JP2003291695A - Seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat enabling folding of a seat back as well as walk-in by a series of operations. <P>SOLUTION: This seat is provided with an intermediate lock mechanism 500 in which locking of a reclining mechanism 300 is released and which inhibits tilting of the seat back 401 after the seat back 401 passes a condition in which it can be seated until it is abutted on a seat cushion 201 and inhibits tilting of the seat back 401 while the seat back 401 is abutted on the seat cushion 201 and a slide lock control mechanism 600 in which locking of a seat slide mechanism 100 is released after the seat back 401 passes a condition in which it can be seated until tilting is inhibited by the intermediate lock mechanism 500 when the seat back 401 tilts forward and which locks the seat slide mechanism 100 until locking of the intermediate lock mechanism 500 is released and the intermediate lock mechanism 500 is abutted on the seat cushion 201. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat main body including a seat cushion for supporting the occupant's hips, a seat back for supporting the occupant's back, and a seat for adjusting the longitudinal position of the seat main body. The present invention relates to a seat having a slide mechanism and a reclining mechanism that adjusts a tilt angle of the seat back.

[0002]

2. Description of the Related Art As shown in FIG.
In a three-row vehicle 7 including the second seat 3 and the third seat 5, getting on and off of the second seat 3 and the third seat 5 is performed via a slide door 9 provided on the side of the second seat 3.

In particular, since the second seat 3 interferes with getting on and off the third seat 5, as shown in FIG. 8, the seat back 3a of the second seat 3 is tilted forward to move the second seat 3 to the front seat 1 side. By moving forward, the gap between the second seat 3 and the third seat 5 is widened to facilitate the getting on and off of the sliding door 9.

Such an operation is generally realized by a mechanism called a walk-in mechanism. When the reclining mechanism of the second seat 3 is unlocked without a seated person, the seat back 3a tilts forward to a predetermined angle and In conjunction with the unlocking of the reclining mechanism, the seat slide mechanism of the second seat 3 is unlocked, and the second seat 3 is pushed by the urging force of the spring or human power.
To move forward. Further, in this walk-in mechanism, when the seat back tilted forward is returned to the seatable state, the lock of the seat slide mechanism is activated.

On the other hand, as shown in FIG. 9, the vehicle 7 having three rows of seats has a reclining mechanism which can lean forward until the seat back 3a of the second seat 3 comes into contact with the seat cushion 3b and is folded. The back of the seat back 3a may serve as a table for the seated person of the third seat 5 or may serve as a luggage compartment.

In the present specification, the forward leaning of the seat back until it comes into contact with the seat cushion is hereinafter referred to as folding of the seat back.

[0007]

However, in the second seat 3 of three rows of seats, the seat slide slide mechanism,
Some have a reclining mechanism that tilts the seat back 3a forward to the folded state, but none have a walk-in mechanism.

This is possible with the conventional walk-in mechanism until the seat back 3a is tilted forward, considering that the walk-in mechanism is attached with a second seat having a reclining mechanism for tilting the seat back 3a forward to the folded state. However, at that time, the lock mechanism of the seat slide mechanism is also unlocked in conjunction with this. Since the back surface of the seat back 3a of the second seat 3 cannot be used as a table or a luggage compartment while the seat slide mechanism is unlocked, it is necessary to lock the seat slide mechanism, but in order to lock the seat slide, This is because the seat back 3a needs to be returned to a seatable state and cannot be used as a table or a luggage compartment.

The present invention has been made in view of the above problems, and a first object thereof is to provide a seat capable of walk-in and folding of a seat back by a series of operations.

A second object of the present invention is to provide a seat with good operability.

[0011]

According to a first aspect of the invention for solving the above-mentioned problems, a seat main body comprising a seat cushion for supporting the occupant's hips and a seat back for supporting the occupant's back, and In a seat having a seat slide mechanism that adjusts the position of the seat body in the front-rear direction and a reclining mechanism that adjusts the tilt angle of the seat back, the reclining mechanism is unlocked,
When the seat back leans forward, the forward lean of the seat back is prohibited until the seat back passes the seatable state and comes into contact with the seat cushion, and the seat back comes into contact with the seat cushion. The intermediate lock mechanism that prohibits the tilting of the seat back in the state, and the tilting is prohibited by the intermediate lock mechanism after the seat back passes the seatable state when the seat back tilts forward. Unlock the seat slide mechanism,
A slide lock control mechanism that locks the seat slide mechanism until the intermediate lock mechanism is unlocked and abuts on the seat cushion.

When the reclining mechanism is unlocked and the seat back is tilted forward, the intermediate lock mechanism temporarily prohibits forward leaning. The seat slide mechanism is unlocked while the seat back is in a seatable state and the forward tilt is prohibited by the intermediate lock mechanism, and the intermediate lock mechanism is unlocked until it comes into contact with the seat cushion. By providing the slide lock control mechanism for locking the seat slide mechanism between the seat slide mechanism, the lock of the seat slide mechanism is released when the forward tilt of the seat back is prohibited by the intermediate lock mechanism.

When the walk-in is performed, the seat is moved forward in the walk-in state in a state where the forward leaning of the seat back is prohibited by the intermediate lock mechanism. To return from the walk-in state to the seatable state, the seat is returned to the back and the seat back is tilted backward. The seat slide mechanism is locked again by the slide lock control mechanism while the seat back is tilted backward.

On the other hand, when folding the seat back,
Release the intermediate lock mechanism, tilt the seat back further forward, and fold the seat back. The seat slide mechanism is locked again by the slide lock control mechanism while the seat back is leaning forward. When the seat back comes into contact with the seat cushion, the intermediate lock mechanism prohibits the seat back from tilting (forward tilting or rearward tilting). In order to return the seat back from the folded state to the seatable state, the intermediate lock mechanism is released and the seat back is tilted backward.

As described above, when the reclining mechanism is unlocked and the seat back tilts forward, the seat back is in a state in which the seat back cannot be seated and is in contact with the seat cushion. And an intermediate lock mechanism for prohibiting the tilting of the seat back, and when the seat back tilts forward, the seat slide mechanism is unlocked while the seat back is in a seatable state and the tilt is prohibited by the intermediate lock mechanism. Since the intermediate lock mechanism is unlocked and the slide lock control mechanism locks the seat slide mechanism until it comes into contact with the seat cushion, the walk-in of the seat and the folding of the seat back are prevented. It becomes possible by a series of operations.

Further, the intermediate lock mechanism is unlocked to fold the seat back, and the intermediate lock mechanism is operated to return the folded seat back to the original position. That is, folding and unfolding of the seat back may be performed by operating only the intermediate lock mechanism, and the operation is consistent and the operability is good.

According to a second aspect of the present invention, the intermediate lock mechanism is provided on one of the seat back side and the seat cushion side, and on the other of the seat back side and the seat cushion side. A cam having a cam surface with which the intermediate stopper lever can abut, and a biasing means for pressing the intermediate stopper lever against the cam surface of the cam.
A step portion that prohibits sliding of the intermediate stopper lever and prohibits forward leaning of the seat back while the seat back tilts to a state where it abuts against the seat cushion after passing through a seatable state; 2. The seat according to claim 1, wherein the intermediate stopper lever is engaged with the seat back in contact with the seat cushion to form a recess for inhibiting the seat back from tilting.

When the seat back is tilted forward from the seatable state, the intermediate stopper lever comes into contact with the step portion of the cam surface of the cam, and the seat back is prevented from tilting forward. Further, when the seat back is in contact with the seat cushion, the intermediate stopper lever engages with the concave portion of the cam surface of the cam, and the tilting of the seat back is prohibited.

Further, when the seat back tilts backward from the folded state, the intermediate stopper lever slides down the step portion of the cam surface of the cam, and the seat back tilting is not prohibited.

According to a third aspect of the present invention, the slide lock control mechanism is provided rotatably on the cam drive arm that rotates with the tilt of the seat back, and can come into contact with the cam drive arm. Open lever that has a different protrusion and can contact the slide lock lever of the seat slide mechanism, and a first biasing force that biases the open lever in a direction in which the protrusion of the open lever contacts the cam drive arm. The sheet according to claim 1 or 2, comprising a means.

When the reclining mechanism is unlocked and the seat back is tilted forward, the intermediate lock mechanism temporarily prohibits forward leaning. At this time, in the slide lock control mechanism, when the seat back tilts forward, the cam drive arm and the When the open lever rotates integrally, the slide lock lever of the seat slide mechanism moves in the unlock direction to unlock the seat slide mechanism.

When the walk-in is performed, the seat is moved forward in the walk-in state in a state where the forward leaning of the seat back is prohibited by the intermediate lock mechanism. To return from the walk-in state to the seatable state, the seat is returned to the back and the seat back is tilted backward. The seat slide mechanism is locked again by the slide lock control mechanism while the seat back is tilted backward.

On the other hand, when folding the seat back,
Release the intermediate lock mechanism, tilt the seat back further forward, and fold the seat back. During the forward leaning of the seat back, the open lever separates from the slide lock lever to lock the seat slide mechanism. To return the seat back from the folded state to the seatable state, the seat back is tilted backward.

With the slide lock control mechanism itself,
Since the seat slide mechanism is unlocked, the number of parts is small and the operation is reliable. Further, since the open lever is rotated when the seat back is tilted backward in order to return the seat back from the folded state to the seatable state, the seat slide mechanism is prevented from locking → unlocking → locking. That is, the seat slide mechanism is not unlocked when the seat back is tilted.

By arbitrarily setting the shape of the cam drive arm and the shape of the open lever, the timing of locking and unlocking the seat slide mechanism can be freely changed.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. (Overall Configuration) First, the overall configuration of the seat according to the embodiment will be described with reference to FIG.

In the figure, a seat slide mechanism 100 is shown.
Includes a lower rail 110 fixed to the floor side and an upper rail 120 movably engaged with the lower rail 110.

A lower arm 200, which is a member on the side of the seat cushion 201 that supports the seat occupant's hips, is fixed to the upper rail 120, and a seat back that supports the seat occupant's back through the reclining mechanism 300. Upper arm 400 that is a member on the 401 side
Is tiltable.

In the reclining mechanism 300 of this embodiment, one of the lower arm 200 side and the upper arm 400 side has arcuate inner teeth, and the other has outer teeth capable of meshing with the inner teeth. The seat back 401 is prohibited / permitted by disengaging the inner teeth from the outer teeth of the pole. And the seat back 401
The seat back 401 can be tilted from a position where the seat can be seated to a folded state (a state in which the seat back is in contact with the seat cushion 201).

Lower arm 200 and upper arm 400
And, the reclining mechanism 300 is unlocked,
When the seat back 401 leans forward, the seat back 40
1 is in a foldable state after the seatable state (the state in which the seat back 401 contacts the seat cushion 201)
Up to the above, an intermediate lock mechanism 500 that prohibits the tilting of the seat back 401 is provided.

The lower arm 200 includes a seat back 40.
When the seat 1 is tilted forward, the seat slide mechanism 100 is unlocked while the seat back 401 has passed the seatable state and tilting is prohibited by the intermediate lock mechanism 500, and the intermediate lock mechanism 500 is unlocked and folded. A slide lock control mechanism 600 that locks the seat slide mechanism 100 until the state is set is provided. (Intermediate Lock Mechanism) The intermediate lock mechanism 500 will be described. The upper arm 400 includes a step 503 and a recess 50.
4 and a cam surface 505 provided with.

On the other hand, the lower arm 200 has a cam surface 50.
An intermediate stopper lever 501 that can abut on 5 is rotatably provided. Further, the intermediate stopper lever 501
Is biased in the direction of arrow C by a biasing means (not shown), and the intermediate stopper lever 501 is always in contact with the cam surface 505 of the upper arm 400.

Then, while the seat back 401 is tilted to the folded state after passing the seatable state, the intermediate stopper lever 501 contacts the step portion 503 of the cam surface 505 to prohibit the seat back 401 from leaning forward. Step 5
03 is set.

Further, with the seat back 401 in contact with the seat cushion 201, the intermediate stopper lever 50
The recessed portion 504 is set so that 1 is engaged and the tilting of the seat back 401 is prohibited. (Seat Slide Mechanism) The seat slide mechanism 100 is provided with a lock mechanism that prohibits the movement of the upper rail 120.

As shown in FIG. 4, which is a perspective view for explaining the lock mechanism, lock teeth 111 are formed on the lower rail 110 along the longitudinal direction. On the other hand, the cutting line C in FIG.
As shown in FIG. 3 which is a cross-sectional view taken along line C, a slide lock lever 123 using a pin 121 is provided between the upper rails 120 made of two plate materials.

As shown in FIGS. 1, 3 and 4, a bent portion 125 is provided at the rotary end of the slide lock lever 123.
And the lower rail 110 is formed on the bent portion 125.
Is formed with a lock hole 127 through which the lock tooth 111 can be engaged and disengaged. Therefore, the lock hole 127 of the slide lock lever 123 on the side of the upper rail 120 is located in the lower rail 1
10 is engaged with the lock tooth 111 of the upper rail 120, the upper rail 120 is prohibited from moving, and the lock hole 127 of the slide lock lever 123 on the upper rail 120 side is disengaged from the lock tooth 111 of the lower rail 110. The movement of 120 will be permitted.

Further, as shown in FIGS. 1 and 3, the lower arm 200 is provided above the slide lock lever 123.
A bent portion 123a is formed so as to project to the outside through the hole 200a formed in the. The slide lock lever 123 is moved to the arrow D in the figure by the spring 129, one end of which is locked to the lower arm 200 and the other end of which is locked to the bent portion 123a of the slide lock lever 123.
Is normally biased in the direction of the upper rail 12 and the lock hole 127 thereof is engaged with the lock tooth 111 of the lower rail 110.
Movement of 0 is prohibited (the seat slide mechanism is locked). (Slide Lock Control Mechanism) As shown in FIG. 1, a substantially L-shaped release lever 601 is rotatably engaged with a hinge pin 301 of a reclining mechanism 300. One of the rotating ends of the release lever 601 has a cut-and-raised portion 400 provided on the upper arm 400.
It can come into contact with a. A slot portion 301a is formed on the end surface of the hinge pin 301, the inner end portion winds around the slit portion 301a, the intermediate portion winds the hinge pin 301, and the outer end portion the cut-and-raised portion 400 of the upper arm 400.
The seat back 401 is biased in the forward tilting direction by the spiral spring 305 that is locked to a.

One end of a cable 603 is connected to the other rotating end of the release lever 601, and the other end of the cable 603 has a pin 60 attached to the lower arm 200.
5 to a cam drive arm 607 which is rotatably mounted.

The cable 603 has one end fixed to the lower arm 200 near the reclining mechanism 300 and the other end fixed to the slide lock control mechanism 60.
The outer cable 604 fixed to the lower arm 200 near 0 is inserted. The cable 603 on the cam drive arm 607 side is connected to the cam drive arm 60
7, a pulley 606 provided on the lower arm 200 near
It is connected to the cam drive arm 607 via.

The cam drive arm 607 has an intermediate portion wound around a pin 605 and one end portion of the lower arm 200.
The cam drive arm 607 is biased in the direction in which the cable 603 is stretched (the arrow E direction) by the torsion spring 609 as the second biasing means whose other end is locked to the cam drive arm 607.

As shown in FIG. 2, a pin 613 is used for the cam drive arm 607, and a seat slide mechanism 1 is provided.
Bending portion 123 of slide lock lever 123
An open lever 615 that can contact a is rotatably provided. The open lever 615 is formed with a bending protrusion 617 that can come into contact with the cam surface 608 of the cam drive arm 607. And the middle part is pin 6
13 and one end is locked by the open lever 615, and the other end is the slot 613 of the pin 613.
The torsion spring 619 serving as the first urging means locked to the a biases the open lever 615 in the direction (arrow F direction) in which the bent protrusion 617 of the open lever 615 contacts the cam surface 608 of the cam drive arm 607. ing.

Next, the operation of the above configuration will be described with reference to FIG. (I) to (II) Seatable state (neutral state) In this state, the seat slide mechanism is in a locked state.

(III) Intermediate Stopper Operation In FIG. 1, when the lever of the reclining mechanism 300 is operated while the seated person is not seated, the seat back 401 begins to lean forward due to the biasing force of the spiral spring 305.

Due to the forward tilt of the seat back 401, the cut-and-raised portion 400a of the upper arm 400 causes the release lever 6 to move.
01 is pressed, the release lever 601 is rotated, and the release lever 601 moves via the cable 603 through the cam drive arm 6 of the slide lock control mechanism 600.
07, the cam drive arm 607 rotates in the direction opposite to the arrow E direction (counterclockwise direction) against the biasing force of the torsion spring 609. Due to the rotation of the cam drive arm 607, the open lever 615 also rotates, and as shown in FIGS. 6A and 6B, the bent portion 1 of the slide lock lever 123 of the seat slide mechanism 100 is rotated.
23a is pressed to unlock the seat slide mechanism 100.

When the seat back 401 tilts forward by a predetermined angle, the step portion 503 on the upper arm 400 side of the intermediate lock mechanism 500 contacts the intermediate stopper lever 501, and further forward tilting of the seat back 401 is prohibited.

When the walk-in is performed from the state (III), the seat slide mechanism 100 is unlocked, and therefore the seat is moved forward to the walk-in state.

In order to return from the walk-in state to the seatable state, the seat is returned to the back and the seat back 4
Tilt 01 back. At this time, when the rearward tilt of the seat back 401 starts, the cam drive arm 607 and the open lever 615 also start to rotate toward the original position, and the seat slide mechanism 100 is immediately locked. Then, the cam drive arm 607 and the open lever 615 of the slide lock control mechanism 600 return to the position where they can be seated.

When the seat back is folded from the state (III), the intermediate stopper lever 501 of the intermediate lock mechanism 500 is operated to release the contact between the step portion 503 and the intermediate stopper lever 501, and the seat back 401. Further forward leaning is possible. It suffices to operate the intermediate stopper lever 501 until the step portion 503 of the upper arm 400 passes through the intermediate stopper lever 501. afterwards,
Even if the operating force of the intermediate stopper lever 501 is released, the intermediate stopper lever 501 pushes against the upper arm 400,
The forward tilt of the seat back 401 is not prohibited.

Then, the seat back 401 is further tilted forward, and the seat back 401 is folded. During the forward leaning of the seat back 401, as shown in FIG.
The open lever 615 provided on the cam drive arm 607 of the slide lock control mechanism 600 is separated from the bent portion 123a of the slide lock lever 123 of the seat slide mechanism 100, and the seat slide mechanism 10 is moved.
A lock of 0 is made.

Further, the intermediate stopper lever 501 of the intermediate lock mechanism 500 is engaged with the recess 504 of the cam surface 505,
Inclination of the seat back (forward and backward) is prohibited. Next, in order to return the seat back 401 from the folded state to the seatable state, the concave portion 504 of the cam surface 505 of the intermediate stopper lever 501 of the intermediate lock mechanism 500.
And the seat back 401 is tilted rearward.

At this time, when the rearward tilt of the seat back 401 starts, the cam drive arm 607 also starts to rotate toward the original position. Since the open lever 615 is allowed to rotate in the direction opposite to the arrow F direction (counterclockwise direction), the open lever 615 rides over the bent portion 123a of the slide lock lever 123 of the seat slide mechanism 100 in the locked state, and the slide lock control mechanism 600. The cam drive arm 607 and the open lever 615 return to the seatable state.

According to the above structure, the following effects can be obtained. (1) When the reclining mechanism 300 is unlocked and the seat back 401 leans forward, the seat back 401
The seat back 401 can be seated when the seat back 401 tilts forward and the intermediate lock mechanism 500 that prohibits the seat back 401 from tilting until the seat cushion 201 comes into contact with the seat cushion 201. The seat slide mechanism 100 is unlocked while the tilting is prohibited by the intermediate lock mechanism 500 after passing the above-mentioned state, and the intermediate lock mechanism 500 is unlocked.
Since the slide lock control mechanism 600 that locks the seat slide mechanism 100 until it comes into contact with the seat 1 is provided, the walk-in of the seat and the folding of the seat back can be performed by a series of operations.

(2) When folding the seat back from the intermediate stopper operating state, the intermediate stopper lever 501 of the intermediate lock mechanism 500 is operated to move the seat back 40.
Tilt 1 forward.

When the seat back 401 is returned from the folded state to the seatable state, the intermediate stopper lever 5 of the intermediate lock mechanism 500 can be used.
01 is operated to tilt the seat back 401 backward. That is, folding and unfolding of the seat back 401 may be performed by operating only the intermediate lock mechanism 500.
The operation is consistent and the operability is good.

In the case of a conventional seat in which the seat back can lean forward to the seat cushion, when the seat back is folded, the reclining mechanism is locked and the tilting of the seat back is prohibited. ing.

Also in this embodiment, it is possible to eliminate the concave portion 504 of the cam surface 505 of the intermediate lock mechanism 500 and use a reclining mechanism that locks the seat back in a folded state.

However, in that case, when the seat back 401 is folded, the intermediate lock mechanism is operated, and when the folded seat back 401 is returned, the reclining mechanism is operated, and the operation is inconsistent.
Operability deteriorates.

Further, the cam surface 5 of the intermediate lock mechanism 500
When the recess 504 is formed in 05 and the cost of the reclining mechanism that locks the seat back in the folded state of the seat back is compared, the internal teeth of the reclining mechanism are formed. Molds require precision and are expensive. On the other hand, the mold for forming the concave portion 504 on the cam surface 505 of the intermediate lock mechanism 500 requires less precision and is less expensive than the mold for forming the internal teeth of the reclining mechanism.

Therefore, in terms of cost, the intermediate lock mechanism 5 is also available.
It is advantageous to form the concave portion 504 on the cam surface 505 of 00. (3) With the slide lock control mechanism 600 itself,
Since the seat slide mechanism 100 is unlocked,
The number of parts is small and the operation is reliable.

(4) Since the open lever 615 rotates when the seat back 401 is tilted backward to return the seat back 401 from the folded state to the seatable state, the seat slide mechanism 100 is locked and unlocked. → It will not lock. That is, the seat slide mechanism 100 is not unlocked when the seat back 401 is tilted backward.

(5) A cable 603 for transmitting the tilting of the seat back 401 to the cam drive arm 607, and a torsion spring 60 as a biasing means for biasing the cam drive arm 607 in the direction in which the cable 603 is stretched.
9 is provided, the degree of freedom in designing the transmission means for transmitting the tilting movement of the seat back 401 to the cam drive arm 607 is increased.

(6) Since the pulley 606 for guiding the cable 603 is provided in the vicinity of the cam drive arm 607, the cable 603 and the outer cable 604 are not forcedly contacted with each other.

(7) Seat back 4 from the seatable state
When 01 is tilted forward, the intermediate stopper lever 501 comes into contact with the step portion 503 of the cam surface 505 and the forward lean of the seat back 401 is prohibited, but when the seat back 401 leans backward from the folded state, the intermediate stopper lever 501 is tilted. 501 slides down the step portion 503 of the cam surface 505, and the seat back 40
The backward tilt of 1 is never prohibited.

(8) Slide lock control mechanism 6
00, the shape of the cam drive arm 607 and the shape of the open lever 615 can be arbitrarily set to freely change the locking / unlocking timing of the seat slide mechanism 100.

[0065]

As described above, according to the first aspect of the present invention, when the reclining mechanism is unlocked and the seat back leans forward, the seat back can be seated. The intermediate lock mechanism for prohibiting the tilting of the seat back until the seat cushion comes into contact with the seat cushion, and the intermediate position after the seat back is in a seatable state when the seat back tilts forward. A slide lock control mechanism that unlocks the seat slide mechanism while the tilting is prohibited by the lock mechanism, unlocks the intermediate lock mechanism, and locks the seat slide mechanism until it abuts the seat cushion. With the provision of, the seat can be walked in and the seat back can be folded in a series of operations.

Further, the intermediate lock mechanism is unlocked to fold the seat back, and the intermediate lock mechanism is operated to return the folded seat back to the original position. That is, folding and unfolding of the seat back may be performed by operating only the intermediate lock mechanism, and the operation is consistent and the operability is good.

According to the second aspect of the present invention, when the seat back is tilted forward from the seatable state, the intermediate stopper lever comes into contact with the step portion on the cam surface of the cam, and the seat back is prevented from tilting forward. Further, when the seat back is in contact with the seat cushion, the intermediate stopper lever engages with the concave portion of the cam surface of the cam, and the tilting of the seat back is prohibited.

Further, when the seat back tilts backward from the folded state, the intermediate stopper lever slides down the step portion of the cam surface of the cam, and the seat back tilting is not prohibited.

According to the third aspect of the present invention, since the seat slide mechanism is unlocked by the slide lock control mechanism itself, the number of parts is small and the operation is reliable.

Further, since the open lever rotates when the seat back is tilted backward in order to return the seat back from the folded state to the seatable state, the seat slide mechanism can be locked → unlocked → locked. Disappear. That is, the seat slide mechanism is not unlocked when the seat back is tilted.

By arbitrarily setting the shape of the cam drive arm and the shape of the open lever, the timing of locking and unlocking the seat slide mechanism can be freely changed.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an overall configuration of a seat according to an embodiment.

FIG. 2 is an enlarged perspective view of the cam drive arm and open lever of FIG.

3 is a cross-sectional view taken along the section line C-C in FIG.

FIG. 4 is a perspective view illustrating a lock mechanism of the seat slide mechanism shown in FIG.

5A and 5B are views for explaining the operation of the seat shown in FIG.

FIG. 6 is a diagram for explaining the operation of the cam drive arm and open lever of FIG.

FIG. 7 is a diagram illustrating a vehicle with three rows of seats.

FIG. 8 is a diagram illustrating walk-in of the second seat of the vehicle of FIG. 7.

9 is a diagram illustrating folding of the second seat of the vehicle of FIG. 7.

[Explanation of symbols]

100 seat slide mechanism 201 seat cushion 300 reclining mechanism 401 seat back 500 Intermediate lock mechanism

Claims (3)

[Claims] 1. A seat main body including a seat cushion that supports the occupant's hips and a seat back that supports the occupant's back, a seat slide mechanism that adjusts the longitudinal position of the seat main body, and the seat. In a seat having a reclining mechanism that adjusts the tilt angle of the back, when the reclining mechanism is unlocked and the seat back leans forward, the seat back passes a state in which it can be seated and hits the seat cushion. An intermediate lock mechanism that prohibits the seat back from leaning forward until it comes into contact with the seat back, and an intermediate lock mechanism that prohibits tilting of the seat back in a state where the seat back contacts the seat cushion; and , The seat back is in a seatable state, and the forward locking is prohibited by the intermediate lock mechanism. The door slide mechanism to unlock the intermediate lock mechanism is unlocked, characterized in that and a slide lock control mechanism for locking the seat slide mechanism until the contact with the seat cushion sheet. 2. The intermediate lock mechanism is provided on one of the seat back side and the seat cushion side, and on the other of the seat back side and the seat cushion side, and the intermediate stopper lever is provided. And a biasing means for pressing the intermediate stopper lever against the cam surface of the cam, and a state in which the seat back can be seated on the cam surface of the cam. A step portion that prohibits sliding of the intermediate stopper lever and prohibits forward leaning of the seat back while tilting until it abuts against the seat cushion, and the seat back contacts the seat cushion. In this state, the intermediate stopper lever is engaged to form a concave portion for prohibiting the tilting of the seat back. 1 sheet described. 3. The slide lock control mechanism includes a cam drive arm that rotates with tilting of the seat back, and a protrusion that is rotatably provided on the cam drive arm and that can abut the cam drive arm. An open lever capable of contacting a slide lock lever of the seat slide mechanism; and a first urging means for urging the open lever in a direction in which a projection of the open lever contacts the cam drive arm. The sheet according to claim 1 or 2, characterized in that: