A gravity balance adjustment mechanism, a seat, and a gravity balance adjustment method

Abstract

The present application discloses a gravity balancing adjustment mechanism, a seat and a gravity balancing adjustment method, which includes a fixed frame, a seat frame, an adjustment component and a first link component. The seat frame includes a frame-shaped structure composed of a left side frame, a right side frame and a front frame, and the front frame is slidably connected between the left side frame and the right side frame; the adjustment component includes a first driving member, a transmission member and a rotating shaft, and the first link component includes a first lifting link and a first link and a second link that are hinged to each other. Among them, while the adjustment component drives the left side frame and the right side frame to move relative to the driving member through the link component, the adjustment component drives the front frame to move relative to the left side frame and the right side frame through the link component. The gravity balancing adjustment mechanism and seat of the present application can synchronously adjust the angle and softness of the seat to meet the comfort requirements of users.

Description

Technical Field

[0001] The present application relates to the technical field of household furniture, and particularly relates to a gravity balance adjusting mechanism, a seating furniture, and a gravity balance adjusting method. Background Art

[0002] A sofa is one of the essential seating furniture in modern household life. The main function of a sofa is to provide people with a place to sit and rest. With the accelerating pace of life and increasing life pressure, people hope to relax their body muscles when sitting and resting to relieve stress and fatigue. Therefore, there are more demands for seating furniture. However, the existing seating furniture has a single adjustment function and cannot meet the growing functional needs of people.

[0003] Based on the above problems, it is necessary to develop a new type of seating furniture to meet the comfort requirements of users. Summary of the Invention

[0004] To solve the above technical problems, the present application provides a gravity balance adjusting mechanism and a seating furniture, which can synchronously adjust the softness / hardness and sitting / lying angle of the seating furniture to meet the comfort requirements of users.

[0005] In a first aspect, a gravity balance adjusting mechanism adopts the following technical solution: A gravity balance adjusting mechanism includes a fixed frame, and further includes: a seat frame, including a frame structure composed of a left side frame, a right side frame, and a front frame, wherein the front frame is slidably connected between the left side frame and the right side frame; an adjusting assembly, including a first driving member, a transmission member, and a rotating shaft, wherein the first driving member is connected to the fixed frame, one end of the transmission member is connected to the first driving member to transmit power, and the other end of the transmission member is connected to the rotating shaft; a first link assembly, including a first lifting link and a first link and a second link that are hinged to each other, wherein both ends of the first lifting link are respectively hinged to the rotating shaft and the seat frame, the first link is connected to the rotating shaft, and the end of the second link away from the first link is connected to the front frame; wherein, while the adjusting assembly drives the left side frame and the right side frame to move relative to the driving member through the first link assembly, the adjusting assembly drives the front frame to move relative to the left side frame and the right side frame through the first link assembly.

[0006] By adopting the above technical solution, the typical structure of an existing sofa is a sofa upholstery (including sponge and filled silk floss) and a seat spring. The combination of the upholstery and the seat spring basically determines the hardness of the sofa seat cushion, that is, the hardness perceived by people sitting on it. Usually, the force value / displacement, that is, the stiffness index, is used to represent it. Among them, the sofa seat spring is the main influencing factor for hardness perception. Among the various parameters of the sofa seat spring, the height of the upward arch of the sofa seat spring plays a decisive role. Without changing the material and thickness of the sofa spring, changing the shape can affect the hardness of the sofa. The higher the sofa arch, the softer the seat cushion and the better the resilience. The lower the sofa arch, the harder the sofa and the weaker the resilience. The first driving member can synchronously drive the first lifting link, as well as the first link and the second link to rotate through the transmission member and the rotating shaft, so as to realize that the first lifting link drives the seat frame to rotate relative to the fixed frame to adjust the sitting and lying angles, and the first link and the second link push the front frame to realize the movement of the front frame relative to the left frame and the right frame to adjust the shape of the seat spring connected to the front frame to realize the adjustment of the softness and hardness of the seating furniture. By using one driving member to realize the synchronous adjustment of the angle and hardness of the seating furniture, there is no need for the user to perform cumbersome debugging operations, and the comfortable state of the sitting and lying postures of the human body can be adjusted more simply, the muscles are more relaxed, and the user experience is better.

[0007] Combined with the first aspect, a further solution further includes a second driving member. The second driving member includes a fixed end and a pushing end. The fixed end is connected to the seat frame, and the pushing end is connected to the first link.

[0008] By adopting the above technical solution, after the first driving member adjusts the hardness and angle of the seating furniture in place, the second driving member can drive the first link to rotate to adjust the position of the front frame, and adjust the height of the arch of the seat spring by adjusting the position of the front frame, so as to adjust the softness and hardness of the seat spring. Thus, after the seating furniture is adjusted in place, the softness and hardness of the seating furniture can be finely adjusted according to the personal preferences of different user groups to meet the usage requirements of different user groups.

[0009] Combined with the first aspect, a further solution is that the first link is L-shaped, the pushing end is hinged to the end of the first link far from the second link, and the rotating shaft is connected to the first link between the two hinge shafts of the first link.

[0010] By adopting the above technical solution, designing the first link as L-shaped can make the whole structure more compact. The second driving member and the first link can be arranged on the same side of the rotating shaft, and it is more convenient to fixedly assemble the second driving member with the seat frame.

[0011] In combination with the first aspect, a further solution further includes a second link assembly spaced apart from the first link assembly. The second link assembly includes a third link, a fourth link, and a second lifting link. The third link and the fourth link are hinged. The first link and the third link are connected by a rotating shaft. The fourth link is connected to the front frame. Two ends of the second lifting link are respectively hinged to the rotating shaft and the seat frame.

[0012] By adopting the above technical solution, when the first lifting link and the second lifting link which are spaced apart drive the seat frame to move, it is more stable, reducing the skew situation during the adjustment of the seat frame and enhancing the comfort of the user. When the first link assembly and the second link assembly which are spaced apart drive the front frame to move, it is smoother, reducing the occurrence of jamming and skew situations.

[0013] In combination with the first aspect, a further solution is that two ends of the first lifting link are respectively hinged to the rotating shaft and the left side frame, and two ends of the second lifting link are respectively hinged to the rotating shaft and the right side frame; the second link is connected to an end of the front frame close to the left side frame, and the fourth link is connected to an end of the front frame close to the right side frame.

[0014] By adopting the above technical solution, the first lifting link drives the left side frame to move, and the second lifting link drives the right side frame to move. The distance between them is large, directly driving the seat frame, and the driving is more stable. The second link and the fourth link are connected to both ends of the front frame, and it is more stable during the process of driving the front frame to move. The height difference of the arching at different positions of the seat spring is smaller, and the softness and hardness are more uniform.

[0015] In combination with the first aspect, a further solution is that the second link is connected with a first sliding shaft, the fourth link is connected with a second sliding shaft, the left side frame is provided with a first sliding groove, and the right side frame is provided with a second sliding groove. When the first driving member works, the first sliding shaft slides in the first sliding groove, and the second sliding shaft slides in the second sliding groove; the balance gravity adjustment mechanism further includes a second driving member. The second driving member includes a fixed end and a pushing end. The fixed end is connected to the right side frame, and the pushing end is connected to the third link to drive the third link to rotate.

[0016] By adopting the above technical solution, after the hardness and angle of the seat are adjusted in place by the first driving member, the third link can be driven to rotate by the second driving member to adjust the position of the front frame, and the height of the arching of the seat spring is adjusted by adjusting the position of the front frame, thereby adjusting the softness and hardness of the seat spring. Thus, after the seat is adjusted in place, the softness and hardness of the seat can be finely adjusted according to the personal preferences of different user groups to meet the usage requirements of different user groups.

[0017] In combination with the first aspect, a further solution further includes a third driving member, a backrest frame, and a linkage rod. The third driving member is connected between the fixed frame and the seat frame, and the linkage rod connects the seat frame and the backrest frame. When the third driving member drives the seat frame to rotate relative to the first lifting link, the backrest frame rotates synchronously under the drive of the linkage rod.

[0018] By adopting the above technical solution, the movement of the seat frame and the rotation of the backrest frame can be synchronously driven, and the angle adjustment of the backrest frame can be realized while adjusting the position of the seat frame, and the adjustment is simpler and more reasonable.

[0019] In combination with the first aspect, a further solution further includes a control device, and the control device controls the first driving member and the third driving member to work so that the included angle between the backrest frame and the seat frame is between 121° and 135°.

[0020] By adopting the above technical solution, the control device controls the first driving member to drive the seat frame to move and at the same time controls the third driving member to drive the seat frame to drive the backrest frame to rotate, so that the included angle between the backrest frame and the seat frame is within the range of 121° to 135°. This angle range keeps the muscles of the human body in a natural state, without additional stress on the muscles and bones, and the human body will feel relaxed and comfortable.

[0021] In the second aspect, the present application provides a seat, including any one of the balance gravity adjustment mechanisms described above.

[0022] By adopting the above technical solution, the seat can be adjusted in terms of softness and hardness according to the needs of different users, and at the same time, the sitting and lying angles can be adjusted, which is more applicable to a wider range of people and has a better experience.

[0023] In the third aspect, the present application provides a balance gravity adjustment method, including the balance gravity adjustment mechanism described in the first aspect, and further including a second driving member, a third driving member, a backrest frame, a linkage rod, and a second link assembly. The second driving member includes a fixed end and a pushing end. The fixed end is connected to the seat frame, and the pushing end is connected to the third link; the third driving member is connected between the fixed frame and the seat frame, and the linkage rod connects the seat frame and the backrest frame; the second link assembly includes a third link, a fourth link, and a second lifting link. The third link and the fourth link are hinged, the first link is connected to the third link through a rotating shaft, the fourth link is connected to the front frame, and both ends of the second lifting link are respectively hinged to the rotating shaft and the seat frame;

[0024] The balance gravity adjustment method includes the following adjustment steps:

[0025] First driving working step: The first driving member works. The first driving member drives the seat frame to rotate relative to the fixed frame through the transmission member and the first lifting link, and at the same time drives the front frame to move relative to the left side frame through the first link and the second link.

[0026] Second driving working step: The second driving member works. The second driving member drives the front frame to move relative to the right side frame through the third link and the fourth link.

[0027] Third driving working step: The third driving member works. The third driving member drives the seat frame to move, and at the same time the seat frame drives the backrest frame to rotate relative to the seat frame through the linkage rod.

[0028] By adopting the above technical solutions, the first driving working step adjusts the angle and hardness of the seat frame, the second driving working step adjusts the hardness of the seat frame, and the third driving working step adjusts the angle of the backrest frame, so as to complete the adjustment of the sitting and lying angles and hardness of the seat to meet the comfort requirements of users.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. The balance gravity adjustment mechanism of the present application realizes the synchronous adjustment of the angle and hardness of the seat through one driving member, without the need for complicated debugging actions by the user, the operation is simpler, and the user experience is better.

[0031] 2. The balance gravity adjustment mechanism of the present application has a simple and compact structure, reduces space occupation, and the driving structure is more reliable.

[0032] 3. The balance gravity adjustment mechanism of the present application can fine-tune the softness and hardness of the seat according to the personal preferences of different user groups after the seat adjustment is in place, so as to meet the usage requirements of different user groups.

[0033] 4. The seat of the present application can be adjusted for the softness and hardness according to the needs of different users, and at the same time can adjust the sitting and lying angles, with a wider range of applicable people and better experience.

[0034] 5. The balance gravity adjustment method of the present application can coordinate three driving working steps to adjust the sitting and lying angles and hardness of the seat, meeting the comfort requirements of users. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of the first embodiment of the balance gravity adjustment mechanism of the present application;

[0036] Figure 2 is a schematic side structure diagram of the seat spring of the first embodiment of the balance gravity adjustment mechanism of the present application;

[0037] Figure 3 It is a schematic structural diagram of the first embodiment of the balance gravity adjustment mechanism of the present application with the seat spring removed;

[0038] Figure 4 is Figure 3 an enlarged schematic diagram of part A in

[0039] Figure 5 It is a left view of the first embodiment of the balance gravity adjustment mechanism of the present application;

[0040] Figure 6 It is a schematic structural diagram of the second embodiment of the balance gravity adjustment mechanism of the present application;

[0041] Figure 7 is Figure 6 an enlarged schematic diagram of part B in

[0042] Figure 8 It is a right view of the second embodiment of the balance gravity adjustment mechanism of the present application;

[0043] Figure 9 It is a schematic diagram of the state of the balance gravity adjustment mechanism of the present application before adjustment;

[0044] Figure 10 It is a schematic diagram of the state of the balance gravity adjustment mechanism of the present application after adjustment;

[0045] Figure 11 A schematic structural diagram of the third embodiment of the balance gravity adjustment mechanism of the present application;

[0046] Figure 12 is Figure 11 an enlarged view of part C in

[0047] Reference numerals:

[0048] 1, fixed frame; 2, seat spring; 3, seat frame; 31, left side frame; 311, first chute; 32, front frame; 33, right side frame; 331, second chute; 4, connecting rod assembly; 41, first connecting rod assembly; 411, first lifting connecting rod; 412, first connecting rod; 413, second connecting rod; 414, first sliding shaft; 42, second connecting rod assembly; 421, second lifting connecting rod; 422, third connecting rod; 423, fourth connecting rod; 424, connecting rod; 425, second shaft; 426, coupling shaft; 427, second sliding shaft; 5, driving member; 51, first driving member; 511, rotating shaft; 512, first shaft; 513, transmission member; 5131, tooth-shaped structure; 514, gear; 52, third driving member; 53, second driving member; 531, fixed end; 532, pushing end; 6, linkage rod; 7, back frame; 8, rear frame; 81, rear connecting rod. Detailed implementation manners

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0051] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0052] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0053] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the features in the following embodiments can be combined with each other.

[0054] Embodiment 1:

[0055] Please refer to Figure 1 , a schematic structural diagram of a balance gravity adjustment mechanism. The balance gravity adjustment mechanism includes a fixed frame 1, a seat frame 3, a connecting rod assembly 4, a driving member 5, a linkage rod 6, and a back frame 7. A seat spring 2 is fixed on the seat frame for supporting the weight of a person. The seat spring 2 is connected to the front frame 32 and moves with the movement of the front frame 32. The seat spring 2 is an upwardly arched arc structure, and during the movement with the front frame 32, the curvature of the seat spring 2 changes. The linkage rod 6 connects the back frame 7 and the seat frame 3.

[0056] Please refer to Figure 2, a schematic diagram of the side structure of the seat spring 2, the seat spring 2 is an upwardly arched arc. When the seat frame 3 moves forward with the front frame 32, the height of the arch of the seat spring 2 decreases, the radius of curvature of the seat spring 2 increases, that is, the curvature becomes smaller, the deformation of the seat spring 2 when subjected to force is small, and the seat spring 2 becomes harder. On the contrary, when the seat frame 3 moves backward with the front frame 32, the radius of curvature of the seat spring 2 becomes smaller, that is, the curvature becomes larger, and the seat spring 2 becomes softer.

[0057] See also Figure 3 The seat frame 3 includes a left frame 31, a right frame 33 and a front frame 32, and the front frame 32 is slidably connected between the left frame 31 and the right frame 33. The other end of the left frame 31 and the right frame 33 away from the front frame 32 is connected to the rear frame 8, and a rear connecting rod 81 is hinged between the rear frame 8 and the fixed frame 1. A third driving member 52 is also installed between the rear frame 8 and the fixed frame 1, and the third driving member 52 is an electric push rod. When the third driving member 52 pushes the rear frame 8 to drive the seat frame 3 to move, the seat frame 3 pulls the back frame 7 to rotate through the connecting rod 6 to adjust the position of the seat frame 3 and the inclination angle of the back frame 7. There are many previous applications for the linkage structure of the back frame 7 and the seat frame 3, and there is also relevant disclosure in the patent application number 2022110110981. It is a well-known structure and will not be repeated in this application.

[0058] See also Figure 4 The first driving member 51 is fixedly mounted on the fixed frame 1 below the left side frame 31. The output end of the first driving member 51 is connected to a gear 514, which meshes with the toothed structure 5131 on the transmission member 513 to transmit power. The end of the transmission member 513 away from the toothed structure 5131 is pivoted to the rotating shaft 511, and a first shaft 512 is provided between the toothed structure 5131 and the rotating shaft 511. When the first driving member 51 is working, the transmission member 513 rotates around the first shaft 512. The first connecting rod assembly 41 is also connected to the rotating shaft 511. The first connecting rod assembly 41 includes a first lifting connecting rod 411 and a first connecting rod 412 and a second connecting rod 413 that are hinged to each other. The two ends of the first lifting connecting rod 411 are respectively hinged to the rotating shaft 511 and the left side frame 31. The first connecting rod 412 is fixedly connected to the rotating shaft 511, and the end of the second connecting rod 413 away from the first connecting rod 412 is connected to the end of the front frame 32 close to the left side frame 31. The first connecting rod 412 is L-shaped.

[0059] See also Figure 5 A first sliding groove 311 is provided on the left side frame 31 , and the second connecting rod 413 is connected to a first sliding shaft 414 , and the first sliding shaft 414 is slidably connected in the first sliding groove 311 .

[0060] The working process and principle of this embodiment are as follows:

[0061] Combination Figures 1 - 5 And refer to Figure 3 The location direction.

[0062] When the third driving member 52 pushes the rear frame 8 to drive the seat frame 3 to move forward, the seat frame 3 rotates upward around the first lifting link 411, the position of the seat frame 3 is lifted, the seat frame 3 pulls the backrest 7 to rotate counterclockwise through the linkage rod 6, the backrest 7 tilts backward, and the angle between the backrest 7 and the seat frame 3 becomes larger. At this time, it is in a lying position. When the angle range between the backrest and the thigh is between 121° and 135°, the muscles of the human body remain in a natural state, without additional stress on the muscles and bones, and the human body will feel comfortable. Therefore, in order to achieve the adjustment of balancing gravity, it is necessary to adjust the angle between the backrest and the seat to become smaller. Drive the first driving member 51 to work. The first driving member 51 rotates to drive the transmission member 513 to rotate counterclockwise, the rotating shaft 511 rotates upward and pushes the first link assembly 41 to rotate. When the rotating shaft 511 rotates upward, the first link 412 pushes the second link 413 to slide forward relative to the left side frame 31 and the right side frame 33, and the first lifting link 411 pushes the left side frame 31 to move upward and backward. Since the third driving member 52 restricts the front-back movement of the seat frame 3 through the rear frame 8, the left side frame 31 rotates upward and drives the right side frame 33 to rotate upward together through the front frame 32. The front end of the seat frame 3 is lifted, realizing the angle adjustment of the seat frame 3, and the angle between the seat frame 3 and the backrest becomes smaller, so that the front section of the entire seat cushion is lifted by 10° - 15°. In this way, the angle between the backrest and the seat cushion is about 128°, which is the best angle.

[0063] When the third driving member 52 pushes the rear frame 8 to drive the seat frame 3 to move backward, the seat frame 3 rotates downward around the first lifting link 411, the position of the seat frame 3 is lowered, the seat frame 3 pushes the backrest 7 to rotate clockwise through the linkage rod 6, the backrest 7 tilts forward, and the angle between the backrest 7 and the seat frame 3 becomes smaller. At this time, it is in a sitting position. The angle range between the backrest and the thigh is between 121° and 135°, and the human body will feel comfortable. Therefore, it is necessary to adjust the angle between the backrest and the seat to become larger. Drive the first driving member 51 to work. The first driving member 51 rotates to drive the transmission member 513 to rotate clockwise, the rotating shaft 511 rotates downward and pulls the first link assembly 41 to rotate. When the rotating shaft 511 rotates downward, the first link 412 pulls the second link 413 to slide backward relative to the left side frame 31, and the first lifting link 411 pulls the left side frame 31 to move downward and forward. Since the third driving member 52 restricts the front-back movement of the seat frame 3 through the rear frame 8, the left side frame 31 rotates downward and drives the right side frame 33 to rotate downward together through the front frame 32. The front end of the seat frame 3 is lowered, realizing the angle adjustment of the seat frame 3, and the angle between the seat frame 3 and the backrest becomes larger.

[0064] Embodiment 2:

[0065] Please refer to Figures 6 - 8 , which is different from Embodiment 1 in that the right side frame 33 is connected with a second driving member 53. The fixed end 531 of the second driving member 53 is fixedly connected with the right side frame 33, and the pushing end 532 is connected with the second link assembly 42.

[0066] Please refer to Figure 7 , the second link assembly 42 includes a second lifting link 421 and a third link 422 and a fourth link 423 that are hinged to each other. The third link 422 is L-shaped. The third link 422 is connected to the first link 412 through a rotating shaft 511. The third link 422 is pivotally connected to the rotating shaft 511. The fourth link 423 is fixedly connected or rotatably connected to the end of the front frame 32 near the right frame 33. The two ends of the second lifting link 421 are respectively hinged to the rotating shaft 511 and the right frame 33. In this embodiment, the second driving member 53 is an electric push rod, and other driving members 5 such as a hydraulic push rod can also be used. The first link 412 and the third link 422 are connected by a coupling shaft 426. The first link 412 and the second link 413 are pivotally connected to the coupling shaft 426, and the third link 422 and the fourth link 423 are also pivotally connected to the coupling shaft 426, so that the linkage of the first link assembly 41 and the second link assembly 42 can be realized.

[0067] Please refer to Figure 8 , the second link assembly 42 further includes a connecting rod 424. The two ends of the connecting rod 424 are respectively hinged to the rotating shaft 511 and the second shaft 425 on the fixed frame 1. A second sliding groove 331 is further provided on the right frame 33. The fourth link 423 is connected with a second sliding shaft 427. The second sliding shaft 427 is slidably connected in the second sliding groove 331.

[0068] Another difference between this embodiment and the first embodiment is that the first link 412 can be fixedly connected to the rotating shaft 511 and rotate through the rotating shaft 511, or can be pivotally connected to the rotating shaft 511. The rotation angle position of the L-shaped third link 422 is limited by the pushing end 532 of the second driving member 53, and further the rotation angle position of the first link 412 is limited by the coupling shaft 426. Because the pushing end 532 of the second driving member 53 limits the rotation of the first link 412 and the third link 422, the first link 412 and the third link 422 will not rotate when the first driving member 51 drives the front frame 32 to slide, which can effectively reduce the skew of the front frame 32 during the forward and backward sliding process.

[0069] The working process and principle of this embodiment are as follows:

[0070] Refer to Figure 5In the shown position and direction, when the pushing end 532 of the second driving member 53 pushes the third connecting rod 422 to rotate counterclockwise, the third connecting rod 422 drives the first connecting rod 412 to rotate synchronously through the coupling shaft 426. The fourth connecting rod 423 rotates clockwise relative to the third connecting rod 422, and the fourth connecting rod 423 drives the front frame 32 and the seat spring 2 connected to the front frame 32 to slide backward relative to the right side frame 33. At this time, the curvature of the seat spring 2 becomes larger and the seat spring 2 becomes softer. When the pushing end 532 of the second driving member 53 pulls the third connecting rod 422 to rotate clockwise, the third connecting rod 422 drives the first connecting rod 412 to rotate synchronously through the coupling shaft 426. The fourth connecting rod 423 rotates counterclockwise relative to the third connecting rod 422, and the fourth connecting rod 423 drives the front frame 32 and the seat spring 2 connected to the front frame 32 to slide forward relative to the right side frame 33. At this time, the curvature of the seat spring 2 becomes smaller and the seat spring 2 becomes harder. Through the above adjustment, after the angle between the seat frame 3 and the backrest frame 7 is adjusted in place, the softness and hardness of the seat spring 2 can be adjusted to meet the personalized needs of different users.

[0071] Please refer to Figure 9 , a schematic diagram of the state before the adjustment of the balance gravity adjustment mechanism of the present application. In this state, the seat frame 3 is approximately parallel to the fixed frame 1.

[0072] Please refer to Figure 10 , a schematic diagram of the state after the adjustment of the balance gravity adjustment mechanism of the present application. In this state, the front frame 32 end of the seat frame 3 rotates upward relative to the fixed frame 1 by an angle. Another adjustment state is that the seat frame 3 rotates downward relative to the fixed frame 1 by an angle. The principle is the same, and the present application will not illustrate with drawings.

[0073] In the above embodiment, the second connecting rod 413 is connected with a first sliding shaft 414, the fourth connecting rod 423 is connected with a second sliding shaft 427, the left side frame 31 is provided with a first sliding groove 311, and the right side frame 33 is provided with a second sliding groove 331. When the first driving member 51 works, the first sliding shaft 414 slides in the first sliding groove 311, and the second sliding shaft 427 slides in the second sliding groove 331.

[0074] Embodiment Three:

[0075] Please refer to Figure 11 and Figure 12 , the difference between this embodiment and Embodiment One is that the first driving member 51 is arranged at the rear end of the left side frame 31 far from the front frame 32. The first driving member 51 drives the left side frame 31 to rise and fall by driving the transmission member 513 to rotate, so as to adjust the inclination angle of the seat frame 3.

[0076] When people work sitting on a sofa, the spine bends forward, the force on the intervertebral disc increases, and in the long run, it will affect spinal health. This embodiment can be implemented in combination with the first embodiment to achieve the overall lifting of the seat frame 3 and the adjustment of the inclination angle of the seat frame 3, increase the angle between the spine and the thigh, make the spine (lumbar spine) present a natural curvature state, reduce the forward curvature of the spine, and improve the situation of posterior protrusion of the intervertebral disc.

[0077] Embodiment Four:

[0078] The difference from Embodiment Two is that the first connecting rod 412 is rotatably connected to the rotating shaft 511, the second driving member 53 includes a fixed end 531 and a pushing end 532, the fixed end 531 is fixedly connected to the left side frame 31, and the pushing end 532 is hinged to the first connecting rod 412. The first connecting rod 412 is L-shaped, the pushing end 532 is hinged to the end of the first connecting rod 412 far from the second connecting rod 413, and the rotating shaft 511 is connected to the first connecting rod 412 between the two hinge shafts of the first connecting rod 412. The second driving member 53 is an electric push rod.

[0079] The difference in principle from Embodiment Two is that the pushing end 532 of the second driving member 53 realizes the sliding of the front frame 32 by pushing the rotation of the first connecting rod 412, thereby realizing the change in the curvature of the seat spring 2 to adjust the softness and hardness of the seat spring 2.

[0080] Embodiment Five:

[0081] This embodiment discloses a seat, including the balance gravity adjustment mechanism in Embodiment One or Embodiment Two and a sofa cushion disposed on the balance gravity adjustment mechanism. The backrest frame 7 is connected with a backrest, and the backrest can rotate integrally with the backrest frame 7. A support chair frame can also be provided as needed, and the balance gravity adjustment mechanism is connected to the chair frame to support the weight of the person sitting. This embodiment further includes a control device for controlling the start and stop of the first driving member 51, the second driving member 53, and the third driving member 52, so as to adjust the angle between the backrest and the seat frame 3 and the softness and hardness of the seat frame 3.

[0082] Embodiment Six:

[0083] Please refer to Figures 1 - 12 , this application discloses a balance gravity adjustment method, applicable to the seat in Embodiment Four, including the following adjustment steps:

[0084] First driving working step:

[0085] In the first working state, the first driving member 51 operates. The rotation of the first driving member 51 drives the transmission member 513 to rotate counterclockwise. The rotating shaft 511 rotates upward and pushes the first link assembly 41 to rotate. When the rotating shaft 511 rotates upward, the first link 412 pushes the second link 413 to slide forward relative to the left frame 31 and the right frame 33. The first lifting link 411 pushes the left frame 31 to move upward and backward. Since the third driving member 52 restricts the front-back movement of the seat frame 3 through the rear frame 8, the left frame 31 rotates upward and drives the right frame 33 to rotate upward together through the front frame 32. The front end of the seat frame 3 is lifted, so that the front section of the entire seat cushion is lifted by 10° - 15°, realizing the angle adjustment of the seat frame 3, and the included angle between the seat frame 3 and the backrest becomes smaller.

[0086] In the second working state, the first driving member 51 is driven to operate. The rotation of the first driving member 51 drives the transmission member 513 to rotate clockwise. The rotating shaft 511 rotates downward and pulls the first link assembly 41 to rotate. When the rotating shaft 511 rotates downward, the first link 412 pulls the second link 413 to slide backward relative to the left frame 31. The first lifting link 411 pulls the left frame 31 to move downward and forward. Since the third driving member 52 restricts the front-back movement of the seat frame 3 through the rear frame 8, the left frame 31 rotates downward and drives the right frame 33 to rotate downward together through the front frame 32. The front end of the seat frame 3 is lowered, realizing the angle adjustment of the seat frame 3, and the included angle between the seat frame 3 and the backrest becomes larger.

[0087] Second driving working steps:

[0088] In the first working state, the second driving member 53 operates. The pushing end 532 of the second driving member 53 pushes the third link 422 to rotate counterclockwise. The third link 422 drives the first link 412 to rotate synchronously through the coupling shaft 426. The fourth link 423 rotates clockwise relative to the third link 422. The fourth link 423 drives the front frame 32 and the seat spring 2 connected to the front frame 32 to slide backward relative to the right frame 33. At this time, the curvature of the seat spring 2 becomes larger and the seat spring 2 becomes softer.

[0089] In the second working state, the second driving member 53 operates. The pushing end 532 of the second driving member 53 pulls the third link 422 to rotate clockwise. The third link 422 drives the first link 412 to rotate synchronously through the coupling shaft 426. The fourth link 423 rotates counterclockwise relative to the third link 422. The fourth link 423 drives the front frame 32 and the seat spring 2 connected to the front frame 32 to slide forward relative to the right frame 33. At this time, the curvature of the seat spring 2 becomes smaller and the seat spring 2 becomes harder.

[0090] Third driving working steps:

[0091] In the first working state, when the third driving member 52 operates and the third driving member 52 pushes the rear frame 8 to drive the seat frame 3 to move forward, the seat frame 3 rotates upward around the first lifting link 411, the position of the seat frame 3 is lifted, the seat frame 3 pulls the backrest frame 7 to rotate counterclockwise through the linkage rod 6, the backrest frame 7 tilts backward, and the angle between the backrest frame 7 and the seat frame 3 becomes larger. At this time, it is in the lying position state, and the angle range between the backrest and the thigh is between 121° and 135°.

[0092] In the second working state, when the third driving member 52 operates and the third driving member 52 pushes the rear frame 8 to drive the seat frame 3 to move backward, the seat frame 3 rotates downward around the first lifting link 411, the position of the seat frame 3 is lowered, the seat frame 3 pushes the backrest frame 7 to rotate clockwise through the linkage rod 6, the backrest frame 7 tilts forward, and the angle between the backrest frame 7 and the seat frame 3 becomes smaller. At this time, it is in the sitting position state. The angle range between the backrest and the thigh is between 121° and 135°.

[0093] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes, modifications, substitutions and variations, and all of these changes, modifications, substitutions and variations fall within the scope of the present invention claimed.

Claims

1. A gravity balance adjusting mechanism, comprising a fixed frame (1), characterized in that, It further includes: A seat frame (3), including a frame-shaped structure composed of a left frame (31), a right frame (33) and a front frame (32), wherein the front frame (32) is slidably connected between the left frame (31) and the right frame (33); An adjusting assembly, including a first driving member (51), a transmission member (513) and a rotating shaft (511), wherein the first driving member (51) is connected to the fixed frame (1), one end of the transmission member (513) is connected to the first driving member (51) to transmit power, and the other end of the transmission member (513) is connected to the rotating shaft (511); A first link assembly (41), including a first lifting link (411) and a first link (412) and a second link (413) that are hinged to each other, wherein both ends of the first lifting link (411) are respectively hinged to the rotating shaft (511) and the seat frame (3), the first link (412) is connected to the rotating shaft (511), and the end of the second link (413) away from the first link (412) is connected to the front frame (32); Wherein, when the adjusting assembly drives the left frame (31) and the right frame (33) to rotate relative to the first driving member (51) through the first link assembly (41), at the same time, the adjusting assembly drives the front frame (32) to move relative to the left frame (31) and the right frame (33) through the first link assembly (41); a seat spring (2) is fixed on the seat frame (3) for supporting the weight of a person, the seat spring (2) is connected to the front frame (32) and moves with the movement of the front frame (32), and the seat spring (2) is an upward-arching arc-shaped structure, and during the movement with the front frame (32), the arc of the seat spring (2) changes.

2. The balance gravity adjustment mechanism according to claim 1, characterized in that, It further includes a second driving member (53), the second driving member (53) includes a fixed end (531) and a pushing end (532), the fixed end (531) is connected to the seat frame (3), and the pushing end (532) is connected to the first link (412).

3. The balance gravity adjustment mechanism according to claim 2, characterized in that The first link (412) is L-shaped, the pushing end (532) is hinged to the end of the first link (412) away from the second link (413), and the rotating shaft (511) is connected to the first link (412) between the two hinge shafts of the first link (412).

4. The balance gravity adjustment mechanism according to claim 1, wherein It further includes a second link assembly (42) arranged at an interval from the first link assembly (41), the second link assembly (42) includes a third link (422), a fourth link (423) and a second lifting link (421), the third link (422) and the fourth link (423) are hinged, the first link (412) is connected to the third link (422) through the rotating shaft (511), the fourth link (423) is connected to the front frame (32), and both ends of the second lifting link (421) are respectively hinged to the rotating shaft (511) and the seat frame (3).

5. The balance gravity adjustment mechanism according to claim 4, wherein, Both ends of the first lifting link (411) are respectively hinged to the rotating shaft (511) and the left frame (31), and both ends of the second lifting link (421) are respectively hinged to the rotating shaft (511) and the right frame (33); the second link (413) is connected to the end of the front frame (32) close to the left frame (31), and the fourth link (423) is connected to the end of the front frame (32) close to the right frame (33).

6. The balance gravity adjustment mechanism according to claim 5, characterized in that, The second link (413) is connected with a first sliding shaft (414), the fourth link (423) is connected with a second sliding shaft (427), the left frame (31) is provided with a first sliding groove (311), and the right frame (33) is provided with a second sliding groove (331). When the first driving member (51) works, the first sliding shaft (414) slides in the first sliding groove (311), and the second sliding shaft (427) slides in the second sliding groove (331); the balance gravity adjusting mechanism further includes a second driving member (53), the second driving member (53) includes a fixed end (531) and a pushing end (532), the fixed end (531) is connected to the right frame (33), and the pushing end (532) is connected to the third link (422) to drive the third link (422) to rotate.

7. The balance gravity adjustment mechanism according to claim 1, wherein It further includes a third driving member (52), a back frame (7) and a linkage rod (6). The third driving member (52) is connected between the fixed frame (1) and the seat frame (3), and the linkage rod (6) connects the seat frame (3) and the back frame (7). When the third driving member (52) drives the seat frame (3) to rotate relative to the first lifting link (411), the back frame (7) rotates synchronously under the drive of the linkage rod (6).

8. The balance gravity adjustment mechanism according to claim 7, characterized in that, It further includes a control device, and the control device controls the first driving member (51) and the third driving member (52) to work so that the included angle between the back frame (7) and the seat frame (3) is between 121° and 135°.

9. A seating furniture, characterized in that, It includes the balance gravity adjusting mechanism according to any one of claims 1-8.

10. A gravity balance adjustment method, characterized in that, Comprising the balance gravity adjustment mechanism as described in claim 4, it further includes a second driving member (53), a third driving member (52), a backrest (7), a linkage rod (6) and a second linkage assembly (42). The second driving member (53) includes a fixed end (531) and a pushing end (532). The fixed end (531) is connected to the seat frame (3), and the pushing end (532) is connected to the third linkage (422). The third driving member (52) is connected between the fixed frame (1) and the seat frame (3). The linkage rod (6) connects the seat frame (3) and the backrest (7). The second linkage assembly (42) includes a third linkage (422), a fourth linkage (423) and a second lifting linkage (421). The third linkage (422) and the fourth linkage (423) are hinged. The first linkage (412) is connected to the third linkage (422) through a rotating shaft (511). The fourth linkage (423) is connected to the front frame (32). Both ends of the second lifting linkage (421) are respectively hinged to the rotating shaft (511) and the seat frame (3). The balance gravity adjustment method includes the following adjustment steps: First driving operation step: The first driving member (51) operates. The first driving member (51) drives the seat frame (3) to rotate relative to the fixed frame (1) through the transmission member (513) and the first lifting linkage (411), and at the same time drives the front frame (32) to move relative to the left side frame (31) through the first linkage (412) and the second linkage (413). Second driving operation step: The second driving member (53) operates. The second driving member (53) drives the front frame (32) to move relative to the right side frame (33) through the third linkage (422) and the fourth linkage (423). Third driving operation step: The third driving member (52) operates. The third driving member (52) drives the seat frame (3) to move, and at the same time the seat frame (3) drives the backrest (7) to rotate relative to the seat frame (3) through the linkage rod (6).

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