation rod 8 and the memory rod 21 provided on the upper end of the memory latch 20 are pressed by the pressing piece 31 of the walk-in lever 27 of the interlock mechanism 18. Are pushed together, the slide latch 10 is detached from the lock hole 11, the lower end 39 of the memory latch 20 is detached from the lock portion 43, and the seat can be moved forward. At this time, the memory block 19 is left at the position immediately before the forward movement. Next, after moving the seat forward, raise the seat back and move the seat backward to return the seat to its original position.In the middle of the backward movement, the tip 36 of the memory lever 34 moves forward. The slide latch 10 re-locks to the lock hole 11 due to the interference with the memory block 19 left behind at the previous position, and the lower end 39 of the memory latch 20 also engages with the hook portion 4 3 of the memory block 19. Again, and return to the original state. As described above, since the seat can be returned to the position immediately before the forward movement, the occupant does not need to adjust the front and rear position of the seat again after re-locking the seat, and the operability of the seat is improved.

Further, in the present embodiment, the memory block 19 has a memory bar 42 extending forward, and the front end of the memory bar 42 interferes with the tip 36 of the memory lever 34. Since the memory bar 4 2 is extended forward and the point of interference with the tip of the memory lever 3 4 is set closer to the front, the position of the memory block 19 can be set to the rear by that much, and it can move with respect to the fixed rail 4 A large forward movement stroke of the rail 4 can be secured.

Further, in the present embodiment, the memory latch 20 is attached to the operation port 8 behind the crank portion 17 to form the memory port 21 from the upper end of the memory latch 20 toward the front. At the same time, the front end of the memory rod 21 is supported by a link 41 attached to an operation rod 8 forward of the crank portion 17.

In addition, the lower part of the memory latch 20 is bent rearward from the middle part in the vertical direction. With this configuration, the position of the memory block 19 is set to the rear, so that the forward movement stroke of the movable rail 4 with respect to the fixed rail 3 can be further secured. Further, in the present embodiment, the hook portion 43 provided in the memory block 19 has a structure in which the lower end 39 of the memory latch 20 in the inner lock-off state can be engaged while moving backward. Therefore, when the slide latch 10 is re-locked, the engagement operation of the memory latch 20 with the hook portion 4 3 is performed by the memory lever 3 due to the pitch between the lock holes 11 with which the slide latch 10 is engaged. Even if the memory latch 20 moves backward and comes into contact with the hook portion 43 from the side while the memory latch 20 moves backward, the timing of the memory latch 20 The lower end 39 and the hook portion 43 can be reliably engaged.

In the above embodiment, an example is shown in which the interlock mechanism 1.8 is provided on the slide rail 2 on the outer side, but it is also possible to provide the interlock mechanism 1.8 on the slide rail 1 on the inner side. Since both the operation lever 9 and the interlock mechanism 18 are arranged on the slide rail 1 on the inner side, the cable 3 that is pulled backward when the operation lever 9 for manual operation or the seat back is moved forward. When 0 is operated, the slide rail 2 on the auter side can be operated by the transmission wire 15. Therefore, the transmission wire 16 becomes unnecessary. Further, between the movable rail 4 and the fixed rail 3, a helper spring for automatically moving the movable rail 4 backward after moving forward may be provided. Then, just by causing the seat pack after moving forward, the seat self-propelled backward, and in the middle, the slide latch 10 and the memory latch 20 were set at the position specified at the front end of the memory bar 42. Re-locking further improves seat operability. Industrial potential

As described above, according to the present invention, since the seat can be returned to the position immediately before the forward movement, the occupant does not need to adjust the front / rear position of the seat again after re-locking the seat. Operability is improved. This improves livability and getting on and off.

Claims

The scope of the claims

1. A movable rail on which the seat is fixed is attached to the fixed rail fixed to the floor so that it can slide freely back and forth, and a plurality of lock holes are formed along the length of the fixed rail. A slide latch that supports the operation rod that is rotatable around the center and that engages with the lock hole to lock the movable rail at an arbitrary front-rear position is attached to the operation port.

An interlock mechanism is provided on the movable rail, and a pressing piece formed on the walk-in lever of the ink-and-shoot mechanism pushes a crank portion formed on the operation rod when the sheet pack is tilted forward, thereby moving the operation rod. While rotating in the unlocking direction, the interlock mechanism turns on the interlock with the unlocked state of the slide latch, enabling the movable rail to move forward,

In the middle of moving the movable rail forward and then moving the movable rail backward, the memory lever of the interlock mechanism interferes with the memory block attached to the fixed rail, and the interlock mechanism holds the slide latch unlocked and held. The walk-in device for an automobile seat, in which the slide latch is engaged with the lock hole and the movable rail is re-locked at the position specified in the memory block,

A biasing means for rotatably attaching the upper and lower portions of the memory latch to the operation rod and rotating the lower end of the memory latch toward the fixed rail is provided on the operation rod. Provide a memory rod that is pressed by the pressing piece of the in-lever,

The memory block attached to the fixed rail can be freely moved back and forth, and when the interlock of the interlock mechanism is off, the memory block is engaged with the lower end of the memory latch in a state in which the memory latch cannot be moved back and forth, and the lower end of the memory latch is moved. Move away from fixed rail Of a vehicle seat provided with a hook that can be disengaged by rotating

2. A walk-in device for a vehicle seat according to claim 1, wherein

A walk-in device in which a memory block has a memory bar extending forward, and a front end of the memory bar interferes with a tip of a memory lever.

3. The vehicle seat walk-in device according to claim 1,

The memory latch is attached to the operation port on the rear side of the crank portion to form a memory rod from the upper end of the memory latch toward the front, and the front end of the memory rod is attached to the operation rod forward of the crank portion. Walk-in supported by the link

4. A walk-in device for an automobile seat according to claim 1,

Walk-in device with the lower part of the memory latch bent rearward from the upper and lower middle part

5. A vehicle seat walk-in device according to claim 1,

The hook portion provided in the memory block is a walk-in device in which the lower end of the memory latch in the interlock-off state can be engaged while moving backward.