CN210810080U - Chair with adjustable waist rest height and chair back thereof - Google Patents

Abstract

The utility model relates to a chair with adjustable waist rest height, which comprises a supporting seat, a chair back and a chair seat. The supporting base is provided with a plurality of rollers. The chair back is provided with a frame, a covering body and a waist support part. The frame has a hollow portion. The waist rest part is positioned in the hollow part and can be connected with two opposite inner sides of the frame in a sliding way so as to change the height of the waist rest part on the frame. The covering body covers the hollow-out part and the waist rest part of the frame. The chair seat is connected with the supporting seat and the chair back. Therefore, through the framework, a user can adjust the height position of the waist support part by himself to accurately lean against the expected waist position of the user, and the timing of fatigue feeling and waist soreness and back pain discomfort is generated after a delay.

Description

Chair with adjustable waist rest height and chair back thereof

Technical Field

The utility model relates to a seat, in particular to a seat with adjustable waist rest height.

Background

In order to allow a person working for a long time to work comfortably without causing discomfort such as fatigue and soreness of the waist and back, it is important to adjust an office chair that requires ergonomics to an appropriate state.

Although the conventional office chair can allow a person to adjust the height of the chair, the reclining angle of the chair back, the height of the armrests, and the like at will, the lumbar support of the office chair in the market cannot be adjusted to the lumbar position of various body heights and body shapes because the lumbar positions of the upper half of the human body are different, and therefore, the office chair cannot be accurately abutted to the lumbar position expected by the user.

Therefore, how to develop a solution to improve the above-mentioned disadvantages and inconveniences is an important issue that related manufacturers have been reluctant to find.

Disclosure of Invention

An object of the utility model is to provide a seat and back of the chair of adjustable waist height for solve the problem that prior art exists.

The purpose of the utility model and the technical problem to be solved are realized by adopting the following technical scheme. According to the utility model, the chair back of the chair comprises a frame, a waist rest part and a covering body. The frame has a hollow portion. The waist rest part is positioned in the hollow part and can be connected with two opposite inner sides of the frame in a sliding way so as to change the height of the waist rest part on the frame. The covering body covers the hollow-out part and the waist rest part of the frame.

The purpose of the utility model and the technical problem to be solved can be further realized by adopting the following technical measures.

According to one or more embodiments of the present invention, in the seat back, the frame further includes two guiding portions. The guide parts are respectively formed on the two opposite inner sides of the frame. The waist rest part comprises a bracket, a cushion body and two sliding blocks. The cushion body is fixedly connected on the bracket and is positioned between the covering body and the bracket. The sliding blocks are respectively positioned at two opposite ends of the bracket, and each sliding block can be slidably jointed with one of the guiding parts.

According to one or more embodiments of the present invention, in the chair back, the frame further includes two first connecting portions. The first connecting parts are positioned at the two opposite inner sides of the frame. The lumbar support part further comprises two second connecting parts and two elastic components. The second connecting parts are oppositely and respectively positioned on the brackets. Each second connecting portion is detachably abutted against one of the first connecting portions. Each elastic component is coupled with the bracket and one of the second connecting parts and used for moving the second connecting part to the corresponding first connecting part.

According to one or more embodiments of the present invention, in the chair back, each first connecting portion further comprises a recess portion and a first rack interface. The recess is formed in one of the inner sides of the frame. The first rack interface is located within the recess. Each second connection portion includes a second rack interface. The second rack interfaces are located at two opposite ends of the bracket, respectively, and each second rack interface directly engages the first rack interface in the recess.

According to one or more embodiments of the present invention, in the chair back, each of the second connecting portions includes a moving member and a button portion. The moving member is slidably positioned on the bracket. The second rack interface is located on one side of the moving part and is used for directly engaging with the second rack interface in the concave part. The button part can be located on the bracket in a sliding mode and pushes against the moving part. The elastic component is coupled with the bracket and the button part. Therefore, when the button part moves and the moving part moves out of the concave part, the button part compresses the elastic component, and the second rack interface is separated from the first rack interface, so that the waist rest part can relatively slide on the guide part of the frame through the sliding block.

According to one or more embodiments of the present invention, in the seat back, each end of the bracket is formed with a first guide groove and a second guide groove overlapping each other. The long axis direction of the first guide groove is orthogonal to the long axis direction of the second guide groove. The waist rest part further comprises two cover bodies. Each cover body removably covers one of the second guide grooves and is connected with one of the sliding blocks. The second guide groove is positioned between the first guide groove part and the cover body, the moving part is positioned in the first guide groove in a sliding manner, and the button part is positioned in the second guide groove in a sliding manner and positioned between the moving part and the cover body.

According to one or more embodiments of the present invention, in the chair back, the button portion has a slanted groove. The long axis direction of the inclined groove intersects the long axis direction of the first guide groove and the long axis direction of the second guide groove. The moving part is provided with a lug. The bump is slidably limited in the inclined groove. Therefore, when the button part is pressed along a first direction, the button part pushes the convex block of the moving part through the inclined groove, so that the moving part moves out of the concave part along a second direction, wherein the first direction and the second direction are mutually orthogonal.

According to one or more embodiments of the present invention, in the seat back, the lower side surface of the bracket has an opening, and the button portion protrudes downward from the opening.

In accordance with one or more embodiments of the present invention, in the chair back described above, the lumbar support is removably located on the frame.

According to another embodiment of the present invention, the chair with adjustable lumbar support height comprises a support base, a seat and the backrest as described in the above embodiments. The chair seat is connected with the supporting seat and the chair back. The supporting base is provided with a plurality of rollers. The chair back is provided with a frame, a covering body and a waist support part. The frame has a hollow portion. The waist rest part is positioned in the hollow part and can be connected with two opposite inner sides of the frame in a sliding way so as to change the height of the waist rest part on the frame. The covering body covers the hollow-out part and the waist rest part of the frame.

Therefore, through the framework, a user can adjust the height position of the waist support part by himself, so that the waist support part can be accurately abutted to the waist position expected by the user, and the time for generating fatigue feeling and waist soreness and back pain discomfort is prolonged.

The foregoing is merely illustrative of the problems to be solved, the technical solutions to the problems, the effects thereof, and the like, and the details of the present invention will be described in the following detailed description and the related drawings.

Drawings

FIG. 1 is a perspective view of a chair with adjustable lumbar height according to one embodiment of the present invention;

FIG. 2 is a perspective view of the chair back of FIG. 1 with the covering omitted;

FIG. 3A shows a partial enlarged view of the region M1 of FIG. 2;

FIG. 3B shows an exploded view of FIG. 3A;

FIGS. 4A-4B are schematic views illustrating the continuous operation of the second connecting portion of the lumbar support portion;

FIG. 5A is a perspective view of the chair of FIG. 1 with the lumbar height adjusted; and

fig. 5B illustrates a partial enlarged view of the region M2 of fig. 5A.

[ notation ] to show

10: chair (Ref. now to FIGS)

100: supporting seat

110: base body

120: shaft lever

130: roller wheel

200: chair back

210: frame structure

220: hollow-out part

221: inner side

230: guide part

231: external accessory

232: locking part

233: long and narrow groove

240: first connecting part

241: concave part

242: first rack interface

300: covering body

400: waist back part

410: support frame

411: concave part

420: containing groove

421: first guide groove

422: second guide groove

421L, 422L: direction of long axis

430: opening of the container

440: pad body

450: sliding member

451: cover body

452: sliding block

460: second connecting part

470: moving part

471: bump

472: second rack interface

473: body

480: push button part

481: inclined groove

481L: direction of long axis

482: positioning column

490: elastic component

500: armrest

600: chair seat

610: comfortable cushion

M1, M2: region(s)

B: bolt

D1: a first direction

D2: second direction

D3: third direction

D4: fourth direction

H1, H2: height

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

In the following description, numerous implementation-specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that these implementation details are not required in some embodiments of the invention and should not be used to limit the present disclosure. In addition, some conventional structures and components are shown in simplified schematic form in the drawings. In addition, the dimensions of the various elements in the drawings are not necessarily to scale, for the convenience of the reader.

Fig. 1 is a perspective view of a chair 10 with adjustable lumbar support height according to an embodiment of the present invention. Fig. 2 is a perspective view of the chair back 200 of fig. 1 without the cover 300. In the present embodiment, as shown in fig. 1 and 2, the chair 10 includes a support base 100, a chair back 200, two armrests 500 and a chair seat 600. The supporting base 100 includes a base 110, a shaft 120 and a plurality of rollers 130. The rollers 130 are respectively pivoted to the bottom of the base 110, and the shaft 120 is located at an end of the base 110 opposite to the rollers 130. The seat 600 is mounted on the shaft 120 of the support base 100 and has a comfort pad 610 thereon for the occupant. The armrests 500 are symmetrically disposed on the seat 600. The chair back 200 has a frame 210, a covering body 300 and a lumbar support 400. The frame 210 is connected to one side of the seat 600 and is located between the armrests 500. The frame 210 has a hollow 220. The lumbar support 400 is located within the hollow 220 and slidably connects two opposing inner sides 221 of the frame 210. The covering body 300 is laid on one surface of the frame 210 so as to cover the hollow portion 220 and the lumbar portion 400. The cover 300 is, for example, a mesh fabric with tension.

Fig. 3A illustrates a partial enlarged view of the region M1 of fig. 2. Fig. 3B illustrates an exploded view of fig. 3A. As shown in fig. 3A and 3B, in the present embodiment, more specifically, the chair back 200 further includes two guiding portions 230. The guide portions 230 are symmetrically formed on two opposite inner sides 221 of the frame 210, respectively. The lumbar support 400 includes a support 410, a pad 440, and two sliding members 450. The pad 440 is fixed to one surface of the bracket 410, and the pad 440 is located between the cover 300 and the bracket 410 (fig. 1). The sliding members 450 are respectively located at two opposite ends of the bracket 410, and each sliding member 450 is slidably engaged with one of the guide portions 230. In this way, the lumbar support portion 400 can move in the hollow portion 220 of the chair back 200, for example, to move up or down along the extending direction of the guide portions 230.

Furthermore, the backrest 200 further includes two first connecting portions 240. The first connecting portions 240 are symmetrically formed on two opposite inner sides 221 of the frame 210. The lumbar support portion 400 further includes two second connecting portions 460. The second connection portions 460 are respectively located at two opposite ends of the bracket 410. Each of the second connection portions 460 detachably abuts one of the first connection portions 240. In this way, after the lumbar support portion 400 is moved to a proper position, the lumbar support portion 400 can be clamped in the proper position by the mutual abutting of the first connection portion 240 and the second connection portion 460.

Further, each guiding portion 230 includes an outer attachment 231, two locking portions 232 and a narrow groove 233. An elongated groove 233 is formed at a long side of the external attachment 231. The two locking portions 232 are oppositely disposed on the outer fitting 231. Therefore, each external fitting 231 can be locked to the frame 210 by the locking parts 232, so that the elongated groove 233 is located between the frame 210 and the external fitting 231. As such, since the external attachment 231 can be removed from the frame 210, the lumbar support 400 can be detached from the frame 210, i.e., the lumbar support 400 is removably positioned on the frame 210.

In addition, the holder 410 is formed with a receiving groove 420 at each end thereof. The receiving groove 420 is used for receiving one of the second connecting portions 460. Each slider 450 includes a cover 451 and a slider 452. The cover body 451 can be fixed on the bracket 410 by bolts B to cover the corresponding receiving groove 420 and the second connecting portion 460. The slider 452 is disposed at an end of the cover 451 opposite to the pad 440 for slidably engaging with the elongated recess 233. More specifically, the accommodating groove 420 has a first guide groove 421 and a second guide groove 422 overlapped with each other. The long axis direction 421L of the first guide groove 421 and the long axis direction 422L of the second guide groove 422 are orthogonal to each other. The second guide groove 422 is located between the first guide groove 421 and the cover body 451.

For example, each first connecting portion 240 further includes a recess 241 and a first rack interface 242. Each of the concave portions 241 is recessed in one of the inner sides 221 of the frame 210 and faces the hollow portion 220, and the first rack interface 242 is located in the concave portion 241.

Each second connecting portion 460 includes a moving member 470 and a button portion 480, and the moving member 470 is slidably located on the bracket 410. In this embodiment, the moving member 470 is slidably located in the first guide groove 421. The button 480 is slidably located on the bracket 410 and pushes against the mover 470. In the present embodiment, the button portion 480 is slidably located in the second guiding groove 422 and located between the moving member 470 and the cover body 451. The button portion 480 has an inclined groove 481. The long axis direction 481L of the inclined groove 481 intersects the long axis direction 421L of the first guide groove 421 and the long axis direction 422L of the second guide groove 422. The moving member 470 includes a protrusion 471 of the body 473 and a second rack interface 472. The projection 471 is located on one side of the body 473. The protrusion 471 extends into the inclined groove 481 and is slidably confined in the inclined groove 481. The side of the body 473 facing away from the pad 440 also has a second rack interface 472. The second rack interface 472 is configured to directly engage the second rack interface 472 in the recess 241.

In addition, the lumbar support portion 400 further comprises two elastic members 490. Each elastic member 490 couples the bracket 410 and the button portion 480. For example, one end of each elastic element 490 is sleeved on the positioning column 482 of the button portion 480, and the other end is located in the concave portion 411 of the bracket 410. The elastic member 490 is used to push the second connection portion 460 back to the corresponding first connection portion 240.

It should be noted that, in the present embodiment, the lower side of the bracket 410 has two openings 430 disposed oppositely. Each button portion 480 is located in the receiving groove 420 and extends downward from the opening 430 thereof, so that the rider can smoothly move his/her hands around the rear of the seat back 200 to press the button portion 480 and adjust the posture of the lumbar support 400.

Fig. 4A to 4B respectively illustrate sequential operations of the second connecting portion 460 of the lumbar support portion 400. As shown in fig. 4A and 4B, when the user presses the button portion 480 toward the first direction D1 (e.g., upward), the button portion 480 pushes the protrusion 471 of the moving member 470 through the inclined groove 481, and the moving member 470 moves out of the recess 241 along a second direction D2 (e.g., right) orthogonal to the first direction D1, so that the second rack interface 472 starts to separate from the first rack interface 242. At this time, the button portion 480 compresses the elastic member 490 to allow the elastic member 490 to store a restoring elastic force. Therefore, since the lumbar support portion 400 is no longer fixed to the frame 210, the lumbar support portion 400 can slide on the guide portion 230 of the frame 210 through the slider 452, so that the user can lift the lumbar support portion 400 arbitrarily to change the height of the lumbar support portion 400 on the frame 210.

Fig. 5A is a perspective view of the seat 10 of fig. 1 with the lumbar height adjusted. Fig. 5B illustrates a partial enlarged view of the region M2 of fig. 5A. Conversely, as shown in fig. 5A and 5B, when the waist rest 400 is lifted from the original height H1 (fig. 1) to the proper height H2 (fig. 5A) and the user no longer presses the button 480, the resilient force of the resilient member 490 starts to push the button 480 in the third direction D3 (below), the protrusion 471 of the moving member 470 is pushed through the inclined groove 481, and the button 480 moves the moving member 470 into the recess 241 in the fourth direction D4 (e.g., left) orthogonal to the third direction D3 until the first rack interface 242 directly engages the second rack interface 472 in the recess 241. Therefore, the lumbar support portion 400 can be fixed to the frame 210 again.

Therefore, through the framework, a user can adjust the height position of the waist support part by himself, so that the waist support part can be accurately abutted to the waist position expected by the user, and the time for generating fatigue feeling and waist soreness and back pain discomfort is prolonged.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.

Claims (10)

1. A chair back for a chair, comprising:

a frame having a hollow portion;

the waist rest part is positioned in the hollow part and can be connected with two opposite inner sides of the frame in a sliding way so as to change the height of the waist rest part on the frame; and

the covering body covers the hollow-out part and the waist rest part of the frame.

2. The chair back of claim 1, wherein the frame includes guide portions formed at the two opposite inner sides of the frame, respectively; and

the waist rest part comprises a bracket, a cushion body and two sliding blocks, the cushion body is fixedly connected on the bracket and is positioned between the covering body and the bracket, the sliding blocks are respectively positioned at two opposite ends of the bracket, and each sliding block can be glidingly connected with one of the guiding parts.

3. The chair back of claim 2, wherein the frame further comprises two first connectors located on the two opposing inner sides of the frame; and

the waist support part further comprises two second connecting parts and two elastic components, the second connecting parts are oppositely and respectively positioned on the bracket, each second connecting part is detachably abutted against one of the first connecting parts, and each elastic component is coupled with one of the bracket and the second connecting parts and used for moving the second connecting parts to the corresponding first connecting parts.

4. The chair back of claim 3, wherein each of the first connectors further comprises a recessed portion formed in one of the two opposing inner sides of the frame and a first rack interface located in the recessed portion; and

each second connecting portion comprises second rack interfaces respectively located at two opposite ends of the bracket, and each second rack interface directly engages with the first rack interface in the recess.

5. The chair back of claim 4, wherein each of the second connecting portions comprises:

a movable member slidably disposed on the bracket, wherein the second rack interface is disposed on a surface of the movable member for directly engaging the second rack interface in the recess; and

a button part slidably disposed on the bracket and pushing against the moving part, wherein the elastic component is coupled with the bracket and the button part,

when the button part moves and the moving part moves out of the concave part, the button part compresses the elastic component, and the second rack interface is separated from the first rack interface, so that the waist rest part can relatively slide on the guide part of the frame through the sliding block.

6. The chair back of claim 5, wherein each of the two opposite ends of the bracket is formed with a first guide slot and a second guide slot overlapping each other, a long axis direction of the first guide slot is orthogonal to a long axis direction of the second guide slot, the lumbar support portion further comprises two covers, each of the covers removably covering one of the second guide slots and being connected to one of the sliders,

the second guide groove is positioned between the first guide groove piece and the cover body, the moving piece is positioned in the first guide groove in a sliding manner, and the button part is positioned in the second guide groove in a sliding manner and positioned between the moving piece and the cover body.

7. The chair back of claim 6, wherein the button portion has a slanted groove having a long axis direction intersecting the long axis direction of the first channel and the long axis direction of the second channel; and

the moving member has a protrusion slidably disposed in the inclined groove, wherein when the button portion is pressed along a first direction, the button portion pushes the protrusion of the moving member through the inclined groove, so that the moving member moves out of the recess along a second direction, wherein the first direction and the second direction are orthogonal to each other.

8. The chair back of claim 7, wherein the underside of the bracket has an opening, the button portion projecting downwardly from the opening.

9. The chair back of claim 1, wherein the lumbar support is removably positioned on the frame.

10. A seat with adjustable lumbar support height, comprising:

a support seat having a plurality of rollers;

the chair back of any one of claims 1-9; and

the chair seat is connected with the supporting seat and the chair back.

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