Seat support mechanism and sofa having the same

Abstract

This utility model provides a seat support mechanism and a sofa having the same. The seat support mechanism includes a base frame, a drive structure, and a support structure. The support structure supports a sitting posture and a TV posture. The drive structure drives and cooperates with the support structure. The support structure includes a back support frame movably connected to the base frame; a seat cushion support frame is adjustablely mounted on the base frame and is a multi-link mechanism; a leg support frame includes a transmission structure and a foot support member. The first connecting end of the transmission structure is connected to the seat cushion support frame, the second connecting end of the transmission structure is connected to the first end of the foot support member, and the third connecting end of the transmission structure is hinged to the middle of the foot support member. When the seat support mechanism is in the TV posture, the first included angle A between the foot support member and the horizontal plane is greater than or equal to 0° and less than or equal to 10°. The technical solution of this application effectively solves the problem of poor user experience in related technologies.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and more specifically, to a seat support mechanism and a sofa having the same. Background Technology

[0002] A movable sofa typically consists of a seat frame and a support cushion structure mounted on the seat frame. By adjusting the relative positions of the various components of the seat frame, the seat frame can move the support cushion structure between different positions, thus enriching the functionality of the movable sofa.

[0003] In the existing technology, the seat frame has a TV position. When the seat frame is in the TV position, the angle between the leg support frame of the seat frame and the horizontal plane is large, which results in poor leg comfort when the user is on the seat frame, that is, a poor user experience. Utility Model Content

[0004] The main purpose of this utility model is to provide a seat support mechanism and a sofa having the same, so as to solve the problem of poor user experience in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a seat support mechanism is provided, comprising: a base frame, a drive structure, and a support structure. The support structure has a sitting posture and a TV posture. The drive structure drives and cooperates with the support structure to switch the support structure between the sitting posture and the TV posture. The support structure includes: a back support frame, which is movably connected to the base frame; a seat cushion support frame, which is adjustablely mounted on the base frame and is a multi-link mechanism; and a leg support frame, which includes a transmission structure and a foot support member. A first connecting end of the transmission structure is connected to the seat cushion support frame, a second connecting end of the transmission structure is connected to a first end of the foot support member, and a third connecting end of the transmission structure is hinged to the middle of the foot support member. When the seat support mechanism is in the TV posture, the first included angle A between the foot support member and the horizontal plane is greater than or equal to 0° and less than or equal to 10°.

[0006] Furthermore, when the support structure is in the TV posture, the first included angle A between the foot support and the horizontal plane is greater than or equal to 0° and less than 8°.

[0007] Furthermore, the first distance D between the hinge point B between the foot support and the third support rod and the hinge point C between the second support rod and the foot support is greater than or equal to 30 mm and less than or equal to 50 mm.

[0008] Furthermore, the support structure also has a lying posture. When the support structure is in a lying posture, the second included angle E between the foot support and the horizontal plane is greater than or equal to 4° and less than or equal to 14°.

[0009] Furthermore, the transmission structure includes a first support rod, a second support rod, and a third support rod. The first end of the first support rod is hinged to the seat support frame, the second end of the first support rod is hinged to the first end of the second support rod, the second end of the second support rod is hinged to the middle of the foot support member, the first end of the third support rod is hinged to the seat support frame, the second end of the third support rod is hinged to the first end of the foot support member, and the second end of the foot support member is a free end. The hinge points of the first support rod and the seat support frame, and the hinge points of the third support rod and the seat support frame, are located at different positions on the seat support frame.

[0010] Furthermore, the seat support frame includes a fifth support rod and a first connecting rod. The first end of the fifth support rod is hinged to the back support frame, the first end of the first support rod is hinged to the second end of the fifth support rod, the first end of the first connecting rod is hinged to the middle of the fifth support rod, the first end of the third support rod is hinged to the second end of the first connecting rod, and the first connecting rod and the fifth support rod are hinged at a preset hinge point. The distance between the preset hinge point and the first end of the fifth support rod is greater than the distance between the preset hinge point and the second end of the fifth support rod.

[0011] Furthermore, the seat support mechanism also includes a second connecting rod and a third connecting rod. The drive structure is driven to cooperate with the first end of the second connecting rod. The second end of the second connecting rod is hinged to the first end of the third connecting rod. The hinge point between the first connecting rod and the fifth support rod is located between the hinge point between the second connecting rod and the fifth support rod and the second end of the fifth support rod. The second end of the third connecting rod is hinged to the middle of the first connecting rod. The seat support mechanism also includes a first transmission component, a second transmission component, and a third transmission component. The first end of the first transmission component is hinged to the fifth support rod; the second end of the first transmission component is hinged to the first end of the third transmission component; the first end of the second transmission component is hinged to the middle of the first transmission component; the second end of the second transmission component is hinged to the back support frame; and the second end of the third transmission component is hinged to the base frame. The seat support mechanism also includes a fourth transmission component, a fifth transmission component, and a sixth transmission component. The first end of the fourth transmission component is hinged to the middle of the third transmission component; the second end of the fourth transmission component is hinged to the first end of the fifth transmission component; the second end of the fifth transmission component is hinged to the first end of the sixth transmission component; the second end of the sixth transmission component is hinged to the middle of the first connecting rod; and the middle of the fifth transmission component is hinged to the fifth support rod. The back support frame includes a sixth support rod, a seventh transmission component, an eighth transmission component, and a ninth transmission component. The first end of the sixth support rod is hinged to the first end of the fifth support rod, and the second end of the sixth support rod is a free end. The first end of the seventh transmission component is hinged to the base frame, and the second end of the seventh transmission component is hinged to the first end of the eighth transmission component. The first end of the ninth transmission component is hinged to the sixth support rod, and the second end of the ninth transmission component is hinged to the second end of the eighth transmission component. The eighth transmission component has a protruding middle section, which is hinged to the second end of the second transmission component. The eighth transmission component is also hinged to the fifth support rod. The hinge points between the eighth transmission component and the second end of the second transmission component, as well as the hinge points between the eighth transmission component and the fifth support rod, are located at different positions on the eighth transmission component.

[0012] Furthermore, the second distance G between the hinge point F of the first connecting rod and the third support rod and the hinge point B of the foot support and the third support rod is greater than or equal to 295 mm and less than or equal to 305 mm, and the third distance J between the hinge point H of the first support rod and the fifth support rod and the hinge point I of the first support rod and the third support rod is greater than or equal to 185 mm and less than or equal to 195 mm.

[0013] Furthermore, the second distance G between the hinge point F of the first connecting rod and the third support rod and the hinge point B of the foot support and the third support rod is greater than or equal to 285mm and less than 295mm, and the third distance J between the hinge point H of the first support rod and the fifth support rod and the hinge point I of the first support rod and the third support rod is greater than 195mm and less than or equal to 205mm.

[0014] According to another aspect of the present invention, a sofa is provided, including a seat support mechanism, wherein the seat support mechanism is the aforementioned seat support mechanism.

[0015] The seat support mechanism of this utility model includes a base frame, a drive structure, and a support structure. The drive structure and the support structure work together to switch the support structure between a sitting posture and a TV posture. The support structure includes a back support frame, a seat cushion support frame, and a leg support frame. The back support frame is hinged to the base frame, and the seat cushion support frame is mounted on the base frame. The position of the seat cushion support frame is adjustable, and the seat cushion support frame is a multi-link mechanism. The leg support frame includes a transmission structure and a foot support member. The first connecting end of the transmission structure is connected to the seat cushion support frame, the second connecting end of the transmission structure is connected to the first end of the foot support member, and the third connecting end of the transmission structure is hinged to the middle of the foot support member. When the seat support mechanism is in the TV posture, the first included angle A between the foot support member and the horizontal plane is greater than or equal to 0° and less than or equal to 10°. With the above-described configuration, when the drive structure switches between a seated posture and a TV posture, the relative positions of the back support frame, seat cushion support frame, transmission structure, and foot support can change, thereby changing the relative position of the foot support with respect to the horizontal plane. When the seat support mechanism is in the TV posture, the first included angle A between the foot support and the horizontal plane is greater than or equal to 0° and less than or equal to 10°, thus improving user comfort. Therefore, the technical solution of this application effectively solves the problem of poor user experience in related technologies. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A front view schematic diagram of an embodiment of the seat support mechanism according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A partially enlarged schematic diagram of point a of the seat support mechanism;

[0019] Figure 3 It shows Figure 1 A front view schematic diagram of the support structure of the seat bracket mechanism when it is in the TV posture;

[0020] Figure 4 It shows Figure 3 A partially enlarged schematic diagram of point b of the seat support mechanism;

[0021] Figure 5It shows Figure 1 A three-dimensional structural diagram of the support structure of the seat bracket mechanism when in a reclining position;

[0022] Figure 6 It shows Figure 5 A front view schematic diagram of the seat support mechanism;

[0023] Figure 7 It shows Figure 1 A three-dimensional structural diagram of the connection between the base frame of the seat support mechanism and the drive structure;

[0024] Figure 8 It shows Figure 7 A three-dimensional structural diagram of part of the seat support mechanism.

[0025] The above figures include the following reference numerals:

[0026] 10. Base frame; 20. Drive structure; 30. Support structure; 31. Back support frame; 311. Sixth support rod; 312. Seventh transmission component; 313. Eighth transmission component; 314. Ninth transmission component; 32. Seat cushion support frame; 321. Fifth support rod; 322. First connecting rod; 33. Leg support frame; 331. First support rod; 332. Second support rod; 333. Third support rod; 334. Foot support component; 40. Second connecting rod; 50. Third connecting rod; 60. First transmission component; 70. Second transmission component; 80. Third transmission component; 90. Fourth transmission component; 100. Fifth transmission component; 110. Sixth transmission component. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0030] like Figure 1 , Figure 3 , Figure 7 as well as Figure 8 As shown, the seat support mechanism of this embodiment includes: a base frame 10, a drive structure 20, and a support structure 30. The support structure 30 has a sitting posture and a TV posture. The drive structure 20 drives the support structure 30 to switch between the sitting posture and the TV posture. The support structure 30 includes: a back support frame 31, a seat cushion support frame 32, and a leg support frame 33. The back support frame 31 is movably connected to the base frame 10. The seat cushion support frame 32 is adjustablely mounted on the base frame 10 and is a multi-link mechanism. The leg support frame 33 includes a transmission structure and a foot support member 334. The first connecting end of the transmission structure is connected to the seat cushion support frame 32, the second connecting end of the transmission structure is connected to the first end of the foot support member 334, and the third connecting end of the transmission structure is hinged to the middle of the foot support member 334. The hinge point between the first support rod 331 and the seat support frame 32 and the hinge point between the third support rod 333 and the seat support frame 32 are located at different positions on the seat support frame 32. When the seat support mechanism is in the TV posture, the first included angle A between the foot support 334 and the horizontal plane is greater than or equal to 0° and less than or equal to 10°.

[0031] Using the technical solution of this embodiment, the seat support mechanism includes a base frame 10, a drive structure 20, and a support structure 30. The drive structure 20 and the support structure 30 are driven together to allow the support structure 30 to switch between a sitting posture and a TV posture. The support structure 30 includes a back support frame 31, a seat cushion support frame 32, and a leg support frame 33. The back support frame 31 is hinged to the base frame 10, and the seat cushion support frame 32 is mounted on the base frame 10. The position of the seat cushion support frame 32 is adjustable, and the seat cushion support frame 32 is a multi-link mechanism. The leg support frame 33 includes a transmission structure and a foot support member 334. The first connecting end of the transmission structure is connected to the seat cushion support frame 32, the second connecting end of the transmission structure is connected to the first end of the foot support member 334, and the third connecting end of the transmission structure is hinged to the middle of the foot support member. When the seat support mechanism is in the TV posture, the first included angle A between the foot support member 334 and the horizontal plane is greater than or equal to 0° and less than or equal to 10°. With the above-described configuration, when the drive structure 20 drives the support structure 30 to switch between a sitting posture and a TV posture, the relative positions of the back support frame 31, seat cushion support frame 32, transmission structure, and foot support member 334 can change, thereby changing the relative position of the foot support member 334 with respect to the horizontal plane. When the seat support mechanism is in the TV posture, the first included angle A between the foot support member 334 and the horizontal plane is greater than or equal to 0° and less than or equal to 10°, making the relative position of the foot support member 334 with respect to the horizontal plane more reasonable, thus making the user experience more comfortable. Therefore, the technical solution of this embodiment effectively solves the problem of poor user experience in related technologies.

[0032] It should be noted that the value of the first included angle A can be 0°, 1°, 2°, 3°, 4°, 5°, 5.5°, 5.8°, 6°, 6.2°, 6.5°, 7°, 8°, 9°, or 10°. In this embodiment, the value of the first included angle A is 6°.

[0033] Figure 1 The support structure 30 of the seat bracket mechanism shown is in a seated position.

[0034] The seat support mechanism in this embodiment is a zero-gravity experience seat support mechanism. By limiting the value of the first included angle A, the angle between the foot support and the horizontal plane is made gentler, thereby improving comfort.

[0035] like Figure 3As shown, in this embodiment, when the support structure 30 is in the TV posture, the first angle A between the foot support 334 and the horizontal plane is greater than or equal to 0° and less than 8°. By limiting the first angle A between the foot support 334 and the horizontal plane when the support structure 30 is in the TV posture, the position of the foot support 334 relative to the horizontal plane is more reasonable, thereby making the user's body posture more comfortable.

[0036] like Figure 1 , Figure 3 , Figure 7 as well as Figure 8 As shown, in this embodiment, the transmission structure includes a first support rod 331, a second support rod 332, and a third support rod 333. The first end of the first support rod 331 is hinged to the seat support frame 32, the second end of the first support rod 331 is hinged to the first end of the second support rod 332, the second end of the second support rod 332 is hinged to the middle of the foot support member 334, the first end of the third support rod 333 is hinged to the seat support frame 32, and the second end of the third support rod 333 is hinged to the first end of the foot support member 334. The second end of the foot support member 334 is a free end. The hinge points of the first support rod 331 and the seat support frame 32, and the hinge points of the third support rod 333 and the seat support frame 32, are located at different positions on the seat support frame 32. When the drive structure drives the support structure to move, the relative positions of the first support rod, the second support rod, and the third support rod can change, thereby changing the position of the foot support member.

[0037] like Figure 2 As shown, in this embodiment, the first distance D between the hinge point B of the foot support 334 and the third support rod 333, and the hinge point C of the second support rod 332 and the foot support 334, is greater than or equal to 30 mm and less than or equal to 50 mm. By limiting the first distance D between the hinge point B of the foot support 334 and the third support rod 333, and the hinge point C of the second support rod 332 and the foot support 334, the relative positions between the hinge points B of the foot support 334 and the third support rod 333, and the hinge point C of the second support rod 332 and the foot support 334, are more reasonable. This makes the relative position of the foot support 334 and the horizontal plane more reasonable when the support structure 30 is in the TV posture, resulting in a more comfortable posture for the user.

[0038] In this embodiment, when the first included angle A is 0°, the first distance D is 38.77 mm. When the first included angle A is 6°, the first distance D is 36.48 mm. When the first included angle A is 10°, the first distance D is 35.11 mm.

[0039] Of course, the first distance D can be 30 mm, 32 mm, 33 mm, 35 mm, 35.1 mm, 35.11 mm, 35.3 mm, 36 mm, 37 mm, 38 mm, 38.5 mm, 38.7 mm, 38.75 mm, 38.77 mm, 38.8 mm, 39 mm, 40 mm, 40.5 mm, 40.6 mm, 40.7 mm, 40.76 mm, 40.78 mm, 40.8 mm, 41 mm, 42 mm, 45 mm, 46 mm, 48 mm, or 50 mm.

[0040] Preferably, in this embodiment, the first distance D between the hinge point B of the foot support 334 and the third support rod 333 and the hinge point C of the second support rod 332 and the foot support 334 is greater than or equal to 35 mm and less than or equal to 40 mm.

[0041] like Figure 4 and Figure 6 As shown, in this embodiment, the support structure 30 also has a lying posture. When the support structure 30 is in the lying posture, the second angle E between the foot support 334 and the horizontal plane is greater than or equal to 4° and less than or equal to 14°. Through the above settings, the second angle between the foot support 334 and the horizontal plane is more reasonable when the support structure 30 is in the lying posture, thereby making the user's posture more comfortable.

[0042] When the support structure 30 is in a lying position, the second included angle E between the foot support 334 and the horizontal plane can be 4°, 5°, 6°, 7°, 8°, 9°, 10.01°, 10°, 10.02°, 11°, 12°, 13° or 14°.

[0043] Preferably, when the support structure 30 is in a lying position, the second angle E between the foot support 334 and the horizontal plane is greater than or equal to 8° and less than or equal to 12°. In this embodiment, when the support structure 30 is in a lying position, the second angle E between the foot support 334 and the horizontal plane is 10°.

[0044] like Figure 1 as well as Figures 3 to 6As shown, in this embodiment, the seat support frame 32 includes a fifth support rod 321 and a first connecting rod 322. The first end of the fifth support rod 321 is hinged to the back support frame 31. The first end of the first support rod 331 is hinged to the second end of the fifth support rod 321. The first end of the first connecting rod 322 is hinged to the middle of the fifth support rod 321. The first end of the third support rod 333 is hinged to the second end of the first connecting rod 322. The first connecting rod 322 and the fifth support rod 321 are hinged at a preset hinge point. The distance between the preset hinge point and the first end of the fifth support rod 321 is greater than the distance between the preset hinge point and the second end of the fifth support rod 321. The movement of the first connecting rod 322 can drive the movement of the fifth support rod 321 and the third support rod 333. The fifth support rod 321 can drive the first support rod 331 to move. The movement of the first support rod 331 can drive the movement of the second support rod 332. In turn, the second support rod 332 can drive the foot support 334 to move, thereby changing the relative position of the foot support 334 with the horizontal plane, and thus enabling the support structure 30 to switch between sitting, TV, and lying postures.

[0045] It should be noted that the fifth support rod 321 and the back support frame 31 can be directly connected, that is, the fifth support rod 321 and the back support frame 31 are hinged together. Of course, a rod can also be provided between the fifth support rod 321 and the back support frame 31, and both the fifth support rod 321 and the back support frame 31 are hinged to the rod, that is, the fifth support rod 321 and the back support frame 31 are indirectly connected through the rod.

[0046] like Figure 1 as well as Figures 3 to 6 As shown, in this embodiment, the seat support mechanism further includes a second connecting rod 40 and a third connecting rod 50. The drive structure 20 is driven to engage with the first end of the second connecting rod 40. The second end of the second connecting rod 40 is hinged to the first end of the third connecting rod 50. The hinge point between the first connecting rod 322 and the fifth support rod 321 is located between the hinge point of the second connecting rod 40 and the fifth support rod 321 and the second end of the fifth support rod 321. The second end of the third connecting rod 50 is hinged to the middle of the first connecting rod 322. The drive structure 20 can drive the second connecting rod 40 to move, which in turn drives the third connecting rod 50 to move, and the third connecting rod 50 can then drive the first connecting rod 322 to move.

[0047] It should be noted that the drive structure 20 includes a motor, a slider, a slide rail, a first drive rod, and a second drive rod. The motor, slider, and slide rail are all mounted on the base frame 10. The slider is guided and engaged with the slide rail. The motor drives the slider to slide on the slide rail. The first end of the first drive rod is hinged to the slider, the second end of the first drive rod is hinged to the middle of the second drive rod, and one end of the second drive rod is connected to the second connecting rod 40. The fifth support rod 321 is provided with a clearance hole to allow the second drive rod to pass through, and the second drive rod passes through the clearance hole to connect with the second connecting rod 40.

[0048] like Figure 1 as well as Figures 3 to 6As shown, in this embodiment, the seat support mechanism further includes a first transmission member 60, a second transmission member 70, and a third transmission member 80. The first end of the first transmission member 60 is hinged to the fifth support rod 321, the second end of the first transmission member 60 is hinged to the first end of the third transmission member 80, the first end of the second transmission member 70 is hinged to the middle of the first transmission member 60, the second end of the second transmission member 70 is hinged to the back support frame 31, and the second end of the third transmission member 80 is hinged to the base frame 10. The seat support mechanism also includes a fourth transmission member 90, a fifth transmission member 100, and a sixth transmission member 110. The first end of the fourth transmission member 90 is hinged to the middle of the third transmission member 80, the second end of the fourth transmission member 90 is hinged to the first end of the fifth transmission member 100, the second end of the fifth transmission member 100 is hinged to the first end of the sixth transmission member 110, the second end of the sixth transmission member 110 is hinged to the middle of the first connecting rod 322, and the middle of the fifth transmission member 100 is hinged to the middle of the fifth support rod 321. The back support frame 31 includes a sixth support rod 311, a seventh transmission member 312, an eighth transmission member 313, and a ninth transmission member 314. The first end of the sixth support rod 311 is hinged to the first end of the fifth support rod 321, and the second end of the sixth support rod 311 is a free end. The two ends of the seventh transmission member 312 are respectively hinged to the base frame 10 and the first end of the eighth transmission member 313. The first end of the ninth transmission member 314 is hinged to the sixth support rod 311, and the second end of the ninth transmission member 314 is hinged to the second end of the eighth transmission member 313. The eighth transmission member 313 has a protruding middle section, which is hinged to the second end of the second transmission member 70. The eighth transmission member 313 is also hinged to the fifth support rod 321. The hinge points between the eighth transmission member 313 and the second end of the second transmission member 70, and between the eighth transmission member 313 and the fifth support rod 321, are located at different positions on the eighth transmission member 313. The first connecting rod 322 can drive the sixth transmission component 110 to move, which in turn drives the fifth transmission component 100 to move, which in turn drives the fourth transmission component 90 to move, which in turn drives the third transmission component 80 to move relative to the base frame 10, which in turn drives the first transmission component 60 to move, which in turn drives the fifth support rod 321 and the second transmission component 70 to move, which in turn drives the eighth transmission component 313 to move relative to the fifth support rod 321, which in turn drives the seventh transmission component 312 to move relative to the base frame 10, which in turn drives the ninth transmission component 314 to move, which in turn drives the sixth support rod 311 to move relative to the fifth support rod 321.

[0049] It should be noted that the hinge point between the fifth transmission component 100 and the fifth support rod 321 is located between the first end of the fifth support rod 321 and the preset hinge point.

[0050] The foot support 334, the fifth support rod 321 and the sixth support rod 311 each include two symmetrically arranged surfaces about the width of the base frame 10.

[0051] like Figure 3 and Figure 4 As shown, in this embodiment, the second distance G between the hinge point F of the first connecting rod 322 and the third support rod 333 and the hinge point B of the foot support 334 and the third support rod 333 is greater than or equal to 285mm and less than 295mm, and the third distance J between the hinge point H of the first support rod 331 and the fifth support rod 321 and the hinge point I of the first support rod 331 and the third support rod 333 is greater than 195mm and less than or equal to 205mm. By limiting the second distance G and the third distance J, when the driving structure 20 drives the support structure 30 to switch to the TV posture, the angle between the foot support 334 and the horizontal plane can be within the range of the first angle A.

[0052] In this embodiment, the second distance G can be 285 mm, 286 mm, 287 mm, 288 mm, 289 mm, 290 mm, 291 mm, 291.5 mm, 291.6 mm, 291.7 mm, 291.78 mm, 291.8 mm, 292 mm, 292.5 mm, 293 mm, 294 mm, or 294.5 mm. The third distance J can be 195.1 mm, 196 mm, 196.1 mm, 196.15 mm, 196.18 mm, 196.19 mm, 196.2 mm, 197 mm, 198 mm, 200 mm, 203 mm, or 205 mm. The fourth distance L between the hinge point K of the sixth transmission member 110 and the first connecting rod 322 and the hinge point F of the first connecting rod 322 and the third support rod 333 is greater than 158 mm and less than or equal to 159 mm. The fourth distance L can be 158.2 mm, 158.4 mm, 158.5 mm, 158.6 mm, 158.65 mm, 158.67 mm, 158.69 mm, 158.7 mm, or 159 mm. In this embodiment, when the first distance D is 36.48 mm, the second distance G is 291.78 mm, the third distance J is 196.18 mm, and the fourth distance L is 158.67 mm.

[0053] The difference between other embodiments and this embodiment is that: the length of the third support rod 333 is increased, the first distance D is changed, the position of the hinge point K between the sixth transmission member 110 and the first connecting rod 322 moves toward the direction closer to the back support frame 31, and the position of the hinge point I between the first support rod 331 and the third support rod 333 moves toward the direction closer to the back support frame 31. By lengthening the third support rod 333 and changing the position of the hinge point I between the first support rod 331 and the third support rod 333, the distance between the second end of the third support rod 333 and the ground is greater when the third support rod 333 is raised, thereby allowing the first end of the foot support member 334 to move toward the direction closer to the back support frame 31. Figure 3 Moving the upper left corner can also achieve the angle value of the first included angle A in this embodiment.

[0054] like Figure 3 and Figure 4 As shown, in other embodiments, the second distance G between the hinge point F of the first connecting rod 322 and the third support rod 333 and the hinge point B of the foot support 334 and the third support rod 333 is greater than or equal to 295 mm and less than or equal to 305 mm, and the third distance J between the hinge point H of the first support rod 331 and the fifth support rod 321 and the hinge point I of the first support rod 331 and the third support rod 333 is greater than or equal to 185 mm and less than or equal to 195 mm. By limiting the second distance G and the third distance J, when the drive structure 20 drives the support structure 30 to switch to the TV posture, the angle between the foot support 334 and the horizontal plane can be within the range of the first angle A.

[0055] In other embodiments, preferably, the first distance D between the hinge point B of the foot support 334 and the third support rod 333 and the hinge point C of the second support rod 332 and the foot support 334 is greater than 40 mm and less than or equal to 50 mm.

[0056] In other embodiments, the first distance D can be 40.1 mm, 40.5 mm, 40.6 mm, 40.7 mm, 40.76 mm, 40.78 mm, 40.8 mm, 41 mm, 42 mm, 45 mm, 46 mm, 48 mm, or 50 mm. The second distance G can be 295 mm, 296 mm, 297 mm, 298 mm, 299 mm, 300 mm, 300.1 mm, 300.2 mm, 300.25 mm, 300.3 mm, 300.5 mm, 301 mm, 302 mm, 303 mm, 304 mm, or 305 mm. The third distance J can be 185mm, 187mm, 188mm, 190mm, 191mm, 192mm, 192.5mm, 192.53mm, 192.54mm, 192.55mm, 192.6mm, 193mm, or 195mm. The fourth distance L between the hinge point K of the sixth transmission member 110 and the first connecting rod 322 and the hinge point F of the first connecting rod 322 and the third support rod 333 is greater than or equal to 157mm and less than or equal to 158mm. The fourth distance L can be 157mm, 157.2mm, 157.5mm, 157.6mm, 157.7mm, 157.72mm, 157.75mm, 157.78mm, or 158mm. When the first distance D is 40.76 mm, the second distance G is 300.25 mm, the third distance J is 192.54 mm, and the fourth distance L is 157.72 mm, the first included angle A is 6°.

[0057] The sofa in this embodiment includes a seat support mechanism, which is the seat support mechanism described above. By setting the angle value of the first included angle A, the seat support mechanism allows for a more reasonable relative position between the foot support member 334 and the horizontal plane, thereby improving user comfort. The sofa with the aforementioned seat support mechanism also possesses the advantages described above.

[0058] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0059] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0061] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A seat support mechanism, characterized by, include: The base frame (10), drive structure (20) and support structure (30) are provided. The support structure (30) has a sitting posture and a TV posture. The drive structure (20) drives the support structure (30) to switch between the sitting posture and the TV posture. The support structure (30) includes: A back support frame (31) is movably connected to the base frame (10); A seat support frame (32) is adjustablely mounted on the base frame (10). The seat support frame (32) is a multi-link mechanism. A leg support frame (33) includes a transmission structure and a foot support (334). The first connecting end of the transmission structure is connected to the seat support frame (32), the second connecting end of the transmission structure is connected to the first end of the foot support (334), and the third connecting end of the transmission structure is hinged to the middle of the foot support (334). When the seat support mechanism is in the TV posture, the first included angle A between the foot support (334) and the horizontal plane is greater than or equal to 0° and less than or equal to 10°.

2. The seat support mechanism of claim 1, wherein, When the support structure (30) is in the TV posture, the first included angle A between the foot support (334) and the horizontal plane is greater than or equal to 0° and less than 8°.

3. The seat support mechanism according to claim 1 or 2, characterized in that, The transmission structure includes a first support rod (331), a second support rod (332), and a third support rod (333). The first end of the first support rod (331) is hinged to the seat support frame (32), the second end of the first support rod (331) is hinged to the first end of the second support rod (332), the second end of the second support rod (332) is hinged to the middle of the foot support member (334), the first end of the third support rod (333) is hinged to the seat support frame (32), the second end of the third support rod (333) is hinged to the first end of the foot support member (334), and the second end of the foot support member (334) is a free end. The hinge point between the first support rod (331) and the seat support frame (32) and the hinge point between the third support rod (333) and the seat support frame (32) are located at different positions on the seat support frame (32).

4. The seat support mechanism of claim 3, wherein, The first distance D between the hinge point B between the foot support (334) and the third support rod (333) and the hinge point C between the second support rod (332) and the foot support (334) is greater than or equal to 30 mm and less than or equal to 50 mm.

5. The seat support mechanism according to claim 1 or 2, characterized in that, The support structure (30) also has a lying posture. When the support structure (30) is in the lying posture, the second included angle E between the foot support (334) and the horizontal plane is greater than or equal to 4° and less than or equal to 14°.

6. The seat support mechanism of claim 3, wherein, The seat support frame (32) includes a fifth support rod (321) and a first connecting rod (322). The first end of the fifth support rod (321) is hinged to the back support frame (31). The first end of the first support rod (331) is hinged to the second end of the fifth support rod (321). The first end of the first connecting rod (322) is hinged to the middle of the fifth support rod (321). The first end of the third support rod (333) is hinged to the second end of the first connecting rod (322). The first connecting rod (322) is hinged to the fifth support rod (321) at a preset hinge point. The distance between the preset hinge point and the first end of the fifth support rod (321) is greater than the distance between the preset hinge point and the second end of the fifth support rod (321).

7. The seat support mechanism according to claim 6, characterized in that, The seat support mechanism further includes a second connecting rod (40) and a third connecting rod (50). The drive structure (20) drives and cooperates with the first end of the second connecting rod (40). The second end of the second connecting rod (40) is hinged to the first end of the third connecting rod (50). The hinge point of the first connecting rod (322) and the fifth support rod (321) is located between the hinge point of the second connecting rod (40) and the fifth support rod (321) and the second end of the fifth support rod (321). The second end of the third connecting rod (50) is hinged to the middle of the first connecting rod (322). The seat support mechanism further includes a first transmission member (60), a second transmission member (70), and a third transmission member (80). The first end of the first transmission member (60) is hinged to the fifth support rod (321), the second end of the first transmission member (60) is hinged to the first end of the third transmission member (80), the first end of the second transmission member (70) is hinged to the middle of the first transmission member (60), the second end of the second transmission member (70) is hinged to the back support frame (31), and the second end of the third transmission member (80) is hinged to the base frame (10). The seat support mechanism further includes a fourth transmission member (90), a fifth transmission member (100), and a sixth transmission member (110). The first end of the fourth transmission member (90) is hinged to the middle of the third transmission member (80), the second end of the fourth transmission member (90) is hinged to the first end of the fifth transmission member (100), the second end of the fifth transmission member (100) is hinged to the first end of the sixth transmission member (110), the second end of the sixth transmission member (110) is hinged to the middle of the first connecting rod (322), and the middle of the fifth transmission member (100) is hinged to the middle of the fifth support rod (321). The back support frame (31) includes a sixth support rod (311), a seventh transmission component (312), an eighth transmission component (313), and a ninth transmission component (314). The first end of the sixth support rod (311) is hinged to the first end of the fifth support rod (321), and the second end of the sixth support rod (311) is a free end. The first end of the seventh transmission component (312) is hinged to the base frame (10), and the second end of the seventh transmission component (312) is hinged to the first end of the eighth transmission component (313). The first end of the ninth transmission component (314) is hinged to the sixth support rod (311), and the second end of the ninth transmission component (314) is hinged to the second end of the eighth transmission component (313). The eighth transmission component (313) has a protruding middle section, and the middle section of the eighth transmission component (313) is hinged to the second end of the second transmission component (70). The eighth transmission component (313) is also hinged to the fifth support rod (321). The hinge point between the eighth transmission member (313) and the second end of the second transmission member (70) and the hinge point between the eighth transmission member (313) and the fifth support rod (321) are located at different positions of the eighth transmission member (313).

8. The seat support mechanism of claim 7, wherein, The second distance G between the hinge point F of the first connecting rod (322) and the third support rod (333) and the hinge point B of the foot support (334) and the third support rod (333) is greater than or equal to 285 mm and less than 295 mm. The third distance J between the hinge point H of the first support rod (331) and the fifth support rod (321) and the hinge point I of the first support rod (331) and the third support rod (333) is greater than 195 mm and less than or equal to 205 mm.

9. The seat support mechanism of claim 7, wherein, The second distance G between the hinge point F of the first connecting rod (322) and the third support rod (333) and the hinge point B of the foot support (334) and the third support rod (333) is greater than or equal to 295 mm and less than or equal to 305 mm. The third distance J between the hinge point H of the first support rod (331) and the fifth support rod (321) and the hinge point I of the first support rod (331) and the third support rod (333) is greater than or equal to 185 mm and less than or equal to 195 mm.

10. A sofa comprising a seat support mechanism, characterised in that, The seat support mechanism is the same as any one of claims 1 to 9.

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