Linkage mechanism and seat

Abstract

The application discloses a linkage mechanism and a seat, which comprises a seat frame, a leg support and a back frame, and further comprises a sliding frame connected with the seat frame in a sliding mode; a back connecting rod assembly connected with the back frame, the seat frame and the sliding frame, and used for realizing linkage between the back frame and the sliding frame to move relative to the seat frame; a leg connecting rod mechanism connected with the sliding frame and the leg support, and used for realizing the leg support to move close to or away from the sliding frame; a linkage assembly rotatably connected with the sliding frame and hinged at two ends of the linkage assembly with the seat frame and the leg connecting rod mechanism respectively; and a driving assembly connected with the sliding frame and used for driving the leg support and the back frame to move relative to the seat frame; wherein when the driving assembly works, the sliding frame slides relative to the seat frame, and the leg support and the back frame move and rotate relative to the seat frame. The linkage mechanism and the seat can realize synchronous rotation of the leg support and the back frame through one driving source.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of home furnishing, in particular to a linkage mechanism and a seat. BACKGROUND

[0002] With the development of the home furnishing industry, people have more and more functional requirements for seats. At present, sofas with function adjustment cannot realize synchronous opening and closing movement of the sofa backrest and leg rest through a single driving source, and can only drive one of the seat cushion backrest and leg rest first, and then drive the other one, which cannot be opened and closed synchronously. If the sofa backrest and leg rest are to be opened and closed synchronously, each of the backrest and leg rest needs to have a driving source, and the synchronous opening and closing of the backrest and leg rest are realized through the control of the two driving source switches. Thus, one driving source is added, increasing the cost of the sofa. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a linkage mechanism and a seat, which can drive the leg rest and the backrest frame to synchronously open and close movement through one driving source, has a simple structure, and reduces the cost of the product.

[0004] In a first aspect, the present application provides a linkage mechanism, comprising a seat frame, a leg rest and a backrest frame, further comprising:

[0005] a sliding frame, which is in sliding connection with the seat frame;

[0006] a back connecting rod assembly, which is connected with the backrest frame, the seat frame and the sliding frame, and is used to realize linkage of the backrest frame and the sliding frame to move relative to the seat frame;

[0007] a leg connecting rod mechanism, which is connected with the sliding frame and the leg rest, and is used to realize movement of the leg rest relative to the sliding frame to approach or move away;

[0008] a linkage assembly, which is in rotational connection with the sliding frame and is hinged at two ends of the linkage assembly to the seat frame and the leg connecting rod mechanism, respectively;

[0009] a driving assembly, which is connected with the sliding frame and is used to drive the leg rest and the backrest frame to move relative to the seat frame;

[0010] When the driving assembly works, the sliding frame slides relative to the seat frame, and the leg rest and the backrest frame move and rotate relative to the seat frame.

[0011] By adopting the above technical solution, the sliding frame and the linkage assembly are connected with the leg connecting rod mechanism and the back connecting rod assembly, the leg connecting rod mechanism is connected with the leg rest, and the back connecting rod assembly is connected with the backrest frame. Thus, the leg rest and the backrest frame can be driven to synchronously open and close movement through one driving source, the posture adjustment is smooth, and the traditional sofa adjustment is changed to smooth body feeling.

[0012] With reference to the first aspect, in a further implementation form of the first aspect or the implementation forms thereof, the drive assembly is connected between the slide frame and the seat frame, and is configured to drive the slide frame to move relative to the seat frame, and the slide frame, in the moving process, drives the leg support and the back frame to move and rotate relative to the seat frame through the leg linkage mechanism, the linkage assembly and the back linkage assembly.

[0013] By adopting the above technical solution, the drive assembly is arranged between the slide frame and the seat frame, and the drive assembly drives the slide frame to move relative to the seat frame, and the slide frame, in the moving process, drives the leg support and the back frame to move and rotate relative to the seat frame through the leg linkage mechanism, the linkage assembly and the back linkage assembly.

[0014] With reference to the first aspect, in a further implementation form of the first aspect or the implementation forms thereof, the drive assembly is connected between the slide frame and the seat frame, and is configured to drive the slide frame to move relative to the seat frame, and the slide frame, in the moving process, drives the leg support and the back frame to move and rotate relative to the seat frame through the leg linkage mechanism, the linkage assembly and the back linkage assembly.

[0015] By adopting the above technical solution, the drive assembly is arranged between the slide frame and the seat frame, and the drive assembly drives the slide frame to move relative to the seat frame, and the slide frame, in the moving process, drives the leg support and the back frame to move and rotate relative to the seat frame through the leg linkage mechanism, the linkage assembly and the back linkage assembly.

[0016] With reference to the first aspect, in a further implementation form of the first aspect or the implementation forms thereof, the back linkage assembly comprises a first back linkage, a second back linkage and a third back linkage, two ends of the first back linkage are respectively hinged to the back frame and the seat frame, two ends of the second back linkage are also respectively hinged to the back frame and the seat frame, and two ends of the third back linkage are respectively hinged to the second back linkage and the slide frame, wherein the first back linkage, the back frame, the second back linkage and the seat frame are hinged to each other to form a planar four-bar linkage mechanism.

[0017] By adopting the above technical solution, the second back linkage is linked to the slide frame through the third back linkage, and the first back linkage, the back frame, the second back linkage and the seat frame are hinged to each other to form a double rocker mechanism of the planar four-bar linkage mechanism, so that the back frame can move and rotate synchronously with the slide frame.

[0018] With reference to the first aspect, in a further implementation form of the first aspect or the implementation forms thereof, the linkage assembly comprises a first linkage rod, a second linkage rod and a third linkage rod, the second linkage rod is hinged to the slide frame, two ends of the second linkage rod are respectively hinged to the first linkage rod and the third linkage rod, one end of the first linkage rod away from the second linkage rod is hinged to the back linkage assembly, and one end of the third linkage rod away from the second linkage rod is hinged to the leg linkage mechanism.

[0019] By adopting the technical scheme, the second linkage rod is hinged to the slide, so that the second linkage rod can move together with the slide and rotate relative to the slide, the second linkage rod drives the back linkage assembly to move through the first linkage rod and drives the leg linkage mechanism to move through the third linkage rod, so that the leg support and the back frame can move synchronously.

[0020] With reference to the first aspect, in a further implementation form of the first aspect or the implementation forms thereof, the leg linkage mechanism comprises a leg rod assembly, a bracket and a connecting rod, the leg rod assembly is hinged at two ends to the slide and the bracket respectively, the leg support is hinged to the leg rod assembly, and the connecting rod is hinged at two ends to the bracket and the leg support respectively.

[0021] By adopting the technical scheme, the leg rod assembly can drive the leg support to move synchronously, the bracket and the connecting rod can drive the leg support to rotate relative to the leg rod assembly while moving together with the leg rod assembly, so that the leg support can move close to or away from the slide and rotate relative to the slide at the same time, and the leg of the occupant can be better supported.

[0022] With reference to the first aspect, in a further implementation form of the first aspect or the implementation forms thereof, the leg rod assembly comprises a first leg rod, a second leg rod, a third leg rod and a fourth leg rod, one end of the first leg rod is hinged to the slide, the other end is hinged to the second leg rod, and one end of the second leg rod away from the first leg rod is hinged to one end of the leg support; one end of the third leg rod is hinged to the slide, the other end is hinged to the fourth leg rod, one end of the fourth leg rod away from the third leg rod is hinged to the bracket, and the middle part of the fourth leg rod is hinged to the middle part of the first leg rod.

[0023] By adopting the technical scheme, the connection structure of the first leg rod, the second leg rod, the third leg rod and the fourth leg rod can realize that the leg support moves close to or away from the slide and the leg support also rotates relative to the slide at the same time, so that the leg support can be stretched away from the slide or close to the slide and be accommodated under the slide.

[0024] With reference to the first aspect, in a further implementation form of the first aspect or the implementation forms thereof, the bracket is further hinged to the second leg rod, and the hinge point is close to the hinge point between the leg support and the second leg rod, the connecting rod is hinged to the leg rod, and the hinge point is close to the hinge point between the leg support and the second leg rod, and the bracket, the connecting rod, the leg support and the second leg rod are hinged to each other to form a planar four-bar linkage mechanism.

[0025] By adopting the technical scheme, the bracket is hinged with the second leg rod and the fourth leg rod respectively, so that the bracket can rotate relative to the leg rod assembly while moving with the leg rod assembly, thereby assisting the leg support to support the legs of the occupant. The hinging point of the bracket and the second leg rod is close to the hinging point of the leg support and the second leg rod, the hinging point of the connecting rod and the leg rod is close to the hinging point of the leg support and the second leg rod, and the bracket, the connecting rod, the leg support and the second leg rod are hinged with each other to form a planar four-bar linkage mechanism, so that the supporting surfaces of the leg support and the bracket are substantially in a plane in a fully extended state of the leg rod assembly, so as to support the legs of the occupant in a plane and improve the comfort experience of leg support.

[0026] With reference to the first aspect, in a further implementation form of the first aspect, the driving assembly comprises a driving member and a driving rod, the driving member comprises a fixed end and a driving end, one of the fixed end and the driving end is connected with the sliding frame, and the other is eccentrically hinged with the driving rod, and the driving rod is fixedly connected with the leg linkage mechanism.

[0027] By adopting the technical scheme, the driving end of the driving member can be telescopically moved relative to the fixed end to drive the leg linkage mechanism to move. The driving member drives the driving rod to rotate through eccentric driving, and the driving rod drives the leg linkage mechanism to move, thereby realizing the synchronous opening and closing movement of the leg support and the back frame.

[0028] In a second aspect, the application provides a seat comprising the linkage mechanism as described in the first aspect.

[0029] By adopting the technical scheme, the synchronous movement and rotation of the leg support and the back frame are realized through one driving source, the structure is simple, the cost is low, and the occupied space and weight of the entire seat can be reduced.

[0030] In summary, the application has at least one of the following beneficial technical effects:

[0031] 1. The linkage mechanism of the application changes the traditional structure of realizing the synchronous opening and closing of the leg support and the back frame through multiple driving sources, realizes the synchronous opening and closing movement of the leg support and the back frame through one driving source, and has a simple product structure, small occupied space and relatively light weight.

[0032] 2. The seat of the application realizes the synchronous movement and rotation of the leg support and the back frame through one driving source, has a simpler driving program and structure, is lower in cost, and can reduce the occupied space and weight of the entire seat. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic view of a sitting posture state of a first embodiment of the linkage mechanism of the application;

[0034] Figure 2 is a structural schematic view of a lying posture state of the first embodiment of the linkage mechanism of the application;

[0035] Figure 3 is the structure schematic view of the intermediate state of the linkage mechanism of the first embodiment of the application;

[0036] Figure 4 is the structure schematic view of the sitting state of the linkage mechanism of the second embodiment of the application;

[0037] Figure 5 is the structure schematic view of the lying state of the linkage mechanism of the second embodiment of the application;

[0038] Figure 6 is the structure schematic view of the intermediate state of the linkage mechanism of the second embodiment of the application;

[0039] Figure 7 is the structure schematic view of the sitting state of the linkage mechanism of the third embodiment of the application;

[0040] Figure 8 is the structure schematic view of the lying state of the linkage mechanism of the third embodiment of the application;

[0041] Figure 9 is the structure schematic view of the intermediate state of the linkage mechanism of the third embodiment of the application;

[0042] Figure 10 is the structure schematic view of the sitting state of the linkage mechanism of the fourth embodiment of the application;

[0043] Figure 11 is the structure schematic view of the lying state of the linkage mechanism of the fourth embodiment of the application.

[0044] Reference signs:

[0045] 1, seat frame; 2, back linkage assembly; 21, first back linkage; 22, second back linkage; 23, third back linkage; 3, leg linkage mechanism; 31, first leg linkage; 32, second leg linkage; 33, third leg linkage; 34, fourth leg linkage; 35, bracket; 36, connecting rod; 4, slide frame; 5, driving member; 51, fixed end; 52, driving end; 53, driving rod; 6, linkage assembly; 61, first linkage rod; 62, second linkage rod; 63, third linkage rod; 7, back frame; 8, leg support. DETAILED DESCRIPTION

[0046] To make the purpose, technical scheme and advantages of the embodiments of the application more clear, the application will be further described in detail below with reference to the drawings. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0047] It should be noted that similar reference numerals and letters refer to like items in the various figures, and that, once an item is defined in one figure, it should not require further defining and explaining in subsequent figures.

[0048] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0051] The linkage mechanism of the conventional seat furniture includes two driving members, which respectively drive the back linkage assembly and the leg linkage mechanism to realize the movement of the back linkage assembly and the leg linkage mechanism. The conventional seat furniture is generally a sofa or a recliner. When adjusting different use postures, two driving mechanisms and systems are required for control, which is complex in structure, high in cost and tedious in adjustment.

[0052] Embodiment one

[0053] Please refer to Figures 1-3 , a structural diagram of an embodiment of the linkage mechanism.

[0054] The linkage mechanism has two use states of sitting and lying, please refer to Figure 1, the structure diagram of the sitting state of the linkage mechanism. The linkage mechanism comprises a seat frame 1, a leg support 8, a back frame 7, a sliding frame 4, a back linkage assembly 2, a leg linkage mechanism 3, a linkage assembly 6 and a driving assembly. The sliding frame 4 is slidably connected with the seat frame 1. The back linkage assembly 2 is connected with the back frame 7, the seat frame 1 and the sliding frame 4, and is used for realizing linkage of the back frame 7 and the sliding frame 4 to move relative to the seat frame 1. The leg linkage mechanism 3 is connected with the sliding frame 4 and the leg support 8, and is used for realizing movement of the leg support 8 relative to the sliding frame 4 to approach or move away from. The linkage assembly 6 is rotatably connected with the sliding frame 4, and two ends of the linkage assembly 6 are respectively hinged with the seat frame 1 and the leg linkage mechanism 3. The driving assembly is connected with the sliding frame 4 and is used for driving the leg support 8 and the back frame 7 to move relative to the seat frame 1. When the driving assembly works, the sliding frame 4 slides relative to the seat frame 1, and the leg support 8 and the back frame 7 move and rotate relative to the seat frame 1.

[0055] The driving assembly comprises a driving member 5 connected between the sliding frame 4 and the seat frame 1, and the driving member 5 is used for driving the sliding frame 4 to move relative to the seat frame 1. During the movement of the sliding frame 4, the leg support 8 and the back frame 7 are driven by the leg linkage mechanism 3, the linkage assembly 6 and the back linkage assembly 2 to move and rotate relative to the seat frame 1. According to different product functional requirements, the driving member 5 can be a linear motor, an electric push rod or other pneumatic or hydraulic driving mechanisms.

[0056] In the sitting state, the leg linkage mechanism 3 is retracted below the seat frame 1 and the sliding frame 4, and the back linkage assembly 2 is folded to be approximately perpendicular to the seat frame 1.

[0057] Please refer to Figure 2 and Figure 3 The back linkage assembly 2 comprises a first back linkage 21, a second back linkage 22 and a third back linkage 23. Two ends of the first back linkage 21 are respectively hinged with the back frame 7 and the seat frame 1, and two ends of the second back linkage 22 are also respectively hinged with the back frame 7 and the seat frame 1. Two ends of the third back linkage 23 are respectively hinged with the second back linkage 22 and the sliding frame 4. The first back linkage 21, the back frame 7, the second back linkage 22 and the seat frame 1 are hinged with each other to form a planar four-link mechanism, and the hinged point of the third back linkage 23 and the second back linkage 22 is located in the middle of the second back linkage 22 and is close to the hinged position of the second back linkage 22 and the back frame 7.

[0058] The linkage assembly 6 comprises a first linkage rod 61, a second linkage rod 62 and a third linkage rod 63. The middle part of the second linkage rod 62 is hinged with the sliding frame 4, and two ends of the second linkage rod 62 are respectively hinged with the first linkage rod 61 and the third linkage rod 63. One end of the first linkage rod 61 away from the second linkage rod 62 is hinged with the seat frame 1, and one end of the third linkage rod 63 away from the second linkage rod 62 is hinged with the third leg rod 33 of the leg linkage mechanism 3 and the hinged point is close to the hinged position of the third leg rod 33 and the sliding frame 4.

[0059] The leg connecting rod mechanism 3 comprises a leg rod assembly, a bracket 35 and a connecting rod 36. The leg rod assembly comprises a first leg rod 31, a second leg rod 32, a third leg rod 33 and a fourth leg rod 34. One end of the first leg rod 31 is hingedly connected to the sliding frame 4, and the other end is hingedly connected to the second leg rod 32. One end of the second leg rod 32 away from the first leg rod 31 is hingedly connected to one end of the leg bracket 8. One end of the third leg rod 33 is hingedly connected to the sliding frame 4, and the other end is hingedly connected to the fourth leg rod 34. One end of the fourth leg rod 34 away from the third leg rod 33 is hingedly connected to the bracket 35, and the middle of the fourth leg rod 34 is hingedly connected to the middle of the first leg rod 31. The bracket 35 is also hingedly connected to the second leg rod 32, and the hinge point is close to the hinge point of the leg bracket 8 and the second leg rod 32. The connecting rod 36 is hingedly connected to the leg rod hinge point, which is close to the hinge point of the leg bracket 8 and the second leg rod 32. The bracket 35, the connecting rod 36, the leg bracket 8 and the second leg rod 32 are hingedly connected to each other to form a planar four-bar linkage mechanism.

[0060] During the transition from the sitting position to the lying position, the driving member 5 drives the sliding frame 4 to move relative to the seat frame 1. The sliding frame 4 drives the second linkage rod 62 to move, and the first linkage rod 61 pulls the second linkage rod 62 to rotate during the movement of the second linkage rod 62. The second linkage rod 62 drives the third linkage rod 63 to move, and the third linkage rod 63 drives the leg connecting rod mechanism 3 to rotate outward from the seat frame 1 to the upward direction. When the leg connecting rod mechanism 3 moves, the third leg rod 33 and the second leg rod 32 drive the bracket 35 to rotate, and the leg bracket 8 rotates relative to the second leg rod 32 under the combined action of the second leg rod 32, the bracket 35 and the linkage rod.

[0061] Please refer to Figure 2 , the structure of the linkage mechanism in the lying position is shown. In the lying position, the leg connecting rod mechanism 3 rotates forward and upward away from the sliding frame 4, and the leg bracket 8 rotates upward relative to the second leg rod 32 to approximately form a plane with the bracket 35. The back connecting rod assembly 2 rotates relative to the seat frame 1 under the drive of the sliding frame 4, and the back bracket 7 rotates from the approximately vertical state to the state of being inclined at an angle with the seat frame 1. The driving assembly comprises a driving member 5. In this embodiment, the driving member 5 is an electric push rod. According to design needs, the electric member can be a linear motor, a pneumatic driving member 5 or a hydraulic driving member 5. The driving member 5 comprises a fixed end 51 and a driving end 52. The fixed end 51 is provided with a driving motor which can drive the driving end 52 to move linearly relative to the fixed end 51. In this embodiment, the fixed end 51 is connected to the seat frame 1, and the driving end 52 is pivotally connected to the sliding frame 4. According to the structure needs, the fixed end 51 can be fixedly connected to the seat frame 1 or hingedly connected to the seat frame 1. In this embodiment, the fixed end 51 is pivotally connected.

[0062] Please refer to Figure 3There is also an intermediate state between the sitting state and the lying state. In this state, the leg linkage mechanism 3 rotates upward and forward relative to the seat frame 1 but is not fully stretched out, the leg support 8 does not rotate relative to the second leg link 32 and the leg support 8 is in a folded state relative to the second leg link 32. The back linkage assembly 2 rotates by an angle relative to the seat frame 1, and the back frame 7 also rotates by an angle relative to the seat frame 1 under the drive of the back linkage assembly 2. The first linkage rod 61, the second linkage rod 62 and the third linkage rod 63 of the linkage assembly 6 are hingedly connected to each other to form a small Z shape.

[0063] Embodiment Two

[0064] Please refer to Figures 4-6 The structure of the second embodiment of the linkage mechanism of the present application is shown in the figure. The difference between the second embodiment and the first embodiment is that the first linkage rod 61 is a long linkage rod.

[0065] Please refer to Figure 4 The structure of the sitting state of the linkage mechanism of the present application is shown in the figure. In the sitting state, the leg linkage mechanism 3 is retracted below the seat frame 1 and the slide frame 4, and the back linkage assembly 2 is in a folded state approximately perpendicular to the seat frame 1.

[0066] Please refer to Figure 5 The structure of the lying state of the linkage mechanism of the present application is shown in the figure. In the lying state, the leg linkage mechanism 3 rotates forward and upward relative to the slide frame 4 and moves away from the slide frame 4, and the leg support 8 rotates upward relative to the second leg link 32 and is approximately in a plane with the bracket 35. The back linkage assembly 2 rotates relative to the seat frame 1 under the drive of the slide frame 4, and the back frame 7 rotates from a state approximately perpendicular to the seat frame 1 to a state inclined at an angle to the seat frame 1.

[0067] Please refer to Figure 6 There is also an intermediate state between the sitting state and the lying state. In this state, the leg linkage mechanism 3 rotates upward and forward relative to the seat frame 1 but is not fully stretched out, the leg support 8 does not rotate relative to the second leg link 32 and the leg support 8 is in a folded state relative to the second leg link 32. The back linkage assembly 2 rotates by an angle relative to the seat frame 1, and the back frame 7 also rotates by an angle relative to the seat frame 1 under the drive of the back linkage assembly 2. The first linkage rod 61, the second linkage rod 62 and the third linkage rod 63 of the linkage assembly 6 are hingedly connected to each other to form a small Z shape.

[0068] Please refer to Figure 5 and Figure 6The same as example one, the leg linkage mechanism 3 also includes a first leg link 31, a second leg link 32, a third leg link 33, a fourth leg link 34, a bracket 35, a connecting rod 36, and the structure and connection of the leg linkage mechanism 3, the leg bracket 8 and the slide 4 are also the same as example one. The linkage assembly 6 also includes a first linkage rod 61, a second linkage rod 62 and a third linkage rod 63, and the connection structure is also approximately the same. The back linkage assembly 2 also includes a first back linkage 21, a second back linkage 22 and a third back linkage 23, and the structure and connection of the back linkage assembly 2, the back bracket 7 and the seat 1 are also the same. The driving member 5 is also connected between the seat 1 and the slide 4.

[0069] Different from example one, the first linkage rod 61 adopts a long connecting rod structure, and the speed of the leg linkage mechanism 3 rotating from the front to the upper direction of the seat 1 will be different when the sitting posture is converted into the lying posture state. Different first linkage rod 61 structure schemes can be selected according to design needs.

[0070] Example three

[0071] Please refer to Figures 7-9 The difference between this embodiment and example one is that the driving member 5 is connected between the slide 4 and the leg linkage mechanism 3. The driving member 5 is connected with the leg linkage mechanism 3 through a driving rod 53, and in this embodiment, the driving rod 53 is fixedly connected with the first leg link 31, and the driving end 52 of the driving member 5 is eccentrically pivotally connected with the driving rod 53. The driving member 5 drives the linkage assembly 6 to move by driving the leg linkage mechanism 3 to move, and the linkage assembly 6 drives the slide 4 to move relative to the seat 1 to drive the back linkage assembly 2 to rotate, thereby realizing the synchronous opening and closing movement of the leg bracket 8 and the back bracket 7.

[0072] Figure 7 The structure diagram of the linkage mechanism in the sitting posture state of the present application, Figure 8 The structure diagram of the linkage mechanism in the lying posture state of the present application, Figure 9 The structure diagram of the linkage mechanism in the intermediate state of the present application, which is the same as example one and will not be repeated.

[0073] Example four

[0074] Please refer to Figure 10 and Figure 11 The difference between this embodiment and example two is that the driving member 5 is connected between the slide 4 and the leg linkage mechanism 3. The difference between this embodiment and example three is that the first linkage rod 61 in the linkage assembly 6 is a long connecting rod.

[0075] Figure 10 The structure diagram of the linkage mechanism in the sitting posture state of the present application, Figure 11 The structure diagram of the linkage mechanism in the lying posture state of the present application, the structure diagram of the linkage mechanism in the intermediate state, etc. are the same as example three and will not be repeated.

[0076] Example Five

[0077] This embodiment provides a seat, in particular a chair or sofa, with the linkage mechanism of any of the above embodiments.

[0078] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, the present application can have various changes, modifications, replacements and variations, and these changes, modifications, replacements and variations all fall within the scope of the claimed present application.

Claims

1. A linkage mechanism comprising a seat frame (1), a leg rest (8) and a back frame (7), characterized in that, Also comprising: a slide (4) connected with the seat frame (1) in sliding mode; a back linkage assembly (2) connected with the back frame (7), the seat frame (1) and the slide (4) for realizing linkage of the back frame (7) and the slide (4) to move relative to the seat frame (1); a leg linkage mechanism (3) connected with the slide (4) and the leg support (8) for realizing movement of the leg support (8) relative to the slide (4) to approach or move away; a linkage assembly (6) connected with the slide (4) in rotating mode and both ends of the linkage assembly (6) are hinged with the seat frame (1) and the leg linkage mechanism (3) respectively; a driving assembly connected with the slide (4) for driving the leg support (8) and the back frame (7) to move relative to the seat frame (1); wherein, when the driving assembly works, the slide (4) slides relative to the seat frame (1) and the leg support (8) and the back frame (7) move and rotate relative to the seat frame (1); the driving assembly is connected between the slide (4) and the leg linkage mechanism (3), the driving assembly is used for driving the leg linkage mechanism (3) to rotate relative to the slide (4), and in the rotating process of the leg linkage mechanism (3), the slide (4) is driven to move relative to the seat frame (1) through the linkage assembly (6) and the back linkage assembly (2), and the leg support (8) and the back frame (7) move and rotate relative to the seat frame (1).

2. The linkage mechanism of claim 1, wherein the driving assembly is connected between the slide (4) and the seat frame (1), the driving assembly is used for driving the slide (4) to move relative to the seat frame (1), and in the moving process of the slide (4), the leg support (8) and the back frame (7) are driven to move and rotate relative to the seat frame (1) through the leg linkage mechanism (3), the linkage assembly (6) and the back linkage assembly (2).

3. The linkage of claim 1, wherein, the back linkage assembly (2) comprises a first back linkage (21), a second back linkage (22) and a third back linkage (23), both ends of the first back linkage (21) are hinged with the back frame (7) and the seat frame (1) respectively, both ends of the second back linkage (22) are also hinged with the back frame (7) and the seat frame (1) respectively, and both ends of the third back linkage (23) are hinged with the second back linkage (22) and the slide (4) respectively, wherein the first back linkage (21), the back frame (7), the second back linkage (22) and the seat frame (1) are hinged with each other to form a planar four-bar linkage mechanism.

4. The linkage of claim 1, wherein, the linkage assembly (6) comprises a first linkage rod (61), a second linkage rod (62) and a third linkage rod (63), the second linkage rod (62) is hinged with the slide (4), both ends of the second linkage rod (62) are hinged with the first linkage rod (61) and the third linkage rod (63) respectively, one end of the first linkage rod (61) away from the second linkage rod (62) is hinged with the seat frame (1), and one end of the third linkage rod (63) away from the second linkage rod (62) is hinged with the leg linkage mechanism (3).

5. The linkage of claim 1, wherein, The leg linkage mechanism (3) comprises a leg rod assembly, a bracket (35) and a connecting rod (36), one end of the leg rod assembly is hingedly connected with the sliding frame (4) and the other end is hingedly connected with the bracket (35), the leg bracket (8) is hingedly connected with the leg rod assembly, and two ends of the connecting rod (36) are hingedly connected with the bracket (35) and the leg bracket (8) respectively.

6. The linkage mechanism of claim 5, wherein, The leg rod assembly comprises a first leg rod (31), a second leg rod (32), a third leg rod (33) and a fourth leg rod (34), one end of the first leg rod (31) is hingedly connected with the sliding frame (4) and the other end is hingedly connected with the second leg rod (32), one end of the second leg rod (32) away from the first leg rod (31) is hingedly connected with one end of the leg bracket (8); one end of the third leg rod (33) is hingedly connected with the sliding frame (4) and the other end is hingedly connected with the fourth leg rod (34), one end of the fourth leg rod (34) away from the third leg rod (33) is hingedly connected with the bracket (35), and the middle part of the fourth leg rod (34) is hingedly connected with the middle part of the first leg rod (31).

7. The linkage mechanism of claim 6, wherein, The bracket (35) is further hingedly connected with the second leg rod (32) and the hinged point is close to the hinged point of the leg bracket (8) and the second leg rod (32), the connecting rod (36) is hingedly connected with the leg rod and the hinged point is close to the hinged point of the leg bracket (8) and the second leg rod (32), and the bracket (35), the connecting rod (36), the leg bracket (8) and the second leg rod (32) are hingedly connected with each other to form a planar four-bar linkage mechanism.

8. The linkage of claim 1, wherein, The driving assembly comprises a driving member (5) and a driving rod (53), the driving member (5) comprises a fixed end (51) and a driving end (52), one of the fixed end (51) and the driving end (52) is connected with the sliding frame (4) and the other is eccentrically hingedly connected with the driving rod (53), and the driving rod (53) is fixedly connected with the leg linkage mechanism (3).

9. A seat characterized by, The linkage mechanism comprises the linkage mechanism according to any one of claims 1-8. The linkage mechanism comprises the linkage mechanism according to any one of claims 1-8.

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