JP2004065625A - Straight sitting chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a user to keep a posture of sitting straight on a chair, gentle for the waist, for a long period of time without feeling pain. <P>SOLUTION: The straight sitting chair basically consists of a seat surface part and a leg part. The front half of the seat surface part is inclined downward in the front direction, while the rear half is flat. The user's buttocks are supported by the rear half of the seat surface part and the femoral region is supported by the front half of the seat surface part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat chair, more particularly, a narrow front and rear width, and has a seat surface slightly lowered forward, by supporting near the boundary between the user's thighs and buttocks when sitting, The present invention relates to a sitting chair that can easily take a sitting position.
[0002]
[Prior art]
The sitting posture is said to be the most ideal posture for the waist, and it is easy to stand and sit, but recently, few people can maintain this posture for a long time. This is because strong pressure on the lower part of the knee and immobilization (a state in which the lower part cannot be freely moved) cause poor blood circulation, and the lower part of the knee becomes numb.
[0003]
For this reason, seats are sometimes used when seats are forced to be seated, for example, when seats are changed due to a change in the law or the like. However, seat chairs that are conventionally provided have the following two problems and are difficult to use. Not good.
[0004]
In other words, most conventional sitting chairs support a weight by placing a flat seating surface under the buttocks, prevent pressure on the lower knees and reduce numbness of the legs, and place the buttocks on the seating surface. The heel is located in a narrow space below. However, when the heel is located in a narrow space below the seating surface, the flexibility of the lower part of the knee, particularly the ankle, is impaired, and blood circulation is poor, so that long-term use is unbearable.
[0005]
Furthermore, in order to support the buttocks with a flat seating surface, depending on how to sit down, for example, there is a problem that the part in contact with the end of the seating surface is strongly pressed and it becomes painful, and to avoid this, to change the contact of the pressing part There was a surface that was difficult to use, such as raising the hips from the seat surface and moving the sitting chair itself.
[0006]
For these reasons, it has been considered that prolonged sitting is unbearable even when using a sitting chair.
[0007]
[Problems to be solved by the invention]
An object of the present invention is to solve the problem of the conventional seat chair, and to provide a seat chair that can maintain a comfortable sitting posture for a long time without pain for a long time.
[0008]
[Means for Solving the Problems]
The present inventors have studied the shape of the seat surface of the sitting chair, the weight supporting portion, and the like in order to solve the above-described problems. As a result, we found that conventional kneeling chairs can improve the degree of freedom of the lower part of the knee by supporting the vicinity of the boundary between the thigh and buttocks with a narrow front and rear width and a slightly lowered seating surface. Thus, the present invention has been completed.
[0009]
That is, the present invention is a normal seat chair consisting essentially of a seat surface and legs, the front half of the seat surface is lowered forward, the rear half is flat, and the buttocks of the user are the rear half of the seat surface, This is a seat chair in which the thighs are supported by the first half of the seat surface.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to the drawings showing some embodiments of the sitting chair of the present invention.
[0011]
FIG. 1 is a perspective view showing one embodiment of the seat chair of the present invention, and FIG. 2 is a drawing showing a sitting posture when the seat is used. In the figure, reference numeral 1 denotes a sitting chair, 2 denotes a leg, 3 denotes a seat, and 4 denotes a bottom.
[0012]
The feature of the sitting chair of the present invention is that the front half 3 ′ of the seat surface 3 is lowered forward and the rear half is flat. There is no particular limitation on the shape of the front half portion 3 'of the seat lowering forward, and there is no particular limitation. The front lowering portion may be a curved surface that is continuously lowering down, or a frontal lowering from a certain line by two planes. There may be.
[0013]
The reason why the shape of the seating surface is a structure in which the front half portion 3 'of the seating surface is slightly lowered is as shown in FIG. 2 in accordance with the human body curve in the sitting posture. That is, while the conventional sitting chair supported the weight by the buttocks, the sitting chair of the present invention supported the weight near the boundary between the thighs and the buttocks, so that the seat shape was slightly lowered from the front 3 ′ of the seat. It was.
[0014]
The reason for supporting the vicinity of the boundary between the thigh and the buttocks is that the upper body is easily moved back and forth. For this reason, the position of the seating surface can be freely changed according to the user's will, and can withstand a long sitting time. In addition, the feeling of pressure on the back of the thigh is considerably reduced compared to that of the conventional flat seating surface, and furthermore, the front half is lowered forward, so the position of the seating surface can be raised compared to the conventional seating chair, As a result, the ankle and the like can be freely moved.
[0015]
The sitting chair of the present invention includes the seating surface 3 and the legs 2, but a mechanism for facilitating the use thereof may be added.
[0016]
The seating surface 3 in the sitting chair of the present invention is preferably a narrow width, the front-back length of the seating surface width is preferably about 60 mm to 120 mm, and the ratio of the front half 3 ′ and the rear half is: It is preferred to be about 0.5 to 2, especially about 1. When the seating surface width is 120 mm or more, it may be too wide to interfere with the forward and backward movement, and when it is 60 mm or less, the pressure from the seating surface may be too strong.
[0017]
It is desirable that the difference between the height of the front half 3 ′ of the seat surface 3 and the height of the rear half is about 5 mm to 30 mm. If the difference in height is 30 mm or more, the thigh may not be able to be substantially supported, and if it is 5 mm or less, the pressure on the front end of the seat surface becomes strong as in the case of a conventional seat chair, The difference may not be clear.
[0018]
The seating surface 3 may be a general one used for a chair or a chair. For example, with an aggregate having a certain degree of strength, the front half 3 ′ of the seating surface is lowered forward, and the rear half is formed flat, wrapped in a urethane cushion, and further wrapped in cloth or synthetic resin. It can be manufactured by encapsulating in a sheet. Further, it can be directly formed of plastic, wood or metal.
[0019]
Further, since the leg 2 and the bottom 4 supporting the seating surface 3 take a considerable weight, it is desirable that the leg 2 and the bottom 4 are made of a material having high strength, for example, metal such as iron, wood, or hard plastic. Further, as the shape of the leg 2, a plate-like body is used in the above-described embodiment, but the shape is not limited to this, and a metal round bar or a bent pipe may be used.
[0020]
FIG. 3 is a perspective view showing a sitting chair according to another embodiment of the present invention. In this sitting chair, the leg 2 protrudes from the center of the seating surface 3, and the bottom 4 is connected to the bottom 4 so as not to lose the balance.
[0021]
In the sitting chair of this embodiment, the leg 2 is sandwiched between the left and right feet, so that the range in which the lower limb can be moved is widened.
[0022]
4 to 6 show another embodiment of the sitting chair 1 in which the leg 2 can be folded. As shown in the perspective view of FIG. 4, the leg 2 is formed of a metal round bar. 5 and 6 are bottom views of the above embodiment. FIG. 5 shows a state where the leg 2 is closed, and FIG. 6 shows a state where the leg 2 is open.
[0023]
In the sitting chair 1 of the above embodiment, a mounting plate 5 is mounted on the back side of the seating surface 3. The mounting plate 5 is provided with a guide portion 6 so as to form a closed gap with the mounting plate 5. The width of the gap is substantially the same as the thickness of the round bar forming the support member 7, and one end of the support member 7 is slidably mounted in the gap. Further, at both ends of the mounting plate 5, leg mounting portions 8 for rotatably mounting the legs are provided, and one ends of the legs are mounted here. On the other hand, the other end of the support member 7 is rotatably attached to the center of the leg 2 slightly above.
[0024]
4 to 6 has the above-described configuration, and in a normal use state (the state of FIG. 6), the leg 2 receives the force applied to the seat surface 3 from above, The buttocks can be supported, and when carrying, the legs 2 are folded as shown in FIG. 5 to have a compact shape, which is convenient for carrying.
[0025]
Further, the sitting chair 1 in the form of FIG. 7 enables the height of the seating surface 3 to be adjusted. That is, the leg portion 2 is formed by the outer leg 2a and the inner leg 2b, and a screw hole 9 of approximately the same size is formed in each of the legs 2 and screwed at a fixed position with a screw 10 to reduce the height of the seating surface 3. The desired position can be set, and as a result, it is possible to cope with the physique difference to some extent.
[0026]
Furthermore, the drawing shown in FIG. 10 is a seating chair of another embodiment in which the seating surface 3 is extendable. In this seat, the seat 3 is divided into two parts, one of the seats 3a has a sheath shape, and the extension piece 11 connected to the other seat 3b is inserted into the sheath. Has become. With such a mechanism, the entire length of the seating surface 3 can be adjusted, so that it can be used according to the user's physique.
[0027]
In the sitting chair 1 of the present invention described above, after sitting down, the sitting chair is placed under the buttocks, and the knee is bent and the sitting surface 3 is placed near the boundary between the thigh and the buttocks to obtain the sitting posture. It is something that can be done. In addition, the sitting chair 1 of the present invention has a relatively high seating surface 3 as compared with the conventional sitting chair, so that the ankle and the like can be moved freely. Also, since the seat surface 3 is high and the front half is lowered forward, the angle of the knee when sitting straight is not tight, and the position of the center of gravity can be changed from the thigh to the buttocks or vice versa. And numbness is less likely to occur.
[0028]
[Action]
In the sitting chair 1 of the present invention described above, the supporting position of the weight which causes the numbness of the foot and the shape of the seat 3 for supporting the weight are slightly lowered forward, and the position supported by the seat is large. By setting the position near the boundary between the thigh and the buttocks, the leg can be kept in a sitting position for a long time without numbness.
[0029]
【The invention's effect】
The sitting chair of the present invention, by positioning the seat surface narrow in the front-rear direction near the boundary between the thigh and the buttocks, increases the degree of freedom of the lower part of the knee, particularly the ankle, and prevents fixation. It is also possible to touch the buttocks.
[0030]
Further, the movement of the center of gravity of the upper body in the front-rear direction enables intentionally changing the position of a portion strongly in contact with the seat surface, which helps to obtain a sufficient sitting posture even for a long time.
[0031]
Therefore, the sitting chair according to the present invention is such that anyone can continue the sitting posture, which is a sitting posture that is gentle to the waist, for a long time, and can take the sitting posture for a longer time than conventional products. It is.
[Brief description of the drawings]
FIG. 1 is a perspective view of a sitting chair according to one embodiment of the present invention. FIG. 2 is a drawing showing a sitting posture when sitting on the sitting chair of the present invention. FIG. 3 is a perspective view of a sitting chair according to another embodiment of the present invention. FIG. 4 is a perspective view showing a foldable seat chair of the present invention. FIG. 5 is a bottom view of the seat chair of FIG. 4 (in a state in which legs are folded).
FIG. 6 is a bottom view of the sitting chair of FIG. 4 (with the legs opened).
FIG. 7 is a perspective view showing a sitting chair of the present invention in which legs can be extended and contracted. FIG. 8 is a perspective view showing a seated chair of the present invention in which a seating surface can be extended and contracted.
DESCRIPTION OF SYMBOLS 1 ... ... seat chair 2 ... ... leg part 3 ... ... seat surface 3 '... ... seat surface front half part 4 ... ... bottom part 5 ... ... mounting plate 6 ... ... guide part 7 ... ... support member 8 ... ... leg part mounting part 9 ... Screw hole 10 ... Screw 11 ... Extension piece or more

Claims (5)

Basically, an orthopedic chair consisting of a seating surface and a leg, the front half of the seating surface is lowered forward, the rear half is flat, the buttocks of the user are seated on the rear half of the seating surface, and the thighs are seated. A sitting chair designed to be supported in the first half of the surface. 2. The seating chair according to claim 1, wherein the length of the seat surface in the front-rear direction is 60 mm to 120 mm, and the difference between the height of the front half and the height of the rear half is about 5 mm to 30 mm. The seat chair according to claim 1 or 2, wherein the seat surface is supported by a leg protruding from the left, right, or center part. 2. The seating chair according to claim 1, wherein the legs are foldable or extendable. 2. The sitting chair according to claim 1, wherein the seating surface is configured to be foldable or extendable.

Images