KR100844086B1 - A kneeling office chair - Google Patents

Abstract

A kneeling office chair is provided to sustain the weight of a user and to enable a user to sit in an optimal posture and at an optimal inclination to prevent the user from feeling uncomfortable even if he/she sits for a long time. A kneeling office chair includes a frame(10), a seat plate(15), a backplate unit(50), a lumbar support unit(40) and a couple of lever units(70). The seat plate is pivotally connected to the frame. The backplate unit is connected to the rear side of the frame. The lumbar support unit is connected to stand on the rear side of the seat plate, and is interlocked with the inclination operation of the seat plate separately from the backplate unit. The lever units are pivotally mounted on both sides of the frame. The lever unit is used as an armrest in a standing state and is used as a knee support in the state of being laid down.

Description

Office Knee Chair {A Kneeling Office Chair}

1 is a perspective view showing an office knee chair according to the present invention, showing a shape conversion process;

Figure 2 is an explanatory view showing a state in which the office knee chair according to the invention is used as a rest structure, a) is an exploded perspective view, b) is a state diagram used;

Figure 3 is a side view showing the inclination means provided in the office knee chair according to the present invention, a) is a state in which the seat plate is removed, b) is a state in which the seat plate is inclined;

Figure 4 is an external perspective view showing the inclination means provided in the office knee chair according to the present invention;

5 is a rear detailed view of the office knee chair according to the present invention;

Figure 6 is a detailed view of the guide groove and the key portion provided in the office knee chair according to the present invention;

7 is a side view of an office knee chair according to the present invention;

8 is an exploded perspective view showing the height adjustment structure of the head support means in the office knee chair according to the present invention;

9 is an exploded perspective view of the lever means provided in the office knee chair according to the present invention;

10 is a detailed view of the first rotating part provided in the office knee chair according to the present invention;

a) a first plate, b) a second plate, c) a third plate;

11 is an operating state diagram of the first rotating part provided in the office knee chair according to the present invention, a) when the third plate is disposed vertically, b) the case where the third plate is arranged horizontally;

12 is an exploded perspective view of the lever means provided in the office knee chair according to the present invention;

Figure 13 a) to d) is an explanatory view showing a structure in which the lever means provided in the office knee chair according to the present invention in order to adjust the length;

14 is an exploded perspective view of a second rotating part provided in the office knee chair according to the present invention;

15 is a perspective view showing a coupling structure of the second rotating part provided in the office knee chair according to the present invention;

16 is an external perspective view illustrating a state in which an office knee chair according to the present invention is arranged in a working structure;

17 is an external perspective view showing a state of use of the office knee chair according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1 ..... Office knee chair according to the present invention

5 ..... wheels 10 .... frames

15 .... seat 20 .... inclined means

22 .. Hinge Shaft 24 .... Hydraulic Spring

24a ... Load 26 .... Movement axis

26a ... key section 28 ..

32a, 32b ... flange 34 .... guide groove

34a ', 34a "... keyway 36 .... adjustment handle

40 .... Lumbar support means 42 .... double frame

44 ... bolt 50 ... backrest means

55 .... head support means 57 .... support frame

70 .... lever means 80 .... first rotating part

82 .... First Edition 82a .... Fixing Pins

84 .... Second Edition 84a .... Inclined Groove

84b ... The handle 86 .... 3rd edition

86a .... arc track 86b .... lock groove

90 ..... Fixed shaft 92a .... Fixed protrusion

92b .... Neck 92c .... Push Rod

94 .... spring 100 .... second turn

102 .... First Edition 102a .... Locking Pins

104a ... inclined groove 104b .... handle

106 ... Third Edition 106a ... Arc Track

106b .... Locking groove 110a, 110b ... support plate

d1 .... short diameter d2 .... long diameter

P ..... center axis P1, P2 .... distance

The present invention relates to an office chair, and more specifically, the user can rest in a comfortable posture on the back and armrests, as well as the body load by the user's ergonomically optimal posture and inclination through the shape change of the chair. The present invention relates to an office knee chair that is improved to prevent the neck, shoulder, and spine from bending forward even when sitting for a long time, thereby causing health disorders such as chest, low back pain and neck pain.

In general, office chairs are usually configured such that the backrest can be tilted with respect to the seat plate. In most office environments, workers perform a variety of tasks, such as writing at the desk, dictating, using the telephone, or typing on a computer. Most of these tasks are carried out over a long period of time, usually increasing fatigue for the worker. Therefore, after working for a certain time, the worker should rest against the back and armrests, which is a major cause of deterioration of work efficiency.

Such a conventional office chair, when the user sits and performs various tasks, the center of gravity of the user's upper body and the center line of the chair are changed, so that the user's posture becomes unstable. The center lines are aligned to give a sense of stability. However, when the user sits with the upper body leaned forward, the front of the user's spine is contracted, the back of the back tension is a major cause of disc and various spinal diseases. If you lean forward in this way, various organs, including the lungs, are depressed, which can affect oxygen intake, impaired blood circulation, chronic indigestion, muscle tension, fatigue accumulation, myopia risk and poor learning. will be.

Therefore, in order to solve this inconvenience, the user must sit firmly in the chair, which is impossible to sit on the chair for a long time only by the conscious effort of the user, and it is accompanied by various pains when sitting for a long time.

The present invention is to solve the conventional problems as described above, the purpose of the user sitting in a chair, even if sitting for a long time by allowing the user to sit while supporting the body load in the optimal posture and tilt ergonomically An object of the present invention is to provide an office knee chair which is not inconvenient and is improved to prevent various spinal diseases and diseases in advance.

And another object of the present invention is to always be able to sit in the chair in the correct posture to correct the posture, according to which the user's internal organs are not pressed down oxygen intake, blood circulation disorders, chronic indigestion, muscle tension, It is possible to prevent the accumulation of fatigue, myopia risk and poor learning in advance, and to provide an improved office knee chair so that the user can rest in a comfortable posture on the armrest and the back by changing the shape of the chair.

In order to achieve the above object, the present invention, in the chair that the user can sit,

frame;

A seat plate rotatably connected on the frame and on which the user can sit;

Backrest means connected upright to the rear side of the frame;

Lumbar support means connected to the rear side of the seat plate in an upright position and interlocking with the inclined operation of the seat plate separately from the backrest means; And

A pair of lever means rotatably mounted on both sides of the frame and used as an armrest in a standing state or as a knee support in a lying state, including a user sitting or leaning against the backrest means and the armrest; It provides an office knee chair characterized in that the load is supported on the knee support and the seat plate and configured to sit while supporting the waist through the lumbar support means.

And the present invention preferably provides the office knee chair, characterized in that the frame is movable by mounting a wheel on the bottom.

In another aspect, the present invention preferably has a hinge axis in which the front lower surface of the seat plate is rotatably coupled to the front upper surface, and further includes inclined means for simultaneously lifting the back plate and the lumbar support means by lifting the rear surface of the seat plate. It provides an office knee chair characterized in that.

The present invention preferably includes the hydraulic spring having one side fixed to the frame, and a moving shaft connected to the rod of the hydraulic spring to move forward and backward on the frame, and on the rear axis of the seat on the moving shaft. A pair of rotatably connected stators are rotatably connected, while the moving shaft is mounted to be movable or fixable in a guide groove of a flange protruding from the frame.

In addition, the present invention preferably the inclined means has an elliptical key groove formed of an enlarged diameter before and after the guide groove of the flange, and a long diameter of a size corresponding to the key groove, and at the same time corresponds to the size of the guide groove It is composed of a key portion of the elliptical cross section having a short diameter, the key portion is provided on both sides of the moving shaft, the end of the moving shaft provides an office knee chair, characterized in that the adjustment handle is formed.

And the present invention preferably provides the office knee chair, characterized in that the lumbar support means is a double frame coupled to the bolt coupling at the rear of the seat plate.

In addition, the present invention preferably the lever means includes a first rotating portion capable of tilting forward and backward of the seat plate relative to the frame, the first rotating portion protrudes from both sides of the frame and a plurality of movable in the left and right direction A first plate on which the fixing pins of the first plate are mounted, the second plate being coaxially disposed adjacent to the first plate, and the inclined grooves into which the fixing pins are fitted, respectively, the second plate having a handle protruding from one side thereof, A third plate disposed coaxially adjacent to the second plate, the third track having an arcuate track into which the fixing pins are fitted, and a locking groove formed at the end of the arcing track, wherein the third plate is inside the lever means. When the fixing pins positioned in the inclined groove through the handle of the second plate to be positioned on the arc-shaped track, the rotation of the lever means is allowed. High, and provides a knee office chairs, characterized in that is configured to secure the lever means when the fixed pins located on the inclined grooves so as to be located in the locking groove.

And the present invention preferably the lever means comprises a plurality of covers each of which is fixed to each other fixed to both sides of the third plate, the guide groove in which a plurality of locking grooves are arranged at regular intervals on the upper side of the third plate The guide groove provides an office knee chair, characterized in that the cover is configured to be able to adjust the length up and down on the third plate by being inserted into a fixed shaft that is accessible from the cover into the guide groove.

In another aspect, the present invention preferably provides the office knee chair, characterized in that the lever means further comprises a support plate rotatable on the inclined plane with respect to the lever means through the second rotating portion on the top.

The present invention preferably provides that the second rotating part is disposed coaxially adjacent to the first plate, the first plate having a plurality of fixing pins protruding from the upper end of the lever means and movable in the left and right directions. A second plate formed with inclined grooves into which fixing pins are fitted, respectively, and a second plate having a handle protruding from one side thereof, and an arc track disposed coaxially adjacent to the second plate and having the fixing pins fitted therein; And a third plate formed with locking grooves formed at an end of the third plate, wherein the third plate is fixed in the support plate such that the fixing pins positioned in the inclined grooves are located in the arc-shaped track through the handle of the second plate. Permitting the rotation of the support plate and allowing the fixing pins located in the inclined groove to be located in the lock groove, the support plate being configured to be fixed It provides an office knee chair characterized in that.

In another aspect, the present invention preferably provides an office knee chair characterized in that the backrest means is connected through one elastic frame from the frame.

And the present invention preferably the backrest means further comprises a head support means capable of adjusting the upper and lower positions to the upper side, the head support means is characterized in that the support frame is fixed to the bolt by being fitted to the elastic frame of the backrest means Provide an office knee chair.

In addition, the present invention preferably provides the office knee chair, characterized in that the inclined means is inclined to the front side by raising the back of the seat plate 15 degrees to 30 degrees.

And the present invention preferably provides an office knee chair characterized in that the seat plate is mounted on the front side separately from the lever means.

In another aspect, the present invention preferably provides the office knee chair, characterized in that the seat plate, lumbar support means and back support means are each removable from the frames so that the cloth can be changed.

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

The office knee chair 1 according to the present invention, as shown in Figure 1, the user can rest and rest against the backrest means 50 and armrests from the structure of the body load through the shape conversion from the knee rest and the seat plate It is possible to sit and work while supporting the (15) and firmly supporting the waist through the lumbar support means (40).

As shown in FIG. 2, the office knee chair 1 according to the present invention has a frame 10 having a structure movable by mounting a wheel 5 at a lower portion thereof.

The frame 10 is preferably made of a steel structure, the upper portion is connected to the seat plate 15 that can be seated rotatably.

As shown in FIG. 3, the frame 10 has a hinge shaft 22 to which the front lower surface of the seat plate 15 is rotatably coupled to the front upper surface, and lifts the rear surface of the seat plate 15. And inclination means 20 for rotating the seat plate 15 and the lumbar support means 40 simultaneously.

That is, the seat plate 15 is held horizontally on the frame 10 so that the user can sit on the backrest means 50 described later, while maintaining the inclined state toward the front side so that the user can rest on the knee support. It can be used to support body loads.

And the inclination means 20 for adjusting the inclination of the seat plate 15 on the frame 10 has a hydraulic spring 24 fixed to one side at the upper surface of the frame 10, as shown in FIG. do. The hydraulic spring 24 has a built-in hydraulic pressure therein, and the rod 24a can elastically enter and exit from the body portion.

The inclined means 20 also includes a moving shaft 26 which is connected to the rod 24a of the hydraulic spring 24 and is capable of moving forward and backward on the frame 10, and the seat plate 15 on the moving shaft 26. It is a structure in which a pair of fixing brackets 28 rotatably connected to the rear lower surface of the back panel are rotatably connected.

The moving shaft 26 is arranged in the horizontal direction from the top of the frame 10, the rod 24a is rotatably connected to the intermediate point. In addition, the pair of holders 28 are connected to the rear lower surface of the movable shaft 26 and the seat plate 15, the front end of each of the fixed bracket 28 is rotatable on both sides of the movable shaft 26, respectively The rear end of the holder 28 is rotatably fixed to the rear lower surface of the seat plate 15 as shown in FIG.

Therefore, the operation of the hydraulic spring 24 transmits the acting force to the rear of the seat plate 15 through the moving shaft 26 and the pair of fixing tables 28.

On the other hand, the moving shaft 26 is mounted to be movable or fixed through the inclined means 20 in the guide groove 34 of the flanges 32a and 32b protruding from the frame 10.

As shown in FIG. 6, the moving shaft fitted in the guide groove 34 and the guide groove 34 of each of the flanges 32a and 32b protruding upward from both sides of the frame 10. Key portion 26a.

That is, the inclined means 20 has elongated guide grooves 34 formed in the front and rear directions of the seat plate 15 at the flanges 32a and 32b, and the guide grooves 34 each have a diameter before and after them. The enlarged elliptical key grooves 34a 'and 34a "are provided.

In addition, the key portion 26a inserted into the guide groove 34 is formed at both ends of the moving shaft 26, and has a long diameter d2 of a size corresponding to the key grooves 34a 'and 34a ". And a short diameter d1 corresponding to the size of the guide groove 34 at the same time, and an adjustment handle 36 is formed at each end of the movement shaft 26 so that the movement shaft 26 is formed. Is rotated).

In this structure, as shown in FIG. 3A, the inclined means 20 has a guide groove (as shown by a solid line in FIG. 6) when the seat plate 15 is horizontally positioned on the frame 10. With the long diameter d2 portion of the key portion 26a positioned in the front side key groove 34a 'of 34, if the user turns the adjustment handle 36, the short diameter ( d1) the portion coincides with the guide groove 34, the moving shaft 26 is pushed along the guide groove 34 to the rear side key groove 34a " Is moved to the same position.

When moved in this way, the front end of the holder 28 connected to the moving shaft 26 is pushed to the rear side to lift the rear of the seat plate 15 to the upper side, as shown in Figure 3b, the seat plate 15 is Keep inclined to the front side.

In this state, when the user rotates the rear key groove 34a "of the guide groove 34 to match the long diameter d2 portion of the key portion 26a, the seat plate 15 is fixed in an inclined state. .

In this case, the inclination means 20 is a structure in which the rear surface of the seat plate 15 is preferably inclined to the front side by raising 15 to 30 degrees.

On the other hand, on the contrary, by turning the key portion 26a from the rear key groove 34a "of the guide groove 34 so that the short diameter d1 part coincides with the guide groove 34, the rear of the seat plate 15 is rotated. When pressed downward, the pressing force of the seat plate 15 pushes the moving shaft 26 toward the front side through the fixing stand 28, and the hydraulic spring 24 pushes the rod 24a toward the body side while storing the elastic force, and moves The axis 26 is moved from the rear to the front, as shown by dashed lines in FIG. 6.

Then, when the user rotates the adjustment handle 36 in such a state that the long diameter d2 of the key portion 26a is positioned at the front side key groove 34a 'of the guide groove 34, the moving shaft 26 ) Is not moved in the guide groove 34 and is fixed. In this case, as shown in FIG. 3A, the seat plate 15 is horizontally maintained on the frame 10.

In addition, the office knee chair 1 according to the present invention includes a backrest means 50 connected upright to the rear side of the frame 10.

As shown in FIG. 7, the backrest means 50 has a structure connected from the frame 10 through one elastic frame 10. The back support means 50 is made of a structure separate from the lumbar support means 40 described later, and is directly connected to the frame 10 through a bolt 52 or the like. In addition, the backrest means 50 is the elastic frame 10 is made of a single frame 10, so that the user can be easily elastically bent to feel the comfort when leaning to the backrest means 50, as shown in FIG. have.

However, unlike the backrest means 50, the lumbar support means 40 is composed of a double frame so that even if the backrest means 50 is elastically bent separately, it firmly supports the lumbar region of the user.

On the other hand, the present invention further includes a head support means 55, the back support means 50 is capable of adjusting the upper and lower positions to the upper side. As shown in FIG. 8, the head support means 55 has a structure in which the support frame 57 is fitted to the elastic frame 54 of the back support means 50 to be fixed by a bolt 59.

Through this structure, the user can adjust the height of the head support means 55, and can be conveniently used according to the body size.

And the present invention includes a lumbar support means (40) connected to the rear side of the seat plate (15) and interlocked with the inclined operation of the seat plate (15) separately from the backrest means (50).

The lumbar support means 40 has a structure in which a double frame 42 is coupled to a bolt 44 at the rear of the seat plate 15. This is made of a separate structure from the backrest means 50, as shown in Figure 5, is connected to the rear of the seat plate 15 via a bolt 44 or the like directly.

Therefore, unlike the backrest means 50, the lumbar support means 40 firmly supports the lumbar region of the user at the rear of the seat plate 15 without being bent separately even if the backrest means 50 is elastically bent.

In addition, the present invention includes a pair of lever means 70 is rotatably mounted on both sides of the frame 10, and used as an armrest in a standing state or as a knee support in a lying state.

As shown in FIG. 9, the lever means 70 includes a first rotating part 80 having a lower end thereof capable of tilting forward and backward of the seat plate 15 with respect to the frame 10. The first rotating part 80 includes a first plate 82 having a plurality of fixing pins 82a protruding from both sides of the frame 10 and movable in the left and right directions, and on the first plate 82. A second plate 84 disposed coaxially adjacent to each other to form inclined grooves 84a into which the fixing pins 82a are fitted, and a handle 84b protruding from one side thereof, and the second plate 84. And a third plate 86 disposed coaxially adjacent to.

As shown in FIG. 10A, the first plate 82 is fixed to the frame 10 and has grooves 82b extending in left and right directions on both sides of the central shaft P, respectively. 82b has a structure in which a plurality of fixing pins 82a movable therein are mounted. In addition, as shown in FIG. 10B, the second plate 84 is disposed coaxially adjacent to the first plate 82 and forms inclined grooves 84a to which the fixing pins 82a are fitted. As such, the inclined grooves 84a each have a different distance between their opposite ends about the central axis P thereof. That is, the inclined groove 84a has a distance P1 of one side edge portion from the central axis P longer than a distance P2 of the other side edge portion.

Therefore, as described above, when the second plate 84 is rotated, the fixing pins 82a fitted in the inclined grooves 84a are moved in the inclined grooves 84a and are pushed along the edges of the inclined grooves 84a. It moves left and right in the elongate groove 82b of the first plate 82. In addition, the second plate 84 has a structure in which the handle 84b protrudes to one side so that the user can rotate about the central axis P through the second plate 84.

Further, the third plate 86 disposed adjacent to the second plate 84 includes an arc track 86a into which the fixing pins 82a are fitted, as shown in FIG. 10C, and the arc track 86a. It is a structure formed with the locking groove (86b) formed at the end of the), it is a structure connected inside the lever means (70).

Accordingly, as shown in FIG. 11, the third plate 86 has the fixing pins 82a positioned in the inclined groove 84a through the rotation of the handle 84b of the second plate 84 so that the arc-shaped track ( When positioned at 86a, the third plate 86 is rotatable about its central axis P, allowing rotation of the lever means 70 connected to the third plate 86, and allowing the third plate 86 to rotate. When the fixing pins 82a are positioned in the locking groove 86b through the rotation of the handle 84b of the second plate 84, the third plate 86 cannot be rotated about its central axis P. It is in a state that the lever means 70 is fixed to prevent the rotation.

And the present invention has a structure formed so that the lever means 70 is adjustable in length along its longitudinal direction. To this end, the lever means 70 includes a plurality of cover (72a) (72b) each of which is constricted and fixed to each other on both sides of the third plate (86).

9, the lids 72a and 72b are disposed on both sides of the third plate 86, and these lids 72a and 72b are coupled to each other through a plurality of bolts 74. The third plate 86 is sandwiched therebetween, and is movable.

Meanwhile, in FIG. 12, only one cover 72a and 72b is illustrated for convenience of description. The lever means 70 is adjustable in length by using the third plate 86 and the cover (72a, 72b), a plurality of locking grooves (76a) at a predetermined interval on the upper side of the third plate (86) The guide groove 76 is arranged to form a guide groove 76, the fixed shaft 90, which can enter into the guide groove 76 is fitted so as to move.

That is, the plurality of locking grooves 76a each have an elliptical structure, and moving grooves 76b are formed between the locking grooves 76a to be connected to each other. The fixing shaft 90 has a fixing protrusion 92a corresponding to the size of the locking groove 76a, a neck portion 92b having a size corresponding to the moving groove 76b, and the neck portion 92b. A pressing rod 92c formed successively. Accordingly, the fixing shaft 90 forms an “I” shaped cross section in which the neck portion 92b has a smaller size than the fixing protrusion 92a and the pressing rod 92c.

In addition, the fixing shaft 90 is elastically supported by the spring 94 in the inner side of the cover (72a) is always configured to be directed toward the other cover (72b) side, the fixing projection (92a) of the locking groove (76a) The position of the cover 72a and 72b relative to the third plate 86 is prevented by being kept in any one position.

In this state, as shown by way of example in Figure 13a), the pressing rod (92c) is a state protruding to the outside of the other cover (72b), as shown in Figure 13b) the user pushes the pressing rod (92c) When pressed, the fixing protrusion 92a is pulled out of the locking groove 86b while pressing the spring 94, and the neck portion 92b coincides with the moving groove 76b so that the lids 72a and 72b are formed on the third plate 86. Is movable in the longitudinal direction of the In the state of being moved as in FIG. 13C), when the pressing state of the pressing rod 92c is released as in FIG. 13D, the fixing protrusion 92a is again locked by the restoring force of the spring 94. The cover 72a, 72b is fitted to the side and is fixed to the third plate 86 in position. Thus, the lever means 70 is configured such that the cover (72a, 72b) is adjustable in length up and down on the third plate (86).

In addition, the present invention further includes a pair of support plates 110a and 110b that the lever means 70 is rotatable on an inclined plane with respect to the lever means 70 via a second rotating part 100 at an upper end thereof. do.

The support plates 110a and 110b can be used by the user as an armrest when positioned on the upper side of the seat plate 15, and can be used as knee supports when located on the front lower side of the seat plate 15. . To this end, the support plates 110a and 110b have a rotatable structure with respect to the lever means 70.

As shown in FIGS. 14 and 15, the support plates 110a and 110b are rotatable with respect to the lever means 70 through the second rotating part 100, and the second rotating part 100 is A first plate 102 protruding from the upper end of the lever means 70 and equipped with a plurality of fixing pins 102a movable in the left and right directions, and disposed coaxially adjacent to the first plate 102, Formed inclined grooves (104a) to which the fixing pins (102a) are fitted, respectively, on one side is disposed coaxially adjacent to the second plate 104, protruding the handle 104b, and the second plate (104) And a third plate 106 formed with an arc track 106a into which the fixing pins 102a are fitted, and locking grooves 106b formed at the end of the arc track 106a.

In addition, the second rotating part 100 is shown as a structure assembled in FIG. Since the second rotating part 100 is basically the same as the structure of the first rotating part described with reference to FIGS. 10 and 11, and thus, a detailed description thereof will be omitted.

In addition, the third plate 106 is fixed to the bolts 112 in the supporting plates 110a and 110b to be positioned in the inclined groove 104a through the handle 104b of the second plate 104. Allowing the pins 102a to be positioned on the arc track 106a allows the support plates 110a and 110b to rotate, and the securing pins 102a located in the inclined grooves 104a are locked by the locking grooves 106b. When positioned in the), it is configured to fix the base plate (110a) (110b).

Through this structure, the support plates 110a and 110b are movable to be usable as arm rests or as knee rests.

On the other hand, in the above described knee support is made through the lever means 70, the present invention is not limited to this, it is a structure mounted on the front side of the seat plate 15 separately from the lever means 70 Can be.

In this case, the knee support may be made of a structure that can slide forward from the lower portion of the seat plate (15). In such a case, the seat plate 15 may be inclined through the inclination means 20, and a separate knee support may protrude forward of the seat plate 15 to support the user's body.

The office knee chair 1 according to the present invention configured as described above, as shown in Figure 1, the user rests the body load from the resting structure that the user can rest comfortably leaning against the backrest means 50 and the armrest Supporting the knee support and the seat plate 15, and through the lumbar support means (40) to support the waist while working structure that can sit and vice versa, or vice versa.

The user can lean comfortably using the elastic force of the backrest means 50 in the resting structure as shown in FIG. 2, and the support plates 110a and 110b are located on the upper side of the seat plate 15 as armrests. Can be used. In such a case, even when the user leans toward the backrest means 50, the lumbar support means 40 does not push back and firmly supports the lumbar part of the user. This is because the structure is attached to the seat plate 15 separately from the backrest means 50, and is connected to the seat plate 15 in a double frame 10 structure having a stronger elastic force. Therefore, when the user leans back to the backrest means 50, the user can maintain the upper body in a balanced posture by pushing the lumbar spine through the lumbar support means 40, by stimulating between the most fatigued pelvis and lumbar spine. Can relieve fatigue

In addition, the user may make a shape conversion from the resting structure to the working structure as shown in FIGS. 16 and 17.

In such a case, the operator operates the adjusting handle 36 of the inclined means 20 from the structure shown in FIG. 2 so that the short diameter d1 portion of the key portion 26a matches the guide groove 34. Under the action of the spring 24, the moving shaft 26 is pushed along the guide groove 34 to the rear side key groove 34a "to lift the rear of the seat plate 15 to the upper side, and the seat plate 15 to the front side. Keep inclined.

In this state, when the user rotates the rear key groove 34a "of the guide groove 34 to match the long diameter d2 portion of the key portion 26a, the seat plate 15 is fixed in an inclined state. .

When the seat plate 15 is inclined as described above, the lumbar support means 40 connected thereto is also inclined forward to closely contact the lumbar spine of the user as shown in FIG. 17.

The user rotates the lever means 70 to the front side of the seat plate 15. When the user rotates the handle 84b formed on the second plate 84 of the first rotating part 80, the third plate 86 The fixing pins 82a are positioned in the arced track 86a of the support plate, so that the lever means 70 can be rotated to the front lower side with respect to the seat plate 15, and in this state, the handles of the second plate 84 84b) When the fixing pins 82a are positioned in the locking groove 86b through rotation, the third plate 86 is fixed in the state below the seat plate 15.

In addition, the support plates 110a and 110b are rotated through the second rotating unit 100 so as to be disposed at the center side of both lever means 70 and used as a knee support.

In this case, the user rotates the handle 104b protruding from the second plate 104 of the second rotating part 100, and after the rotation has been made, the fixing pins 102a are rotated to the third plate 106. It is to fix the position of the support plate (110a) (110b) to be located in the locking groove (106b).

In this way, after converting the form into a working structure, as shown in Figure 17, the user supports the body load on the knee support and the seat plate 15 and while supporting the waist tightly through the lumbar support means (40) You can sit and work.

In addition, the shape conversion from the work structure to the rest structure can be easily achieved by the user through a process opposite to the above process.

Meanwhile, in the present invention, the seat plate 15, the lumbar support means 40, and the back support means 50 are detachable from the frame 10, the double frame 42 and the elastic frame 54, respectively, so as to change the cloth if necessary. Can be made conveniently.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such a specific structure. Those skilled in the art may variously modify or change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. For example, the angle of inclination of the seat plate, the material of various parts, or a simple structural shape may be specifically limited or changed, but the present invention is not limited to any particular angle, material, or shape. And such modifications or variations are intended to be clear in advance that all clearly fall within the scope of the invention.

According to the present invention as described above, when the user is sitting in a chair, the user can sit while supporting the body load in an ergonomically optimal posture and inclination, so that it is not inconvenient to sit for a long time, and in advance various spinal diseases and diseases It has an improved effect to prevent it.

And according to the present invention, the user can always sit in a chair in the correct posture to correct the posture, the user's internal organs are not pressed while sitting, oxygen intake reduction, blood circulation disorder, chronic indigestion, muscle tension , Fatigue accumulation, myopia risk and poor learning can be prevented.

In addition, the user can relax by leaning on the armrest and backrest through the shape change of the chair, and even when leaning to the backrest, the lumbar support is firmly supported by the lumbar support means, so that the user can maintain the upper body in a balanced posture. And by stimulating between the most fatigued pelvis and lumbar spine can be obtained an excellent effect to ease the fatigue easily.

Claims (15)

In the chair where the user can sit, frame; A seat plate rotatably connected on the frame and on which the user can sit; Backrest means connected upright to the rear side of the frame; Lumbar support means connected to the rear side of the seat plate in an upright position and interlocking with the inclined operation of the seat plate separately from the backrest means; A pair of lever means rotatably mounted on both sides of the frame and used as an armrest in a standing state or as a knee support in a lying state, including a user sitting or leaning against the backrest means and the armrest; An office knee chair configured to support a load on the knee support and the seat plate and to sit while supporting the waist through the lumbar support means. The office knee chair according to claim 1, wherein the frame is movable by mounting a wheel at the bottom of the frame. The frame according to claim 1, wherein the frame has a hinge axis to which the front lower surface of the seat plate is rotatably coupled to the front upper surface, and further includes inclined means for lifting the rear surface of the seat plate to simultaneously rotate the seat plate and the lumbar support means. Office knee chair, characterized in that. According to claim 3, The inclined means comprises a hydraulic spring fixed to one side to the frame, and a moving shaft connected to the rod of the hydraulic spring is capable of moving forward and backward on the frame, and rotates on the rear lower surface of the seat plate on the moving shaft And a pair of fasteners connected to each other so as to be rotatable, while the moving shaft is mounted to be movable or fixed within the guide groove of the flange protruding from the frame. 5. The method of claim 4, wherein the inclined means has an elliptical key groove having an enlarged diameter before and after the guide groove of the flange, and a long diameter of a size corresponding to the key groove, and at the same time short of the size of the guide groove. An elliptical cross section formed of a key portion having a diameter, wherein the key portions are respectively formed on both sides of the moving shaft, the end of the moving shaft characterized in that the adjustment handle is formed on the end. According to claim 1, The lumbar support means is an office knee chair, characterized in that the double frame is coupled to the bolt coupling at the rear of the seat plate. According to claim 1, wherein the lever means has a lower end includes a first rotating part capable of tilting forward and backward of the seat plate relative to the frame, the first rotating part is a plurality of protruding from both sides of the frame and movable in the left and right direction A first plate on which fixing pins are mounted, a second plate coaxially disposed adjacent to the first plate, and inclined grooves into which the fixing pins are fitted, respectively, and a handle protruding from one side thereof, and the second plate. A third plate disposed coaxially adjacent to the plate, the arc track being fitted with the fixing pins respectively, and a third plate having locking grooves formed at the ends of the arc track, wherein the third plate is fixed inside the lever means. When the fixing pins located in the inclined groove through the handle of the second plate to be located in the arc-shaped track, allowing the lever means to rotate, If the fixed pins located in the groove so as to be located in the locking groove, office chairs, characterized in that the lap is configured to secure the lever means. The guide groove of claim 7, wherein the lever means includes a plurality of covers each of which is secured by being fixed to each other on both sides of the third plate, and a plurality of locking grooves are arranged at regular intervals on the upper side of the third plate. And a guide shaft into which the guide shaft enters from the cover is moved to the guide groove so that the cover can be adjusted up and down length on the third plate. The office knee chair according to claim 1, wherein the lever means further includes support plates rotatable on an inclined plane with respect to the lever means through a second rotating portion at an upper end thereof. 10. The method of claim 9, wherein the second rotating portion is a first plate protruding from the upper end of the lever means and equipped with a plurality of fixing pins movable in the left and right direction, disposed coaxially adjacent to the first plate, the fixed Pins are formed to form inclined grooves, respectively, a second plate with a handle protruding on one side, an arc-shaped track disposed coaxially adjacent to the second plate, the fixing pins are fitted, and the arc of the arc track And a third plate having lock grooves formed at an end thereof, wherein the third plate is fixed in the support plate such that the fixing pins positioned in the inclined grooves are located in the arc-shaped track through the handle of the second plate. Allowing the rotation of the backing plate, and if the fixing pins positioned in the inclined groove is located in the locking groove, characterized in that configured to fix the backing plate Office knee chair. The office knee chair as claimed in claim 1 wherein said backrest means is connected through said one elastic frame from said frame. The method of claim 11, wherein the backrest means further comprises a head support means capable of adjusting the upper and lower positions to the upper side, the head support means characterized in that the support frame is bolted to the elastic frame of the backrest means Office knee chair. The office knee chair according to any one of claims 3 to 5, wherein the inclining means inclines the rear side of the seat plate by 15 to 30 degrees to incline the front side. According to claim 1, The knee support is an office knee chair, characterized in that the seat plate is mounted on the front side separately from the lever means. The office knee chair according to claim 1, wherein the seat plate, lumbar support means and back support means are respectively removable from the frames so that the cloth can be changed.

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