JPH059868Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention can improve sitting comfort by adjusting the seat surface shape of the seat back and seat cushion depending on the sitting posture of the occupant. The present invention relates to an improvement of a vehicle seat.

[Conventional technology]

In general, vehicle seats are desired to stably hold occupants while the vehicle is running, provide appropriate sitting comfort, and reduce fatigue as much as possible even when seated for long periods of time. It is also desirable for this type of vehicle seat to have a structure in which the cushioning properties, hold properties, etc. can be changed as appropriate depending on the body shape and preferences of the occupant, as well as the sitting posture. In order to satisfy these demands, seat cushions and the like have traditionally been configured to be slidable in the front and rear directions of the seat, and seat backs have been configured to be tiltable.
Furthermore, seats in which various support devices and the like are attached to various parts of the seat are also known.

By the way, in this type of vehicle seat, the seat back may be tilted backwards to a certain extent so that the seated person is seated in a relaxed posture.
In this case, conventional seat structures have had some problems in stably supporting the seated person.

In other words, when the occupant is seated on a vehicle seat, the weight of the occupant is mainly supported by the rear end of the seat cushion, but is also supported by the contact surface with the lower edge of the seat back, ensuring a stable seating posture. It is possible. However, if the angle of the seat back with respect to the seat cushion increases, the seated person will be in a supine position, and their lumbar region will tend to move toward the front of the seat cushion. The support force for the lumbar region becomes weak, especially when sitting in a position where the lumbar region is forward, a gap is created between the back of the seated person's lumbar region at the intersection of the seat cushion and the seat back, making it difficult to maintain a stable relaxed posture. This was something that would become difficult.

For this reason, the seat bag was
As shown in the above-mentioned publications, there is a known sheet having a center-folding structure, which is divided into two parts, an upper part and a lower part, and these upper and lower sheet parts are connected and supported in a bendable state through a hinge part. This was effective to some extent in eliminating the gap on the back side of the lumbar region of the seated person when sitting in a relaxed posture and ensuring a stable support state.

[The problem that the idea attempts to solve]

However, with the above-mentioned conventional structure, when an occupant sits with his/her center of gravity shifted toward the front part of the seat cushion, even if the seat back is folded down, it is unavoidable that a gap will be created above the rear end of the seat cushion on the back side of the occupant's waist (see Figure 5), resulting in an unsatisfactory sitting position as the occupant is unable to obtain stable support, even if the seat back is folded down.

The present invention was devised in view of these circumstances, and provides a vehicle that can easily and appropriately maintain a stable holding state when the occupant is seated in a relaxed posture, and that improves the feeling of sitting comfort. The purpose is to obtain a sheet for use.

[Means to solve the problem]

In order to meet such demands, the vehicle seat according to the present invention has a lower component of the seat bag connected to the lower end side of the seat bag main body in a rotatable state by a hinge part, and a seat bag in a similar manner. The rear structure of the seat cushion is also connected to the rear end side of the seat cushion body in a rotatable state by a hinge part, and the lower end of the seat back lower structure and the rear end of the seat cushion rear structure The two are connected in a relatively rotatable manner.

[Effect]

According to the present invention, by appropriately rotating and displacing the seat back lower structure and the seat cushion rear structure from the respective main body sides, the shape of the seat surface can be rotationally adjusted according to the relaxed sitting posture of the seated person. , it is possible to easily and appropriately ensure a stable seating state and improve the feeling of sitting comfort.

〔Example〕

Figures 1 to 4 show an embodiment of the vehicle seat according to the present invention.
As is clear from FIGS. 1 and 4, it is composed of a seat cushion 2, a seat back 3, etc., which are erected on the rear end side. In this embodiment, a case will be described in which the seat cushion 2 and the seat bag 3 are provided in a rear seat in which the main body portions are fixedly attached to a vehicle body (not shown).

Now, according to the present invention, in the vehicle seat 1 having such a configuration, the seat back lower structure 3a is divided from the seat back main body 3 side in a rotatable state by the hinge part 10, and is connected to the lower end side. Similarly, the seat cushion rear structure 2a is divided from the seat cushion main body 2 side in a rotatable state by a hinge part 11, and is connected to the rear end side. It is characterized in that the lower end side of the lower structure 3a and the rear end side of the seat cushion rear structure 2a are connected in a relatively rotatable state.

Here, in FIG. 2, 12 is a seat frame that constitutes the seat cushion body 2, and 13 is a seat frame that constitutes the seat back body 3. A seat spring, etc. is attached to this seat frame, and an arrow mark in the figure is attached to the vehicle body side (not shown). It is fixed with screws, etc. as shown. Reference numerals 14 and 15 designate subframes constituting the seat cushion rear structure 2a and the seat back lower structure 3a, each of which includes a hinge portion 11, which is provided with an appropriate friction lock mechanism, etc.
It is rotatably supported by the seat frames 12 and 13 via the seat frame 10. Further, these sub-frames 14 and 15 are configured such that their connecting pieces are rotatably connected to each other by a pivot pin 16 and rotate in conjunction with each other.

In addition, 20 is an operation means for rotationally adjusting the seat cushion rear structure 2a and the seat back lower structure 3a according to the seating posture.
As shown in FIG. 3, the lock plate 21 having a locking tooth portion 21a provided on the rear end shaft 12a of the seat frame 12, which constitutes a part of the seat cushion body 2, is selectively engaged with the lock plate 21. A case is shown in which the lock lever 22 has a toothed portion 22a that rotates, and an operation lever 23 for selectively manually rotating the lock lever 22. Although a detailed explanation thereof is omitted, its operation is easily understood. Good morning.

According to such a configuration, it can normally function as a general vehicle seat 1 in the state shown in FIG. 1, and when necessary, the seat back lower structure 3a and the seat cushion rear structure By rotating and displacing the seats 2a from the respective main bodies 3 and 2 as appropriate, as is clear from FIG. It is possible to easily and appropriately ensure a stable sitting state and improve the feeling of sitting comfort. In particular, in this case, the gap B between the rear side of the seat cushion and the rear end of the seat cushion on the back side of the lumbar area of seated person A, as in the conventional example shown in Fig. It is possible to hold the chair firmly and stably, and it is possible to obtain a comfortable sitting feeling.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape and structure of each part may be modified and changed as necessary. For example, the seat cushion rear structure 2a that characterizes the present invention
Appropriate modifications may be made to the specific structure of the seat back lower structure 3a, the state of its connection to the main bodies 2 and 3, and the like. Further, in the above-described embodiment, the main body portions of the seat cushion 2 and the seat back 3 are fixed to the vehicle body side, but the present invention is not limited to this, and both or one of them may be fixed to the vehicle body side using an appropriate slide mechanism. The seat cushion rear structure 2a or the seat back lower structure 3a may be provided on the vehicle body side in a slide-adjustable state via a slider, etc. In such a case, the seat cushion rear structure 2a or the seat back lower structure 3a is The sides may be moved forward and backward or up and down the vehicle body.

Further, the above-described seat structure can be effectively applied to a vehicle seat, particularly a relaxation seat used on the rear side, but it is needless to say that the present invention is not limited thereto.

[Effect of idea]

As explained above, according to the vehicle seat according to the present invention, the seat back lower structure is divided from the seat back main body side in a rotatable state by the hinge portion, and is connected to the lower end side thereof, and Similarly, the seat cushion rear structure is configured to be divided from the seat cushion main body side in a state where it can be rotated by a hinge portion, and is connected to the rear end side, and the lower end side of the seat back lower structure and the seat cushion are connected to each other. Since the rear end sides of the seat cushion rear structure are connected in a relatively rotatable state, the seat back lower structure and the seat cushion rear structure can be connected in a simple and inexpensive manner.
By appropriately rotating and displacing each seat from the main body side, the shape of the seat surface can be movably adjusted according to the relaxed sitting posture of the occupant, ensuring a stable seating condition easily and appropriately, and improving the feeling of sitting comfort. It has various excellent practical effects.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing one embodiment of a vehicle seat according to the present invention, FIG. 2 is a schematic exploded perspective view showing its frame structure, FIG. 3 is a schematic diagram illustrating the operating means, and FIG. The figure is a schematic side view showing a seated state in a relaxed posture, and FIG. 5 is a schematic diagram showing a conventional example. In the figure, 1... Vehicle seat, 2... Seat cushion main body, 2a... Seat cushion rear structure, 3... Seat back main body, 3a... Seat back lower structure, 10, 11... Hinge part, 1
2, 13... Seat frame, 14, 15... Sub frame, 16... Pivot pin, 20... Operation means.

Claims (1)

[Scope of utility model registration request] The lower structure of the seat bag is connected to the lower end side of the seat bag body in a state where it can be rotated by a hinge part, and the rear part structure of the seat cushion is connected to the bottom end side of the seat bag body in a state where it can be rotated by a hinge part. 1. A vehicle seat, characterized in that the seat is connected to the rear end side, and the lower end of the seat back lower structure and the rear end of the seat cushion rear structure are connected in a relatively rotatable state.