KR102206733B1 - Chair lumbar support device capable of three-dimensional position adjustment - Google Patents

Abstract

The present invention relates to a lumbar support device for a chair in which a moving frame in close contact with a user's lumbar portion is moved up and down, as well as three-dimensionally moved forward and backward, and can be adjusted in position. Specifically, it can be easily installed on various types of chairs, and It is possible to easily and precisely adjust the installation height and protrusion of the frame, and at the same time, the adjusted state is maintained stably without deformation, and it is accurately positioned in the lumbar region of the chair user to support the lumbar and waist to provide maximum comfort and comfort to the user. It relates to a lumbar support device for a chair capable of three-dimensional position adjustment in an improved form.

Description

Chair lumbar support device capable of three-dimensional position adjustment}

The present invention relates to a lumbar support device for a chair in which a moving frame in close contact with a user's lumbar portion is moved up and down, as well as three-dimensionally moved forward and backward, and can be adjusted in position. Specifically, it can be easily installed on various types of chairs, and It is possible to easily and precisely adjust the installation height and protrusion of the frame, and at the same time, the adjusted state is maintained stably without deformation, and it is accurately positioned in the lumbar region of the chair user to support the lumbar and waist to provide maximum comfort and comfort to the user. It relates to a lumbar support device for a chair capable of three-dimensional position adjustment in an improved form.

In general, a chair is composed of a seat portion, a backrest portion, and an armrest portion, and a cushion is installed in the seat portion and the backrest portion to increase the comfort of the seated person.

However, many modern people who sit in a chair and do office work inevitably bend their backs when they sit in a chair for a long time and work for a long time in this state, resulting in pain due to concentrated fatigue in the lower back. This is because the lower spine becomes a relatively straight straight state when it is in a position with the back bent for a long time, and the load on the upper body is concentrated in the lower spine rather than evenly distributed over the entire spine.

Accordingly, in the prior art, in order to prevent back pain, a cushion or cushion was purchased separately and then a cushion or a small cushion was placed on the waist to support the waist, but these cushions or cushions are not fixed to the chair. Since a certain angle cannot be maintained, there is a problem in that the waist cannot be properly supported according to the user's movement.

In order to solve the above problems, recently, a chair with a lumbar support device installed in close contact with the user's lumbar and waist portions has been provided.

As an embodiment of the lumbar support device installed on the chair as described above, patent registration No. 10-1608737 (Registration date: March 29, 2016) The lumbar support device and the backrest unit of the chair having the same include a communication hole. Formed support frame; Lumbar support pad; And a forward/reverse control part for adjusting a degree to which the lumbar support pad moves back and forth in a lumbar direction with respect to the support frame through the communication hole, and the forward/reverse control part protrudes from the lumbar support pad toward the support frame. Sleeve; A handle having a screw inserted into the communication hole at one side of the support frame and screwed to the sleeve positioned at the other side to adjust the forward and backward movement of the lumbar support pad; A connector for maintaining a minimum distance between the support frame and the lumbar support pad in order to allow deformation of the lumbar support pad by shaft-inserting the sleeve and contacting the other side of the support frame; And a casing contacting the support frame so as to prevent interference of rotation as the handle contacts the support frame and fix the position, wherein the connector passes through an open hole to connect the casing through the communication hole. ; The casing is formed by extending an elastic locking member, the elastic locking member is inserted into the communication hole and then inserted into the open hole to be engaged to closely contact and bind the connector to the casing, and when the handle is rotated, the casing is It is characterized in that it prevents rotation.

As another prior art, Patent Registration No. 10-1101872 (Registration Date: December 27, 2011) The lumbar support device of the chair includes a fixing frame formed on a backrest frame, and provided on the fixing frame to support the waist and lumbar vertebrae. It includes a support pad and a height adjustment unit that moves the support pad up and down in the lumbar direction and adjusts the height, wherein the support pad includes a guide surface member that is guided upward and downward in contact with the fixing frame, and from both sides of the guide surface member in a waist direction. An extension member that extends and is formed to be bent in opposite directions, a support plate member formed in a plate shape at each end of the extension member to support the waist on both sides of the lumbar spine, and a band shape to connect and restrain the support plate member A restraining band member formed as, and a reinforcing member is provided between the fixing frame and the support pad, and the reinforcing member has roller members on both sides with respect to the elevating direction; The fixing frame is characterized in that to form an unevenness guiding the roller member for forcibly elevating the reinforcing member.

However, as described above, the lumbar support device for protecting the user's lumbar portion is positioned inside the backrest, and a back cushion member such as a mesh is formed on the outside, so that the lumbar support device cannot be in close contact with the user's lumbar or waist portion. There is a problem that it is not possible to substantially protect the user's lumbar and lower back, and in particular, the lumbar support device cannot firmly support the lower or lower back due to the back cushion member, which causes pain in the lower back and lumbar vertebrae when sitting for a long time. Continued.

Moreover, the lumbar support device is configured in a form that can be adjusted so that the lumbar support device can be positioned on the user's waist by adjusting the height of the lumbar support device, but as described above, the support force of the lumbar support device is reduced by the back cushion member. There is a problem in that the efficiency of the key device is remarkably lowered due to the deterioration.

Registered Patent Publication No. 10-1608737 (Registration date: March 29, 2016) "Lummbar support device and backrest unit of a chair having the same" Registered Patent Publication No. 10-1101872 (Registration date: December 27, 2011) "Lumbar support device of chair" Registered Patent Publication No. 10-1188881 (Registration date: September 28, 2012) "Lumbar support device of chair"

The present invention has been made in consideration of the above circumstances, and the object of the present invention is

By providing a lumbar support device for a chair that has a structure that can additionally install a lumbar support device on the back of the chair, it can be easily installed even in a chair without an existing lumbar support device, giving a new chair the functionality to protect the user's lumbar spine. It is to provide a lumbar support device for a chair capable of three-dimensional position adjustment in an improved form that can provide functionality without the purchase of.

Another object of the present invention is that the height and depth of the lumbar support device can be adjusted to suit various body sizes, so that the user's lumbar portion, the sacrum between 3-4-5, can be pushed deeply and strongly to the chair for a long time. It is to provide a lumbar support device for a chair capable of three-dimensional position control in an improved form that can prevent the occurrence of pain by remarkably reducing fatigue in the lumbar region even when seated.

It is an object of the present invention as described above, in a lumbar support device for a chair that is installed so as to buffer a user's lumbar or lower back on a back frame of a chair, wherein the lumbar support device for a chair is fixed to the chair back frame, and It has a lower light shape and is connected to the backrest frame of the chair on both sides of the lower side, and is composed of a coupling part with a plurality of screw fastening holes, a pair of locking parts formed of a plurality of hills and valleys inside, and a support plate receiving part with fastening holes at the top and bottom. And, a fixed frame consisting of a support plate screwed with bolts in a state in which the protruding holes formed in the upper and lower portions are in close contact with the fastening holes, and are positioned in the vertical direction from the fixed frame. A housing is formed with a through hole through which the bolt penetrates in the center part, a cushion part on one side, and a rotation range adjustment part at the edge spaced apart from the connection hole at the center part of the back side, and inside the space between the connection hole and the housing. On both sides of the support plate so that the connecting portion is integrally formed with a height adjustment unit consisting of a plurality of stepped jaws and fixed grooves, and is installed between the fixed frame and the moving frame so that the position of the moving frame can be adjusted in the vertical and forward direction. It is connected in a vertically movable form and has locking protrusions that are elastically caught in the locking portions on both sides of the base, and the assembly rod is formed with a spring inserted in the outer circumferential surface of the assembly rod inserted into the connection hole on one side and the assembly A chair capable of three-dimensional position adjustment, characterized in that it comprises an adjustment means consisting of a protruding adjustment member having a handle on the outside and a protrusion adjustment member coupled to the height adjustment unit on the other end and a handle on the outside and in close contact with one side of the height adjustment member. For lumbar support can be achieved.

The adjusting means is connected to the support plate in a form that can move up and down, and a plate-shaped base having a circular or angular shape, an assembly rod formed at a central portion of one surface of the base and having a spring fitted on the outer circumferential surface, and surrounding both sides of the support plate at the edge. A height adjustment member consisting of a pair of guiders consisting of a guide groove on the inside and a locking projection receiving groove with an elastic spring on the outside and a locking projection installed in a form movable back and forth in the locking projection receiving groove, and a cylindrical body It includes a hole through which the assembly rod passes on one side and a protruding adjustment member that is fitted inside the housing on the other side and has a plurality of peaks and valleys formed in a cross section, and a handle for rotating the body integrally formed on the outer circumferential surface, wherein, the guide While the groove is connected to both sides of the support plate, the moving position is fixed by locking the locking protrusion at the same time as the locking part, and the handle rotates within the movement range of the rotation range adjusting part of the moving frame and protrudes the moving frame forward. Or it is characterized by being recessed backwards.

It characterized in that it further comprises a cushion portion in close contact with the user's lumbar or waist in the front of the moving frame.

A plurality of long grooves are formed on one surface of the support plate at regular intervals, and a protrusion is included on one surface of the base of the height adjustment member, wherein the position of the height adjustment member is auxiliaryly fixed through the configuration of the long groove and the projection. .

The lumbar support device for a chair capable of three-dimensional position adjustment according to the present invention, unlike the prior art, is made so that the moving frame supporting the lumbar and lower back is moved in an up-down direction as well as in an anteroposterior direction so that the position can be adjusted according to the user's body size. As the lumbar part is kept tightly supported by the proper height and anterior protrusion, it is possible to support the user's waist (lumbar) more comfortably and comfortably even if the user sits on a chair for a long time. There is an effect that can help the user's back health by preventing back pain.

Moreover, the lumbar support device for a chair capable of three-dimensional position adjustment according to the present invention has a structure in which the fixing frame can be easily fastened to the chair back frame with bolts, so that it can be easily installed on the backrest chair of a general configuration, so it has excellent supply power and is easy to install. As it is simple, there is an effect that general users can easily install it without the need for a technician for installation.

In addition, the front of the moving frame has the effect of providing a more comfortable sitting posture to the user by forming a cushion part to improve adhesion to the user's lumbar region.

1 is a perspective view of a lumbar support device for a chair capable of three-dimensional position adjustment according to a first embodiment of the present invention
2 is an exploded perspective view of a lumbar support device for a chair capable of three-dimensional position adjustment according to a first embodiment of the present invention
3 is an exploded perspective view of an adjustment means part of a lumbar support device for a chair capable of three-dimensional position adjustment according to a first embodiment of the present invention
4 is a front view of a fixed frame among a lumbar support device for a chair capable of three-dimensional position adjustment according to a first embodiment of the present invention
5 is a cross-sectional view taken along line AA of FIG. 4
6 is a view showing the appearance of the adjustment means in the lumbar support device for a chair capable of three-dimensional position adjustment according to the first embodiment of the present invention
Figure 7 is a cross-sectional view of a combined state of the lumbar support device for a chair capable of three-dimensional position adjustment according to the first embodiment of the present invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the embodiments of the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text.

That is, since the embodiments can be modified in various ways and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only those effects, the scope of the present invention should not be understood as being limited thereto.

Meanwhile, the meanings of terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms.

For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component.

When a component is referred to as being "connected" to another component, it should be understood that it may be directly connected to the other component, but other components may exist in the middle. On the other hand, when it is mentioned that a component is "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between the constituent elements, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to specified features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in a commonly used dictionary should be interpreted as having the meaning of the related technology in context, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Now, a lumbar support device for a chair capable of three-dimensional position adjustment according to a first embodiment of the present invention will be described in detail with reference to the drawings.

In the accompanying drawings, FIG. 1 is a perspective view of a chair lumbar support device capable of three-dimensional position adjustment according to a first embodiment of the present invention, and FIG. 2 is a three-dimensional position adjustment device for a chair according to a first embodiment of the present invention. 3 is an exploded perspective view of the adjusting means part of the lumbar support device for a chair capable of three-dimensional position adjustment according to the first embodiment of the present invention, and FIG. 4 is an exploded perspective view of the support device according to the first embodiment of the present invention. A front view of a fixed frame among lumbar support devices for a chair capable of three-dimensional position adjustment, FIG. 5 is a cross-sectional view taken along line AA of FIG. 4, and FIG. 6 is a lumbar support device for a chair capable of three-dimensional position adjustment according to the first embodiment of the present invention. It is a view showing the outer shape of the adjustment means, Figure 7 is a cross-sectional view of the combined state of the lumbar support device for a chair capable of three-dimensional position adjustment according to the first embodiment of the present invention.

As shown, the lumbar support device for a chair capable of three-dimensional position adjustment according to the present invention (A) is largely fixed to the chair back frame (not shown) and a fixed frame 100, the front portion of the fixed frame 100 The moving frame 200 that is protruding and supported by being in close contact with the user's lumbar or waist portion, and the fixed frame 100 and the moving frame 200 are connected, and the moving frame 200 is connected in the up/down direction and the front/rear direction It consists of an adjustment means 300 to move.

The fixing frame 100 has an upper narrow light shape and is in close contact with the backrest frame (not shown) of the chair on both sides of the lower side, and the coupling portion 110 having a plurality of screw fastening holes 111 formed thereon and a plurality of mountains in the inner central portion A pair of locking portions 123 formed of 121 and the valley 122 and a support plate receiving portion 120 having fastening holes 124 formed at the upper and lower portions thereof are integrally formed.

In addition, the support plate 130 is in close contact with the support plate receiving part 120 at regular intervals, and the protruding holes 131 formed in the upper and lower portions are screwed with a bolt 140 in a state in close contact with the fastening hole 24. It is fixedly installed on the fixed frame 100.

In addition, a plurality of long grooves 132 are formed on one surface of the support plate 130 at regular intervals, so that the adjusting means 300 is locked thereafter so that the position of the adjusting means 300 is auxiliaryly fixed.

The movable frame 200 is assembled in a form that can be moved in the vertical direction by the fixing frame 100 and the adjusting means 300, and the through hole 210 through which the bolt 400 passes through the central part and a cushion on one side The connecting portion 230 is integrally formed on the portion 220 and the rear surface.

In addition, the connection part 230 is formed with a housing 233 having an oval-shaped connection hole 231 in the center portion and a rotation range adjustment part 232 consisting of a range of 150 degrees to 180 degrees with an edge spaced apart from each other at a predetermined distance. A height adjustment part 236 made of a plurality of stepped jaws 234 and a fixing groove 235 is integrally formed inside the space between the ball 231 and the housing 233.

The adjustment means 300 is a protrusion that is coupled to the height adjustment member 310 and the height adjustment member 310 connected to the support plate 130 in a vertically movable form to move the moving frame 200 forward or backward It consists of an adjustment member (320).

The height adjustment member 310 includes a plate-shaped base 311 having a circular or angular shape, an assembly rod 313 formed at a central portion of one surface of the base 311 and having a spring 312 fitted on the outer circumferential surface thereof, and an edge The support plate 130 is coupled in a form surrounding both sides of the support plate 130 and moves back and forth to the locking protrusion receiving groove 316 and the locking protrusion receiving groove 316 formed with a guide groove 314 on the inside and an elastic spring 315 on the outside. A pair of guiders 318 made of a locking protrusion 317 installed in a possible shape and a protrusion 319 that is caught in the long groove 132 formed in the support plate 130 at the center of the rear surface of the base 311.

The protrusion control member 320 is inserted into a hole (not shown) through which the assembly rod 313 passes on one side of the cylindrical body 321 and the inner side of the housing 233 on the other side. And the bone 323 is made in a state in which the seating protrusions 3221 and 3231 are formed in the central part, and a handle 324 for rotating the body 321 is integrally formed on the outer circumferential surface.

When explaining in detail the operation process of the lumbar support device for a chair capable of three-dimensional position adjustment according to the present invention configured as described above, first, in a state in which the fixing frame 100 is in close contact with the chair back frame (not shown). The fixing frame 100 is firmly fixed and installed on the backrest frame of the chair by screwing it into the backrest frame by passing the bolts 400 through the screw fastening holes 111 on both sides.

In the state in which the fixing frame 100 is installed as described above, the position of the height adjustment member 310 of the adjustment means 300 is moved upward or downward, and the height of the moving frame 200 connected to the adjustment means 300 is increased. Adjust.

That is, while the height adjustment member 310 moves up and down, the locking projections 317 of the guiders 318 formed on both sides of the base 311 overcome the elasticity of the elastic spring 315 while the locking portion 123 By moving beyond the peaks 121 and the valleys 122, the adjusted height of the height adjustment member 310 is fixed by the elasticity of the elastic spring 315.

In addition, the height adjustment member 310 has a protrusion 319 formed on one side of the base 311 is auxiliaryly caught in the long groove 132 of the support plate 130, so that the locking part 123 and the locking protrusion 317 are in close contact with each other. In addition, the adjusted height of the height adjustment member 310 is stably maintained without being lowered by the load.

On the other hand, the movable frame 200 is a lumbar or waist in response to various user body sizes by adjusting the degree of protrusion of the movable frame 200 by a protruding adjustment member 320 installed in the front side of the height adjustment member 310. It adheres to the part.

That is, the protrusion adjustment member 320 is in a state in which the peaks 322 and valleys 323 formed at one end are in close contact with the height adjustment portion 236 formed of the peaks and valleys of the moving frame 200 by the spring 312 It is assembled to keep it in close contact.

Rotation range made so that the user can rotate in the range of 150 degrees to 180 degrees while holding the handle 324 formed outside of the protruding control member 320 while the protruding control member 320 and the moving frame 200 are connected as described above. When rotated within the range of the adjusting part 232, the mountain of the protruding adjusting member 320 and the mountain part of the height adjusting part 236 of the moving frame 200 are in close contact, so that the moving frame 200 protrudes forward and adjusts the protrusion. The mountain of the member 320 and the valley portion of the height adjustment unit 236 of the moving frame 200 are in close contact with each other to adjust the position of the moving frame 200 to the front or rear side by moving the moving frame 200 to the rear. So that the position of the moving frame 200 is adjusted to fit the user's body.

In addition, the peaks 322 and valleys 323 of the protrusion adjustment member 320 and the peaks and valleys of the height adjustment portion 236 of the moving frame 200 are stably adjusted without shaking. In order to maintain it, the seating protrusions 3221 and 3221 and the seating groove (not shown) corresponding thereto are formed to stably maintain the adjusted position of the moving frame 200.

In addition, by forming a cushion unit 220 in a portion of the moving frame 200 in close contact with the user's lumbar or waist portion and supporting the user's lumbar or waist portion in a form that surrounds the user's lumbar or waist portion, the user can comfortably support the lumbar spine without feeling a hard foreign body. There are features that can be leaned on.

As described above, in the lumbar support device for a chair capable of three-dimensional position adjustment according to the present invention, unlike the prior art, the moving frame for supporting the lumbar and waist is moved in the vertical direction as well as in the front-rear direction to adjust the position of the user. As the lumbar part is kept tightly supported by the height appropriate to the body size and the anterior protrusion, it is possible to support the user's waist (lumbar) more comfortably and comfortably even if the user sits on a chair for a long time. There is a constitutive feature that can help the user's back health by preventing back pain such as low back pain.

Moreover, the lumbar support device for a chair capable of three-dimensional position adjustment according to the present invention has a structure in which the fixing frame can be easily fastened to the chair back frame with bolts, so that it can be easily installed on the backrest chair of a general configuration, so it has excellent supply power and is easy to install. It is simple and can be easily installed by a general user without the need for a technician for installation, and a cushion part is formed on the front of the moving frame to improve adhesion to the user's lumbar spine to provide a more comfortable sitting posture to the user. There is a characteristic.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been used herein, these are only used for the purpose of describing the present invention and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.

100: fixed frame 110: coupling portion
111: screw fastening hole 120: support plate receiving portion
121: mountain 122: goal
123: locking part 124: fastening hole
130: support plate 131: protruding hole
132: long groove
200: moving frame 210: through hole
220: cushion part 230: connection part
231: connection hole 232: rotation range adjustment part
233: housing 234: stepped
235: fixing groove 236: height adjustment unit
300: adjustment means 310: height adjustment member
311: base 312: spring
313: assembly rod 314: guide groove
315: elastic spring 316: locking projection receiving groove
317: stumbling protrusion 318: guider
319: protrusion 320: protrusion adjustment member
321: body 322: mountain
323: Goal 324: Handle
400: bolt

Claims (4)

In the lumbar support device for a chair, which is installed to buffer the user's lumbar or waist on the back frame of the chair,
The chair lumbar support device,
It is fixed to the chair back frame (not shown), has an upper and lower light form, is connected to the back frame of the chair on both sides of the lower side, and has a plurality of screw fastening holes 111 formed therein, and a plurality of mountains 121 on the inside. ) And a pair of locking portions 123 formed of valleys 122 and a support plate receiving portion 120 having a fastening hole 124 formed at the upper and lower portions thereof are integrally formed, and spaced apart from the support plate receiving portion 120 at regular intervals A fixing frame 100 composed of a support plate 130 which is screwed with a bolt 400 in a state in which the protruding holes 131 formed in the upper and lower portions are in close contact with the fastening hole 124 and
The fixed frame 100 is connected in a form in which the position is adjusted in the vertical and forward direction, and the through hole 210 through which the bolt 400 penetrates in the central part, the cushion part 220 on one surface, and the connection hole in the center part of the rear surface ( A housing 233 having a rotation range adjusting part 232 at an edge spaced apart from the 231 is formed, and a plurality of stepped jaws 234 and a fixing groove are formed inside the space between the connection hole 231 and the housing 233. The moving frame 200 in which the connection part 230 in which the height adjustment part 236 made of 235 is integrally formed is integrally formed, and
It is installed between the fixed frame 100 and the moving frame 200 so that the moving frame 200 is connected in a vertically movable form to both sides of the support plate 130 so that the position of the moving frame 200 can be adjusted in the vertical and forward direction, and the base 311 The locking protrusions 317 that are elastically caught in the locking portions 123 are formed on both sides of the assembly bar 313 inserted into the inside of the connection hole 231 on one side, and the spring 312 is inserted into the outer peripheral surface It is coupled to the outside of the assembly rod 313 and the height adjustment member 310 formed as a close contact with one surface of the height adjustment member 310, and is coupled to the handle 324 on the outside and the height adjustment part 236 on the other end Lumbar support device for a chair capable of three-dimensional position adjustment, characterized in that it comprises an adjustment means (300) consisting of a protruding control member (320) formed with a mountain (322) and a valley (323).
The method of claim 1,
The adjusting means 300,
A plate-shaped base 311 connected to the support plate 130 in a vertical movable form and having a circular or angular shape, and an assembly rod 313 formed at the center of one surface of the base 311 and fitted with a spring 312 on the outer circumferential surface ), the locking protrusion receiving groove 316 and the locking protrusion receiving groove 316 coupled to the edge in a form surrounding both sides of the support plate 130 and having a guide groove 314 on the inside and an elastic spring 315 on the outside. ) A height adjustment member 310 consisting of a pair of guiders 318 made of a locking protrusion 317 installed in a form capable of moving back and forth,
A hole (not shown) through which the assembly rod 313 passes on one side of the cylindrical body 321 and a plurality of peaks 322 and valleys 323 are formed in the cross-section of the cylindrical body 321 and are fitted inside the housing 233 on the other side. , It includes a protrusion adjusting member 320 integrally formed with a handle 324 for rotating the body 321 on the outer circumferential surface,
Here, while the guide groove 314 is connected to both sides of the support plate 130, the guide groove 314 moves upward and at the same time, the locking protrusion 317 is caught in the locking part 123 to fix the moving position, and the handle 324 is Lumbar support device for a chair capable of three-dimensional position adjustment, characterized in that it rotates within the moving range of the rotation range adjustment unit 232 of the moving frame 200 and protrudes the moving frame forward or depresses it rearward.
The method of claim 1,
Lumbar support device for a chair capable of three-dimensional position adjustment, characterized in that it further comprises a cushion unit 220 in close contact with the user's lumbar or waist on the front of the moving frame 200.
The method of claim 1,
A plurality of long grooves 132 are formed at regular intervals on one surface of the support plate 130, and a protrusion 319 is further included on one surface of the base 311 of the height adjustment member 310,
Here, the position of the height adjustment member 310 is auxiliaryly fixed through the configuration of the long groove 132 and the protrusion 319, a three-dimensional position adjustable chair lumbar support device.

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