JPH05238294A - Seat equipped with walk-in mechanism - Google Patents

Abstract

PURPOSE:To execute the operation of a walk-in mechanism by an operating switch from a driver's seat and secure the sure tilt of a seat back, as for a seat equipped with the walk-in mechanism which facilitates the getting-on/off operation by turning down the seat back on getting-on/off to a rear seat in a two-door vehicle and forwardly shifting a seat cushion. CONSTITUTION:An automatic operating device 30 is installed on the conventional seat equipped with a walk-in mechanism, and is started by an operating switch 31 installed at a driver's seat, and the lock for the walk-in mechanism is released to tilt a seat back 16. A means for the continuation of the lock release for the walk-in mechanism for a prescribed time is installed on the automatic operating device 30, and the lock release state is continued for a certain time, and the seat back 16 is surely tilted by the above-de-scribed continuation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat with a walk-in mechanism, and more particularly to a seat for a vehicle with a walk-in mechanism mainly used for a two-door type vehicle.

[0002]

2. Description of the Related Art Mainly in a two-door type vehicle front seat, a seat cushion is moved forward in response to a forward leaning of the seat back to facilitate passengers getting in and out of the rear seat, and then the seat back is used. A seat with a walk-in mechanism is used which is used as a normal seat by standing up and returning and returning the seat cushion to the rear.

Conventionally, in this type of walk-in mechanism, a spring device for tilting the seat back and moving the seat cushion forward, a force for the spring device at the rearward returning position of the seat back and the rearward returning position of the seat cushion. It had a lock plate and a lock arm for accumulating and holding the seat back at the rearward returning position against the force, and a seat slide lock mechanism for holding the seat cushion at the rearward returning position.

Therefore, in order to tilt the seat back and move the seat cushion forward, the open lever for releasing the engagement with the lock plate is manually operated. The open lever, that is, the manual operation lever. The lock plate and the lock arm are disengaged by, and the seat back tilts forward due to the force of the spring device.The seat slide lock mechanism of the seat cushion is released according to the tilt of the seat back. It moves forward due to the force of the device.

Further, the upright return of the seat back and the backward return of the seat cushion are performed by pulling back the seat back and the seat cushion against the force of the spring device by a manual operation, and the seat back and the seat cushion are returned to predetermined positions. When returned, the lock arm engages with the lock plate, and the seat slide lock mechanism operates to fix the seat back and the seat cushion.

[0006]

However, in the conventional seat with the walk-in mechanism, the manual operation lever of the walk-in mechanism, particularly in the passenger side seat, is generally provided on the door side of the vehicle and in an inconspicuous position. However, there are times when it is not possible to operate smoothly, but there are times when the driver has to operate, and in that case, he / she must lean out and operate. There was a big problem in operability.
Further, it is necessary to move against the force of the spring device during the returning operation of the seat back and the seat cushion, which requires a large force, and there is a problem in operability similar to that in operating the walk-in mechanism.

Therefore, there is an automatic operation device that automatically moves the manual operation lever by a single operation switch provided in the driver's seat to operate the walk-in mechanism, and automatically restores the seat cushion and the seat back by electric power. Wanted

An object of the present invention is to solve the problems in the conventional seat with a walk-in mechanism, and to operate the walk-in mechanism, that is, tilt the seat back and slide the seat cushion forward. (EN) It is possible to provide a seat with a walk-in mechanism which can be operated from a seat by an operation switch, and in which a seat back can be surely tilted by an operation switch installed near a driver.

[0009]

A seat with a walk-in mechanism according to the present invention locks a seat cushion at a predetermined position with respect to an upper rail and a seat back at a predetermined position with respect to a seat cushion, and uses a manual operating lever. In addition to the walk-in mechanism in which the seat cushion is tilted when the seat back is unlocked and the seat cushion is unlocked and the seat cushion is slid, the seat back lock is unlocked by electric force. And an operation switch for activating the automatic operation device installed in the vicinity of the driver, wherein the automatic operation device has means for keeping the unlocking of the walk-in mechanism for a predetermined time. Characterize.

[0010]

According to the seat with walk-in mechanism of the present invention,
When the driver presses the operation switch provided in the driver's seat, the automatic operation device operates to unlock the seat back. At this time, the lock release maintaining means incorporated in the automatic operation device operates to maintain the lock release state of the seat back for a predetermined time. Therefore, the seat back is surely tilted regardless of the state of the seat back, and the passage for getting on and off is secured.

[0011]

EXAMPLES The walk-in mechanism seat of the present invention will be described in more detail with reference to the examples shown in the drawings. Figure 1
Shown is a seat 10 with a walk-in mechanism according to an embodiment of the present invention. This walk-in mechanism seat 1
A seat cushion 13 is fixed to an upper rail 12 that is paired with a lower rail 11 fixed to the floor of the vehicle body and is slidably fitted in the lower rail 11 in the longitudinal direction. A seat back 16 which is attached via a plate 14 to the seat cushion 13 and can be tilted back and forth around a support shaft 15 at the center of the mounting portion of the plate 14 to the seat cushion 13.

Seat 1 with walk-in mechanism of this embodiment
As shown in FIG. 1, 0 includes a conventional walk-in mechanism that tilts the seat back 16 and slides the seat cushion 13 forward by manual operation (manual operation), and the walk-in mechanism is on the side of the seat cushion 13. A lock plate 17 fixed to a seat back rotating support shaft 15 and a manual operation lever, that is, an open lever 18 rotatably attached to the support shaft 15 are provided.

The tooth portion 17a of the lock plate 17 is meshed with the tooth portion 19a of an inverted L-shaped lock arm 19 pivotally attached to the seat cushion 13 or a mounting plate fixed to the seat cushion 13. Further, the manual operation lever 18 has a grip portion 18a at the front end and a pedal portion 18b at the rear end, and a pin 18c formed inside the lever portion from the pivotally attached portion to the support shaft 15 to the grip portion 18a has a lock arm 1.
It is fitted in a slot 19b which is a cam groove formed in the frame 9.

A spiral spring 20 is arranged outside the plate 14 attached to the seat back 16 so as to be centered on the support shaft 15, and one end located inside thereof is connected to the support shaft 15 and is located outside. The other end located is the plate 14
This spiral spring 20 is locked to the protrusion 14a formed on the
Due to this, an acting force for tilting the seat back 16 is always applied. The rotation (tilting) movement of the seat back 16 by the spiral spring 20 is normally prevented by the lock arm 19 meshing with the lock plate 17.

Further, a spring (not shown) is attached between the rear end of the upper rail 12 and the lower rail 11 located in front of the upper rail 12, whereby an acting force for sliding the upper rail 12 or the entire seat forward. Is always given. A seat slide lock device (not shown) attached to the lower rail 11 against such an action force engages the claw between the lower rail 11 and the upper rail 12 to prevent the upper rail 12 from sliding. In this seat slide lock device, the claw fitting between the lower rail 11 and the upper rail 12 is released at the same time when the seat back 16 is tilted.

In a seat provided with such a walk-in mechanism, when the occupant gets in and out of the rear seat, the occupant in the front seat is gripped by the grip portion 18a of the manual operation lever 18.
Or pulling up by hand, or an occupant in the rear seat steps on the pedal portion 18b of the manual operation lever 18 to rotate the manual operation lever 18. The rotation of the manual operation lever 18 causes the pin 18c to move in the slot 19a of the lock arm 19 and rotate the lock arm 19 in the direction of separating from the lock plate 17.

As a result, the tooth portion 1 of the lock plate 17 is
As a result of the engagement between 7a and the tooth portion 19a of the lock arm 19 being released, the seat back 16 is tilted forward by the action force of the spiral spring 20 and at the same time the claw fitting of the seat slide lock device is released by means not shown. The seat cushion 13 slides forward by the force of the spring to secure a passage (space) for getting on and off the rear seat. After that, when the seat cushion 13 and the seat back 16 are returned to their original positions, the occupant pushes them back by the force of the hand against the acting force of the spring and the spiral spring 20, respectively.

Therefore, in addition to the conventional walk-in mechanism, the seat 10 with the walk-in mechanism of the present embodiment automatically operates the walk-in mechanism and the seat cushion 13 and the seat back 16 thereafter. It also includes an automatic operating device 30 for automatically performing the return of the. The automatic operation device 30 in the seat 10 with the walk-in mechanism of this embodiment includes, for example, a switch 31 mounted on the driver's seat, a controller or control device 32 electrically connected to the switch 31, and the controller 3.
And an actuator 33 actuated by the seat cushion 13
Is supported by the plate 21 between the upper rails 12 and the lower part of the. As shown in FIG. 2, the actuator 33 includes a single electric motor 34, a worm 35 provided on the output shaft of the electric motor 34, and a worm wheel 36 meshing with the worm 35.

The worm wheel 36 is rotatably supported by a shaft 37 extending in the vertical direction, and a tooth portion 38 is formed on the peripheral surface of the boss portion thereof, which functions as a sun gear described later. Two planet gears 39 arranged around the tooth portion 38 formed on the boss portion mesh with each other, and the planet gear 39 is attached to the end portion of an arm 40 fixed to the shaft 37 so as to be able to revolve and rotate. ing. The plate designated by the reference numeral 41 in FIG.
It is attached to the lower end portion of the pin 42 supported by 0 to stably maintain the position and reinforce and support the pin 42.

Each planetary gear 39 meshes with an internal toothed wheel 43 arranged outside its orbit. The inner toothed wheel 43 is rotatably supported on the shaft 37 via a metal sleeve 44, and a cam 45 as shown in FIG. 3 is integrally formed on the upper surface thereof. The cam 45 is provided with a large diameter portion 45a formed in the outer peripheral portion in the range of the angle θ and a drop step portion 45b that moves to the small diameter side at the end side of the large diameter portion 45a, and the start end side of the large diameter portion 45a. Is gently continuous with the small diameter side. In the vicinity of the cam 45, the cam 4
5, a lever 46 serving as a follower is pivotally attached at a proper position at a base end 46a thereof, and is installed by a spring 47 so as to be constantly in pressure contact with a cam surface 45a.
5 is formed with a protrusion 46b that contacts the cam surface 45a. The cam 45 and the lever 46 constitute one actuating lever device.

Such a worm 35, a worm wheel 36, a sun gear 38, a planetary gear 39, an arm 4
0, a planetary gear speed reducer consisting of an internal tooth wheel 43 or the like, that is, a planetary gear device 48, a cam 45, a lever 46,
The shaft 37 is housed in a housing 49 that is open at the top, and the opening is closed by a cover 50. One end of a wire 51 is connected to a tip portion 46c of a lever 46 which is rocked by a cam 45, and the wire 51 is connected to a housing 49.
It is pulled out to the outside through a hole formed in, and the other end is connected to a link portion 18d of the manual operation lever 18 via a joint 52.

The shaft 37, the lower end of which is borne by the housing 49, has the upper end thereof protruding to the outside through the cover 50, and the protruding end has a take-up groove formed around it which functions as an operating lever device. Two winding rotating bodies 53, 54 are rotatably supported on the shaft 37. A drive member 55 is arranged between the two winding rotary bodies 53 and 54, and the member 55 is fixed to the shaft 37 and rotates together with the shaft 37.

Further, a concave portion is formed on the upper surface of the upper winding rotary member 53, and a plate 56 is arranged in the concave portion. The plate 56 is attached to the shaft 37 by, for example, a spline so as to freely move in the axial direction so as to rotate integrally with the shaft 37, and is wound by a spring 57 arranged on the upper part thereof and a nut 58 for pressing the spring 57. The take-up rotor 53 is pressed against the take-up rotating body 53, and the pressing force becomes the contact force of the take-up rotating body 53 with respect to the drive member 55.

The drive member 55, the plate 56, the spring 57, the nut 58 and the like constitute a so-called torque limiter which does not allow the drive member 55 to transmit a torque of a predetermined value or more to the winding rotary member 53. Such a torque limiter is also provided on the lower surface side of the other winding rotary body 54. By the way, the protrusion 54 is provided on the outer peripheral portion of the winding rotary member 54.
a is formed and abuts on a stopper pin 59 provided upright on the upper surface of the cover 50.

One of the winding rotary members 53 acts to return the seat cushion 13 to the retracted side return position. That is, as shown in FIG. 1, an angle 22 is fixed to the rear side of the lower rail 11, a holder 23 is pivotally attached to the rear side of the angle 22, and one end of the wire 60 is attached to the swinging tip end thereof. Is installed. This wire 6
0 is the winding rotary member 5 through the hole formed in the angle 22.
4 connected to the peripheral groove. The holder 23 is urged by the spring 24 so that the wire 60 is always pulled at the swinging tip portion thereof.

The other winding rotary member 54 is the seat back 1
6 acts to return 6 to the upright side return position. That is,
As shown in FIGS. 1 and 4, the wire 61a, one end of which is connected to the peripheral groove of the winding rotary member, is fixed at its other end to a fixing metal fitting 64 via a constant pulley 62 and a moving pulley 63 that change the direction. ing. The pulleys 62, 63 and the fixing metal fitting 64 are all installed on the upper surface of the cover 50.

One end of another wire 61b is connected to the shaft center of the movable pulley 63, and the wire 61b has a guide pulley 65 mounted on the upper rail 12 and the other end supports the seat back 16 through the plate 14. It is connected to the outer peripheral portion of a rotary lever body 67 that is rotatably attached to the support shaft 15 that is the center of rotation at the side portion. The rotary lever body 67 is constantly subjected to a rotational force by a spring 68 in a direction in which the wire 61b is stretched. A claw portion 67a is formed on the outer peripheral body of the rotary lever body 67, and the claw portion 67a is formed.
When the rotary lever body 67 is rotated by the pulling force of the wire 61b, a contacts the pin 69 provided on the plate 14 supporting the seat back 16.

By the way, a detection switch 70 is attached to the side of the upper rail 12 near the lower portion of the plate 14 supporting the seat back 16 so that the projection of the tip of the operating piece 70a contacts the edge of the plate 14. Has been.
On the other hand, a recess 71 is formed in the plate 14 so that when the seat back 16 is tilted, the projection of the tip of the operating piece 70a of the detection switch 70 enters and the pushing of the operating piece 70a against the contact 70b is released. Therefore, the operating piece 7 that is in contact with the edge of the plate 14 except that the seat back 16 is tilted by the operation of the walk-in mechanism.
The contact 70b is pressed by 0a to turn on the detection switch 70.

A detection switch 72 is also arranged near the lock arm 19, and a tooth portion 19a of the lock arm 19 is provided.
Engages with the tooth portion 17a of the lock plate 17 and detects when the seat back 16 is held upright. Furthermore, such a detection switch is used in the actuator 3
It is also installed near the stopper pin 59 on the upper surface of the housing cover 50 forming part 3, and this detection switch 73 detects that the protrusion 54a of the winding rotary member 54 is in contact with the stopper pin 59. To do. All of these three detection switches 70, 72, 73 are electrically connected to the controller 32 which is a controller, and the controller 32 outputs the output signals from the respective detection switches 70, 72, 73 to the seats 13, 16 and the main parts. The operation state of the mechanical section is determined.

Next, the operation of the seat 10 with the walk-in mechanism in this embodiment will be described. Note that the operation of the walk-in mechanism by the manual operation has already been described, and will be omitted.

By the way, in a normal seat use state, the rotary lever body 67 for directly applying the upright side restoring force to the seat back 16 via the pin 69 is claw portion 67a as shown in FIG. 4 by the spring force of the spring 68. Is pin 6
It is returned in the direction away from 9. At this time, as shown in FIG. 4, the take-up rotor 54 is in a position where the protrusion 54a abuts the stopper pin 59, and this state is detected by the detection switch 73. This point will be described again later.

On the other hand, with respect to the winding rotary member 53 that returns the seat cushion 13 to the retracted side return position, the wire 6 is caused by the spring force of the spring 24 applied to the holder 23.
0 is in a tensioned state. From such a state, when the driver operates the walk-in mechanism in the driver's seat, one operation switch 31 provided in the driver's seat is pressed. As a result, the electric motor 34 of the actuator 33 is operated,
Through the worm 35, the worm wheel 36, and thus the sun gear 38, is rotated in the L direction (solid arrow direction) as shown in FIG.

As a result, this rotational force is applied to this sun gear 3
8 is transmitted to the planetary gear 39 via 8 and the planetary gear 3 is decelerated.
9 revolves in the L direction (the direction of the solid line arrow) and tries to rotate the shaft 37 in this L direction via the arm 40, but the projection 54a of the winding rotary member 54 contacts the stopper pin 59 and rotates. Is blocked, the planetary gear 39 rotates (therefore, the arm 40 does not rotate and the shaft 37 does not rotate), and only the inner toothed wheel 43 rotates in the R direction (solid arrow direction). In this way, when the internal tooth wheel 43 makes one full revolution,
The protrusion 46 b of the lever 46 has a large diameter portion 45 of the cam 45.
swings about the fulcrum 46a as an axis while passing the θ angle of a,
The wire 51 connected to the tip portion 46c is pulled to rotate the manual operation lever 18.

As a result, the manual operation lever 18 is manually operated.
The lock plate 17 is unlocked and the walk-in mechanism operates in the same manner as when is operated. As a result, the seat back 16 tilts, and the pin 69 of the plate 14 moves to a position close to the claw portion 67a of the rotary lever body 67 accordingly. At the same time, seat cushion 1
3 also slides forward. At that time, the actuator 33
Moves forward with the seat cushion 13 and moves to the angle 2
2, the wire 60 is pulled to move it away from the holder 23.
Moves to a position where it abuts the angle 22 against the force of the spring 24 and absorbs the tension of the wire 60 (FIG. 4). It should be noted that, even after the walk-in mechanism is activated, the cam 4
5 rotates and stops at the drop step portion 45b in which the protrusion 46b has passed over the large diameter portion 45a and has fallen to the small diameter side.

By the way, the time required to tilt the seat back 16 varies depending on the rearward tilting state of the seat back 16, and the lever 46 is swung by the cam 45 to move the lock plate 17 via the wire 51 and the manual operation lever 18. The lock release time for disconnecting the engagement between the tooth portion 17a and the tooth portion 19a of the lock arm 19 needs to be set longer than the maximum time required to tilt the seat back 16, and the lock release time is set to the protrusion of the lever 46. It is time for the portion 46b to pass through the θ angle range of the large diameter portion 45a of the cam 45, so that the θ angle of the large diameter portion 45a of the cam 45 is set to a predetermined value in order to obtain the unlocking time.

When the seat back 16 is thus tilted and the seat cushion 13 is moved forward, the projection of the tip end of the operating piece 70a of the detection switch 70 is located in the notch or recess 71 formed at the edge of the plate 14. Contact point 70b
Release the push of. Then, the other detection switches 72,
73 also detects the state of each mechanism part. Next, the driver presses the operation switch 31 on the driver's seat again. As a result, the controller 32 causes the detection switches 70,
Current seat 1 depending on the presence or absence of signals from 72, 73
The states of Nos. 3 and 16 are discriminated, the operation of the actuator 33 is determined, and the operation is controlled.

In this case, the seat back 16 is tilted and the seat cushion 13 is moved forward so that a person can get in and out of the rear seat of the vehicle. , 16 are controlled to be performed by the actuator 33.
Therefore, in the electric motor 34, the sun gear 38 shown in FIG.
It is driven so as to rotate in the direction (the direction of the dashed arrow). The rotation of the sun gear 38 in the R direction causes the inner toothed wheel 43 and the cam 45 to generate a rotational force in the L direction (the direction of the arrow indicated by the broken line), but the cam surface 45a falls from the large diameter portion to the small diameter portion of the raised cam portion. Since the projecting portion 46b of the lever 46 is in contact with the step portion, the inner tooth wheel 43 and the cam 4 are
The rotation of 5 in the L direction is prevented.

Therefore, as the sun gear 38 rotates in the R direction, the planet gear 39 revolves and the arm 40 rotates in the R direction (the direction of the broken arrow). The rotation of the arm 40 rotates the shaft 37, which in turn rotates the drive member 55, and the winding rotors 53 and 54 pressed against this rotate in the R direction (the direction of the broken arrow in FIG. 4). , Each winding rotor 5
Wires 60 and 61a are respectively wound in 3 and 54.

As a result, with respect to one of the winding rotary bodies 54, the movable pulley 63 is moved to pull the wire 61a, the rotary lever body 67 is rotated, and the sheet is passed through the claw portion 67a, the pin 68 and the plate 14. The back 16 is rotated to the upright side. When the seat back 16 returns to a predetermined position, the tooth portion 17a of the lock plate 17 and the tooth portion 19a of the lock arm 19 are engaged with each other, the seat back 16 is fixedly held, and this state is detected by the detection switch 72.

Regarding the other winding rotary member 53,
As the wire 60 is wound, the seat cushion 13 is pulled toward the angle 22 side via the actuator 33, and the seat cushion 13 moves back and returns. When the seat cushion 13 is returned to the predetermined position, the lock device (not shown) is activated, and the seat cushion 13 is fixedly held.

After the seat cushion 13 and the seat back 16 are fixedly held, the electric motor 34 is driven so that the sun gear 38 rotates in the L direction as shown in FIG.
The rotation of the sun gear 38 in the L direction causes the inner toothed wheel 4 to rotate.
3, the arm 40 generates a rotational force in the R direction and the arm 40 generates a rotational force in the L direction. Since the torque is set so that the rotating force of the arm 40 is greater than the rotating force required to rotate the inner toothed wheel 43, the inner toothed wheel 43 does not rotate but rotates on the arm 40. Output is output.

As a result, the arm 40 rotates in the L direction,
The winding rotary bodies 53 and 54 rotate in the L direction. And
The protrusion 54 a of the winding rotary member 54 is provided with the stopper pin 59.
When it comes to the position where it comes into contact with, the detection switch 73 detects it and outputs it to the controller 32, and the controller 32 stops the electric motor 34. Therefore, the wire 61b is slackened via the movable pulley 63, whereby the rotary lever body 67 is rotated in the direction in which the wire 61b is stretched by the force of the spring 68, and the pawl portion 67a is moved away from the pin 68. 16 is ready to be tilted.

Further, the wire 60 is also loosened, whereby the holder 23 is also moved away from the angle 22 by the force of the spring 24, and the wire 60 is stretched to return to the state before the operation of the walk-in mechanism.

As described above, according to the seat 10 with the walk-in mechanism according to this embodiment, the automatic operation device for automatically operating the manual operation lever 18 and automatically returning the seat cushion 13 and the seat back 16 is provided. It can be configured by one actuator 33 including one electric motor 34, cam 45, take-up rotating bodies 53 and 54, and planetary gear device 48.

In the above embodiment, the large-diameter portion of the cam is formed within the predetermined angle range as the unlocking means of the walk-in mechanism, so that the time required for the seat back to tilt forward from the rearward tilted state. However, the electric motor is temporarily stopped by the lock release signal of the switch that detects the engagement between the lock plate of the seat back and the lock arm, the seat back is tilted, and the tilt of the switch that detects the tilt of the seat back is tilted. The electric motor is driven again by the signal, and the step back from the large diameter side to the small diameter side of the cam that can restore the seat back and seat cushion comes into contact with the protrusion of the lever to prevent the inner gear from rotating in the direction of the arrow L. You may make it wait at the position.

[0046]

As described above, according to the seat with walk-in mechanism of the present invention, in addition to the conventional method of operating the walk-in mechanism by manually operating the manual operation lever, the manual operation lever is also provided. Not only can be automatically operated by the operating switch on the driver's seat, but the walk-in mechanism can be unlocked without being affected by the forward tilting time of the seat back that differs depending on the backward tilting state of the seat back. It is possible to obtain a seat with a walk-in mechanism that is operable, small in size, lightweight, low in cost, and has good operability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a seat with a walk-in mechanism according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the inside of the actuator in the seat with walk-in mechanism of the present invention.

3 is a sectional view of the actuator taken along line III-III in FIG.

FIG. 4 is a structural explanatory view schematically showing a seat cushion and a seat back return drive unit in the seat with walk-in mechanism of the present invention.

5 is a configuration explanatory view for explaining the movement of the planetary gear device and the cam of the actuator shown in FIG.

[Explanation of symbols]

 10 Seat with Walk-in Mechanism 11 Lower Rail 12 Upper Rail 13 Seat Cushion 15 Spindle 16 Seat Back 17 Lock Plate 18 Manual Operation Lever 19 Lock Arm 30 Automatic Operation Device 31 Operation Switch 32 Controller 33 Actuator 34 Electric Motor 45 Cam 45a Large Diameter Part 45b Drop Stepped portion 53 Winding rotary member 54 Winding rotary member 70 Detection switch 72 Detection switch 73 Detection switch

Claims (1)

[Claims] 1. A seat cushion assembled to an upper rail that is slidably fitted in a longitudinal direction with respect to a lower rail that is assembled to a floor of a vehicle body, and a seat back tiltably provided to the seat cushion. When the seat cushion is locked at a predetermined position with respect to the upper rail, the seat back is locked at a predetermined position with respect to the seat cushion, and the seat back is unlocked by a manual operation lever. At the same time as tilting, the seat cushion is unlocked and the seat cushion is slid, a walk-in mechanism, an automatic operation device that unlocks the seat back with an electric force to operate the walk-in mechanism, and a driver's vicinity And the operation switch for starting the automatic operation device installed in A seat with a walk-in mechanism, characterized in that the automatic operation device has means for keeping the lock-in of the walk-in mechanism for a predetermined time.