JP3325112B2 - Vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat installed on a floor of a vehicle such as a train or a bus, and more particularly to a vehicle seat in which a backrest is reclined with respect to a seat portion.

[0002]

2. Description of the Related Art Vehicle seats whose backrests are reclining have been generally applied to vehicles such as trains and buses used by an unspecified number of people. It is becoming possible to perform a comfortable journey or movement by reclining to a tilt position of the user's preference.

For example, Japanese Unexamined Utility Model Publication No. 1-68947 discloses that, in a seat mechanism in a vehicle having a backrest standing upright at a rear portion of a seat, a tip of the seat is pivotally supported by a pivot so as to be vertically rotatable. In addition, a seat structure in a vehicle, characterized in that the rear end can be raised upward, has been proposed. According to this seat structure, when the backrest portion is lowered, the entire seat portion is lifted and compared. Although the target flat surface can be formed by the backrest portion and the seat portion, it is not possible to freely adjust the posture according to the user's physique and the like. In other words, the seat structure proposed in Japanese Utility Model Application Laid-Open No. 1-68947 raises the seat in a substantially horizontal shape with the backrest falling down, and the upper surface of the seat is fixed to the upper surface of the backrest. It is designed to form a surface, does not sink the part where the weight of the person is heaviest, and shifts from the seat in consideration of the center point (hip point) when the person bends the body. Is not actively trying to prevent it.

[0004] That is, regarding this kind of conventional vehicle seat, the vehicle has been traveling a long distance, and the user has various physiques.
Simply reclining the backrest is not enough, and the following demands are being made.

[0005] (1) It is advantageous to recline the backrest at the same time as the back of the seat, so that the entire body of the user can be prevented from shifting forward. If it is too large, the balance of the user's body will be lost, making it impossible to take a comfortable posture. For this reason, it is required to set the optimal sinking of the seat in accordance with the reclining of the backrest.

(2) The front portion of the seat portion is projected from the front surface of the support base that supports the entire seat, for the reason that it is necessary to take sufficient space under the foot, for example. The sinking of the rear part of the seat has to be performed by rotation about the front upper end of the support base. Then, when the rear part of the seat is sunk, the front part of the seat will rise in reverse. Since the raised front portion of the seat will cause discomfort to the user's legs, there is a demand for lowering the raised front portion if possible.

(3) Further, the front end of the above-mentioned front portion of the seat portion is a portion of which the upper surface is in direct contact with the leg of the user, and this kind of vehicle seat is an unspecified number of people. It is designed and manufactured by assuming a person of a certain average physique so that it can be used. Therefore, for a person with a physique that deviates significantly from the assumed physique, this type of vehicle seat will not fit the body,
In particular, the fact that the front end of the seat hits the lower surface of the leg is extremely unpleasant when the aforementioned rear of the seat is submerged. For this reason, there is a demand that the adjustment of the front end of the seat can be performed separately from the adjustment of the front part of the seat described in (2) above.

(4) Further, in general, the reclining backrest is often formed separately from the seat portion. Naturally, it requires materials and labor, and increases the overall cost. In addition, cushioning is put in the backrest and the seat to provide cushioning and various body types. In this case, it is necessary to increase the amount of the cushion material or to adopt a cushion structure having a complicated structure, which also increases the cost. In other words, the side that manufactures this kind of vehicle seat requires a structure that can be manufactured at a low cost with a relatively simple structure that can provide sufficient cushioning action for users of all sizes. .

The inventors of the present invention have studied to make various improvements on how to make a seat capable of meeting the various requirements described above, and as a result, completed the present invention.

[0010]

SUMMARY OF THE INVENTION The present invention has been made based on the above-described background, and the problem to be solved is to provide a vehicle seat capable of reclining a backrest. A corresponding further adjustment is possible.

The object of the invention according to each claim is that even if the physique is different from that of a general person, it is possible to make adjustments in accordance therewith, and even a person of general physique can make his own optimal It is an object of the present invention to provide a vehicle seat having a simple structure in which a comfortable state can be freely adjusted.

[0012]

Means for Solving the Problems In order to solve the above problems, first, means according to the first aspect of the present invention will be described with reference numerals used in the embodiments. Supported by the support 10 fixed to the
In the vehicle seat 100 in which the backrest 30 is reclined, the front ends of the left and right support arms 21 constituting the seat portion 20 are connected to the front support rod 1 on the support base 10 side.
1 and the other end of a first free lock device 51 having one end connected to a rear support rod 22 which extends substantially horizontally between the rear portions of the two support arms 21. And a lower end of a frame 31 of a backrest 30 is rotatably connected to a rear end of each support arm 21 via a connection shaft 32.
An auxiliary arm 33 having a tip extending below the connecting shaft 32 is integrally connected to at least one side lower end of the first arm, and one end of a regulating link 40 is connected to a lower end of the auxiliary arm 33,
The vehicle seat 100 is characterized in that the other end of the restriction link 40 is rotatably connected to the support base 10 side.

That is, in the vehicle seat 100 according to the first aspect, the lower end of the frame 31 on the backrest 30 side is connected to the support arm 21 constituting the seat portion 20, and both support portions on the seat portion 20 side are supported. The rear support rod 22, which extends substantially horizontally between the arms 21, is connected to the support base 10 via a first free lock device 51. It is designed to sink.

Further, the vehicle seat 100 according to claim 1 is provided.
Is provided on one side of a frame 31 constituting the backrest 30 with an auxiliary arm 33 projecting below a rotation shaft 32 connecting the frame 31 and the support arm 21 on the seat 20 side. The other end of a restricting link 40 having one end connected to the connecting shaft 12 fixedly supported on the support base 10 side is connected to the auxiliary arm 33, and the backrest is connected by the restricting link 40. The rotation range of the auxiliary arm 33 on the 30 side is regulated. As described above, the rotation range of the lower end of the auxiliary arm 33 is restricted by the restriction link 40.
As a result, the reclining of the backrest 30 is increased in comparison with the sinking amount of the rear portion of the seat 20.

The means adopted by the vehicle seat 100 according to the second aspect is the same as that of the "support base 10 fixed on the floor of the vehicle.
, The backrest 30 reclines with respect to the seat portion 20.
The front ends of the left and right support arms 21 constituting the first support arm 21 are tiltably supported by the front support rod 11 on the support base 10 side, and are formed separately from the two support arms 21. 11 to extend forward from this
The other end of the second free lock device 52 is attached to a mounting portion 61 integral with the seat arm 60 so as to be rotatable. Vehicle seat 10 connected to the side
0 ".

That is, the vehicle seat 100 according to the second aspect is configured such that the front portion 20A of the seat portion 20 projects forward from the front surface of the support base 10, and the angle of the front portion 20A is adjusted. , Can be freely changed by operating the second free lock device 52. For this purpose, in the vehicle seat 100, the seat arm 60 projecting forward is formed separately from the support arm 21 of the seat 20, and the seat arm 60 is supported on the front of the support base 10. The second connecting member 23 which is rotatably connected to the rod 11 and which is integrated with the seat arm 60 and the connecting member 23 integrated with the lower rear surface of the support arm 21 on the seat 20 side. The free lock device 52 is interposed.

The vehicle seat 100 according to the third aspect is the same as the seat arm 6 of the vehicle seat 100 according to the second aspect.
An adjusting member 70 is further rotatably connected to the leading end of the zero. The adjusting member 70 is supported by a frictional force at a connecting portion of the seat arm 60. The user grips and rotates the adjusting member 70 from the surface material of the seat portion 20 on the surface side thereof. The angle with respect to the seat arm 60 is adjusted.

And, in order to solve the above-mentioned problem,
The means adopted by the invention according to claim 4 is described with the reference numerals used in the embodiment, which are described as follows: “Supported by a support base 10 fixed on the floor of a vehicle,
In the vehicle seat 100 which reclines at 0, the whole of the cushion plate 80 integrally formed in a substantially L-shaped cross section with plastic made of fiber-reinforced plastic is stored in the backrest 30 and the seat portion 20 and the cushion is Board 8
0 is rotatably mounted on a front support rod 11 located at a front upper part of the support base 10, and a connecting rod 81 is integrated with the upper end of the rear end of the cushion plate 80 so as to be substantially horizontal.
The vehicle seat 100 "is characterized in that both ends of the connecting rod 81 are engaged with the elongated holes 34a of the guide plate 34 fixed to the backrest 30 side.

That is, in the vehicle seat 100 according to the fourth aspect, substantially the whole of the seat portion 20 and the backrest 30 have a substantially L-shaped cross section, which is sufficient to receive the body and back of the user. A cushion plate 80 made of fiber reinforced having a large area is provided, and the cushion plate 80 has sufficient rigidity to support a person and a certain degree of flexibility.
For this reason, the cushion plate 80 of the vehicle seat 100
Is such that the whole is flexed and widened in accordance with reclining of the backrest 30, and is deformed to some extent according to the weight of the user.

[0020]

Next, the operation of the vehicle seat 100 according to each claim having the above-described structure will be described separately in terms of items. Before that, the common operation of the entire vehicle seat 100 will be described. It is as follows.

FIGS. 1 and 2 show a side view and a front view, respectively, of a vehicle seat 100 according to the present invention. The vehicle seat 100 is wrapped by one continuous facing material and connected to each other. The seat 20 and the backrest 30 are supported by the support base 10.
It is designed to be supported on the top, and is manufactured by mounting the continuous seat portion 20 and backrest 30 on the support base 10. Therefore, the seat 20 and the backrest 30
Are separately formed, and compared with the conventional one which is separately mounted on the support base 10, the vehicle seat 10
The manufacture of the entire 0 is easy.

In the vehicle seat 100,
The angles of the seat 20 and the backrest 30 are adjusted by a first free lock device 51 and a second free lock device 52, which will be described later. The device 52 includes the seat 20.
And its side is completely covered by the side plate 91 attached to the support base 10, so that nothing is caught or entangled during its operation. The security is ensured for use by a specified number of people. Note that an armrest 90 is provided above the side plate 91, and a first free lock device 51 or a second free lock device 52 is provided on the inner surface side of the armrest 90.
An operation button 92 for releasing the locked state is provided so that the first free lock device 51 and the second free lock device 52 can be operated at hand.

Further, in the vehicle seat 100, as shown in FIG. 1, the front portion 20A of the seat portion 20 is made to protrude more than the front surface of the support base 10, and
Thereby, a sufficient space for storing luggage or shoes in the lower front part of the seat portion 20 or for storing a foldable footrest (not shown) is ensured. Of course, the front part 20A of the seat part 20 is
Projecting from the front surface of the support base 10,
This makes it possible to store the user's feet in the lower part of 0A, thereby making it possible to make the posture of a person with long legs comfortable, for example.

The invention according to each claim can be applied not only to a two-seater vehicle seat 100 as shown in FIG. 2, but also to a one-seater or three-seater or more vehicle seat. However, when the present invention is applied to a two-seater one, it is advantageous because components can be commonly arranged between the two seats 20.

Regarding the vehicle seat 100 according to the first aspect, as shown in FIG. 3 to FIG. Of the first free lock device 51, one end of which is connected to a rear support rod 22 which extends in a substantially horizontal manner between the rear portions of the two support arms 21 and 21 while tiltably supporting the front support rod 11 of the first free lock device 51. A lower end of a frame 31 of a backrest 30 is rotatably connected to a rear end of each support arm 21 via a connection shaft 32,
At least one end of the backrest frame 31 is integrally connected to an auxiliary arm 33 whose tip extends below the connecting shaft 32, and one end of a regulating link 40 is connected to the lower end of the auxiliary arm 33. The other end of the regulation link 40 is rotatably connected to the support base 10 side.

That is, when the backrest 30 of the vehicle seat 100 is lowered from the position shown by the solid line in FIG.
In particular, the rear portion of the seat portion 20 and the lower end portion of the backrest 30 sink to the position shown by the imaginary line in FIG. As a result, backrest 3
The reclining of 0 causes the rear of the seat 20 to move to the front 20
Since it is lower than A, the entire body of the user in the comfortable posture is deeply supported by the seat 20 and the backrest 30 and does not shift forward.

Further, when the backrest 30 is reclined, the bending center (hip point) of the human body and
Since the bending center of the seat portion 20 and the backrest 30 does not significantly change due to the action of the restriction link 40 described below, when the backrest 30 is reclined, the lower surface of the user's body is seated. There is no large deviation from the surface formed by the backrest 20 and the backrest 30.
There is no need to adjust the body position relative to 00.

The reclining of the backrest 30 is performed by releasing the lock of the first free lock device 51 provided on the lower surface side of the seat portion 20 by operating the operation button 92 provided on the armrest 90. It is. First free lock device 51 and second free lock device 5 described later
Reference numeral 2 denotes a cylinder in which a fluid having a predetermined pressure is sealed, and the piston is moved relative to the cylinder by the flow of the pressure fluid or the force from the backrest 30. Normally, it is stopped and locked (a fixed state in which it does not expand and contract), and the operation of the operation button 92 allows the flow of the pressurized fluid so that it can be expanded and contracted. In the first free lock device 51 of the present embodiment, the pressure of the fluid in the cylinder is applied in the direction in which the backrest 30 stands, and if the operation button 92 is operated to release the lock, the backrest is released. The arm 30 automatically stands at the position shown by the solid line in FIG. When the backrest 30 is to be laid down, the user operates the operation button 92 to release the locked state of the first free lock device 51 and then applies force to the backrest 30. Thirty lodgings are to be made.

Now, the locked state of the first free lock device 51 as described above is released by the operation button 92.
When the user presses the backrest 30 with force, the force is transmitted from the lower end of the frame 31 of the backrest 30 to the support arm 21 of the seat 20, as shown particularly in FIG. 4. Since the support arm 21 is rotatably supported by the front support rod 11 of the support base 10, the rear end of the support arm 21 tends to be lowered by the force from the backrest 30 side. Since one end of the first free lock device 51 is connected to the rear end of the arm 21 via the rear support rod 22 and the connection member 23, the first free lock device 51 contracts. As a result, the backrest 30 is reclined to the position indicated by the imaginary line in FIG.

What is important when the backrest 30 is reclined is that since the rotation of the lower end of the backrest 30 is regulated by the regulation link 40, reclining is performed according to the hip point of a person of any size. That is. That is, the rotation of the backrest 30 is restricted by the restriction link 40, and as a result, the tilt of the backrest 30 is changed to
Made at an angle greater than that of zero, the reclining of the backrest 30 is made to fit everyone's physique.

The reason is as follows. First, back 3
As shown in FIG. 4, since the frame 31 of No. 0 is connected to the rear upper end of each support arm 21 on the seat portion 20 via the rotation shaft 32, the angle of the frame 31 can be freely adjusted with respect to the support arm 21. It can be changed. On the other hand, the regulation link 40
Has one end rotatably connected to the support base 10 side by a connection shaft 12, and the multiple ends of the restriction link 40 project downward from the rotation shaft 32 of the frame 31 on the backrest 30 side. Connected to the auxiliary arm 33. Of course,
The auxiliary arm 33 is fixedly connected to the frame 31 of the backrest 30. From the above, when the restricting link 40 is rotated from the position shown by the solid line in FIG.
Is connected to the support base 10 by the backrest 30
The side auxiliary arm 33 is pulled into the front side of the vehicle seat 100, and the backrest 30 falls more rearward.

Accordingly, the vehicle seat 1 according to the first aspect is provided.
According to 00, when the backrest 30 is reclined, the rear portion of the seat portion 20 sinks, and the backrest 30 is reclined at an angle larger than the sinking amount of the seat portion 20. Even a user with a large physique,
When the reclining is completed, the entire body can be reliably received by the seat portion 20 and the backrest 30. In addition, since the reclining amount of the backrest 30 is larger than the sinking of the seat portion 20, there is almost no difference between the user's hip point and the center of rotation of the backrest 30, so that the user shifts his body. The reclining of the backrest 30 can be performed without any trouble.

Regarding the vehicle seat 100 according to the second aspect, as shown in FIGS. 6 to 9, the vehicle seat 100 particularly supports the front ends of the left and right support arms 21, 21 constituting the seat portion 20. It is tiltably supported by the front support rod 11 on the side of the table 10 and is formed separately from the two support arms 21. The front support rod 11 extends forward from the front support rod 11 to be in front of the seat 20. The other end of the second free lock device 52 is connected to a rear lower surface of the support arm 21 to a mounting portion 61 integrated with the seat arm 60 by rotatably connecting a seat arm 60 constituting the portion 20A. It was done.

That is, the vehicle seat 100 is
The undulation of the front portion 20A can be freely adjusted within a certain range, and its movement will be described with reference to FIG. In a normal state in which the backrest 30 is not reclined, the front portion 20A of the seat portion 20 is at the position shown by the solid line in FIG. 9, but the user who feels that the front portion 20A is high is By operating the second free lock device 52, which will be described later, the front portion 20A is lowered to the position of the virtual line shown on the lower side in the figure. When the backrest 30 is reclined to the maximum, the front part 20A
Rises to the position of the imaginary line shown on the upper side of FIG. 9, but the user who feels that the height of the front portion 20A at that time is high is the second free lock device 52 as described above. Is operated to lower the front portion 20A to the position shown by the solid line in FIG. The operation button 92 for operating the second free lock device 52 is provided on the armrest 90 side separately from the operation button 92 on the first free lock device 51 described above. The operation of 52 can be easily performed by the user.

The front part 20A can be raised and lowered as described above because the seat part arm 60 is housed in the front part 20A, and this seat arm 60 is attached to the front support rod 1 on the support base 10 side.
This is because it is supported so as to be rotatable with respect to 1. The operation of the seat arm 60 can be performed by the second free lock device 52 because one end of the second free lock device 52 disposed below the seat portion 20 is connected to the support arm 21 constituting the seat portion 20. And the like, and the other end of the second free lock device 52 is connected to the seat arm 60 side. Of course, a support plate (not shown) is provided between the two seat arms 60 in a substantially horizontal manner, and the support plate supports the weight received by the front portion 20A.

Therefore, in the vehicle seat 100, the shape of the front portion 20A of the seat portion 20 can be freely changed according to the user's physique. It has excellent versatility that can be done in any of them.

Regarding the vehicle seat 100 according to the third aspect, in the vehicle seat 100, for example, a metal plate is provided at the tip of each of the seat arm 60 constituting the vehicle seat 100 according to the second aspect. The adjustment member 70 is provided by so-called friction bonding to the tip of each seat arm 60. That is, the adjusting member 70 is held with a certain frictional force with respect to each seat arm 60, and by applying a force against this frictional force to the adjusting member 70, the angle with respect to each seat arm 60 is adjusted. Can be changed freely. Of course, this adjusting member 70 is
(For example, completely covered by the cushioning material or the surface material of the seat portion 20).

By applying a force to the adjusting member 70 from the outside of the seating material of the seat portion 20, the position can be changed from the position shown by the solid line in FIG. 10 to the position shown by the imaginary line. That is, the front part 2 of the seat part 20 is provided on the lower surface of the user's leg.
However, if the front end 20a of the front portion 20A projects upward or forward, the user may feel uncomfortable, and the position of the front end 20a can be freely set. The vehicle seat 100 according to the third aspect of the present invention is adapted to be changed to the following.

Therefore, also in the vehicle seat 100, the shape of the front end portion 20a of the seat portion 20 can be freely changed according to the user's physique, so that easy use is easy for anyone. It is excellent in general versatility that can be performed even in. In particular, this vehicle seat 100
Since the adjusting member 70 is provided at the tip of the seat arm 60 of the vehicle seat 100 according to claim 2 described above, in addition to the change in the shape of the front part 20A of the seat part 20, the front part 20A
Since the tip portion 20a can be further changed,
As a whole, the shape of the seat portion 20 can be freely changed so that people of all physiques can sit comfortably.

Regarding the vehicle seat 100 according to the fourth aspect, in the vehicle seat 100, as shown in FIG. 11, the cushion plate 80 integrally formed in a substantially L-shaped cross section with a fiber-reinforced plastic. The whole is stored in the backrest 30 and the seat 20 and the cushion plate 8
0 is rotatably mounted on a front support rod 11 located at a front upper part of the support base 10, and a connecting rod 81 is integrated with the upper end of the rear end of the cushion plate 80 so as to be substantially horizontal.
Both ends of the connecting rod 81 are engaged in the elongated holes 34a of the guide plate 34 fixed to the backrest 30 side, and the cushion plate 80 provides sufficient cushioning and easy manufacturing of the entire vehicle seat 100. It is secured.

That is, in the vehicle seat 100, the portion in which the cushion plate 80 enters the seat portion 20 and the backrest 30 is formed integrally with a fiber-reinforced synthetic resin. It is possible to make full use of the flexibility of the 80 itself, so that the seat portion 20 and the backrest 30 can be integrally configured in appearance.

Of course, this cushion plate 80 itself
The vehicle seat 1 is capable of deforming so as to conform to the physique of a person seated on the vehicle seat 100, and having sufficient rigidity to support the weight of the user.
The amount of other cushioning materials in 00 can be reduced.
In particular, the upper end of the cushion plate 80 can freely move within the range of the elongated hole 34a with respect to the guide plate 34 provided on the backrest 30 side, and how the reclining state of the backrest 30 is changed. Even if it is, the cushion plate 80
Is freely changed, and users of all physiques can take a comfortable posture.

Next, a vehicle seat 100 according to each claim will be described.
1 and 2 will be described according to the embodiment shown in the drawings.
Since the vehicle seat 100 shown in FIG. 1 includes all of the inventions of the respective claims, the configuration of each part of the vehicle seat 100 will be described in place of the description of the invention of each claim.

The vehicle seat 100 shown in FIGS. 1 and 2 has a structure necessary for a vehicle, and has a support base 10 which is arranged and fixed on the floor of the vehicle.
A seat 20 and a backrest 30 assembled on the support base 10, a side plate 91 covering a lower portion of the backrest 30 and the side of the seat 20, and an armrest 90 provided on the side plate 91. Is what you are doing.

The support base 10 in this embodiment is constituted mainly by combining a front pillar and a rear pillar having a lower height than the front pillar, and the upper end of each front pillar has a seat. A front support rod 11 for tiltably supporting a front portion of the portion 20 is integrated substantially horizontally. The front end of each support arm 21 or the cushion plate 80 on the side of the seat portion 20 described later and the rear end of the seat arm 60 are rotatably connected to the front support rod 11. In order to enable the movement, the front support rod 11 is made of a so-called round material.

The rear column of the support base 10 is lower than that of the front column. However, as shown in FIG. 1 or FIG. This is to secure a space in which the lower end of the backrest 30 can sink freely. Further, to these rear columns, a column for the armrest 90 and the side plate 91 itself are connected. Of course, each pillar is integrated by a cross beam or the like, and the front end side of the first free lock device 51 is connected to the support base 10 using this cross beam as shown in FIG.

The seat 20 is, as shown in FIGS.
It has a pair of left and right support arms 21 that are substantially L-shaped and housed in both sides thereof, and the tip of each support arm 21 is rotatable with respect to the front support rod 11 on the support base 10 side. Is to be assembled. On the other hand, each support arm 2
As shown in FIG. 4, the rear portion of the frame 1 has a portion that rises upward.
1 is rotatably connected via a rotation shaft 32. Further, as shown in FIG. 5, the respective support arms 21 are integrated by a rear support rod 22 disposed on the rear side thereof. One end of a first free lock device 51 described later is connected to the member 23.

Of course, a predetermined cushioning material is packed between the support arm 21 and the rear support rod 22, and the whole of the cushioning material is covered with a covering material to form the seat portion 20. The seat portion 20 of the present embodiment is configured by housing a front portion of a cushion plate 80 having a substantially L-shaped cross section. Since the cushion plate 80 can secure a certain cushioning property, The thickness of the entire part 20 is formed to be relatively thin.

Further, the seat portion 20 according to the present embodiment is similar to that of FIG.
Alternatively, as shown in FIG. 10, the front part 20A protrudes from the front surface of the support base 10, and the front part 20A further has a front end part 20a.
The angle of the entire front portion 20A or the tip portion 20a is adjusted with respect to each support arm 21 or auxiliary arm 33 by a mechanism described later.

The backrest 30 is formed by mounting and mounting a support plate, a cushioning material, and the like around the frame 31. In this embodiment, the backrest 30 rises above the cushion plate 80 described above. It is configured by arranging parts inside. In other words, this back 30
Is continuous with the seat portion 20 via the cushion plate 80, and one common material is used as the surface material of the backrest 30 and the seat portion 20. Therefore, as compared with the case where the backrest 30 and the seat portion 20 are configured as separate bodies, the manufacture of the backrest 30 and the seat portion 20 and the manufacture of the vehicle seat 100 itself are easier. -ing

The lower end of the frame 31 of the backrest 30 is, as shown in FIG.
1 is rotatably connected via a rotation shaft 32. As shown in FIG. 5, an auxiliary arm 33 projecting below the rotation shaft 32 is integrated at one lower end of the frame 31.
The lower end of 3 is rotatably connected to the regulating link 40.
As a result, the frame 31 of the backrest 30 is rotatably connected to the support arm 21 on the seat portion 20 side by the rotation shaft 32, but the auxiliary arm 33 on the frame 31 side is connected to the restriction link 40. Because they are linked, the regulatory link 4
0 and the support arm 21 on the seat 20 side
It turns with respect to.

As shown in FIG. 4, the restriction link 40 is connected at its upper end to the connection shaft 12 fixedly attached to the support base 10 so as to be rotatable.
In the case of the two-seat vehicle seat 100 shown in FIG. And the connecting shaft 12 for connecting these regulating links 40 is
As shown in FIG. 5, each backrest 3 is located at the center of the vehicle seat 100.
It is attached substantially horizontally at a location where it does not interfere with 0.

On the other hand, on both upper sides of each backrest 30, FIG.
As shown in FIG. 1, a guide plate 34 having a vertically long hole 34a is fixedly arranged. In each of the long holes 34a, the upper end of the cushion plate 80 is horizontally positioned. The connecting rod 81 integrated into the shape is engaged at both ends.

As shown in FIGS. 3 to 5, the first free lock device 51 for controlling the movement of the seat 20 and the backrest 30 has one end substantially at the center of the rear support rod 22 on the seat 20 side. The other end of the first free lock device 51 is rotatably connected to the fixed connecting member 23.
It is connected to the side. This first free lock device 51 is similar to a second free lock device 52 described later,
The piston rod is configured to be expanded and contracted by the pressure fluid sealed in the cylinder. The flow of the pressure fluid in the cylinder is normally stopped (locked), and the flow of the pressure fluid is allowed. By doing so, the piston rod is extended or contracted. In this embodiment, the locked state of the first free lock device 51 is released by operating an operation button 92 provided inside the armrest 90. The same applies to the second free lock device 52 for performing the rotation operation of the seat arm 60 described below.

The seat arm 60 is connected to the front portion 20A of the seat 20.
The rear end is rotatably connected to the front support rod 11 on the support base 10 as shown in FIGS. 6 and 7. It was done. As shown in FIG. 7, the seat arm 60 is integrally provided with a mounting portion 61. The mounting portion 61 includes the second free lock device 52 described above.
Are connected at the front end. This second free lock device 52
7 is arranged on one side below the seat 20 as shown in FIGS. 7 and 8, and the rear end thereof is, for example, the seat 2.
The support arm 21 on the 0 side is connected to the rear lower surface side. In other words, the second free lock device 52 is
The support arm 21 moves in the same manner as the support arm 21 on the 0 side. Usually, the support arm 21 and the seat arm 60 form a straight line.
The angle of the seat arm 60 changes with respect to the support arm 21, resulting in the state shown by the phantom line in FIG. 9.

The front portion 20A of the seat portion 20 also
Since the weight of the user must be supported, a support plate is bridged between the seat arms 60 to secure rigidity at the bottom of the front portion 20A.

As shown in FIGS. 7 and 8, the lower end of the adjustment member 70 is frictionally connected to the tip of each seat arm 60 as described above. This adjusting member 70 is further attached to the front end 20A of the front portion 20A of the seat 20.
a, and stand up from the front end of each seat arm 60 toward the front upper part. Friction coupling means that if no force is applied,
While maintaining the connected state by frictional force,
This is a connection that is rotated when a force greater than a frictional force is applied.

As shown in FIG. 8, the adjusting member 70 in this embodiment has a size such that it covers substantially the entire front surface of the front end portion 20a of the seat portion 20. As shown in FIG. 10, the position can be freely changed by the user grasping and applying force.

FIG. 11 shows a side surface of a cushion plate 80 to be accommodated in the seat portion 20 and the backrest 30 constituting the vehicle seat 100. The cushion plate 80 has a substantially L-shaped cross section. It is shaped like a letter. In the present embodiment, the cushion plate 80 is formed by integrally impregnating a carbon fiber with a thermosetting resin and curing the resin, thereby integrally forming a predetermined cushioning property and rigidity. It is.

The front end of the cushion plate 80 is formed in a semicircular shape that is convex upward, and the front end is engaged with the front support rod 11 constituting the support base 10 by It is locked to the support base 10. Also,
A connecting rod 81 positioned horizontally is integrated with the upper end of the rising portion of the cushion plate 80.
Both ends of the connecting rod 81 are vertically movably accommodated in the elongated hole 34a of the guide plate 34 on the backrest 30 side, so that even when the cushion plate 80 is bent, It is firmly supported by the 30 side.

Further, the cushion plate 80 is
11 and has an area suitable for supporting the entire body of the user, and in particular, the portion to be stored in the seat portion 20 is shown in FIG. The rigidity is increased by integrally forming the reinforcing portion 82 as shown.

In the vehicle seat 100 according to the present embodiment, the support base 10 assembled in the factory is fixed on the floor of the vehicle, and the support base 10 is assembled as continuous in the factory. Seat 20 and backrest 3
0 are connected via each first free lock device 51 and second free lock device 52. Further, by arranging a side plate 91 to which the front support rod 11 is attached beside the seat portion 20 and the backrest 30 connected to the support base 10 and fixing the side plate 91 to the support base 10 side, It is completed as a vehicle seat 100. In other words, the vehicle seat 100 is formed into three main parts in a factory or the like, and is brought into the vehicle and assembled. Accordingly, the vehicle seat 100 can be manufactured, transported, and installed relatively easily.

[0062]

As described in detail above, according to the first aspect of the present invention, as shown in the above embodiment, "the support base 10 fixed on the floor of the vehicle and the seat 20 In the vehicle seat 100 in which the backrest 30 is reclined, the front ends of the left and right support arms 21 constituting the seat portion 20 are tiltably supported on the front support rod 11 on the support base 10 side. Both support arms 21
・ Rear support rod 22 spanned substantially horizontally between the rear portions of 21
The other end of the first free lock device 51 whose one end is connected to the support base 10 side, and the lower end of the frame 31 of the backrest 30 is rotated via the connection shaft 32 to the rear end of each support arm 21. At the same time, an auxiliary arm 33 whose tip extends below the connecting shaft 32 is integrally connected to at least one lower end of the backrest frame 31, and a regulating link 40 is connected to the lower end of the auxiliary arm 33. One end is connected, and the other end of the regulation link 40 is rotatably connected to the support base 10 side ". The vehicle seat can be provided with a simple structure that can be adjusted in accordance with the condition and that allows a person of general physique to freely adjust his / her own optimal comfort state.

In particular, the vehicle seat 10 according to claim 1
According to 0, when the backrest 30 is reclined, the rear portion of the seat portion 20 is made to sink, so that not only can the weight of the user be reliably supported, but also the user at the time of the distal end portion 20a. It is possible to prevent the body from shifting forward and to make it very comfortable. Moreover, the fact that the rear portion of the seat portion 20 sinks in accordance with the reclining of the backrest 30 means that a user of any physique can use the seat portion 20. Can be excellent in versatility.

The vehicle seat 10 according to claim 1
According to 0, since the reclining of the backrest 30 can be performed at an inclination angle larger than the sinking amount of the seat portion 20, there is no change in the user's hip point due to the reclining. It can completely eliminate the inconvenience that the person must correct the body.

Further, the above-mentioned effects are obtained by connecting the seat 20 and the backrest 30 to the support base 10 as described above, and by simply rotating the frame 31 of the backrest 30 with a short flat plate. Is achieved by restricting by the restriction link 40,
The vehicle seat 100 having such an effect can be manufactured very easily, and the seat portion 20 and the backrest 30 are made continuous, so that the cost of the entire vehicle seat 100 is reduced. You can do it.

According to the second aspect of the present invention, there is provided a vehicle seat 100 supported by a support base 10 fixed on a floor of a vehicle and configured to recline a backrest 30 with respect to a seat portion 20. The front ends of the left and right support arms 21 constituting the seat portion 20 are supported on the front support rod 11 on the support base 10 side so as to be tiltable.
A seat arm 60 which is formed separately from 21 and extends forward from the front support rod 11 and constitutes a front portion 20A of the seat portion 20 is rotatably connected to the front support rod 11. Arm 6
That is, the other end of the second free lock device 52 is connected to the lower surface of the rear portion of the support arm 21 to the attachment portion 61 integrated with the support arm 21. Thus, the physique is different from that of a general person. The vehicle seat can be adjusted accordingly, and a vehicle seat can be provided with a simple structure that allows a person of general physique to freely adjust his / her optimal comfort state.

In particular, the vehicle seat 10 according to claim 2
According to No. 0, in order to secure a space in front of the support base 10, even if the front part 20A of the seat part 20 protrudes larger than the front surface of the support base 10, the front part 20A is the seat part housed inside. The arm 60 is rotated by the second free lock device 52. Therefore, even if the backrest 30 is greatly reclined and the front portion 20A of the seat portion 20 projects forward and upward, it is lowered. You can do it. That is, the vehicle seat 100 in which the position of the front portion 20A can be adjusted can be made suitable for all seat portion 20 users.

According to the third aspect of the invention, the front end of the seat arm 60 of the vehicle seat 100 according to the second aspect is further housed in the front end portion 20a of the front portion 20A of the seat portion 20. The feature is that the adjusting member 70 is configured to be frictionally coupled, so that even if the physique is different from that of a general person, it can be adjusted accordingly, and even a person of general physique can make his / her own. A vehicle seat that can freely adjust the optimum comfort state can be provided by a simple structure.

In other words, the tip 20a, which is located at the tip of the front portion 20A of the seat 20, comes into contact with the lower surface of the leg of the user when the backrest 30 is moved to the tip 20a. The height of the distal end portion 20a can be reduced by the above-described configuration, and it is possible to prevent the user from feeling uncomfortable. The adjustment of the tip portion 20a may be performed according to the user's physique.
The vehicle seat 100 can be easily used by all people.

Further, in the invention according to claim 4,
"A vehicle seat 100 supported by a support base 10 fixed on the floor of a vehicle and reclining the backrest 30 with respect to the seat portion 20 is integrally formed in a substantially L-shaped cross section with a fiber-reinforced plastic. Molded cushion plate 80
Is stored in the backrest 30 and the seat portion 20, and the front end of the cushion plate 80 is rotatably mounted on a front support rod 11 located at the front upper portion of the support base 10, so that the cushion The connecting rod 81 is integrated with the rear upper end of the plate 80 so as to be substantially horizontal, and both ends of the connecting rod 81 are engaged with the elongated holes 34a of the guide plate 34 fixed to the backrest 30 side. " Has the characteristic of its structure, so that even if the physique is different from the general person, it can be adjusted according to it, and even the general physique can freely adjust his own optimal comfort state A vehicle seat that can be provided can be provided by a simple structure.

In particular, the vehicle seat 10 according to claim 4
According to 0, the seat portion 20 and the backrest 30 having different angles from each other can be configured as a continuous one, and the vehicle can be configured as compared with the case where the seat portion 20 and the backrest 30 are separately configured. The entire seat 100 can be manufactured at low cost.

Further, in the vehicle seat 100 according to the fourth aspect, the cushion plate 80 itself has both the cushioning property and rigidity required for the seat, so that the seat portion 20 and the backrest 30 are formed. Not only can the amount of cushion material used for this purpose be reduced, but also the cushion plate 80 itself can be made suitable for users of all physiques by freely sandwiching it.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle seat to which the present invention is applied.

FIG. 2 is a front view of the same.

FIG. 3 is a side view showing the vehicle seat according to the first embodiment with the side plate 91 removed.

4 is an enlarged view of a main part of the vehicle seat, and is a partial side view taken along line 1-1 in FIG. 5;

5 is a front view of a portion of the vehicle seat shown in FIG.

FIG. 6 is a side view showing a vehicle seat according to claims 2 and 3, wherein the configuration is extracted and shown;

FIG. 7 is an enlarged partial side view of a main part of FIG. 6;

FIG. 8 is a front view of the one shown in FIG. 7;

FIG. 9 is a partial side view centering on a front portion of the seat for illustrating operation of the seat arm.

FIG. 10 is a partial side view centered on a front end portion of a front portion for illustrating operation of an adjustment member.

FIG. 11 is a side view showing a cushion plate of the vehicle seat according to claim 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Vehicle seat 10 Support base 11 Front support rod 12 Connection shaft 20 Seat 20A Front 20a Tip 21 Support arm 22 Rear support rod 23 Connection member 30 Backrest 31 Frame 32 Rotating shaft 33 Auxiliary arm 34 Guide plate 34a Length Hole 40 Control link 51 First free lock device 52 Second free lock device 60 Seat arm 61 Attachment part 70 Adjusting member 80 Cushion plate 81 Connecting rod 90 Armrest 91 Side plate 92 Operation button

Claims (4)

(57) [Claims] 1. A vehicle seat supported by a support table fixed on a floor of a vehicle and configured to recline a backrest against a seat portion, wherein front ends of left and right support arms constituting the seat portion are connected to each other. The other end of the first free-lock device, which is tiltably supported on the front support rod on the support stand side and is connected at one end to a rear support rod that extends substantially horizontally between the rear portions of the two support arms, is supported. The lower end of the backrest frame is rotatably connected to a rear end of each of the support arms via a connection shaft, and the front end is attached to at least one lower end of the backrest frame. An auxiliary arm extending below the connection shaft is integrally connected, and one end of a restriction link is connected to a lower end of the auxiliary arm, and the other end of the restriction link is rotatably connected to the support base. Vehicle characterized by that Seats. 2. A vehicle seat supported on a support table fixed on a floor of a vehicle and configured to recline a backrest against a seat portion, wherein front ends of left and right support arms forming the seat portion are connected to each other. It is tiltably supported by the front support rod on the support base side and is formed separately from these two support arms, and extends forward from the front support rod to form a front portion of the seat. A seat arm to be rotatably connected to the seat arm, and the other end of the second free lock device is connected to a mounting portion integral with the seat arm to a rear lower surface of the support arm. seat. 3. An adjusting member having a lower end rotatably connected to a front end of the seat arm and an upper end protruding upward and forward of the seat arm to adjust the height of the front end of the seat. 3. The vehicle seat according to claim 2, wherein the adjustment member is entirely stored in a front end portion of the seat portion. 4. A vehicle seat supported on a support fixed on a floor of a vehicle and reclining a backrest against a seat portion, wherein the vehicle seat is integrally formed in a substantially L-shaped cross section with a fiber-reinforced plastic. The whole of the molded cushion plate is housed in the backrest and the seat portion, and the front end of the cushion plate is rotatably mounted on a front support rod located at a front upper part of the support base. A connecting rod is integrated into the rear upper end of the cushion plate so as to be substantially horizontal, and both ends of the connecting rod are engaged with the elongated holes of the guide plate fixed to the backrest side. seat.