JP2001204579A - Elastic surface body seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic surface body seat capable of providing appropriate lumbar support without impairing its fit, and also of coping with differences in physique among individuals. SOLUTION: An elastic surface body strip 3 is connected to the front of one of right and left seatback frames 1 at one end and to the rear of the other of the seatback frames 1 at the other end. For adjacent elastic surface body strips 3, their mounting positions on the right and left seatback frames 1 are reversed so that the elastic surface body strips 3 cross each other near the center of a seat surface. Near the lumber of the seater, the back of the elastic surface body strip 3 is coupled to a lever 7 longitudinally rotatably attached to the seatback frame 1, and the lever 7 is connected to an operating lever 8 attached to the seatback frame 1, so that the rear end of the elastic surface body strip 3 can be moved longitudinally by operation of the operating lever 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic sheet having an elastic sheet stretched between side frames of the sheet.

[0002]

2. Description of the Related Art A conventional elastic face sheet is disclosed, for example, in Japanese Utility Model Laid-Open No. 61-60759, Japanese Utility Model Laid-Open No. 5-70341.
And Japanese Unexamined Utility Model Publication No. 54-121803. Among them, the elastic face sheet described in Japanese Utility Model Application Laid-Open No. 61-60759 has improved supportability by fixing bag-shaped fabrics having different hardnesses in the upper and lower portions of the seat back and the front and rear of the seat cushion to the seat frame. It is. The elastic face sheet described in Japanese Utility Model Laid-Open Publication No. 5-70341 allows the tension of the elastic face body to be adjusted. Further, the seat frame structure described in Japanese Utility Model Laid-Open No. 54-121803 is characterized in that steel wires are arranged in a zigzag manner between left and right seat frames.

[0003]

However, in the above-mentioned conventional elastic face sheet, the elastic face body has a structure in which the elastic face body is flatly stretched between the left and right frames.
In areas requiring high support pressure, such as the lumbar spine, it is necessary to use an elastic surface body with high hardness or increase the tension of the elastic surface body, so that the amount of deflection when the occupant sits down decreases. The surface may approach a flat surface, and the fit to the body may be reduced. Also, when the occupant's body moves left or right due to the lateral acceleration that occurs when turning a vehicle, etc., and the load concentrates on the left or right side of the elastic surface, the occupant responds to the concentrated load on the left and right opposite sides of the elastic surface. A pulling force is generated, which may cause rocking. The present invention has been made in view of the above-mentioned problems of the related art, and it is possible to obtain appropriate lumbar support without impairing the fit, and in addition, it is possible to finely cope with individual differences in body types. An object is to provide an elastic face sheet.

[0004]

According to a first aspect of the present invention, there is provided an elastic face sheet according to claim 1, wherein a strip-shaped elastic face sheet is stretched between frames of the sheet. The one frame forward,
The other end is connected to the rear of the other frame, and for the adjacent band-shaped elastic face body, the mounting position is reversed so that the band-shaped elastic face body intersects near the center of the seating surface. By connecting the back part of the band-shaped elastic face body to a lever attached so as to be able to rotate back and forth with respect to the frame, and connecting this lever to an operation lever attached to the frame, the operation lever is connected. By operating, the rear end of the band-shaped elastic surface body can be moved back and forth. In the invention according to claim 2,
The elastic face sheet according to claim 1, wherein a rotation axis of the lever is located behind a side frame of the seat back,
The lever can be rotated forward by the operating lever, with a direction along a strip-shaped elastic body connecting the front end of the other side frame and the rotation axis being an initial position.

According to a third aspect of the present invention, in the elastic flat sheet having an elastic flat body stretched between the frames of the seat back, one end of the band-shaped elastic flat body is positioned forward of one of the left and right side frames, and the other end is positioned on the other side. It is connected to the back of the frame, the back part of the band-shaped elastic face body can be rotated back and forth with respect to the side frame, and is connected to a lever elastically supported by the elastic body. , The belt-shaped elastic surface body intersects near the center of the seating surface.

[0006]

According to the elastic face sheet according to the first aspect, the lumbar vertebra is pushed forward by changing the shape of the seat back in the vicinity of the lumbar vertebra while maintaining the concave shape of the seat surface. Therefore, it is possible to obtain lumbar support without impairing the fit. According to the elastic face sheet of the second aspect, the lumbar spine can be pushed forward and the tension of the elastic face body can be increased while maintaining the concave shape of the seat surface, so that it is more appropriate. It is possible to obtain a proper lumbar support. Furthermore, according to the elastic face sheet according to claims 1 and 2,
By providing a plurality of seat cushions and seat backs, it is possible to freely change the longitudinal cross-sectional shape of the seating surface, and it is possible to respond finely to individual differences in body shape.

According to the elastic face sheet according to the third aspect, it is possible to improve the cushioning property and the vibration absorbing property without impairing the fitting property. According to the elastic surface sheet according to the first and third aspects, since the belt-shaped elastic surface members that are different on the left and right sides of the seat back and the seating surface of the cushion support the body of the occupant, the lateral acceleration at the time of turning the vehicle, etc. When a concentrated load is generated on the left or right side of the seat surface, the restoring force unique to the elastic surface and elastic body is generated only on the left and right opposite sides of the seat surface. is there.

[0008]

(Embodiment 1) Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the elastic face sheet according to the first embodiment. In the elastic face body sheet of the present embodiment, a band-shaped elastic face body 3 is attached between the left and right side frames of the seat back frame 1 and the seat cushion frame 2. In the seat back, one end of the elastic body 3 is connected to the front of the seat back frame 1 and the other end is connected to the back of the seat back frame 1. Since the left and right ends of the vertically adjacent strip-shaped elastic face bodies 3 are attached to the seat back frame 1 in the front-rear direction, the adjacent strip-shaped elastic face bodies 3 are attached.
Crosses near the center of the seat. In the seat cushion, one end of the band-shaped elastic surface body 3 is connected above the seat cushion frame 2, and the other end is connected below the seat cushion frame 2. Since the left and right ends of the front and rear adjacent strip-shaped elastic planes 3 are mounted upside down on the seat cushion frame 2, the front and rear adjacent strip-shaped elastic planes 3 intersect near the center of the seating surface. I have.

In the vicinity of the vertebra, as shown in FIGS. 2 to 5, near the lumbar vertebra of each of the left and right seat back frames 1, they are arranged by a rotating shaft 10 and a mounting bracket 12, and are rotatable back and forth. It has two elastic face body back pushing levers 5, and an elastic face body mounting shaft 9 is formed between these two elastic face body pushing levers 5, to which the rear end of the band-like elastic face body 3 is connected. Have been. The rotating shaft 10 is located behind the side frame of the seat back, and the pushing lever 5 is provided at the back of the elastic body.
Is the front end of the side frame of the other seat back and the rotating shaft 10
Has an initial position in the direction along the belt-shaped elastic body 3 connecting the two.

Each of the left and right seatback frames 1 has an operation lever 8 disposed outside and a lever 7 disposed inside, and these are rotatably connected by a rotation shaft 11. The lever 7 is connected to the lever 5 for pushing out the back of the elastic face body by a connecting wire 6.

Left and right seat surface pushing operation levers 8
Is rotated forward to the position indicated by 8 'from the initial position, whereby the elastic plane back pushing lever 5 is rotated forward to the position indicated by 5', and the rear mounting position of the band-shaped elastic plane 3 is 3 'Moves forward to the position indicated by', and the belt-shaped elastic surface body 3 is pulled (△ L), and the tension increases. As a result, the seating surface 4 near the lumbar spine moves forward, and the hardness of the seating surface increases, thereby increasing lumbar support.

Since the present embodiment is configured as described above, it is possible to obtain appropriate lumbar support in the vicinity of the lumbar portion of the seat back while maintaining the concave shape of the seat surface without impairing the fit. is there. In addition, by providing a plurality of the above mechanisms on the seat cushion and the seat back, it is possible to freely change the longitudinal cross-sectional shape of the seating surface, and it is possible to cope with individual differences in body shape (see FIG. 6). .

(Embodiment 2) FIG. 7 shows an elastic face sheet according to Embodiment 2 of the present invention.

In the present embodiment, there are two elastic face body back pushing levers 5 rotatable back and forth, which are disposed by a rotating shaft 10 and a mounting bracket 12, and these two elastic face body pushing parts are pushed out. An elastic face body mounting shaft 9 is formed between the levers 5, and the rear end of the strip-shaped elastic face body 3 is connected to the shaft. The elastic surface body back pushing lever 5 is further configured to generate an elastic force around the rotation axis 10 by the elastic body 13.

Thus, when the occupant is seated, the elastic body 13 generates elasticity in addition to the elasticity of the band-shaped elastic surface body 3, so that the cushioning and vibration can be maintained while maintaining the concave shape of the seating surface and maintaining the fit. It is possible to improve the absorbency. In addition, according to the configuration of the present embodiment, as shown in FIG. 8, different belt-shaped elastic planes 3 support the occupant's body on the left and right sides of the seating surfaces of the seat back and the seat cushion. When concentrated load is generated on the left or right side of the seat surface due to the lateral acceleration, only the restoring force unique to the elastic surface body 3 and the elastic body 13 is generated on the right and left opposite sides of the seat surface. This has the effect that hardly occurs.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an elastic face sheet according to a first embodiment.

FIG. 2 is a cross-sectional view of the vicinity of a seat back lumbar portion according to the first embodiment.

FIG. 3 is a cross-sectional view of the vicinity of a seat back lumbar portion according to the first embodiment.

FIG. 4 is a perspective view showing the vicinity of a seat back lumbar portion according to the first embodiment.

FIG. 5 is a perspective view showing the vicinity of a seat back lumbar portion according to the first embodiment.

FIG. 6 is a perspective view showing an example in which a plurality of seat backs of Embodiment 1 are provided on a seat cushion and a seat back.

FIG. 7 is a perspective view showing a seat back according to a second embodiment.

FIG. 8 is a sectional view showing the operation of the second embodiment.

[Description of Signs] 1 Seat back frame 2 Seat cushion frame 3 Elastic plane 4 Seating surface 5 Elastic plane back pushing lever 6 Connecting wire 7 Lever 8 Operating lever 9 Elastic plane body mounting shaft 10 Rotation axis 11 Rotation axis 12 Mounting bracket 13 Elastic body

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuto Kato 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. In-house (72) Inventor Shunsuke 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Masahiro Egami 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. In-house F-term (reference) 3B084 EA02 EB05 EC05

Claims (3)

[Claims] 1. An elastic face sheet having a strip-shaped elastic face body stretched between frames of the sheet, wherein one end of the strip-shaped elastic face body is joined to the front of one frame and the other end is joined to the rear of the other frame. For the elastic face body, the attachment position is reversed and the belt-like elastic face body is configured to intersect near the center of the seating surface. By connecting the lever to a lever attached so as to be rotatable, and connecting the lever to an operation lever attached to the frame, by operating the operation lever, the rear end of the band-shaped elastic surface body can be moved forward and backward. An elastic face sheet which is movable. 2. The operation lever according to claim 1, wherein a rotation axis of the lever is located behind the side frame of the seat back, and the lever is set to an initial position in a direction along a belt-shaped elastic surface connecting the front end of the other side frame and the rotation axis. The elastic face sheet according to claim 1, wherein the elastic face sheet is rotatable forward by: 3. An elastic face sheet having an elastic face body stretched between frames of a seat back, wherein one end of the band-shaped elastic face body is connected to the front of one of left and right side frames, and the other end is connected to the back of the other side frame. The back of the elastic face body is rotatable back and forth with respect to the side frame, and is connected to the lever elastically supported by the elastic body. An elastic face sheet, wherein face sheets intersect near a center of a seating surface.