JPH07250729A - Vehicle seat - Google Patents

Abstract

PURPOSE:To provide a vehicle seat which can be regulated according to body build, even when differed from a general body build, and, even in case of a person having the general body build, regulated to the most comfortable state for itself with a simple structure. CONSTITUTION:The front ends of lateral support arms 21 constituting a seat part are supported by a front support beam 11 on a support base 10 side in such a manner as to be capable of tilting, and one end of a first free lock device 51 the other end of which is connected to a rear support beam 22 laid nearly horizontally between the rear parts of the support arms 21 is connected to the support base 10 side. The lower end of a seat back frame 31 is rotatably connected through a connecting shaft 32 to the rear end part of each support arm 21. An auxiliary arm 33 having the top end extended downward over the connecting shaft 32 is integrally connected to at least one-side lower end of the seat back frame 31, one end of a regulating link 40 is connected to the lower end of the auxiliary frame 33, and the other end of the regulating link 40 is rotatably connected to the support base 10 side.

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 the floor of a vehicle such as a train or a bus, and more particularly to a vehicle seat in which a backrest reclines with respect to a seat portion.

[0002]

2. Description of the Related Art Vehicle seats in which the backrest can be reclined are generally applied to vehicles such as trains and buses used by an unspecified large number of people, and the user must wear the backrest. By reclining to the inclination position of your choice, you can travel or move comfortably.

For example, Japanese Utility Model Laid-Open No. 1-68947 discloses, "In a seat mechanism in a vehicle in which a backrest is erected at the rear of a seat, a tip of the seat is pivotally supported in a vertical direction by a pivot. In addition, a seat structure in a vehicle characterized in that its rear end can be raised upward is proposed. According to this seat structure, when the backrest is tilted, the entire seat is lifted and compared. Although a flat surface can be formed by the backrest and the seat, it is not possible to freely adjust the posture according to the physique of the user. In other words, according to the seat structure proposed in Japanese Utility Model Laid-Open No. 1-68947, the seat portion is lifted in a substantially horizontal direction with the reclining of the backrest portion, and the upper surface of the seat portion is fixed by the upper surface of the backrest portion. It is designed to form a surface and does not sink the part where the person's weight is most heavy, and also considers the center point (hip point) when the person bends the body and shifts from the seat It is not what we are trying to prevent.

In other words, with respect to the conventional vehicle seat of this type, the vehicle has come to travel a long distance, and the user has various physiques.
Simply reclining is not enough, and the following demands are being made.

(1) When the back portion of the seat portion is depressed at the same time as the reclining of the backrest, it is advantageous that the entire body of the user can be prevented from shifting forward, but the depression of the seat portion If the crowd is too large, the balance of the user's body will be lost, and a comfortable posture cannot be taken. For this reason, it is required to set the optimum depression of the seat portion according to the reclining of the backrest.

(2) The front portion of the seat portion is in a state of being protruded from the front surface of the support base that supports the entire seat, for the reason that it is necessary to take a sufficient space for the feet, and the above-mentioned condition is provided. The depression of the rear part of the seat must be performed by rotating the support base around the front upper end. Then, when the rear part of the seat is depressed, the front part of the seat rises up. Since the raised front part of the seat part hits the user's leg and causes discomfort, there is a demand to lower the raised front part if possible.

(3) Further, the front end of the above-mentioned front portion of the seat portion is a portion whose upper surface directly abuts on the leg of the user, and moreover, this type of vehicle seat is designed for an unspecified number of people. It is designed and manufactured with the assumption that a person of a certain average size will be used. Therefore, for a person who has a physique that greatly deviates from its expected physique, this type of vehicle seat will not fit the body,
Particularly, the tip of the seat portion hitting the lower surface of the leg is extremely unpleasant when the rear portion of the seat portion is depressed as described above. Therefore, there is a demand for the tip of the seat portion to be able to be adjusted in addition to the adjustment of the front portion of the seat portion described in (2) above.

(4) Further, generally, the reclining backrest is often formed as a separate body from the seat portion. Naturally, it requires materials and labor, and the overall cost is high. In addition, it is said that a cushioning material is put in the backrest and the seat portion to provide a cushioning effect and support for various body types. Had to increase the amount of cushion material and adopted a cushion structure having a complicated structure, which also led to an increase in cost. In other words, from the side that manufactures this type of vehicle seat, there is a demand for a structure that can be manufactured at a low cost with a relatively simple structure that can provide a sufficient cushioning effect for users of all physiques. .

Therefore, the inventors of the present invention have completed the present invention as a result of various studies on how to make a seat that can meet the above various requirements.

[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 improve the physical constitution of a user in a vehicle seat in which the backrest can be reclined. The 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, adjustments can be made accordingly, and even a person of a general physique can optimize his or her own. It is to provide a vehicle seat that can freely adjust its comfortable state with a simple structure.

[0012]

In order to solve the above-mentioned problems, first, the means adopted by the invention according to claim 1 will be described with reference to the reference numerals used in the embodiments. The seat 20 is supported by a support 10 fixed to the seat 20.
On the other hand, in the vehicle seat 100 in which the backrest 30 is reclined, the front ends of the left and right support arms 21 forming the seat portion 20 are provided on the front side of the support base 10.
The first free lock device 51 has one end connected to a rear support bar 22 extending substantially horizontally between the rear parts of the two support arms 21 and 21 while supporting the other end of the first free lock device 51 on the support base 10 side. The lower end of the frame 31 of the backrest 30 is rotatably connected to the rear end portion of each support arm 21 via a connecting shaft 32.
An auxiliary arm 33 whose tip extends downwardly below the connecting shaft 32 is integrally connected to the lower end of at least one side thereof, and one end of the restriction link 40 is connected to the lower end of the auxiliary arm 33.
The vehicle seat 100 "is characterized in that the other end of the regulation link 40 is rotatably connected to the support base 10 side.

That is, in the vehicle seat 100 according to the first aspect of the invention, the lower end of the frame 31 on the backrest 30 side is connected to the support arm 21 forming the seat portion 20, and both sides of the seat portion 20 are supported. The rear support rod 22 laid between the arms 21 in a substantially horizontal shape is connected to the support base 10 side through the first free lock device 51. The back support 30 reclines and the rear portion of the seat portion 20 is connected. It was designed to let you sink.

The vehicle seat 100 according to claim 1
Is provided with an auxiliary arm 33 on one side of a frame 31 that constitutes the backrest 30, the auxiliary arm 33 protruding below a rotation shaft 32 that connects the frame 31 and the support arm 21 on the seat portion 20 side. The auxiliary arm 33 is integrally provided, and the other end of a restriction link 40, one end of which is connected to the connection shaft 12 fixedly supported on the support base 10 side, is connected to the auxiliary arm 33. The rotation range of the auxiliary arm 33 on the 30 side is regulated. In this way, the rotation range of the lower end of the auxiliary arm 33 is set to the regulation link 40.
As a result, the reclining of the backrest 30 is made larger than the amount of depression of the rear portion of the seat portion 20 by restricting the backrest 30.

Similarly, the means adopted by the vehicle seat 100 according to the second aspect of the present invention is similar to the "support base 10 fixed on the floor of the vehicle.
In the vehicle seat 100, which is supported by the seat back 20 and reclines the backrest 30 with respect to the seat 20,
The front ends of the left and right support arms 21 and 21 forming 0 are tiltably supported by the front support rods 11 on the support base 10 side, and are formed separately from these support arms 21 and 21 to form front support rods. 11 to the seat portion 2 extending further forward than this
The seat arm 60 that constitutes the front part 20A of 0 is rotatably connected, and the other end of the second free lock device 52 is attached to the mounting part 61 integral with the seat arm 60. Vehicle seat 10 characterized by being connected to the side
It is 0 ".

That is, the vehicle seat 100 according to the second aspect of the present invention is configured such that the front portion 20A of the seat portion 20 is projected forward from the front surface of the support base 10. The second free lock device 52 can be freely changed. Therefore, 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 in front of the support base 10. Between the mounting portion 61 that is rotatably connected to the rod 11 and is integral with the seat arm 60, and the connecting member 23 that is integrated with the rear lower surface of the support arm 21 on the seat 20 side, The free lock device 52 is interposed.

The vehicle seat 100 according to claim 3 is the seat arm 6 of the vehicle seat 100 according to claim 2.
An adjusting member 70 is further rotatably connected to the tip of 0. The adjusting member 70 is supported by a frictional force in the connecting portion of the seat arm 60, and a user grips the seat member 20 from the surface of the seat member 20, which is the surface side, to rotate the seat member. The angle with respect to the seat arm 60 is adjusted.

And, in order to solve the above-mentioned problems,
The means adopted by the invention according to claim 4 will be described with reference to the reference numerals used in the embodiments. "The backrest 3 is supported by the support base 10 fixed on the floor of the vehicle and the seat 20.
In a vehicle seat 100 in which 0 is reclined, the entire cushion plate 80 integrally formed of a fiber-reinforced plastic in a substantially L-shaped cross section is housed in the backrest 30 and the seat portion 20, and the cushion is formed. Board 8
The front end of 0 is rotatably mounted on the front support bar 11 located in the upper front part of the support base 10, and the connecting rod 81 is integrated with the upper end of the rear part 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 present invention, the seat portion 20 and the backrest 30 have a substantially L-shaped cross section and are sufficient to receive the user's body and back. A cushion plate 80 made of fiber and having a large width is put therein, and the cushion plate 80 has sufficient rigidity and a certain degree of flexibility to support a person.
Therefore, the cushion plate 80 of the vehicle seat 100 is
With the reclining of the backrest 30, the entire body flexes and expands, and also deforms 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 sequentially described 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 of a vehicle seat 100 according to the present invention. The vehicle seat 100 is wrapped by one continuous cover material and is continuous with each other. The seat 20 and the backrest 30 support the base 10.
It is adapted to be supported above, and is manufactured by installing the continuous seat portion 20 and backrest 30 on the support base 10. Therefore, the seat 20 and the backrest 30
If the vehicle seat 10 and the vehicle seat 10 are separately formed and compared with a conventional one that is separately mounted on the support base 10, the vehicle seat 10
The manufacture of the whole 0 is easy.

In the vehicle seat 100,
The angle of the seat portion 20 and the backrest 30 is adjusted by a first free lock device 51 and a second free lock device 52 which will be described later. These first free lock device 51 and second free lock device are used. The device 52 includes a seat 20.
Since the side plate 91 is located below the base plate and is completely covered by the side plate 91 attached to the support base 10, something is not caught or caught during its operation. Safety is ensured for use by a specified number of people. An armrest 90 is provided above the side plate 91, and the first freelock device 51 or the second freelock 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 this vehicle seat 100, as shown in FIG. 1, the front portion 20A of the seat portion 20 is made to protrude more largely than the front surface of the support base 10.
As a result, a sufficient space for placing luggage or shoes under the front lower portion of the seat 20 or accommodating a foldable footrest (not shown) is ensured. Of course, the front portion 20A of the seat portion 20 is thus
The front part 2 by projecting the front part of the support base 10.
This allows the user's foot to be stored in the lower part of 0A, which can make the posture of a person with a long foot comfortable, for example.

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

As to the vehicle seat 100 according to claim 1, as shown in FIGS. 3 to 5, in the vehicle seat 100, the front ends of the left and right support arms 21, 21 constituting the seat portion 20 are provided on the support base 10 side. Of the first free lock device 51, which is tiltably supported by the front support bar 11 and is connected to the rear support bar 22 extending substantially horizontally between the rear parts of the support arms 21 and 21. The lower end of the frame 31 of the backrest 30 is rotatably connected to the rear end of each support arm 21 via the connecting shaft 32.
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 one end of a restriction 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, in this vehicle seat 100, when the backrest 30 is laid down from the position shown by the solid line in FIG. 3 to the position shown by the phantom line, the seat portion 20 has the front support rod 11.
In particular, the rear portion of the seat portion 20 sinks together with the lower end portion of the backrest 30 to the position shown by the phantom line in FIG. This makes the back 3
With the reclining of 0, the rear part of the seat part 20 becomes the front part 20.
Since the height 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 the front is not displaced.

Further, at the time of reclining the backrest 30, the bending center (hip point) of the human body,
The center of bending between the seat portion 20 and the backrest 30 does not change significantly by the action of the regulation link 40 described below. Therefore, when the backrest 30 is reclined, the lower surface of the body of the user is the seat portion. Since there is no large deviation from the surface formed by the backrest 30 and the backrest 30, the user can use the vehicle seat 1
There is no need to adjust the position of the body with respect 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. Is. First free lock device 51 and second free lock device 5 described later
In the reference numeral 2, a fluid of a predetermined pressure is sealed in the cylinder, and the piston is moved with respect to the cylinder by the flow of the pressure fluid or the force from the backrest 30. Normally, it is stopped so as to be in a locked state (a fixed state in which it does not expand or contract), and the flow of the pressure fluid is allowed by the operation of the operation button 92 so that it can be expanded or 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 up, and if the lock is released by operating the operation button 92, This 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 lobbies are made.

Now, the lock state of the first free lock device 51 as described above is released by the operation button 92,
When the user applies force to the backrest 30 and pushes it, 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 in FIG. 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 lower due to 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 connecting member 23 thereof, the first free lock device 51 contracts. As a result, the backrest 30 is reclined to the position shown by the phantom line in FIG.

What is important at the time of reclining the backrest 30 is that the rotation of the lower end of the backrest 30 is regulated by the regulation link 40, so that the person can be reclined according to the hip point of any person. That is. That is, by restricting the rotation of the backrest 30 by the restriction link 40, as a result, the tilting of the backrest 30 causes the seat portion 2
It is made at a larger angle than that of 0, and the reclining of the backrest 30 is made to suit the physique of all people.

The reason is as follows. First, back 3
As shown in FIG. 4, since the frame 31 of 0 is connected to the upper end of the rear portion of each support arm 21 on the seat portion 20 side through the pivot shaft 32, the angle of the frame 31 relative to the support arm 21 is freely set. 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 connecting shaft 12, and the multi-ends of the restriction link 40 are projected below the rotation shaft 32 of the frame 31 on the backrest 30 side. It is 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 restriction link 40 is rotated from the position shown by the solid line in FIG. 4 to the position shown by the phantom line, the restriction link 40 will move.
Since it is connected to the support base 10 side by the backrest 30,
When the auxiliary arm 33 on the side is retracted to the front side of the vehicle seat 100, the backrest 30 is more largely tilted backward.

Therefore, the vehicle seat 1 according to claim 1
According to 00, when the backrest 30 is reclined, the rear portion of the seat portion 20 sinks, and the backrest 30 reclines at an angle larger than the sinking amount of the seat portion 20. Even if the user has a different physique,
When the reclining is completed, the entire body can be reliably received by the seat 20 and the backrest 30. Moreover, since the reclining amount of the backrest 30 is larger than the receding of the seat portion 20, there is almost no difference between the hip point of the user and the center of rotation of the backrest 30, so the user shifts his body. The reclining of the back 30 can be performed without any need.

As to the vehicle seat 100 according to claim 2, the vehicle seat 100, as shown in FIGS. 6 to 9, particularly supports the front ends of the left and right support arms 21 and 21 constituting the seat portion 20. It is tiltably supported by the front support bar 11 on the side of the platform 10 and is formed separately from both support arms 21 and 21 and extends forward from the front support bar 11 to the front of the seat portion 20. The seat arm 60 that constitutes the portion 20A is rotatably connected, and the other end of the second free lock device 52 is connected to the mounting portion 61 that is integral with the seat arm 60 on the rear lower surface side of the support arm 21. It was done.

In other words, the vehicle seat 100 includes the seat portion 2
The front portion 20A of 0 can be freely undulated within a certain range, and its movement will be described with reference to FIG. In a normal state where the backrest 30 is not reclined, the front portion 20A of the seat portion 20 is located at the position shown by the solid line in FIG. 9, but a user who feels that the height of 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 imaginary line shown on the lower side in the figure. Also, when the backrest 30 is maximally reclined, the front portion 20A
Will rise 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 above-described operation button 92 on the first free lock device 51 side. The operation of 52 can be easily performed by the user.

The reason why the front portion 20A can be raised and lowered as described above is that the seat arm 60 is housed in the front portion 20A, and the seat arm 60 is mounted on the front support rod 1 on the support base 10 side.
This is because it is rotatably supported 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 arranged in the lower portion of the seat 20 is connected to the support arm 21 that constitutes the seat 20. This is because the other end of the second free lock device 52 is connected to the seat arm 60 side while the second free lock device 52 is connected to the seat arm 60. Of course, a support plate (not shown) is laid between the two seat arm 60 in a substantially horizontal shape, and the support plate supports the weight received by the front portion 20A and the like.

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 physique of the user. It has excellent versatility that anyone can do.

-Vehicle seat 100 according to claim 3 In this vehicle seat 100, a metal plate, for example, is provided at the tip of each seat arm 60 that constitutes the vehicle seat 100 according to claim 2. The adjustment member 70 formed by folding the two is provided. The adjustment member 70 is so-called friction bonded to the tip of each seat arm 60. In other words, the adjusting member 70 is held by a constant 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 increased. Can be changed freely. Of course, this adjusting member 70 is
Further, it is housed in the front end portion 20a of the front portion 20A (for example, it is completely covered by the cushion material and the covering material of the seat portion 20).

By applying a force to the adjusting member 70 from the outside of the cover 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 portion 2 of the seat 20 is attached to the lower surface of the user's leg.
0A comes into contact with the front portion 20A, but if the front end portion 20a of the front portion 20A further protrudes upward or forward, it will give a user discomfort. Therefore, the position of the front end portion 20a can be freely set. The vehicle seat 100 according to claim 3 can be changed to.

Therefore, also in this vehicle seat 100, the shape of the front end portion 20a of the seat portion 20 can be freely changed according to the physical constitution of the user, and it is easy for anyone to use the seat comfortably. It has excellent versatility that can be used 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 portion 20A of the seat portion 20, the front portion 20A.
Since the tip portion 20a can be changed further,
The shape of the seat portion 20 can be freely changed as a whole, so that people of all physiques can comfortably sit.

About Vehicle Seat 100 According to Claim 4 In this vehicle seat 100, as shown in FIG. 11, in particular, a cushion plate 80 integrally formed of fiber-reinforced plastic in a substantially L-shaped cross section is used. The whole is housed in the backrest 30 and the seat 20, and the cushion plate 8
The front end of 0 is rotatably mounted on the front support bar 11 located in the upper front part of the support base 10, and the connecting rod 81 is integrated with the upper end of the rear part of the cushion plate 80 so as to be substantially horizontal,
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. With the cushion plate 80, the cushioning property and the easiness of manufacturing of the vehicle seat 100 as a whole are sufficient. It is secured.

That is, in this vehicle seat 100, the portion where the cushion plate 80 enters the seat portion 20 and the backrest 30 is integrally molded of fiber reinforced synthetic resin. The flexibility of 80 itself can be fully utilized, and thereby, the seat portion 20 and the backrest 30 can be configured to be integral in appearance.

Of course, the cushion plate 80 itself is
The vehicle seat 1 can be deformed to fit the physique of a person seated in the vehicle seat 100, and has sufficient rigidity to support the weight of the user.
The amount of other cushioning material in 00 can be reduced.
Particularly, the upper end of the cushion plate 80 can freely move within the range of the long hole 34a with respect to the guide plate 34 provided on the backrest 30 side, and how the backrest 30 is reclining. Cushion plate 80
The transformation of is made freely, and users of all physiques will have a comfortable posture.

EXAMPLE Next, a vehicle seat 100 according to each claim is
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 the inventions of the claims, the structure of each part of the vehicle seat 100 will be described to replace 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 the support base 10 is arranged and fixed on the floor surface of the vehicle.
A seat portion 20 and a backrest 30 assembled on the support base 10, a side plate 91 for covering the lower portion of the backrest 30 and the sides of the seat portion 20, and an armrest 90 provided on the side plate 91. Is what you are doing.

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

The rear side pillars constituting the support base 10 are lower than those on the front side, but as shown in FIG. 1 or 3, this is the rear portion of the seat portion 20. This is to ensure a space in which the lower end of the backrest 30 can freely sink. Further, a pillar for the armrest 90 and the side plate 91 itself are connected to the pillars on the rear side. Of course, each pillar is integrated by a horizontal beam or the like, and the front end side of the first free lock device 51 is connected to the support base 10 by utilizing this horizontal beam as shown in FIG.

The seat portion 20 is, as shown in FIGS.
It has a pair of substantially L-shaped left and right support arms 21 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. It is to be attached to. On the other hand, each support arm 2
As shown in FIG. 4, the rear of 1 has a portion that rises upward, and this portion includes the frame 3 on the backrest 30 side.
1 is rotatably connected via a rotation shaft 32. As shown in FIG. 5, each of the support arms 21 is integrated by a rear support rod 22 arranged on the rear side of the support arm 21. One end of a first free lock device 51 described later is connected to the member 23.

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

Further, the seat portion 20 according to this embodiment is shown in FIG.
Alternatively, as shown in FIG. 10, it has a front portion 20A protruding from the front surface of the support base 10, and this front portion 20A further has a tip portion 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 a support plate, a cushion material, etc. around the frame 31 and mounting the backrest 30. In this embodiment, the backrest 30 rises above the cushion plate 80. It is configured by arranging the parts inside. In other words, this back 30
Is continuous with the seat portion 20 through the cushion plate 80, and one common material is used as the covering material for 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 hence the vehicle seat 100 itself, becomes easier. -ing

The lower end of the frame 31 of the backrest 30 is, as shown in FIG. 4, the support arm 2 on the side of the seat 20 described above.
1 is rotatably connected via a rotary shaft 32. Further, as shown in FIG. 5, an auxiliary arm 33 protruding downward from the above-mentioned rotation shaft 32 is integrated with the lower end of one side of the frame 31.
The lower end of 3 is rotatably connected to the regulation link 40.
As a result, the frame 31 of the backrest 30 is rotatably connected to the support arm 21 on the seat 20 side by the rotation shaft 32, but the auxiliary arm 33 on the frame 31 side is connected to the regulation link 40. Because it is connected, the regulation link 4
The support arm 21 on the side of the seat 20 while being regulated by 0
It will rotate with respect to.

As shown in FIG. 4, the regulation link 40 is such that its upper end is rotatably coupled to the coupling shaft 12 fixedly attached to the support base 10 side.
In the case of the two-seater vehicle seat 100 shown in FIG. 5, 0 is arranged between the two seat portions 20. And, the connecting shaft 12 for connecting these restriction links 40,
As shown in FIG. 5, each backrest 3 is placed at the center of the vehicle seat 100.
0 means that it is attached in a substantially horizontal position at a location where it does not interfere.

On the other hand, on both upper sides of each backrest 30, as shown in FIG.
As shown in FIG. 1, a guide plate 34 having a vertically elongated hole 34a is fixedly arranged, and the guide plate 34 is horizontally arranged at the upper end portion of the cushion plate 80 in the elongated hole 34a of each of the guide plates 34. The both ends of the connecting rod 81, which are integrally formed in a shape, are engaged with each other.

As shown in FIGS. 3 to 5, the first free lock device 51 for controlling the movements of the seat portion 20 and the backrest 30 has one end located substantially in the center of the rear support rod 22 on the seat portion 20 side. The first free lock device 51 is rotatably connected to the fixed connecting member 23.
It is connected to the side. The first free lock device 51, like the second free lock device 52 described later,
The piston rod is expanded and contracted by the pressure fluid sealed in the cylinder, and the flow of the pressure fluid in the cylinder is normally stopped (locked state) to allow the flow of this pressure fluid. 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 the operation button 92 provided inside the armrest 90. The above also applies to the second free lock device 52 for rotating the seat arm 60 described below.

The seat arm 60 includes a front portion 20A of the seat 20.
It has a size (length) that can be accommodated in the lower part of the table, and its rear end is rotatably connected to the front support rod 11 on the support base 10 side, as shown in FIGS. 6 and 7. It was done. Further, as shown in FIG. 7, the seat arm 60 is integrally provided with a mounting portion 61, and the mounting portion 61 has the second free lock device 52 described above.
The front end of is connected. This second free lock device 52
Is disposed on one side below the seat portion 20 as shown in FIGS. 7 and 8, and its rear end is, for example, the seat portion 2
It is connected to the rear lower surface side of the 0-side support arm 21. In other words, the second free lock device 52 includes the seat portion 2
It moves similarly to the 0-side support arm 21, and normally, 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, and the state shown by the phantom line in FIG. 9 is obtained.

Even in the front portion 20A of the seat portion 20,
Since it is necessary to support the weight of the user, it is possible to secure the rigidity at the bottom of the front portion 20A by straddling the support plate between the seat arm 60.

As shown in FIGS. 7 and 8, the lower end of the adjusting member 70 is frictionally connected to the tip of each seat arm 60 as described above. The adjusting member 70 is provided at the front end portion 20A of the seat portion 20 and further at the front end portion 20.
It is to be housed in a and stands up from the tip of each seat arm 60 toward the upper front part. Friction coupling means that if you do not apply any force,
Although it maintains the combined state by frictional force,
It refers to a connection that allows rotation when a force greater than frictional force is applied.

As shown in FIG. 8, the adjusting member 70 in the present embodiment has such a size as to cover substantially the entire front surface of the tip portion 20a of the seat portion 20. The user can freely change the position as shown in FIG. 10 by grasping and applying force to it.

FIG. 11 shows a side surface of a cushion plate 80 to be housed in the seat portion 20 and the backrest 30 which constitute the vehicle seat 100, and the cushion plate 80 has a cross section of substantially L. It has a letter shape. In the present embodiment, the cushion plate 80 is integrally formed by impregnating carbon fiber with a thermosetting resin and curing the resin, and has a predetermined cushioning property and rigidity. Is.

The cushion plate 80 has a front end formed in a semicircular shape that is convex upward, and by engaging the front end with the front support rod 11 constituting the support base 10, It is locked to the support base 10. Also,
A horizontal connecting rod 81 is integrated with the upper end of the rising portion of the cushion plate 80.
Both ends of the connecting rod 81 are accommodated in the elongated holes 34a of the guide plate 34 on the backrest 30 side so as to be vertically movable, so that even if the cushion plate 80 is bent, It is firmly supported on this side.

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

In the vehicle seat 100 of this embodiment, the support base 10 assembled in the factory is fixed on the floor surface of the vehicle, and the support base 10 is assembled in the same manner in the factory. Seat 20 and backrest 3
0 is connected via each first free lock device 51 and second free lock device 52. Further, by arranging the side plate 91 to which the front support rod 11 is attached on the side of the seat 20 and the backrest 30 that have been connected to the support base 10, and fixing the side plate 91 to the support base 10 side, The vehicle seat 100 is completed. In other words, the vehicle seat 100 is roughly divided into three parts at a factory or the like, and is brought into a vehicle to be assembled. Therefore, the vehicle seat 100 can be manufactured, transported and installed relatively easily.

[0062]

As described above in detail, in the invention according to claim 1, as illustrated in the above-mentioned embodiment, "the supporting portion 10 fixed to the floor of the vehicle is supported and the seat portion 20 is In the vehicle seat 100 in which the backrest 30 is reclined, the front ends of the left and right support arms 21 forming the seat portion 20 are tiltably supported by the front support bar 11 on the support base 10 side, and Both support arms 21
・ A rear support bar 22 which is laid across the rear part of the 21 in a substantially horizontal manner.
The other end of the first free lock device 51 having one end connected to is connected to the support base 10 side, and the lower end of the frame 31 of the backrest 30 is rotated to the rear end of each support arm 21 via the connection shaft 32. Auxiliary arm 33 is integrally connected to a lower end of at least one side of the backrest frame 31 and is integrally connected to the lower end of the backrest frame 31, and the lower end of the auxiliary arm 33 has a restriction link 40. The 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 so that a person having a general physique can freely adjust his or her optimum 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 depressed, so that not only can the user's weight be reliably supported, but also the user at the time of the tip portion 20a. It is possible to prevent the body from shifting to the front, which makes it very comfortable. Moreover, the fact that the rear part of the seat part 20 sinks in accordance with the reclining of the backrest 30 means that it can be used by users of all physiques, and the seat 100 for vehicles can be formed according to a certain standard. Also, it can be made highly versatile.

Further, the vehicle seat 10 according to claim 1
According to 0, since the backrest 30 can be reclined at an inclination angle larger than the sinking amount of the seat portion 20, there is no change in the hip point of the user due to the reclining, and the user can use it after reclining. It is possible to completely eliminate the inconvenience that the person has to correct the physical displacement.

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

According to the second aspect of the invention, "in the vehicle seat 100, which is supported by the support base 10 fixed on the floor of the vehicle so that the backrest 30 reclines with respect to the seat portion 20, The front ends of the left and right support arms 21 and 21 forming the seat portion 20 are tiltably supported by the front support bar 11 on the support base 10 side, and both support arms 21 are supported.
The seat arm 60, which is formed separately from 21 and extends forward of the front support bar 11 and constitutes the front part 20A of the seat 20, is rotatably connected to the seat bar. Arm 6
The other end of the second free lock device 52 is connected to the mounting portion 61 integrated with 0 to the rear lower surface side of the support arm 21. ”Therefore, the physique differs from a general person. It is possible to provide a vehicle seat with a simple structure in which a person having a general physique can freely adjust his or her optimum comfortable state.

In particular, the vehicle seat 10 according to claim 2
According to No. 0, even if the front portion 20A of the seat 20 is made to protrude more largely than the front surface of the support 10 in order to secure the space in front of the support 10, the front portion 20A is the seat portion housed inside. The arm 60 is rotated by the second free lock device 52. Therefore, even if the backrest 30 is largely reclined and the front portion 20A of the seat portion 20 protrudes to the upper front side, the arm 60 is lowered downward. Can be done. That is, the vehicle seat 100 in which the position of the front portion 20A can be adjusted can be suitable for users of all the seat portions 20.

In the invention according to claim 3, the seat arm 60 of the vehicle seat 100 according to claim 2 is further housed in the front end 20a of the front part 20A of the seat 20. It is characterized in that the adjusting member 70 is configured by friction coupling, and by doing so, even if the physique is different from that of a general person, adjustment can be performed accordingly, and even a person of a general physique It is possible to provide a vehicle seat that can freely adjust the optimum comfort state with a simple structure.

That is, the tip portion 20a, which is located further on the tip portion of the front portion 20A of the seat portion 20, comes into contact with the lower surface of the user's leg when the backrest 30 is placed at the tip portion 20a. The height of the tip portion 20a can be reduced by the above-described configuration, and the user's discomfort can be eliminated. The adjustment of the tip portion 20a may be performed according to the physique of the user,
The vehicle seat 100 can be easily used by all people.

Further, in the invention according to claim 4,
"In a vehicle seat 100 supported by a support base 10 fixed on the floor of a vehicle so as to recline the backrest 30 with respect to the seat portion 20, the vehicle seat 100 is integrally formed of a fiber-reinforced plastic into a substantially L-shaped cross section. Molded cushion plate 80
The entire body is housed in the backrest 30 and the seat portion 20, and the front end of the cushion plate 80 is rotatably mounted on the front support bar 11 located in the upper front part of the support base 10 to form a cushion. A connecting rod 81 is integrated with the upper end of the rear part 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. " The feature of this is that even if the physique is different from that of a general person, adjustments can be made accordingly, and even a person of a general physique can freely adjust his or her optimal comfort state. The possible vehicle seat can be provided with a simple structure.

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

Further, in the vehicle seat 100 according to the present invention, the cushion plate 80 itself has both the cushioning property and the rigidity necessary for the seat, so that the seat portion 20 and the backrest 30 are formed. Not only can the amount of cushioning material for this purpose be reduced, but the cushioning plate 80 itself can be freely sandwiched to make it suitable for users of all physiques.

[Brief description of 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 a state in which a side plate 91 is removed for explaining the vehicle seat according to claim 1 in particular.

FIG. 4 is an enlarged view of a main part of the passenger seat, and is a partial side view taken along line 1-1 of 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 and showing its configuration in an extracted manner.

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

8 is a front view of what is shown in FIG. 7. FIG.

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

FIG. 10 is a partial side view centering on the front end portion for showing the operation of the adjusting member.

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

[Explanation of symbols]

 100 Vehicle Seat 10 Supporting Stand 11 Front Support Rod 12 Connecting Shaft 20 Seat 20A Front 20a Tip 21 Support Arm 22 Rear Support Rod 23 Connecting 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 Mounting part 70 Adjusting member 80 Cushion plate 81 Connecting rod 90 Arm rest 91 Side plate 92 Operation button

Claims (4)

[Claims] 1. A vehicle seat, which is supported by a support base fixed on the floor of a vehicle and reclines a backrest with respect to a seat portion, wherein front ends of left and right support arms constituting the seat portion are provided. The other end of the first free lock device is supported so as to be tiltable on the front support bar on the side of the support base, and the other end of the first free lock device is connected to the rear support bar, which is bridged in a substantially horizontal manner between the rear parts of both support arms. The backrest frame is rotatably coupled to a rear end portion of each of the support arms via a coupling shaft, and the tip is provided on at least one side lower end of the backrest frame. An auxiliary arm extending below the connecting shaft is integrally connected, one end of the restriction link is connected to the lower end of the auxiliary arm, and the other end of the restriction link is rotatably connected to the support base side. Vehicle characterized by Seat for. 2. A vehicle seat, which is supported by a support base fixed on the floor of a vehicle and reclines a backrest with respect to a seat portion, wherein front ends of left and right support arms constituting the seat portion are provided. It is tiltably supported by the front support rod on the side of the support base and is formed separately from both of these support arms, and extends forward from the front support rod to form the front portion of the seat portion. A seat arm for rotation is rotatably connected, and the other end of the second free lock device is connected to a lower surface side of the rear portion of the support arm at an attachment portion integrated with the seat arm. seat. 3. An adjusting member is provided, the lower end of which is rotatably connected to the front end of the seat arm, and the upper end of which protrudes toward the upper front part of the seat arm to adjust the height of the tip of the seat arm. 3. The vehicle seat according to claim 2, wherein the entire adjustment member is housed in the tip portion of the seat portion. 4. A vehicle seat, which is supported by a support base fixed on the floor of a vehicle and has a backrest reclining with respect to a seat portion, which is integrally made of a fiber-reinforced plastic in a substantially L-shaped cross section. The entire 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 an upper front portion of the support base. For a vehicle characterized in that a connecting rod is integrated with 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.