Waist supporting assembly conforming to ergonomics

Abstract

The utility model provides an ergonomic waist support assembly, which comprises a seat for supporting the buttocks of a human body and a waist rest for supporting the waist of the human body, and the waist rest is rotatably connected to the seat; the waist rest has a sitting posture state and a lying state, the waist rest of the waist supporting assembly is directly and rotatably connected to the chair seat, when the waist rest rotates, the rotary connecting point of the waist rest and the chair seat is kept immovable, the waist rest and the chair seat do not generate relative displacement, the waist rest can rotate more effectively, the rotating angle is large, the orientation of the waist rest is changed greatly, and the waist rest is more comfortable to use. The waist rest is rotated from a basically forward direction to a basically upward direction, so that the waist rest just supports the waist from bottom to top at the waist position of a human body in a lying supporting state, and the situation that an existing waist rest keeps a space for the waist or is poor in supporting effect due to the fact that the waist rest is not inclined horizontally enough is avoided; and the waist rest is directly and rotationally connected with the seat, so that when the waist rest rotates, the lower end of the waist rest cannot be lifted much relative to the seat, and the back of a human body cannot be pressed.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to an ergonomic waist support component. Background Art

[0002] Existing seats have become increasingly versatile and can provide both sitting and lying functions. The sitting and lying functions can be switched simply by tilting the chair back. Having complete functions does not mean that the seat is excellent. The biggest criterion for judging a seat is still comfort, and it should provide ergonomic comfort.

[0003] In the reclining function of the existing chairs, there is a problem of poor comfort that everyone wants to solve: when the chair back is tilted backward, the overall angle of the chair back of the single-back chair is the same. The support required for the user's waist in the lying position and the sitting position is different. In the existing chair backs, due to the angle problem of the chair back, it is difficult to provide support in both the lying position and the sitting position. In the lying position, the support effect on the waist is poor; in the double-back chair, if the lumbar support member is non-rotatably connected to the back support member, the effect is the same as that of the single-back chair. If the lumbar support member is rotationally connected to the back support member, the lumbar support member rotates too much, and its lower end will be raised a lot relative to the seat support member, which not only cannot support the waist, but also causes the waist to be hurt. Therefore, even if the lumbar support member is rotationally connected to the back support member, the rotation angle of the two is limited, and good support cannot be achieved; for example, the chair back lumbar support member of Chinese utility model patent 202320935281.4 has a small inclination angle. Although it will not hurt the waist, it cannot solve the above-mentioned problem of supporting the human waist more comfortably. Summary of the invention

[0004] The lumbar support assembly of the utility model provides an ergonomic lumbar support assembly, comprising a seat support for supporting the buttocks of a human body and a lumbar support for supporting the waist of a human body, wherein the lumbar support assembly is rotatably connected to the seat support assembly; the lumbar support assembly has a sitting state and a lying state, and the lumbar support assembly of the lumbar support assembly is directly rotatably connected to the seat support assembly. When the lumbar support assembly rotates, the rotation connection point between the lumbar support assembly and the seat support assembly remains stationary, and the lumbar support assembly and the seat support assembly do not produce relative displacement. The lumbar support assembly can be more effectively rotated, and the rotation angle is large, so that the direction of the lumbar support assembly can be greatly changed, from basically rotating forward to basically rotating upward, so that in the lying support state, the lumbar support assembly supports the waist from bottom to top at the waist position of the human body, instead of leaving the waist empty or having a poor supporting effect due to not being tilted horizontally enough like the existing lumbar support assembly; and the lumbar support assembly is directly rotatably connected to the seat support assembly, and when the lumbar support assembly rotates, the lower end of the lumbar support assembly will not be raised much relative to the seat support assembly, and will not oppress the back of the human body.

[0005] The technical solution of the utility model is achieved in this way:

[0006] An ergonomic lumbar support assembly, comprising:

[0007] a seat support configured to support a buttocks of a human body;

[0008] The waist support member is configured to support the waist of a human body; the waist support member is rotatably connected to the seat support member;

[0009] The lumbar support has a sitting support state and a lying support state. In the sitting support state, the lumbar support faces forward, and the front part of the lumbar support is located below the rear part of the lumbar support. When the sitting support state is switched to the lying support state, the rear part of the lumbar support rotates downward relative to the front part of the lumbar support. In the lying support state, the lumbar support faces upward, and the lumbar support supports the human waist from bottom to top.

[0010] When the sitting support state is switched to the lying support state, many lumbar support members can achieve that the rear portion of the lumbar support member rotates downward relative to the front portion of the lumbar support member. The difference from the existing ones is that the lumbar support member of the lumbar support assembly is directly rotatably connected to the seat support member. When the lumbar support member rotates, the rotation connection point between the lumbar support member and the seat support member remains stationary, and the lumbar support member and the seat support member do not produce relative displacement. The lumbar support member can rotate more effectively with a large rotation angle, so that a large change in the direction of the lumbar support member can be achieved, from basically rotating forward to basically rotating upward, so that in the lying support state, the lumbar support member supports the waist from bottom to top at the human body's waist position, instead of leaving the waist empty like the existing lumbar support member or having poor support effect due to not being tilted horizontally enough.

[0011] Moreover, the waist support is directly connected to the seat support for rotation. When the waist support rotates, the lower end of the waist support will not be lifted much relative to the seat support, and will not oppress the back of the human body.

[0012] Preferably, in the lying support state, the lumbar support member has an inclination angle of 13-20° relative to the ground. The inclination angle of the lumbar support member relative to the ground in the lying support state is significantly smaller than the inclination angle of the lumbar support member in the existing chair, so that the lumbar support member has a larger inclination angle relative to the vertical plane, and its orientation is closer to upward to support the human waist.

[0013] Preferably, in the sitting support state, the angle between the lumbar support and the seat support is 115-120°, and in the lying support state, the angle between the lumbar support and the seat is 158-165°. When changing from the sitting support state to the lying support state, the angle between the lumbar support and the seat support increases. In the sitting support state, the angle between the lumbar support and the seat support is similar to that of a conventional seat, but in the lying support state, the angle between the lumbar support and the seat support is significantly larger, the lumbar support is more inclined, and the direction of the lumbar support tends to face upward, so that the support for the human waist is more reasonable, and the user can get a more comfortable experience.

[0014] Preferably, the rotation angle of the lumbar support is 43-50°. The rotation angle of the lumbar support is larger than that of the existing seat lumbar support, the purpose of which is to make the lumbar support more inclined and more reasonably oriented, so as to support the human waist in a better posture and improve comfort.

[0015] Preferably, a vertical rotating frame is fixedly connected to the rear end of the seat support, the rotating frame protrudes upward from the upper surface of the seat support, and the lumbar support is rotatably connected to the rotating frame. The lumbar support is connected to the rotating frame instead of being directly connected to the seat support, which raises the height of the lumbar support, so that the lumbar support has a height similar to that of the existing seat in the sitting support state, achieving the desired function, and at the same time, the lumbar support does not interfere with the seat support when rotating, and the seat support can be effectively avoided.

[0016] Preferably, the lower end of the lumbar support is suspended, and when the sitting support state is switched to the lying support state, the lower end of the lumbar support moves from the back to the front and approaches the seat support, and the distance between the lower end of the lumbar support and the seat support is reduced. That is, the rotation connection point between the lumbar support and the rotating frame is located in the middle of the lumbar support, and when the lumbar support rotates, when the sitting support state is switched to the lying support state, the distance between the lumbar support and the seat support is reduced, so that the transition between the seat support and the lumbar support is smoother, and the lumbar support provides more reasonable support to the waist, which is ergonomic.

[0017] Preferably, the seat support is bent downward from the middle to the rear end thereof. When the lumbar support rotates, the lower end of the lumbar support moves downward and forward, and the shape of the seat support can further reduce the distance between the lumbar support and the seat support to ensure the connection between the seat support and the lumbar support, as well as the continuity of the support surface of the seat support and the support surface of the lumbar support.

[0018] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0019] When the sitting support state is switched to the lying support state, many lumbar support members can achieve that the rear portion of the lumbar support member rotates downward relative to the front portion of the lumbar support member. The difference from the existing ones is that the lumbar support member of the lumbar support assembly is directly rotatably connected to the seat support member. When the lumbar support member rotates, the rotation connection point between the lumbar support member and the seat support member remains stationary, and the lumbar support member and the seat support member do not produce relative displacement. The lumbar support member can rotate more effectively with a large rotation angle, so that a large change in the direction of the lumbar support member can be achieved, from basically rotating forward to basically rotating upward, so that in the lying support state, the lumbar support member supports the waist from bottom to top at the human body's waist position, instead of leaving the waist empty like the existing lumbar support member or having poor support effect due to not being tilted horizontally enough.

[0020] Moreover, the waist support is directly connected to the seat support for rotation. When the waist support rotates, the lower end of the waist support will not be lifted much relative to the seat support, and will not oppress the back of the human body.

[0021] In this solution, the back support and the lumbar support can be rotated independently. The back support is rotatably connected to the chassis, and the lumbar support is rotatably connected to the seat support through a rotating frame. When changing from a sitting position to a lying position, the human back presses against the back support, and the back support tilts backward, and the human waist drives the lumbar support to rotate, thereby allowing the back support and the lumbar support to adapt to the postures of the back and lumbar support to provide appropriate support. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the seat when the waist support member in the embodiment of the utility model is in a sitting support state;

[0023] Figure 2 It is a side view of the seat when the waist support member in the embodiment of the utility model is in a sitting support state;

[0024] Figure 3 It is a cross-sectional view of the seat when the waist support member in the embodiment of the utility model is in a sitting support state;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the lumbar support member and the moving member when the lumbar support member is in a sitting support state in an embodiment of the utility model;

[0026] Figure 5 This is a three-dimensional structural schematic diagram of the seat in the embodiment of the utility model when the waist support member is in a lying support state;

[0027] Figure 6 It is a side view of the seat in the embodiment of the utility model, in which the waist support member is in a lying support state;

[0028] Figure 7It is a cross-sectional view of the seat in the embodiment of the utility model, in which the waist support member is in a lying support state;

[0029] Figure 8 It is a three-dimensional structural schematic diagram of the lumbar support member and the moving member in the embodiment of the utility model when the lumbar support member is in a lying support state;

[0030] Fig. 9 This is a schematic diagram of the three-dimensional structure of the seesaw connected to the chassis and the guide part in the embodiment of the utility model;

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the fitting surface formed when the waist support member in the embodiment of the utility model is in a lying support state;

[0032] Fig.11 This is a schematic diagram of the use of the seat in the embodiment of the utility model, in which the waist support member is in a sitting support state;

[0033] Fig.12 This is a schematic diagram of the use of the seat in the embodiment of the utility model, in which the lumbar support member is in a lying support state.

[0034] The reference numerals of the figures are as follows: seat support 1; back support 2; lumbar support 3; chassis 4; moving part 5; back bracket 6; extension seat 7; sliding rotating part 8; limiting column 9; slide groove 10; limiting groove 11; rocker 12; guide part 13; guide part 14; guide groove 15; rotating frame 16; fixing part 161; support arm 162; reference line 17. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0037] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0038] The specific implementation of the utility model is as follows:

[0039] When a user sits on a chair normally, the curve of his / her waist and back is S-shaped. In order to adapt to and fit the S-shaped curve, the backrests of existing chairs will specially increase the convexity of the waist position; when a user lies on the chair, the curve of his / her waist and back is roughly straight. At this time, the convexity of the waist position of the backrest will not only compress the waist and back of the human body, making the user lie in an uncomfortable posture, but also, in existing conventional chairs, after the lumbar support member 3 rotates with the backrest, the lumbar support member 3 will be separated from the seat support member 1, and the gap between the two cannot be used to support the human waist. Therefore, the supporting effect on the human waist is poor, and the comfort is greatly reduced.

[0040] Since the buttocks are connected to the waist, when the human body lies down, there is an angle between the buttocks and the waist. If, like a conventional chair, the chair back is completely located behind the seat support 1, a gap will be created between the seat support 1 and the chair back, and the waist above the buttocks will be higher than the chair back and the seat support 1. The gap between the seat support 1, the chair back and the waist makes the waist unsupported, resulting in poor comfort. If the waist is to be supported, the lumbar support 3 must be able to fill this gap; but if the existing technology is used, even if the gap between the lumbar support 3 and the seat support 1 is removed, it is impossible to give a suitable angle to achieve waist support. The reason is that, regardless of the single-back structure or the double-back structure, when the chair back is reclined, the lumbar support 3 always moves with the back support 2. While rotating, the lumbar support 3 also has a downward and backward displacement movement, which reduces its height and naturally cannot support the human body's waist. Therefore, the chair back of the existing chair always has the problem of an empty waist.

[0041] like Figure 1 , 5 As shown in Figures 11 and 12, the utility model provides an ergonomic lumbar support component, which is used in a seat, and the seat includes a seat support 1, a back support 2, a lumbar support 3 and a chassis 4. The seat support 1 is configured to support the buttocks of a human body, the back support 2 is configured to support the back of a human body, the back support 2 is relatively rotatably arranged with the seat support 1, the lumbar support 3 is configured to support the waist of a human body, the lumbar support 3 is rotatably connected with the seat support 1, and the lumbar support 3 is also rotatably connected with the back support 2; the seat support 1 is arranged on the chassis 4, and the back support 2 is rotatably connected with the chassis 4 to achieve a relative rotation arrangement with the seat support 1. 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.

[0042] The lumbar support assembly includes the seat support 1 and the lumbar support 3 mentioned above. The lumbar support 3 has a sitting support state and a lying support state. In the sitting support state, the lumbar support 3 faces forward, and the front part of the lumbar support 3 is located below the rear part of the lumbar support 3; when the sitting support state is switched to the lying support state, the rear part of the lumbar support 3 rotates downward relative to the front part of the lumbar support 3; in the lying support state, the lumbar support 3 faces upward, and the lumbar support 3 supports the human waist from bottom to top.

[0043] When the sitting support state is switched to the lying support state, many lumbar support members 3 can achieve that the rear portion of the lumbar support member 3 rotates downward relative to the front portion of the lumbar support member 3. The difference from the existing one is that the lumbar support member 3 of the lumbar support assembly is directly rotatably connected to the seat support member 1. When the lumbar support member 3 rotates, the rotation connection point between the lumbar support member 3 and the seat support member 1 remains stationary, and the lumbar support member 3 and the seat support member 1 do not produce relative displacement. The lumbar support member 3 can be rotated more effectively with a large rotation angle, so that a large change in the direction of the lumbar support member 3 can be achieved, from basically rotating forward to basically rotating upward, so that in the lying support state, the lumbar support member 3 supports the waist from bottom to top at the human body's waist position, instead of leaving a space for the waist like the existing lumbar support member 3 or having a poor support effect due to not being tilted horizontally enough.

[0044] Moreover, the lumbar support member 3 is directly rotatably connected to the seat support member 1. When the lumbar support member 3 rotates, the lower end of the lumbar support member 3 will not be lifted much relative to the seat support member 1, and will not oppress the back of the human body.

[0045] In this solution, the back support 2 and the waist support 1 can be rotated independently, the back support 2 is rotatably connected to the chassis 4, and the waist support 3 is rotatably connected to the seat support 1 through the rotating frame 6. When the sitting position changes to the lying position, the back of the human body presses against the back support 2, the back support 2 tilts backward, and the waist of the human body drives the waist support 3 to rotate, so that the back support 2 and the waist support 3 can adapt to the posture of the back and waist support, and provide appropriate support. However, in this embodiment, the linkage relationship between the back support 2 and the waist support 3 is still adopted.

[0046] When the user is in a state of sitting and lying down, the lower end of the lumbar support 3 is suspended in the air. When the sitting support state is switched to the lying support state, the lower end of the lumbar support 3 moves from back to front and approaches the seat support 1, and the distance between the lower end of the lumbar support 3 and the seat support 3 is reduced, and the seat support 1 is bent downward from the middle to the rear end thereof; that is, the rotation connection point of the lumbar support 3 and the rotating frame 16 is located in the middle of the lumbar support 3. When the lumbar support 3 rotates, when the user is in a state of sitting and lying down, the distance between the lumbar support 3 and the seat support 1 is reduced, so as to make the transition between the seat support 1 and the lumbar support 3 smoother, and the support of the lumbar support 3 to the waist is more reasonable and ergonomic; when the lumbar support 3 rotates, the lower end of the lumbar support 3 moves downward and forward, and the shape of the seat support 1 can further reduce the distance between the lumbar support 3 and the seat support 1, so as to ensure the connection between the seat support 1 and the lumbar support 3, and the continuity of the support surface of the seat support 1 and the support surface of the lumbar support 3.

[0047] Furthermore, in the sitting support state, the back support 2 and the lumbar support 3 are vertical and both face forward, so that the human body can sit normally; in the lying support state, the back support 2 leans back and the lumbar support 3 is inclined and faces upward, so that the human body can lie down; when switching from the sitting support state to the lying support state, the back support 2 rotates backward relative to the seat support 1, and the lumbar support 3 moves as the back support 2 leans back, and the angle between the lumbar support 3 and the back support 2 decreases, and the front end of the lumbar support 3 is always located above the seat support 1.

[0048] As more and more seats have similar functions, the design focus and mainstream have gradually shifted from manual adjustment to linkage. Compared with adjustments that require manual operation, linkage is more convenient, tends to be automated, and appears to be more intelligent. For different functions, it is also important to reasonably allocate and use manual adjustment and linkage. For example, the position adjustment of parts such as armrests can be done manually, while the chair back tilt switching discussed in the present invention can replace the additional operating actions in manual adjustment because the user will drive the chair back to move when lying down. Therefore, the use of linkage is more reasonable and simpler.

[0049] Furthermore, the back support 2 is rotatably arranged relative to the seat support 1, and the back support 2 has a basic reclining function. The lumbar support 3 is rotatably connected to the seat support 1 and the back support 2. When the human body leans on it, the back support 2 can drive the lumbar support 3 to rotate relative to the seat support 1, thereby realizing the switching between the sitting support state and the lying support state. Since the lumbar support 3 is directly or indirectly rotatably connected to the seat support 1, the lumbar support 3 and the seat support 1 will not produce relative displacement movement in the front and rear directions. The front end of the lumbar support 3 is always located above the seat support 1, and no gap is generated between the seat support 1 and the lumbar support 3, which can fully and continuously support the waist and back of the human body, so that the waist is reasonably and effectively supported without a feeling of empty waist.

[0050] In the sitting support state, the back support 2 and the lumbar support 3 can support the waist and back of the human body and fit the roughly S-shaped waist and back curve of the human body. In the lying support state, the angle between the lumbar support 3 and the back support 2 is reduced, and the curved surface formed by the two changes and can fit the roughly straight waist and back curve when the human body leans back. Therefore, when the human body sits or lies normally, the curved surface formed by the lumbar support 3 and the back support 2 conforms to the ergonomics in their respective states, so as to provide a better comfortable sitting and lying feeling.

[0051] In order to realize the linkage between the back support 2 and the lumbar support 3, it is also necessary to set a moving part 5 between the back support 2 and the lumbar support 3 and / or let the seat support 1 be movably set on the chassis 4; the lumbar support 3 is rotatably connected with the back support 2 and the seat support 1, the back support 2 is rotatably connected with the chassis 4, and the seat support 1 is set on the chassis 4. If the back support 2 and the chassis 4 are relatively fixed, and the lumbar support 3 is only rotatably connected with the back support 2 and the seat support 1, then when the back support 2 leans back to drive the lumbar support 3 to rotate, the movement will be restricted. In order to make the movement run smoothly, additional structural settings are required; in this embodiment, a moving part 5 is provided between the back support 2 and the lumbar support 3, and the seat support 1 is set on the chassis 4 through a lifting linkage mechanism.

[0052] Specifically, a moving part 5 is provided between the back support 2 and the lumbar support 3, and the back support 2 and the lumbar support 3 are arranged to move relative to each other through the moving part 5; when the back support 2 rotates backward relative to the seat support 1, the lumbar support 3 and the back support 2 rotate relative to each other and the lumbar support 3 and the back support 2 move away from each other; a moving part 5 is provided between the back support 2 and the lumbar support 3 to enable the two to move relative to each other, so that the movement among the lumbar support 3, the back support 2 and the seat support 1 can be carried out smoothly; in addition to providing the moving part 5 between the back support 2 and the lumbar support 3, the moving part 5 can also be provided between the lumbar support 3 and the seat support 1, and the same function and effect can also be achieved by rotatably connecting the back support 2 to the chassis 4 and relatively moving the chassis 4 and the seat support 1.

[0053] There are many options for the moving part 5. The moving part 5 can be a connecting rod assembly, an elastomer, or a telescopic sleeve assembly. When the moving part 5 is a connecting rod assembly, the connecting rod in the connecting rod assembly can realize the relative rotation and relative movement of the lumbar support 3 and the back support 2; when the moving part 5 is an elastomer, the upper end of the lumbar support 3 is hinged to the elastomer, and the elastomer is deformed when the lumbar support 3 and the back support 2 move relative to each other; when the moving part 5 is a telescopic sleeve assembly, one end of the sleeve assembly is relatively fixedly connected to the back support 2, and the other end of the telescopic sleeve is rotatably connected to the upper end of the lumbar support 3; all three can make the linkage between the back support 2 and the lumbar support 3 smooth and fluent.

[0054] like Figure 4 , 8 As shown, in this embodiment, a back bracket 6 is connected to the lower part of the back support member 2, and the back bracket 6 is arranged to rotate relative to the chassis 4. The lower end of the back support member 2 is relatively fixedly connected to the upper end of the back bracket 6, and the back support member 2 and the back bracket 6 are integrally formed; the moving member 5 includes an extension seat 7 and a sliding rotating member 8; the extension seat 7 is fixedly installed on the back bracket 6 below the back support member 2 toward the front, and one end of the sliding rotating member 8 is rotatably connected to the upper end of the waist support member 3, and the sliding rotating member 8 slides with the extension seat 7; when the back support member 2 rotates backward relative to the seat support member 1, the waist support member 3 and the sliding rotating member 8 rotate and rotate relative to the back support 2. At the same time, the sliding rotating seat and the extension seat 7 slide relative to each other, and the moving member 5 extends; a limiting column 9 is provided at the end of the sliding rotating member 8 facing the extension seat 7, and a limiting column 9 is provided on the left and right sides of the sliding rotating member 8. The extension seat 7 is provided with a slide groove 10 along the length direction, and the sliding rotating member 8 is arranged in the slide groove 10. The slide groove 10 A limiting groove 11 is provided on the side extension seat 7, and a limiting column 9 is arranged in the limiting groove 11. The trajectory of the limiting groove 11 is arranged along the extension direction of the extension seat 7. In the sitting support state, the extension seat 7 bends downward from front to back; when using the moving part 5, the moving part 5 does not need to be operated. It realizes adaptive changes with the movement of the back support part 2 and the waist support part 3 to make the movement smooth and smooth; the moving part 5 is arranged to adapt to the movement of the waist support part 3, the back support part 2 and the seat support part 1. The sliding rotating part 8 in the moving part 5 and the extension seat 7 move adaptively with the movement of the three. The limiting column 9 moves in the slide groove 10 to limit the movement trajectory of the sliding rotating part 8. At the same time, the moving part 5 and the waist support part 3 limit the movement trajectories of both parties to achieve a preset movement mode; finally, the shape of the extension seat 7, that is, the shape of the limiting groove 11, not only adapts to the movement of the waist support part 3 but also limits the movement trajectory of the sliding rotating part 8.

[0055] like Figure 3 , 7As shown in , 9, the seat support 1 is arranged on the chassis 4 through a lifting linkage mechanism, and the lifting linkage mechanism drives the seat support 1 to rise as the back support 2 reclines, and when the back support 2 reclines, the upper end of the lumbar support 3 moves backward and downward, and the lower end of the lumbar support 3 moves upward; the seat support 1 is movably arranged on the chassis 4, and when it is switched from a sitting support state to a lying support state, the lifting movement of the seat support 1 can make the rotation angle of the lumbar support 3 larger, thereby achieving more reasonable lumbar support; specifically, the lifting linkage mechanism includes a seesaw 12, the rear end of the seesaw 12 is relatively fixedly connected to the back support 2, the front end of the seesaw 12 is rotatably connected to the seat support 1, and the middle part of the seesaw 12 is rotatably connected to the chassis 4; the lifting linkage mechanism also includes a guide portion 13, which is installed below the seat support 1, and the guide portion 13 is rotatably connected to the front end of the seesaw 12 Dynamic connection; the chassis 4 is open upward and backward and hollow, the guide part 13 is arranged in the chassis 4 from top to bottom, and a guide member 14 and a guide groove 15 are arranged between the guide part 13 and the chassis 4, the guide member 14 is arranged in the guide groove 15, and the guide groove 15 is inclined upward from front to back, and the guide part 13 is configured so that when the backrest is reclined, the guide member 14 moves in the guide groove 15 and provides guidance for the movement direction of the seat support 1; the back support 2 and the seat support 1 are linked by the seesaw 12, and the rise and fall of the back support 2 relative to the chassis 4 can also be directly driven by the backrest reclining, without additional manual operation, and the back support 2, the waist support 3 and the seat support 1 in the seat are all in a linkage relationship; the guide member 14 and the guide groove 15 limit the movement trajectory of the seat support 1, making the linkage of the back support 2, the waist support 3 and the seat support 1 more reasonable. In addition to using the solution of this embodiment, the lifting linkage mechanism can also be replaced by a lifting connecting rod assembly to achieve the same effect. The lifting linkage mechanism of this embodiment has a simpler structure.

[0056] The seat support 1 is arranged on the chassis 4, and the back support 2 is rotatably connected to the chassis 4. By adding the chassis 4 to the above-mentioned seat support 1, back support 2, and lumbar support 3, the diversity of movement is realized, that is, when the chassis 4 is fixed as a basis, the back support 2 is rotatably connected to the chassis 4 to realize relative rotation with the seat support 1. A movable connection can also be selectively set between the seat support 1 and the chassis 4, so that the movements of the back support 2 and the seat support 1 are opposite, so that the lumbar support 3 can have a larger rotation angle.

[0057] Furthermore, a rotating frame 16 is provided on the seat support 1, and the rotating frame 16 is relatively fixed to the seat support 1, and the rotating frame 16 is located at the rear of the seat support 1, and the rotating frame 16 extends upward and is rotatably connected to the lumbar support 3; the lumbar support 3 is connected to the rotating frame 16 instead of being directly connected to the seat support 1. On the one hand, the height of the lumbar support 3 is raised, so that the lumbar support 3 has a height similar to that of the existing seat in the sitting support state, achieving the desired function, and at the same time, the lumbar support 3 will not interfere with the seat support 1 when rotating, and the seat support 1 can be effectively avoided; on the other hand, the lumbar support 3 is rotatably connected to the rotating frame 16, which is obviously different from the rotation connection point of the back support 2, and in this case, the lumbar support 3 can be rotated at a larger angle, so that the angle between the lumbar support 3 and the back support 2 is reduced, thereby achieving the desired effect.

[0058] Specifically, the lumbar support member 3 is a frame structure, and the rotating frame 16 includes a fixing portion 161 located at its lower end, and the fixing portion 161 is fixedly connected to the rear end of the seat support member 1 by screws, and two divergent support arms 162 extend from the upper end of the rotating frame 16, and the two support arms 162 extend to the left and right sides respectively and tilt forward and upward, and finally the ends of the support arms 162 are rotatably connected to the middle and lower part of the lumbar support member 3 through a rotating shaft; in this embodiment, the rotating frame 16 and the lumbar support member 3 are rotatably connected to the middle or middle and lower part of the lumbar support member 3, and the rotating frame 16 and the lumbar support member 3 are rotatably connected to the lower end of the lumbar support member 3, which can also achieve better lumbar support than the prior art, but the selection effect of this embodiment is better, the lower end of the lumbar support member 3 is vacant and located below the rotation connection point of the lumbar support member 3 and the rotating frame 16, and the lower end of the lumbar support member 3 can extend forward under the human waist for support in the lying support state, so as to provide more comfortable lumbar support.

[0059] like Figure 2 , 6As shown in 10-12, the back support member 2 and the lumbar support member 3 form a supporting surface that fits the waist and back of the human body, and the seat support member 1 forms a seat surface that fits the buttocks of the human body. The supporting surface and the seat surface form a continuous fitting surface, and the fitting surface fits both the buttocks and the waist and back of the human body; because the existing chair backs are often curved backwards to improve comfort, so that the human body sinks into it and feels wrapped, in order to more accurately describe the fit between the chair back and the waist and back of the human body, the supporting surface has a reference line 17, and the reference line 17 is located in the middle of the supporting surface in the left and right direction, and the reference line 17 is a line connecting the upper end of the back support member 2 to the lower end of the lumbar support member 3 on the supporting surface; in the sitting support state, the reference line 17 is The lower part is an S-shaped curve with a convex front. In the lying support state, the reference line 17 is roughly a straight line with a certain arc bending backwards; specifically, the reference line 17 reflects the overall state of the supporting surface. In the sitting support state, the reference line 17 is an S-shaped curve with a convex front at the lower part, that is, in the sitting support state, the lumbar support member 3 protrudes forward relative to the back support member 2, and is used to press forward on the human waist to fit the S-shaped waist and back curve of the human body when sitting normally; in the lying support state, the reference line 17 is roughly a straight line, that is, in the lying support state, the angle between the lumbar support member 3 and the back support member 2 is reduced, and the shape of the supporting surface is changed to fit the linear waist and back curve of the human body when lying down.

[0060] In addition, when switching from the sitting support state to the lying support state, the supporting surface is close to the seat surface; when switching from the sitting support state to the lying support state, the supporting surface is close to the seat surface, which means that when the sitting support state is switched to the lying support state, the lumbar support 3 rotates, and its lower end is close to the seat support 1, unlike a conventional seat where the lumbar support 3 is far away from the seat support 1, so that the lumbar support 3 and the seat support 1 will not separate to form a gap, thereby preventing the waist from being empty when the human body lies down.

[0061] In this embodiment, in the sitting support state and the lying support state, the fitting surface is continuous rather than disconnected, so that the buttocks, waist and back of the human body can all be against the fitting surface, and the buttocks and waist and back of the human body can all be effectively and reasonably supported without the condition of an empty waist.

[0062] Although the human waist and back are roughly straight, it is not advisable that the supporting surfaces of the lumbar support 3 and the back support 2 are completely straight. In the double-back structure, the reference line 17 at the back support 2 is generally straight, and the reference line 17 at the lumbar support 3 is also straight. An angle will be generated between the lumbar support 3 and the seat surface, without a smooth transition, and there will be a gap below the waist. If a rounded and concave lumbar support 3 is designed for lying, the effect of the lumbar support 3 convexly fitting and supporting when sitting normally will be lost, which is not worth the loss. Therefore, in this embodiment, a conventional convex lumbar support 3 is used to ensure comfortable waist support in normal sitting posture. In the sitting support state, the human waist is pressed against the middle and upper part of the lumbar support 3. The back support 2 is a kind of back support component, which is used for supporting the waist and back of the human body. When the sitting support state is switched to the lying support state, the lumbar support 3 and the back support 2 rotate relative to each other, thereby changing the shape of the supporting surface. The waist of the human body is supported by the middle and lower parts of the lumbar support 3, which relieves the convexity of the lumbar support 3, so that the lumbar support 3 and the back support 2 are roughly straight to fit the waist and back of the human body; that is, the supporting surface of the lumbar support 3 is more smoothly transitioned to the supporting surface of the back support 2, while the lumbar support 3 still has a certain convexity to fill the gap and maintain sufficient waist support. The shape of the supporting surface is more straight, and the reference line 17 has a slight backward bend, so that the waist and back of the human body remain roughly straight and rest reasonably and comfortably on the back support 2 and the lumbar support 3.

[0063] Regarding the rotation angle, specifically, when switching from the sitting support state to the lying support state, the rotation angle of the lumbar support 3 is greater than the rotation angle of the back support 2; in this way, the angle between the lumbar support 3 and the back support 2 can be reduced; the reason why the rotation angle of the lumbar support 3 is greater than the rotation angle of the back support 2 is that the rotation connection points of the lumbar support 3 and the back support 2 are different, the back support 2 is rotationally connected to the chassis 4, and the lumbar support 3 is rotationally connected to the rotating frame 16 on the seat support 1.

[0064] Furthermore, if Fig.11 , 12 As shown, in the lying support state, the inclination angle of the lumbar support member 3 relative to the ground is 13-20°. In the present embodiment, in the lying support state, the inclination angle of the lumbar support member 3 relative to the ground is 14°; in the sitting support state, the angle between the lumbar support member 3 and the seat support member 1 is 115-120°, and in the lying support state, the angle between the lumbar support member 3 and the seat is 158-165°. In the present embodiment, the angle between the lumbar support member 3 and the seat in the sitting support state is 116°, and in the lying support state, the angle between the lumbar support member 3 and the seat is 160°; the rotation angle of the lumbar support member 3 is 43-50°. In the present embodiment, the rotation angle of the lumbar support member 3 is 44°.

[0065] The lumbar support 3 is tilted more toward the ground than the conventional seat, so that the user can feel more comfortable when the lumbar support 3 is in a straight line.

Claims

1. An ergonomic waist support assembly, characterized in that: include: a seat support configured to support a buttocks of a human body; A waist support member configured to support the waist of a human body; The lumbar support is rotatably connected to the seat support; The lumbar support has a sitting support state and a lying support state. In the sitting support state, the lumbar support faces forward, and the front part of the lumbar support is located below the rear part of the lumbar support. When the sitting support state is switched to the lying support state, the rear part of the lumbar support rotates downward relative to the front part of the lumbar support. In the lying support state, the lumbar support faces upward, and the lumbar support supports the human waist from bottom to top.

2. The ergonomic lumbar support assembly according to claim 1, characterized in that: In the lying support state, the lumbar support member has an inclination angle of 13-20° relative to the ground.

3. The ergonomic lumbar support assembly according to claim 1, characterized in that: In the sitting support state, the angle between the lumbar support and the seat support is 115-120°, and in the lying support state, the angle between the lumbar support and the seat is 158-165°.

4. The ergonomic lumbar support assembly according to claim 1, characterized in that: The rotation angle of the lumbar support is 43-50°.

5. The ergonomic lumbar support assembly according to claim 1, characterized in that: A vertical rotating frame is fixedly connected to the rear end of the seat support member. The rotating frame protrudes upward from the upper surface of the seat support member, and the waist support member is rotatably connected to the rotating frame.

6. The ergonomic lumbar support assembly according to claim 1, characterized in that: The lower end of the lumbar support is suspended, and when the sitting support state is switched to the lying support state, the lower end of the lumbar support moves from back to front and approaches the seat support, and the distance between the lower end of the lumbar support and the seat support is reduced.

7. The ergonomic lumbar support assembly according to claim 6, characterized in that: The seat support is bent downward from the middle part to the rear end part.

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