KR101815183B1 - Cushion for disc prevention - Google Patents

Abstract

The present invention relates to a cushion for preventing disc. The cushion for preventing disc comprises: a seating portion which is formed for the buttocks to be placed upon when a user sits; and a pair of blade portions which are formed on the upside of the rear of the seating portion to support the users pelvis from the seating portion. An ischium groove is formed at the center of the seating portion. According to the cushion for preventing disc according to the present invention, for modern humans who live in a sitting position for a long time, the center of the seating portion is formed to be penetrated when seating, the weight applied to the ischium of the user is distributed to reduce pain and fatigue, and a right posture is maintained. By employing a blade-type structure surrounding the user from the hip to the pelvis, widening of the pelvis is minimized, and it is possible to naturally take a sitting posture. In addition, a width adjustment band is provided between configurations formed to be symmetric, and it is possible to freely adjust the mechanism in accordance with the body sizes of various users. It is possible to easily attach and detach the cushion to and from a desired portion, thereby improving convenience of the user.

Description

{CUSHION FOR DISC PREVENTION}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a disk preventing cushion, and more particularly, to a disk preventing cushion which can be easily installed in various chairs, easily adjustable to a user, Prevention cushion.

Generally speaking, our country was sitting on the floor or sitting on the floor, but as the culture level improved, the time spent living in a chair or sofa placed indoors is gradually increasing. Especially, as the number of people who sit and live for a long time such as students or office workers increases, the pelvis is likely to spread, and the pelvis is totally or partially distorted, so that the pelvic and spinal diseases are increasing rapidly. In addition, it is caused by traffic congestion, driving for a long time, lack of exercise and sleep, living habits of modern people, and giving birth to women.

As described above, if you sit for a long time, you gradually take a position to tilt your body to one side, or sit on one leg in a twisted position over the other leg, and when you sit, tilt your body by moving the center of your body to one armrest Posture is common. This leads to an abnormality in the lumbar vertebrae, which has a significant effect on the urinary system. The pelvis is likely to protrude to the side where the legs are twisted, and the pelvis on the opposite side tends to contract. And if you lean your body to one side, your spine will bend, and when your right shoulder goes up, you will have a lot of influence on your stomach, pancreas and spleen. If your left shoulder goes up, you will tired the liver and this will affect your digestion.

In addition, there is a problem in that the load applied to the vertebrae increases as the user's weight during the sitting, especially the time of the sitting state, is increased due to the load of the upper body, thereby causing the waist to be broken or the vertebrae to be damaged.

In order to solve this problem, various types of posture correction chairs have been developed. However, many of them are focused on improvement of the backrest structure in order to allow the upper body load of the user to be effectively supported through the backrest, and this is applied collectively to the unspecified majority. That is, it is necessary to purchase an expensive orthodontic chair regardless of the convenience of the user, and since the ultimate effect is not transmitted to the user as it is manufactured without considering the physical characteristics of the user, there is a limit to cause a great effect.

As disclosed in Korean Patent Laid-Open Publication No. 2009-0002645 (published on Mar. 17, 2009), the chair for posture correction and the backrest chair of Korean Patent Laid-Open Publication No. 2000-0066379 .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to minimize the spread of the pelvis through a structure in which a portion where a user's sciatica is located is formed to pass, It is an object of the present invention to provide a disc preventing cushion.

It is another object of the present invention to provide a cushion for preventing disc from being easily detachable to a user's desired place without requiring a separate apparatus or expensive chair, so that the cushion can be used regardless of place or environment.

In order to accomplish the above object, a cushion for preventing disc according to the present invention includes a seating portion formed to seat the buttocks when the user sits down, and a pair of vanes formed at the rear upper side of the seating portion to support the user's pelvis from the seating portion And a seat groove is formed at the center of the seating portion.

Further, the wing portion is formed to extend from both rear edges of the seat portion, and is formed to be curved to receive the user's pelvis.

Further, the wing portion is formed such that its surface area increases from the lower portion to the upper portion.

Further, the wing portion includes a wing portion width adjusting band in the center.

Further, the seating portion includes a seat width adjusting band so that the width of the seat can be adjusted in the longitudinal direction of the iscaly groove.

In addition, the seat width adjustment band is characterized by having a plurality of side portions arranged side by side in the longitudinal direction of the left osteotomy groove.

The seat width adjustment band may further include a front seat width adjustment band and a rear seat width adjustment band centering on the ostial groove.

The air conditioner may further include an air injecting portion formed on one of the seating portion and the wing portion to inject air into the seating portion and the wing portion.

And a seat portion air tube and a wing portion air tube provided inside the seat portion and the wing portion to receive air injected from the air injection portion, wherein the seating portion air tube and the wing portion air tube are communicated with the air tube communicating portion .

According to another aspect of the present invention, there is provided a cushion for preventing disc, comprising: a seating portion formed to seat the buttocks when the user sits down; and a pair of upper and lower seats formed on the rear upper side of the seating portion to support the user's pelvis from the seating portion The left and right sitting portions being symmetrically formed with respect to each other, and the right and left sitting portions are formed symmetrically with respect to each other.

The wing portion is constituted by a left wing portion extending from the rear edge of the left sitting portion and a right wing portion extending from the rear edge of the right sitting portion and the left wing portion and the right wing portion are formed to be curved to receive the user's pelvis .

In addition, the left wing portion and the right wing portion are formed such that the surface area increases from the lower portion toward the upper portion.

The wing portion width adjusting band is further provided between the left wing portion and the right wing portion.

In addition, a seat width adjusting band is provided between the left sitting part and the right sitting part so that the width can be adjusted in the longitudinal direction of the left osteotomy groove.

As the disc preventing cushion of the present invention is recessed or hollowed in the center of the seating portion, the body weight applied to the user's sciatica is dispersed, thereby reducing pain and fatigue at the time of sitting and maintaining the correct posture.

In addition, the adoption of a wing-like structure that wraps the user's hips to the pelvis minimizes the spread of the pelvis and naturally enables a correct sitting posture.

The present invention has the effect of providing a width adjustment band between the symmetrically formed structures so that the mechanism can be freely adjusted according to the body size of different users.

In addition, it is possible to easily attach and detach to a desired place without an expensive apparatus or a separate configuration, thereby increasing the convenience of the user.

1 is a perspective view of a disc preventing cushion according to the present invention.
2 is a rear perspective view of a disc preventing cushion according to the present invention.
FIG. 3 is a view showing a cushion for preventing disc according to the present invention and a state where the user's sciatic nerve is seated when the user sits.
4 is a view showing a state in which a user's pelvis is in contact with a disc preventing cushion according to the present invention.
Fig. 5 is a cross-sectional view of the cushion for preventing disc according to the present invention, wherein (a) is a longitudinal sectional view of the cushion for preventing disc when the cushion is in a ready state, and (b) is a longitudinal sectional view of the cushion for preventing disc when it is in a storage state.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to facilitate the understanding of the technical idea of the present invention, a most preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a cushion for preventing disc according to the present invention, and FIG. 2 is a rear perspective view of a cushion for preventing disc according to the present invention. As shown in Figures 1 and 2, a seat 100 is supported on a chair or floor according to the needs of the user H and a seat 100 for supporting the pelvis of the user H from the seat 100. [ And a pair of wing parts 200 formed on the rear upper side of the seating part 100, and a scallop groove 130 is formed in the center of the seating part 100.

The seating portion 100 is generally longer in length in the transverse direction than in the longitudinal direction to accommodate the user's hips and pelvis. Therefore, the ostial groove 130 formed at the center of the seating portion 100 is formed in the transverse direction.

The area where the weight of the user H is most concentrated at the time of sitting is the sciatica (A). The sciatica is the bone that touches the bottom of the hips when sitting, and there are a pair of right and left sciatica (A). When sitting for a long time, the weight is concentrated to the sciatica (A) of the user (H), fatigue is accumulated, and the posture is changed, and the sciatica (A) tends to spread.

Therefore, in order to accommodate the weight concentrated in the sciatica A with a wider area, the sciatic groove 130 is formed to be long in a lateral direction so as to accommodate a pair of right and left sciatica A. [ The body weight concentrated on the sciatica A is dispersed to the front of the buttocks by the sciatic groove 130 formed long in the lateral direction so as to receive the portion where the sciatica A touches.

The seating portion 100 is supported on the bottom surface and further includes an air layer or a cushion member for supporting the buttocks and the thighs of the user H during sitting to enable a stable seating state and reducing fatigue of the buttocks . This has the effect of giving the user H a comfortable cushioning feeling.

Particularly, the seating part 100 is characterized by using a 3D mesh material. Mesh material is woven with light fabric to disperse the weight to maximize the cushion effect and flexible to user (H) and terrain according to elastic material. Also, it is excellent in durability and air permeability, and can be used for a long time and has an effect of easy washing.

The seating portion 100, which is in contact with the user's thighs and buttocks during sitting, includes a seat width adjusting band 300 so that the width of the seat can be adjusted in the lateral direction of the seat.

At this time, the seat width adjusting bands 300 may be arranged in parallel in the longitudinal direction of the sciatic groove 130. A plurality of the seat width adjusting bands 300 may include a front seat width adjusting band 310 and a rear sitting seat width adjusting band 320 centering on the ostital groove 130.

The wing part 200 is formed to extend from both rear edges of the seating part 100 and is formed to be curved to accommodate the pelvis of the user H in a sitting state, 200 further includes a wing portion width adjusting band 230 at the center so as to be adjustable according to the body shape of the user H.

Generally, products for posture correction and disc prevention are often standardized and released. However, when using a product that does not take into consideration the size and characteristics of the user H, it causes a problem of causing only the side or the deformation of the spine or the pelvis can do.

In order to solve such a problem, the disc preventing cushion of the present invention further includes a wing portion width adjusting band 230 using a material having an elastic force in a wing portion 200 formed to be curved to receive the pelvis of the user H There is an effect that the convenience of use is increased because it is naturally adjusted to the body shape without any additional device or operation of the user H At this time, the wing portion width adjusting band 230 may be used without being limited to the material having elastic force.

When the wing part 200 is extended from the rear edge of the seating part 100, the wing part 200 is bent at a predetermined angle to support the pelvis of the user H, and the surface area increases from the lower part to the upper part, (H) pelvic girdle comfortably accommodate the correct posture induction of various vertebrae disease prevention is effective to prevent.

At this time, silicone rubber is used for the outer surface of the wing portion 200, unlike the seating portion 100. The silicone rubber is stronger than other organic rubbers in that it can not support the pelvis and spine of the user H in the case of the 3D mesh, which is the material of the seating part 100, Purpose.

Silicone rubber has excellent physical characteristics in a wide temperature range of -100 to 350 ° C. Therefore, it has stability against deformation caused by environmental factors or external force, and it has a certain level of frictional force due to the characteristics of rubber, So that a stable sitting posture can be maintained.

Another embodiment of the disc preventing cushion according to the present invention includes a seating part 100 formed to seat the buttocks when the user H is seated and a seating part 100 for supporting the pelvis of the user H from the seating part 100. [ And a pair of wing parts 200 formed on the rear upper side of the seat part 100. The seat back part 130 is formed at the center of the seating part 100 and the seating part 100 is symmetrical A left sitting part 110 and a right sitting part 120. [

The seating portion 100 is generally wider in the transverse direction than the longitudinal direction so as to accommodate the buttocks and pelvis of the user H and the septal groove 130 accommodates a pair of right and left sciatica A So as to extend in the transverse direction.

The seating part 100 supported on the chair or the floor according to the needs of the user H is composed of a left seating part 110 and a right seating part 120 which are formed symmetrically with each other and spaced apart by a predetermined distance. At this time, the left sitting part 110 and the right sitting part 120, which are spaced apart from each other, are connected by the sitting part width adjusting band 300.

The width of the seat width adjusting band 300 can be adjusted in the lateral direction of the seating portion 100 in which the thigh and the buttocks of the user H are in contact during sitting, . The seat width adjusting band 300 includes a front seat width adjusting band 310 and a rear sitting seat width adjusting band 320 centering on the ostial groove 130.

The front seat width adjusting band 310 is positioned in all directions of the left sitting position 110 and the right sitting position 120 where the thigh of the user H is seated when the user H is seated and the left sitting position 110 and the right sitting position (120).

The rear seat width adjustment band 320 is positioned behind the left sitting position 110 and the right sitting position 120 where the hip or pelvis of the user H is in contact with the user H, (120).
The left seated part 110 and the right seated part 120 are provided with first and second bevel groove forming protrusions spaced apart in the longitudinal direction and forming the left and right osteotomy grooves 130 in the lateral direction, Are located facing each other.
Two first ischial groove forming protrusions facing each other are connected by a front seat width adjusting band 310 and two second ischial groove forming protrusions positioned opposite each other on the rear side of the first ischial groove forming protrusion And is connected to the rear seat width adjustment band 320.

The wing portion 200 is composed of a left wing portion 210 extending from the rear edge of the left sitting portion 110 and a right wing portion 220 extending from the rear edge of the right sitting portion 120, ) Of the pelvis.

Each of the left wing portion 210 and the right wing portion 220 is formed symmetrically with respect to each other.

The wing portion width adjusting band 230 may be further disposed between the left wing portion 210 and the right wing portion 220 to adjust the distance between the left wing portion 210 and the right wing portion 220. When the buttocks of the user H are positioned on the left wing portion 210 and the right wing portion 220, the wing portion width adjusting band 230 has an elastic force and is shrunk and relaxed to be adjusted according to the user's body shape, It is possible to maintain the correct posture even when seated.

At this time, the wing portion width adjusting band 230 may be used without limitation if it is a material having an elastic force.

When the left wing part 210 is extended from the rear edge of the left sitting part 110, the left wing part 210 is bent at a predetermined angle to support the left pelvis of the user H, And accommodates the left pelvis of the user H comfortably at the time of sitting.

When the right wing portion 220 is extended from the rear edge of the right sitting portion 120, the right wing portion 220 is bent at a predetermined angle to support the right pelvis of the user H, It accommodates the user's right pelvis comfortably when seated.

3 is a view showing a state in which the scissors A of the user H and the sciatic groove 130 of the disk preventing cushion of the present invention are in contact with each other when the user H is seated in the disk preventing cushion.

The left and right shoulder grooves A and the left and right shoulder grooves A and B are formed in the center of the seating portion 100 so as not to directly contact the seating portion 100 of the user H, 110) is effective to reduce the pain and fatigue caused by sitting for a long time by dispersing the concentrated weight to the front of the user.

In general, the body of the user H is in the form of a "∇ (inverted triangle)" in which the area occupying the hip and pelvis during seating is formed wider than the area of the portion accommodating the thigh.

Therefore, the rear seat width adjusting band 320, which is located behind the sitting part 100 and accommodates the hip and pelvis relatively larger in area than the thigh, is more relaxed than the front sitting part width adjusting band 310 .

In other words, the length L 'in which the rear seat width adjusting band 320, which accommodates an area larger than the length L at which the front seat width adjusting band 310 is extended at the time of seating the user H, .

In this way, the seat width adjusting bands 300 separately positioned at the front and rear of the sitting part 100 are adjusted to fit the body shape of the user H without any additional operation, and the convenience of use and universality There is an increasing effect.

A wing portion width (W2) located at the center of a wing portion (200) formed to extend from both rear edges of the seating portion (100) and curved to cover the pelvis of the user (H) The adjustment band 230 is effective to relax the user H in accordance with the body shape of the user when the pelvis of the user H is positioned in the wing portion 200,

Further, the wing portion width adjusting band 230 uses a material having an elastic force to shrink after relaxation, so that the wing portion width adjusting band 230 contracts when the user is separated from the cushion.

4 is a view showing a state in which the disc preventing cushion according to the present invention is in contact with the pelvis of the user H in a sitting state.

In the pelvis, there are pelvic bones formed by the buttocks, buttocks, and dorsal bones on the left and right sides. These are connected to the ankle bones and the buttock joints on the back of the pelvis. . The width of the left and right is wider than the width of the front and back, and the shape of the funnel becomes narrower as it goes downward, and an important internal organ is located in it. Therefore, in order to accommodate such a pelvis, the cushion for preventing a disc according to the present invention has a wider width than the longitudinal direction and a wider lateral direction than the longitudinal direction.

Generally, the sciatica (A) protrudes most to the lower back of the pelvis, so it touches the floor when sitting. The disc preventing cushion according to the present invention is formed in such a manner that the left and right skeletal grooves 130 are formed in the lateral direction so as not to directly touch the seating portion 100 It has the effect of relieving the concentration of weight.

In other words, to reduce the fatigue caused by the weight of the user H being concentrated on the sciatica A having a narrow area, the depressed or hollowed sciatic groove 130 is formed so that the sciatica A does not directly touch the bottom surface, The weight is distributed by the area of the flat surface of the buttocks corresponding to the area of the left osteotomy groove 130 formed to be long in the transverse direction.

The wing width adjusting band 230, which is loosened according to the body shape of the user H, has a property of continuously shrinking. Therefore, when a certain level of pressure is applied to the user's pelvis when the user H is seated, To induce pelvic correction.

A certain level of pressure applied to the pelvis of the user H is indicated by the arrow in Fig.

In the seat cushion of the present invention, the wing width adjusting band 230 and the seat width adjusting band 300 are relaxed to fit the user's body. The relaxed wing portion width adjusting band 230 and the seat width adjusting band 300 have a property of shrinking due to the elastic force of the material, which is obstructed by the body shape or the weight of the user H. In this manner, there is an effect of providing a more comfortable and comfortable seated feeling by shrinking and relaxing according to the movement and the body shape of the user who is seated.

That is, the wing portion width adjusting band 230 and the sitting portion width adjusting band 300, which are respectively relaxed to accommodate the body shape of the user H at the time of sitting, naturally change the pelvis and buttocks of the user H So that the left sitting part 110 and the right sitting part 120 are pressed and tightened from both sides to stably support the buttocks and can cope with a wide variety of users H of various sizes.

A left wing portion 210 extending from the rear edge of the left and right western part 110 for receiving the left pelvis of the user H and a right wing portion 210 extending from the rear edge of the right sitting portion 120 for receiving the right pelvis of the user The wing parts 220 are a pair and the pair of wing parts 200 are formed by being curved so as to be more closely contacted with the curved pelvis and extended at a predetermined angle from the rear edge so as to receive the pelvis of the user H.

The pair of wing parts 200 are symmetrically formed with a predetermined spacing which are connected to each other by a wing width adjusting band 230 and cooperate with each other to serve as a single backrest.

Therefore, not only the hips of the user H but also the portion where the buttocks and the vertebrae meet are supported by the backrest when the user H is seated, so that the user H can stably sit without giving any pressure to the back or the bones. Through this, it is possible to relieve pain and improve the comfort of the joint area with the most pain according to the imbalance of the posture.

5 is a cross-sectional view of a cushion for preventing disc according to the present invention. Fig. 5 (a) is a longitudinal sectional view when the disk-preventing cushion is in a ready state for use, and Fig. 5 (b) is a longitudinal sectional view when the disk-

The disc preventing cushion according to the present invention may further include an air tube therein. The air tube formed inside the seating part 100 includes a seating part air tube 410 located inside the seating part 100 and a wing air tube 420 located inside the wing part 200. [

The user injects air through the air injection unit 400 directly or externally using a separate machine. 5 (a) and 5 (b), the air injecting unit 400 may be positioned at one side of the seating unit 100, but it is not limited thereto and may be formed at a suitable site on one side of the disc preventing cushion.

Air to be injected through the air injecting unit 400 is introduced into the seat air tube 410 or the wing air tube 420 in the wing unit 200 inside the seating unit 100 where the air injecting unit 400 is located, . That is, when the air injecting part 400 is formed in the seating part 100, the air injected from the outside is injected through the seating part air tube 410 and the wing air tube 420 And the user is seated as shown in Fig. 5 (a).

When the air injecting part 400 is formed in the wing part 200, the air injected from the outside is injected through the wing air tube 420 and passed through the wing air tube 420 to the seat part air tube 410 So that the user can be seated as shown in Fig. 5 (a).

Thus, the air injected from the outside into the air injection unit 400 gives a feeling of a seated seating feeling when the user H is seated and actively copes with the movement. By injecting and discharging air directly by the user H, A suitable amount of air can be adjusted to meet the requirements.

In addition, as the air is present in an expanded state in the seating part air tube 410 and the wing air tube 420, the air serves to disperse the weight of the user H.

The seating portion air tube 410 and the wing portion air tube 420 are connected to each other by an air tube communication portion 430 having a narrower width than the seating portion air tube 410 and the wing portion air tube 420, .

The air tube communicating part 430 is configured such that when the air injected into the air injecting part 400 located in the seating part 100 is injected into the seating part air tube 410 inside the seating part 100, The air is moved from the seating portion air tube 410 to the wing portion air tube 420 through the air suction portion 430 to be seated by the user.

When the air injected into the air injection unit 400 located in the wing unit 200 is injected into the wing air tube 420 inside the wing unit 200, Air is moved from the air bag 420 to the seating air tube 410 so that the user can sit on the seat.

At this time, the air tube communication part 430 is formed to be narrower than the widths of the seating part air tube 410 and the wing air tube 420. This is to reduce the resistance when folding air for discharging the air after movement and storage, and to protect it from deformation and breakage due to repeated folding.

The air tube communication portion 430 is formed to have the same width as the seating portion air tube 410 and the wing portion air tube 420 but may be finished except for a portion where air flows. This is for protecting the air tube communication part 430 and the pressure due to the sudden seating of the user H is applied so that the air injected into the seating part air tube 410 and the wing part air tube 420 is directed to one side It is possible to tear or break by the concentrated phenomenon. Especially, since the narrow space is very weak, it is effective to protect the peripheral part from damage by processing the peripheral part in order to solve it.

FIG. 5 (b) is a schematic view of discharging the air in the seating portion air tube 410 and the wing portion air tube 420 to the outside through the air injection portion 400 after sitting. That is, the air is discharged from the air injection unit 400 that injects air into the disc preventing cushion.

This is for deforming a cushion maintaining a constant shape as shown in FIG. 5 (a). When the air inside is deformed, it is folded as shown in FIG. 5 (b).

The seating part air tube 410 and the wing air tube 420 may be mounted on the front side of the respective seating part 100 and the wing part 200 without being located inside the disk preventing cushion, . This is for improving the seating feeling of the user H, and a repellent material such as foamed urethane resin can be used. And is formed in the seating portion 100 to be elastically deformed along the shape of the user's hip so as to maintain a stable posture and is formed in the wing portion 200 so that the upper portion of the upper portion The load is more comfortably supported.

Further, a plurality of embossings may be formed at a position where the buttocks of the user H touch, thereby further improving the seated feeling.

The seating part 100 and the seating part air tube 410 and the wing part air tube 420 located inside the wing part 200 of the cushion for preventing disc according to the present invention are made of synthetic resin. The synthetic resin can stably support the buttocks of the user H and provides a sense of volume to reinforce the surface pressing strength of the seating part 100 and has durability against deformation and breakage due to repeated seating. The synthetic resin may be PVC (polyvinyl chloride) or neoprene, or may be a tube synthesized of PVC and neoprene.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: seating portion 110: left seat portion
120: right sitting part 130:
200: wing portion 210: left wing portion
220: right wing part 230: wing part width adjusting band
300: seat width adjustment band 310: front seat width adjustment band
320: rear seat width control band 400:
410: seat portion air tube 420: wing portion air tube
430: air tube communication part A:
H: User

Claims (14)

delete delete delete delete delete delete delete delete delete A seating portion formed so that the buttocks are seated when the user is seated; And
And a pair of wing portions formed on the rear upper side of the seating portion to support the user's pelvis from the seating portion,
A seat back groove is formed at the center of the seating portion,
Wherein the seating portion is composed of a left-sitting portion and a right-sitting portion which are formed symmetrically with each other,
The wing portion is constituted by a left wing portion extending from the rear edge of the left sitting portion and a right wing portion extending from the rear edge of the right sitting portion,
Wherein the left wing portion and the right wing portion are curved so as to receive the user's pelvis so that a space is formed between the left sitting portion and the right sitting portion to receive the pelvis,
Wherein the left wing portion and the right wing portion are formed so that the surface area increases from the lower portion toward the upper portion,
Both end portions of the left wing portion and the right wing portion are connected by a wing portion width adjusting band having elasticity,
Wherein the seat back width adjusting band includes a front seat width adjusting band having elasticity and a rear sitting leg width adjusting band located at the rear with respect to the center of the seat,
Wherein the left seated portion and the right seated portion are provided with first and second isometric grooved protrusions spaced apart in the longitudinal direction and extending longitudinally in the transverse direction to face each other and facing each other, The two first ischial groove forming protrusions located opposite to each other are connected by the front seat width adjusting band and the two second ischal groove forming protrusions positioned facing each other from the rear side of the first ischial groove forming protrusion, Wherein the cushion is connected to a width control band. delete delete delete delete

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