KR200447525Y1

KR200447525Y1 - Height adjusting structure of lumbar support for a chair

Info

Publication number: KR200447525Y1
Application number: KR2020070015249U
Authority: KR
Inventors: 이종환
Original assignee: 주식회사 선일
Priority date: 2007-09-12
Filing date: 2007-09-12
Publication date: 2010-02-03
Also published as: KR20090002656U

Abstract

The present invention relates to a lumbar support for a chair, and in particular, it is possible to quickly and easily adjust the height of the lumbar support installed on the back of the chair, as well as to provide a stable lumbar support for the chair that can maintain a stable and firm height. To provide a height adjustment structure of.

To this end, in the present invention, a guide frame having a plurality of locking grooves formed on one side thereof is installed to surround both sides of the guide frame, and the lifting groove is movable up and down, and the locking groove of the guide frame is formed through a pinhole formed inside the spotter. A stop pin to be coupled, a slider that slides along the inner side of the spotter and a slider for releasing or maintaining the engagement state of the stopper and the stop pin, and a pair of adjusting knobs rotatably installed inside the spotter to lift and move the slider. A height adjustment structure of a lumbar support for a chair is disclosed.

Chair, lumbar support, spotter, adjustment knob, slider

Description

Height adjustment structure of lumbar support for chair {{HEIGHT ADJUSTING STRUCTURE OF LUMBAR SUPPORT FOR A CHAIR}

The present invention relates to a height adjustment structure of the lumbar support for a chair, and more particularly, it is possible to quickly and easily adjust the height of the lumbar support installed on the back of a chair, and the adjustment state of the height is firm and stable. It relates to the height adjustment structure of the lumbar support for the chair that can be maintained with.

In general, the chair separates each other from the seat supporting the buttocks of the user and the backrest supporting the back part to provide comfort and comfort by allowing the backrest to be tilted or elastically bent at an angle when subjected to external force.

If you sit in such a chair for a long time, due to an incorrect posture, such as bending the back, the burden on the lower back causes pain or fatigue. This is because the gentle "C" shaped lumbar spine located in the lower part of the human spine is straightened and the load of the upper body is concentrated on the lumbar spine without being evenly distributed throughout the spine.

Accordingly, a chair having a lumbar support for supporting the lumbar spine in the lower part of the chair back has been proposed in various forms.

For example, in the lumbar support chair disclosed in Republic of Korea Utility Model Publication No. 379971, as shown in Figure 1, the support (2) connected to the lumbar support (3) is inserted into the perforations (4) of the backrest 1, The support 2 is configured to elastically adhere as the ball 5 along the uneven portion 7 formed in the perforated portion 4.

The lumbar support chair is pushed up and down strongly 2 or 2 because the support 2 is elastically supported on the back 1 by the balls 5 and the springs 6 installed on both sides of the support 2. By pulling, the height of the lumbar support 3 can be adjusted according to the user's physical condition or sitting posture or habit.

However, the above-described conventional chair has a characteristic in which the lumbar support 3 maintains its height by mutual surface contact between the ball 5 and the uneven portion 7, and a portion where the lumbar support 3 and the backrest 1 support. And the lumbar support 3 is inclined to deviate from the backrest 1 due to the impact force from the outside due to different loads or the upper body load of the user applied in the process of tilting the backrest 1 while the user is not in the chair. As the spring 6 is twisted and compressed, the ball 5 is easily detached from the uneven portion 7, and thus the lumbar support 3 is freely moved and flows.

Therefore, the conventional chair has a structural defect that does not stably maintain the position of the lumbar support 3, which is most suited to the user's physical condition.

In view of the above, the present inventors have made an effort to develop a structural aspect capable of stably maintaining the height of the lumbar spine, and to adjust the height of the lumbar spine to adjust the height at the same time. We have studied and devised the present invention as a result.

Therefore, an object of the present invention is to provide a height adjustment structure of the lumbar support for the chair to be able to quickly and easily adjust the height of the lumbar support.

Another object of the present invention is to provide a height adjustment structure of the lumbar support for the chair to maintain the height of the lumbar support is firmly and stably adjusted.

In order to achieve the above object, the present invention provides a guide frame having a plurality of locking grooves formed on one side, and installed to surround both sides of the guide frame, and a lifter movable up and down, and a pinhole formed inside the spotter. A stop pin coupled to the locking groove of the guide frame through the guide frame, and a slider for slidably moving along the inner side of the spotter to release or maintain the engagement state of the locking groove and the stop pin, and to be rotatable inside the spotter. It is provided to provide a height adjustment structure of the lumbar support for a chair including a pair of adjustment knobs for lifting the slider.

The present invention having the configuration and the problem solving means as described above is able to release or maintain the state in which the spotter is fixed to the guide frame through a simple operation of the adjustment knob. Therefore, there is an effect that can quickly and easily adjust the height of the lumbar support.

In addition, the present invention is because the control knobs provided in a pair of left and right are interlocked with each other by the sector gear, even if only one control knob is operated, the other control knob rotates in the opposite direction at the same time to raise the slider stably. . Therefore, the fixed state between the spotter and the guide frame can be easily controlled and set.

In addition, the present invention is to maintain a state in which the stop pin is in close contact with the engaging groove of the guide frame by the slider tightly and stably the height of the lumbar support is adjusted. Therefore, there is an effect that the lumbar support can freely rise and fall due to external force such as a load applied by the user in the process of tilting the backrest.

Moreover, the present invention can easily adjust the lumbar support in the user's body shape or the desired position because the user can adjust the height of the lumbar support by simply pressing the adjusting knob by tilting both arms or one hand backwards while sitting on the chair. There is a very useful effect that can maximize the fit and comfort.

Hereinafter, a configuration according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

Prior to this, terms to be described below are defined in consideration of functions in the present invention, and it should be understood that they should be interpreted as concepts and commonly used meanings consistent with the technical idea of the present invention.

In addition, when it is determined that the detailed description of known functions or configurations related to the present invention may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 2 shows a lumbar support for a chair according to an embodiment of the present invention, Figure 3 is a view showing a state in which the lumbar support for a chair according to an embodiment of the present invention is installed on the back of the chair, Figures 2 and 3 As shown, the height adjustment structure of the lumbar support for the chair according to an embodiment of the present invention is guide frame 10, the spotter 20, the stop pin 30, the slider 40 and the adjusting knob 50 It is configured to include.

First, the guide frame 10 is coupled to the front portion of the backrest frame 200 is formed in a shape having an ergonomic curvature so as to comfortably support the user's back and back, the lifting movement of the spotter 20 It serves as a guide rail.

The front of the guide frame 10 is formed with a plurality of grooves 11 of the concave-convex shape to allow a portion of the stop pin 30 to be engaged in the vertical direction.

The spotter 20 is installed to cover both sides of the guide frame 10 and is capable of lifting and lowering. A pinhole penetrated slightly larger than the length and width of the stop pin so that the stop pin 30 can be moved back and forth within the guide frame 10 ( 23 is formed, and around the pinhole 23, guide jaws 22 for stably guiding the sliding of the slider 40 are formed, and shaft holes of the adjusting knob on both upper sides of the inner jaw 22. The rotating shaft 24 which is axially coupled with the 51 is formed.

In addition, the rear surface of the spotter 20 is provided with a guide protrusion 21 to surround the both sides of the guide frame 10 to prevent sliding from each other while sliding along the vertical direction of the guide frame 10, both sides The elastic wings 28 are elastically supported to elastically support the pad 60 to be in close contact with the lumbar region of the user or in close contact with the lumbar region of the user.

In addition, the cover 25 to the front of the spotter 20 so that the stop state of the stop pin 30, the slider 40 and the adjustment knob 50 can be stably maintained without being separated or flowed in the interlocking process. Is combined.

The stop pin 30 is coupled to the locking groove 11 of the guide frame through the pinhole 23 formed in the inner side of the spotter, and has a cylindrical shape, so that the plurality of locking grooves 11 move according to the lifting and lowering of the slider 40. The rolling motion over ()) will selectively change the position of the spotter 20.

The stop pin 30 is tightly constrained between the pinhole 23 of the spotter and the locking groove 11 of the guide frame by the flow preventing jaw 43 of the slider, so that the spotter 20 is freely moved up and down. prevent.

Slider 40 is to slide or move along the guide jaw 22 formed on the inner side of the spotter to play a role of releasing or maintaining the engaging state 11 and the stop pin 30 of the guide frame, the back In the pin groove 42 and the stop pin 30 to allow the stop pin 30 to be separated from the locking groove 11 and the flow prevention jaw 43 is prevented from being separated or flow from the locking groove 11 is formed in the At the top, a spring 45 is provided to provide the elastic restoring force so that the slider 40 can be quickly returned to its original position.

In addition, the inclined surfaces 41 are symmetrical to both lower sides of the slider 40 so that the lifting operation of the slider 40 that interlocks with the rotation about the rotation axis 24 of the adjustment knob 50 can be performed more smoothly. It is formed.

The adjusting knob 50 is rotatably installed on the inner side of the spotter 20 and serves to elevate the slider 40. An upper part of the adjustment knob 50 is provided to facilitate gripping and manipulation. It protrudes or is exposed to the upper outer side of the porter 20.

And one side of the adjustment knob 50 is formed with a shaft hole 51 to be coupled to the rotary shaft 24 of the spotter, the lower portion inclined surface 41 of the slider when rotating around the rotary shaft 24 A rising protrusion 53 which raises the slider 40 while sliding along it is formed.

These adjustment knobs 50 are installed symmetrically with each other in a pair of left and right inside the spotter 20 so that the slider 40 can be raised more quickly and easily.

In addition, along the periphery of the shaft hole 51 of the pair of left and right adjustment knobs 50 and 50 ', the sector gears 52 are formed to correspond to each other so that the left and right pair of adjustment knobs 50 and 50' By being engaged, even when only one adjustment knob 50 is operated, the other adjustment knob 50 'is rotated in the opposite direction at the same time, so that the slider 40 can be raised stably and easily.

The pad 60 is coupled to the front of the elastic wing 28 of the spotter and serves to support the lumbar region of the user, elastically close to the lumbar region of the user by the elastic force of the elastic wing 28 to the user's body shape It will provide optimum comfort and support.

Since the pad 60 is fixedly coupled to the spotter 20, the pad 60 moves up and down together with the spotter 20.

Referring to the operation of the lumbar support according to an embodiment of the present invention configured as described above are as follows.

As shown in Figures 4a and 4b and 5a and 5b, when adjusting the height of the lumbar support 100, first, by pressing the adjustment knob 50 down to rotate about the rotary shaft 24, the adjustment knob 50 Ascending protrusions 53 formed at the lower portion of the) slide along the inclined surface 41 of the slider to raise the slider 40 forcibly restraining the stop pin 30.

At this time, the stop pin 30 is moved to the pin groove 42 of the slider to naturally move away from the locking groove 11 to release the fixed state of the spotter 20 and the guide frame 10, thereby Lumbar support 100 is in a state capable of lifting freely.

In addition, the spring 45 mounted on the upper portion of the slider 40 is compressed by the upward movement of the slider 40 to generate a compressive stress to return to its original state.

In this state, as shown in FIGS. 4C and 5C, the spotter 20 can be moved up or down by adjusting the up and down to move the lumbar support 100 to an appropriate position desired by the user.

Afterwards, when the adjustment knob 50 is pressed or released, the slider 40 is elastically returned to its original position by the compressive stress of the spring 45, and the stop pin 30 is coupled to the locking groove 11. At the same time, the movement preventing jaw 43 of the slider forcibly restrains the stop pin 30.

Therefore, the height adjustment of the lumbar support 100 can be made quickly and easily, and the lumbar support 100 can be firmly and stably maintained without flow.

On the other hand, the present invention is not limited to the above-described embodiment and the accompanying drawings, it can be changed to other embodiments equivalent to substitution and equivalent within the scope without departing from the technical spirit of the present invention is usually in the art It will be evident to those who have knowledge of.

1 is a cross-sectional view showing the main portion height adjustment structure of the lumbar support for chair according to the prior art,

Figure 2 is an exploded perspective view showing a lumbar support for a chair according to an embodiment of the present invention,

Figure 3 is a perspective view showing the main portion of the lumbar support for the chair according to an embodiment of the present invention installed on the back of the chair,

Figure 4a to 4c is a side cross-sectional view showing the operating state of the lumbar support for a chair according to an embodiment of the present invention,

5a to 5c is a front view showing an operating state of the lumbar support for a chair according to an embodiment of the present invention.

10: guide frame 11: locking groove

20: spotter 21: guide protrusion

22: guide jaw 23: pinhole

24: rotating shaft 25: cover

28: elastic wing 30: stop pin

40: Slider 41: Slope

42: pin groove 43: flow prevention jaw

45: spring 50: adjustment knob

51: shaft hole 52: sector gear

53: rising protrusion 54: gripping portion

60: pad 100: lumbar support

200: back frame

Claims

A guide frame having a plurality of locking grooves formed at one side thereof;

A spotter installed to cover both sides of the guide frame and being movable up and down;

A stop pin coupled to the locking groove of the guide frame through a pin hole formed inside the spotter;

A slider that slides along the inner side of the spotter while releasing or maintaining the engagement state between the locking groove and the stop pin; And

A pair of adjusting knobs rotatably installed inside the spotter to lift and lower the slider;

Height adjustment structure of the lumbar support for the chair comprising a.

The method of claim 1,

The pair of adjustment knobs are formed so that the gears are engaged with each other on the opposite surface to adjust the height of the lumbar support for the chair, characterized in that the other control knob is rotated simultaneously in the opposite direction when operating one of the control knobs rescue.

The method according to claim 1 or 2,

The lower part of the adjustment knob to form a rising projection and the lower side of the slider to form an inclined surface, the back lumbar support for the chair, characterized in that to raise the slider as the rising protrusion slides along the inclined surface of the slider when the adjustment knob is rotated Height adjustment structure.

The method according to claim 1 or 2,

Height adjustment structure of the lumbar support for chair further comprising a pad coupled to the spotter to support the lumbar region of the user.