KR102468455B1 - Lumbar Support Device for Chair with Height Adjustment - Google Patents

Abstract

The present invention relates to a lumbar support device for a chair with a height adjustment function and, more specifically, to a new type of lumbar support device for a chair with a height adjustment function, which has a lumber pad which is installed in a portion of a backrest frame corresponding to the lumbar to support the lumbar and is installed on the backrest frame to slide up and down and to automatically fix a moved state, and contacts a lumbar portion of a user through a simple operation of holding and vertically moving the lumbar pad or a lumbar support according to convenience, so that the height of the lumbar pad can be easily adjusted in response to the physical characteristics or conditions of the user, to increase the usability of the chair and make the structure simple, thereby reducing the assembly time of the chair, and to reduce the cost of manufacturing the chair, thereby increasing the purchasing desire of consumers.

Description

Lumbar Support Device for Chair with Height Adjustment

The invention relates to a lumbar support device for a chair having a height adjustment function, and more particularly, a lumbar pad supporting the lumbar vertebrae is installed in a corresponding part of the lumbar vertebrae of a chair back frame, and at the same time, the lumbar pad is installed on the back frame, It is configured to slide down and automatically fix the moved state, so that the chair user can make contact with the user's lumbar region through a simple motion of grabbing and moving the lumbar pad or lumbar support up and down according to convenience, responding to the user's physical characteristics or conditions So, by allowing the height of the lumber pad to be easily adjusted and used at any time, the usability of the chair is improved, and the assembly time of the chair can be shortened due to the simple configuration, and the overall chair manufacturing cost is reduced, thereby improving consumers' purchasing desire. It relates to a lumbar support device for a chair having a new type of height adjustment function that can be adjusted.

A chair is usually composed of a seat plate supporting a user's hip, a leg fixed to a lower part of the seat plate, and a backrest fixed to an upper part of the seat plate. The backrest supports the user's spine, and in particular, chairs equipped with a lumbar support device that separately supports the user's lumbar spine, that is, the lumbar spine, are widely used for the purpose of reducing the user's lumbar fatigue.

Looking at an example of the lumbar support device for supporting the lumbar spine as described above, Patent Registration No. 10-2314380 (Registration Date: October 13, 2021) The lumbar support for a chair includes a fixing part fixed to the front surface of the inner frame of the backrest, the above A first connection part having a rear end inserted inside the front of the fixing unit and moving in the up-down direction of the chair by a height adjusting means, a second connection part having a rear end fixed to the front end of the first connection part by a fastening means, and an inner side of the front end of the second connection part. It is characterized in that the rear end is inserted into the chair and moves in the front and rear direction of the chair by the depth adjusting means and includes a supporting portion supporting the lumbar spine.

As another prior art, Patent Registration No. 10-2390126 (Registration Date: April 20, 2022) A lumbar support device for a chair and a chair equipped with the same are a lumber frame fixed at both ends to the back frame of the chair, and a lumber frame A guide cover is fixedly installed in the guide cover, and a depth adjusting part inserted and installed so that the horizontal moving table slides in the forward and backward directions within the guide cover, and an accommodating hole for receiving the depth adjusting part, and operating pins fixedly installed on both sides of the horizontal moving table are in contact. Supported multi-stage support rails are provided at both ends of the receiving hole, and the vertical corrugated rail is in elastic contact with the elastic piece provided on the horizontal moving table of the depth control unit and the depth control lever that is supported in contact with one side of the lumber frame and moves in the vertical direction. Including a pad support part connected to be slidable in the vertical direction, and a lumbar pad fitted at both ends of the pad support part and elastically contacted and supported by the waist of the seated person, the horizontal movement platform is moved forward and backward by the up and down movement of the depth control lever. It is horizontally moved to adjust the depth of the lumber pad in the front and rear direction, and the height of the lumber pad is adjusted by the vertical movement of the pad support unit based on the horizontal moving table.

However, the lumbar support device installed in the conventional chair as described above has a structural feature in that the lumbar support device is configured to move up and down or rotate at a certain angle to support the user's lumbar spine, but the connection configuration between the lumbar support device and the back frame This is very complicated, so it is difficult for the user to adjust the height of the lumbar support device, and moreover, the configuration is complicated and a lot of cost is incurred in installing the lumbar support device. There is a problem.

Registered Patent Publication No. 10-2314380 (registration date: October 13, 2021) "lumbar support for chair" Registered Patent Publication No. 10-2390126 (registration date: April 20, 2022) "Lumbar support device for chair and chair equipped with it"

The present invention has been made in consideration of the above circumstances, and an object of the present invention is that the lumbar support device for a chair consists of a simple configuration of a lumbar pad supporting the user's lumbar spine and a lumbar support that moves the lumbar pad up and down. The object of the present invention is to provide a lumbar support device for a chair having a new type of height adjustment function capable of suppressing an increase in the production cost of the entire chair since the manufacturing cost can be reduced accordingly.

Moreover, the lumbar pad is automatically fixed to the height set by the user without a separate operation, so that the user can easily adjust the position of the lumbar pad to fit his or her body. Lumbar support device for chairs with convenient height adjustment function is providing

The problem to be solved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned above can be clearly understood by those skilled in the art from the description below. will be.

The object of the present invention described above is to protrude toward the front side of the backrest frame and adhere to the user's lumbar spine, and is composed of a round smooth surface so that there is no foreign body feeling when the front side is in close contact with the user's lumbar spine. Female screws of lumbar support on the upper and lower parts A lumber pad having a through hole communicating with the ball, and a pair of female screw holes formed on the same line as the through hole of the lumber pad are formed on both sides, and a guide hole formed in the longitudinal direction in the shape of a "c" cross section and constant on both sides of the guide hole A lumbar support in which a plurality of locking protrusions formed at intervals are integrally formed, a receiving part for receiving the lumbar support is formed in the central portion, and a hole fixed to the backrest frame on both sides, As long as it is in close contact with the holding protrusion inside the receiving part to have elasticity A fixed bracket integrally formed with a pair of elastic protrusions, a screw fastening hole, and a protruding jaw to prevent the support plate from falling out, and a lumbar support coupled to the fixing bracket and attached to the inside, and inserted into the guide hole in the central part. It can be achieved by a lumbar support device for a chair having a height adjustment function, characterized in that it includes a support plate integrally formed with a connection protrusion formed with a screw hole and a plurality of long grooves to minimize the contact area with the lumber support on the side. .

The lumber support further includes protrusions on both sides of the guide ball, and further includes a moving space between the protruding surface of the fixing bracket and the guide rail, where the protrusions are accommodated in the moving space to move the lumber support without shaking. It is characterized by guaranteeing.

The lumber pad further includes a guide protrusion in the form of "ㅡ" on the rear side, and at both ends of the lumber support, further includes fitting grooves into which the guide protrusions are fitted, whereby the guide protrusion and the fitting groove It is characterized in that the combined state of the and lumber support is firmly fixed without shaking.

The fixing bracket further includes an extension groove communicating with the top and bottom of the screw fastening hole formed on the protruding surface, and the support plate further includes protrusions on the top and bottom of the screw hole of the connecting protrusion, wherein the protrusion extends. It is fitted into the groove to prevent shaking of the support plate during movement.

As described above, the lumbar support device for a chair having a height adjustment function according to the present invention moves the lumbar pad or lumbar support up and down while the user is holding the lumbar pad to adjust the position of the lumbar pad to fit the user's lumbar region. The height of the lumbar support device can be easily adjusted with a simple operation of raising or lowering the pad at the same time, so that anyone, regardless of age or gender, can easily adjust the position of the lumbar pad.

In addition, in the lumbar support device for a chair having a height adjustment function according to the present invention, the configuration of the lumbar support device is made of a simple lumbar pad, a lumbar support, a fixing bracket, and a support plate. can be remarkably reduced, which has the effect of minimizing the increase in actual chair manufacturing cost.

Therefore, since a consumer can purchase a chair having a lumbar support function at a low cost, there is an effect that an increase in sales volume can be expected through an improvement in the consumer's purchasing desire.

Furthermore, in the process of moving the lumber support supported by the lumber pad connected to the fixed bracket, the hooking part of the support plate is fitted into the guide ball formed in the central part of the lumber support, and the protrusions formed on both sides of the guide ball are attached to the guide rail of the fixed bracket. By being inserted and inducing the vertical movement of the lumbar support, there is an effect of ensuring stable vertical movement without shaking of the lumbar pad coupled to the lumbar support.

Effects of the present invention are not limited to the effects mentioned above, and various effects may be included within a range apparent to those skilled in the art from the contents to be described below.

1 is a perspective view of a state in which a lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention is installed on a back frame;
Figure 2 is a photograph of a state in which the lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention is installed on a back frame
Figure 3 is an exploded perspective view of the lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention
Figure 4 is a front and rear perspective view of a fixing bracket of the lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention
Figure 5 is a perspective view showing a coupled state of the lumbar support and the fixing bracket of the lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention
Figure 6 is a front view showing a coupled state of the lumbar support and the fixing bracket of the lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention
Figure 7 is a view showing a cross section of the AA line portion of Figure 6
8 is a view showing a cross section of the BB line portion of FIG. 6

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, since the description of the present invention is only 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 embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes 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 such effects, the scope of the present invention should not be construed as being limited thereto.

On the other hand, the meaning 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 another, and the scope of rights should not be limited by these terms.

For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as “connected” to another element, it may be directly connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as being “directly connected” to another element, it should be understood that no intervening elements exist. Meanwhile, other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

Singular expressions should be understood to include plural expressions unless the context clearly dictates otherwise, and terms such as “comprise” or “having” refer to a described feature, number, step, operation, component, part, or It should be understood that it is intended to indicate that a combination exists, and does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

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

Now, a lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a state in which a lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention is installed on a backrest frame, and FIG. 2 is a height adjustment function according to a first embodiment of the present invention. 3 is an exploded perspective view of the lumbar support device for a chair having a height adjustment function according to a first embodiment of the present invention, and FIG. A front and back perspective view of a fixing bracket among lumbar support devices for chairs having height adjustment function according to the first embodiment, and FIG. 5 is a lumbar support device for chairs having height adjustment function according to the first embodiment of the present invention. It is a perspective view showing the coupling state of the support and the fixing bracket, and FIG. 6 is a front view showing the coupling state of the lumbar support and the fixing bracket in the lumbar support device for a chair having a height adjustment function according to the first embodiment of the present invention. FIG. is a view showing a cross section of the line A-A of FIG. 6, and FIG. 8 is a view showing a cross section of the line B-B of FIG.

The invention relates to a lumbar support device for a chair having a height adjustment function, and more particularly, a lumbar pad supporting the lumbar vertebrae is installed in a corresponding part of the lumbar vertebrae of a chair back frame, and at the same time, the lumbar pad is installed on the back frame, It is configured to slide down and automatically fix the moved state, so that the chair user can make contact with the user's lumbar region through a simple motion of grabbing and moving the lumbar pad or lumbar support up and down according to convenience, responding to the user's physical characteristics or conditions So, by allowing the height of the lumber pad to be easily adjusted and used at any time, the usability of the chair is improved, and the assembly time of the chair can be shortened due to the simple configuration, and the overall chair manufacturing cost is reduced, thereby improving consumers' purchasing desire. It relates to a lumbar support device for a chair having a new type of height adjustment function that can be adjusted.

As shown, the lumbar support device for a chair having a height adjustment function according to the present invention (hereinafter, referred to as a 'lumbar support device') 100 is installed under the back frame 200 of the chair 1 and Lumber pad 10 that protrudes to the front side of the horizontal bar 210 of 200 and is in close contact with the user's lumbar spine, and approximately "c" shaped lumbar support 20 fixed to the top and bottom of the lumber pad 10 ), and the fixing bracket 30 and the fixing bracket 30 fixed to the horizontal bar 210 of the backrest frame 200 by being in close contact with the inside of the lumber support 20 to fix the moving position of the lumber support 20 It is coupled to and is configured to include a support plate 40 that is in close contact with the lumber support 20 fitted inside.

The lumber pad 10 is composed of a round-shaped smooth surface 11 so that the front surface exposed to the front side of the backrest frame 200 does not feel foreign when in close contact with the user's lumbar spine, and the upper and lower parts of the lumbar support 20 A through hole 12 communicating with the assembly hole 22 is formed, and a through hole 12 is formed around the through hole 12 on the rear side and the end of the hole 13 inserted into the assembly hole 22 and the upper and lower parts of the "ㅡ" The guide protrusion 14 in the form of " is integrally formed.

The lumber support 20 is composed of a substantially "c" shape in cross section, and the hole 13 is fitted at the top and bottom, and the female screw hole 21 is formed to communicate with the assembly hole 22 and the guide protrusion 14 A fitting groove 23 into which is inserted is formed, and a guide hole 24 formed in the longitudinal direction in the central portion and a protrusion 25 are formed around the guide hole 24, and a plurality of Protrusions 26 are formed at regular intervals.

The fixing bracket 30 has a hole 31 screwed to the horizontal bar 210 on both sides and a receiving portion 32 in which the lumber support 20 is accommodated in a movable form in the center portion, and the receiving portion ( 32), a pair of elastic protrusions 33 that are in close contact with the protrusion 26 to have elasticity, and a screw fastening hole 34 for coupling with the support plate 40 in the central portion of the lumber support 20 A pair of guide rails 35 are formed in close contact with one surface of the protrusion 25, and a protrusion 36 for preventing the support plate 40 from falling out is integrally formed.

In particular, the screw fastening hole 34 is formed on the protruding surface 37 protruding inward of the receiving part 32, and the protruding surface 37 and the guide rail 35 are formed by the thickness of the protruding part 25. By forming a moving space 38 spaced apart, the lumber support 20 is induced to move without shaking in the process of moving up and down.

In addition, an extension groove 39 communicating with the top and bottom of the screw fastening hole 34 is further formed on the protruding surface 37, so that the protrusion formed on the support plate 40 in the process of being in close contact with the support plate 40 after the car ( ) is inserted to prevent the support plate 40 from shaking.

The support plate 40 has one surface in close contact with the outer surface of the lumber support 20, is fitted into the guide hole 24 at the center, and has a connection protrusion 42 formed with a screw hole 41. Lumber support to the side A plurality of long grooves 43 for minimizing the contact area of (20) are integrally formed.

In addition, protrusions 44 fitted into the extension grooves 39 are formed on the upper and lower portions of the connection protrusion 42 where the screw holes 41 are formed.

In addition, the support plate 40 is in a state where the lumbar support 20 is accommodated in the receiving part 32 of the fixing bracket 30 in the process of being coupled with the fixing bracket 30, the support plate 40 of the lumbar support 20 It adheres to the back side, and both sides of the support plate 40 are caught on the protruding jaw 36 of the fixing bracket 30, and the coupled state is maintained, and at the same time, the lumber support 20 firmly maintains the state inserted into the fixing bracket 30 let it

Hereinafter, an operating state of the lumbar support device for a chair having a height adjustment function according to the first embodiment of the present invention configured as described above will be described.

First, the lumber pad 10 is coupled with the lumber support 20 from the rear side. The lumber pad 10 has guide protrusions 14 and holes 13 formed on the back side of the lumber support 20. Lumber pad 10 and lumber support 20 are coupled as a bolt (not shown) passes through through hole 12 and is screwed into female screw hole 21 in a state where it is inserted into 23 and assembly hole 22 It is firmly assembled to physically prevent deformation of the coupled state of the bolt due to shaking or frequent movement of the coupling part.

In addition, in the state in which the lumber pad 10 and the lumber support 20 are assembled, the support plate 40 is provided at the rear in a state where the central portion of the lumber support 20 is accommodated in the receiving portion 32 of the fixing bracket 30 It is caught on the protruding jaw 36 of the fixing bracket 30 and the coupled state is maintained. It is located between the formed protrusions 26 and the combined position is maintained.

In addition, in the state in which the lumbar support device 100 is assembled as described above, in a state in which the support plate 40 side of the fixing bracket 30 is in close contact with the horizontal bar 210 of the back frame 200, the fixing bracket 30 The lumbar support device 100 is installed on the backrest frame 200 by fixing it to the horizontal bar 210 by coupling bolts (not shown) to the holes 31 formed on both sides.

As described above, in the state where the lumbar support device 100 is assembled to the back frame 200, when the user wants to adjust the height of the lumbar pad 10 of the lumbar support device 100 to fit the user's body, the lumbar pad (10) or holding the upper or lower end of the lumber support 20 and moving the lumber pad 10 up or down, the protrusion 26 formed on the lumber support 20 is the elastic protrusion 33 of the fixing bracket 30 ), the height of the lumber pad 10 is deformed by overcoming the pressing force by the elasticity of the elastic protrusion 33 by the pressing force by the user in the state of being caught in the), and the height of the lumber pad 10 is deformed, and in the state where the height is adjusted, the fixed bracket ( The elastic projection 33 of 30) is inserted between the locking projections 26 of the lumber support 20 by elasticity, and the adjusted position is firmly fixed.

In particular, the lumber support 20 is fitted with a connecting protrusion 42 of the support plate 40 coupled to the fixing bracket 30 to the guide ball 24 that limits the height movement range in the process of moving up and down. At the same time as it is moved, the protruding jaws 36 on both sides move up and down while being fitted in the moving space 38 of the fixed bracket 30, so that the lumbar support 20 is moved up and down by the fixed bracket 30. Backrest frame 200 The assembled state is firmly maintained, and at the same time, by moving in a state of being inserted into the moving space 38, the vertical movement is performed in a stable environment without left and right shaking, so as not to cause fatigue in the surrounding assembly environment due to shaking during movement. Lumbar support device There is a feature that can always firmly maintain the assembled state of (100).

As described above, the lumbar support device for a chair having a height adjustment function according to the present invention moves the lumbar pad or lumbar support up and down while the user is holding the lumbar pad to adjust the position of the lumbar pad to fit the user's lumbar region. It is possible to easily adjust the height of the lumbar support device with a simple operation of raising or lowering the pad at the same time as holding the pad, so anyone of all ages can easily adjust the position of the lumbar pad.

In addition, in the lumbar support device for a chair having a height adjustment function according to the present invention, the configuration of the lumbar support device is made of a simple lumbar pad, a lumbar support, a fixing bracket, and a support plate. can be remarkably reduced, which has the effect of minimizing the increase in actual chair manufacturing cost.

Therefore, consumers can purchase a chair with a lumbar support function at a low cost, so it is possible to expect an increase in sales volume through the improvement of consumers' purchasing desire. Moreover, the lumbar support supported by the lumbar pad is connected to the fixed bracket In the process of being moved up and down, the hanging part of the support plate is inserted into the guide ball formed in the central part of the lumber support, and the protrusions formed on both sides of the guide ball are inserted into the guide grooves of the fixing bracket to induce the vertical movement of the lumber support. There is a structural feature that can guarantee stable up-and-down movement without shaking of the lumber pad coupled to.

As described above, the optimum embodiment has been disclosed in the drawings and specifications. Although specific terms are used herein, they 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. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: lumber pad 11: smooth surface
12: through hole 13: through hole
14: guide protrusion
20: lumber support 21: female screw hole
22: assembly hole 23: fitting groove
24: guide hole 25: protrusion
26: stumbling block
30: fixing bracket 31: hole
32: receiving part 33: elastic protrusion
34: screw fastening hole 35: guide rail
36: protruding jaw 37: protruding surface
38: moving space 39: extension home
40: support plate 41: screw hole
42: connection protruding jaw 43: long groove
44: protrusion
200: back frame
210: horizontal bar

Claims (4)

A lumbar support device for a chair coupled to a backrest frame of a chair and having a height-adjustable function for supporting a user's lumbar spine, comprising:
The lumbar support device for a chair having the height adjustment function,
It protrudes to the front side of the backrest frame 200 and adheres to the user's lumbar spine. A lumber pad 10 having a through hole 12 communicating with the female screw hole 21,
A pair of female screw holes 21 formed on the same line as the through hole 12 of the lumber pad 10 are formed on both sides, and the guide hole 24 formed in the longitudinal direction in the shape of a "c" cross section and the guide A lumbar support 20 integrally formed with a plurality of protrusions 26 formed at regular intervals on both sides of the ball 24,
The accommodating portion 32 in which the lumber support 20 is accommodated is formed in the central portion, and the hole 31 fixed to the backrest frame 200 on both sides, and the protrusion 26 on the inside of the accommodating portion 32 A fixing bracket 30 integrally formed with a pair of elastic protrusions 33, screw fastening holes 34, and protruding jaws 36 for preventing the support plate 40 from falling out,
It is coupled to the fixing bracket 30 and adheres to the lumber support 20 fitted inside, and is inserted into the guide hole 24 at the center, and the connecting protrusion 42 with the screw hole 41 formed and the lumber support on the side Lumbar support device for a chair having a height adjustment function, characterized in that it includes a support plate 40 integrally formed with a plurality of long grooves 43 for minimizing the contact area with (20).
According to claim 1,
The lumber support 20 further includes protrusions 25 on both sides of the guide hole 24,
Further comprising a moving space 38 between the protruding surface 37 of the fixing bracket 30 and the guide rail 35,
Here, the lumbar support device for a chair having a height adjustment function, characterized in that the protrusion 25 is accommodated in the moving space 38 to ensure the vertical movement of the lumbar support without shaking.
According to claim 1,
The lumber pad 10 further includes a “ㅡ” shaped guide protrusion 14 on the rear side,
Both ends of the lumber support 20 further include fitting grooves 23 into which the guide protrusions 14 are fitted,
Here, the lumbar pad 10 and the lumbar support 20 are firmly fixed without shaking by the guide protrusion 14 and the fitting groove 23 Lumbar support device for a chair having a height adjustment function .
According to claim 1,
The fixing bracket 30 further includes an extension groove 39 communicating with the top and bottom of the screw fastening hole 34 formed on the protruding surface 37,
The support plate 40 further includes projections 44 on the upper and lower portions of the screw holes 41 of the connection protruding jaws 42,
Here, the protrusion 44 is inserted into the extension groove 39 to prevent the support plate 40 from shaking during movement.

Images