Chair for correcting posture and inducing correct posture

Abstract

The present invention relates to a chair which corrects the posture of a student studying or a worker working while sitting on the chair for a long time and induces correct posture, wherein a spring lumbar support formed by connecting a lumbar support unit formed to be inclined forward and a backrest support unit formed vertically with a V-shaped spring bracket is fastened to a sliding hole of a chair backrest formed vertically, elastically presses the lumbar region of a user by the repulsive force of the spring bracket, and pushes a curved portion at an accurate position via vertical and horizontal position adjustment devices. Therefore, the chair can keep the lumbar region upright and open the chest, thereby correcting the posture and inducing correct posture. In addition, the distance between a sliding mat and the popliteal region can be adjusted according to the body shape of the user through a forward / backward adjustment device, thereby minimizing pressure applied to the popliteal region and the thigh and ensuring a comfortable posture.

Description

A chair that corrects posture and promotes good posture

[0001] The present invention relates to a chair that corrects posture and induces a correct posture, and more particularly, to a chair that corrects posture and induces a correct posture, wherein a spring lumbar support formed by connecting a lumbar support formed to be inclined forward and a backrest support formed vertically with a V-shaped spring bracket is fastened to a sliding hole of the backrest of the chair, so that the spring bracket's resilient force pushes the user's lumbar region, while pushing the curved part at the correct position through a vertical and horizontal position adjustment device, thereby straightening the back and straightening the chest, and correcting posture and inducing a correct posture.

[0002] Students or people who sit in a chair for long periods of time to study or work tend to unconsciously bend their backs and lean their necks forward when concentrating on something, causing stiffness in their backs and shoulders and a sore neck. This reduces their ability to concentrate and their learning ability, which in turn reduces their work efficiency.

[0003] Especially, since it is difficult to straighten the back once it is bent due to bad posture, modern people who spend a lot of time sitting on a chair need a functional chair that helps them maintain good posture when sitting.

[0004] To solve these problems, an invention called “chair backrest” is proposed in Korean Patent Publication No. 101670655 (July 15, 2016).

[0005] The invention disclosed above relates to a backrest for a chair, and comprises a frame formed in a square frame shape, a seat installed in the front or inner space of the frame, a lumbar support formed in a shape corresponding to the shape of the user's waist area to support the waist area, a bracket coupled to both sides and the lower end of the frame and coupled to the front so as to allow the lumbar support to be protruded at an adjustable distance, and an elastic means installed between the lumbar support and the bracket to provide elasticity so as to elastically support the lumbar support, thereby obtaining the effect of being able to selectively adjust the degree of protrusion of the lumbar support according to the user's body type and posture by providing the elastic means between the lumbar support and the bracket.

[0006] However, in the case of the chair backrest disclosed in the above document, the backrest frame formed in a square shape is structured to be tilted backwards, so the upper body must be upright in order to maintain a correct posture. However, the prior art does not describe how to upright the upper body, so sufficient effect cannot be expected.

[0007] In Korean Patent Publication No. 101517350 (January 27, 2015), an invention titled “a chair that can induce correct posture and provide comfort when sitting” is proposed.

[0008] The invention disclosed above has the advantage of being able to induce correct posture and comfort when sitting by having the front of the first plate portion, which accommodates the user's thighs and buttocks, be tilted upward and connected to the second plate portion in a curved manner through a connecting portion, so that the user's waist and back are pressed against the chair by the load the moment the user sits, thereby stably supporting the waist and back portion, including the spine, and allowing the user to maintain a correct posture without back pain even when sitting for a long time.

[0009] However, in the case of chairs that can be expected to induce correct posture and provide comfort when sitting as disclosed in the above document, they cannot replace office chairs and are used while installed on the chair. At this time, the user's waist and back naturally come into contact with the backrest of the chair, which initially has the effect of correcting posture, but over time, the comfort of the seat and backrest of the existing chair is offset, and the user's fatigue may increase, which may have the adverse effect.

[0010] [Prior Art Literature]

[0011] [Patent Document]

[0012] (Patent Document 1) Korean Patent Publication No. 101603998 (March 16, 2016) “Chair with variable lumbar support position”

[0013] (Patent Document 2) Korean Patent Publication No. 101670655 (July 15, 2016) “Chair Backrest”

[0014] (Patent Document 3) Korean Patent Publication No. 101517350 (January 27, 2015) “A chair that promotes proper posture and provides comfort when sitting.”

[0015] The present invention relates to a chair that corrects posture and induces a correct posture, and more specifically, to a chair that corrects posture and induces a correct posture by connecting a lumbar support formed to be inclined forward and a backrest support formed vertically with a V-shaped spring bracket, and a spring lumbar support formed by being fastened to a sliding hole of a vertically formed chair backrest, so that the lumbar region of the user is elastically pushed by the repulsive force of the spring bracket, and a curved part is pushed at an accurate position through a vertical and horizontal position adjustment device, thereby straightening the back and straightening the chest.

[0016] Another object of the present invention is to provide a chair that corrects posture and induces good posture by minimizing pressure on the hamstrings and thighs and thereby creating a comfortable posture by adjusting the gap between the sliding mat and the hamstrings to the user's body shape through a forward-backward adjustment device.

[0017] A chair that corrects posture and promotes good posture.

[0018] The above chair includes a spring lumbar support, a thoracic support, a chair backrest and a chair seat,

[0019] The above spring lumbar support is formed to be inclined forward and includes a lumbar support that elastically pushes the lumbar curve with the repulsive force of a spring bracket installed at the bottom, and is formed vertically and is fastened to the backrest of the chair to support the spring lumbar support, a spring bracket that connects the lower part of the lumbar support and the backrest support in a V shape, a height adjustment bolt that is formed symmetrically left and right on the rear of the backrest support in response to the sliding hole of the chair backrest and is inserted and fixed into the sliding hole of the chair backrest to adjust the height of the spring lumbar support to suit the body type of the user by an up-and-down sliding operation, and a front-back adjustment disk that is installed on the height adjustment bolt and is installed between the rear of the backrest support and the chair backrest so as to be in close contact with the chair backrest and adjusts the gap between the spring lumbar support and the chair backrest through forward and backward movement to adjust the angle of the spring lumbar support and the thoracic support to suit the body type of the seated person, and a knob nut that fixes the height adjustment bolt, wherein the spring bracket is a torsion spring formed by forming a spring steel single wire into a V-shaped torsion spring. It includes a plate spring bracket formed by bending a spring bracket and a spring steel plate to form a V-shaped plate spring, and the torsion spring bracket connects a lumbar support and a backrest support symmetrically left and right, and the torsion spring bracket connecting the left side is formed so that the right end of the connecting wire is connected to the lumbar support and the left end is connected to the backrest support, and the torsion spring bracket connecting the right side is formed so that the left end of the connecting wire is connected to the lumbar support and the right end is connected to the backrest support, so that it is divided into left and right, but the length of the connecting wire of the lumbar support is formed shorter than the connecting wire of the backrest support.

[0020] The above thoracic support comprises a thoracic support that supports the thoracic curve and a thoracic support that protrudes horizontally in the front center of the thoracic support, and supports the vertex of the thoracic curve when sitting through the up-and-down sliding operation of the height adjustment bolt, and includes a hard material curved support chin that serves as a reference point for the forward-backward position adjustment of the spring thoracic support and the lumbar support according to the user's body type, and a height adjustment bolt that is formed symmetrically left and right on the rear of the thoracic support corresponding to the sliding hole of the chair backrest and is inserted into the sliding hole of the chair backrest to operate the up-and-down sliding operation to adjust the height of the thoracic support to the user's body type, and a knob nut that fixes the height adjustment bolt.

[0021] The above chair backrest includes a vertically formed backrest frame and a sliding hole formed symmetrically on the left and right of the backrest frame, into which a height adjustment bolt of a spring lumbar support and a height adjustment bolt of a thoracic support are inserted to perform an up-and-down sliding operation.

[0022] The above chair seat is characterized by including a seat frame, a sliding hole formed symmetrically front-to-back in the center of the seat frame and into which a forward-backward adjustment bolt of a sliding mat is inserted to perform a forward-backward sliding operation, a forward-backward adjustment bolt formed symmetrically front-to-back in the center of the bottom surface of the sliding mat corresponding to the sliding hole of the seat frame and inserted into the sliding hole of the seat frame to perform a forward-backward sliding operation to adjust the gap between the sliding mat and the groin, and a knob nut for fixing the forward-backward adjustment bolt.

[0023] Preferably, the spring bracket of the spring lumbar support is characterized by including a torsion spring bracket formed by forming a spring steel wire into a V-shaped torsion spring and a plate spring bracket formed by bending a spring steel plate into a V-shaped plate spring.

[0024] As described above, according to the posture correction chair equipped with a spring lumbar support according to the present invention, the spring lumbar support formed by connecting a lumbar support formed to be inclined forward and a backrest support formed vertically with a V-shaped spring bracket is fastened to a sliding hole of the chair backrest, so that the lumbar region of the user is elastically pushed by the repulsive force of the spring bracket, and the curved part is pushed at an accurate position through a vertical and horizontal position adjustment device, thereby straightening the back and straightening the chest to create a correct posture, thereby having the effect of correcting the posture.

[0025] Additionally, the gap between the sliding mat and the groin can be adjusted to the user's body shape through the front and rear adjustment devices, which minimizes pressure on the groin and thighs and creates a comfortable posture.

[0026] Figure 1 is a perspective view of a chair according to the present invention.

[0027] Figure 2 is a front view of a chair according to the present invention.

[0028] Figure 3 is a rear view of a chair according to the present invention.

[0029] Figure 4 is a side view of a chair including a torsion spring bracket according to the present invention.

[0030] Figure 5 is a side view of a chair including a plate spring bracket according to the present invention.

[0031] Figure 6 is a plan view of a chair according to the present invention.

[0032] Figure 7 is a bottom view of a chair according to the present invention.

[0033] Figure 8 is a front view and a side view of a lumbar support including a torsion spring bracket according to the present invention.

[0034] Figure 9 is a front view and a side view of a lumbar support showing a plate spring bracket according to the present invention.

[0035] Figure 10 is a front view and a side view of a thoracic support according to the present invention.

[0036] A preferred embodiment for more specifically implementing a means for solving the problem to be solved by the present invention will be specifically described through the attached drawings.

[0037] The attached drawings have been enlarged to show only the core contents and omitted the secondary contents in order to make the contents easier to understand, so they should not be interpreted as limited to the scope of the attached drawings.

[0038] As shown in the attached drawings 1 to 4, the characteristics of a chair that corrects posture and induces a correct posture according to a preferred embodiment of the present invention are structured so that the lumbar support member uses the elasticity of a spring to elastically push the lumbar region of the user, and is composed of a spring lumbar support member (100), a thoracic support member (200), a chair backrest (300), and a chair seat member (400).

[0039] At this time, the spring lumbar support (100) includes a lumbar support (120), a backrest support (140), a spring bracket (160), a height adjustment bolt (180), a front / rear adjustment disc (190), and a knob nut (500).

[0040] The thoracic support (200) includes a thoracic support member (220), a curved support jaw (240), a height adjustment bolt (260), and a knob nut (500).

[0041] The chair backrest (300) includes a backrest frame (320) and a sliding hole (340).

[0042] It can be seen that the chair seat (400) includes a seat frame (420), a sliding hole (440), a sliding mat (460), a forward / backward adjustment bolt (480), and a knob nut (500).

[0043] Hereinafter, specific details for carrying out the present invention will be described in more detail with reference to the attached drawings.

[0044] Fig. 1 is a perspective view of a chair according to the present invention, Fig. 2 is a front view of the chair, and Fig. 4 is a side view of the chair.

[0045] As shown in Figures 1, 2, and 4, the chair of the present invention for correcting posture and inducing a proper posture is characterized by having a backrest (300) formed vertically and a lumbar support (100) formed of an elastic body, unlike a backrest chair of the prior art.

[0046] At this time, it can be seen that the spring lumbar support (100) installed on the chair backrest (300) can be adjusted in the up-down and front-back directions, the thoracic support (200) can be adjusted in the up-down direction, and the sliding mat (460) installed on the chair seat can be adjusted in the front-back direction.

[0047] The spine is not a straight line, but has a gentle S-shaped curve. The thoracic vertebrae, which are the bones in the back, have a kyphotic curve around the central axis of the spine, and the lumbar vertebrae, which are the bones in the lower back, have a lordotic curve.

[0048] The reason the spine is not a straight line but has a gentle S-shaped curve is to function as a spring, allowing for natural movement, distributing load, and absorbing external shock.

[0049] To minimize the load on the spine at this time, you need to straighten your chest and keep your head and back straight, but it is not easy to maintain this posture in the currently available chairs with backrests that are inclined backwards.

[0050]

[0051] *Most of the backrests in commercially available chairs are tilted back by about 25 degrees, which is generally thought to help maintain good posture, but in reality, people do not lean their backs against the backrests when working or studying.

[0052] Rather, studying or working while leaning back against a tilted backrest causes a hunched posture, which prevents you from straightening your back, and is a factor in developing a hunched back and turtle neck.

[0053] The present invention was developed to provide a lumbar support that effectively corrects posture by creating a correct posture with the back pressed against the backrest when sitting, thereby complementing the problem of the backward-sloping backrest structure of most chairs.

[0054] The backrest support of a conventional chair is usually made of memory foam and is formed into a curved shape to correspond to the curve of the lower back.

[0055] This is to fill the gap between the curve of the lower back and the back of the chair, making posture comfortable.

[0056]

[0057] *However, it is not possible to achieve correct posture by simply filling the gap between the curved part of the back and the backrest while leaning against the backrest.

[0058] To have good posture, you need to keep your back straight and your chest upright. However, if you lean your back against a tilted backrest, your upper body is already tilted backwards, and in this posture, even if you support your back with the backrest, your back will not be straight and your chest will not be straight.

[0059] The present invention is characterized by accurately pushing the curved parts of the lumbar and thoracic vertebrae while the spine is upright, thereby minimizing the load applied to the spinal line and creating a comfortable and correct posture.

[0060] In order to implement the above technology, the spring lumbar support (100) applied to the chair of the present invention for correcting posture and inducing a correct posture has a structure in which, unlike the lumbar support of the prior art, a lumbar support part (120) formed to be inclined forward and a backrest support part (140) formed vertically are connected in a V shape by a spring bracket (160), as shown in FIGS. 1, 2, and 4, and a height adjustment bolt (180) installed at the rear of the backrest support part (140) formed vertically is fastened to the sliding hole (340) of the chair backrest (300) and fixed to the chair backrest (300), and when the lumbar support part (120) formed to be inclined forward is pushed backward, the spring bracket (160) elastically pushes the lumbar curve to straighten the back and straighten the chest.

[0061] In addition, the spring lumbar support (100) pushes the curved part to the correct position by adjusting the position of the height adjustment bolt (180) and the front / rear adjustment disk (190), so that it is effective in correcting the posture and inducing the correct posture.

[0062] There is a huge difference between the technology of the spring lumbar support (100), which is a feature of the present invention, to flexibly push the curved part of the lumbar spine and the technology of the lumbar support of an existing chair to support the lumbar region.

[0063] The technology of conventional lumbar support is limited to filling the gap between the curve of the lumbar region and the backrest to provide comfort to the lumbar region.

[0064] However, the pushing technology of the present invention not only makes the spinal line comfortable by pushing the lumbar curve with appropriate pressure, but also straightens the spine to create a correct posture.

[0065] In this way, the spring lumbar support (100) of the present invention is a superior technology that induces correct posture by elastically pushing the lumbar region as a countermeasure when the upper body is bent or leaned backward without one's knowledge while sitting on a chair for a long time to work or study, thereby straightening the spine.

[0066] The spring lumbar support (100) is composed of a lumbar support (120), a backrest support (140), a spring bracket (160), a height adjustment bolt (180), and a front-rear adjustment disc (190) as shown in FIGS. 8 and 9.

[0067] At this time, the lumbar support (120) is formed to be inclined forward and the backrest support (140) is formed vertically, and the lower portions of the lumbar support (120) and the backrest support (140) are connected in a V shape with a spring bracket (160) made of spring steel to form a spring lumbar support (100) using an elastic body.

[0068] At this time, the spring bracket (160) includes a torsion spring bracket (162) formed by forming a spring steel wire into a V-shaped torsion spring and a plate spring bracket (164) formed by bending a spring steel plate into a V-shaped plate spring.

[0069] And the torsion spring brackets (162) are connected symmetrically left and right, but the positions of the connecting wires of the right torsion spring bracket (162) and the left torsion spring bracket (162) are reversed to distinguish them as left and right.

[0070] At this time, the torsion spring bracket (162) connected to the left has the wire connecting the lumbar support (120) to the right and the wire connecting the backrest support (140) to the left, and the torsion spring bracket (162) connected to the right has the wire connecting the lumbar support (120) to the left and the wire connecting the backrest support (140) to the right, thereby facilitating the alignment of the lumbar support (120), the backrest support (140), and the torsion spring bracket (162).

[0071] In addition, the rebound strength of the torsion spring bracket (162) and the plate spring bracket (164) are different for 40 kg, 60 kg, 80 kg, and 100 kg based on body weight, respectively, to facilitate user selection.

[0072] The spring lumbar support (100) formed in this way pushes the lumbar support (120) formed to be inclined forward when sitting backward, and the spring bracket (160) installed at the bottom elastically pushes the lumbar curve, so that when sitting, the back is straightened, the chest is straightened, and the posture is maintained and corrected.

[0073] In addition, in the present invention, the lumbar support (120) and the backrest support (140) are provided with up-and-down, front-back position adjustment devices to elastically push the lumbar curve and the thoracic curve at the correct position, thereby straightening the back and straightening the chest.

[0074] To implement this, the chair backrest (300) was formed vertically, and correspondingly, the backrest support part (140) of the spring lumbar support (100) and the rear of the thoracic support (200) were formed vertically.

[0075] This is to be tightly attached to the vertically formed chair backrest (300) and to adjust the height by vertically sliding up and down.

[0076] And, in order to adjust the gap between the spring lumbar support (100) and the chair backrest (300), a front-back adjustment disk (190) is installed on the height adjustment bolt (180) of the spring lumbar support (100). It is installed between the rear of the backrest support (140) and the chair backrest (300), and is in close contact with the chair backrest (300) so that the gap between the spring lumbar support (100) and the chair backrest (300) is adjusted through front-back movement, thereby optimizing the inclination angle of the thoracic support (140) and the spring lumbar support (100) to the user's body type, thereby creating a comfortable and correct posture.

[0077] At this time, height adjustment bolts (180), (260) are formed symmetrically on the left and right sides corresponding to the sliding hole (340) of the chair backrest (300) on the back of the backrest support (140) and the thoracic support (220), and the height adjustment bolts (180), (260) are inserted into the sliding hole (340) of the chair backrest (300) and fixed with a knob nut (500).

[0078] Next, the thoracic support (200) will be described.

[0079] The thoracic support (200) is composed of a thoracic support member (220), a curved support jaw (240), and a height adjustment bolt (260) as shown in FIG. 10.

[0080] At this time, the thoracic support (220) acts as a cushion to support the back and supports the posterior curvature of the thoracic spine.

[0081] And, on the rear side of the thoracic support member (220), a height adjustment bolt (260) is formed symmetrically on both sides corresponding to the sliding hole (340) of the chair backrest (300), and the height adjustment bolt (260) is inserted into the sliding hole (340) of the chair backrest (300) and fixed with a knob nut (500).

[0082] At this time, the height adjustment bolt (260) is inserted into the sliding hole (340) of the chair backrest (300) and adjusts the position to fit the user's body shape through an up-and-down sliding operation, thereby elastically pushing the thoracic curve at the correct position, thereby straightening the back and straightening the chest to create a correct posture.

[0083] And, a hard material curved support ridge (240) is formed horizontally in the front center of the thoracic support (220) so that the user can naturally recognize the position of the vertex of the thoracic curve when sitting, and the front-back and up-down positions of the spring thoracic support (200) and lumbar support (100) are adjusted using the vertex of the thoracic curve as a reference point, making it easy to respond to the user's body type.

[0084] Next, the chair backrest (300) will be described.

[0085] The chair backrest (300) is composed of a backrest frame (320) and a sliding hole (340) as shown in FIGS. 2 and 3, and the backrest frame (320) is erected vertically, unlike the backrest of a general chair.

[0086] At this time, the height adjustment bolt (180) of the spring lumbar support (100) and the height adjustment bolt (260) of the thoracic support (200) are inserted into the sliding holes (340) formed on the left and right sides of the backrest frame (320) to perform an up-and-down sliding operation and are fixed to the backrest frame (320) with a knob nut (500).

[0087] The purpose of vertically setting up the backrest frame (320) in this way is to allow the spring lumbar support (100) and thoracic support (200) to move up and down vertically in response to the spine line being straightened in the correct posture.

[0088] Next, we will explain the chair seat (400).

[0089] The chair seat (400) is composed of a seat frame (420), a sliding hole (440), a sliding mat (460), and a forward / backward adjustment bolt (480) as shown in FIG. 6.7.

[0090] The characteristic of the chair seat (400) is that, while in the conventional chair, the cushion mat is fixed to the seat, in the present invention, the chair seat (400) is formed with a double structure of a seat frame (420) and a sliding mat (460), so that the sliding mat (460) can move back and forth without being fixed to the seat frame (420).

[0091] The reason the sliding mat (460) is moved back and forth as described above is to minimize the pressure on the groin and thighs by adjusting the gap between the front of the sliding mat (460) and the groin to approximately 4 cm when sitting, as blood vessels and nerves are gathered in the groin area, thereby creating a comfortable posture.

[0092] At this time, the sliding mat (460) has a forward / backward adjustment bolt (480) inserted into the sliding hole (440) formed symmetrically in the front and rear of the seat frame (420) and slides back and forth to adjust the gap between the front of the sliding mat (460) and the groin to be optimized for the user's body type.

[0093] And, on the bottom of the sliding mat (460), a front-back adjustment bolt (480) is formed symmetrically in the center front-back direction corresponding to the sliding hole (440) of the seat frame (420), and the front-back adjustment bolt (480) is inserted into the sliding hole (440) of the seat frame (420) and fixed with a knob nut (500).

[0094] At this time, the front-back adjustment bolt (480) is inserted into the sliding hole (440) of the seat frame (420) to perform a front-back sliding operation, thereby optimizing the gap between the front of the sliding mat (460) and the groin to the user's body shape, thereby minimizing the pressure applied to the groin and thighs, thereby creating a comfortable posture.

[0095] Although the technical idea of ​​the posture correction chair with a spring lumbar support of the present invention has been described above with the attached drawings, the present invention is not limited to the above-described embodiment, and all technical ideas within a range equivalent thereto without departing from the gist thereof should be interpreted as being included in the scope of the rights of the present invention.

Claims

1. A chair that corrects posture and promotes good posture. The above chair includes a spring lumbar support (100), a thoracic support (200), a chair backrest (300), and a chair seat (400). The above spring lumbar support (100) is A lumbar support (120) that is formed to be inclined forward and elastically pushes the lumbar curve with the repulsive force of a spring bracket (160) installed at the bottom, A backrest support member (140) that is formed vertically and is attached to the chair backrest (300) to support the spring lumbar support member (100). A spring bracket (160) that connects the lower part of the lumbar support (120) and the backrest support (140) in a V shape, A height adjustment bolt (180) that is formed symmetrically on the back of the backrest support (140) corresponding to the sliding hole (340) of the chair backrest (300) and is inserted into and fixed in the sliding hole (340) of the chair backrest (300) and slides up and down to adjust the height of the spring lumbar support (100) to suit the user's body type. A front-back adjustment disk (190) that is installed between the back of the backrest support (140) and the chair backrest (300) and is in close contact with the chair backrest (300) and moves back and forth to adjust the gap between the spring lumbar support (100) and the chair backrest (300) so that the angle of the spring lumbar support (100) and the thoracic support (200) is adjusted to fit the body shape of the seated person. Including a knob nut (500) that secures the height adjustment bolt (180), The spring bracket (160) includes a torsion spring bracket (162) formed by forming a V-shaped torsion spring with a spring steel single wire, and a plate spring bracket (164) formed by bending a spring steel plate to form a V-shaped plate spring, and the torsion spring bracket (162) connects the lumbar support (120) and the backrest support (140) symmetrically on the left and right, and the torsion spring bracket (162) connecting the left side is formed so that the right end of the connecting wire is connected to the lumbar support (120) and the left end is connected to the backrest support (140), and the torsion spring bracket (162) connecting the right side is formed so that the left end of the connecting wire is connected to the lumbar support (120) and the right end is connected to the backrest support (140), so that it is divided into left and right use, and the length of the connecting wire of the lumbar support (120) is formed shorter than the connecting wire of the backrest support (140). The above thoracic support (200) is A thoracic support (220) that supports the thoracic curve and It is formed to protrude horizontally in the front center of the thoracic support member (220), and supports the vertex of the thoracic curve when sitting through the up-and-down sliding operation of the height adjustment bolt (260), and a hard material curved support jaw (240) that serves as a reference point for the forward-backward up-and-down position adjustment of the spring thoracic support member (200) and lumbar support member (100) according to the user's body type. A height adjustment bolt (260) that is formed symmetrically on the back of the thoracic support member (220) corresponding to the sliding hole (340) of the chair backrest (300) and is inserted into the sliding hole (340) of the chair backrest (300) to perform an up-and-down sliding operation to adjust the height of the thoracic support member (200) to suit the user's body type. Includes a knob nut (500) that secures the height adjustment bolt (260), The above chair backrest (300) is A vertically formed backrest frame (320) and It is formed symmetrically on the left and right of the backrest frame (320) and includes a sliding hole (340) into which a height adjustment bolt (180) of a spring lumbar support (100) and a height adjustment bolt (260) of a thoracic support (200) are inserted to perform an up-and-down sliding operation. The above chair seat (400) is, Seat frame (420) and A sliding hole (440) formed symmetrically in the center of the seat frame (420) and into which a forward / backward adjustment bolt (480) of a sliding mat (460) is inserted to perform a forward / backward sliding operation. A chair that corrects posture and promotes good posture, characterized by including a front-back adjustment bolt (480) that is formed symmetrically in the center of the bottom surface of a sliding mat (460) corresponding to a sliding hole (440) of a seat frame (420) and is inserted into the sliding hole (440) of the seat frame (420) to perform a front-back sliding operation and adjust the gap between the sliding mat (460) and the groin, and a knob nut (500) that fixes the front-back adjustment bolt (480).

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