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KR100708303B1 - Chair with adjustable back - Google Patents

Chair with adjustable back Download PDF

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Publication number
KR100708303B1
KR100708303B1 KR1020050043225A KR20050043225A KR100708303B1 KR 100708303 B1 KR100708303 B1 KR 100708303B1 KR 1020050043225 A KR1020050043225 A KR 1020050043225A KR 20050043225 A KR20050043225 A KR 20050043225A KR 100708303 B1 KR100708303 B1 KR 100708303B1
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KR
South Korea
Prior art keywords
support
chair
frame
support member
backrest
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Expired - Fee Related
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KR1020050043225A
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Korean (ko)
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KR20060120965A (en
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안기봉
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(주)체어텍
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Supports for the head or the back
    • A47C7/40Supports for the head or the back for the back
    • A47C7/402Supports for the head or the back for the back adjustable in height
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Supports for the head or the back
    • A47C7/40Supports for the head or the back for the back
    • A47C7/44Supports for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/441Supports for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Supports for the head or the back
    • A47C7/40Supports for the head or the back for the back
    • A47C7/44Supports for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445Supports for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs

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  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

본 발명은 가변등받이를 갖는 의자에 관한 것이다.The present invention relates to a chair having a variable back.

이는 특히, 소정의 탄성을 갖는 시트부재(330)가 프레임(310)에 연결되는 등받이(300);In particular, the backrest 300 is a seat member 330 having a predetermined elasticity is connected to the frame 310;

상기 프레임(310)에 양단이 볼트(410)로서 연결되면서 시트부재(330)와의 사이에 소정의 공간을 갖으면서 일정 강도를 유지하도록 호형상으로 형성되는 지지부재(400); 및,Support members 400 are formed in an arc shape so as to maintain a certain strength while having a predetermined space between the sheet member 330 and both ends connected to the frame 310 as a bolt 410; And,

상기 지지부재(400)에 거리조절수단(450)을 개재하여 연결되면서 지지부재(400)를 승,하강하는 승하강수단(470)이 구비되고, 사용자의 등형상과 일치토록 밀착면(430)이 구비되는 허리지지대(500)를 포함하는 구성으로 이루어 진다.The lifting member 470 is provided with a lifting means 470 that is connected to the support member 400 via a distance adjusting means 450 to move the support member 400 up and down, and is in close contact with the shape of the user. It is made of a configuration including a waist support 500 is provided.

이에 따라서, 높낮이 및 거리조절이 가능토록 되어 허리지지대를 사용자의 체형에 일치시킴으로써 장시간 사용시 사용자의 불편함을 최소화 함은 물론 허리통증을 최소화 하는 것이다.Accordingly, height and distance can be adjusted to match the waist support to the user's body shape to minimize user discomfort when using for a long time, as well as to minimize back pain.

허리지지대, 좌판부, 다리부, 밀착면, 지지부재 Lumbar support, seat plate, leg, contact surface, support member

Description

가변 등받이를 갖는 의자{a chair having the back of a chair with a variable}A chair having the back of a chair with a variable}

도1a는 종래의 요추지지 의자를 도시한 배면도.
도1b는 종래의 요추지지 의자의 지지대부분 요부 단면도
Figure 1a is a rear view showing a conventional lumbar support chair.
Figure 1b is a sectional view of the main portion of the support of the conventional lumbar support chair

도2는 본 발명에 따른 가변 등받이를 갖는 의자를 도시한 사시도2 is a perspective view of a chair having a variable back according to the present invention;

도3은 본 발명에 따른 지지부재의 등받이 연결상태를 도시한 분해도Figure 3 is an exploded view showing the backrest connection state of the support member according to the present invention

도4는 본 발명에 따른 지지부재의 등받이 연결상태를 도시한 결합단면도Figure 4 is a cross-sectional view showing a coupling state of the back of the support member according to the invention

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

111...캐스터 113...실린더111 ... Caster 113 ... Cylinder

200...좌판부 300...등받이200 ... seat section 300 ... backrest

310...프레임 330...시트부재310 ... Frame 330 ... Sheet member

400...지지부재 475...볼400 Support member 475 Ball

500...허리지지대500 ...

본 발명은 가변 등받이를 갖는 의자에 관한 것으로서 상세하게는, 소정의 탄성을 갖는 시트부재가 프레임에 연결되는 등받이와 상기 프레임에 양단이 연결되면 서 시트부재와의 사이에 소정의 공간을 갖으면서 일정 강도를 유지하도록 호형상으로 형성되는 지지부재 및 상기 지지부재에 거리조절수단및 승하강수단을 구비하는 구성으로 사용자의 허리부에 항상 밀착되는 상태로 장시간 사용에 따른 피로를 최소화 하도록 하는 가변 등받이를 갖는 의자에 관한 것이다.The present invention relates to a chair having a variable back, and in detail, a seat member having a predetermined elasticity is fixed while having a predetermined space between the backrest connected to the frame and the seat member while both ends are connected to the frame. The support member is formed in the shape of an arc to maintain the strength, and the support member is provided with a distance adjusting means and a lifting means to the variable backrest to minimize fatigue due to long-term use in close contact with the user's waist It relates to a chair having.

종래의 의자는 좌석부, 등받이부와 팔걸이부 등으로 구성되어지며, 좌석부 및 등받이부에는 착석자의 안락함을 증가시키기 위하여 쿠션이 설치되는 것이 통상적이다. Conventional chairs are composed of seats, backrests and armrests, and the seats and backrests are typically provided with cushions to increase the comfort of the seated occupants.

그러나, 의자에 앉아 사무를 보는 일이 많은 현대인들이 장시간 의자에 앉아 업무를 볼때 필연적으로 허리를 구부리게 되며, 상기와 같은 상태에서 장시간 업무를 보게 되므로 허리의 통증을 많이 호소하게 된다.However, many modern people sitting on a chair watching office work will inevitably bend the waist when sitting on a chair for a long time, and will see a lot of work in the above state, so will be a lot of back pain.

이것은 인간 척추의 하부가 아주 완만한 'C'자 형태를 취하기 때문이며, 상기의 구부린 자세와 같이 허리에 좋지 않은 자세로 장시간 있게 되면 척추 하부가 비교적 곧은 직선의 상태로 되면서 상체의 하중이 척추 전반에 골고루 분산되지 않고 상기 척추 하부에 집중되기 때문이다.This is because the lower part of the human spine has a very gentle 'C' shape. If the lower part of the spine is in a bad posture for a long time like the above bent position, the lower part of the spine becomes a relatively straight line and the upper body load is applied to the entire spine. This is because it is concentrated in the lower part of the spine without being evenly distributed.

이에 따라 종래 기술은 기본적인 구성에서 상기 등받이를 젖혀 지도록 하여 착석자가 허리를 펴기 편하도록 구성함으로써, 자세를 착석자 스스로 교정하도록 하거나, 또는 상기 등받이를 요추 지지가 되도록 볼록하게 형성 또는 쿠션을 장착하여 요추를 지지하도록 하고 있다.Accordingly, the prior art is configured to fold the backrest in a basic configuration so that the seated person is easy to straighten the waist, so that the seater himself or herself is corrected, or the backrest is convexly shaped or cushioned so as to support the lumbar spine. To support it.

그러나, 상기 등받이가 젖혀지는 의자는 착석자가 자각하지 않는 한 요통을 예방할 수 없으며, 요추를 지지하도록 형성된 의자는 요추지지부가 고정되어 있어 체형에 따른 요추지지부위 조절이 불가능하거나 요추지지부로서의 기능을 충분히 발휘할 수가 없었다.However, the chair on which the backrest is tilted can not prevent back pain unless the seated person is aware of it, and the chair formed to support the lumbar spine is fixed in the lumbar support so that it is impossible to control the lumbar support in accordance with the body shape or function as a lumbar support. I couldn't show it.

이러한 문제점을 해결하기 위한 것으로서 등록실용신안공보 제379971호에 요추지지 의자가 개시되어 있으며 그 구성은 도1a,b에서 도시한 바와같이, 등받이(10)에 천공부(11)가 형성되어 그 내측에 요추지지부(50)가 연결되는 지지대(20)가 삽입되며, 상기 지지대(20)는 삽입부(32)에 너트(34)를 갖는 회전손잡이(30)가 설치되어 요추지지대(50)에 형성되는 볼트부(41)와 치합되고, 상기 천공부에 형성되는 요철부(12)에 볼로서 탄성밀착되며, 상기 회전손잡이(30)는 돌기(33)로서 삽입공(25)에 고정되어 가이드레일(26)을 따라 전,후진 하는 구성으로 이루어 진다.In order to solve this problem, there is disclosed a lumbar support chair in Korean Utility Model Publication No. 379971. The configuration thereof is as shown in FIGS. 1A and 1B, and a perforated part 11 is formed in the backrest 10 to form an inner side thereof. The support 20 to which the lumbar support 50 is connected is inserted, and the support 20 is formed on the lumbar support 50 by a rotation knob 30 having a nut 34 in the insertion part 32. It is meshed with the bolt portion 41, the elastic portion is in close contact with the concave-convex portion 12 formed in the perforated portion, the rotary knob 30 is fixed to the insertion hole 25 as a projection 33 is guide rail It consists of a forward and backward configuration along (26).

상기와 같은 요추지지 의자는, 지지대(20)의 전방에 연결되는 요추지지부(50)가 회전손잡이(30)의 회전에 의해 전,후진 하며, 양측에 설치되는 볼에 의해 탄성지지되는 것이다.In the lumbar support chair as described above, the lumbar support part 50 connected to the front of the support 20 is moved forward and backward by the rotation of the rotary knob 30, and is elastically supported by balls installed at both sides.

그러나, 상기와 같은 요추지지 의자는, 상기 지지대(20)및 이에 연결되는 요추지지부(50)가 등받이(10)에 천공부(11)를 관통한후 형성하는 구성으로 의자 자체의 강도저하 문제가 따르게 되고, 요추지지부(50)가 등받이에만 연결되어 사용자의 하중에 의해 쉽게 파손될수 있는 등의 단점이 있는 것이다.However, in the lumbar support chair as described above, the support 20 and the lumbar support 50 connected thereto are formed after penetrating the perforation portion 11 to the backrest 10, thereby reducing the strength of the chair itself. Will follow, the lumbar support 50 is connected only to the backrest is a disadvantage that can be easily broken by the load of the user.

상기와 같은 문제점을 해결하기 위한 본 발명은 목적은, 착석자의 요추에 정확하게 지지되는 허리지지대를 통하여 요추의 휨들을 방지하도록 하고, 사용자가 항상 편안한 상태에서 작업할 수 있도록 하며, 등에서의 열발산을 원활함은 물론 마찰시 촉감을 높일수 있도록 하고, 결고한 지지가 가능하도록 하는 가변 등받이를 갖는 의자를 제공하는 데 있다.The present invention for solving the above problems is to prevent the bending of the lumbar spine through the lumbar support accurately supported on the lumbar spine of the occupant, so that the user can always work in a comfortable state, the heat dissipation in the back It is to provide a chair having a variable backrest to facilitate smoothness as well as to increase the feel at the time of friction, and to enable firm support.

본 발명은 상기 목적을 달성하기 위하여, 소정의 탄성을 갖는 시트부재가 프레임에 연결되는 등받이;The present invention, in order to achieve the above object, the seat back having a predetermined elasticity is connected to the frame back;

상기 프레임에 양단이 볼트로서 연결되면서 시트부재와의 사이에 소정의 공간을 갖으면서 일정 강도를 유지하도록 호형상으로 형성되는 지지부재;A support member formed in an arc shape so as to maintain a predetermined strength while having a predetermined space between the sheet member while both ends are connected as bolts to the frame;

상기 지지부재에 거리조절수단을 개재하여 연결되면서 지지부재를 승,하강하는 승하강수단이 구비되고, 사용자의 등형상과 일치토록 밀착면이 구비되는 허리지지대를 포함하는 구성으로 이루어 진 가변 등받이를 갖는 의자를 제공한다. The support member is provided with a lifting means for raising and lowering the support member while being connected via a distance adjusting means, and a variable backrest comprising a waist support having a close contact with the user's shape. To provide a chair.

이하, 첨부된 도면에 의거하여 본 발명의 실시예를 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도2 내지 도4에서 도시한 바와같이 본 발명은, 등받이(300)와 지지부재(400)및 허리지지대(500)를 포함하는 구성으로 이루어 진다.As shown in Figures 2 to 4, the present invention is made of a configuration including a backrest 300, the support member 400 and the waist support 500.

본 발명의 의자는, 이동가능하게 캐스터(111)가 연결되면서 실린더(113)에 의해 승하강하도록 하는 다리부(100)가 저면에 연결되는 좌판부(200)와 상기 좌판부(200)에 프레임(310)을 통하여 연결되는 등받이(300)로 이루어 진다.In the chair of the present invention, the caster 111 is movable so that the frame 100 is connected to the seat plate part 200 and the seat plate part 200 connected to the bottom of the leg part 100 to move up and down by the cylinder 113. It is made of a backrest 300 is connected through 310.

상기 등받이(300)는, 소정의 탄성을 갖는 시트부재(330)가 프레임(310)에 연결되고, 상기 시트부재(330)는 소정의 강도를 갖는 망상부재로 이루어 진다.The backrest 300 is a sheet member 330 having a predetermined elasticity is connected to the frame 310, the sheet member 330 is made of a reticular member having a predetermined strength.

상기 지지부재(400)는, 상기 프레임(310)에 양단이 볼트(410)로서 연결되면 서 시트부재(330)와의 사이에 소정의 공간을 갖으면서 일정 강도를 유지하도록 호형상으로 형성된다.The support member 400 is formed in an arc shape so as to maintain a predetermined strength while having a predetermined space between the frame member 310 and the sheet member 330 while both ends are connected as a bolt 410.

상기 허리지지대(500)는, 상기 지지부재(400)에 거리조절수단(450)을 개재하여 연결되면서 지지부재(400)를 승,하강하는 승하강수단(470)이 구비되고, 사용자의 등형상과 일치토록 밀착면(430)이 구비된다.The waist support 500 is provided with a lifting means 470 for lifting and lowering the support member 400 while being connected to the support member 400 via the distance adjusting means 450, the user's back shape. In close contact with the surface 430 is provided.

상기 거리조절수단(450)은, 지지부재가 삽입되는 요부(457a)가 상단에 형성되는 고정편(457)과 상기 고정편이 회전가능토록 연결되면서 내측에 나사산(453a)이 구비되는 구동부재(453)과 상기 구동부재에 나사결합되도록 나사산(451a)이 형성되는 종동부재(451)로서 이루어 진다.The distance adjusting means 450 is a driving member 453 which is provided with a screw 453a on the inside while the fixing piece 457 and the fixing piece are rotatably connected to each other so that the recess 457a into which the supporting member is inserted is rotatably formed. ) And a driven member 451 in which a screw thread 451a is formed to be screwed to the driving member.

상기 승하강수단(470)는, 상기 지지부재(400)의 요홀(410a)에 장착되면서 요철(473a)을 갖는 가이드홀(473c)이 형성되어 볼트(473b)로서 결합되는 작동판(473), 상기 종동부재(451)에 돌출되는 이송돌기(475b)와 스프링(475a)으로서 탄성연결되는 볼(475)로서 연결되는 지지판(471)로서 이루어 진다.The elevating means 470, the operating plate 473 is mounted to the concave hole (410a) of the support member 400 is formed with a guide hole (473c) having a concave-convex (473a), coupled to the bolt (473b), It consists of a support plate 471 connected as a ball 475 elastically connected as a feed projection 475b and a spring 475a protruding from the driven member 451.

상기와 같은 구성으로 이루어진 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention made of the above configuration as follows.

도2 내지 도4에서 도시한 바와같이, 본 발명에 의한 의자는 좌판부의 하부에 설치되는 실린더(113)의 조정에 의해 좌판부(200)의 높낮이가 조절됨은 물론 상기 다리부(100)에 설치되는 다수의 캐스터(111)를 통하여 원하는 방향으로 이동가능하게 된다.As shown in Figures 2 to 4, the chair according to the present invention, as well as the height of the seat plate 200 is adjusted by the adjustment of the cylinder 113 is installed in the lower portion of the seat plate portion is installed on the leg portion (100) Through a plurality of casters 111 to be moved in the desired direction.

그리고, 상기 좌판부(200)에 연결되는 등받이(300)는, 소정의 형상을 유지하도록 가장자리에만 위치하는 프레임(310)을 소정의 강도를 갖는 망상의 시트부재 (330)가 씌워지는 형상으로 사용자의 등에 시원한 느낌을 주게됨은 물론 프레임(310)에 의해 사용자의 하중을 지지토록 한다. In addition, the backrest 300 connected to the seat plate 200 has a shape in which a sheet member 330 having a predetermined strength covers a frame 310 positioned only at an edge so as to maintain a predetermined shape. In addition to giving a cool feeling to the back of the frame 310 to support the load of the user.

이때, 상기 프레임(310)의 높이방향 중앙부에는 호형상을 이루어 시트부재(330)와의 사이에 공간을 형성하도록 지지부재(400)가 볼트(410)로서 연결되어 그 공간에 허리지지대(500)의 연결이 가능토록 된다.At this time, the support member 400 is connected as a bolt 410 to form a space between the seat member 330 and the center portion in the height direction of the frame 310 in the arc shape of the waist support 500 The connection is made possible.

계속하여, 상기 허리지지대(500)는,소정의 인장력으로 프레임(310)에 지지되는 시트부재(330)에 의해 지지되는 사용자의 등에 하중이 실리게 되면 상기 시트부재(330)의 후방에 밀착되면서 인체공학적 형상으로 사용자의 요추부에 긴밀하게 밀착되는 밀착면(430)에 의해 허리부를 지지하여 장시간 사용시에도 불편함이 없게 한다.Subsequently, the waist support 500 is in close contact with the rear of the seat member 330 when a load is loaded on the back of a user supported by the seat member 330 supported by the frame 310 with a predetermined tensile force. An ergonomic shape supports the waist by the close contact surface 430 which is closely adhered to the lumbar region of the user so that there is no inconvenience even when used for a long time.

그리고, 사용자의 허리부에 긴밀하게 밀착되는 밀착면(430)을 갖는 허리지지대(500)는 그 일측에 지지부재(400)에 연결될 때 그 전방으로 전,후진 하거나 상,하 방향으로 이동할 수 있도록 된다.And, the waist support 500 having a close contact surface 430 is in close contact with the user's waist portion so as to be able to move forward or backward or move upward and downward when connected to the support member 400 on one side thereof. do.

상기 허리지지대(500)을 전,후및 상,하 방향으로 이동시키는 거리조절수단(450)및 승하강수단(470)의 동작은 손잡이의 역활을 하는 구동부재(453)및 지지부재(400)본체를 승하강시키는 동작에 의해 구동된다.The operation of the distance adjusting means 450 and the elevating means 470 for moving the waist support 500 in the front, rear, and up and down directions is performed by the driving member 453 and the supporting member 400 serving as a handle. It is driven by the operation of raising and lowering the main body.

먼저, 상기 거리조절수단(450)을 설명하면, 요부(457a)를 통하여 지지부재(400)의 중앙부에 연결되는 고정편(457)을 턱이나 베이링등을 통하여 구동부재(453)에 연결하여 구동부재(453)가 자유롭게 회전토록 하고, 이때 상기 구동부재(453)의 내주연에 형성되는 나사산(453a)이 종동부재(451)의 외주연에 형성되는 나 사산(451a)과 치합되어 구동부재의 회전시 종동부재가 전,후진하여 거리를 조절하게 된다.First, the distance adjusting means 450 is described, by connecting the fixing piece 457 connected to the central portion of the support member 400 through the recess 457a to the driving member 453 through a jaw or a bearing. The driving member 453 rotates freely, and at this time, the thread 453a formed at the inner circumference of the driving member 453 is engaged with the screw thread 451a formed at the outer circumference of the driven member 451. During the rotation of the driven member to move forward and backward to adjust the distance.

그리고, 상기 승하강수단(470)의 동작은, 상기 종동부재(451)의 일단에 돌출되는 이송돌기(475b)가 허리지지대(500)의 요홀(410a)에 고정되는 작동판(473)의 가이드홀(473c)을 관통하여 지지판(471)과 결합됨으로써 종동부재(451)가 허리지지대(500)에 하중이 작용하면 상기 허리지지대(500)가 종동부재(451)를 중심으로 승하강하게 된다.In addition, the operation of the lifting means 470, the guide of the operation plate 473 is fixed to the yaw hole 410a of the waist support 500, the transfer projection 475b protruding from one end of the driven member 451. When the driven member 451 is coupled to the support plate 471 through the hole 473c and a load acts on the waist support 500, the waist support 500 moves up and down about the driven member 451.

이때, 상기 종동부재(451)의 일측에 탄성연결되는 볼(475)이 작동판(473)에 형성되는 요철(473a)에 마찰되어 일정위치에서 위치결정되어 그 움직임이 방지토록 된다.At this time, the ball 475 elastically connected to one side of the driven member 451 is rubbed against the concave-convex 473a formed in the operating plate 473 is positioned at a predetermined position to prevent its movement.

이상과 같이 본 발명은 일정위치에 이동시 시트부재(330)에 작용하는 인장력과 종동부재(451)의 밀착력에 미끄럼이 방지토록 되고, 구동부재(453)의 회전에 의해 거리이동이 가능토록 되어 사용자의 요추부에 항상 일정하게 위치되어 요추를 지지함으로써 요추의 무리로 인한 변형등을 방지하도록 하는 것이다.As described above, the present invention prevents the sliding of the tensile force acting on the sheet member 330 and the adhesion of the driven member 451 when moving to a predetermined position, and enables the distance movement by the rotation of the driving member 453. The lumbar spine is constantly positioned so as to support the lumbar spine to prevent deformation due to the lumbar spine.

상술한 바와 같이 본 발명에 의하면, 착석자의 요추에 정확하게 지지되는 허리지지대를 통하여 요추의 휨을 방지하고, 사용자가 항상 편안한 상태에서 작업이 가능하며, 등에서의 열발산을 원활하게 함은 물론 마찰시 촉감을 높이고, 결고한 지지가 가능한 효과가 있는 것이다.As described above, according to the present invention, the lumbar spine is prevented through the lumbar support accurately supported on the lumbar spine of the occupant, and the user can work in a comfortable state at all times. To increase the solid support is possible.

본 발명은 특정한 실시예에 관련하여 도시하고 설명 하였지만, 이하의 특허 청구범위에 의해 제공되는 본 발명의 정신이나 분야를 벗어나지 않는 한도내에서 본 발명이 다양하게 개량 및 변화될수 있다는 것을 당업계에서 통상의 지식을 가진자는 용이하게 알수 있음을 밝혀 두고자 한다.While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit or scope of the invention as provided by the following claims. I would like to clarify that those who have knowledge of this can easily know.

Claims (4)

이동가능하게 캐스터(111)가 연결되면서 실린더(113)에 의해 승하강하도록 하는 다리부(100)가 저면에 연결되는 좌판부(200)와, 상기 좌판부(200)에 소성의 탄성을 갖는 시트부재(330)가 프레임(310)을 통하여 연결되는 등받이(300)와, 상기 프레임(310)에 양단이 연결되면서 시트부재(330)와 소정의 공간을 갖으면서 일정강도를 유지하도록 호형상으로 형성되는 지지부재(400)와, 상기 지지부재(400)에 거리조절수단(450)을 개재하여 연결되면서 지지부재(400)를 승하강하는 승하강수단(470)과, 사용자의 등형상과 일치토록 밀착면(430)이 구비되는 허리지지대(500)를 포함하는 구성으로 이루어진 가변 등받이를 갖는 의자에 있어서;The seat plate part 200 is connected to the bottom surface of the leg part 100 to move up and down by the cylinder 113 while the caster 111 is movably connected, and the seat plate 200 has a plastic elasticity. The member 330 is formed in an arc shape so as to maintain a predetermined strength while having a predetermined space with the seat member 330 while both ends are connected to the frame 310 and the frame 310 is connected to the frame 310. And a support member 400 which is connected to the support member 400 via a distance adjusting means 450 and the elevating means 470 which raises and lowers the support member 400, and matches the shape of the user. In the chair having a variable backrest made of a configuration comprising a waist support 500 provided with a close contact surface 430; 상기 거리조절수단(450)은, 지지부재가 삽입되는 요부(457a)가 상단에 형성되는 고정편(457)과, 상기 고정편이 회전가능토록 연결되면서 내측에 나사산(453a)이 구비되는 구동부재(453)와, 상기 구동부재에 나사결합되도록 나사산(451a)이 형성되는 종동부재(451)로 이루어지고,The distance adjusting means 450 is a fixing member 457 having a recess 457a into which the supporting member is inserted is formed at an upper end thereof, and a driving member having a thread 453a provided therein while the fixing piece is rotatably connected thereto. 453 and a driven member 451 which is formed with a screw thread 451a to be screwed to the driving member, 상기 승하강수단(470)은, 상기 지지부재(400)의 요홀(410a)에 장착되면서 수직방향에 가이드홀(473c)이 형성되는 작동판(473)과, 상기 종동부재(451)의 일단에 돌출되는 이송돌기(475b)에 결합되는 지지판(471)으로서 이루어지는 것을 특징으로 하는 가변 등받이를 갖는 의자.The elevating means 470 is mounted to the yaw hole 410a of the support member 400 and is provided with an operating plate 473 having a guide hole 473c formed in a vertical direction, and one end of the driven member 451. Chair having a variable backrest, characterized in that consisting of a support plate 471 coupled to the projecting projection (475b). 삭제delete 삭제delete 제1항에 있어서, 상기 승,하강수단(470)은, 상기 작동판(473)에 요철(473a)이 더 형성되며, 상기 작동판(473)에 밀착되는 종동부재(451)에 스프링(475a)으로서 탄성연결되는 볼(475)이 돌출설치되는 것을 특징으로 하는 가변 등받이를 갖는 의자.According to claim 1, The lifting means 470, Unevenness 473a is further formed on the operating plate 473, the spring 475a to the driven member 451 in close contact with the operating plate 473 A chair having a variable back, characterized in that the ball 475 is elastically connected as a protruding.
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