Lumbar support chair

Abstract

The present invention relates to a lumbar support chair. According to the present invention, a backrest of the chair is brought into close contact with the lower back region of a user's body in response to the user's weight, guiding the user to sit properly with his or her lower back firmly supported, and thus, lumbar health can be enhanced and lumbar pain can be alleviated.

Description

lumbar support chair

[0001] The present invention relates to a lumbar support chair, and more specifically, to a lumbar support chair in which an elastic deformation space is provided between a seat plate and a surface, so that when a user sits on it, the seat plate is elastically deformed in the direction of the surface due to a load, thereby supporting the user's lower back and enabling posture correction.

[0002] Not only students and office workers, but the majority of people spend a significant amount of time sitting in chairs during their daily lives. While seated, the weight of the upper body acts on the spine, placing stress on the spine and surrounding muscles, which leads to fatigue and pain.

[0003] Therefore, in order to distribute the load of the upper body acting on the spine and relieve stress on the surrounding muscles, it is necessary to sit in the correct posture with the back straight and the hips deep in the chair.

[0004] As a prior art to solve this problem, there is a posture correction chair disclosed in Korean Registered Patent No. 10-2303524. A posture correction chair of the prior art includes a first receiving portion that accommodates the thighs and buttocks when a user is seated, a second receiving portion that accommodates the waist and back when a user is seated, and a connecting portion that curves to connect the first receiving portion and the second receiving portion and is positioned where the back of the buttocks is located when a user is seated. The first receiving portion has a central protrusion formed such that the front center protrudes upward relative to the area where the buttocks are seated, and the second receiving portion has a shape that is curved forward in the longitudinal direction. A virtual centerline is provided that divides the first receiving portion and the second receiving portion in the longitudinal direction, and the second receiving portion is configured to have a shape in which both sides of the first receiving portion contract forward relative to the centerline. According to this posture correction chair, when a user leans their back against the second receiving portion, both sides of the first receiving portion contract inward relative to the centerline, thereby preventing the user from sitting in an improper posture and minimizing the disruption of the posture.

[0005] However, the aforementioned conventional posture correction chairs have the disadvantage of requiring a uniform posture regardless of the user's physical condition, and they also have the problem of significantly restricting the movement of the thighs. Furthermore, conventional posture correction chairs also have the problem of being unable to fix the user's lower back in an upright position.

[0006] The objective of the present invention is to solve the aforementioned conventional problems by providing a lumbar support chair capable of supporting the user's lower back and enabling posture correction, wherein an elastic deformation space is provided between the seat plate and the placement surface, so that when a user sits on it, the seat plate is elastically deformed in the direction of the placement surface due to the load.

[0007] The above objective is achieved by a lumbar support chair according to the present invention, comprising: a seat plate that accommodates buttocks and thighs; and a backrest connected to the seat plate and supporting the lower back, wherein an elastic deformation space is provided between the seat plate and the positioning surface, so that when a user sits, the seat plate is elastically deformed in the direction of the positioning surface, thereby causing the backrest to come into close contact with the lower back.

[0008] Additionally, the seat plate includes a deformation portion formed to be curved upward and a contact portion in contact with a placement surface, and the elastic deformation space may be provided such that one end of the seat plate and the contact portion are in contact with the placement surface.

[0009] Additionally, the elastic deformation space includes a first elastic deformation space provided in front of a virtual reference plane that equally divides the seat plate into front and back, and a second elastic deformation space provided behind the reference plane, and the volume of the second elastic deformation space may be larger than the volume of the first elastic deformation space.

[0010] In addition, a plurality of insertion grooves are formed in the seat plate and the backrest, and a pressure point protrusion may be installed in each of the plurality of insertion grooves.

[0011] In addition, the seat plate is provided with a connecting part that connects the seat plate and the backrest, and at one end of the connecting part, a tension projection made of an elastic material is provided, and the elastic deformation space can be formed by the seat plate rising from the placement surface by the tension projection.

[0012] In addition, the above connecting part may be provided with an elastic adjustment means for adjusting the strength of the contact force with which the backrest is in close contact with the lower back.

[0013] According to the present invention, since the backrest is in close contact with the lower back due to the user's weight, the lower back is firmly supported and sitting in the correct posture is induced, thereby promoting lower back health and alleviating lower back pain.

[0014] In addition, according to the present invention, since the support force of the backrest increases or decreases in proportion to the user's load, it receives appropriate pressure that does not burden the lower back, thereby providing the effect of personalized lower back support.

[0015] In addition, according to the present invention, the thighs and buttocks are massaged by the acupressure protrusions provided on the seat plate, thereby having the effect of significantly improving blood circulation in the body.

[0016] In addition, according to the present invention, since a seat cover and a backrest cover including a cushion are provided, the user's weight is distributed, thereby significantly improving the seating comfort.

[0017] Meanwhile, the effects of the present invention are not limited to those mentioned above, and various effects may be included within the scope obvious to a person skilled in the art from the contents described below.

[0018] FIG. 1 is a perspective view of a waist support chair according to a first embodiment of the present invention, and

[0019] FIG. 2 is a front view of a waist support chair according to a first embodiment of the present invention, and

[0020] FIG. 3 is a top view of a waist support chair according to a first embodiment of the present invention, and

[0021] FIG. 4 is a side view of a lumbar support chair according to a first embodiment of the present invention, and

[0022] FIG. 5 illustrates that when a load is applied to a lumbar support chair according to the first embodiment of the present invention, the seat plate is elastically deformed and the backrest moves forward.

[0023] FIG. 6 is a diagram showing the usage state of a lumbar support chair according to the first embodiment of the present invention, and

[0024] FIG. 7 illustrates the installation of acupressure protrusions on a waist support chair according to the first embodiment of the present invention, and

[0025] FIG. 8 illustrates an insertion groove of a waist support chair according to a first embodiment of the present invention, and

[0026] FIG. 9 illustrates an acupressure projection of a waist support chair according to a first embodiment of the present invention, and

[0027] FIG. 10 illustrates a lumbar support chair according to the first embodiment of the present invention with a seat cover and a backrest cover installed thereon, and

[0028] FIG. 11 illustrates a waist support chair according to a first embodiment of the present invention having an elastic adjustment means installed therein, and

[0029] FIG. 12 illustrates a lumbar support chair according to the first embodiment of the present invention with a chair leg attached thereto, and

[0030] FIG. 13 is a perspective view of a waist support chair according to a second embodiment of the present invention, and

[0031] FIG. 14 is a front view of a lumbar support chair according to a second embodiment of the present invention, and

[0032] FIG. 15 is a top view of a waist support chair according to a second embodiment of the present invention, and

[0033] FIG. 16 is a side view of a lumbar support chair according to a second embodiment of the present invention, and

[0034] FIG. 17 illustrates that when a load is applied to a lumbar support chair according to a second embodiment of the present invention, the seat plate is elastically deformed and the backrest moves forward.

[0035] FIG. 18 illustrates the adjustment of a lumbar support chair according to a second embodiment of the present invention, and

[0036] FIG. 19 is a flowchart of the operation sequence of a lumbar support chair according to a first embodiment of the present invention, and

[0037] FIG. 20 is a flowchart of the operation sequence of a waist support chair according to a second embodiment of the present invention.

[0038] Hereinafter, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings.

[0039] Furthermore, in describing embodiments of the present invention, if it is determined that a detailed description of related known configurations or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0040] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are used merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms used.

[0041]

[0042] From now on, a waist support chair (100) according to the first embodiment of the present invention will be described in detail with reference to the attached drawings.

[0043] FIG. 1 is a perspective view of a lumbar support chair according to a first embodiment of the present invention, FIG. 2 is a front view of a lumbar support chair according to a first embodiment of the present invention, FIG. 3 is a top view of a lumbar support chair according to a first embodiment of the present invention, FIG. 4 is a side view of a lumbar support chair according to a first embodiment of the present invention, FIG. 5 illustrates that when a load is applied to a lumbar support chair according to a first embodiment of the present invention, the seat plate is elastically deformed and the backrest moves forward, FIG. 6 is a diagram showing the usage state of a lumbar support chair according to a first embodiment of the present invention, FIG. 7 illustrates that an acupressure protrusion is installed on a lumbar support chair according to a first embodiment of the present invention, FIG. 8 illustrates an insertion groove of a lumbar support chair according to a first embodiment of the present invention, FIG. 9 illustrates an acupressure protrusion of a lumbar support chair according to a first embodiment of the present invention, and FIG. 10 illustrates a lumbar support chair according to a first embodiment of the present invention FIG. 11 illustrates a lumbar support chair according to the first embodiment of the present invention with an elastic adjustment means installed, FIG. 12 illustrates a lumbar support chair according to the first embodiment of the present invention with a chair leg attached.

[0044] As illustrated in FIGS. 1 to 12, a waist support chair (100) according to the first embodiment of the present invention comprises a seat plate (110), a backrest (120), a reinforcing rib (130), a pressure point protrusion (140), a seat plate cover (150), a backrest cover (160), an elastic adjustment means (170), and a leg connecting part (180).

[0045] The seat plate (110) is a surface on which the buttocks and thighs are accommodated, and can be placed on the surface of placement.

[0046] Additionally, the seat plate (110) is connected to the backrest (120) described later and may be made of an elastic material. The elastic material includes, for example, synthetic resin, metal, wood, etc., but is not limited thereto, and any material that has elasticity may be used.

[0047] More specifically, the seat plate (110) has an overall rectangular shape, but its width increases toward one end, and the ends on both sides of the end can be formed in a curved shape. Additionally, the middle part of the end can be formed in a curved shape toward the rear, and the left and right sides can be formed higher than the central part. According to this, the area where the user's thigh contacts is expanded, and the area that wraps inwardly around the buttocks and thighs is expanded, thereby improving the seating comfort.

[0048] Furthermore, the seat plate (110) may include a deformation portion (110a) and a contact portion (110b).

[0049] The deformation portion (110a) is formed such that elastic deformation occurs, and it can be formed in an upwardly curved shape so as to be spaced apart from the placement surface, and can be formed in the part where the buttocks come into contact. That is, the deformation portion (110a) can be formed at the rear, centered on a virtual reference plane that equally divides the front and rear between one end of the seat plate (110) and the contact portion (110b) described later. According to this, the user's load is applied most heavily to the deformation portion (110a), so the supporting force and contact force of the backrest (120) connected to the seat plate (110) can be maximized.

[0050] The contact portion (110b) is in contact with the placement surface and can be formed in a curved shape so as to face downward between the deformation portion (110a) and the backrest (120) described later, and can be formed such that the angle formed between the deformation portion (110a) and the backrest (120) with the contact portion (110b) at the center does not exceed 90°. Accordingly, a space for accommodating the user's buttocks is provided in front of the contact portion (110b), so that the user can sit stably and the seating comfort is improved.

[0051] In addition, a protrusion (P) may be formed on the contact portion (110b), which will be described later.

[0052] Meanwhile, an elastic deformation space (V) may be provided between the seat plate (110) and the placement surface.

[0053] The elastic deformation space (V) is a space in which the seat plate (110) can be elastically deformed in the direction of the placement surface when a user sits on it, and can be provided by forming the seat plate (110) and the contact portion (110b) in contact with the placement surface and the deformation portion (110a) spaced apart from the placement surface.

[0054] More specifically, the elastic deformation space (V) may include a first elastic deformation space (V1) formed in front of a virtual reference plane that equally divides the seat plate (110) into front and back, and a second elastic deformation space (V2) formed behind the reference plane. At this time, as described above, since the deformation part (110a) is formed behind the virtual reference plane that divides the space between one end of the seat plate (110) and the contact part (110b) into front and back, the volume of the second elastic deformation space (V2) may be larger than the volume of the first elastic deformation space (V1). According to this, the space in which the deformation part (110a), where the user's load is most heavily applied, can be elastically deformed may be formed to the greatest extent.

[0055] In addition, the elastic deformation space (V) can be formed by the tension projection (T) of the connecting part (211) described later, which will be described later.

[0056] In addition, a ventilation groove (A) may be provided in the central part of the seat plate (110).

[0057] The ventilation groove (A) is formed in the central part of the seat plate (110) through which air passes, and may have a shape of a roly-poly toy with two intersecting circles of different diameters. Accordingly, ventilation is improved, which has the effect of allowing the user to sit comfortably, and when the lumbar support chair (100) is not in use, there is an advantage that it can be mounted on a stand using the ventilation groove (A).

[0058] In addition, the seat plate (110) may be provided with a plurality of insertion grooves (H) into which a pressure point protrusion (140), described later, can be installed, and this will be described later.

[0059] The backrest (120) supports the lower back and is connected to the seat plate (110), and can be made of an elastic material. The elastic material includes, for example, synthetic resin, metal, wood, etc., but is not limited thereto, and any material that has elasticity is acceptable.

[0060] More specifically, the backrest (120) has an overall rectangular shape, but its width increases toward one end, and the ends on both sides of the first end may be formed in a curved shape. Additionally, the central part of the first end may be formed in a curved shape from the first end toward the other end, and the left and right sides may be formed to face forward more than the central part. According to this, the area where the user's back contacts is expanded, and the area that wraps around the back inward is enlarged, thereby improving the supporting force for the back.

[0061] In addition, a ventilation groove (A) may be provided in the central part of the backrest (120).

[0062] The ventilation groove (A) is formed in the central part of the backrest (120) through which air passes and may have a shape of a roly-poly toy with two intersecting circles of different diameters. Accordingly, ventilation is improved, which has the effect of allowing the user to sit comfortably, and when the lumbar support chair (100) is not in use, there is an advantage that it can be mounted on a stand using the ventilation groove (A).

[0063] Meanwhile, the backrest (120) may be provided with a plurality of insertion grooves (H) in which a pressure point protrusion (140), described later, can be installed, just like the seat plate (110), and this will be described later.

[0064] The reinforcing ribs (130) reinforce the elasticity of the seat plate (110) and may be formed in multiple numbers to protrude from the front and rear of the contact portion (110b), and may be made of an elastic material.

[0065] Materials having elasticity include, for example, synthetic resins, metals, wood, etc., but are not limited thereto, and any material having elasticity is acceptable.

[0066] When the reinforcing rib (130) is formed on the front surface, it is preferable that the reinforcing rib (130) be formed only on the contact portion (110b) to prevent foreign body sensation in the buttocks and back portions.

[0067] When reinforcing ribs (130) are formed on the rear side, they may be formed as a pair on the inner and outer sides, respectively, and to increase the support force of the back part, a pair of inner reinforcing ribs (130) may be formed extending to the central part of the backrest (120).

[0068] The acupressure protrusions (140) stimulate the thighs, buttocks, and back, and can be installed in each of the multiple insertion grooves (H) formed in the seat plate (110) and backrest (120).

[0069] The insertion groove (H) is installed with a pressure projection (140), and as shown in FIG. 8, it may have a circular first insertion part (H1) having a first inner diameter (I1) and a circular second insertion part (H2) having a second inner diameter (I2) that intersect each other, forming a tumbler shape. Additionally, an overlapping part (H3) having a third inner diameter (I3) may be formed at the intersection of the first insertion part (H1) and the second insertion part (H2).

[0070] More specifically, the first inner diameter (I1) may be formed to have a smaller inner diameter than the second inner diameter (I2), and the third inner diameter (I3) of the overlapping portion (H3) may be formed to be smaller than the first inner diameter (I1). According to this, when the pressure point protrusion (150) is installed in the insertion groove (H), the pressure point protrusion (150) is firmly installed in the insertion groove (H), so that the pressure point protrusion (150) is prevented from detaching from the insertion groove (H) even if the user moves. In addition, when the pressure point protrusion (150) is not installed, the ventilation is improved by the insertion groove (H), so that the user can sit comfortably.

[0071] As shown in FIG. 9, the pressure projection (140) includes a pressure portion (141), a first fixing portion (142), and a second fixing portion (143).

[0072] The pressure point (141) compresses the thigh, buttocks, and a part of the back. It has an overall triangular shape, with the upper part formed in a curved shape, and a grab groove (G) that penetrates the pressure point (141) from left to right can be formed on the side. According to this, the pressure point (141) can be easily grasped, so the pressure point projection (140) can be more easily installed in the insertion groove (H). In addition, if the pressure point (141) is made of an elastic material, the space provided by the grab groove (G) can be deformed according to pressure, thus having the effect of alleviating pain caused by excessive pressure.

[0073] The first fixing part (142) fixes the pressure projection (140) inserted into the insertion groove (H) in a horizontal direction and has a first outer diameter (O1) corresponding to the first inner diameter (I1), is inserted into the first insertion part (H1) through the second insertion part (H2), and can be formed on the lower surface of the pressure part (141). That is, the first outer diameter (O1) can be formed larger than the third inner diameter (I3) of the overlapping part (H3) where the first insertion part (H1) and the second insertion part (H2) intersect. According to this, it is possible to prevent the pressure projection (140) from moving away from the first insertion part (H1) toward the second insertion part (H2).

[0074] The second fixing part (143) fixes the pressure projection (140) inserted into the insertion groove (H) in a vertical direction and has a second outer diameter (O2) corresponding to a second inner diameter (I2), and can be formed on the lower surface of the first fixing part (142). That is, the second outer diameter (O2) can be formed larger than the first inner diameter (I1) of the first insertion part (H1) and the third inner diameter (I3) of the overlapping part (H3). According to this, the pressure projection (140) can be prevented from detaching from the second insertion part (H2) in an up-and-down direction.

[0075] The seat cover (150) is designed to distribute the user's weight and improve the seating sensation, and may be equipped with a cushion and formed to wrap around the seat (110).

[0076] More specifically, the seat cover (150) includes an upper portion and a lower portion, and each of the upper portion and the lower portion may have a shape corresponding to the shape of the seat (110), and one end may be open so that the seat (110) can be inserted. Additionally, a cushion may be provided on the upper portion of the seat cover (150).

[0077] The cushion may be made of materials such as cotton, memory foam, polyester, elastane, or a combination thereof, but is not limited to these, and any material capable of cushioning impact may be used.

[0078] Meanwhile, a fastening means such as a rubber band, Velcro tape, or button may be provided at one end of the seat cover (150). Accordingly, the connection between the seat cover (150) and the seat (110) is made secure, so that the seat cover (150) is prevented from separating from the seat (110) even when there is movement of the user.

[0079] The backrest cover (160) is designed to distribute the user's weight and improve the seating comfort, and may be equipped with a cushion and formed to wrap around the backrest (120).

[0080] More specifically, the backrest cover (160) includes a front portion and a rear portion, and each of the front portion and the rear portion may have a shape corresponding to the shape of the backrest (120), and one end may be open so that the backrest (120) can be inserted. Additionally, a cushion may be provided on the front portion of the backrest cover (160).

[0081] The cushion may be made of materials such as cotton, memory foam, polyester, elastane, or a combination thereof, but is not limited to these, and any material capable of cushioning impact may be used.

[0082] Meanwhile, a fastening means such as a rubber band, Velcro tape, or button may be provided at one end of the backrest cover (160). Accordingly, the connection between the backrest cover (160) and the backrest (120) is made secure, so that the backrest cover (160) is prevented from separating from the backrest (120) even when the user moves.

[0083] The elastic adjustment means (170) adjusts the strength of the contact force with which the backrest (120) is in contact with the lower back, and may include an elastic adjustment bolt (171) and an elastic adjustment nut (172), and may be installed on the contact part (110b) or the connecting part (211) described later.

[0084] Meanwhile, on one side of the aforementioned contact portion (110b), a pair of protrusions (P) formed to face inward may be formed on each of the left and right sides of the contact portion (110b), and each protrusion (P) may be provided with a through hole into which an elastic adjustment bolt (171) can be inserted.

[0085] The elastic adjustment bolt (171) is coupled with the elastic adjustment nut (172) described later and can be inserted into a pair of protrusions (P) in the direction of the backrest (120) from the positioning plane. Additionally, a thread may be formed at one end of the elastic adjustment bolt (171) so that the elastic adjustment nut (172) described later can be coupled thereto.

[0086] The elastic adjustment nut (172) is coupled to the elastic adjustment bolt (171), and a thread corresponding to the thread of the elastic adjustment bolt (171) may be formed on the inner surface of one end, and the outer diameter of the other end may be formed to have an outer diameter larger than the outer diameter of the first end. In addition, a plurality of curves may be formed on the outer surface of the other end so that the user can easily grip it.

[0087] According to the elastic adjustment means (170), when the user's upper body is tilted backward on the backrest (120), the contact portion (110b) is prevented from spreading excessively, thereby having the effect of making the backrest (120) firmer.

[0088] The leg joint (180) is where the chair legs are joined and can be formed in multiple numbers on the lower surface of the seat plate (110).

[0089] More specifically, as shown in FIG. 12, a pair of leg connecting parts (180) may be provided on the lower surface of one end and the lower surface of the other end of the seat plate (110), and an insertion space may be provided inside the leg connecting part (180) to which a chair leg can be connected.

[0090] When a separate chair leg is connected to the leg connecting part (180) for use, one pair of leg connecting parts (180) at either one end or the other end of the seat plate (110) may be fixed to the chair leg, and the other pair of leg connecting parts (180) at either the other end or the first end may be connected so as to slide on the chair leg. Accordingly, when a user sits on the seat plate (110), the leg connecting parts (180) at either the first or the other end of the pair slide on the chair leg, causing the deformation part (110a) to undergo elastic deformation, thereby having the effect of supporting the user's lower back and inducing a correct sitting posture.

[0091] According to the lumbar support chair (100) of the first embodiment of the present invention, which includes a seat plate (110), a backrest (120), a reinforcing rib (130), an acupressure protrusion (140), a seat plate cover (150), a backrest cover (160), an elastic adjustment means (170), and a leg joint (180) as described above, the backrest is in close contact with the lower back portion due to the user's weight, thereby firmly supporting the lower back and inducing sitting in a correct posture, which has the effect of improving lower back health and alleviating lower back pain. In addition, since the support force of the backrest increases or decreases in proportion to the user's weight, the lower back portion receives appropriate pressure that does not burden the lower back portion, thereby enabling personalized lower back support. Furthermore, the thigh and buttock portions are massaged by the acupressure protrusions provided on the seat plate, which has the effect of significantly improving blood circulation in the body. In addition, since it is equipped with a seat cover and backrest cover that include cushions, the user's weight is distributed, resulting in a significantly improved seating comfort.

[0092]

[0093] From now on, the operation (S100) of the waist support chair (100) according to the first embodiment of the present invention will be described in detail.

[0094] FIG. 19 is a flowchart of the operation (S100) of a waist support chair (100) according to the first embodiment of the present invention.

[0095] As illustrated in FIG. 19, the operation (S100) of the waist support chair (100) according to the first embodiment of the present invention includes a sitting step (S110), a deformation step (S120), and a contact step (S130).

[0096] The sitting step (S110) is a step in which a user sits on a lumbar support chair (100), and is performed by placing the user's buttocks and thighs on the seat plate (110).

[0097] The deformation step (S120) is a step in which the seat plate (110) is elastically deformed in the direction of the placement surface, and is carried out by the load of the user.

[0098] More specifically, one end of the seat plate (110) and the contact portion (110b) are in contact with the placement surface, and the deformation portion (110a) is spaced apart from the placement surface, so that an elastic deformation space (V) can be provided between the seat plate (110) and the placement surface. Since the seat plate (110) is made of an elastic material, when a user sits on the lumbar support chair (100), the deformation portion (110a) can be elastically deformed in the direction of the placement surface without being damaged by the user's load.

[0099] The close contact step (S130) is a step in which the backrest (120) is moved forward and comes into close contact with the user's back, and is performed by the seat plate (110).

[0100] More specifically, as the seat plate (110) is elastically deformed in the direction of the placement surface, the contact portion (110b) moves backward, and accordingly, the backrest (120) connected to the seat plate (110) moves forward so that it can be in close contact with the user's lower back.

[0101] According to the operation (S100) of the lumbar support chair (100) according to the first embodiment of the present invention, which includes a sitting step (S110), a deformation step (S120), and a contact step (S130) as described above, the backrest is in close contact with the lower back portion due to the user's weight, thereby firmly supporting the lower back and inducing a correct sitting posture, which promotes lower back health and alleviates lower back pain. In addition, since the support force of the backrest increases or decreases in proportion to the user's weight, the lower back portion receives appropriate pressure that does not burden it, thereby enabling personalized lower back support.

[0102]

[0103] Now, a waist support chair (200) according to the second embodiment of the present invention will be described in detail with reference to the attached drawings.

[0104] FIG. 13 is a perspective view of a lumbar support chair according to a second embodiment of the present invention, FIG. 14 is a front view of a lumbar support chair according to a second embodiment of the present invention, FIG. 15 is a top view of a lumbar support chair according to a second embodiment of the present invention, FIG. 16 is a side view of a lumbar support chair according to a second embodiment of the present invention, FIG. 17 illustrates that when a load is applied to a lumbar support chair according to a second embodiment of the present invention, the seat plate is elastically deformed and the backrest moves forward, FIG. 18 illustrates that the lumbar support chair according to a second embodiment of the present invention is adjusted.

[0105] As illustrated in FIGS. 13 to 18, a waist support chair (200) according to the second embodiment of the present invention includes a seat plate (210), a backrest (220), and an elastic adjustment means (170).

[0106] Meanwhile, among the components of the waist support chair (200) according to the second embodiment of the present invention, the elastic adjustment means (170) has the same configuration as the elastic adjustment means (170) of the waist support chair (100) according to the first embodiment of the present invention, so a redundant description is omitted.

[0107] The seat plate (210) accommodates the buttocks and thighs and can be placed on a placement surface and can be formed parallel to the placement surface.

[0108] Additionally, the seat plate (210) is connected to the backrest (220) described later and may be made of an elastic material. The elastic material includes, for example, synthetic resin, metal, wood, etc., but is not limited thereto, and any material that has elasticity may be used.

[0109] Additionally, the seat plate (210) may be provided with a connecting part (211) that connects the seat plate (210) and the backrest (220) described later.

[0110] The connecting part (211) can be formed curved so that the angle between the first end and the other end has an acute angle.

[0111] One end of the connecting part (211) is connected to the lower surface of the seat plate (210) by a hinge connection method, and the other end of the connecting part (211) may be provided with an installation groove (C) that extends along the length direction so that a backrest (220), which will be described later, can be connected by a screw connection method.

[0112] Additionally, a tension projection (T) made of an elastic material may be provided at one end of the connecting part (211). The elastic material includes, for example, synthetic resin, metal, wood, etc., but is not limited thereto and any material that has elasticity may be used.

[0113] More specifically, the tension projection (T) may be formed to extend from one end of the connecting part (211) toward the other end, and may be formed to protrude upward in a curved manner.

[0114] When a user sits on the seat (210), the tension protrusion (T) is elastically deformed by moving to the rear of the seat (210) while maintaining contact with the lower surface of the seat (210) due to the user's weight, and when the user stands up from the seat (210), the end moves from the rear of the seat (210) to the front due to the elastic restoring force, thereby pushing the other end of the seat (210) upward.

[0115] That is, the aforementioned elastic deformation space (V) can be formed by the seat plate (210) rising from the placement surface by the tension projection (T).

[0116] More specifically, the elastic deformation space (V) may include a first elastic deformation space (V1) formed in front of a reference plane and a second elastic deformation space (V2) formed behind a reference plane, centered on a virtual reference plane that equally divides the seat plate (210) into front and back. At this time, as described above, as the tension projection (T) pushes the other end of the seat plate (210) upward, the volume of the second elastic deformation space (V2) may be larger than the volume of the first elastic deformation space (V1). According to this, the space capable of elastic deformation can be formed most abundantly in the other end of the seat plate (210) where the user's load is applied most heavily.

[0117] Additionally, the connecting part (211) may be provided with an elastic adjustment means (170) for adjusting the strength of the contact force with which the backrest (220) is in close contact with the lower back.

[0118] Additionally, a pair of protrusions (P) formed to face inward may be formed on one side of the connecting part (211), and the protrusions (P) may be provided with a through hole into which an elastic adjustment bolt (171) can be inserted.

[0119] The backrest (220) supports the lower back and is connected to the seat plate (210), and can be made of an elastic material. The elastic material includes, for example, synthetic resin, metal, wood, etc., but is not limited thereto, and any material that has elasticity may be used.

[0120] The backrest (220) may more specifically include a pair of support plates (221) and a connecting part (222) that connects the pair of support plates (221).

[0121] A pair of support plates (221) have an overall elliptical shape, but are each provided with shapes symmetrical to each other, and one side of each is connected to a connecting part (222) described later.

[0122] The connecting part (222) is connected to the aforementioned connecting part (211), and is provided with a screw part (S) that penetrates the installation groove (C) of the connecting part (211).

[0123] A position adjustment nut (D) for adjusting the front and rear position of the backrest (220) may be installed in the screw portion (S) in a screw-coupling manner, and a position fixing nut (F) for fixing the height of the connecting portion (222) may be installed in a screw-coupling manner. At this time, the position adjustment nut (D) is installed to be positioned between the connecting portion (222) and the installation groove (C), and when rotated in one direction, it moves toward the connecting portion (222) to reduce the distance between the backrest (220) and the connecting portion (211), and when rotated in the other direction, it moves toward the connecting portion (211) to increase the distance between the backrest (220) and the connecting portion (211).

[0124] According to the second embodiment of the present invention, the lumbar support chair (200) comprising a seat plate (210), a backrest (220), and an elastic adjustment means (170) as described above, the backrest is in close contact with the lower back portion due to the user's weight, thereby firmly supporting the lower back and inducing a correct sitting posture, which promotes lower back health and alleviates lower back pain. In addition, since the support force of the backrest increases or decreases in proportion to the user's weight, the lower back portion receives appropriate pressure without causing a burden, thereby enabling personalized lower back support. Furthermore, the thigh and buttock portions are massaged by the acupressure protrusions provided on the seat plate, which has the effect of significantly improving blood circulation in the body. Additionally, since a seat cover and a backrest cover including a cushion are provided, the user's weight is distributed, which has the effect of significantly improving the seating comfort.

[0125]

[0126] From now on, the operation (S200) of the waist support chair (200) according to the second embodiment of the present invention will be described in detail.

[0127] FIG. 20 is a flowchart of the operation (S200) of a waist support chair (200) according to a second embodiment of the present invention.

[0128] As illustrated in FIG. 20, the operation (S200) of the waist support chair (200) according to the second embodiment of the present invention includes a sitting step (S210), a deformation step (S220), and a contact step (S230).

[0129] The sitting step (S210) is a step in which the user sits on the lumbar support chair (200), and is performed by placing the user's buttocks and thighs on the seat plate (210).

[0130] The deformation step (S220) is a step in which the seat plate (210) is elastically deformed in the direction of the placement surface, and is carried out by the load of the user.

[0131] More specifically, one end of the seat plate (210) and the connecting part (211) are in contact with the placement surface, and the other end of the seat plate (210) is separated from the placement surface by the tension projection (T) of the connecting part (211), so that an elastic deformation space (V) can be provided between the seat plate (210) and the placement surface. Since the tension projection (T) is made of an elastic material, when a user sits on the waist support chair (200), the tension projection (T) moves to the rear of the seat plate (210) by the user's weight and undergoes elastic deformation, and the other end of the seat plate (210) can be elastically deformed in the direction of the placement surface.

[0132] The close contact step (S230) is a step in which the backrest (220) is moved forward and comes into close contact with the user's back, and is performed by the seat plate (210).

[0133] More specifically, as the seat plate (210) is elastically deformed in the direction of the placement surface and the tension projection (T) moves to the rear of the seat plate (210) and is elastically deformed, the connecting part (211) moves to the rear and the backrest (220) connected to the connecting part (211) moves forward so that it can be closely attached to the user's lower back.

[0134] According to the operation (S200) of the lumbar support chair (200) according to the second embodiment of the present invention, which includes a sitting step (S210), a deformation step (S220), and a contact step (S230) as described above, the backrest is in close contact with the lower back portion due to the user's weight, thereby firmly supporting the lower back and inducing a correct sitting posture, which promotes lower back health and alleviates lower back pain. In addition, since the support force of the backrest increases or decreases in proportion to the user's weight, the lower back portion receives appropriate pressure that does not burden it, thereby enabling personalized lower back support.

[0135]

[0136] Although all components constituting an embodiment of the present invention have been described above as being combined or operating in combination, the present invention is not necessarily limited to such embodiments. That is, within the scope of the purpose of the present invention, all components may be selectively combined in one or more ways to operate.

[0137] Furthermore, terms such as "include," "compose," or "have" described above, unless specifically stated otherwise, mean that the relevant component may be inherent; therefore, they should be interpreted as allowing for the inclusion of additional components rather than excluding them. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as those defined in advance, should be interpreted in accordance with their meaning in the context of the relevant technology and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the present invention.

[0138] Furthermore, the above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention.

[0139] Accordingly, the embodiments disclosed in this invention are intended to illustrate, not limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments. The scope of protection of this invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of this invention.

Claims

1. A seat that accommodates the buttocks and thighs; and It includes a backrest connected to the above-mentioned seat plate and supporting the lower back, Between the above seat plate and the placement surface, An elastic deformation space is provided, A lumbar support chair characterized by the fact that when a user sits on it, the seat plate is elastically deformed in the direction of the positioning surface, thereby causing the backrest to come into close contact with the lower back.

2. In Claim 1, The above seat plate is, A deformation portion formed with an upward curve, and It includes a contact portion that contacts the placement surface, and The above elastic deformation space is, A lumbar support chair characterized by having one end of the seat plate and the contact portion in contact with a placement surface.

3. In Claim 1, The above elastic deformation space is, Centered on a virtual reference plane that equally divides the seat plate into front and back, it includes a first elastic deformation space provided in front of the reference plane and a second elastic deformation space provided behind the reference plane. The volume of the second elastic deformation space above is, A waist support chair characterized by being provided with a volume larger than that of the first elastic deformation space.

4. In Claim 1, The above seat plate and the above backrest, Multiple insertion grooves are formed, and In the plurality of the above insertion grooves, A lumbar support chair characterized by having acupressure bumps installed on each side.

5. In Claim 1, On the above seat plate, A connecting part connecting the seat plate and the backrest is provided, At one end of the above connecting part, A tension projection made of an elastic material is provided, and The above elastic deformation space is, A lumbar support chair characterized by being formed such that the seat plate is raised from the placement surface by the tension projection.

6. In Claim 5, In the above connection part, A lumbar support chair characterized by having an elastic adjustment means for adjusting the strength of the contact force with which the backrest is in close contact with the lower back.

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