Seat capable of improving comfort of waist and back

Abstract

The utility model provides a seat capable of improving the comfort of the waist and the back. A back support is rotationally connected to the chair seat, and the upper bearing piece is rotationally arranged relative to the chair seat by being connected to the back support; the lower bearing piece is configured to bear the waist of the human body, a rotating seat is arranged on the chair seat, the lower bearing piece is rotationally arranged on the rotating seat and is rotationally arranged relative to the chair seat, a connecting rod piece is arranged between the back support and the lower bearing piece, one end of the connecting rod piece is rotationally connected with the lower bearing piece, and the other end of the connecting rod piece is rotationally connected with the back support; the lower bearing piece and the upper bearing piece rotate and move relatively through the connecting rod piece. The upper bearing piece and the lower bearing piece are configured to drive the lower bearing piece to rotate on the rotating seat when the upper bearing piece rotates backwards relative to the chair seat, and meanwhile, the lower bearing piece rotates and moves relative to the upper bearing piece; the change of the bearing surface caused by the linkage of the waist and the back is realized so as to fit the curves of the waist and the back of a human body in different states.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a seat for improving the comfort of the waist and back. Background Art

[0002] There are many categories of existing traditional seating, and many manufacturers focus on the field of office chairs. Focusing on ergonomics and the goal of improving comfort, office chairs are becoming more and more versatile, such as seat adjustment, armrest adjustment, headrest adjustment, and backrest adjustment, etc., all to allow users to have a sitting posture that suits them and get a comfortable sitting experience.

[0003] However, for users, lumbar comfort is one of the most important feelings. Many existing seats improve the lumbar comfort of the human body when sitting by providing a convex lumbar support, but often ignore the lumbar comfort of the user when lying on the chair; in the existing seats, the lumbar support is connected to the backrest, and when the backrest tilts backward, the lumbar support also tilts in the same way, and the rotation angles of the two are the same, and the lumbar and back support surface formed by the backrest and the lumbar support does not change. For users, the support surface used for sitting is not suitable for lying, and the lumbar support that is comfortable when sitting reduces the lumbar comfort when lying; how to improve the lumbar comfort when sitting and lying is the problem we need to solve. Summary of the invention

[0004] The utility model provides a kind of sitting equipment which improves the comfort of waist and back, including a chair seat, an upper supporting member and a lower supporting member, a rotating back support is arranged on the chair seat, the upper supporting member is connected with the back support, a rotating seat is arranged on the chair seat, and the lower supporting member is rotatably connected with the supporting seat; a connecting rod member rotatably connected with the lower supporting member and the back support is arranged between the lower supporting member and the back support, so that the upper supporting member and the lower supporting member can rotate relative to the chair seat, and the lower supporting member and the upper supporting member can rotate and move relative to each other, so that when the waist is leaning back, the relative posture of the lower supporting member and the upper supporting member changes, so that the changed lower supporting member and the upper supporting member can better conform to the waist and back curve of the human body when lying down, thereby improving the comfort of the waist when sitting or lying down.

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

[0006] A seat for improving the comfort of waist and back, comprising:

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

[0008] The upper supporting member is configured to support the back of a human body, a back support is rotatably connected to the seat, and the upper supporting member is rotatably arranged relative to the seat by being connected to the back support;

[0009] The lower supporting member is configured to support the waist of a human body, a rotating seat is provided on the seat, the lower supporting member is rotatably arranged on the rotating seat and is relatively rotatable with the seat, a connecting rod is provided between the back support and the lower supporting member, one end of the connecting rod is rotatably connected to the lower supporting member, and the other end of the connecting rod is rotatably connected to the back support, and the lower supporting member is relatively rotatable and relatively movable with the upper supporting member through the connecting rod;

[0010] The upper supporting member and the lower supporting member are configured so that when the upper supporting member rotates backward relative to the seat, the lower supporting member is driven to rotate on the rotating seat, and at the same time, the lower supporting member rotates and moves relative to the upper supporting member.

[0011] The lower supporting member rotates relative to the seat through the rotating seat, so that the rotating point of the lower supporting member is fixed relative to the sitting support member, but is relatively movable relative to the upper supporting member. Therefore, the change of the supporting surface caused by the waist and back linkage can be realized to fit the waist and back curves of the human body in different states, that is, when the waist is leaning back, the relative posture of the lower supporting member and the upper supporting member changes, so that the changed lower supporting member and the upper supporting member can better fit the waist and back curves of the human body when lying down, thereby improving the waist comfort when sitting and lying down; wherein, the relative rotation and relative movement of the lower supporting member and the upper supporting member are realized by the connecting rod member, and the back bracket (and the upper supporting member), the seat (and the rotating seat), the lower supporting member and the connecting rod member constitute a four-bar linkage with smooth movement to achieve the waist and back linkage effect, and can change the inclination angle and relative position of the lower supporting member relative to the upper supporting member, that is, change the relative posture of the lower supporting member and the upper supporting member.

[0012] Preferably, the rotating seat is located at the rear of the seat, and the rotating seat includes two arms that diverge and extend upward and forward, and the lower supporting member is rotatably connected to the ends of the two arms, and the two arms are connected to the middle and lower parts of the lower supporting member; when the upper supporting member rotates backward relative to the seat, the upper end of the lower supporting member rotates backward, the front end of the lower supporting member rotates forward, and the upper supporting member moves backward away from the lower supporting member. The lower end of the lower supporting member is vacant and located below the rotation connection point between the lower supporting member and the rotating seat, and the lower end of the lower supporting member can extend forward to the lower part of the human waist for support when the upper supporting member tilts backward, so as to provide more comfortable waist support and further improve waist comfort.

[0013] Preferably, the lower end of the connecting rod is rotatably connected to the lower part of the back support, and the upper end of the connecting rod is rotatably connected to the upper part of the lower supporting member.

[0014] A seat for improving the comfort of waist and back, comprising:

[0015] A seat configured to support a buttocks of a human body;

[0016] The upper supporting member is configured to support the back of a human body, a back support is rotatably connected to the seat, and the upper supporting member is rotatably arranged relative to the seat by being connected to the back support;

[0017] The lower supporting member is configured to support the waist of a human body, and a rotating seat is provided on the seat. The lower supporting member is rotatably arranged on the rotating seat and is relatively rotatable with the seat; a buffer assembly is provided on the lower supporting member, and the buffer assembly is convexly arranged on the lower supporting member. The buffer assembly is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to the back support; the connecting rod is configured to enable the lower supporting member to rotate and move relatively with the upper supporting member, and the buffer assembly is configured to enable the lower supporting member to float in the length direction of the buffer assembly;

[0018] When the upper supporting member rotates backward relative to the seat, the lower supporting member is driven to rotate on the rotating seat. At the same time, the lower supporting member rotates and moves relative to the upper supporting member, and the lower supporting member generates adaptive floating due to the buffer assembly.

[0019] This solution allows the lower supporting member to change its posture relative to the upper supporting member when the upper supporting member leans back, while also having the ability of floating buffering. The buffering component allows the lower supporting member to be in a floating state. On the one hand, it allows the lower supporting member to have elastic buffering, which makes the human waist more comfortable when leaning on it. On the other hand, it can reduce the possibility of movement restriction or interference when the waist and back are linked, thereby increasing the adaptability of the lower supporting member when the waist and back are linked.

[0020] Preferably, the buffer assembly includes a base and a socket, the socket is protruding from the lower supporting member, the socket is inserted into the base, the socket and the base are slidably matched, and the base is rotatably connected to the connecting rod. The sliding direction of the socket and the base is the floating direction of the lower supporting member.

[0021] Preferably, a waist-shaped hole is provided on the socket, the connecting rod is rotatably connected to the base through a motion shaft, and the motion shaft is inserted into the waist-shaped hole; the buffer assembly also includes a spring, the socket is hollow, the spring is arranged in the socket, the spring acts on the motion shaft and the socket and gives the lower supporting member a forward elastic force. The cooperation of the waist-shaped hole and the motion shaft realizes the possibility of movement between the socket and the base, defines the trajectory of movement of the two, and also prevents the socket from being separated from the base. The cooperation of the waist-shaped hole and the motion shaft realizes the possibility of movement between the socket and the base, defines the trajectory of movement of the two, and also prevents the socket from being separated from the base.

[0022] Preferably, the socket and the lower supporting member are integrally formed.

[0023] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0024] The lower supporting member rotates relative to the seat through the rotating seat, so that the rotating point of the lower supporting member is fixed relative to the sitting support member, but is relatively movable relative to the upper supporting member. Therefore, the change of the supporting surface caused by the waist and back linkage can be realized to fit the waist and back curves of the human body in different states, that is, when the waist is leaning back, the relative posture of the lower supporting member and the upper supporting member changes, so that the changed lower supporting member and the upper supporting member can better fit the waist and back curves of the human body when lying down, thereby improving the waist comfort when sitting and lying down; wherein, the relative rotation and relative movement of the lower supporting member and the upper supporting member are realized by the connecting rod member, and the back bracket (and the upper supporting member), the seat (and the rotating seat), the lower supporting member and the connecting rod member constitute a four-bar linkage with smooth movement to achieve the waist and back linkage effect, and can change the inclination angle and relative position of the lower supporting member relative to the upper supporting member, that is, change the relative posture of the lower supporting member and the upper supporting member.

[0025] The buffer component allows the lower supporting part to be in a floating state. On the one hand, it allows the lower supporting part to have elastic buffering, making it more comfortable when the human waist leans on it. On the other hand, it can reduce the possibility of movement restriction or interference when the waist and back are linked, thereby increasing the adaptability of the lower supporting part when the waist and back are linked. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the seat in the initial state of the embodiment of the utility model when the seat depth is the shallowest;

[0027] Figure 2 It is a side view of the seat in the initial state of the embodiment of the utility model when the seat depth is the shallowest;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the seat in the embodiment of the utility model when the seat depth is the shallowest in the reclining state;

[0029] Figure 4 It is a side view of the seat of the utility model in the reclining state when the seat depth is the shallowest;

[0030] Figure 5 It is a schematic diagram of the seat in the embodiment of the present invention switching between the deepest seat depth and the shallowest seat depth;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the seat in the initial state of the embodiment of the utility model when the seat depth is the deepest;

[0032] Figure 7 It is a side view of the seat of the utility model in the initial state of the embodiment when the seat depth is the deepest;

[0033] Figure 8It is a schematic diagram of the three-dimensional structure of the seat in the embodiment of the utility model when the seat depth is the deepest in the reclining state;

[0034] Fig. 9 It is a side view of the seat of the utility model in the reclining state in the embodiment, with the seat depth at its deepest;

[0035] Fig.10 This is a schematic diagram of the seat in the initial state of the embodiment of the present invention when the seat depth is the shallowest;

[0036] Fig.11 It is a schematic diagram of the seat in the embodiment of the utility model when the seat depth is the shallowest in the reclining state;

[0037] Fig.12 It is a schematic diagram of the seat in the initial state of the embodiment of the utility model when the seat depth is the deepest;

[0038] Fig.13 It is a schematic diagram of the seat in the embodiment of the utility model when the seat depth is the deepest in the reclining state;

[0039] Fig.14 It is a three-dimensional structural schematic diagram of a buffer assembly arranged between the lower supporting member and the connecting rod member in the embodiment of the utility model;

[0040] Fig.15 It is a cross-sectional view of a buffer assembly provided between the lower supporting member and the connecting rod member in an embodiment of the utility model;

[0041] Fig.16 It is a schematic diagram of the three-dimensional structure of the lower supporting member in the embodiment of the utility model;

[0042] Fig.17 It is a schematic diagram of the three-dimensional structure in which the seesaw, the tray and the guide part are connected in the embodiment of the utility model.

[0043] The reference numerals of the figures are as follows: seat 1; upper supporting member 2; lower supporting member 3; tray 4; connecting rod member 5; back bracket 6; rocker 12; guide portion 13; guide member 14; guide groove 15; rotating seat 16; fixing portion 161; support arm 162; first hinge point A; second hinge point B; third hinge point C; fourth hinge point D; seat support member 101; back frame 201; slide plate 18; bottom plate 19; base 20; socket 21; waist-shaped hole 22; spring 23. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] The specific implementation of the utility model is as follows:

[0048] like Figure 1 , 3 As shown in Figures 5, 6 and 8, the utility model provides a seat for improving the comfort of the waist and back, comprising a seat 1, an upper supporting member 2 and a lower supporting member 3, the seat comprising a seat support 101 and a tray 4, the seat 1 is configured to support the buttocks of a human body, the upper supporting member 2 is configured to support the back of a human body, the upper supporting member 2 and the seat 1 are rotatably arranged relative to each other, the lower supporting member 3 is configured to support the waist of a human body, the lower supporting member 3 is rotatably connected to the seat 1, and the lower supporting member 3 is also rotatably connected to the upper supporting member 2; the seat 1 is arranged on the tray 4, the upper supporting member 2 is rotatably connected to the tray 4 to achieve a relative rotation arrangement with the seat 1, the rotation point of the upper supporting member 2 and the tray 4 is the third hinge point C, when the upper supporting member 2 and the tray 4 rotate, the upper supporting member 2 rotates relative to the seat 1, and the lower supporting member 3 also rotates relative to the upper supporting member 2 and the seat 1.

[0049] The waist-back linkage seat achieves waist-back linkage with high comfort and strong waist support by the following method: the upper supporting member is arranged to be rotatably connected to the bottom of the seat, the lower supporting member is rotatably connected to the seat, the upper supporting member and the waist-back supporting member are rotatably connected to the seat respectively, and a first hinge point A is formed between the lower supporting member and the seat, the lower supporting member and the upper supporting member are arranged to rotate and move relative to each other, and a second hinge point B is formed between the lower supporting member and the upper supporting member;

[0050] The upper supporting member has an initial state and a reclining state. When the upper supporting member rotates backward relative to the seat to the reclining state, the lower supporting member is synchronously linked. When the lower supporting member rotates backward relative to the seat, the lower supporting member also generates relative rotation and relative movement with the upper supporting member. At this time, the angle between the lower supporting member and the upper supporting member decreases, the position of the first hinge point A remains unchanged, and the second hinge point B is away from the upper supporting member relative to the initial state so that the lower supporting member is positioned closer to the front relative to the upper supporting member.

[0051] Since the upper supporting member and the lower supporting member are independently rotatably connected to the seat, that is, the rotation connection point of the upper supporting member and the seat does not coincide with the first hinge point A, when the upper supporting member and the lower supporting member move, the two rotate around different rotation points, so that the lower supporting member and the upper supporting member produce relative movement, which is the basis for changing the waist and back support curve of the seat in different states, and is also the basis for improving the waist support; further, when the upper supporting member and the lower supporting member move, although the upper supporting member only rotates relative to the seat, according to the existing technology and actual objects, we can also know that for the area on the upper supporting member that supports the back, when the upper supporting member rotates, this area moves backward and downward, while the lower supporting member The first hinge point A between the lower supporting member and the seat remains relatively still, and the movement of the lower supporting member can only be rotation around the first hinge point A; and a second hinge point B that can move relative to the upper supporting member is provided between the lower supporting member and the upper supporting member, for one purpose, to realize the linkage between the upper supporting member and the lower supporting member, and secondly, to cooperate with the first hinge point A to prevent the lower supporting member from being moved by the upper supporting member and forming a large relative displacement with the seat, thereby maintaining a roughly unchanged support height of the lower supporting member. Due to the relative displacement between the upper supporting member and the seat, its support height will change, while the support height of the lower supporting member remains roughly unchanged, which will cause a change in the waist and back support curve formed by the upper supporting member and the lower supporting member.

[0052] Specifically, from the perspective of the supporting positions of the upper and lower supporting members in the front-to-back direction, in the initial state, that is, when the human body is sitting normally, the supporting position of the lower supporting member is further forward and the position of the upper supporting member is further backward, thus generating a supporting curve that fits the S-shaped waist and back curve of the human body when sitting; from the perspective of the supporting heights of the upper and lower supporting members, in the initial state, the supporting height of the lower supporting member is lower than the supporting height of the upper supporting member. After the upper and lower supporting members are rotated successively, the supporting height of the upper supporting member is significantly reduced, while the supporting height of the lower supporting member is only slightly reduced due to the unchanged first hinge point A. It is precisely because of the change in the relative heights of the two that the supporting curve in the reclining state is more in line with the roughly linear waist and back curve of the human body when lying down. Therefore, this method can ergonomically improve the support of the seat to the waist, so that the waist can be reasonably and effectively supported, and there will be no feeling of empty waist, which greatly improves the comfort of use and avoids health risks to the human waist.

[0053] In the initial state of the upper supporting member, the upper supporting member 2 and the lower supporting member 3 are vertical and both face forward, so that a human body can sit normally; when the upper supporting member is in the reclining state, the upper supporting member 2 leans backward and the lower supporting member 3 is inclined and faces upward, so that a human body can lie down; when switching from the initial state to the reclining state, the upper supporting member 2 rotates backward relative to the seat 1, and the lower supporting member 3 moves with the upper supporting member 2 leaning backward, and the angle between the lower supporting member 3 and the upper supporting member 2 decreases, and the front end of the lower supporting member 3 is always located above the seat 1.

[0054] As more and more seats with similar functions appear, the design focus and mainstream are gradually shifting from manual adjustment to linkage. Compared with adjustments that require manual operation, the linkage of mechanisms 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 armrests and other parts 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 can drive the chair back to move when lying down. Therefore, the use of linkage is more reasonable and more convenient.

[0055] Furthermore, the upper supporting member 2 is rotatably arranged relative to the seat 1, and the upper supporting member 2 has a basic reclining function. The lower supporting member 3 is rotatably connected to the seat 1 and the upper supporting member 2. When a human body leans on it, the upper supporting member 2 can drive the lower supporting member 3 to rotate relative to the seat 1, thereby realizing switching between the initial state and the reclining state. Since the lower supporting member 3 is directly or indirectly rotatably connected to the seat 1, the lower supporting member 3 and the seat 1 will not produce relative displacement movement in the front and rear directions. The front end of the lower supporting member 3 is always located above the seat 1, and there is no gap between the seat 1 and the lower supporting member 3, which can fully and continuously support the human waist and back, so that the waist is reasonably and effectively supported without a feeling of empty waist.

[0056] In the initial state, the upper supporting member 2 and the lower supporting member 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 reclining state, the angle between the lower supporting member 3 and the upper supporting member 2 decreases, and the curved surface formed by the two changes and can fit the roughly straight waist and back curve of the human body when leaning back. Therefore, when the human body sits or lies normally, the curved surfaces formed by the lower supporting member 3 and the upper supporting member 2 conform to the ergonomics in their respective states to provide a better comfortable sitting and lying feeling.

[0057] In order to realize the linkage between the upper supporting member 2 and the lower supporting member 3, it is also necessary to set a connecting rod member 5 between the upper supporting member 2 and the lower supporting member 3 and / or allow the seat 1 to be movably set on the tray 4; the lower supporting member 3 is rotatably connected with the upper supporting member 2 and the seat 1, the upper supporting member 2 is rotatably connected with the tray 4, and the seat 1 is set on the tray 4. If the upper supporting member 2 and the tray 4 are relatively fixed, and the lower supporting member 3 is only rotatably connected with the upper supporting member 2 and the seat 1, then when the upper supporting member 2 leans back to drive the lower supporting member 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 connecting rod member 5 is provided between the upper supporting member 2 and the lower supporting member 3, and the seat 1 is set on the tray 4 through a lifting linkage mechanism.

[0058] Specifically, a connecting rod 5 is provided between the upper supporting member 2 and the lower supporting member 3, and the upper supporting member 2 and the lower supporting member 3 are relatively movable via the connecting rod 5; when the upper supporting member 2 rotates backward relative to the seat 1, the lower supporting member 3 and the upper supporting member 2 rotate relative to each other and the lower supporting member 3 and the upper supporting member 2 move away from each other; a connecting rod 5 is provided between the upper supporting member 2 and the lower supporting member 3 to enable the two to move relative to each other, so that the movement among the lower supporting member 3, the upper supporting member 2 and the seat 1 can be carried out smoothly.

[0059] Specifically, if Figure 1-9 As shown, the connecting rod 5 is a connecting rod, one end of which is rotatably connected to the lower supporting member 3, and the other end of the connecting rod 5 is rotatably connected to the upper supporting member 2. Specifically, the lower end of the connecting rod 5 is rotatably connected to the lower part of the back bracket 6 in the upper supporting member 2, and the rotation point of the connecting rod 5 and the back bracket 6 is the fourth hinge point D; the upper end of the connecting rod 5 is rotatably connected to the upper part of the lower supporting member 3, and the rotation connection point of the two is the second hinge point B; the connecting rod 5, the upper supporting member 2, the lower supporting member 3 and the seat 1 constitute a four-bar mechanism to achieve a waist-back linkage effect; the connecting rod 5 is connected to the lower part of the back bracket 6 instead of the back frame 201, in order to allow the connecting rod 5 to have enough space for movement. The space between the back frame 201 and the lower supporting member 3 is too small, which is not conducive to the movement of the connecting rod and there is also a hidden danger of movement interference.

[0060] Furthermore, if Figure 5As shown, a slide plate 18 is installed at the lower part of the seat support 101, and the slide plate 18 is slidably arranged on a bottom plate 19, and the bottom plate 19 is installed on the tray 4. When the seat support 101 is lifted and lowered on the tray 4 by the lifting mechanism, the bottom plate 19, the slide plate 18 and the seat support 101 move together. When the seat support 101 moves forward and backward relative to the tray 4, the slide plate 18 slides relative to the bottom plate 19; the seat support 101 is configured to support the buttocks of a human body for a human body to sit on, and the seat support 101 slides on the tray 4 to adjust the seat depth; when the seat support 101 slides relative to the tray 4, the second hinge point B moves accordingly, and the connecting rod 5 and the lower supporting member 3 rotate adaptively. ; When the seat support 101 moves forward, the lower supporting member 3 rotates and increases the inclination angle of the lower supporting member 3, and the angle between the lower supporting member 3 and the upper supporting member 2 decreases; the adaptation of the seat depth adjustment and the rotation of the lower supporting member 3 is realized, and even if the seat depth adjustment is performed, it will not interfere with the linkage between the lower supporting member 3 and the upper supporting member 2, and the lumbar support can still be improved by the above method; when the seat depth is adjusted, the second hinge point B moves, the lower supporting member 3 is pulled, and the connecting rod 5 can only rotate adaptively, so that the connecting rod 5, the lower supporting member 3, the seat 1 and the upper supporting member 2 still constitute a four-bar linkage; the seat depth adjustment can make the seat practical for people of more body shapes.

[0061] Furthermore, if Figure 14-16 As shown, a buffer assembly is provided between the connecting rod 5 and the lower supporting member 3, and the buffer assembly includes a base 20; a socket 21 is convexly provided on the upper part of the lower supporting member 3, the socket 21 is inserted into the base 20, the socket 21 and the base 20 are slidably matched, and the base 20 is rotatably connected to the connecting rod 5; a waist-shaped hole 22 is opened on the socket 21, and the connecting rod 5 is rotatably connected to the base 20 through a motion shaft (not shown), and the motion shaft is inserted into the waist-shaped hole 22; the buffer assembly also includes a spring 23, the socket 21 is hollow, the spring 23 is arranged in the socket 21, and the spring 22 is provided in the socket 21. 3 acts on the motion axis and the socket 21 and gives the lower supporting member 3 a forward elastic force; the buffer component allows the lower supporting member to be in a floating state, which, on the one hand, allows the lower supporting member 3 to have elastic buffering, making it more comfortable when the human waist leans on it, and on the other hand, it can reduce the possibility of movement restriction or interference when the waist and back are linked, thereby increasing the self-adaptability of the lower supporting member 3 when the waist and back are linked; and the cooperation of the waist-shaped hole 22 and the motion axis realizes the possibility of movement of the socket 21 and the base 20, stipulates the trajectory of movement of the two, and also prevents the socket 21 from being detached from the base 20.

[0062] like Figure 4 , 9As shown in 17, the seat 1 is arranged on the tray 4 through a lifting linkage mechanism, and the lifting linkage mechanism drives the seat 1 to rise as the upper supporting member 2 reclines. When the upper supporting member 2 reclines, the upper end of the lower supporting member 3 moves backward and downward, and the lower end of the lower supporting member 3 moves upward; the seat 1 is movably arranged on the tray 4, and when it is switched from the initial state to the reclining state, the lower supporting member 3 can be rotated at a larger angle through the lifting movement of the seat 1, 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 upper supporting member 2, the front end of the seesaw 12 is rotatably connected to the seat 1, and the middle part of the seesaw 12 is rotatably connected to the tray 4; the lifting linkage mechanism also includes a guide portion 13, the guide portion 13 is installed below the seat 1, and the guide portion 13 is rotatably connected to the front end of the seesaw 12 The tray 4 is open upward and backward and is hollow. The guide part 13 is arranged in the tray 4 from top to bottom. A guide member 14 and a guide groove 15 are arranged between the guide part 13 and the tray 4. The guide member 14 is arranged in the guide groove 15. The guide groove 15 is inclined upward from front to back. 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 1. The upper supporting member 2 and the seat 1 are linked by the seesaw 12. The rise and fall of the upper supporting member 2 relative to the tray 4 can also be driven directly by the backrest reclining without additional manual operation. The upper supporting member 2, the lower supporting member 3 and the seat 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 1, making the linkage of the upper supporting member 2, the lower supporting member 3 and the seat 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.

[0063] The seat 1 is arranged on the tray 4, and the upper supporting member 2 is rotatably connected to the tray 4. By adding the tray 4 to the seat 1, the upper supporting member 2, and the lower supporting member 3 of the above-mentioned mechanism, the diversity of movement can be achieved, that is, when the tray 4 is fixed as a basis, the upper supporting member 2 is rotatably connected to the tray 4 to achieve relative rotation with the seat 1. A movable connection can also be selectively set between the seat 1 and the tray 4, so that the upper supporting member 2 and the seat 1 The movement is opposite, so that the lower supporting member 3 can have a larger rotation angle.

[0064] Furthermore, a rotating seat 16 is provided on the seat 1, and the rotating seat 16 is relatively fixed to the seat 1, and the rotating seat 16 is located at the rear part of the seat 1, and the rotating seat 16 extends upward and is rotatably connected to the lower supporting member 3; the lower supporting member 3 is connected to the rotating seat 16 instead of being directly connected to the seat 1. On the one hand, the height of the lower supporting member 3 is raised, so that the lower supporting member 3 has a height similar to that of the existing seat in the initial state, thereby achieving the desired function, and at the same time, the lower supporting member 3 will not interfere with the seat 1 when rotating, and the seat 1 can be effectively avoided; on the other hand, the lower supporting member 3 is rotatably connected to the rotating seat 16, which is obviously different from the rotating connection point of the upper supporting member 2, and in this case, the lower supporting member 3 can be rotated at a larger angle, so that the angle between the lower supporting member 3 and the upper supporting member 2 is reduced, thereby achieving the desired effect.

[0065] Specifically, the lower supporting member 3 is a frame structure, and the rotating seat 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 1 by screws. The rotating seat 16 includes two branched support arms 162 extending upward and forward, 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 lower supporting member 3 through a rotating shaft; in this embodiment, the rotating seat 16 and the lower supporting member 3 are rotatably connected to the middle or lower middle part of the lower supporting member 3, and the rotating seat 16 and the lower supporting member 3 are rotatably connected to the lower end of the lower supporting 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 lower supporting member 3 is vacant and located below the rotation connection point between the lower supporting member 3 and the rotating seat 16, and the lower end of the lower supporting member 3 can extend forward to the lower part of the human waist for support in the reclining state, so as to provide more comfortable lumbar support.

[0066] The upper supporting member 2 and the lower supporting member 3 form a supporting surface that fits the waist and back of the human body, and the chair seat 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. Since 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. The reference line is in the left and right direction and is located in the middle of the supporting surface. The reference line is a line connecting the upper end of the upper supporting member 2 to the lower end of the lower supporting member 3 on the supporting surface. In the initial state, the reference line is the lower In the reclining state, the reference line is roughly a straight line with a certain backward curvature; specifically, the reference line reflects the overall state of the supporting surface. In the initial state, the reference line is an S-shaped curve with the lower part convex forward, that is, in the initial state, the lower supporting member 3 protrudes forward relative to the upper supporting 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 reclining state, the reference line is roughly a straight line, that is, in the reclining state, the angle between the lower supporting member 3 and the upper supporting 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.

[0067] In addition, when switching from the initial state to the reclining state, the supporting surface is close to the seat surface; when switching from the initial state to the reclining state, the supporting surface is close to the seat surface, which means that when switching from the initial state to the reclining state, the lower supporting member 3 rotates, and its lower end is close to the seat 1, unlike the conventional seat where the lower supporting member 3 is far away from the seat 1, so that the lower supporting member 3 and the seat 1 will not separate to form a gap, thereby preventing the waist from being empty when the human body lies down.

[0068] In this embodiment, in the initial state and the reclining state, the fitting surface is continuous rather than disconnected, so that the buttocks, waist and back of the human body can all be pressed 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.

[0069] Although the human waist and back are roughly in a straight line, it is not advisable for the supporting surfaces of the lower supporting member 3 and the upper supporting member 2 to be completely straight. In the double-back structure, the reference line at the upper supporting member 2 is generally a straight line, and the reference line at the lower supporting member 3 is also a straight line. An angle will be generated between the lower supporting member 3 and the seat surface, without a smooth transition, and there will be a gap below the waist. If the lower supporting member 3 is designed with a rounded concave shape for lying, the effect of the convex fit support of the lower supporting member 3 when sitting normally will be lost, which is not worth the loss. Therefore, in this embodiment, a conventional convex lower supporting member 3 is used to ensure comfortable waist support in normal sitting posture. In the initial state, the human waist is fitted by the middle and upper part of the lower supporting member 3. The lower support member 3 and the upper support member 2 are supported by the support member 3, and when the initial state is switched to the reclining state, the lower support member 3 and the upper support member 2 rotate relative to each other, thereby changing the shape of the supporting surface. The human waist is supported by the middle and lower part of the lower support member 3, alleviating the convexity of the lower support member 3, so that the lower support member 3 and the upper support member 2 are roughly straight to fit the human waist and back; that is, the supporting surface of the lower support member 3 is more smoothly transitioned to the supporting surface of the upper support member 2, while the lower support member 3 still has a certain convexity to fill the gap and maintain sufficient waist support. The shape of the supporting surface is straighter, and the reference line has a slight backward bend, so that the human waist and back remain roughly straight and rest reasonably and comfortably on the upper support member 2 and the lower support member 3.

[0070] The lower support member 3 of the mechanism has an inclination angle relative to the ground in the reclining state that is significantly smaller than the inclination angle of the lower support member 3 in the existing seat, so that the lower support member 3 of the mechanism has a larger inclination angle relative to the vertical plane, and its orientation is closer to supporting the human waist upward; from the initial state to the reclining state, the angle between the lower support member 3 and the seat 1 becomes larger. In the initial state, the angle between the lower support member 3 and the seat 1 is similar to that of a conventional seat, but in the reclining state, the angle between the lower support member 3 and the seat 1 is significantly larger, the lower support member 3 is more inclined, and the orientation of the lower support member 3 tends to be upward, so that the support for the human waist is more reasonable, and the user can get a more comfortable experience; the rotation angle of the lower support member 3 of the mechanism is larger than the rotation angle of the lower support member 3 of the existing seat, and the purpose is to make the lower support member 3 more inclined and more reasonably oriented, so as to support the human waist in a better posture and improve comfort.

Claims

1. A seat for improving the comfort of the waist and back, characterized in that: include: A seat configured to support a buttocks of a human body; The upper supporting member is configured to support the back of a human body, a back support is rotatably connected to the seat, and the upper supporting member is rotatably arranged relative to the seat by being connected to the back support; The lower supporting member is configured to support the waist of a human body, a rotating seat is provided on the seat, the lower supporting member is rotatably arranged on the rotating seat and is relatively rotatable with the seat, a connecting rod is provided between the back support and the lower supporting member, one end of the connecting rod is rotatably connected to the lower supporting member, and the other end of the connecting rod is rotatably connected to the back support, and the lower supporting member is relatively rotatable and relatively movable with the upper supporting member through the connecting rod; The upper supporting member and the lower supporting member are configured so that when the upper supporting member rotates backward relative to the seat, the lower supporting member is driven to rotate on the rotating seat, and at the same time, the lower supporting member rotates and moves relative to the upper supporting member.

2. The seat for improving the comfort of the waist and back according to claim 1, characterized in that: The rotating seat is located at the rear of the seat, and the rotating seat includes two arms that diverge and extend upward and forward. The lower supporting member is rotatably connected to the ends of the two arms, and the two arms are connected to the middle and lower parts of the lower supporting member; when the upper supporting member rotates backward relative to the seat, the upper end of the lower supporting member rotates backward, the front end of the lower supporting member rotates forward, and the upper supporting member moves backward away from the lower supporting member.

3. The seat for improving the comfort of the waist and back according to claim 1, characterized in that: The lower end of the connecting rod is rotatably connected to the lower part of the back support, and the upper end of the connecting rod is rotatably connected to the upper part of the lower supporting member.

4. A seat for improving the comfort of waist and back, characterized in that: include: A seat configured to support a buttocks of a human body; The upper supporting member is configured to support the back of a human body, a back support is rotatably connected to the seat, and the upper supporting member is rotatably arranged relative to the seat by being connected to the back support; The lower supporting member is configured to support the waist of a human body, and a rotating seat is provided on the seat. The lower supporting member is rotatably arranged on the rotating seat and is relatively rotatable with the seat; a buffer assembly is provided on the lower supporting member, and the buffer assembly is convexly arranged on the lower supporting member. The buffer assembly is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to the back support; the connecting rod is configured to enable the lower supporting member to rotate and move relatively with the upper supporting member, and the buffer assembly is configured to enable the lower supporting member to float in the length direction of the buffer assembly; When the upper supporting member rotates backward relative to the seat, the lower supporting member is driven to rotate on the rotating seat. At the same time, the lower supporting member rotates and moves relative to the upper supporting member, and the lower supporting member generates adaptive floating due to the buffer assembly.

5. The seat for improving the comfort of the waist and back according to claim 4, characterized in that: The buffer component comprises a base and a socket, wherein the socket is protruding from the lower supporting member and inserted into the base, the socket and the base are slidably matched, and the base is rotatably connected with the connecting rod member.

6. The seat for improving the comfort of the waist and back according to claim 5, characterized in that: A waist-shaped hole is provided on the socket, and the connecting rod is rotatably connected to the base through a moving shaft, and the moving shaft is inserted into the waist-shaped hole; the buffer component also includes a spring, the socket is hollow, and the spring is arranged in the socket, and the spring acts on the moving shaft and the socket and gives the lower supporting member a forward elastic force.

7. The seat for improving the comfort of the waist and back according to claim 4, characterized in that: The socket is integrally formed with the lower supporting member.

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