JPH0347205A - Backrest cushion - Google Patents

Abstract

PURPOSE:To obtain a backrest cushion which prevents a user from lumbago and allows the user to sit in a comfortable condition by a method wherein a cushion is made of cushion materials, and has a wedge of body with an inclined face, to which a curved face is formed. CONSTITUTION:A wedge of body 12 is made of cushion materials such as soft foamed polyurethane, etc., and is a rectangular parallelopiped from, and one end is made thin and the other end thick as for the board thickness. Therefore, viewing the body 12 from the side, the body 12 is of a shape as if a trapezoid is divided into two, but it is rather a shape like a triangle. One of the surfaces of the wedge of body 12 is an inclined face 14, and along which a curve face 15 is formed like a large circular arc-shaped hollow, so this curved face is an inclined curved face 15. Thus, even after sitting for a long time in a constant posture, the cushion prevents a user from lumbago.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Field of Industrial Application) The present invention relates to a standing cushion that is improved to prevent lower back pain that occurs while driving a vehicle.

(Conventional technology) The present invention will be described in detail with reference to FIG.

The chair 1 has a seat surface 2 and a backrest 4 that intersect at one end, so that the angle of the backrest 4 can be changed depending on the sitting posture, such as a forward-leaning posture like when working or a resting posture with the upper body averted. As for the function of the backrest, which is comfortable to sit on when placed in close contact with the user, it is considered important that the backrest 4 distinguishes between the lumbar region and the back surface, and supports the upper body by supporting the two surfaces with different degrees of inclination.

Therefore, ideally, the shape and size of the chair should be made to suit the user, but this is not possible with mass-produced products; There is.

Even with a chair made in this way, it may be fine if you can change your sitting position from time to time, but if you sit in a nearly constant position for a long time, such as when driving a car, your posture may become strained. may occur, causing lower back pain.

The reason for this was that the chair was not suitable to begin with, and the backrest did not support the upper body by separating the lumbar region from the back and supporting the two sides with different degrees of inclination.9 Moreover, the backrest was generally made in a straight line. This was caused by the fact that the driver's back was curved due to fatigue from long hours of driving, and the curved top of the vehicle was just touching the backrest, creating a space between the lumbar region and the backrest, resulting in insufficient support for the lumbar region. .

Even if the angle of the backrest was changed with a reclining seat, the angle of the straight line would only change, and the above-mentioned problem would not be resolved, and it would not be a solution to lower back pain.

As a result, as shown in FIG. 6, small cushions 6 were placed on the seat 2 and backrest 4 of the chair 1 to support the lower back while driving.

(Problem to be solved by the invention) The method of sandwiching a ready-made cushion between the lumbar region and the backrest may be ineffective depending on the size and thickness of the zabuton, or may create a step in the backrest, making it impossible to fully support the lumbar region and the back on two sides. However, the drawback was that it still caused lower back pain.

Another disadvantage is that a single ready-made seat cushion cannot accommodate differences in the driver's body shape or chair, and is therefore unsatisfactory as a measure to prevent back pain.

The present invention has been made to solve these problems, and it is an object of the present invention to provide a standing cushion that prevents lower back pain and allows the user to sit comfortably by simply leaning against the backrest on the seat surface. purpose.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention has the following structure.

A curved surface is formed on the inclined surface of a wedge-shaped main body made of cushioning material, and this cushion is used by leaning against the backrest on a chair seat, thereby making it a leaning cushion.

(Function) By leaning against the backrest on the chair seat so that the curved surface of the wedge-shaped main body is visible, the curved surface comes into contact with the lower back and the backrest is supported by two surfaces with different degrees of inclination. This is what I did.

(Example) Examples of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing the standing cushion of the present invention, Fig. 2 is a perspective view of the wedge-shaped main body shown in Fig. 1, and Fig. 3 is a perspective view of the cover shown in Fig. 1, viewed from the back side. be.

As shown in FIG. 1, the standing cushion 10 includes a wedge-shaped main body 12 indicated by a dotted line, and a cover 20 that covers the wedge-shaped main body.
It consists of.

To explain this in more detail, the wedge-shaped main body 12 is made of a cushioning material such as a soft polyurethane foam.
As shown in FIG. 2, it is a rectangular parallelepiped when viewed from above, and is wedge-shaped with a thinner plate at one end and a thicker plate at the other end.

Therefore, when viewed from the side, the shape is a partial trapezoid, but it is also more like a triangle.

One surface of the wedge-shaped main body 12 is an inclined surface 14, and a curved surface 15 having a large arcuate groove is formed along this inclined surface. Therefore, this curved surface is also an inclined curved surface 15.

This curved surface is the surface that the waist of the body comes into contact with, and the end portion that is thicker in the thickness direction becomes the bottom surface 16 of the wedge-shaped main body and is placed on the seat surface of the chair.

The cover 20 that covers the wedge-shaped main body 12 is made of a bag body 22 made of cloth or the like and set to have substantially the same shape as the wedge-shaped main body.

As shown in FIG. 3, this bag body 22 has a part that comes into contact with the bottom surface 16 of the wedge-shaped main body 12 at one end on the back side 26 side.
An opening 24 is provided, and a zipper 25 is attached to this opening so that it can be opened and closed.9 This cover 20 has a wedge-shaped main body 12 made of cushioning material in the opening 24 in a compressed state. The standing cushion 1o is completed by inserting it, shaping it in the bag, and then closing the zipper 25.

The use of the standing cushion 1o constructed in this way will be explained with reference to FIGS. 4 and 5.

As shown in FIG. 4, the leaning cushion 1o is placed using the seat surface 34 and backrest 32 of the chair 30 so that the curved surface 15 can be seen. If you look at the chair in this state from the side, the backrest will look like a leaning position, as shown in Figure 5.
The presence of this option makes it look like an inverted dogleg.

When sitting on the chair 30 in such a state, the standing cushion is located between the lumbar region 38 of the body and the backrest 32, and is in close contact with the lumbar region 38, as shown in FIG. Furthermore, by sitting with the back portion 36 in close contact with the backrest 32, the above-mentioned ideal support can be obtained.

In other words, the backrest supports the upper body by separating the surfaces that touch the waist and the back, and supports the two surfaces with different degrees of inclination. Therefore, even if a certain posture is maintained for a long period of time, the posture is in a comfortable state, and the occurrence of lower back pain, etc. can be prevented.9 [Effects of the Invention] As explained above, according to the present invention, We were able to obtain many effects by leaning a leaning cushion made of a wedge-shaped main body made of 7-year-old wood against the seat and backrest of a chair.

In other words, by making the straight backrest curve into a dogleg shape in the middle, it comes into close contact with both the waist and back of the body at different angles, supporting the upper body in an ideal manner. Now you can. As a result, a comfortable posture was obtained, which prevented lower back pain even when maintaining a constant posture for a long period of time.

Therefore, this standing cushion can be used to drive a vehicle in which the sitting position cannot be drastically changed mid-way, thereby exhibiting the same effect.

By using materials such as soft polyurethane foam for this leaning cushion, even if it is used on a different chair or by a person with a different body shape, the cushion material will deform and absorb the differences. Therefore, there is no need to remake this standing cushion to suit your chair or body shape.

Furthermore, as explained in the conventional example, polyurethane foam does not have the disadvantage of not being able to be shaped into a wedge shape like a single-shaped cushion with cotton filling, and polyurethane foam is easy to process, making it suitable for mass production. A suitable standing cushion was obtained.

This standing cushion is suitable for chairs for vehicles that are relatively cramped and difficult to move, but
Even when used as a chair in a general household, the performance was the same, and many other effects could be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the standing cushion of the present invention, FIG. 2 is a perspective view of the wedge-shaped main body shown in FIG. 1, and FIG. 3 is a perspective view of the cover shown in FIG. Figures 4 and 5
The figure is an explanatory view of the use of FIG. 1, and FIG. 6 is a perspective view showing a conventional example of the present invention. 10... Standing cushion, 12... Wedge-shaped body, 14... Inclined surface, 15... Curved surface, 16... Bottom surface, 20...Cover 22...Bag body, 24...Opening, 25...Zipper 30...Chair, 32...・Backrest, 34...seat, 36...back, 38...lumbar region,

Claims (1)

[Scope of Claims] A standing cushion comprising a wedge-shaped main body made of a cushioning material and having an inclined surface on at least one side, and a curved surface provided on the inclined surface of the wedge-shaped main body.