CN114698967A - Adjustable waist rest mechanism - Google Patents
Adjustable waist rest mechanism Download PDFInfo
- Publication number
- CN114698967A CN114698967A CN202210437048.3A CN202210437048A CN114698967A CN 114698967 A CN114698967 A CN 114698967A CN 202210437048 A CN202210437048 A CN 202210437048A CN 114698967 A CN114698967 A CN 114698967A
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- adjusting rod
- supporting
- base
- lumbar support
- waist
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- 230000007246 mechanism Effects 0.000 title claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 4
- 230000000670 limiting effect Effects 0.000 claims description 14
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 description 10
- 230000006872 improvement Effects 0.000 description 9
- 230000007306 turnover Effects 0.000 description 6
- 208000034656 Contusions Diseases 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000009519 contusion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
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- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
The invention discloses an adjustable lumbar support mechanism, which comprises a base and a lumbar support, wherein the base is arranged on a chair back frame; the base is provided with a first adjusting rod which is transversely arranged and can rotate around the central axis of the base, and the surface of the first adjusting rod is provided with a plurality of supporting parts which extend along the circumferential direction and are in stepped transition; the surface of the first adjusting rod is provided with a plurality of connecting parts extending along the circumferential direction of the first adjusting rod, and the connecting parts can move along the circumferential direction of the first adjusting rod, so that the connecting parts are smoothly connected with two adjacent supporting parts and are shielded by the supporting parts; the top of the waist rest is provided with a waist rest seat, the upper part of the waist rest seat is hinged on the base so that the waist rest can rotate back and forth, and a first elastic reset structure is arranged between the base and the waist rest seat and used for driving the waist rest to rotate forwards; the lower part of the lumbar support has a bearing part which can be supported on the supporting part and is matched with the shape. The waist-waist stepless adjusting device has the advantages that the adjusting gear levels are clear, multi-gear adjustment can be changed into stepless adjustment during adjustment, and the waist-pause feeling of a user is reduced.
Description
Technical Field
The invention relates to a lumbar support mechanism, in particular to an adjustable lumbar support mechanism.
Background
Office chairs are provided with various mechanism components such as headrests, lumbar supports, etc. for a user group working at office desk. Among them, the support, comfort and adjustability of the lumbar support mechanism to the user's waist are important factors for the user's experience.
For example, patent application publication No. CN211092855U discloses a seat lumbar support adjusting structure, which includes a lumbar support frame and a support frame arranged in front and back, and a lumbar support lifting adjusting unit and a lumbar support front and back adjusting unit are arranged between the lumbar support frame and the support frame; the waist rest lifting adjusting unit comprises a vertical sliding groove arranged on the supporting frame and a sliding piece which is connected to the rear part of the waist rest frame and can slide and be positioned in the vertical sliding groove; wherein the sliding piece is hinged with the back of the waist rest frame; the waist back front-back adjusting unit comprises an eccentric wheel which is abutted against the back surface of the waist back frame, the eccentric wheel is rotatably connected with the sliding piece through a rotating shaft of the eccentric wheel, and the distance between the rotating shaft and the back surface of the waist back frame is adjusted through rotating the rotating shaft of the eccentric wheel so as to realize front-back adjustment of the waist back frame.
For another example, patent application publication No. CN208957322U discloses a lumbar support adjusting mechanism, which includes a lumbar support and a supporting frame, and further includes: the mounting seat is fixedly arranged on the support frame, and a first mounting groove is formed in the mounting seat; the turnover support comprises a first support and a turnover plate arranged at the rear end of the first support, the turnover plate is arranged in the first mounting groove, one of the upper end and the lower end of the turnover plate rotates around the first mounting groove, and the front end of the first support is connected with the waist rest; the adjusting block is arranged in the first mounting groove, and the waist rest can be adjusted forwards and backwards by adjusting the rotating angle of the turnover support through sliding the adjusting block up and down; the mounting cover plate covers the outer side of the turnover plate and is fixedly connected with the mounting seat, and the first support penetrates through the mounting cover plate.
The waist rest structures of the two chairs have the problems of complex structure and easy occurrence of mechanical failure; the supporting force for the waist is hard, and a certain buffering effect is not achieved, so that the waist is easy to fatigue; in addition, the problems of unobvious gear level adjustment and small adjustment amplitude exist.
Disclosure of Invention
The invention aims to provide an adjustable waist support mechanism, which has clear adjustment gear level, can change multi-gear adjustment into stepless adjustment during adjustment and reduce the waist pause and contusion of a user.
The invention is realized by the following technical scheme.
An adjustable lumbar support mechanism comprises a base and a lumbar support which are arranged on a chair back frame; the base is provided with a first adjusting rod which is transversely arranged and can rotate around the central axis of the base, and the surface of the first adjusting rod is provided with a plurality of supporting parts which extend along the circumferential direction and are in step transition; the surface of the first adjusting rod is provided with a plurality of connecting parts extending along the circumferential direction of the first adjusting rod, and the connecting parts can move along the circumferential direction of the first adjusting rod, so that the connecting parts are smoothly connected with two adjacent supporting parts and are shielded by the supporting parts; the top of the waist rest is provided with a waist rest seat, the upper part of the waist rest seat is hinged on the base so that the waist rest can rotate back and forth, and a first elastic reset structure is arranged between the base and the waist rest seat and used for driving the waist rest to rotate forwards; the lower part of the waist rest seat is provided with a bearing part which can be supported on the supporting part and is adaptive to the shape.
As a further improvement of the invention, a second adjusting rod is inserted in the first adjusting rod, extends out from one end of the first adjusting rod and can rotate around the central axis of the second adjusting rod relative to the first adjusting rod; the first adjusting rod is provided with a plurality of limiting holes which extend along the circumferential direction and are longer than the connecting part; the joint part is arranged on the second adjusting rod and penetrates through the limiting hole.
As a further improvement of the invention, the second adjusting rod can move axially relative to the first adjusting rod, and the width of the limiting hole is larger than that of the joint part; the side surface of the joining part is provided with an inserting structure, the side surface of the supporting part is provided with two positioning slots which are in clamping fit with the inserting structure, and the positions of the two adjacent supporting parts which are smoothly joined with the joining part and the positions of the joining part which is shielded by the supporting part respectively correspond to the positions of the joining part.
As a further improvement of the invention, a second elastic reset structure is arranged between the first adjusting rod and the second adjusting rod and used for driving the inserting structure to be in clamping fit with the positioning slot.
As a further improvement of the invention, two support portions are provided on the first adjustment lever and spaced from each other, and the engagement portion is located between the two support portions.
As a further improvement of the invention, upright support columns are arranged at the bottom of the base on the left and right sides of the supporting part and the joint part, and the top ends of the support columns are supported on the first adjusting rod.
As a further improvement of the invention, a vertical supporting rod capable of moving up and down is arranged at the center of the top end of the supporting column, and a third elastic reset structure is arranged in the supporting column to drive the supporting rod to move up; the surface of the first adjusting rod is provided with a plurality of positioning grooves which are concave spherical surfaces and used for being clamped and matched with the supporting rod when the supporting part supports the bearing part.
As a further improvement of the invention, the surface of the first adjusting rod is provided with a sliding groove which extends along the circumferential direction and connects two adjacent positioning grooves; the groove depth of the center of the positioning groove is larger than that of the sliding groove, and the top end of the supporting rod is clamped into the sliding groove when the supporting rod moves downwards to the lowest position.
As a further improvement of the invention, the diameter of the positioning groove is larger than that of the supporting rod.
As a further improvement of the invention, the first adjusting rod penetrates through the left side part and the right side part of the base, and the first adjusting rod is provided with a limiting structure which is abutted against the side parts and is used for preventing the first adjusting rod from moving along the axial direction of the first adjusting rod.
The invention has the beneficial effects that:
according to the invention, the multiple support parts with the ladder structures are arranged on the first adjusting rod, so that the multi-gear rotation adjustment of the waist rest can be realized, and the engagement parts are arranged to smoothly engage two adjacent support parts, so that the stepless adjustment of the waist of a user against the waist rest can be realized, and the waist of the user can be prevented from feeling pause and contusion.
Drawings
The preferred embodiments of the present invention will hereinafter be described in detail to facilitate understanding of the objects and advantages of the invention, with reference to the accompanying drawings, in which:
figure 1 is a front view of the lumbar support mechanism of the present application;
figure 2 is a cross-sectional view of the lumbar support mechanism of the present application;
FIG. 3 is a front view of the base;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
FIG. 5 is a perspective view of the first adjustment lever from one perspective;
FIG. 6 is a perspective view of the first adjustment lever from another perspective;
FIG. 7 is a schematic cross-sectional view of the first adjustment lever, the second adjustment lever, and the support post.
Detailed Description
The invention is explained in more detail below with reference to the drawings and exemplary embodiments.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.
Referring to fig. 1-7, an adjustable lumbar support mechanism comprises a base 12 and a lumbar support 21, wherein the base 12 is arranged on a chair back frame 11, the chair back frame 11 is formed by extending a section of the rear end of a chair seat backwards and then upwards, and the base 12 is arranged in the middle of the chair back frame 11. The base 12 is provided with a first adjusting rod 3 transversely arranged, the first adjusting rod 3 can rotate around the central axis of the first adjusting rod, the left end and the right end of the first adjusting rod are respectively provided with a rotary handle 3a, and the left hand and the right hand of a user can hold the corresponding rotary handle 3a to rotate and adjust the first adjusting rod 3.
The surface of the first adjusting rod 3 is provided with a plurality of supporting parts 31 which extend along the circumferential direction and are in stepped transition, and the supporting parts 31 are formed by radial protrusions on the surface of the first adjusting rod 3 and are in an integral structure with the first adjusting rod 3. The surface of the first adjusting rod 3 is further provided with a plurality of engaging parts 41 extending along the circumferential direction of the first adjusting rod 3, and the engaging parts 41 can move along the circumferential direction of the first adjusting rod 3, so that the engaging parts 41 smoothly engage with two adjacent supporting parts 31 and are shielded by the supporting parts 31. The engaging portion 41 is also formed by radially protruding the surface of the first adjusting lever 3, and presents a ramp-shaped structure, and both ends of the engaging portion 41 are flush with the two adjacent support portions 31 to be engaged, respectively. The number of the engagement portions 41 is one less than that of the support portions 31, for example, in the present embodiment, the number of the support portions 31 is three, and the number of the engagement portions 41 is two. When the engaging portion 41 smoothly engages two adjacent support portions 31 in a side view, the support portions 31 and the engaging portion 41 as a whole assume an annular structure circumferentially surrounding the first adjustment lever 3, and the width of the annular structure gradually decreases in the circumferential direction. When the engagement portion 41 is blocked by the support portion 31, only a stepped structure in which the plurality of support portions 31 circumferentially surround the first adjustment lever 3 is present as a whole.
The top of the lumbar support 21 is provided with a lumbar support seat 22, the upper part of the lumbar support seat 22 is hinged on the base 12, so that the lumbar support 21 can rotate back and forth, the lower part of the lumbar support seat 22 is provided with a bearing part 221 which can be supported on the support part 31 and is adaptive to the shape, and a first elastic resetting structure 122 is arranged between the base 12 and the lumbar support seat 22 and is used for providing a buffer effect when the bearing part 221 presses the support part 31.
Specifically, the upper portion of the base 12 has a rotating shaft 121 transversely disposed, the upper portion of the lumbar support seat 22 is sleeved on the rotating shaft 121, the first elastic reset structure 122 is a torsion spring, which is sleeved on the rotating shaft 121, and two ends of the torsion spring respectively support the base 12 and the lumbar support seat 22. When the first elastic reset structure 122 is in a natural state, the bearing part 221 is separated from the supporting part 31 of the first adjusting rod 3; when the waist of the user leans against the lumbar support 21 and leans back, the first elastic restoring structure 122 is gradually compressed to perform an elastic buffering function, so as to improve the comfort of the waist until the bearing part 221 is supported on the supporting part 31.
Because the plurality of support parts 31 on the first adjusting rod 3 are in a step-shaped structure, the waist rest 21 can be adjusted in multiple gears according to the number of the support parts 31. When the user does not lean on the lumbar support 21, the first adjustment lever 3 is rotationally adjusted such that the desired support portion 31 faces the bearing portion 221. When the waist of the user is abutted against the waist support 21 and the bearing part 221 is supported on the support part 31, and the position of the waist support 21 is sensed while the first adjusting lever 3 is rotated, a relatively strong jerk feeling is generated when the user rotates to shift the gears, which causes discomfort to the waist of the user.
Therefore, in this case, the user adjusts the engaging portion 41 to make the engaging portion 41 smoothly engage with two adjacent supporting portions 31, so as to present a multi-gear adjusting process as stepless adjustment, and then rotates the first adjusting lever 3 while sensing the position of the lumbar support 21, so as to avoid the feeling of jerking, and when the position of the lumbar support 21 is adjusted, the engaging portion 41 is adjusted again, so that the engaging portion 41 is shielded by the supporting portions 31, so as to complete the final adjustment.
It should be noted that the thickness of the supporting portion 31 is not changed along the circumferential direction, so that the state when the supporting portion 31 supports the bearing portion 221 is stable, and the first adjusting lever 3 is prevented from automatically rotating around the central axis thereof due to uneven stress.
In this application, first regulation pole 3 interpolation is equipped with second regulation pole 4, and second regulation pole 4 stretches out from the one end of first regulation pole 3 to can be relative first regulation pole 3 around self axial rotation, the outer end that second regulation pole 4 stretches out from first regulation pole 3 is provided with rotatory handle 4a, and the size of this rotatory handle is less than first rotatory handle 3a of adjusting pole 3, and the user of being convenient for sits and can distinguish both under the unable condition of seeing of regulation on the chair. The first adjustment lever 3 has a plurality of stopper holes 42 extending in the circumferential direction and having a length greater than that of the engagement portion 41, and the engagement portion 41 is provided on the second adjustment lever 4 and passes through the stopper holes 42. The user rotates the second adjustment lever 4 relative to the first adjustment lever 3 about its central axis by rotating the second adjustment lever 4, so that the engagement portion 41 moves circumferentially along the stopper hole 42. The limiting hole 42 is used for allowing the connection part 41 to move circumferentially relative to the supporting part 31 and also has a limiting effect, when the connection part 41 is respectively abutted against two ends of the limiting hole 42, the connection part 41 is respectively in smooth connection with two adjacent supporting parts 31 and is in two states shielded by the supporting parts 31, the operation of a user is facilitated, and the user can adjust the second adjusting rod 4 to the bottom by rotating the second adjusting rod in the forward and reverse directions.
After the user adjusts the second adjusting rod 4 by rotation, the relative position of the linking part 41 and the supporting part 31 needs to be kept stable, and further, the second adjusting rod 4 can move along the self axial direction relative to the first adjusting rod 3, the width of the limiting hole 42 is greater than the linking part 41, the side of the linking part 41 is provided with the inserting structure 411, the side of the supporting part 31 is provided with two positioning slots 311 matched with the inserting structure 411 in a clamping manner, and the positions of two adjacent supporting parts 31 and the position of the linking part 41 shielded by the supporting part 31 are smoothly linked up corresponding to the linking part 41 respectively. When a user adjusts the positioning device, the second adjusting rod 4 is firstly pushed and pulled to separate the inserting structure 411 of the connecting portion 41 from one of the positioning slots 311, then the second adjusting rod 4 is rotated to the bottom until the second adjusting rod cannot rotate relative to the first adjusting rod 3, and then the second adjusting rod 4 is pushed and pulled in a reverse direction to clamp the inserting structure 411 into the other positioning slot 311.
In addition, in order to avoid the separation of the inserting structure 411 and the positioning slot 311 under an unexpected situation, a second elastic resetting structure 43 is arranged between the first adjusting rod 3 and the second adjusting rod 4 and used for driving the inserting structure 411 and the positioning slot 311 to be in clamping fit. More specifically, a circle of radially protruding flanges 32 are arranged on the inner wall of the first adjusting rod 3, the inner end of the second adjusting rod 4 in the first adjusting rod 3 penetrates through the flanges 32, and the second elastic resetting structure 43 is a pressure spring and is sleeved on the second adjusting rod 4 and supported between the inner end of the second adjusting rod 4 and the flanges 32. When a user needs to adjust the connecting portion 41, the user holds the rotating handle 4a to push the inserting structure 411 and the positioning slot 311 inward, at this time, the second elastic resetting structure 43 is in a compressed state, then the rotating handle 4a is rotated to rotate the second adjusting rod 4 to the bottom, and then the rotating handle 4a is released, the second elastic resetting structure 43 can drive the inserting structure 411 to be clamped into another positioning slot 311, so that the adjustment of the connecting portion 41 is completed.
In this embodiment, the support portions 31 are disposed in two and are spaced left and right at the center of the first adjustment lever 3, the engagement portion 41 is disposed in one and between the two support portions 31 spaced left and right, and the overall structure of the support portions 31 and the engagement portion 41 is symmetrical left and right, so that the support portions 31 are uniformly stressed left and right when supporting the bearing portion 221, and the stability of the support is improved. Further, a gap is formed between the engagement portion 41 and the support portions 31 on both the left and right sides, so that frictional resistance caused by contact can be avoided.
The bottom of the base 12 is provided with two bilaterally symmetrical support pillars 123, the support pillars 123 are vertically arranged and located on two sides of the support portion 31 and the linking portion 41, and the top ends of the support pillars 123 are supported on the first adjusting rod 3, so that the first adjusting rod 3 is prevented from being bent and deformed.
When the user leans against the waist support 21 to adjust the gear, the rotation of the first adjusting rod 3 cannot be observed, and the engaging portion 41 smoothly engages with the two adjacent supporting portions 31 to perform stepless adjustment, so that the first adjusting rod 3 is easily rotated excessively or excessively, and the engaging portion 41 is drawn out from between the supporting portion 31 and the bearing portion 221 to form a gap when the user adjusts the second adjusting rod 4 after completing gear adjustment, thereby allowing the user to feel frustration at the waist. Therefore, the supporting rod 124 which is vertical and can move up and down is arranged at the center of the top end of the supporting column 123, the third elastic reset structure 125 is arranged in the supporting column 123 to drive the supporting rod 124 to move up, and the surface of the first adjusting rod 3 is provided with a plurality of positioning grooves 33 which are concave spherical surfaces and used for being clamped and matched with the supporting rod 124 when the supporting part 31 supports the bearing part 221. Therefore, when a user switches a gear, the supporting rod 124 is clamped into the corresponding positioning slot 33, and the user obviously has hand feeling difference when rotating the first adjusting rod 3, so that the gear adjustment can be accurately completed without observation, and the waist is prevented from generating frustration.
More specifically, the third elastic resetting structure 125 is a tension spring, which is sleeved on the portion of the supporting rod 124 located in the supporting column 123, and two ends of the third elastic resetting structure are respectively connected to the top end of the supporting column 123 and the bottom end of the supporting rod 124.
The surface of the first adjusting rod 3 is provided with a sliding groove 34 which extends along the circumferential direction and is connected with two adjacent positioning grooves 33, the top end of the supporting rod 124 is spherical, the bottom of the sliding groove 34 is arc-shaped and is matched with the top end of the supporting rod 124, and the width of the sliding groove 34 is basically the same as the diameter of the top end of the supporting rod 124, so that the top end of the supporting rod 124 slides stably along the sliding groove 34. The groove depth of the center of the positioning groove 33 is greater than the groove depth of the sliding groove 34, the part of the supporting rod 124, which is located outside the supporting column 123, is provided with a limiting structure 1241 which can be abutted against the top end of the supporting column 123, when the supporting rod 124 moves downwards to the limiting structure abutted against the top end of the supporting column 123, namely, the lowest position of the supporting rod 124, at this time, the top end of the supporting rod 124 is clamped into the sliding groove 34, so that the top end of the supporting rod 124 cannot slide to the surface of the first adjusting rod 3, and the first adjusting rod 3 cannot continue to rotate after rotating to the minimum gear or the maximum gear.
The foregoing the effect of constant head tank 33 and bracing piece 124 is the precision that improves the gear and adjust, on this basis, in this application, the diameter of constant head tank 33 is greater than the diameter of bracing piece 124, when the user rotates first regulation pole 3 and adjusts certain gear, even the top of bracing piece 124 does not support to the center department of constant head tank 33, as long as the top of bracing piece 124 falls into the within range of constant head tank 33, even the user loosens first regulation pole 3 this moment, under the elasticity of third elasticity reset structure 125 orders, the top of bracing piece 124 can be to the center department slip on constant head tank 33 is the tank bottom of sphere, accomplish the gear through automatic locking and adjust, make the user use more convenient.
The first adjustment lever 3 penetrates both the left and right side portions 126 of the base 12, and the first adjustment lever 3 has a stopper structure 3c abutting against the side portions to prevent the first adjustment lever 3 from moving in the axial direction thereof, thereby ensuring that the support portion 31 can stably support the support portion 221.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An adjustable lumbar support mechanism comprises a base and a lumbar support which are arranged on a chair back frame; the base is provided with a first adjusting rod which is transversely arranged and can rotate around the axial direction of the base, and the surface of the first adjusting rod is provided with a plurality of supporting parts which extend along the circumferential direction and are in stepped transition; the surface of the first adjusting rod is provided with a plurality of connecting parts extending along the circumferential direction of the first adjusting rod, and the connecting parts can move along the circumferential direction of the first adjusting rod, so that the connecting parts are smoothly connected with two adjacent supporting parts and are shielded by the supporting parts; the top of the waist rest is provided with a waist rest seat, the upper part of the waist rest seat is hinged on the base so that the waist rest can rotate back and forth, and a first elastic reset structure is arranged between the base and the waist rest seat and used for driving the waist rest to rotate forwards; the lower part of the waist rest seat is provided with a bearing part which can be supported on the supporting part and is adaptive to the shape.
2. The adjustable lumbar support mechanism of claim 1, wherein a second adjusting lever is inserted into said first adjusting lever, said second adjusting lever extending from one end of said first adjusting lever and being rotatable axially relative to said first adjusting lever about itself; the first adjusting rod is provided with a plurality of limiting holes which extend along the circumferential direction and are longer than the connecting part; the joint part is arranged on the second adjusting rod and penetrates through the limiting hole.
3. The adjustable lumbar support mechanism according to claim 2, wherein the second adjusting rod is axially movable relative to the first adjusting rod along the second adjusting rod, and the width of the limiting hole is larger than that of the engaging portion; the side surface of the joining part is provided with an inserting structure, the side surface of the supporting part is provided with two positioning slots which are in clamping fit with the inserting structure, and the positions of the two adjacent supporting parts which are smoothly joined with the joining part and the positions of the joining part which is shielded by the supporting part respectively correspond to the positions of the joining part.
4. The adjustable lumbar support mechanism according to claim 3, wherein a second elastic reset structure is disposed between the first adjusting rod and the second adjusting rod for driving the inserting structure to be engaged with the positioning slot.
5. An adjustable lumbar support mechanism according to any of claims 1-4, wherein there are two and spaced apart supports on said first adjustment bar, said engagement portion being located between the two supports.
6. An adjustable lumbar support mechanism according to claim 1, wherein upright support posts are provided on the bottom of the base on the left and right sides of the support and engagement portions, the top ends of the support posts being supported on the first adjustment bar.
7. The adjustable lumbar support mechanism according to claim 1, wherein a support rod which is vertical and can move up and down is arranged at the center of the top end of the support column, and a third elastic reset structure is arranged in the support column to drive the support rod to move up; the surface of the first adjusting rod is provided with a plurality of positioning grooves which are concave spherical surfaces and used for being clamped and matched with the supporting rod when the supporting part supports the bearing part.
8. The adjustable lumbar support mechanism of claim 7, wherein the surface of said first adjustment lever is provided with a sliding groove extending in a circumferential direction and connecting two adjacent positioning grooves; the groove depth of the center of the positioning groove is larger than that of the sliding groove, and the top end of the supporting rod is clamped into the sliding groove when the supporting rod moves downwards to the lowest position.
9. The adjustable lumbar support mechanism of claim 8, wherein said positioning slot has a diameter greater than a diameter of the support rod.
10. The adjustable lumbar support mechanism of claim 1, wherein said first adjustment bar extends through both left and right side portions of said base, and said first adjustment bar has a stop structure thereon that abuts against said side portions to prevent said first adjustment bar from moving axially thereof.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437048.3A CN114698967B (en) | 2022-04-25 | 2022-04-25 | Adjustable waist rest mechanism |
| PCT/CN2022/135746 WO2023207089A1 (en) | 2022-04-25 | 2022-12-01 | Adjustable waist rest mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437048.3A CN114698967B (en) | 2022-04-25 | 2022-04-25 | Adjustable waist rest mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114698967A true CN114698967A (en) | 2022-07-05 |
| CN114698967B CN114698967B (en) | 2023-10-24 |
Family
ID=82175228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210437048.3A Active CN114698967B (en) | 2022-04-25 | 2022-04-25 | Adjustable waist rest mechanism |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114698967B (en) |
| WO (1) | WO2023207089A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023207089A1 (en) * | 2022-04-25 | 2023-11-02 | 安吉瑞宝家具有限公司 | Adjustable waist rest mechanism |
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| CN213216127U (en) * | 2020-06-05 | 2021-05-18 | 恒林家居股份有限公司 | Seat and back of chair thereof |
| CN213247868U (en) * | 2020-09-30 | 2021-05-25 | 浙江胜途家具科技有限公司 | Waist rest adjusting device and seat |
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| CN114698967B (en) * | 2022-04-25 | 2023-10-24 | 浙江瑞尚智能家居有限公司 | Adjustable waist rest mechanism |
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2022
- 2022-04-25 CN CN202210437048.3A patent/CN114698967B/en active Active
- 2022-12-01 WO PCT/CN2022/135746 patent/WO2023207089A1/en unknown
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| CN101108049A (en) * | 2006-07-20 | 2008-01-23 | 周国卿 | Improved structure for a chair |
| KR100836344B1 (en) * | 2006-12-04 | 2008-06-09 | 기아자동차주식회사 | A variable lumbar supporting apparatus for a vehicle's seat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023207089A1 (en) * | 2022-04-25 | 2023-11-02 | 安吉瑞宝家具有限公司 | Adjustable waist rest mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114698967B (en) | 2023-10-24 |
| WO2023207089A1 (en) | 2023-11-02 |
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