JPH0345633Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention provides a seat back structure that provides a good seating feeling and proper sitting posture by appropriately and reliably supporting the spine of the seated person. Regarding.

[Conventional technology]

For example, in a vehicle seat, the seat back, which is tiltably supported via a reclining mechanism at the rear of the seat cushion, is important for stably holding the back of the seated person while the vehicle is in motion. Many structures having various structures have been proposed. Furthermore, the seat back of this type of vehicle seat is provided with a lumbar support, etc. that supports the lower back of the seated person, giving the seated person an appropriate feeling of sitting comfort and making it possible to remain seated for long periods of time. Some devices are also known to have a structure that can reduce fatigue as much as possible.

[Problems to be solved by the invention] By the way, conventional seat backs for vehicle seats and the like mentioned above not only have a large number of component parts and a complicated structure, but also have difficulty in providing an appropriate sitting position for the occupant. It cannot be said that a comfortable feeling and a stable holding state can be obtained, and it is desired that some kind of countermeasure be taken. In other words, in the conventional seat back structure, by tensioning an S-shaped spring within the frame-shaped seat back frame,
Although the structure is designed to elastically support the back of the seated person, on the other hand, the backbone of the seated person, which requires a moderate feeling of back support, may sink due to unnecessarily elastic deformation at the center of the spring. As a result, a stable holding state cannot be obtained, which not only impairs the feeling of sitting comfort but also causes problems such as poor sitting posture. Such a problem is unavoidable even in a seat provided with a lumbar support at the bottom of the seat back.

The present invention was developed in view of these circumstances, and it is possible to improve the feeling of sitting comfort by providing an appropriate and reliable feeling of back contact, especially to the spine of the seated person, and to promote proper sitting posture. The purpose is to obtain a seat back structure that can be obtained.

[Means for solving problems]

In order to meet such demands, the seat back structure according to the present invention has a longitudinal groove recessed in the center of the back surface of the seat back panel constituting the back surface of the seat back, and a rearward U-shaped cross section in this longitudinal groove. The seat back frame is mounted and fixed at a predetermined height position, and the lower end of the seat back frame is rotatably connected and supported to the seat cushion frame via a reclining device.

[Effect]

According to the present invention, by appropriately and reliably supporting the seated person's spine with the seat back frame embedded in the back side of the seat back panel, it is possible to obtain a sitting feeling with just the right amount of back support, thereby improving the feeling of sitting comfort. This can improve the sitting posture and make the sitting posture appropriate.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

1 to 3 show an embodiment of the seat back structure according to the present invention, and in these figures, the vehicle seat designated as a whole by reference numeral 1 has a seat cushion as shown in FIG. 2 and a seat back 4 tiltably supported via a reclining mechanism 3 on the rear end side.

Now, according to the present invention, in the vehicle seat 1 described above, as is clear from FIGS. 1 and 2, a vertical groove 11 is recessed in the center of the back surface of the seat back panel 10 constituting the back surface of the seat back 4. At the same time, a seatback frame 12 having a rearward U-shaped cross section is mounted and fixed in the vertical groove 11 at a predetermined height position, and the lower end of the seatback frame 12 is connected to the seatback frame 12 through reclining devices 13, 13. Seat cushion frame 1
It is characterized by being rotatably connected and supported on the 4th side.

To explain this in detail, the seat back 4 includes a seat back panel 10, a pad material 15 attached to the front side thereof, a seat back frame 12 that supports these, and a skin material (not shown) that covers the surface of the seat back panel 10. However, according to the present invention, the above-mentioned seat back frame 12 is formed as an elongated member having a substantially U-shaped cross section, and this is formed as a vertical member recessed in the seat back panel 10. By being accommodated and buried in the groove 11, the back support plate 12a of the seatback frame 12 faces the backbone of the seated person, making the back contact of that part moderately hard and providing an appropriate seating feeling. It was designed so that By thus appropriately and reliably supporting the backbone of the seated person with the back support plate 12a of the seat back frame 12,
It is possible to obtain a sitting feeling with a moderate amount of back support, improve the feeling of sitting comfort, and achieve effects such as making it possible to maintain a proper sitting posture.

In particular, such effects can be made even more appropriate by using in combination a lumbar support (not shown) attached to this type of vehicle seat 1.

In the seat back structure having the above-described configuration, the seat back frame 12 may be formed into a substantially S-shape along the longitudinal direction, for example, to match the shape of the seated person's spine.
It is easily understood that by doing this, the seated person can obtain a more comfortable backrest feeling, which can be effective in making the sitting posture more appropriate. Good morning.

Further, according to this embodiment, as shown in FIG.
12b is installed and fixed in the vertical groove 11 of the seat back panel 10 with screws, etc.
Furthermore, in this case, each screw fixing portion is configured with a plurality of holes 16 and 17. With such a configuration, when attaching the seat back 4 to the seat cushion 2 during assembly, any position can be appropriately selected from the plurality of vertical height positions, for example. This has great advantages in dealing with the physique, preferences, etc. of the seated person.

Furthermore, in the seat back structure according to the present invention,
As shown in FIGS. 2 and 3, the lower ends of both side plates 12b and 12b of the seat back frame 12 are
It is connected to the bases 20, 20 via the reclining devices 13, 13 that constitute the reclining mechanism 3, and the bases 20, 20 are connected and fixed to the U-shaped portion 21 formed at the center of the back side of the seat cushion frame 14. I try to do that.

Here, the above-mentioned reclining device 1
3 and 13, it is best to use ones with a conventionally well-known configuration, and the point is to use base 2.
It is only necessary that the seatback frame side plates 12b, 12b, which serve as arms relative to 0 and 20, have a structure that is rotatably adjustable and lockable at a desired position. In this case, the device may be operated using an operating knob (both not shown) provided on a shaft that penetrates the seat back 4 and projects on both sides. Further, a motor may be disposed in the center of the reclining devices 13, 13 between the above-mentioned seat back frame side plates 12b, 12b to form an automatically adjustable reclining mechanism. Its frame structure can be simplified compared to that of the previous model, and its practical advantages are great.

It should be noted that the present invention is not limited to the structure of the embodiment described above, and the structure, shape, etc. of each part can be changed and modified as appropriate, and various modifications can be considered.

Furthermore, although the seat bag structure according to the present invention can be applied to a vehicle seat to great effect, it is of course not limited thereto.

[Effect of idea]

As explained above, according to the seat back structure according to the present invention, a longitudinal groove is recessed in the center of the back surface of the seat back panel constituting the back surface of the seat back, and the seat has a rearward U-shaped cross section in the longitudinal groove. The back frame is mounted and fixed at a predetermined height position, and the lower end of the seat back frame is rotatably connected and supported to the seat cushion frame via a reclining device, resulting in a simple and inexpensive configuration. Nevertheless,
By properly and reliably supporting the seat back frame embedded in the back side of the seat back panel, the back of the seated person can be properly and securely supported, improving the feeling of sitting comfort. It has various excellent practical effects, such as being able to maintain a proper posture.

[Brief explanation of drawings]

The figure shows an embodiment of the seat bag structure according to the present invention, and FIG. 1 is a cross-sectional view of the main part thereof;
FIG. 2 is a schematic exploded perspective view showing the main structure, and FIG. 3 is a schematic side view. In the figure, 1... Vehicle seat, 2... Seat cushion, 3... Reclining mechanism, 4... Seat back, 10... Seat back panel, 11...
...Vertical groove, 12... Seat back frame, 12a
...Back receiving plate, 12b, 12b...Both sides plates, 1
3,13... Reclining device, 14...
Seat cushion frame, 15... padded material,
20, 20... Base, 21... U-shaped part.

Claims (1)

[Scope of utility model registration request] A vertical groove is recessed in the center of the back of the seat back panel that constitutes the back of the seat back, and a seat back frame with a rearward U-shaped cross section is installed and fixed at a predetermined height within this vertical groove. A seat back structure characterized in that a lower end of the back frame is rotatably connected and supported to a seat cushion frame side via a reclining device.