JP2001353041A - Back pad of seat back - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back pad of a seat back that prevents excessive load from acting on the thoracic vertebrae and the lumbar vertebrae, and resultantly prevents fatigue from accumulating or lumbago from occurring due to long automobile driving. SOLUTION: The back pad of a seat back has a form following the S shape of the spine, slightly sinking in the middle upper portion and slightly projecting in the middle lower portion, and has reinforcing ribs in the back, and many slits opened almost overall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle seat,
The present invention relates to a backrest for a seat back used by being set on a surface of a seat back (back seat) such as an office seat or a furniture seat.

[0002]

2. Description of the Related Art In general, a seat back such as an automobile seat is too soft, and an excessive load is applied to a waist and a spine, resulting in low back pain and accumulation of fatigue.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to prevent the thoracic spine and lumbar spine from being overburdened. Another object of the present invention is to provide a backrest for a seat back which does not cause fatigue or low back pain even when driving a car for a long time.

[0004]

The backrest for a seatback according to the present invention has a shape similar to the S-shaped line of a spine in which the upper middle portion is slightly concave and the lower middle portion is slightly convex. It is characterized in that a reinforcing rib is provided in the portion and a large number of openings are opened almost over the entire surface. It is also characterized in that the back is gently curved inward so as to wrap slightly from both left and right sides. Furthermore, the opening is formed of a number of horizontally long slits.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a vehicle seat, and a seat cushion (seat surface) 1
a, a seat back (back seat) 1b, and a headrest 1c
Consists of A backrest 2 is set on the surface of the seat back 1b. Reference numeral 3 denotes a suspension string, which is bound at the rear end of the upper end of the seat back 1b. The means for suspending the backrest 2 is not limited to the suspending cord 3 so that the backrest 2 can be adjusted to a vertical (height) position in accordance with the sitting height of a person (seated person) sitting on the seat 1. Any material can be used as long as it can be hung, but it is preferable that the material be as flexible and soft as possible. Reference numeral 4 denotes a lower fixing cord for fixing the suspended backrest 2 to be positioned at the center so as not to swing right and left. In the case of the automobile seat 1, it is sufficient to provide it on the outside (door side), but it may be attached on the inside, or it may be omitted when unnecessary.

FIG. 2 shows the structure of the backrest 2, which is basically integrally formed of a hard synthetic resin. As shown in FIG. 2 (E), the backrest 2 is gently curved inward so as to slightly wrap the back of the occupant from both left and right sides, while the backrest 2 is particularly curved in FIG.
As can be seen from (D), the upper middle portion is a concave portion 2a slightly recessed inward, and the lower middle portion is a slightly convex portion 2b outward.

[0007] Around the backrest 2, in particular, FIG.
As can be seen from (B), the outer peripheral step portion 2c is formed and reinforced. 2d is a reinforcing rib integrally formed on the back of the backrest 2 vertically and horizontally.

Reference numeral 2e denotes an opening, which softens the hardness of the backrest 2 made of a hard resin as a whole, adapts it to the body of the seated occupant, and presses against the body or the seat back 1b pressed from both sides. The frictional resistance is increased so that the weight can be easily transmitted to the seat back 1b through the backrest 2, and as a result, the seat back 1b can support more weight. In addition, the opening 2e has a sweating function for the occupant and a massage function. The opening 2e is
Although a horizontally long slit shape is preferable as in the embodiment, the present invention is not limited to this, and any slit shape may be used as long as the above-described function as the opening 2e is not impaired.

In particular, as shown in FIG. 3 (B), the clothes W of the occupant bites into the opening 2e of the backrest 2, and the weight is suspended on the lower portion 2f of the opening 2e. Therefore, large friction occurs between the backrest 2 having such a large number of openings 2e and the back of the occupant, and as a result, the head and upper body of the occupant in the concave portion 2a (between X and Y points). Of the thoracic spine S and the lumbar spine K are reduced. In addition, the convex portion 2b
(Between Y and Z points), the thoracic vertebra S is supported so as to have an S-shape closer to the natural body, thereby reducing the burden on the lumbar spine K,
It is designed to reduce fatigue even when driving for a long time.

FIG. 4 illustrates a method of adjusting the position and the state of the backrest 2 when the backrest 2 is used.
(A) shows a state in which the pad P is sandwiched between the upper end and the lower end of the backrest 2 when the seat back 1b is soft. In addition, as shown in FIG.
When b is hard, the pad P is moved downward and pinched so that the head and the headrest 1c are close to each other. However, the pad P is removed when the distance is too close or when the seat cushion 1a needs to be deep. Further, FIG.
As shown in (C), when it is desired to push the back strongly or when the seat cushion 1a is too short due to short stature, a towel T or the like is wound around the pad P in addition to the pad P.

The backrest of the present invention may be used not only when it is set on the surface of a seatback but also when it is wrapped with a cover made of cloth or the like. In this case, a pad such as urethane may be packed together in the cover. Further, it may be stored inside the seat back.

[0012]

As described above, 1) it has a shape following the S-shaped line of the spine in which the middle upper part is slightly concave and the middle lower part is slightly convex, and has a reinforcing rib on the back part, and almost all over the whole surface. With a large number of openings across it, friction between the occupant and the backrest increases, and as a result, there is no risk that the weight of the head and upper body is concentrated on the thoracic and lumbar vertebrae, and the person sits for a long time. There is no need to worry about tiredness or back pain. Further, there is no fear that the sweating action is hindered by the opening. 2) Since the back is gently curved inward so as to wrap slightly from both the left and right sides, the body can be stably supported for a long time.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment in which a backrest of the present invention is set on an automobile seat.

FIG. 2 is a front view (A), a rear view (B), a side view (C), an end view (D), and a low view showing an embodiment of a backrest.
It is an end view (E).

FIG. 3 is a functional explanatory view (A) and a partially enlarged explanatory view (B) of the embodiment of the backrest in FIG. 1;

FIG. 4 is an explanatory view of adjustment of the embodiment of the backrest of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automotive seat 1a Seat cushion 1b Seat back 1c Headrest 2 Backrest 2a Concave part 2b Convex part 2c Outer edge step 2d Reinforcement rib 2e Opening 2f Backrest part K Lumbar P pad S Chest vertebra X Concave Y Convex W Clothing

Claims (3)

[Claims] An intermediate upper portion is slightly concave, and a lower intermediate portion has a shape similar to an S-shaped line of a spine having a slightly convex shape, a reinforcing rib is provided on a back surface, and over substantially the entire surface. A backrest for a seat back, characterized by having a number of openings. 2. The seat back according to claim 1, wherein the back is gently curved inward so as to slightly wrap the back from both left and right sides. 3. The backrest for a seat back according to claim 1, wherein the opening is formed of a number of horizontally long slits.