JP2004065626A - Seat surface structure and chair using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair allowing a user to stand up/sit down easily, capable of securing an angle to the abdomen part without causing the local pressure or slippage. <P>SOLUTION: The seat surface of the chair consists of a flat rear half part and a front half part inclined downward in the front direction. The inclination angle of the front half part is made into an angle corresponding to that formed between the femoral region and a horizontal plane when a user sits on the chair. The user's buttocks are held by the rear half part and the femoral region is held by the front half part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seat structure used in a chair or the like, and more particularly, to a seat structure excellent in body pressure dispersion and ease of use and a chair using the same.
[0002]
[Prior art]
With the westernization of Japanese life, chairs have become widespread in life, and it is an era when it is impossible to imagine living without chairs, and various chairs are provided according to the usage situation and selfishness .
[0003]
As described above, various types of chairs are provided, and the shapes thereof are various. However, the seat structure of the conventional chair is basically flat, and a part thereof is slightly dented in consideration of the shape of the buttocks. Formed ones are also provided.
[0004]
Basically, when sitting on a chair, the user often takes a sitting posture as shown in FIG. This sitting posture is a sitting posture in which the user sits on a horizontal plane substantially at the height of the knee when standing up, and the weight is supported from the buttocks to the back of the thighs. In this sitting posture, the degree of freedom in the front-back direction is large, and when sitting deeply, the abdominal angle (the angle formed by the upper body and the thigh; in FIG. 1, θ ₁ ) is close to a right angle. Continuing is painful. Therefore, in order to increase the angle of the abdomen, the user tends to sit shallowly near the front end of the seating surface. In this case, the lumbar and thoracic vertebrae are bent and work is likely to occur.
[0005]
2. Description of the Related Art In recent years, as a chair of a type that does not easily turn into a stoop including a neat posture, a chair shown in FIG. 2 called a balance chair or the like has been provided. In this chair, since the abdominal angle (θ ₂ ) is large, there is little pain even if it is used for a long time, but it sits at a position higher than the knee and prevents the chair from falling down due to the seat lowered forward. In addition to the above, there is a problem that it is difficult to sit down, and there is a problem that the shin portion receives pressure from the shin receiving portion, and this portion becomes painful.
[0006]
Recently, office chairs that can be tilted forward to facilitate work are also provided.However, these chairs slide forward if the weight is not supported by the feet because the entire seat surface falls down forward, and after all seating for a long time It was not suitable for work.
[0007]
As described above, the conventional chair has a problem in any of the viewpoints of securing an abdominal angle, local compression, slippage, and the like.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chair that can stand and sit comfortably, secure an abdominal angle, and does not cause local compression or slippage.
[0009]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the above problems, and as a result, divided the seating surface into two parts, while holding the buttocks and the thighs on the other side, thereby improving the stability during use. The present inventors have found that it is possible to support the weight with a wider area without discomfort while securing, and completed the present invention.
[0010]
That is, in the present invention, the seating surface of the chair is constituted by the substantially flat rear half portion and the front lowering front portion, and the front lowering angle of the front half portion is such that the thigh portion is in a horizontal plane when sitting on the chair. An object of the present invention is to provide a seat structure having an angle corresponding to an angle formed therebetween, wherein the rear part holds the buttocks and the front part holds the thighs.
[0011]
Further, the present invention provides the seat structure, wherein the substantially flat rear half and the front lower front half are formed of a continuous material and bent at the boundary, and the front half of the seat has a rear half length. The length of the seat is longer than the length of the seat, and the seating surface can be moved up and down, and the front lowering angle of the front half is correspondingly changed.
[0012]
Further, the present invention provides a chair having the above-mentioned seat structure.
[0013]
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 present invention.
[0014]
FIG. 3 is a perspective view showing one embodiment of a chair having a seat structure according to the present invention. In the figure, 1 indicates a seat surface, 2 indicates a frame, and 3 indicates a backrest. FIG. 4 is a side view showing a use state of the chair of FIG.
[0015]
As shown in FIG. 3, in the seat surface structure of the present invention, the seat surface 1 includes a front half 1a and a rear half 1b, and the front half 1a of the seat is lowered forward and the rear half of the seat is lowered. 1b is substantially flat. Further, the ratio of the length of the first half 1a to the length of the second half 1b is preferably longer in the first half 1a than in the second half 1b. Specifically, the length of the first half 1a is equal to the length of the second half 1b. It is preferably about 1 to 2 times, particularly about 1.2 to 1.6.
[0016]
Although it may change continuously from the first half 1a to the second half 1b, it is preferable to provide a bent portion (A) therebetween and separate the first half 1a from the second half 1b with this as a boundary.
[0017]
It is preferable that the angle at which the front half 1a is lowered forward corresponds to the angle formed between the thigh and the horizontal plane when the user sits on the chair. Specifically, this angle is substantially the same as the angle formed between the thigh and the floor when the user sits on the seat with his buttocks and puts his feet on the floor exactly (from 5). A difference in the range of about 10 ° is acceptable).
[0018]
In order to use the chair of FIG. 3, it is preferable to sit so that the bent portion of the seating surface 1 and the boundaries of the buttocks and thighs are aligned as shown in FIG. By sitting in this manner, the substantially flat rear half 1b supports the buttocks without slipping out, and the front half 1a also supports the back of the thigh, so that the overall feeling of pressure is reduced and the abdominal angle is increased. Because of this, it is possible to continue the sitting posture without any discomfort even for a long time.
[0019]
FIG. 5 is a perspective view showing another embodiment of the chair having the seat structure of the present invention, and FIG. 6 is a drawing showing a use state of the chair.
[0020]
The seat 1 of the chair of FIG. 5 is almost the same as the seat of the chair of FIG. 3, except that a caster 6 is attached to the leg 5 of the support 4 and an office height adjustment device 7 is further provided. It is. In this chair, since the seat height adjusting device 7 is provided, it can be used according to the height of the user and the length of the feet. In the chair of this embodiment, as shown in FIG. 6, since the seating position is lower than that of the chair of FIG. 3, the degree of the front lower part 1a of the seat front half 1a is reduced.
[0021]
In office work such as a personal computer, a forward leaning posture can easily form a natural S-shape of the spine and can reduce the burden on the waist. However, the chair of FIG. 5 having the seat structure of the present invention has a thigh support surface. Has a structure that makes it easy to take a forward leaning posture because it falls down moderately.
[0022]
FIG. 7 is a side view of a chair according to still another embodiment having the seat structure of the present invention. In the chair of this aspect, the seat can be continuously changed from the flat seat to the seat structure of the present invention.
[0023]
Specifically, the front half 1a and the rear half 1b of the seat surface 1 are bendably connected, and the front end of the front half 1a is rotatably attached to the frame 8. In addition, a cylinder 10 from the seat height adjusting device 7 is slidably mounted at the distal end below the rear half 1b.
[0024]
In the chair of this embodiment, the rear half 1b is raised by operating the seat height adjusting device 7 by the lever 9, and accordingly, the rear half side end of the front half 1a is also raised, which is suitable as the front half 1a. It will be in a state of falling forward by a large angle. By adjusting the height of the rear half portion 1b appropriately, it is possible to make the most comfortable state. In this ascent process, the rear half 1b is pulled forward by the front half 1a and moves forward. However, since the tip of the cylinder 10 from the seat height adjustment device is slidably mounted on the rear side of the rear half, The movement does not affect the cylinder 10 or the seat height adjusting device 7 at all.
[0025]
The seat height adjusting device 7 may be a known power source for lifting the seat, such as a spring, a gas shock, or an electric motor.
[0026]
The chair having the seat structure of the present invention described above can be manufactured according to a conventionally known method except for the above. As the material used in the production, a general material used for a chair or a chair can be used. For example, as the seating surface 1 and the backrest 3, use an aggregate of a certain strength wrapped with a urethane cushion and wrapping it with a cloth or synthetic resin sheet, or a plastic, wood or metal material. Can be. Further, since the frame 2, the support 4 or the frame 8 takes a considerable weight, it is desirable to manufacture the material with high strength, for example, a material such as a metal such as iron, wood, or a hard plastic.
[0027]
[Action]
The seat structure according to the present invention has been completed based on the results of intensive studies based on observation of human body behavior. That is, the conventional idea is to hold the buttocks or thighs with a flat surface, but it has been difficult to secure the abdominal angle by this idea. For this reason, attempts have been made to secure the abdominal angle, but in that case, there has been a problem that local compression, slippage and the like occur.
[0028]
On the other hand, in the present invention, the seat surface structure that provides the thigh support surface and the buttocks support surface according to the sitting posture to the seat surface supports the weight without discomfort in a wide area from the thigh to the buttocks, and By maintaining a large abdominal angle, it is possible to take a comfortable sitting posture.
[0029]
【The invention's effect】
The seat structure according to the present invention has a forward-sloping seat surface at an appropriate angle to support the thighs when sitting normally, and a seat surface to support the buttocks, so that it can be used for a long time regardless of usage conditions. , You can continue sitting without discomfort.
[0030]
As described above, the seat structure of the present invention can be advantageously used for a chair that sits for a long time because the weight is dispersed over a large area while maintaining a large abdominal angle, and the seat surface of a home or office chair can be used. It can be widely used as a structure.
[0031]
[Brief description of the drawings]
FIG. 1 is a diagram showing a state of sitting on a conventional chair. FIG. 2 is a diagram showing a state of sitting on a balance chair. FIG. 3 is a diagram showing one embodiment of a chair having a seat structure according to the present invention. Drawing showing the use state of the chair of FIG. 3 [FIG. 5] Drawing showing another embodiment of the chair having the seat structure of the present invention [FIG. 6] Drawing showing the use state of the chair of FIG. 5 [FIG. FIG. 8 is a view showing a chair according to still another embodiment having a seat structure according to the present invention. FIG. 8 is a view showing a use state of the chair in FIG.
1... Seat 1a... Seat front half 1b... Seat rear half A... Bend 2... Frame 3... Backrest 4... Support 5... Leg 6... Casters 7. Height adjustment device 8… Frame 9…… Lever 10…… Cylinder and above

Claims (5)

The substantially flat rear half and the front lower half constitute the seating surface of the chair, and the front lowering angle of the front half is the angle formed by the thigh with the horizontal plane when sitting in the chair. The seat structure has an angle corresponding to that of the above, and holds the buttocks in the second half and the thighs in the first half. 2. The seat structure according to claim 1, wherein the substantially flat rear half portion and the front lowering front half portion are formed of a continuous material, and are bent at a boundary therebetween. The seat structure according to claim 1, wherein the length of the front half is longer than the length of the rear half. 2. The seating structure according to claim 1, wherein the seating surface can be moved up and down, and a front lowering angle of the front half changes correspondingly. A chair having the seat structure according to any one of claims 1 to 4.

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