JPH058676A - Seat for vehicle - Google Patents

Abstract

PURPOSE:To facilitate operation for turning a seat into a temporary bed by interlocking the lower end section of a seat back frame with the rear end section of a cushion frame. CONSTITUTION:A seat frame back frame 21 for a seat back 20, and a cushion frame 31 for a seat cushion 30 are interlocked in such a way as to be freely tilted or rotatable with respect to each side board frame 12 which comprises the seat frame 10 of a seat 100 for a vehicle while being located at both the sides of an user. This constitution thereby allows the seat back frame 21 whose lock has been released, to start tilting afterward while being pushed by the back of the user in the course of nature, and the seat cushion 30 concurrently starts rocking with respect to the seat frame 10, so that tip end of it is fairly moved upward. By this constitution, the seat 100 for the vehicle is turned into a temporary bed, so that the user can take a nap sufficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat which is installed in a vehicle such as a bus or a ship so that a seat cushion can be formed by the seat cushion and seat back.

[0002]

2. Description of the Related Art For example, in a long-distance bus that continues to run even at night, a seat configured to take a nap is adopted.

[0003] In the conventional seats that can be made to take a nap, that is, can also be configured as a nap, the seat back can be simply tilted greatly. However, this type of vehicle seat is, so to speak, installed in a packed state in order to effectively use the inside of the vehicle, and the seat back cannot be tilted completely horizontally. Therefore, when a temporary sleeper is configured with this type of vehicle seat, a person cannot completely lie down, and can only be configured as a "temporary" sleeper.

On the other hand, when converting a vehicle seat from a normal state to a temporary sleeper, the seat back is largely tilted down. In a conventional seat in general, for example, a user puts his / her foot on the floor. The seat back is laid down and the back is pushed down with strength. However, in such a posture, it is good at the beginning of the seatback to fall down, but since the strength is not strong at the final stage, the user has to do the troublesome work of holding the seatback and pushing it down. It wasn't. This is
The same is true when the seat back is raised, in short, the user had to change his / her posture in various ways in order to convert between the seat and the sleeper.

Further, when a seat of this kind is used as a temporary sleeper, the mechanism adopted in the conventional seat does not consider changes in the human body at all.
The operability was not good, coupled with the need to change the posture described above. Generally, when a user seated on a seat cushion tries to extend his / her body by tilting the seat back backward, that is, when the upper half of the body falls backward with respect to the lower half of the body, the upper half of the body is bent or twisted. The center of motion corresponds to the part corresponding to the hip bone of the human body, and this is called the hip point or trochanteric point.

Hereinafter, this center is referred to as the trochanteric point, but in a conventional seat, the trochanteric point and the tilting center of the seat back are completely different. A space is created between the seat and the seat, and the user's back, in particular, is displaced relative to the seat back (a so-called backrest phenomenon), resulting in an unstable and uncomfortable state. . Therefore, in this type of conventional seat, the user had to correct his posture when the seat back was tilted (whether it was tilted rearward or raised forward), and always kept in a comfortable state. I couldn't sustain it.

[0007] Therefore, the present inventors constructed a vehicle seat which, when used as a nap, can take a sufficient nap even if it is not configured to be a completely flat one, and can easily perform the conversion operation. The present invention has been completed as a result of various studies on how to do so.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation in a vehicle seat of this type.
The problem to be solved is inconvenience in conventional seats and insufficient rest.

The object of the inventions according to the claims is to make the operation for making a berth very easy by completely interlocking the seat back and the seat cushion, and to make a perfect flat surface. It is to provide a vehicle seat that can be fully rested without being configured. In particular, an object of the invention according to the fourth aspect is to provide a vehicle seat that can be used more comfortably in accordance with the natural movement of the human body.

[0010]

In order to solve the above-mentioned problems, the means adopted by the invention according to the first claim will be described with reference to the reference numerals used in the embodiments. On the other hand, in the vehicle seat 100 in which the seat back 20 and the seat cushion 30 are tiltably supported, and the seat back 20 and the seat cushion 30 also form a nap, the seat frame 10 and the legs 11 are provided. And a side plate frame 12 that is integrated on the leg 11 and supports the side plate, and is rotatably connected to the upper end of the side plate frame 12 to form a seat back 20. The seat back frame 21 is connected to the seat frame 10 in a tiltable manner by a first connecting arm 22 which is integrated with a lower portion of the seat back frame 21. And, front arms and an intermediate portion of the cushion frame 31 constituting the seat cushion 30, the upper end is pivotally connected to the upper front side plate frame 12 32
Supported by the seat back frame 2
1 is a vehicle seat 100 "characterized in that the lower end of the seat 1 and the rear end of the cushion frame 31 are interlockably connected.

In addition, the means adopted by the invention according to the second aspect is likewise "supporting the seat back 20 and the seat cushion 30 with respect to the seat frame 10 so as to be tiltable, and these seat back 20 and seat Cushion 3
A vehicle seat 1 that also constitutes a berth by 0
00, the seat frame 10 is configured to include a leg portion 11 and a side plate frame 12 that is integrated on the leg portion 11 and supports a side plate, and is rotatable at the upper end of the side plate frame 12. The seat back frame 21 is tiltably connected to the seat frame 10 by the first connecting arm 22 that is connected to the seat back frame 21 that is integrated with the lower portion of the seat back frame 21 that forms the seat back 20. The intermediate portion and the rear end of the constituent cushion frame 31 are connected to the front arm 32 whose upper end is rotatably connected to the upper front part of the side plate frame 12, and the upper end are rotatably connected to the upper rear part of the side plate frame 12. And a rear arm 33 that supports the rear end of the cushion frame 31 by a second connecting arm 23. A seat padding 100, wherein "that it has pivotally connected.

Further, the means adopted by the invention according to the third aspect is likewise "a seat back 20 and a seat cushion 30 are tiltably supported with respect to the seat frame 10 so that the seat back 20 and the seat cushion 20 can be tilted. Cushion 3
A vehicle seat 1 that also constitutes a berth by 0
00, the seat frame 10 is configured to include a leg portion 11 and a side plate frame 12 that is integrated on the leg portion 11 and supports a side plate, and is rotatable at the upper end of the side plate frame 12. The seat back frame 21 is tiltably connected to the seat frame 10 by the first connecting arm 22 that is connected to the seat back frame 21 that is integrated with the lower portion of the seat back frame 21 that forms the seat back 20. The intermediate portion of the constituent cushion frame 31 is tiltably supported by a front arm 32 whose upper end is rotatably connected to the upper front portion of the side plate frame 12, and the lower end portion of the seat back frame 21 and the rear of the cushion frame 31 are supported. The vehicle seat 100 ″ is characterized in that the ends thereof are rotatably connected by a connecting pin 40.

The means adopted by the invention according to the fourth claim is the side plate frame 12 of the first connecting arm 22 which constitutes the inventions according to the above-mentioned first to third claims. The connection position with respect to is substantially configured to coincide with the trochanteric point of the user who uses the vehicle seat 100.

[0014]

Actions and Modes of Use of the Invention The actions of the vehicle seat 100 according to the present invention configured as described above will be described separately in terms of modes of use.

Regarding the vehicle seat 100 according to the first claim, first, the vehicle seat 100 can be used also as a temporary sleeper as shown in FIG. 1, and when it is not used as a temporary sleeper. Is used as a normal seat as shown in FIG. Therefore, the seat back 20 and the seat cushion 30 are attached to the seat frame 1
It is supported so as to be tiltable with respect to zero.

That is, in the vehicle seat 100, the seat back frame 21 for the seat back 20 is provided for each side plate frame 12 which constitutes the seat frame 10 and is located on both sides of the user. Also, the cushion frame 31 for the seat cushion 30 is tiltably or rotatably connected, and the seatback frame 21 and the cushion frame 31 are connected so as to be interlockable with each other. If the user puts a lot of effort into the cushion frame 31, the seat back frame 2 will be moved depending on the direction of the force.
1 and the cushion frame 31 swings with respect to the side plate frame 12 just like a cradle.

That is, when the user wants to change the vehicle seat 100 from the state shown in FIG. 2 to the state shown in FIG. 1, the following is done. That is, after the fixing state of each part is released by each stopper device, the user applies a little force to the body to extend it. At this time, the user may be in a state in which the entire body is on the vehicle seat 100, that is, the legs are not on the floor, as shown in FIG. That is,
The user sits on the vehicle seat 100 in a posture in which he / she can remove his shoes and lie down completely to lie down and stretch his body as described above.

Then, the seat back 20 is naturally pushed by the user's back to start tilting rearward, and at the same time, the seat cushion 30 swings with respect to the seat frame 10 and, as shown in FIG. In particular, the tip moves slightly upward. It should be noted that an example in which a footrest is also provided for the seat cushion 30 is shown, and the footrest moves upward together with the seat cushion 30. As described above, if the user exerts a force on the seat back 20 and the seat cushion 30, the seat back 20 and the seat cushion 30 will be in the state as shown in FIG. It suffices to operate the stopper device to fix each part at that position. Of course, when the seat backs 20 and the seat cushions 30 are tilted, the force of each actuating device can be utilized.

As a result, in the vehicle seat 100, as shown in FIG. 1, the seat backs 20 and the seat cushions 30 form a nap, so that the user can take a sufficient nap. .

In the case where the tilting of the seat back 20 and the swinging of the seat cushion 30 are performed in conjunction with each other, the seat back frame 21 of the seat back 20 is provided with the side plate by the first connecting arm 22 provided at the lower end thereof. Frame 12
When the connecting pin 24 is provided at or near the trochanter, the seat back 20 and the seat cushion 30 move and the user's body shifts. There is no instability. That is, in the vehicle seat 100, when the normal use state is changed to the temporary sleeper, the user's body changes in a stable state. Of course, this is the same when returning from the temporary sleeper to the normal state.

-Vehicle seat 100 according to the second claim Also in this vehicle seat 100, its seat back 2
0 and the seat cushion 30 incline or swing like a cradle with respect to the side plate frames 12 located on both sides of the user.
The same as the above, and it can also be used as a temporary sleeper as shown in FIG.

When the vehicle seat 100 is in a normal use state as shown in FIG. 2, the seat back frame 21 of each seat back 20 and the cushion frame 31 of the seat cushion 30 are different from the seat frame 10 shown in FIG. It is in the state shown in. That is, in the seat back frame 21 of the seat back 20, the tip portion of the first connecting arm 22 integrally connected to the lower portion thereof is connected to the upper end of the side plate frame 12 of the seat frame 10 by the connecting pin 24, that is, the user's trochanter. It is rotatably connected through points. As a result, the seat back frame 21 rotates about the connecting pin 24.

On the other hand, the rear end of the crescent-shaped second connecting arm 23 is rotatably connected to the end of the seat back frame 21, and the tip end of the second connecting arm 23 is the seat cushion 30. It is connected to the rear end of the cushion frame 31. Accordingly, when the user of the vehicle seat 100 exerts a force to extend the body, the seat back 20 is tilted rearward by the force, and the seat cushion 3 is interlocked with the tilt of the seat back 20.
0 moves as follows.

The cushion frame 31 of the seat cushion 30 has a front arm 32 whose upper end is connected to the upper front portion of the side plate frame 12 of the seat frame 10 and whose lower end is connected to a rear portion on the cushion frame 31 side, and an upper end. Is connected to the seat frame 10 by a rear arm 33 connected to the side plate frame 12 and the mounting plate 14 integrated with the side plate frame 12 and the lower end thereof connected to the rear end of the cushion frame 31. Of course, seat frame 1
The side plate frames 12 of 0 are located on the left and right sides of the seat cushion 30, and accordingly, the cushion frame 31
Is a pair of left and right front arm 32 and rear arm 3
The rear end portion of the cushion frame 31 is supported by 3, and the cushion frame 31 can swing like a cradle around the upper ends of the side plate frames 12, so to speak.

The cushion frame 31 of the embodiment described below is also supported by an auxiliary arm 32a which is arranged at substantially the same position as the front arm 32 and is connected to the front end bulging portion of the first connecting arm 22. That is
With this auxiliary arm 32a, the cushion frame 31
It is designed to guide the swing of the. In other words, the auxiliary arm 32a connects the cushion frame 31 to the side plate frame 12
Is supported in a more reliable state,
The cushion frame 31 swings in a stable state.

The vehicle seat 1 according to the first claim.
Like 00, the seat back frame 21 of the seat back 20 can be interlocked with the cushion frame 31 of the seat cushion 30 mainly by the second connecting arm 23 connected to the rear end of the cushion frame 31. is there. In other words, the seat back 20 and the seat cushion 30 change from the state shown in FIG. 2 with respect to the seat frame 10 to the state shown in FIG. 1 in association with each other. Of course, in the vehicle seat 100, the seat backs 20 and the seat cushions 30 are provided, as will be described in the following embodiments.
Actuator 25 for assisting tilting of the vehicle, and each seat back 2
0 and a stopper device 35 for fixing the state of the seat cushion 30 at the tilted position.

Therefore, when the user wants to change the vehicle seat 100 from the state shown in FIG. 2 to the state shown in FIG. 1, the following is done. That is, after the fixing state of each part is released by each stopper device, the user applies a little force to the body to extend it. At this time, the user may be in a state in which the entire body is on the vehicle seat 100, that is, the legs are not on the floor, as shown in FIG. That is,
The user sits on the vehicle seat 100 in a posture in which he / she can remove his shoes and lie down completely to lie down and stretch his body as described above.

Then, the seat back 20 is naturally pushed by the user's back to start tilting rearward, and at the same time, the seat cushion 30 swings with respect to the seat frame 10 and, as shown in FIG. In particular, the tip moves slightly upward. It should be noted that an example in which a footrest is also provided for the seat cushion 30 is shown, and the footrest moves upward together with the seat cushion 30. As described above, if the user exerts a force on the seat back 20 and the seat cushion 30, the seat back 20 and the seat cushion 30 will be in the state as shown in FIG. It suffices to operate the stopper device to fix each part at that position. Of course, when the seat backs 20 and the seat cushions 30 are tilted, the force of each actuating device can be utilized.

As a result, in the vehicle seat 100, as shown in FIG. 1, the seat backs 20 and the seat cushions 30 form a nap, so that the user can take a sufficient nap. .

About the vehicle seat 100 of the third claim The use of the vehicle seat 100 according to the third claim is almost the same as the vehicle seat 100 of the above-mentioned first or second claim, It differs from others in the following points.

That is, in the vehicle seat 100, the cushion frame 31 constituting the vehicle seat 100 is suspended by the front arm 32 rotatably connected to the side plate frame 12 at the intermediate portion thereof. The rear end of the cushion frame 31 is rotatably connected to the lower end of the seat back frame 21 by a connecting pin 40. Of course, the seat back frame 21 has the first connecting arm 2 fixed to the portion located above the connecting pin 40.
By connecting the upper end of 2 to the connecting pin 24 on the side plate frame 12 side, it is supported by each side plate frame 12. Therefore, the cushion frame 31 includes the connecting shaft 36 connecting the front arm 32 to the side plate frame 12 and the first connecting arm 22.
Side plate frame 1 located between the connecting pin 24 connecting the
2 is a fixed side and is a single link configured through the first connecting arm 22 and the front arm 32, and swings in conjunction with tilting of the seat back frame 21 within a range defined by the link. It moves.

In this vehicle seat 100,
One end of the actuating device 25 is located below the first connecting arm 22,
Further, the other end of the actuating device 25 is attached to the seat frame 10
Since it is connected to the side, the seat back 20 is tilted by the force of the actuating device 25.

-Vehicle seat 100 according to the fourth claim Regarding this vehicle seat 100, the basic thing is each vehicle seat 10 according to the above-mentioned first to third claims.
0, but in particular, the seat back frame 21 of the seat back 20 and the side plate frame 1 of the seat frame 10.
When the connection pin 24 of the first connection arm 22 that is connected to the vehicle 2 is configured to substantially coincide with the trochanter of the user on the vehicle seat 100, It has an effect.

That is, when the seat back 20 and the seat cushion 30 tilt together, the tilting of the seat back 20 and the seat cushion 30 is performed about the connecting pin 24, and the connecting pin 24 and the user's trochanter. Since the points substantially coincide with each other as shown in FIG. 8, the seat backs 20 and the seat cushions 30 can be tilted without any difficulty. Also, for the user, since the connecting pin 24 is a fixed point that is fixed to the seat frame 10 and does not move at all, each seat back 20 and the seat cushion 3 are fixed.
Even if 0 is tilted in conjunction with each other, there is no gap formed between these and the body, so that there is no sense of anxiety and there is no need to shift or move the body.

In other words, when this passenger seat 100 constitutes a nap, the user must
Each seat back 2 after putting the body completely on top
0 and the seat cushion 30 can be tilted, and the tilting operation of the seat back 20 and the seat cushion 30 can be performed only by the operation of extending the body while keeping the body in close contact therewith. Therefore, the user can operate the vehicle seat 100 very easily and effortlessly.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a vehicle seat 100 according to each invention will be described according to the embodiments shown in the drawings. The vehicle seat 100 according to the first claim is according to the second or third claim. Since it is substantially included in it, the vehicle seat 100 according to the second claim will be mainly described here.

FIG. 1 shows a vehicle seat 100 according to the present invention.
Is shown as a berth, and this vehicle seat 10
Reference numeral 0 mainly includes a seat frame 10, a seat cushion 30 supported by the seat frame 10 on which a user sits, and a seat back 20 also supported by the seat frame 10 for leaning the user. The vehicle seat 100 shown in FIG. 1 is actually used, and has side plates on both sides of the seat cushion 30, and armrests are mounted on the side plates. Also,
In front of the seat cushion 30, there is provided a footrest for allowing the user to extend his / her legs, and on both sides of the seat cushion 30, a folding table and a television receiver are attached. .

The seat frame 10 which constitutes the vehicle seat 100 is as shown in FIGS. 3 and 4, and the leg portions 11 for supporting the entire vehicle seat 100 on the floor are provided. A pair of left and right side plate frames 12 are integrated on the leg portion 11 via a connecting frame 13.
In this embodiment, each side plate frame 12 and the connecting frame 1
3 is constructed by bending a so-called pipe material.
Further, on the upper part of the side plate frame 12, a mounting plate 14 for integrally forming a rear arm 33 for a seat cushion 30, which will be described later, is provided. The side plate frame 12
A side plate as shown in FIGS. 1 and 2 is attached to the outer side of the.

The seat back frame 21 for the seat back 20, which is supported behind the seat frame 10 as shown in FIGS. 3 and 4, is integral with the lower portion of the seat back frame 21. The tip end of the first connecting arm 22 attached to is rotatably connected to the upper end of each side plate frame 12 in the seat frame 10 via a connecting pin 24. That is, the center of rotation of the seat back frame 21 is the connecting pin 24 of the side plate frame 12, and the connecting pin 24 can substantially coincide with the trochanteric point of the user who uses the vehicle seat 100. It's a place. Therefore, when the user applies force to the seat back 20 with his / her back or the like, the seat back frame 21 can be naturally rotated about the connecting pin 24, that is, the trochanter. . The connecting seat 24 provided at the trochanter of the human body serves as the vehicle seat 100 according to the fourth aspect.

A crescent-shaped second connecting arm 23 is rotatably connected to a lower end portion of the seat back frame 21, and the second connecting arm 23 is attached to a rear end portion of a cushion frame 31 described later. Is also rotatably connected.
Further, a lower end portion of the first connecting arm 22 connecting the seat back frame 21 to the side plate frame 12 is bulged, and an upper end of the auxiliary arm 32a on the seat cushion 30 side is rotated by the bulging portion. It is freely connected. That is, the seat back frame 21 includes the first connecting arm 22, the connecting pin 24 on the side plate frame 12 side, and the second connecting arm 2.
3 and the cushion frame 31 on the side of the seat cushion 30
The seat back 20 and the seat cushion 30 can be interlocked with each other by connecting the respective rear end portions. Of course, the operating device 25 is connected to the lower end of the seat back frame 21, and the tip of the operating device 25 is connected to the seat frame 10 side.
0 can always return to the state shown in FIG.

The second connecting arm 23 connecting the lower end of the seat back frame 21 and the rear end of the cushion frame 31 is limited to the crescent-shaped one as shown in the embodiment. Not a thing. That is,
The second connecting arm 23 in this embodiment has a crescent shape so as not to interfere with other members when it moves, but the lower end portion of the seat back frame 21 and the rear end portion of the cushion frame 31 are formed. If you can connect within a certain range while changing the distance,
It may have any shape.

The cushion frame 31 forming the seat cushion 30 is supported by the front arm 32 and the rear arm 33 on the upper side of each side plate frame 12 forming the seat frame 10 as follows. It is designed to be able to swing with respect to the upper end of the frame 12. That is, the upper and lower ends of the front arm 32 are seated on the seat back 20.
The upper part of the side plate frame 12 and the upper part of the rear part of the cushion frame 31 which are included in the rear frame 33 are rotatably connected to each other. The cushion frame 31 is rotatably connected to the rear end of the cushion frame 31.

In this embodiment, in addition to the front and rear arms 32 and 33, the cushion frame 31 is supported on the side plate frame 12 by the auxiliary arm 32a substantially parallel to the front arm 32 and the front end of the first connecting arm 22. It is also carried out by connecting to the bulging portion formed in the above. The auxiliary arm 32a assists the cushion frame 31 when it is unstable only by being supported by the front and rear arms 32 and 33.
If the cushion frame 31 is sufficiently supported by 33 and 33, it is not always necessary. However, when this auxiliary arm 32a is used, the configuration of the front and rear arms 32 and 33 themselves and their connecting points can be relatively simplified.

In the lower part of the cushion frame 31, a return spring 34 and a stopper device 35 which are interposed between the cushion frame 31 and the seat frame 10 side are connected and housed. That is, the return spring 34 urges the cushion frame 31 so as to always return to the state shown in FIG. 3, and the return spring 34 on the seat cushion 30 side and the actuating device 25 on the seat back 20 side described above. Both of these actions help the seat back 20 and the seat cushion 30 to return from the state shown in FIG. 1 to the state shown in FIG. On the other hand, the stopper device 35 prevents the user from operating the seat back 20 and the seat cushion 30 against the actions of the actuator 25 on the seat back 20 side and the return spring 34 on the seat cushion 30 side as shown in FIG. When it is turned on, the state is fixed. The specific configuration of this stopper device 35 in this embodiment is such that a coiled spring is wound around a rod that can move freely, and when the rod is tightened by this spring, the movement of the rod is stopped. The whole is fixed.

It should be noted that the vehicle seat 100 according to the present embodiment.
Has a structure in which the seat back 20 bends in the middle, and the armrest changes its position in accordance with the tilting of the seat back 20, the detailed structure of which is directly related to the structure of the present invention. Since it does not, the description is omitted. Furthermore, in this vehicle seat 100, a footrest is deployed in front of the seat cushion 30, but a detailed description of this configuration will be omitted for the reasons described above.

FIGS. 5 to 7 show a vehicle seat 100 according to the third claim. This vehicle seat 100 has the following points in addition to the vehicle seat 100 according to the second claim described above. Except for this, it has the same configuration. Among the constituent members of the vehicle seat 100 in the third claim, the same constituent members as those in the second claim are designated by the same reference numerals in the drawings and the details thereof are omitted.

In the vehicle seat 100 according to the third aspect, as shown in FIG.
A cushion frame 31 for 0 is suspended from each side plate frame 12 by a front arm 32 and a seat back frame 21. The front arm 32 has its upper end rotatably connected to the front portion of the upper side of the side plate frame 12 by a connecting shaft 36.
The lower end of 2 is rotatably connected to a substantially middle portion of the cushion frame 31. The front arm 3
A return spring 34 is connected to the lower end of 2, and the return spring 34 is connected to a part of the seat frame 10. The return spring 34 cooperates with an actuating device 25, which will be described later, to rapidly swing the cushion frame 31. This is done so that it does not happen and in a stable state. And
A connecting pin 40 is provided at the rear end of the cushion frame 31, and the lower end of the seatback frame 21 is rotatably connected to the connecting pin 40. As a result, the cushion frame 31 interlocks with the tilting of the seat back frame 21.

As shown in FIG. 7, the seat back frame 21 of the vehicle seat 100 according to the third aspect of the present invention has the first connecting arm 22 at a lower end portion thereof which is located above the connecting pin 40. Are integrally connected, and the upper end of the first connecting arm 22 is rotatably connected to a portion located on the upper side of the side plate frame 12 and behind the connecting pin 24. That is, this seat back frame 21
Within the range defined by the first connecting arm 22,
For example, it is tilted from the state shown in FIG. 5 to the state shown in FIG. In the present embodiment, the front arm 32 is formed by connecting one end of the actuating device 25, the other end of which is connected to the seat frame 10 side, to the first connecting arm 22.
The seat back frame 21 itself is tilted by the actuating device 25 in cooperation with the force of the return spring 34 connected to the side. In this embodiment, as shown in FIG. 7, a part of the seat belt is connected to the first connecting arm 22 for the seat back frame 21.

[0049]

As described above, in the invention according to the first claim, since it is constructed as exemplified in the above embodiment, the operation when the vehicle seat 100 is desired to be a temporary sleeper is very easy. Moreover, the seat back 20 and the seat cushion 30 can provide sufficient rest without forming a completely flat surface.

A vehicle seat 100 according to the second claim.
According to the seat back frame 2 of the seat back 20
1 is rotatably connected to the upper end of the side plate frame 12 on the seat frame 10 side by the first connecting arm 22, and the cushion frame 31 of the seat cushion 30 is connected to each side plate frame 12 by the front arm 32 and the rear arm 33. By connecting the seat back frame 21 to the cushion frame 31 side of the seat cushion 30, the seat back 2 can be swingably connected.
Since the 0 and the seat cushion 30 can be interlocked with each other, when the user wants to use the vehicle seat 100 as a berth, the unfolding operation can be easily performed by applying a force to extend the body. You can do it. Moreover, when the seat backs 20 and the seat cushions 30 are unfolded as described above, the vehicle seat 100 is sufficient for a person to take a rest even if the seat backs 20 and the seat cushions 30 do not completely form a flat surface. It can be shaped.

Further, the vehicle seat 10 according to the third aspect.
0 has the same effect as the vehicle seat 100 according to the first and second claims, and also the cushion frame 3
In the support of No. 1, a part of the side plate frame 12 fixed between the connecting pin 24 and the connecting shaft 36 is fixed side,
Since it is performed by one link constituted by the front arm 32 and the first connecting arm 22, the seat cushion 30 itself can be rocked in an extremely stable state. Moreover, by adopting such a simple configuration, it is possible to provide the vehicle seat 100 with few failures and easy maintenance.

The vehicle seat 10 according to the fourth aspect.
According to 0, since the seat back 20 can be rotated about the connecting pin 24 that substantially coincides with the trochanter of the user, the operation for using the vehicle seat 100 as a temporary sleeper is performed by a person. To provide a vehicle seat 100 that can be sufficiently adjusted to the natural movements of the body of the vehicle and can be easily operated, and can also take sufficient rest when used as a nap. Can be done.

[Brief description of drawings]

FIG. 1 is a perspective view of a vehicle seat according to the invention of the first or second claim when it is used as a temporary sleeper.

FIG. 2 is a side view of the passenger seat in a normal use state.

FIG. 3 is a side view showing each component shown in FIG.

FIG. 4 is a side view when the respective constituent members shown in FIG. 3 are changed to the state shown in FIG.

FIG. 5 is a side view showing essential components of a vehicle seat according to a third aspect of the present invention.

FIG. 6 is a side view showing essential components when the vehicle seat shown in FIG. 5 is used as a temporary sleeper.

FIG. 7 is a partial side view showing an enlarged main part of FIG.

FIG. 8 is a side view showing the positional relationship of the trochanteric points when the seat back is greatly tilted.

[Explanation of symbols]

100 vehicle seats 10 seat frame 11 legs 12 side plate frame 13 connection frame 14 Mounting plate 20 seat back 21 seat back frame 22 First connection arm 23 Second connecting arm 24 connecting pin 25 Actuator 30 seat cushion 31 cushion frame 32 front arm 33 Rear arm 34 Return spring 35 Stopper device 36 connecting shaft 40 connecting pin

Claims (4)

[Claims] 1. A vehicle seat in which a seat back and a seat cushion are tiltably supported with respect to a seat frame, and the seat back and the seat cushion also constitute a temporary sleeper. A seat that is configured to include a leg portion and a side plate frame that is integrated on the leg portion and supports the side plate, and is a seat that is rotatably connected to the upper end of the side plate frame and that constitutes the seat back. The seat back frame is tiltably connected to the seat frame by a first connecting arm that is integrated with a lower portion of the back frame, and a middle portion of a cushion frame that constitutes the seat cushion has an upper end of the side plate frame. Of the seat back frame, which is tiltably supported by a front arm rotatably connected to an upper front side of the seat back frame. Seat padding, characterized in that it has linked to interlocked with the end portion and a rear portion of the cushion frame. 2. A vehicle seat in which a seat back and a seat cushion are tiltably supported with respect to a seat frame, and the seat back and the seat cushion also constitute a berth, wherein the seat frame comprises: A seat that is configured to include a leg portion and a side plate frame that is integrated on the leg portion and supports the side plate, and is a seat that is rotatably connected to the upper end of the side plate frame and that constitutes the seat back. The seat back frame is tiltably connected to the seat frame by a first connecting arm that is integrated with a lower portion of the back frame, and a middle portion and a rear end of a cushion frame that constitutes the seat cushion are connected to each other by an upper end. A front arm rotatably connected to the upper front part of the side plate frame and an upper end rotatably connected to the upper rear part of the side plate frame. And a rear arm that is tiltably supported, and a lower end portion of the seat back frame and a rear end portion of the cushion frame are rotatably connected by a second connecting arm. 3. A vehicle seat in which a seat back and a seat cushion are tiltably supported with respect to a seat frame, and the seat back and the seat cushion also form a temporary sleeper. A seat that is configured to include a leg portion and a side plate frame that is integrated on the leg portion and supports the side plate, and is a seat that is rotatably connected to the upper end of the side plate frame and that constitutes the seat back. The seat back frame is tiltably connected to the seat frame by a first connecting arm that is integrated with a lower portion of the back frame, and a middle portion of a cushion frame that constitutes the seat cushion has an upper end of the side plate frame. Of the seat back frame, which is tiltably supported by a front arm rotatably connected to an upper front side of the seat back frame. Vehicle seat, characterized in that pivotally connected to a rear end portion of the cushion frame and the end portion by a connecting pin. 4. The structure according to claim 1, wherein a connecting position of the first connecting arm with respect to the side plate frame is configured to substantially coincide with a trochanter of a user of the seat. The vehicle seat described in Crab.