CN222171704U

CN222171704U - An ergonomic waist support component

Info

Publication number: CN222171704U
Application number: CN202420585724.6U
Authority: CN
Inventors: 程军; 刘拥华; 袁世冬; 刘洋; 郑捷; 徐进
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2024-03-25
Filing date: 2024-03-25
Publication date: 2024-12-17
Anticipated expiration: 2034-03-25

Abstract

The utility model provides a waist support component which accords with human engineering, comprising a chair seat used for supporting human buttocks and a waist rest used for supporting human waist, wherein the waist rest is rotationally connected to the chair seat, the waist rest is in a sitting posture state and a lying posture, the waist rest of the waist support component is directly rotationally connected to the chair seat, when the waist rest rotates, a rotation connection point of the waist rest and the chair seat is kept motionless, the waist rest and the chair seat cannot generate relative displacement, the waist rest can effectively rotate more, the rotation angle is large, the waist rest can greatly change towards, and the waist rest can rotate from basically forward to basically upwards, so that the waist rest can support the waist from bottom to top just in the human waist position in the lying support state, the waist rest is not left or is not sufficiently inclined to have poor support effect, as in the prior waist rest, and when the waist rest rotates, the waist rest is directly rotationally connected with the chair seat, the lower end of the waist rest cannot be lifted relatively to the chair seat, and the human back cannot be pressed.

Description

Waist supporting component conforming to ergonomics

Technical Field

The utility model relates to the field of furniture, in particular to a waist support component which accords with ergonomics.

Background

The existing seat has more complete functions, can provide sitting and lying functions, can realize the function switching between sitting and lying by tilting the chair back, has complete functions, cannot explain the excellent performance of the seat, judges the maximum standard or comfort of the seat, and is required to provide comfort conforming to the ergonomics.

In the prior art, the chair back has the same overall angle when leaning back, and the support required by the waist of a user is different in lying and sitting postures, while in the prior art, the chair back has the problem that the support in lying postures and sitting postures is difficult to be completed due to the angle problem of the chair back, and the support effect on the waist is poor in lying postures, while in the dual-back chair, if the waist support is in non-rotating connection with the back support, the effect is the same as that of the single chair back, if the waist support is in rotating connection with the back support, the waist support rotates too much, the lower end of the waist support is raised relative to the seat support, so that the waist cannot be supported, and the waist can not be well supported even if the waist support is in rotating connection with the back support, and the inclination angle of the waist support of the chair back is small, such as that of the chair back support of Chinese patent 202320935281.4 is not easy to support the waist, but the problem of supporting the waist of a human body more comfortable body can not be solved.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a waist support assembly conforming to human engineering, which comprises a seat support for supporting buttocks of a human body and a waist support for supporting the waist of the human body, wherein the waist support is rotatably connected to the seat support, has a sitting posture state and a lying posture, is directly rotatably connected to the seat support, when the waist support rotates, a rotation connection point of the waist support and the seat support is kept motionless, the waist support and the seat support cannot generate relative displacement, the waist support can effectively rotate more, the rotation angle is large, the waist support can greatly change towards the front direction, the waist support can basically rotate from front to basically upwards, the waist support can exactly support the waist from bottom to top in the waist position of the human body in the lying support state, the waist support is not left empty like the existing waist support or has poor supporting effect due to being inclined to be not horizontal, and the lower end of the waist support cannot be lifted relative to the seat support greatly pressed by the human body when the waist support rotates.

The technical scheme of the utility model is realized as follows:

An ergonomic lumbar support assembly comprising:

A seat support configured to support buttocks of a human body;

The waist support piece is configured to support the waist of a human body and is rotatably connected to the seat support piece;

The waist support member has a sitting posture support state in which the waist support member faces forward and a lying support state in which the front portion of the waist support member is positioned below the rear portion of the waist support member, and when the sitting posture support state is switched to the lying support state, the rear portion of the waist support member rotates downward relative to the front portion of the waist support member, and in which the waist support member faces upward and supports the waist of a human body from bottom to top.

When the sitting posture supporting state is switched to the lying supporting state, a plurality of waist supporting pieces can be realized, the rear parts of the waist supporting pieces rotate downwards relative to the front parts of the waist supporting pieces, and the difference from the prior art is that the waist supporting pieces of the waist supporting assembly are directly connected to the seat supporting pieces in a rotating way, when the waist supporting pieces rotate, the rotating connection points of the waist supporting pieces and the seat supporting pieces are kept motionless, the waist supporting pieces and the seat supporting pieces cannot generate relative displacement, the waist supporting pieces can effectively rotate more, the rotating angle is large, the waist supporting pieces can change towards a large extent, and the waist supporting pieces can rotate from the basic forward to the basic upward, so that the waist supporting pieces can support the waist from the lower part to the upper part just in the human waist position in the lying supporting state, and the waist supporting effect is poor because the waist supporting pieces are left or are not inclined enough horizontally like the prior art.

And the waist support piece is directly connected with the seat support piece in a rotating way, and when the waist support piece rotates, the lower end of the waist support piece is not lifted far relative to the seat support piece, and the back of a human body is not pressed.

Preferably, the lumbar support is inclined at an angle of 13-20 ° relative to the ground in the lying support condition. The inclination angle of the waist support piece relative to the ground in the lying support state is obviously smaller than that of the waist support piece in the existing seat, so that the inclination angle of the waist support piece relative to the vertical plane is larger, and the waist support piece faces more nearly upwards to support the waist of a human body.

Preferably, in the sitting posture supporting state, the included angle between the waist supporting member and the seat supporting member is 115-120 degrees, and in the lying supporting state, the included angle between the waist supporting member and the seat is 158-165 degrees. When supporting the state from the position of sitting to lying, the contained angle grow of waist support piece and seat support piece, under the position of sitting support state, the contained angle of waist support piece and seat support piece is similar with conventional seat, but under the position of lying support, the contained angle of waist support piece and seat support piece is obviously bigger, and waist support piece is more inclined, and waist support piece's orientation deflection orientation is upwards, and is more reasonable to the bearing of human waist like this, and the user can obtain more comfortable experience.

Preferably, the rotation angle of the lumbar support is 43-50 °. The rotation angle of the waist support piece is larger than that of the existing seat waist support piece, so that the waist support piece is inclined more reasonably, the waist support piece is used for supporting the waist of a human body in a more optimal posture, and the comfort is improved.

Preferably, the rear end of the seat support is fixedly connected with a vertical rotating frame, the rotating frame protrudes upwards from the upper surface of the seat support, and the waist support is rotatably connected to the rotating frame. The waist support piece is connected to the rotating frame, but not directly connected to the seat support piece, the height of the waist support piece is raised, the waist support piece has the height similar to that of an existing seat in a sitting posture support state, the due function is achieved, meanwhile, the waist support piece can not interfere with the seat support piece when rotating, and the seat support piece can be effectively avoided.

Preferably, the lower end of the waist support member is suspended, and when the sitting posture support state is switched to the lying support state, the lower end of the waist support member moves from back to front and is close to the seat support member, and the distance between the lower end of the waist support member and the seat support member is reduced. Namely, the rotation connection point of the waist support piece and the rotating frame is positioned in the middle of the waist support piece, when the waist support piece rotates from a sitting posture support state to a lying support state, the distance between the waist support piece and the seat support piece is reduced, so that the transition between the seat support piece and the waist support piece is smoother, the waist support piece supports the waist more reasonably, and the waist support piece accords with ergonomics.

Preferably, the seat support is curved downward from front to back from its middle to its rear end. When the waist support member rotates, the lower end of the waist support member moves downwards and forwards, and the shape of the seat support member enables the distance between the waist support member and the seat support member to be further reduced so as to ensure the engagement between the seat support member and the waist support member and the continuity of the seat support member supporting surface and the waist support member supporting surface.

The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:

In this scheme, can let back support piece and waist support piece rotate independently each other, back support piece rotates to be connected on the chassis, and waist support piece rotates through the rotating turret to be connected on seat support piece, and when position of sitting was to lying, human back was pressed back support piece, and back support piece leaned back, and human waist then can drive waist support piece and rotate to let back support piece and waist support piece adapt to back and waist support piece's gesture respectively, provide suitable bearing.

Drawings

Fig. 1 is a schematic perspective view of a seat in a sitting posture support state of a lumbar support according to an embodiment of the present utility model;

Figure 2 is a side view of the seat of the present utility model with the lumbar support in a seated support position in an embodiment;

figure 3 is a cross-sectional view of the seat of the present utility model with the lumbar support in a seated support position in an embodiment;

Fig. 4 is a schematic perspective view of a lumbar support and a motion member when the lumbar support is in a sitting posture supporting state according to an embodiment of the present utility model;

Fig. 5 is a schematic perspective view of a seat in which a lumbar support is in a lying support state in an embodiment of the present utility model;

Fig. 6 is a side view of the seat in a lying support state of the lumbar support according to the embodiment of the present utility model;

fig. 7 is a sectional view of the seat in a lying support state of the lumbar support according to the embodiment of the present utility model;

fig. 8 is a schematic perspective view of a lumbar support and a motion member in a lying support state according to an embodiment of the present utility model;

Fig. 9 is a schematic perspective view of the connection of the rocker with the chassis and the guide in the embodiment of the present utility model;

Fig. 10 is a schematic perspective view of a bonding surface formed by the lumbar support in a lying support state according to an embodiment of the present utility model;

Fig. 11 is a schematic view of a seat in a sitting posture support state of the lumbar support according to an embodiment of the present utility model;

Fig. 12 is a schematic view of the use of the seat in the state that the lumbar support is supported in lying state in the embodiment of the present utility model.

The reference numerals are a seat support 1, a back support 2, a waist support 3, a chassis 4, a moving member 5, a back bracket 6, an extension seat 7, a sliding rotating member 8, a limit post 9, a chute 10, a limit groove 11, a rocker 12, a guide part 13, a guide member 14, a guide groove 15, a rotating frame 16, a fixing part 161, a support arm 162 and a reference line 17.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific embodiments of the present utility model are as follows:

The waist and back curves of the chair back in the prior art are S-shaped when a user sits on the chair normally, the front bulge of the waist position can be specially increased for adapting and attaching the S-shaped curves, and the waist and back curves of the chair back are approximately straight when the user lies on the chair, at the moment, the front bulge of the waist position of the chair back can press the waist and back of a human body, so that the user lies in an uncomfortable posture, in addition, in the prior art, the waist support piece 3 rotates along with the chair back, the waist support piece 3 is separated from the seat support piece 1, and a gap between the waist support piece and the seat support piece cannot be used for supporting the waist of the human body, so that the waist support effect on the human body is poor, and the comfort is greatly reduced.

Because the buttocks are connected with the waist, when a human body reclines, an included angle is formed between the buttocks and the waist, if the chair back is completely positioned behind the seat support 1 like a conventional chair, a gap is formed between the seat support 1 and the chair back, the waist above the buttocks is higher than the seat back and the seat support 1, the gaps among the seat support 1, the chair back and the waist are not supported, comfort is poor, if the waist is supported, the waist support 3 is required to fill the gap, but if the prior art is used, even if the gap between the waist support 3 and the seat support 1 is removed, a proper included angle cannot be formed, so that the waist support is realized, and because the waist support 3 always moves along with the back support 2 when the chair is reclined, the waist support 3 also moves downwards and backwards when rotating, the height of the chair back is reduced, and the waist of the human body cannot be supported naturally, so that the problem of the waist of the prior chair always has the hollow waist.

As shown in fig. 1, 5, 11 and 12, the utility model provides an ergonomic lumbar support assembly, which is applied to a seat, and comprises a seat support 1, a back support 2, a lumbar support 3 and a chassis 4, wherein the seat support 1 is configured to support buttocks of a human body, the back support 2 is configured to support back of the human body, the back support 2 is rotatably arranged relative to the seat support 1, the lumbar support 3 is configured to support lumbar of the human body, the lumbar support 3 is rotatably connected with the seat support 1, the lumbar support 3 is rotatably connected with the back support 2, the seat support 1 is arranged on the chassis 4, the back support 2 is rotatably connected with the chassis 4 so as to realize relative rotation with the seat support 1, and when the back support 2 and the chassis 4 rotate, the back support 2 rotates relative to the seat support 1, and the lumbar support 3 also rotates relative to the back support 2 and the seat support 1.

The lumbar support assembly comprises the seat support 1 and the lumbar support 3, wherein the lumbar support 3 is in a sitting posture support state and a lying support state, the lumbar support 3 faces forward in the sitting posture support state, the front part of the lumbar support 3 is positioned below the rear part of the lumbar support 3, the rear part of the lumbar support 3 rotates downwards relative to the front part of the lumbar support 3 when the sitting posture support state is switched to the lying support state, the lumbar support 3 faces upwards in the lying support state, and the lumbar support 3 supports the waist of a human body from bottom to top.

When the sitting posture supporting state is switched to the lying supporting state, a plurality of lumbar supports 3 can be realized, the rear part of the lumbar support 3 rotates downwards relative to the front part of the lumbar support 3, and the difference from the prior art is that the lumbar support 3 of the lumbar support assembly is directly connected to the seat support 1 in a rotating way, when the lumbar support 3 rotates, the rotating connection point of the lumbar support 3 and the seat support 1 is kept motionless, the lumbar support 3 and the seat support 1 cannot generate relative displacement, the lumbar support 3 can rotate more effectively, the rotating angle is large, the lumbar support 3 changes towards a large extent, and the lumbar support 3 rotates from basically forwards to basically upwards, so that the lumbar support 3 just supports the lumbar part from bottom to top at the lumbar position of a human body in the lying supporting state, and the lumbar part is not left or has poor supporting effect due to being inclined to insufficient level as the prior art lumbar support 3.

In addition, the waist support 3 is directly connected with the seat support 1 in a rotating way, and when the waist support 3 rotates, the lower end of the waist support 3 cannot be lifted far relative to the seat support 1, and the back of a human body cannot be pressed.

In this scheme, can let back support piece 2 and waist support piece 1 independent rotation each, back support piece 2 rotates to be connected on chassis 4, and waist support piece 3 rotates through rotating frame 6 to be connected on seat support piece 1, and when sitting posture was to lying, human back was pressed back support piece 2, and back support piece 2 leaned back, and human waist then can drive waist support piece 3 rotation to let back support piece 2 and waist support piece 3 adapt to back and waist support piece's gesture respectively, provide suitable bearing. In this embodiment, however, the linkage relationship of the back support 2 and the lumbar support 3 is still employed.

When the sitting posture supporting state is switched to the lying supporting state, the lower end of the lumbar support 3 moves from back to front and is close to the seat support 1, the distance between the lower end of the lumbar support 3 and the seat support 3 is reduced, the seat support 1 bends from front to back downwards from the middle to the rear end of the lower end, namely, the rotating connection point of the lumbar support 3 and the rotating frame 16 is positioned at the middle of the lumbar support 3, when the lumbar support 3 rotates, the distance between the lumbar support 3 and the seat support 1 is reduced when the sitting posture supporting state is switched to the lying supporting state, so that the transition between the seat support 1 and the lumbar support 3 is smoother, the lumbar support 3 supports the lumbar more reasonably, the waist support 3 is in accordance with ergonomics, when the lumbar support 3 rotates, the lower end of the lumbar support 3 moves downwards and forwards, the shape of the seat support 1 enables the distance between the lumbar support 3 and the seat support 1 to be further reduced, and the connection surface of the seat support 1 and the lumbar support 3 and the continuity of the supporting surface of the lumbar support 1 and the lumbar support 3 are ensured.

Further, in a sitting posture supporting state, the back support 2 and the waist support 3 are vertical, the back support 2 and the waist support 3 face forward for normal sitting of a human body, in a lying posture supporting state, the back support 2 leans backward, the waist support 3 leans upward for lying of the human body, when the sitting posture supporting state is switched to the lying posture supporting state, the back support 2 rotates backward relative to the seat support 1, the waist support 3 moves along with the backward leaning of the back support 2, the included angle between the waist support 3 and the back support 2 is reduced, and the front end of the waist support 3 is always located above the seat support 1.

Along with more seats with similar functions, the gravity center and the main flow are gradually deflected from manual adjustment to linkage, compared with adjustment requiring manual operation, the linkage is more convenient and is deflected to automatic adjustment, the intelligent seat is more intelligent, and for different functions, the reasonable distribution of the manual adjustment and the linkage is also important, for example, the position adjustment of the armrests and other parts can be manually adjusted, and the chair back tilting switching discussed by the utility model can be used, and the user can drive the chair back to move when lying down, so that the additional operation action in the manual adjustment can be replaced, thereby the linkage can be more reasonable and simpler.

Further, the back support 2 is rotatably arranged relative to the seat support 1, the back support 2 has a basic reclining function, the waist support 3 is rotatably connected with the seat support 1 and the back support 2, when a human body leans on, the back support 2 can drive the waist support 3 to rotate relative to the seat support 1 together, so that the switching between a sitting posture support state and a lying support state is realized, and the waist support 3 is directly or indirectly rotatably connected with the seat support 1, so that relative displacement movement in the front-back direction cannot be generated between the waist support 3 and the seat support 1, the front end of the waist support 3 is always positioned above the seat support 1, a gap cannot be generated between the seat support 1 and the waist support 3, the waist can be completely and continuously supported on the waist, the waist can be reasonably and effectively supported, and no empty waist feeling can be generated.

In the sitting posture supporting state, the back supporting piece 2 and the waist supporting piece 3 can support the waist and the back of a human body and are attached to the approximately S-shaped waist and back curves of the human body, in the lying supporting state, the included angle between the waist supporting piece 3 and the back supporting piece 2 is reduced, the curved surfaces formed by the two are changed, and the curved surfaces can be attached to the waist and back curves of the human body which are approximately straight when the human body leans backwards, so that when the human body sits and lies normally, the curved surfaces formed by the waist supporting piece 3 and the back supporting piece 2 are in accordance with the ergonomics of the respective states, and better comfortable sitting feeling and lying feeling are provided.

In order to realize the linkage of the back support 2 and the waist support 3, a moving part 5 is arranged between the back support 2 and the waist support 3 and/or a seat support 1 is arranged on the chassis 4 in a movable way, the waist support 3 is connected with the back support 2 and the seat support 1 in a rotating way, the back support 2 is connected with the chassis 4 in a rotating way, the seat support 1 is arranged on the chassis 4, if the back support 2 is fixed relative to the chassis 4, the waist support 3 is only connected with the back support 2 and the seat support 1 in a rotating way, when the back support 2 leans backwards to drive the waist support 3 to rotate, the movement is limited, and in order to enable the movement to smoothly run, an additional structural arrangement is also required, in the embodiment, the moving part 5 is arranged between the back support 2 and the waist support 3, and the seat support 1 is arranged on the chassis 4 through a lifting linkage mechanism.

Specifically, a moving member 5 is disposed between the back support 2 and the waist support 3, the back support 2 and the waist support 3 are disposed by the moving member 5, when the back support 2 rotates backward relative to the seat support 1, the waist support 3 and the back support 2 rotate relatively and the waist support 3 and the back support 2 are far away from each other, a moving member 5 capable of displacing the back support 2 and the waist support 3 relatively is disposed between the back support 2 and the waist support 3, thereby enabling the movement of the waist support 3, the back support 2 and the seat support 1 to be smoothly performed, and besides the moving member 5 disposed between the back support 2 and the waist support 3, the moving member 5 is disposed between the waist support 3 and the seat support 1, and the chassis 4 and the seat support 1 can be connected by the back support 2 and the chassis 4 rotating relatively, thereby realizing the same functions and effects.

The movable piece 5 is selected from a plurality of types, the movable piece 5 can be a connecting rod assembly or an elastic body or a telescopic sleeve assembly, when the movable piece 5 is the connecting rod assembly, the relative movement of the waist support 3 and the back support 2 is realized through a connecting rod in the connecting rod assembly, when the movable piece 5 is the elastic body, the upper end part of the waist support 3 is hinged with the elastic body, the elastic body deforms when the waist support 3 and the back support 2 relatively move, when the movable piece 5 is the telescopic sleeve assembly, one end of the sleeve assembly is fixedly connected with the back support 2 relatively, the other end of the telescopic sleeve is rotatably connected with the upper end part of the waist support 3, and the three can enable the linkage between the back support 2 and the waist support 3 to be smoothly carried out.

As shown in fig. 4 and 8, in the present embodiment, a back support 6 is connected below the back support 2, the back support 6 is rotatably disposed relative to the chassis 4, the lower end of the back support 2 is fixedly connected relative to the upper end of the back support 6, and the back support 2 and the back support 6 are integrally formed; the moving part 5 comprises an extension seat 7 and a sliding rotating part 8; the extension seat 7 is fixedly arranged on the back support 6 below the back support 2 forwards, one end of the sliding rotation piece 8 is rotationally connected with the upper end part of the waist support piece 3, and the sliding rotation piece 8 is in sliding fit with the extension seat 7; when the back support 2 rotates backwards relative to the seat support 1, the waist support 3 and the sliding rotation part 8 rotate to generate relative rotation with the back support 2, the sliding rotation seat and the extension seat 7 slide relatively, the motion part 5 stretches, a limit post 9 is arranged at one end of the sliding rotation part 8 facing the extension seat 7, one limit post 9 is arranged at the left side and the right side of the sliding rotation part 8, a sliding groove 10 is arranged on the extension seat 7 along the length direction of the extension seat 7, the sliding rotation part 8 is arranged in the sliding groove 10, a limit groove 11 is arranged on the extension seat 7 at the side of the sliding groove 10, the limit post 9 is arranged in the limit groove 11, the track of the limit groove 11 is arranged along the extension direction of the extension seat 7, the extension seat 7 bends downwards from front to back in a sitting posture support state, when the motion part 5 is used, the motion part 5 does not need to operate, and is in a smooth change along with the motion of the back support 2 and the waist support 3 so as to enable the motion to smoothly proceed, the motion part 5 is in a way of adapting to the motion of the waist support 3, the motion part 2 and the motion part 1, the motion part 7 is arranged along with the motion of the extension seat support 7, the motion part 7 is arranged along with the motion of the motion part 5, the limiting post 9 moves in the sliding groove 10 to limit the movement track of the sliding rotating member 8, meanwhile, the moving member 5 and the waist supporting member 3 mutually limit the movement track of the two moving members to reach a preset movement mode, and finally, the shape of the extending seat 7, namely the shape of the limiting groove 11, is suitable for the movement of the waist supporting member 3 and limits the movement track of the sliding rotating member 8.

As shown in fig. 3, 7 and 9, the seat support 1 is arranged on the chassis 4 through a lifting linkage mechanism, the lifting linkage mechanism drives the seat support 1 to rise along with the backward tilting of the back support 2, when the back support 2 is backward tilted, the upper end part of the waist support 3 moves backwards and downwards, and the lower end part of the waist support 3 moves upwards; the seat support 1 is movably arranged on the chassis 4, when the sitting posture support state is switched to the lying support state, the rotation angle of the waist support 3 is larger through the lifting movement of the seat support 1, so that more reasonable waist support is realized, specifically, the lifting linkage mechanism comprises a rocker 12, the rear end of the rocker 12 is fixedly connected with the back support 2 relatively, the front end of the rocker 12 is rotatably connected with the seat support 1, the middle part of the rocker 12 is rotatably connected with the chassis 4, the lifting linkage mechanism further comprises a guide part 13, the guide part 13 is arranged below the seat support 1, the guide part 13 is rotatably connected with the front end of the rocker 12, the chassis 4 is opened upwards and backwards and hollow, the guide part 13 is arranged in the chassis 4 from top to bottom, a guide part 14 and a guide groove 15 are arranged between the guide part 13 and the chassis 4, the guide part 14 is arranged in the guide groove 15, the guide groove 15 is inclined upwards from front to back, the guide part 13 is configured to move in the guide groove 15 and provide the guide part for the movement direction of the seat support 1 when the back support 2 is reclined, the seat support 1 is driven by the rocker 12 and the back support 2 is not required to move relative to the back support 2, the seat support 1 is required to be directly linked with the back support 2 through the seat support 2, the seat support 2 and the seat support 1 is not required to be moved upwards and the seat support 2 is required to be directly moved upwards and the seat support 2, the seat support is required to be moved upwards and the seat support 2 is directly to be moved by the seat support through the seat support and the seat support 2, the back support 2, the waist support 3 and the seat support 1 are linked more reasonably. Besides the scheme of the embodiment, the lifting linkage mechanism can be replaced by a lifting link assembly, so that the same effect is achieved, and the lifting linkage mechanism of the embodiment is simpler in structure.

The seat support 1 is arranged on the chassis 4, the back support 2 is rotationally connected with the chassis 4, and the chassis 4 is added into the seat support 1, the back support 2 and the waist support 3 to realize the diversity of movement, namely, when the chassis 4 is fixed as a foundation, the back support 2 is rotationally connected on the chassis 4 to realize the relative rotation with the seat support 1, and the seat support 1 and the chassis 4 can be selectively provided with movable connection to enable the back support 2 to be opposite to the movement of the seat support 1, so that the waist support 3 can have a larger rotation angle.

Further, the rotating frame 16 is arranged on the seat support 1, the rotating frame 16 is fixed relative to the seat support 1, the rotating frame 16 is positioned at the rear part of the seat support 1, the rotating frame 16 extends upwards and is in rotary connection with the waist support 3, the waist support 3 is connected to the rotating frame 16 instead of being directly connected to the seat support 1, on one hand, the height of the waist support 3 is raised, the waist support 3 has a height similar to that of an existing seat in a sitting posture support state, a due function is achieved, meanwhile, the waist support 3 can not interfere with the seat support 1 when rotating, the seat support 1 can be effectively avoided, on the other hand, the waist support 3 is in rotary connection with the rotating frame 16, the rotary connection point of the waist support 3 is obviously different from the rotary connection point of the back support 2, and in this case, larger-angle rotation of the waist support 3 can be achieved, and an included angle between the waist support 3 and the back support 2 is reduced, and a required effect is achieved.

Specifically, the lumbar support 3 is a frame structure, the rotating frame 16 includes a fixing portion 161 at the lower end thereof, the fixing portion 161 is fixedly connected with the rear end of the seat support 1 by screws, two branched support arms 162 extend from the upper end of the rotating frame 16, the two support arms 162 extend to the left and right sides and incline forward and upward respectively, and finally the end of the support arm 162 is rotatably connected with the middle lower portion of the lumbar support 3 by a rotating shaft, in this embodiment, the rotating frame 16 is rotatably connected with the middle portion or the middle lower portion of the lumbar support 3 and the lumbar support 3, and the rotating frame 16 is rotatably connected with the lower end of the lumbar support 3, so that better lumbar support can be achieved than in the prior art, but the selection effect of this embodiment is better, the lower end of the lumbar support 3 is vacated and is located below the rotating connection point of the lumbar support 3 and the rotating frame 16, and the lower end of the lumbar support 3 can extend forward to the lower portion of the lumbar support 3 in a lying support state to support the lumbar of the human body so as to provide a more comfortable lumbar support.

As shown in fig. 2, 6 and 10-12, the back support 2 and the lumbar support 3 are formed with a bearing surface for being attached to the lumbar back of a human body, the seat support 1 is formed with a seat surface for being attached to the buttocks of the human body, the bearing surface and the seat surface are formed with continuous attaching surfaces, the attaching surfaces are attached to the buttocks and the lumbar back of the human body, and the conventional chair back is provided with a backward curved shape, so that the human body is trapped therein and feel a wrap-around feeling, and therefore, in order to more accurately describe the attaching of the chair back and the lumbar back of the human body, the bearing surface is provided with a reference line 17, the reference line 17 is positioned in the middle of the bearing surface, and the reference line 17 is a straight line from the upper end of the back support 2 to the lower end bearing surface of the lumbar support 3, in a sitting posture support state, the reference line 17 is approximately straight with a certain backward curved arc, specifically, the reference line 17 reflects the overall sitting posture state of the bearing surface, in the supporting state, the sitting posture state is a lower forward curved line, that is in the lumbar support state, the back support 3 is bent with respect to the lumbar support 3, and the back support 3 is bent straight, and the human body is attached to the straight line when the back support 2 is in the sitting state, the lying state, the back support is bent, and the human body is in the straight line is in the straight state, and the lying state, and the human body is in the back support state.

In addition, when the sitting posture supporting state is switched to the lying supporting state, the bearing surface is close to the seat surface, namely, when the sitting posture supporting state is switched to the lying supporting state, the waist supporting piece 3 rotates, the lower end of the waist supporting piece is close to the seat supporting piece 1, unlike a conventional seat, the waist supporting piece 3 is far away from the seat supporting piece 1, a gap is not formed between the waist supporting piece 3 and the seat supporting piece 1, and the waist is prevented from lying on the body.

In this embodiment, under position of sitting support state and the support state of lying, the laminating face is continuous rather than disconnected, makes human buttock, waist and back all can paste on the laminating face, and human buttock and waist back all can receive effective reasonable bearing, can not appear the condition of empty waist.

Although the lumbar support 3 and the bearing surface of the back support 2 are approximately straight, the bearing surface of the lumbar support 3 and the bearing surface of the back support 2 are completely straight, in the dual-back structure, the reference line 17 at the back support 2 is generally straight, the reference line 17 at the lumbar support 3 is also straight, an included angle is formed between the lumbar support 3 and the seat surface, the transition is not round, the gap is formed below the waist, the lumbar support 3 which is designed to be round and concave specially for lying is lost, the effect of supporting the lumbar support 3 in a forward convex manner is achieved when the user sits normally, the effect of supporting the lumbar support 3 in a forward convex manner is not good, so that in the embodiment, the conventional forward convex lumbar support 3 is used, the comfortable top waist in a normal sitting position is ensured, in a sitting position supporting state, the lumbar support 3 is supported by the middle upper portion of the lumbar support 3 in a fit manner, and when the sitting position supporting state is switched to a lying supporting state, the lumbar support 3 and the back support 2 are relatively rotated, the shape of the bearing surface is changed, the lumbar support 3 is supported by the middle lower portion of the lumbar support 3, the lumbar support 3 is relieved by the lumbar support 3, the lumbar support 3 is supported by the back support 3 in a round shape, the front surface is still more reasonably flat than the lumbar support 2, and the lumbar support 3 is supported by the back support 3 in a straight shape, and the shape is still more reasonable.

In the case of the rotation angle, specifically, when the sitting posture supporting state is switched to the lying supporting state, the rotation angle of the lumbar support 3 is larger than the rotation angle of the back support 2, so that the included angle between the lumbar support 3 and the back support 2 can be reduced, the rotation angle of the lumbar support 3 is larger than the rotation angle of the back support 2, because the rotation connection point of the lumbar support 3 and the back support 2 is different, the back support 2 is rotatably connected to the chassis 4, and the lumbar support 3 is rotatably connected to the rotating frame 16 on the seat support 1.

Still further, as shown in fig. 11 and 12, in the lying support state, the inclination angle of the lumbar support 3 with respect to the ground is 13 to 20 °, in the present embodiment, the inclination angle of the lumbar support 3 with respect to the ground is 14 °, in the sitting support state, the angle of the lumbar support 3 with respect to the seat support 1 is 115 to 120 °, in the lying support state, the angle of the lumbar support 3 with respect to the seat is 158 to 165 °, in the present embodiment, the angle of the lumbar support 3 with respect to the seat is 116 °, in the sitting support state, the angle of the lumbar support 3 with respect to the seat is 160 °, in the lying support state, the rotation angle of the lumbar support 3 is 43 to 50 °, and in the present embodiment, the rotation angle of the lumbar support 3 is 44 °.

The angle of inclination of the lumbar support 3 relative to the ground in the lying support state is obviously smaller than that of the lumbar support 3 in the existing seat, so that the angle of inclination of the lumbar support 3 relative to a vertical plane is larger, the lumbar support 3 faces more upwards to support the waist of a human body, the angle of the lumbar support 3 and the seat support 1 is larger when the lumbar support 3 is in the lying support state from the sitting support state to the lying support state, the angle of the lumbar support 3 and the seat support 1 is similar to that of a conventional seat in the sitting support state, the angle of the lumbar support 3 and the seat support 1 is obviously larger when the lumbar support 3 is in the lying support state, the lumbar support 3 is more inclined, the lumbar support 3 faces more upwards, the waist of the human body is supported more reasonably, the user can feel more comfortable, the rotation angle of the lumbar support 3 is larger than that of the lumbar support 3 of the existing seat, the aim is to enable the lumbar support 3 to incline more reasonably face, the lumbar support of the human body in a more reasonable posture, and the comfort is improved.

Claims

1. An ergonomic lumbar support assembly, characterized by comprising the following steps:

A seat support configured to support buttocks of a human body;

2. The ergonomic lumbar support assembly of claim 1 wherein the lumbar support is inclined at an angle of 13-20 ° relative to the ground in the reclined support condition.

3. The ergonomic lumbar support assembly of claim 1 wherein the lumbar support is positioned at an angle of 115-120 ° relative to the seat support in a sitting support position and at an angle of 158-165 ° relative to the seat in a reclined support position.

4. The ergonomic lumbar support assembly of claim 1 wherein the lumbar support is rotated at an angle of 43-50 °.

5. The ergonomic lumbar support assembly of claim 1 wherein the seat support rear end is fixedly coupled to a vertical turret, the turret projecting upwardly from the seat support upper surface, the lumbar support being rotatably coupled to the turret.

6. The ergonomic lumbar support assembly of claim 1 wherein the lumbar support lower end is suspended and when the sitting support position is switched to the reclined support position, the lumbar support lower end moves back-to-front and approaches the seat support, the spacing between the lumbar support lower end and the seat support decreases.

7. The ergonomic lumbar support assembly of claim 6 wherein the seat support member curves downwardly from front to back from a central portion thereof to a rear end portion thereof.