JP2002192998A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat for a vehicle capable of keeping the back of a seat back horizontal when the seat back is inclined forward by using a usual reclining seat without using a reclining seat with a two-step hinge, and effectively utilizing a table. SOLUTION: A striker engaging with a jump lock on the rear side of a seat cushion frame is made movable vertically, a lock mechanism of the striker capable of locking in the upper limit position and the lower limit position of the striker and a lock releasing mechanism of the striker releasing the lock state are installed. In the state that the seat back is inclined forward, an operating knob is operated to release the lock in the lower limit position of the striker, the striker is made moveable vertically, the rear side of the seat cushion is drawn up together with the striker, the operating knob is released to lock the striker in the upper limit position, and thereby, the seat cushion can be inclined and fixed. As a result, the back of the set back can be utilized as a horizontal table surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat having a flip-up mechanism suitable for minivans, wagons, and the like, and more particularly, to a seat cushion in which a seat back is tiltably attached to a seat cushion via a recliner. For vehicles that release the lock between the flip-up lock provided on the rear edge of the seat cushion frame and the striker on the floor panel, allowing the seat to be flipped forward with the front edge of the seat cushion frame as the flip-up center. Regarding the sheet.

[0002]

2. Description of the Related Art Normally, as shown in FIG. 12, a vehicle seat 1 has a seat back 3 attached via a recliner 4 to a seat cushion 2 on which an occupant sits, and the recliner 4 is operated. Thereby, the occupant can obtain a predetermined backrest angle. When the back of the seat back 3 is used as a table, the seat back 3 is used by leaning forward.

However, in the general-purpose recliner 4, a base plate 4a attached to the seat cushion 2 and
The arm plate 4b attached to the seat back 3 is hinged, and the hinge position is at a low position. Therefore, even if the seat back 3 is brought forward, the rear surface 3a of the seat back 3 is not horizontal. However, it is inevitably in an angled state indicated by α in the figure.

As a recent trend, in a one-box car or the like, in order to enhance the functionality of the seat, the seat back 3 is moved forward and used as a table, so that as shown in FIG. Further, there has been proposed a configuration in which the rear surface 3a of the seat back 3 becomes horizontal when the seat back 3 is tilted forward by employing a two-stage hinge type recliner 5 provided with a folding plate 5c.

[0005]

As described above, in the general-purpose recliner 4, when the seatback 3 is moved forward, the rear surface of the seatback 3 does not become a horizontal surface. 5, the cost of the recliner 5 rises,
Since a simple appearance was not obtained and the structure of the recliner 5 was complicated, there was a necessity for giving an uncomfortable feeling to the occupant.

[0006] By the way, a flip-up type seat used for a minivan or a wagon car has a front edge of the seat cushion frame with a hinge centered on a front edge of the seat cushion frame in a state where a seat back is tilted forward on a seat cushion. When detached from the floor panel, the entire seat can be flipped forward with the front edge of the seat cushion as a hinge center.

In view of the above, the inventor of the present invention has been able to adjust the position of the rear side of the seat cushion up and down in the state where the lock of the rear side of the seat cushion is released in the flip-up type seat. We focused on the ability to adjust the angle of inclination of the back of the seat back that was moved forward.

The present invention focuses on the mechanism of a flip-up seat, and even when a conventional inexpensive general-purpose recliner is used, when the seat back is moved forward, the back surface of the seat back can form a horizontal surface, and can be effectively used as a table. It is an object of the present invention to provide a vehicle seat capable of achieving the following.

[0009]

In order to achieve the above object, a vehicle seat according to a first aspect of the present invention is provided such that a seat back is attached to a seat cushion via a recliner so that the seat back can be tilted. Release the lock between the flip-up lock provided on the rear edge of the seat cushion frame and the striker on the floor panel, and use the front edge of the seat cushion frame as the flip-up center.
In a vehicle seat in which the seat can be flipped forward, the striker is built in the floor panel so as to be able to move up and down, and the striker can take a seat use form at a lower limit position of the striker and a table use form at an upper limit position. The striker lock mechanism and the lock release mechanism that can be locked and unlocked at the upper limit position and the lower limit position, and lift the seat cushion and striker upward while maintaining the engagement state of the seat side flip-up lock and striker. By locking the striker at the upper limit position, the rear surface of the seat back that has been moved forward on the seat cushion is horizontal.

According to the vehicle seat of the first aspect, the striker engaged with the flip-up lock (hook) provided on the lower surface of the seat cushion frame is built in the floor panel so as to be vertically movable. Since the striker has a striker lock mechanism and lock release mechanism that can lock and unlock the striker at the upper limit position and the lower limit position, simply moving the seat back forward on the seat cushion leaves the back of the seat back on an inclined surface. However, when the striker is unlocked,
If the rear edge of the seat cushion is pulled upward together with the striker and the striker is locked at this raised position, the seat cushion can be fixed at a predetermined tilt angle, and the rear surface of the seat back can be leveled.

Therefore, even if a general-purpose recliner is used without using a two-stage hinged recliner, the rear surface of the seat back can be made horizontal.

Next, in the vehicle seat according to a second aspect of the present invention, the striker lock mechanism and the unlock mechanism are housed and supported in a vertically movable manner with respect to a base bracket built in the floor panel. And a lock bracket that is spring-biased in the locking direction and is rotatably supported within the base bracket, and locks a lock bar welded and fixed to the striker at the lower and upper positions of the striker, and rotates the lock bracket. It is characterized by comprising an operation knob attached to a seat cushion frame for operating and releasing the locked state of the striker, and a wire cable connecting the operation knob and the lock bracket.

According to the second aspect of the invention, when the operation knob is operated, the lock bracket is rotated by the wire cable, and the lock bracket is released from the engagement with the lock bar of the striker. This allows the striker to move up and down.

Then, while continuing to operate the operation knob, pull up the rear portion of the seat cushion together with the striker and release the operation knob at a position where the rear surface of the seat back becomes a horizontal plane. When the lock bracket locks the lock bar of the striker, The striker is locked at the upper limit position and locked at the rear of the seat cushion and at the position where the striker is raised.

Accordingly, the rear surface of the seat back can be effectively used as a table, and the operation of the operation knob is transmitted to the lock bracket via the wire cable. Therefore, the configuration is simple and can be realized at low cost.

According to a third aspect of the present invention, there is provided a vehicle seat, wherein the striker locking mechanism and the unlocking mechanism include a striker housed and supported in a vertically movable manner with respect to a base bracket built in the floor panel. A lock bracket that is spring-biased in the locking direction and is rotatably supported in the base bracket, and locks a lock bar welded and fixed to the striker at the lower and upper positions of the striker, and pivots the lock bracket. Then, an operation knob attached to the seat cushion frame for releasing the locked state of the striker, a link arm built inside the seat cushion frame and rotated by a pulling operation of the operation knob, and a rotation operation of the link arm, The tip protrudes and presses the lock bracket to lock Characterized in that comprising a push rod and dividing.

According to the vehicle seat of the third aspect, when the operation knob is operated, the link arm built in the seat cushion frame is rotated, and is linked with the link arm. Is pushed downward from the seat cushion frame and presses the lock bracket built in the floor panel in the unlocking direction, so that the striker can move up and down. In this state, the striker moves upward with the seat cushion. Then, by releasing the operation knob at the upper limit position of the striker, the seat cushion can be fixed at a predetermined tilt angle, and the rear surface of the seat back can be a horizontal table surface.

According to this mechanism, the lock mechanism for locking at the upper limit position and the lower limit position of the striker is built in the floor panel, and the lock release mechanism for releasing the lock mechanism is separately provided inside the seat cushion. When the seat is mounted on the floor panel, the lock bracket of the lock mechanism and the pressing rod of the lock release mechanism only need to be assembled facing each other. It suffices to arrange them in separate unit configurations on the panel side and the seat side, respectively.
Assembly can be simplified.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a vehicle seat according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing the overall configuration of a vehicle seat according to the present invention, FIG. 2 is an explanatory diagram showing a relationship between a flip-up lock and a striker in the vehicle seat in a normal state (when the seat is used),
3 is an explanatory diagram of a configuration of a striker in the vehicle seat, FIG. 4 is an explanatory diagram of a configuration of an operation knob for unlocking the striker, FIG. 5 is an explanatory diagram showing an operation state of the operation knob, and FIG. FIG. 7 is an explanatory view showing the operation of the striker at the time of operation of FIG. 7, FIG. 7 is an explanatory view showing a flip-up lock and a state in which the striker is lifted up in the vehicle seat according to the present invention, and FIG. FIG. 9 is an explanatory view showing a state in which the seat cushion and the striker are lifted upward and the back surface of the seat back is horizontal.

FIGS. 10 and 11 show another embodiment of a lock release mechanism for releasing the lock at the upper limit position and the lower limit position of the striker. FIG. 10 shows a normal state, and FIG.
FIG. 1 is an explanatory view showing a flip-up lock and a striker in a table state.

First, the overall structure of a vehicle seat 10 according to the present invention will be described with reference to FIG. 1. The vehicle seat 10 is applied to a minivan, a second seat of a wagon car, etc., and a seat on which an occupant sits. Cushion 11
The seat back 12 serving as an occupant's back is attached via a general-purpose recliner 13 so that the seat back 12 can be adjusted to a predetermined backrest angle.

When the seat back 12 is tilted forward, the hinge position of the recliner 13 is at a low position, and as shown by a dotted line in FIG.
2a is a state inclined at an angle of θ with respect to the horizontal plane.

The vehicle seat 10 according to the present invention.
Is applied to the second seat of the minivan, and the front edge portion 14a of the seat cushion frame 14 of the seat cushion 11 is provided so that the vehicle space can be effectively secured.
Is hinged to the hinge bracket 15a of the floor panel 15, and the rear edge 14b of the seat cushion frame 14 is lockable and unlockable with the floor panel 15. By operating the flip-up knob 16, the seat Rear edge 14b of cushion frame 14
To unlock the seat cushion frame 1
4, the space is effectively secured by flipping forward on the basis of the front edge portion 14a. still,
Reference numeral 15b indicates a floor carpet.

By the way, according to the present invention, when the seat back 12 is put forward on the seat cushion 11, a rear mechanism of the seat cushion frame 14 is formed so that the rear surface 12a of the seat back 12 can form a horizontal plane. In that it has been improved.

That is, as shown in FIG. 2, a flip-up lock 17 is provided on the rear surface on the rear side of the seat cushion frame 14.
Is provided. Then, inside the floor panel 15 corresponding to the flip-up lock 17, a flip-up lock 1 is provided.
7 and the base bracket 21
Is supported so that it can move up and down, and striker 2
It is characterized in that a lock mechanism capable of locking at an upper limit position and a lower limit position of 0 and a lock release mechanism capable of releasing a locked state are provided.

2 and 3, each leg 20a of the striker 20 is inserted into an insertion hole 21a formed in the lower wall of the base bracket 21, so that the striker 20 can be moved up and down by the base bracket 21. Supported by
The upper end 20 b of the striker 20 is engaged (locked) with the flip-up lock 17.

A lock bar 22 extending laterally across each leg 20a of the striker 20 has a striker 2
The lock bar 22 is inserted into a guide hole 23 that is vertically long in the side wall of the base bracket 21, and is fixed to the upper end 23 of the guide hole 23.
When the lock bar 22 moves between the position a and the lower end 23b, the striker 20 moves up and down corresponding to the stroke.

To lock the lock bar 22 in the guide hole 23 at the upper end 23a and the lower end 23b of the guide hole 23, the lock bracket 24 is attached to the base bracket 21.
Is rotatably mounted on a side wall of the lock bracket 24 via a pin 24a.
Locks the striker 20 while holding the lock bar 22, and a spring 25 is mounted between the lower end of the lock bracket 24 and the base bracket 21 so as to bias the striker 20 in the locking direction. The above is the lock mechanism of the striker 20.

One end 26a of the wire cable 26 is connected to the lock bracket 24 in order to rotate the lock bracket 24 in a direction for releasing the locked state of the lock bracket 24, that is, in a counterclockwise direction in the drawing. It is fixed to.

As shown in FIGS. 2 and 4, an operation knob 30 is rotatably mounted on a bracket 31 mounted on the rear side of the seat cushion frame 14 by a pin 32. The other end 26b of the wire cable 26 described above is locked. still,
The route of the wire cable 26 is desirably the shortest route as long as the pulling force from the operation knob 30 can be effectively transmitted to the lock bracket 24 side. A guide roller or the like for smoothly guiding the wire cable 26 may be provided.

Therefore, in the state shown in FIGS. 2 to 4, the flip-up lock 17 provided on the rear side of the seat cushion frame 14 and the striker 20 built in the floor panel 15 are in a locked state. In addition, since the striker 20 is at the lower limit position, the normal seat use mode in which the occupant can sit on the seat 10 is shown.

Next, as shown in FIG. 5, by pulling up the operation knob 30 in the direction of the arrow in the figure, the wire cable 26
As a result, as shown in FIG. 6, in the lock mechanism of the striker 20, the lock bracket 24 is rotated in the direction indicated by the arrow in FIG.
4b and rock bar 2 welded to striker 20
When the engagement state between the striker 20 and the striker 20 is released, the striker 20 becomes vertically movable.

As a result, when the rear side of the seat cushion 11 is lifted upward, the seat cushion frame 1
The striker 20 also moves up in the direction of the arrow along with the flip-up lock 17 of 4, and can be raised until the lock bar 22 reaches the upper limit position of the guide hole 23.

When the lock bar 22 is positioned at the upper end 23 a of the guide hole 23, that is, when the striker 20 reaches the upper limit position, the lock bracket 24 is released from the operating knob 30 by releasing the operating knob 30. As a result, the projection 24b of the lock bracket 24 is located at the lower end of the lock bar 22, and the lock bar 22 and the striker 20 are securely locked at this position.

FIG. 7 shows a state in which the rear side of the seat cushion 11 is lifted up and locked together with the striker 20 in this manner. In this state, striker 20
Is at the upper limit position, the striker 20 and the flip-up lock 17 for locking the striker 20 are also at the raised position, and the seat cushion frame 14 and the seat cushion 11
The rear side is locked in an upwardly inclined state.

In order to use the back surface 12a of the actual seat back 12 as a table surface, the seat back 12 is first moved forward by operating the recliner 13 as shown in FIG. At this time, from the relation of the hinge position of the recliner 13, the back surface of the seat back 12 is inclined by the angle θ in the drawing with respect to the horizontal plane. Then, by pulling up the operation knob 30, the striker 20
Is set to be able to move up and down.

Next, as shown in FIG. 9, if the entire rear side of the seat 10 is lifted upward, the striker 20 is also raised, and when the striker 20 reaches the upper limit position, the operator releases the operation knob 30. The vertical movement of the striker 20 is restricted, and the striker 20 is locked at the upper limit position.

As shown in the drawing, if the vertical movement stroke of the striker 20 is adjusted so that the seat cushion frame 14 is locked in a state of being inclined by an angle θ with respect to the horizontal plane, the seat back 12 The back surface 12a can form a horizontal plane.

As described above, according to the present invention, the striker 20 can be moved up and down by using the general-purpose flip-up mechanism and the recliner 13, and the lock mechanism that can lock the striker 20 at the upper limit position and the lower limit position. In addition, by providing the lock release mechanism, the seat back 12
When the seat cushion 11 and the striker 20 are lifted upward, and the hand is released from the operation knob 30, the seat back 1 is moved forward.
2 can easily be configured as a horizontal surface,
Even if an inexpensive recliner is used without using a conventional two-stage expensive recliner, a horizontal table surface can be obtained, which is preferable for ease of use, and because the appearance of the recliner is simple, the appearance is also preferable. .

Further, a lock mechanism which enables the striker 20 to move up and down between the upper limit position and the lower limit position and can be locked at the upper limit position and the lower limit position, and a lock release mechanism for releasing the locked state may be provided. Since the flip-up lock mechanism can be used as it is, it is very useful.

FIGS. 10 and 11 show a second embodiment of the vehicle seat 10 according to the present invention, and show a specific example in which the lock release mechanism is improved. Note that the overall configuration of the seat 10, the lock mechanism of the striker 20, and the like are the same as those in the first embodiment, and thus detailed description thereof will be omitted.

In the second embodiment, the operation knob 3
It is characterized in that a lock release mechanism for operating the lock bracket 24 in the lock release direction by the operation of 0 is built in the seat cushion frame 14 as a separate unit from the lock mechanism.

That is, inside the cushion frame 14,
Link arm 40, tension rod 41 connected between link arm 40 and operation knob 30, link arm 40
The push rod 42 and the link arm 4 which are connected to the
And a spring 43 for urging 0 in one direction.

More specifically, the pull rod 41 is linked to the operating knob 30 by a link connecting portion 41a.
The other end is link-connected with the link arm 40 and the link connecting portion 41b. Next, the link arm 40 is rotatably supported based on a rotation center 40a, and is urged in a clockwise direction in FIG.

Then, the link arm 40 and the pressing rod 4
2 is linked to the end of the pressing rod 42 by a link connecting portion 42a, and the pressing rod 42 is guided by the guide portion 44 so that the operating force is reliably transmitted to the lock bracket 24.

That is, when the operation knob 30 is pulled up in the counterclockwise direction in FIG. 10, the pull rod 41 is pulled rearward, so that the link arm 40 is moved to the rotation center 4.
0a, it also rotates counterclockwise, so that the pressing rod 42 is pressed downward, the lower end 42b of the pressing rod 42 presses the lock bracket 24 on the lock mechanism side, and the lock bracket 24 is turned counterclockwise. By rotating clockwise, the engagement between the protrusion 24b of the lock bracket 24 and the lock bar 22 is released, and the striker 20 is allowed to move up and down.

FIG. 11 shows a state in which the operating knob 30 has been operated. In this state, the lower end 42b of the pressing rod 42 presses the lock bracket 24 to maintain the unlocked state. Cushion 11
When the striker 20 is lifted up together with the flip-up lock 17 when the rear side is lifted upward, and when the striker 20 comes to the upper limit position, the striker 20 is locked at the upper limit position by releasing the operation knob 30. The cushion 11 is in a tilted state, and the rear surface of the seat back 12 that is tilted forward on the seat cushion 11 can form a horizontal table surface.

As described above, according to the second embodiment of the present invention, if the rear side of the seat cushion 11 is lifted upward by operating the operation knob 30 in a state where the seat back 12 is tilted forward, the striker 20 is also moved. By ascending, the seat cushion 11 can be tilted to make the back surface of the seat back 12 a horizontal plane, and can be effectively used simply as a table surface.

According to the second embodiment, the first
Since the lock release mechanism is built in the seat cushion frame 14 instead of the connection method of the wire cable 26 of the embodiment, the routing route of the wire cable 26 is set and connected to the operation knob 30 and the lock bracket 24, respectively. The lock mechanism of the striker 20 and the lock release mechanism of the striker 20 are configured as separate units, and when the seat cushion 11 is assembled to the floor panel 17, the lock mechanism 24 is pressed against the lock bracket 24. Since it is sufficient to assemble the rods so as to face each other, there is an advantage that the assembling operation can be simplified.

[0050]

As described above, claim 1 of the present application.
According to the vehicle seat described in the above, the flip-up lock (hook) provided on the lower surface of the seat cushion frame
The striker is engaged with the floor panel so as to be able to move up and down.The striker has a lock mechanism and an unlock mechanism that can lock and unlock the striker at the upper limit position and the lower limit position. The back of the seat back remains inclining only by leaning forward on the cushion, but when the striker is unlocked, the rear edge of the seat cushion is pulled up together with the striker, and if the striker is locked in this raised position, the seat The cushion can be fixed at a predetermined tilt angle, the back of the seat back can be horizontal,
Even if a general-purpose recliner is used without using a two-stage hinged recliner, the back surface of the seat back can be made a horizontal surface and can be effectively used as a table.

Further, according to the vehicle seat according to the second aspect of the present application, when the operation knob is operated, the lock bracket is rotated by the wire cable, and the lock bracket is engaged with the lock bar of the striker. Is released, the striker can move up and down,
Pull up the rear of the seat cushion together with the striker while continuing to operate the operation knob and release the operation knob at the position where the back of the seat is horizontal, the lock bracket locks the striker's lock bar, and the striker is at the upper limit position The lock is locked, the rear of the seat cushion and the striker are locked at the raised position, the back of the seat back can be used as a table, and the operation of the operation knob is transmitted to the lock bracket via a wire cable, so the configuration is simple. Therefore, it can be realized at low cost and has an effect of high practicality.

According to the vehicle seat according to the third aspect of the present invention, when the operation knob is operated, the link arm built in the seat cushion frame rotates and is linked to the link arm. The push rod has its tip protruding downward from the seat cushion frame and presses the lock bracket incorporated in the floor panel in the unlocking direction, so that the striker can move up and down, and in this state the striker is seated. Pulling the cushion upwards and releasing the operation knob at the striker's upper limit position, the seat cushion can be fixed at a predetermined tilt angle, the back of the seat back can be a horizontal table surface, and the effect is rich in practicality. Have.

According to this mechanism, the lock mechanism for locking the striker at the upper limit position and the lower limit position is built in the floor panel, and the lock release mechanism for releasing the lock mechanism is separately provided inside the seat cushion. When the seat is attached to the floor panel, the lock bracket of the lock mechanism and the pressing rod of the unlock mechanism only have to face each other. , Can be configured as separate units on the sheet side, respectively, which has an effect that assembly can be simplified and assembly workability is excellent.

[Brief description of the drawings]

FIG. 1 is a side view showing the overall configuration of a first embodiment of a vehicle seat according to the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a flip-up lock and a striker in a normal use state of the seat in the vehicle seat shown in FIG. 1;

FIG. 3 is a structural explanatory view showing a lock mechanism portion of the striker shown in FIG. 2;

FIG. 4 is a structural explanatory view showing an operation knob for unlocking the striker shown in FIG. 3;

FIG. 5 is an explanatory diagram showing an operation state of an operation knob shown in FIG. 4;

FIG. 6 is a configuration explanatory view showing an unlocked state of the striker shown in FIG. 3;

FIG. 7 is an explanatory view showing a locked state of the striker in the raised position in the first embodiment of the vehicle seat according to the present invention.

FIG. 8 is a side view showing the vehicle seat according to the first embodiment of the present invention in a state where the seat back is tilted forward;

FIG. 9 is a side view showing a table use state of the vehicle seat according to the first embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a relationship between a flip-up lock and a striker in a normal use state of the vehicle seat according to the second embodiment of the present invention.

FIG. 11 is an explanatory diagram showing an unlocked state of the striker shown in FIG. 10;

FIG. 12 is an explanatory view showing a conventional vehicle seat.

FIG. 13 is an explanatory view showing a vehicle seat using a conventional recliner with a two-stage hinge.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 vehicle seat 11 seat cushion 12 seat back 12 a seat back rear 13 recliner 14 seat cushion frame 15 floor panel 16 flip up knob 17 flip up lock 20 striker 21 base bracket 22 lock bar 23 guide hole 24 lock bracket 25 spring 26 wire cable Reference Signs List 30 operation knob 40 link arm 41 tension rod 42 pressing rod 43 coil spring 44 guide section

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B62D 25/20 B62D 25/20 G // A47C 7/02 A47C 7/02 D

Claims (3)

[Claims] 1. A seat back is attached to a seat cushion via a recliner so as to be tiltable, and a lock state between a flip-up lock provided on a rear edge portion of the seat cushion frame and a striker on a floor panel is released. A vehicle seat in which a seat can be flipped forward with a front edge of a seat cushion frame as a center for flipping up, wherein the striker is built in a floor panel so as to be vertically movable, and the seat is used at a lower limit position of the striker. , A striker lock mechanism and a lock release mechanism that can be locked and unlocked at the upper and lower positions of the striker so that the table can be used at the upper limit position, and the seat side flip-up lock and the striker are engaged. While maintaining the seat cushion Lift fine striker upward, by locking the striker at the upper limit position, the vehicle seat, characterized in that the back of the seat back that is ahead on the seat cushion and a horizontal plane. 2. A striker lock mechanism and a lock release mechanism, wherein the striker is housed and supported in a vertically movable manner with respect to a base bracket built into the floor panel, and is spring-biased in the lock direction and is turned into the base bracket. A lock bracket that is movably supported and locks the lock bar welded and fixed to the striker at the lower and upper positions of the striker, and a seat cushion frame that rotates the lock bracket to unlock the striker 2. The vehicle seat according to claim 1, comprising an operation knob to be attached, and a wire cable connecting the operation knob to the lock bracket. 3. A striker lock mechanism and a lock release mechanism, wherein the striker is housed and supported in a vertically movable manner with respect to a base bracket built in the floor panel, and is spring-biased in the lock direction and is turned into the base bracket. A lock bracket that is movably supported and locks the lock bar welded and fixed to the striker at the lower and upper positions of the striker, and a seat cushion frame that rotates the lock bracket to unlock the striker An operation knob to be attached, a link arm built in the seat cushion frame and rotated by pulling up the operation knob, and a pivoting operation of the link arm causes the tip to protrude and press the lock bracket to release the locked state. Claims: Item 4. A vehicle seat according to item 1.