Zero-gravity sofa frame structure

Abstract

The zero-gravity sofa frame structure comprises a base, a seat frame arranged on the base in a sliding mode, a leg frame connected to the seat frame, a linkage assembly connected to the base and used for achieving linkage of the seat frame and the leg frame, and a driving part used for driving the seat frame to move relative to the base and / or driving the leg frame to move relative to the seat frame. The movement process of the seat frame comprises a first stage and a second stage, and in the first stage, the driving force borne by the leg frame and used for driving the leg frame to move relative to the seat frame is smaller than the driving force borne by the leg frame and used for driving the leg frame to move relative to the seat frame in the second stage; and in the first stage, the driving force borne by the seat frame and used for driving the seat frame to move relative to the base is larger than the driving force borne by the seat frame and used for driving the seat frame to move relative to the base in the second stage. According to the scheme, power output of the driving part is reasonably configured in the whole movement process, and the problem that the load of the driving part is too large in the later movement period is solved.

Description

Technical Field

[0001] The present application relates to the technical field of sofas, and in particular to a zero-gravity sofa frame structure. Background Art

[0002] The zero-gravity sofa is a type of sofa. When a person lies on the sofa, the knees and heart are at the same level, the angle between the upper body and the thighs is about 128 degrees, and the angle between the thighs and the calves is about 133 degrees, thus making all parts of the body in the most relaxed state and reducing muscle fatigue.

[0003] Referring to existing patent application documents with application numbers 202322358339.6 or 202010750528.6, the zero-gravity sofa mainly includes a seat frame, a backrest assembly connected to the rear side of the seat frame, a leg frame (leg assembly) connected to the front side of the seat frame, and a driving member connected to the seat frame for driving the backrest assembly and the leg assembly to move. When the sofa is transformed into a zero-gravity lying position, the seat frame moves forward and its front end tilts up, the backrest assembly can be flipped backward and downward relative to the seat frame, and the leg assembly can be flipped forward and upward relative to the seat frame to unfold. The unfolding process is that the footrest in the leg assembly used to support the user's calf moves away from the seat frame.

[0004] Among them, a leg connecting rod for rotationally connecting to the seat frame is provided in the leg assembly, and the driving member applies force to the leg connecting rod, thereby driving the leg assembly to expand or fold; in the early stage of the sofa being transformed into a zero-gravity lying position, the angle between the thrust direction applied by the driving member to the leg connecting rod and the instantaneous rotation direction of the leg connecting rod is small, and the driving member can push the leg assembly to expand with less effort; in the late stage of the sofa being transformed into a zero-gravity lying position, the angle between the thrust direction applied by the driving member to the leg connecting rod and the instantaneous rotation direction of the leg connecting rod is large, and the driving member can push the leg assembly to expand with more effort.

[0005] In the later stage of the sofa's transformation into a zero-gravity lying position, the driver also needs to output a large force to overcome the gravity of the seat frame to drive the front end of the seat frame to tilt upward. This results in a large load on the driver in the later stage of the movement, which places high demands on the driver and increases the company's production costs. Utility Model Content

[0006] In order to reasonably configure the power output of the driving parts during the entire movement process and improve the problem of excessive load on the driving parts in the later stage of the movement, the present application provides a zero-gravity sofa frame structure.

[0007] On the one hand, the present application provides a zero-gravity sofa frame structure, which adopts the following technical solutions:

[0008] A zero-gravity sofa frame structure comprises a base, a seat frame slidably disposed on the base, a leg frame connected to the seat frame, a linkage assembly connected to the base and used to realize linkage between the seat frame and the leg frame, and a driving member used to drive the seat frame to move relative to the base and / or drive the leg frame to move relative to the seat frame;

[0009] The movement process of the seat frame includes a first stage and a second stage. In the first stage, the driving force received by the leg frame for driving the leg frame to move relative to the seat frame is smaller than the driving force received by the leg frame for driving the leg frame to move relative to the seat frame in the second stage; in the first stage, the driving force received by the seat frame for driving the seat frame to move relative to the base is larger than the driving force received by the seat frame for driving the seat frame to move relative to the base in the second stage.

[0010] By adopting the above technical scheme, taking the process of converting to a zero-gravity state as an example, in the early stage when the leg frame needs less power, that is, the first stage, more power is supplied by the driving member to move the seat frame forward and the front end of the seat frame is tilted upward compared to the rear end; and in the later stage when the leg frame needs more power, that is, the first stage, less power is supplied by the driving member to move the seat frame forward and the front end of the seat frame is tilted upward compared to the rear end; thereby, the power output of the driving member is reasonably configured in the entire movement process, and the problem of excessive load on the driving member in the later stage of the movement is improved.

[0011] Optionally: a track is provided on the base, and a moving part is provided on the seat frame, the moving part is connected to the track and can move along the track; the slope of the line connecting the head and tail ends of the moving part moving along the track in the first stage is greater than the slope of the line connecting the head and tail ends of the moving part moving along the track in the second stage.

[0012] Optionally: the track includes a first track and a second track, the moving parts are provided with two groups, and the two groups of moving parts are respectively connected to the first track and the second track; the front side of the zero-gravity sofa structure is defined as the front, the first track is located in front of the second track, and the first track includes a first part and a second part located in front of and above the first part;

[0013] In the first stage, the moving part on the first track is located in the first part, and in the second stage, the moving part on the first track is located in the second part.

[0014] Optionally: the first track is arranged in an arc shape.

[0015] Optionally: the track includes a first track and a second track, the moving parts are provided with two groups, and the two groups of moving parts are respectively connected to the first track and the second track; the front side of the zero-gravity sofa structure is defined as the front, the first track is located behind the second track, and the first track includes a first part and a second part located in front of and below the first part;

[0016] In the first stage, the moving part on the first track is located in the first part, and in the second stage, the moving part on the first track is located in the second part.

[0017] Optionally: the first track is arranged in an arc shape.

[0018] Optionally: the leg frame includes at least one main connecting member, which is rotatably connected to the seat frame, and a vertical plane containing the rotation point of the main connecting member relative to the seat frame is defined as a first reference plane; in the first stage, the rotation angle of the main connecting member relative to the first reference plane is smaller than the rotation angle of the main connecting member relative to the first reference plane in the second stage.

[0019] Optionally: the leg frame includes at least one main connecting member, and the main connecting member is rotatably connected to the seat frame;

[0020] The driving member is connected to the main connecting member, the force applied to the main connecting member by the driving member is F1, the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the driving member and the direction of F1 is a, and the angle a in the first stage is greater than the angle a in the second stage; or the linkage assembly includes a third connecting member, the third connecting member is connected to the main connecting member, the force applied to the main connecting member by the third connecting member is F2, the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the third connecting member and the direction of F2 is b, and the angle b in the first stage is greater than the angle b in the second stage.

[0021] Optionally: the leg frame includes at least one main connecting member, the main connecting member is rotatably connected to the seat frame, and a vertical plane including a rotation point of the main connecting member relative to the seat frame is defined as a first reference plane; in the first stage, a rotation angle of the main connecting member relative to the first reference plane is smaller than a rotation angle of the main connecting member relative to the first reference plane in the second stage;

[0022] The driving member is connected to the main connecting member, the force applied to the main connecting member by the driving member is F1, the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the driving member and the direction of F1 is a, and the angle a in the first stage is greater than the angle a in the second stage; or the linkage assembly includes a third connecting member, the third connecting member is connected to the main connecting member, the force applied to the main connecting member by the third connecting member is F2, the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the third connecting member and the direction of F2 is b, and the angle b in the first stage is greater than the angle b in the second stage.

[0023] Optional: the linkage assembly includes a first connecting member, a second connecting member and a third connecting member, the second connecting member is rotatably connected to the seat frame; the first connecting member is provided with two connecting points, the two connecting points of the first connecting member are respectively rotatably connected to the base and the second connecting member; the third connecting member is provided with two connecting points, the two connecting points of the third connecting member are respectively rotatably connected to the main connecting member and the second connecting member; the rotation point of the second connecting member relative to the seat frame is located between the connection point of the first connecting member and the second connecting member and the connection point of the third connecting member and the second connecting member.

[0024] Optionally: the linkage assembly also includes a first connecting member and a second connecting member, the second connecting member is rotatably connected to the seat frame; the first connecting member is provided with two connecting points, and the two connecting points of the first connecting member are respectively rotatably connected to the base and the second connecting member; the third connecting member is provided with two connecting points, and the two connecting points of the third connecting member are respectively rotatably connected to the main connecting member and the second connecting member; the rotation point of the second connecting member relative to the seat frame is located between the connection point of the first connecting member and the second connecting member and the connection point of the third connecting member and the second connecting member.

[0025] Optionally: the linkage assembly also includes a first connecting member and a second connecting member, the second connecting member is rotatably connected to the seat frame; the first connecting member is provided with two connecting points, and the two connecting points of the first connecting member are respectively rotatably connected to the base and the second connecting member; the third connecting member is provided with two connecting points, and the two connecting points of the third connecting member are respectively rotatably connected to the main connecting member and the second connecting member; the rotation point of the second connecting member relative to the seat frame is located between the connection point of the first connecting member and the second connecting member and the connection point of the third connecting member and the second connecting member.

[0026] Optional: the leg frame includes at least one main connecting member, which is rotatably connected to the seat frame; the linkage assembly includes a first connecting member, a second connecting member and a third connecting member, and the second connecting member is rotatably connected to the seat frame; the first connecting member is provided with two connecting points, and the two connecting points of the first connecting member are respectively rotatably connected to the base and the second connecting member; the third connecting member is provided with two connecting points, and the two connecting points of the third connecting member are respectively rotatably connected to the main connecting member and the second connecting member; the rotation point of the second connecting member relative to the seat frame is located between the connection point of the first connecting member and the second connecting member and the connection point of the third connecting member and the second connecting member.

[0027] Optionally: the drive member has two connection points,

[0028] The two connection points of the driving member are respectively rotatably connected to the seat frame and the second connection member; or the two connection points of the driving member are respectively rotatably connected to the seat frame and the main connection member; or the two connection points of the driving member are respectively rotatably connected to the seat frame and the base.

[0029] Optionally, the leg frame includes at least one main connecting member, which is rotatably connected to the seat frame; the driving member has two connecting points.

[0030] The two connection points of the driving member are rotatably connected to the seat frame and the main connection member respectively; or the two connection points of the driving member are rotatably connected to the seat frame and the base respectively.

[0031] On the other hand, the present application provides a zero-gravity sofa frame structure, which adopts the following technical solution:

[0032] A zero-gravity sofa frame structure comprises a base, a seat frame slidably disposed on the base, a leg frame connected to the seat frame, a linkage assembly connected to the base and used to realize linkage between the seat frame and the leg frame, and a driving member used to drive the seat frame to move relative to the base and / or drive the leg frame to move relative to the seat frame;

[0033] The base is provided with a track, and the seat frame is provided with a moving part, which is connected to the track and can move along the track; the track includes a first part and a second part, and the slope of the line connecting the head and tail ends of the moving part moving along the track in the first part is greater than the slope of the line connecting the head and tail ends of the moving part moving along the track in the second part.

[0034] Optionally: the track includes a first track and a second track, the moving parts are provided with two groups, and the two groups of moving parts are respectively connected to the first track and the second track; the front side of the zero-gravity sofa structure is defined as the front, and the first track is located in front of the second track; the first part and the second part are included in the first track, and the second part is located in front of and above the first part.

[0035] Optionally: the track includes a first track and a second track, the moving parts are provided with two groups, and the two groups of moving parts are respectively connected to the first track and the second track; the front side of the zero-gravity sofa structure is defined as the front, and the first track is located behind the second track; the first part and the second part are included in the first track, and the second part is located in front of and below the first part.

[0036] In summary, the present application includes at least one of the following beneficial technical effects:

[0037] 1. This solution reasonably configures the power output of the driving parts during the entire movement process to improve the problem of excessive load on the driving parts in the later stage of the movement; mainly by adjusting the curvature or slope of the track, the upward speed of the front end of the seat frame relative to the rear end in the forward direction can be different in the first stage and the second stage, mainly in the first stage, the upward speed is faster, so that the seat frame exerts more force in the first stage, so as to save the force required by the seat frame in the second stage.

[0038] 2. Among them, there are mainly two specific forms of expression of the track curvature or slope. First of all, no matter which one, the track includes a first track and a second track. The first form of expression is that the track at the front position extends forward and upward, and the further it extends forward, the smaller its slope is; the second form of expression is that the track at the rear position extends forward and downward, and the further it extends forward, the smaller its slope is.

[0039] 3. There are multiple options for the installation position of the driving member of the present scheme. For example, the driving member is installed between the base and the seat frame, and is used to directly push the seat frame to move relative to the base, and indirectly drive the leg frame to move through the linkage assembly. For another example, the driving member is installed between the seat frame and the main connecting member of the leg frame, and is used to directly drive the leg frame to move, and indirectly drive the seat frame to move relative to the base through the linkage assembly. For another example, the driving member is installed between the seat frame and the second connecting rod of the linkage assembly, and is used to drive the linkage assembly to move, thereby indirectly driving the leg frame to move, and indirectly driving the seat frame to move relative to the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of Example 1 of the present application;

[0041] Figure 2 for Figure 1 A magnified view of part A;

[0042] Figure 3 This is a structural diagram of the leg frame of Example 1 of the present application;

[0043] Figure 4 This is a force diagram of the leg frame of Example 1 of the present application;

[0044] Figure 5 This is a schematic diagram for showing the position of the first track in Example 2 of the present application;

[0045] Figure 6 This is a schematic diagram for showing the installation position of the driving member in Example 3 of the present application;

[0046] Figure 7 This is a force diagram of the leg frame of Example 3 of the present application;

[0047] Figure 8 This is a schematic diagram for showing the installation position of the driving member in Example 4 of the present application;

[0048] Fig. 9 This is a schematic diagram of Example 5 of the present application for showing the installation position of the driving component.

[0049] In the figure, 1, base; 11, first track; 111, first part; 112, second part; 12, second track; 2, seat frame; 21, moving member; 4, leg frame; 41, first leg connecting rod; 42, second leg connecting rod; 43, third leg connecting rod; 44, leg bracket; 45, fifth leg connecting rod; 46, fourth leg connecting rod; 47, sixth leg connecting rod; 48, foot bracket; 49, second driving rod; 491, second extension rod; 5, driving member; 51, first power member; 52, second power member; 6, linkage assembly; 61, first connecting member; 62, second connecting member; 63, third connecting member; 64, first driving rod; 65, first extension rod; 7, first reference surface. DETAILED DESCRIPTION

[0050] The present application is further described in detail below in conjunction with the accompanying drawings.

[0051] The present application discloses a zero-gravity sofa frame structure.

[0052] Embodiment 1, as Figure 1 As shown, it includes a base 1, a seat frame 2 slidably arranged on the base 1, a leg frame 4 connected to the seat frame 2, and a driving member 5 for driving the seat frame 2 to move relative to the base 1 and / or driving the leg frame 4 to move relative to the seat frame 2. The base 1 is horizontally arranged and is a frame structure. The seat frame 2 is arranged in a rectangular frame. The seat frame 2 is arranged above the base 1 and can move relative to the base 1 to change the state.

[0053] In this embodiment, at least two states are included, namely, the initial state and the zero-gravity state. The front side of the sofa is the front. In the zero-gravity state, the leg frame is flipped forward and unfolded, and the seat frame moves forward and its front end is upturned compared to the rear end. Finally, when the user lies on the sofa of this solution, the user's knee height can be roughly equal to the heart height, and the human body's blood circulation can be relatively smooth. Of course, in other embodiments, this solution is not limited to only two states, but can also be the more common three states of functional sofas: sitting position, TV position and lying position, and the lying position is the zero-gravity state, and it can also include four or more states.

[0054] The movement process of the seat frame 2 includes a first stage and a second stage. The driving force received by the leg frame 4 in the first stage is smaller than that received by the leg frame 4 in the second stage. The driving force received by the seat frame 2 in the first stage is larger than that received by the seat frame 2 in the second stage. Therefore, the present scheme can reasonably configure the power output of the driving component 5 in the entire movement process, thereby improving the problem of excessive load on the driving component 5 in the later stage of the movement.

[0055] The driving force on the seat frame 2 in the first stage is greater than the driving force on the seat frame 2 in the second stage.

[0056] A set of tracks is disposed on both the left and right side walls of the base 1, and each set of tracks includes a first track 11 and a second track 12. In this embodiment, the first track 11 is located in front of the first track 12, and the first track 11 extends forward and upward, and the slope decreases as it extends forward, and the first track 11 is in an arc shape as a whole; the first track 11 includes a first part 111 and a second part 112, and the slopes of the first part 111 at both ends are greater than the slopes of the second part 112 at both ends. The second track 12 is disposed horizontally.

[0057] A group of moving parts 21 are provided on both the left and right side walls of the seat frame 2, and each group of moving parts 21 has two moving parts, which are respectively connected to the first track 11 and the second track 12; under the cooperation between the moving parts 21 and the tracks, the seat frame 2 can move along a specific track. In this embodiment, the moving parts 21 can be selected as rollers rotatably connected to the seat frame 2, and in other embodiments, the moving parts 21 can also be selected as wear-resistant sliders fixed to the seat frame 2.

[0058] The slope of the line connecting the head and tail ends of the moving member 21 in the first track 11 in the first stage along the track is greater than the slope of the line connecting the head and tail ends in the second stage along the track. In the first stage, when the seat frame 2 moves forward for the same distance, the upward angle of its front end compared to the rear end is greater than the upward angle in the second stage, that is, it is faster in the first stage. In order to support the faster upward tilt of the seat frame 2, it is necessary to provide a greater force support for the seat frame 2 to overcome gravity and achieve upward tilt in the first stage compared to the second stage. This also achieves that the driving force applied to the seat frame 2 in the first stage is greater than the driving force applied to the seat frame 2 in the second stage.

[0059] In this embodiment, in the first stage, the moving range of the moving member 21 in the first track 11 is exactly equal to the first part 111, and in the second stage, the moving range of the moving member 21 in the first track 11 is exactly equal to the second part 112. In other embodiments, in the first stage, the moving range of the moving member 21 in the first track 11 is not equal to the first part 111, and in the second stage, the moving range of the moving member 21 in the first track 11 is not equal to the second part 112, that is, the two sections of the first track 11 corresponding to the first stage and the second stage may not be a fixed value, as long as it can be achieved that the driving force on the seat frame 2 in the first stage is greater than the driving force on the seat frame 2 in the second stage.

[0060] The specific force application method of the driving member 5 is described as follows:

[0061] A linkage component 6 is connected to the base 1, and the linkage component 6 is used to realize the linkage between the seat frame 2 and the leg frame 4. In this embodiment, the driving member 5 can be selected as an electric push rod, whose tail end is rotatably connected to the rear frame of the seat frame 2, and its front end, that is, the output end, is rotatably connected to the linkage component 6. When the driving member 5 moves, it can directly drive the linkage component 6 to move, and indirectly drive the leg frame 4 to move through the linkage component 6, and indirectly drive the seat frame 2 to move relative to the base 1.

[0062] The linkage assembly 6 includes a first connecting member 61, a second connecting member 62 and a third connecting member 63, the second connecting member 62 is rotatably connected to the seat frame 2; the first connecting member 61 is provided with two connecting points, and the two connecting points of the first connecting member 61 are rotatably connected to the base 1 and the second connecting member 62 respectively; the third connecting member 63 is provided with two connecting points, and the two connecting points of the third connecting member 63 are rotatably connected to the leg frame 4 and the second connecting member 62 respectively; the rotation point of the second connecting member 62 relative to the seat frame 2 is located between the connection point of the first connecting member 61 and the second connecting member 62 and the connection point of the third connecting member 63 and the second connecting member 62.

[0063] There are two groups of linkage components 6, which are respectively arranged on the left and right sides of the seat frame 2. A first driving rod 64 is arranged between the two groups of linkage components 6. The two ends of the first driving rod 64 are respectively fixed to the second connecting members 62 of the two groups of linkage components 6. A first extension rod 65 is fixed to the middle of the first driving rod 64. The output end of the driving member 5 is rotatably connected to the first extension rod 65, so that the first driving rod 64 and the second connecting member 62 can be driven to move.

[0064] When the output end of the driving member 5 is retracted, the second connecting member 62 can be driven to rotate clockwise (in Figure 1 As a reference), the second connecting member 62 will apply force to the first connecting member 61, but since the first connecting member 61 is connected to the base 1, the first connecting member 61 cannot be pushed backward, and a force is generated to push the second connecting member 62 back, so that the seat frame 2 connected to the second connecting member 62 moves forward relative to the base.

[0065] The driving force received by the leg frame 4 in the first stage is smaller than the driving force received by the leg frame 4 in the second stage.

[0066] like Figure 1 and 2 As shown, the leg frame 4 includes at least one main connecting member, which is rotatably connected to the seat frame 2. In this embodiment, there are two main connecting members, namely a first leg connecting rod 41 and a second leg connecting rod 42. The upper ends of the first leg connecting rod 41 and the second leg connecting rod 42 are both rotatably connected to the seat frame 2. The leg frame 4 also includes a third leg connecting rod 43, a fourth leg connecting rod 46, and a leg bracket 44. One end of the third leg connecting rod 43 is rotatably connected to the lower end of the first leg connecting rod 41, and the other end is rotatably connected to the leg bracket 44. One end of the fourth leg connecting rod 46 is rotatably connected to the lower end of the second leg connecting rod 42, and the other end is rotatably connected to the leg bracket 44. The swing of one of the main connecting members can drive the leg bracket 44 to move closer or farther away.

[0067] An extension section is provided at one end of the fourth leg link 46 away from the second leg link 42, and the rotation point of the fourth leg link 46 and the leg bracket 44 is located between the extension section and one end of the second leg link 42 close to the second leg link 42; the leg frame 4 also includes a fifth leg link 45 and a sixth leg link 47, one end of the sixth leg link 47 is rotatably connected to the end of the extension section, and the other end thereof is fixed with a foot bracket 48, one end of the fifth leg link 45 is rotatably connected to the fifth leg link 45, and the other end thereof is rotatably connected to the sixth leg link 47.

[0068] like Figure 2 , 3As shown, a vertical plane including the rotation point of the main connecting member relative to the seat frame 2 is defined as the first reference plane 7; the rotation angle a of the main connecting member relative to the first reference plane 7 in the first stage is smaller than the rotation angle a of the main connecting member relative to the first reference plane 7 in the second stage. Therefore, in the first stage, the force used to push the main connecting member to swing is relatively small, while in the second stage, a larger force is required.

[0069] like Figure 4 As shown, the driving member 5 transmits the force to the main connecting member through the third connecting member 63. The main connecting member is subjected to the force F2 of the driving member 5. The angle between the instantaneous rotation direction of the main connecting member relative to the force point of the driving member 5 and the direction of F2 is c. The angle c in the first stage is greater than the angle c in the second stage. Therefore, in the first stage, the force used to push the main connecting member to swing is relatively small, while in the second stage, a larger force is required.

[0070] Therefore, this also achieves that the driving force received by the leg frame 4 in the first stage is smaller than the driving force received by the leg frame 4 in the second stage.

[0071] Embodiment 2, as Figure 5 As shown, the difference from Example 1 is that the first track 11 is located behind the second track 12, the first track 11 is arranged in an arc shape, and its front end extends forward and downward, the first track 11 includes a first part 111 and a second part 112 located in front of the first part 111, and the slopes of the first part 111 at both ends are greater than the slopes of the second part 112 at both ends. The second track 12 is arranged horizontally.

[0072] The slope of the line connecting the head and tail ends of the moving part 21 in the first track 11 in the first stage of movement along the track is greater than the slope of the line connecting the head and tail ends in the second stage of movement along the track. In the first stage, when the seat frame 2 moves forward for the same distance, the upward angle of its front end compared to the rear end is greater than the upward angle in the second stage, that is, the rear end of the seat frame 2 tilts downward faster in the first stage. In order to support the seat frame 2 to tilt downward faster, it is necessary to provide greater force support for supporting the seat frame 2 to move downward in the first stage compared to the second stage. This also achieves that the driving force on the seat frame 2 in the first stage is greater than the driving force on the seat frame 2 in the second stage.

[0073] In this embodiment, in the first stage, the moving range of the moving member 21 in the first track 11 is exactly equal to the first part 111, and in the second stage, the moving range of the moving member 21 in the first track 11 is exactly equal to the second part 112. In other embodiments, in the first stage, the moving range of the moving member 21 in the first track 11 is not equal to the first part 111, and in the second stage, the moving range of the moving member 21 in the first track 11 is not equal to the second part 112, that is, the two sections of the first track 11 corresponding to the first stage and the second stage may not be a fixed value, as long as it can be achieved that the driving force on the seat frame 2 in the first stage is greater than the driving force on the seat frame 2 in the second stage.

[0074] Embodiment 3, as Figure 6 , 7 As shown, the difference from the embodiment 1 is that a second driving rod 49 is fixedly connected between the two corresponding main connecting members on the left and right sides. In this embodiment, the second driving rod 49 is connected between the two second leg connecting rods 42, and a second extension rod 491 is fixed to the middle of the second driving rod 49. The output end of the driving member 5 is not connected to the second connecting member 62, but is rotatably connected to the second extension rod 491.

[0075] The force exerted on the main connecting member by the driving member 5 is F1, and the angle between the instantaneous rotation direction of the main connecting member relative to the force receiving point of the driving member 5 and the direction of F1 is b, and the angle b in the first stage is greater than the angle b in the second stage. Therefore, in the first stage, the force used to push the main connecting member to swing is relatively small, while in the second stage, a larger force is required.

[0076] Embodiment 4, as Figure 8 As shown, the difference from Example 1 is that the output end of the driving member 5 is not connected to the second connecting member 62, but is rotationally connected to the rear frame of the seat frame 2; the tail end of the driving member 5 is not connected to the rear frame of the seat frame 2, but is rotationally connected to the rear frame of the base 1.

[0077] Embodiment 5, as Fig. 9 As shown, the difference from Example 3 is that the driving member 5 includes a first power member 51 and a second power member 52, the tail end of the first power member 51 is rotatably connected to the rear frame of the base 1, and the output end of the first power member 51 is rotatably connected to the rear frame of the seat frame 2. The tail end of the second power member 52 is rotatably connected to the rear frame of the seat frame 2, and the output end of the second power member 52 is rotatably connected to the second extension rod 491.

[0078] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A zero-gravity sofa frame structure, characterized in that: The invention comprises a base (1), a seat frame (2) slidably arranged on the base (1), a leg frame (4) connected to the seat frame (2), a linkage assembly (6) connected to the base (1) and used for realizing linkage between the seat frame (2) and the leg frame (4), and a driving member (5) used for driving the seat frame (2) to move relative to the base (1) and / or driving the leg frame (4) to move relative to the seat frame (2); The movement process of the seat frame (2) includes a first stage and a second stage. In the first stage, the driving force received by the leg frame (4) for driving the leg frame (4) to move relative to the seat frame (2) is smaller than the driving force received by the leg frame (4) for driving the leg frame (4) to move relative to the seat frame (2) in the second stage. In the first stage, the driving force received by the seat frame (2) for driving the seat frame (2) to move relative to the base (1) is larger than the driving force received by the seat frame (2) for driving the seat frame (2) to move relative to the base (1) in the second stage.

2. The zero-gravity sofa frame structure according to claim 1, characterized in that: The base (1) is provided with a track, and the seat frame (2) is provided with a moving member (21), the moving member (21) being connected to the track and being capable of moving along the track; the slope of a line connecting the head and tail ends of the moving member (21) moving along the track in a first stage is greater than the slope of a line connecting the head and tail ends of the moving member (21) moving along the track in a second stage.

3. The zero-gravity sofa frame structure according to claim 2, characterized in that: The track comprises a first track (11) and a second track (12); the moving member (21) is provided with two groups, and the two groups of the moving members (21) are respectively connected to the first track (11) and the second track (12); the front side of the zero-gravity sofa frame structure is defined as the front side, the first track (11) is located in front of the second track (12), and the first track (11) comprises a first part (111) and a second part (112) located in front of and above the first part (111); In the first stage, the moving part (21) on the first track (11) is located in the first part (111), and in the second stage, the moving part (21) on the first track (11) is located in the second part (112).

4. The zero-gravity sofa frame structure according to claim 3, characterized in that: The first track (11) is arranged in an arc shape.

5. The zero-gravity sofa frame structure according to claim 2, characterized in that: The track comprises a first track (11) and a second track (12); the moving member (21) is provided with two groups, and the two groups of the moving members (21) are respectively connected to the first track (11) and the second track (12); the front side of the zero-gravity sofa frame structure is defined as the front side, the first track (11) is located behind the second track (12), and the first track (11) comprises a first part (111) and a second part (112) located in front of and below the first part (111); In the first stage, the moving part (21) on the first track (11) is located in the first part (111), and in the second stage, the moving part (21) on the first track (11) is located in the second part (112).

6. The zero-gravity sofa frame structure according to claim 5, characterized in that: The first track (11) is arranged in an arc shape.

7. A zero-gravity sofa frame structure according to any one of claims 1 to 6, characterized in that: The leg frame (4) comprises at least one main connecting member, the main connecting member is rotatably connected to the seat frame (2), and a vertical plane including a rotation point of the main connecting member relative to the seat frame (2) is defined as a first reference plane (7); in the first stage, a rotation angle a of the main connecting member relative to the first reference plane (7) is smaller than a rotation angle a of the main connecting member relative to the first reference plane (7) in the second stage.

8. A zero-gravity sofa frame structure according to any one of claims 1 to 6, characterized in that: The leg frame (4) comprises at least one main connecting member, and the main connecting member is rotatably connected to the seat frame (2); The driving member (5) is connected to the main connecting member, the main connecting member is subjected to a force F1 by the driving member (5), the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the driving member (5) and the direction of F1 is b, and the angle b in the first stage is greater than the angle b in the second stage; or the linkage assembly (6) includes a third connecting member (63), the third connecting member (63) is connected to the main connecting member, the main connecting member is subjected to a force F2 by the third connecting member (63), the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the third connecting member (63) and the direction of F2 is c, and the angle c in the first stage is greater than the angle c in the second stage.

9. A zero-gravity sofa frame structure according to any one of claims 1 to 6, characterized in that: The leg frame (4) comprises at least one main connecting member, the main connecting member is rotatably connected to the seat frame (2), and a vertical plane including a rotation point of the main connecting member relative to the seat frame (2) is defined as a first reference plane (7); in the first stage, a rotation angle a of the main connecting member relative to the first reference plane (7) is smaller than a rotation angle a of the main connecting member relative to the first reference plane (7) in the second stage; The driving member (5) is connected to the main connecting member, the main connecting member is subjected to a force F1 by the driving member (5), the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the driving member (5) and the direction of F1 is b, and the angle b in the first stage is greater than the angle b in the second stage; or the linkage assembly (6) includes a third connecting member (63), the third connecting member (63) is connected to the main connecting member, the main connecting member is subjected to a force F2 by the third connecting member (63), the angle between the instantaneous rotation direction of the main connecting member relative to the force point of the third connecting member (63) and the direction of F2 is c, and the angle c in the first stage is greater than the angle c in the second stage.

10. The zero-gravity sofa frame structure according to claim 7, characterized in that: The linkage assembly (6) comprises a first connecting member (61), a second connecting member (62) and a third connecting member (63), wherein the second connecting member (62) is rotatably connected to the seat frame (2); the first connecting member (61) is provided with two connecting points, wherein the two connecting points of the first connecting member (61) are rotatably connected to the base (1) and the second connecting member (62) respectively; the third connecting member (63) is provided with two connecting points, wherein the two connecting points of the third connecting member (63) are rotatably connected to the main connecting member and the second connecting member (62) respectively; the rotating point of the second connecting member (62) relative to the seat frame (2) is located between the connecting point of the first connecting member (61) and the second connecting member (62), and the connecting point of the third connecting member (63) and the second connecting member (62).

11. The zero-gravity sofa frame structure according to claim 8, characterized in that: The linkage assembly (6) further comprises a first connecting member (61) and a second connecting member (62), wherein the second connecting member (62) is rotatably connected to the seat frame (2); the first connecting member (61) is provided with two connecting points, wherein the two connecting points of the first connecting member (61) are rotatably connected to the base (1) and the second connecting member (62) respectively; the third connecting member (63) is provided with two connecting points, wherein the two connecting points of the third connecting member (63) are rotatably connected to the main connecting member and the second connecting member (62) respectively; the rotating point of the second connecting member (62) relative to the seat frame (2) is located between the connecting point of the first connecting member (61) and the second connecting member (62), and the connecting point of the third connecting member (63) and the second connecting member (62).

12. The zero-gravity sofa frame structure according to claim 9, characterized in that: The linkage assembly (6) further comprises a first connecting member (61) and a second connecting member (62), wherein the second connecting member (62) is rotatably connected to the seat frame (2); the first connecting member (61) is provided with two connecting points, wherein the two connecting points of the first connecting member (61) are rotatably connected to the base (1) and the second connecting member (62) respectively; the third connecting member (63) is provided with two connecting points, wherein the two connecting points of the third connecting member (63) are rotatably connected to the main connecting member and the second connecting member (62) respectively; the rotating point of the second connecting member (62) relative to the seat frame (2) is located between the connecting point of the first connecting member (61) and the second connecting member (62), and the connecting point of the third connecting member (63) and the second connecting member (62).

13. A zero-gravity sofa frame structure according to any one of claims 1 to 6, characterized in that: The leg frame (4) comprises at least one main connecting member, and the main connecting member is rotatably connected to the seat frame (2); the linkage assembly (6) comprises a first connecting member (61), a second connecting member (62) and a third connecting member (63), and the second connecting member (62) is rotatably connected to the seat frame (2); the first connecting member (61) is provided with two connecting points, and the two connecting points of the first connecting member (61) are respectively rotatably connected to the base (1) and the second connecting member (62); the third connecting member (63) is provided with two connecting points, and the two connecting points of the third connecting member (63) are respectively rotatably connected to the main connecting member and the second connecting member (62); the rotation point of the second connecting member (62) relative to the seat frame (2) is located between the connection point of the first connecting member (61) and the second connecting member (62), and the connection point of the third connecting member (63) and the second connecting member (62).

14. The zero-gravity sofa frame structure according to claim 13, characterized in that: The driving member (5) is provided with two connection points. The two connection points of the driving member (5) are respectively rotatably connected to the seat frame (2) and the second connection member (62); or the two connection points of the driving member (5) are respectively rotatably connected to the seat frame (2) and the main connection member; or the two connection points of the driving member (5) are respectively rotatably connected to the seat frame (2) and the base (1).

15. A zero-gravity sofa frame structure according to any one of claims 1 to 6, characterized in that: The leg frame (4) comprises at least one main connecting member, which is rotatably connected to the seat frame (2); the driving member (5) is provided with two connection points. The two connection points of the driving member (5) are rotatably connected to the seat frame (2) and the main connection member respectively; or the two connection points of the driving member (5) are rotatably connected to the seat frame (2) and the base (1) respectively.

16. A zero-gravity sofa frame structure, characterized in that: The invention comprises a base (1), a seat frame (2) slidably arranged on the base (1), a leg frame (4) connected to the seat frame (2), a linkage assembly (6) connected to the base (1) and used for realizing linkage between the seat frame (2) and the leg frame (4), and a driving member (5) used for driving the seat frame (2) to move relative to the base (1) and / or driving the leg frame (4) to move relative to the seat frame (2); The base (1) is provided with a track, and the seat frame (2) is provided with a moving member (21), the moving member (21) being connected to the track and being capable of moving along the track; the track comprises a first portion (111) and a second portion (112), and the slope of a line connecting the head and tail ends of the moving member (21) moving along the track in the first portion (111) is greater than the slope of a line connecting the head and tail ends of the moving member (21) moving along the track in the second portion (112).

17. The zero-gravity sofa frame structure according to claim 16, characterized in that: The track comprises a first track (11) and a second track (12); the moving member (21) is provided with two groups, and the two groups of the moving members (21) are respectively connected to the first track (11) and the second track (12); the front side of the zero-gravity sofa frame structure is defined as the front side, and the first track (11) is located in front of the second track (12); the first part (111) and the second part (112) are included in the first track (11), and the second part (112) is located in front of and above the first part (111).

18. The zero-gravity sofa frame structure according to claim 16, characterized in that: The track comprises a first track (11) and a second track (12); the moving member (21) is provided with two groups, and the two groups of the moving members (21) are respectively connected to the first track (11) and the second track (12); the front side of the zero-gravity sofa frame structure is defined as the front side, and the first track (11) is located behind the second track (12); the first part (111) and the second part (112) are included in the first track (11), and the second part (112) is located in front of and below the first part (111).

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