A three-position frame structure and sofa structure

Abstract

This invention relates to the field of furniture technology, and more particularly to a three-position frame structure and sofa structure. The frame includes a seat frame and the following components mounted on the seat frame: a first telescopic unit connected to the bottom of the seat frame; a leg rest fixed to the end of the first telescopic unit; a drive mechanism rotatably connected at one end to the bottom side of the seat frame and at the other end to the first telescopic unit; a backrest frame rotatably connected to the seat frame and located away from the leg rest; and a second telescopic unit rotatably connected to the backrest frame to change the angle of the backrest frame. The second telescopic unit is rotatably connected to the first telescopic unit. When the drive mechanism retracts to its initial state, it is in a sitting position. When the drive mechanism extends, it first extends the first telescopic unit outside the seat frame to form a TV position, and then the first telescopic unit drives the second telescopic unit to change the angle of the backrest frame to form a reclining position. This design improves the stability of the sofa and also enhances the comfort of the three-position adjustment.

Description

Technical Field

[0001] This invention relates to the field of furniture technology, and in particular to a three-position frame structure and sofa structure. Background Art

[0002] An electric sofa is a type of modern furniture with a wide range of functions. It typically offers a variety of adjustable positions through a combination of motors, such as a sitting position suitable for reading or working, a TV position suitable for watching TV or leisure activities, and a reclining position suitable for relaxation or rest.

[0003] There are various types of three-position sofa structures in the existing technology. Most of them achieve the adjustment of the angle between the leg board, seat board and backrest by moving an electric push rod. For example, Chinese utility model patent with authorization announcement number CN215959113U disclosed on March 8, 2022, a telescopic iron frame for electric sofa. By setting telescopic mechanisms on both sides of the telescopic iron frame, the driver can drive the second linkage assembly to move, thereby causing the leg support mounting plate to unfold. The front of the sofa seat mounting plate is lifted by the first linkage assembly, which makes it easy for the sofa to be adjusted between sitting, TV, and reclining postures.

[0004] However, the inventors discovered that existing three-position sofas have two main drawbacks. First, their complex structure leads to higher production and maintenance costs. Second, the seat cushions of existing three-position sofas often move together with the leg rests. This structure not only affects the stability of the sofa structure, but also may cause the buttocks to tilt downwards or slide when the body tilts the footrest and seat cushion at the same time, thus affecting comfort. Summary of the Invention

[0005] In view of at least one of the above technical problems, the present invention provides a three-position frame structure and sofa structure, which improves the structural stability of the three-position sofa and reduces the cost by adopting structural improvements.

[0006] According to a first aspect of the present invention, a three-position frame structure is provided, comprising a seat frame and a mounting on the seat frame:

[0007] The first telescopic unit is connected to the bottom of the seat frame and can extend or retract toward the front end of the seat frame;

[0008] Leg rests are fixed to the end of the first telescopic unit;

[0009] The drive mechanism is rotatably connected at one end to the bottom side of the seat frame and rotatably connected at the other end to the first telescopic unit.

[0010] The backrest frame is rotatably connected to the seat frame and is located on the side away from the leg rest.

[0011] The second telescopic unit is rotatably connected to the backrest frame to drive the change of the angle of the backrest frame;

[0012] The second telescopic unit is rotatably connected to the first telescopic unit. When the drive mechanism is retracted to the initial state, it is in a sitting position. When the drive mechanism is extended, it first extends the first telescopic unit outside the seat frame to form a TV position, and then the first telescopic unit drives the second telescopic unit to change the angle of the backrest frame to form a reclining position.

[0013] In some embodiments of the present invention, the seat frame includes armrest frames disposed on both sides and a seat frame connected to the inner sides of the two armrest frames.

[0014] In some embodiments of the present invention, the handrail frame includes a handrail frame and two legs connected to the handrail frame, the two legs being arranged in parallel and integrally formed with the handrail frame.

[0015] In some embodiments of the present invention, the first telescopic unit includes:

[0016] The first connecting rod is rotatably connected at one end to the leg rest plate;

[0017] The second link has one end rotatably connected to the bottom of the seat frame and the other end pivotally connected to the other end of the first link to form a V-shaped telescopic structure.

[0018] The third link is rotatably connected at one end to the leg rest plate and rotatably connected at the middle to the middle of the second link, so that the first link, the second link and the third link form a quadrilateral structure, and the other end of the third link protrudes out of the second link.

[0019] In some embodiments of the present invention, the first telescopic unit further includes a T-shaped push rod, the T-shaped push rod including a horizontal bar and a vertical bar connected to the horizontal bar, one end of the horizontal bar being rotatably connected to the bottom of the seat frame, and the far end of the vertical bar being rotatably connected to one end of the third connecting rod protruding from the second connecting rod;

[0020] The driving mechanism is an electric push rod, and the driving end of the electric push rod is rotatably connected to the middle of the vertical rod of the T-shaped push rod.

[0021] In some embodiments of the present invention, the first telescopic unit is symmetrically arranged on both sides of the seat frame in the width direction, a support rod is connected between the two T-shaped push rods, the support rod is fixed on the two vertical rods, and the electric push rod is rotatably connected to the middle of the support rod.

[0022] In some embodiments of the present invention, the second telescopic unit includes:

[0023] A support plate, which is fixed to the seat frame;

[0024] The three-end connector has its first end rotatably connected to the support plate and its second end fixedly connected to the side wall of the backrest frame.

[0025] The swing arm assembly has one end connected to the third end of the three-end connector and the other end rotatably connected to the other end of the crossbar of the T-shaped push rod, so that the angle of the backrest frame can be changed by rotating the T-shaped push rod.

[0026] In some embodiments of the present invention, the swing arm assembly includes a swing arm and a push-pull arm;

[0027] One end of the swing rod is rotatably connected to the three-end connector, and the other end is rotatably connected to the push-pull rod. The other end of the push-pull rod is rotatably connected to the crossbar.

[0028] The support plate has a guide rail, and the swing rod and push-pull rod are rotatably connected within the guide rail. The guide rail includes an arc segment and a straight segment. The swing rod is configured to rotate only within the arc segment during the process of the three-attitude frame structure being driven to the TV pose.

[0029] In some embodiments of the present invention, the guide rail is a guide groove disposed on the support plate, and a roller is rotatably connected in the guide groove. The swing rod and the push-pull rod are both rotatably connected to the roller.

[0030] According to a second aspect of the invention, a sofa structure is also provided, comprising a three-position frame structure as described in any one of the first aspects.

[0031] The beneficial effects of the present invention are as follows: In the three-position frame structure of the present invention, the seat frame is fixed, and the first telescopic unit and the second telescopic unit drive the movement of each leg rest and backrest frame respectively under the drive mechanism. Compared with the prior art, the structural stability of the three-position sofa is improved. Furthermore, through the linkage of the first telescopic unit and the second telescopic unit, the TV posture can be adjusted first, and then the reclining posture can be adjusted. Compared with the prior art, the structure is simpler and can improve the user's comfort. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is a schematic diagram of the TV pose in the three-pose frame structure of this invention embodiment;

[0034] Figure 2 This is a schematic diagram of the seated posture in the three-posture frame structure of this invention embodiment;

[0035] Figure 3 This is a schematic diagram of the lying posture structure in the three-posture frame structure of this invention embodiment;

[0036] Figure 4 This is a three-dimensional structural diagram of the three-position frame structure in an embodiment of the present invention;

[0037] Figure 5 This is a three-dimensional structural diagram of the three-position frame structure in an embodiment of the present invention (handrail frame omitted).

[0038] Figure 6 This is a schematic diagram of the three-position structure of the first telescopic unit in an embodiment of the present invention;

[0039] Figure 7 This is a three-dimensional structural diagram of the three-position frame structure from another perspective in an embodiment of the present invention (handrail frame omitted).

[0040] Figure 8 As described in the embodiments of the present invention Figure 7 A magnified schematic diagram of the structure at point A in the diagram;

[0041] Figure 9 This is a schematic diagram of the connection structure between the support plate, the three-end connector and the swing rod in an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of the three-position structure of the second telescopic unit in an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached drawings: 1. Seat frame; 11. Armrest frame; 11a. Armrest bracket; 11b. Support leg; 12. Seat frame; 2. First telescopic unit; 21. First link; 22. Second link; 23. Third link; 24. T-shaped push rod; 24a. Horizontal bar; 24b. Vertical bar; 25. Support rod; 3. Leg rest; 4. Drive mechanism; 5. Backrest frame; 6. Second telescopic unit; 61. Support plate; 611. Guide rail; 611a. Arc segment; 611b. Straight segment; 612. Connecting lug; 62. Three-end connector; 63. Swing rod assembly; 63a. Swing rod; 63b. Push-pull rod; 63c. Roller. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] like Figures 1 to 10 The three-posture frame structure shown includes a seat frame 1 and a first telescopic unit 2, a leg rest 3, a drive mechanism 4, a backrest frame 5, and a second telescopic unit 6 mounted on the seat frame 1, as follows: Figure 1 As shown, this is the TV pose in the three-pose frame of this invention. In this embodiment, the first telescopic unit 2 is connected to the bottom of the seat frame 1 and can extend or retract towards the front end of the seat frame 1; here, the front end of the seat frame 1 refers to the direction in which the user's lower legs are raised after sitting on the sofa; the leg rest 3 is fixed to the end of the first telescopic unit 2, where the end refers to... Figure 1 The outer end shown; one end of the drive mechanism 4 is rotatably connected to the bottom side of the seat frame 1, and the other end is rotatably connected to the first telescopic unit 2; as shown Figure 2 The diagram shows a sitting posture in the three-posture frame of this invention. In this embodiment, the drive mechanism 4 performs a linear telescopic movement, which can be various structural forms such as an electric push rod or a gas spring. The backrest frame 5 is rotatably connected to the seat frame 1 and is located on the side away from the leg rest 3. Here, the rotatable connection refers to the bottom of the backrest frame 5 being rotatably connected to the rear of the seat frame 1 to enable the user to switch between a sitting and reclining posture. The second telescopic unit 6 is rotatably connected to the backrest frame 5 to drive the change of the angle of the backrest frame 5. It should be noted that the first telescopic unit 2 and the second telescopic unit 6 have various structural forms in the prior art and can be implemented by connecting multiple connecting rods. In the following embodiments of this invention, one specific structure will be described in detail.

[0048] In an embodiment of the present invention, the second telescopic unit 6 is rotatably connected to the first telescopic unit 2. When the drive mechanism 4 retracts to its initial state, it is in a sitting position. When the drive mechanism 4 extends, it first extends the first telescopic unit 2 outside the seat frame 1 to form a TV position, and then the first telescopic unit 2 drives the second telescopic unit 6 to change the angle of the backrest frame 5 to form a reclining position. That is, in an embodiment of the present invention, when the drive mechanism 4 extends, it first adjusts the angle of the leg rest 3 in the TV position. When the user is lying on the backrest, he / she can adjust his / her lower legs to a comfortable angle, and the angle of the buttocks and back does not need to be changed during the adjustment process. When it is necessary to lie down, the drive mechanism 4 continues to extend to recline the backrest frame 5, thereby adjusting the angle of the backrest. Through the above settings, the adjustable posture is more versatile and better adaptable to users of different body shapes.

[0049] In the above embodiment, the seat frame 1 is fixed in the three-position frame structure, and the first telescopic unit 2 and the second telescopic unit 6 drive the movement of each leg rest 3 and backrest frame 5 under the drive of the drive mechanism 4. Compared with the prior art, the structural stability of the three-position sofa is improved. Furthermore, through the linkage of the first telescopic unit 2 and the second telescopic unit 6, the TV posture can be adjusted first, and then the reclining posture can be adjusted. Compared with the prior art, the structure is simpler and can improve the user's comfort.

[0050] Based on the above embodiments, such as Figure 4 As shown, in some embodiments of the present invention, the seat frame 1 includes armrest frames 11 disposed on both sides and a seat frame 12 connected to the inner side of the two armrest frames 11. In specific connection, the seat frame 12 is connected to the two armrest frames 11 on both sides respectively. The specific connection method can be screwed or other methods. This structure facilitates processing and installation, as well as disassembly and maintenance.

[0051] To further improve the convenience of processing and manufacturing, please continue to refer to... Figure 4 In an embodiment of the present invention, the armrest frame 11 includes an armrest frame 11a and two legs 11b connected to the armrest frame 11a. The two legs 11b are arranged in parallel and are integrally formed with the armrest frame 11a. By setting the legs 11b on the armrest frame 11, the seat frame 1 is formed after the armrest frame 11 is connected to the seat frame 12, thereby improving installation efficiency. In an embodiment of the present invention, it can be done as follows: Figure 4 As shown, the armrest frame 11 is set as a door-shaped frame with a connecting rod in the middle. When it is connected to the seat frame 12, the connection is made at the connecting rod. With this structural form, the structure is simple and the structural stability of the armrest frame 11 can be guaranteed.

[0052] In some embodiments of the present invention, please refer to the specific structure of the first telescopic unit 2. Figure 5 and Figure 6 The first telescopic unit 2 includes: a first connecting rod 21, a second connecting rod 22, and a third connecting rod, wherein, as shown in the figure... Figure 5 As shown, one end of the first connecting rod 21 is rotatably connected to the leg rest 3; in specific connection, it can be directly connected to the leg rest 3 or connected by angle steel or other profiles on the leg rest 3; one end of the second connecting rod 22 is rotatably connected to the bottom of the seat frame 1, and the other end is pivotally connected to the other end of the first connecting rod 21 to form a V-shaped telescopic structure; when the V-shaped telescopic structure extends and retracts, the angles of the first connecting rod 21 and the second connecting rod 22 change, thereby changing the angle and position of the leg rest 3; one end of the third connecting rod 23 is rotatably connected to the leg rest 3, and the middle part is rotatably connected to the middle part of the second connecting rod 22, so that the first connecting rod 21, the second connecting rod 22 and the third connecting rod 23 form a quadrilateral structure, and the other end of the third connecting rod 23 protrudes outside the second connecting rod 22. With this arrangement, when the part of the third connecting rod 23 protruding outside the second connecting rod 22 is pushed, the included angle of the quadrilateral changes, so that the leg rest 3 changes from a vertical state to a horizontal state. Figure 6 The outward tilt shown in the diagram can form a TV posture; when the leg rest 3 is pushed further, the leg rest 3 is on the upper part of the seat frame 12, which can form a reclining posture structure for the legs.

[0053] Alternatively, as Figure 5 and Figure 6 As shown, the first telescopic unit 2 also includes a T-shaped push rod 24. The T-shaped push rod 24 includes a horizontal bar 24a and a vertical bar 24b connected to the horizontal bar 24a. One end of the horizontal bar 24a is rotatably connected to the bottom of the seat frame 1, and the far end of the vertical bar 24b is rotatably connected to the end of the third connecting rod 23 that protrudes from the second connecting rod 22. In this embodiment of the invention, the length of the vertical bar 24b of the T-shaped push rod 24 is greater than the length of the horizontal bar 24a, and the rotatable connection point between the horizontal bar 24a and the seat frame 1 is close to the rotatable connection point of the third connecting rod 23. Through this structural form, not only does the T-shaped push rod 24 constitute a lever structure, but it also allows the T-shaped push rod 24 to tilt and push the leg rest 3 upward from a vertical state during rotation, which is beneficial for the smooth transmission of force and reduces stress concentration. In this embodiment of the invention, the driving mechanism 4 is an electric push rod, and the driving end of the electric push rod is rotatably connected to the middle of the vertical bar 24b of the T-shaped push rod 24. The electric push rod is prior art and will not be described in detail here.

[0054] Optionally, to further improve the smoothness of force application by the drive mechanism 4, in embodiments of the present invention, such as Figure 5As shown, the first telescopic unit 2 is symmetrically arranged on both sides of the seat frame 1 in the width direction. A support rod 25 is connected between the two T-shaped push rods 24. The support rod 25 is fixed to the two vertical rods 24b. The electric push rod is rotatably connected to the middle of the support rod 25. Thus, when the electric push rod applies force, the force is first transmitted to the support rod 25. Then, the support rod 25 synchronously pushes the two T-shaped push rods 24 to rotate, so that the leg rest 3 can be flipped in a parallel state without twisting.

[0055] In some embodiments of the present invention, the specific structure of the second telescopic unit 6 is as follows: Figure 7 and Figure 8 As shown, the second telescopic unit 6 includes a support plate 61, a three-end connector 62, and a swing arm assembly 63, specifically as follows: Figure 8 As shown, the support plate 61 is fixed to the seat frame 1. In specific connection, holes can be made in the support plate 61, and it can be fixed to the seat frame 12 by screwing. In the embodiment of the present invention, the support plate 61 is vertically arranged. The first end of the three-end connector 62 is rotatably connected to the support plate 61, and the second end of the three-end connector 62 is fixedly connected to the side wall of the backrest frame 5. In the embodiment of the present invention, the three-end connector 62 has an inverted T-shaped structure. The middle vertical section is fixedly connected to the backrest frame 5. The angle of the backrest frame 5 can be adjusted by the rotational connection of the first end to the support plate 61. The angle change is driven by the swing rod assembly 63. One end of the swing rod assembly 63 is connected to the third end of the three-end connector 62, and the other end is rotatably connected to the other end of the crossbar 24a of the T-shaped push rod 24, so that the angle of the backrest frame 5 can be changed by the rotation of the T-shaped push rod 24.

[0056] Please continue to refer to Figure 8 and Figure 9 In an embodiment of the present invention, the swing arm assembly 63 includes a swing arm 63a and a push-pull rod 63b; one end of the swing arm 63a is rotatably connected to a three-end connector 62, and the other end is rotatably connected to the push-pull rod 63b, the other end of which is rotatably connected to a crossbar 24a; wherein, the support plate 61 has a guide rail 611, the swing arm 63a and the push-pull rod 63b are rotatably connected within the guide rail 611, the guide rail 611 includes an arc segment 611a and a straight segment 611b, and the swing arm 63a is configured to rotate only within the arc segment 611a during the process of the three-attitude frame structure being driven to the TV pose. Figure 9As shown, the arc-shaped segment 611a and the straight segment 611b of the guide rail 611 allow the swing rod 63a to swing and rotate within the arc-shaped segment 611a around the connection point of the three-end connector 62, thus ensuring that the TV posture adjustment process does not affect the backrest frame 5. When the TV posture adjustment is completed and the reclining posture adjustment is continued, the push-pull rod 63b pulls the swing rod 63a into the straight segment 611b, which is tilted upwards. This allows the angle at which the swing rod 63a pulls the three-end connector 62 to change, thereby changing the angle of the backrest frame 5.

[0057] In some embodiments of the present invention, such as Figure 9 As shown, the guide rail 611 is a guide groove provided on the support plate 61, and a roller 63c is rotatably connected in the guide groove. Both the swing rod 63a and the push-pull rod 63b are rotatably connected to the roller 63c. The roller 63c reduces the resistance when the swing rod 63a moves in the guide rail 611, and facilitates processing and manufacturing, reducing production costs. Furthermore, in embodiments of the present invention, as... Figure 9 As shown, the support plate 61 also has an inwardly bent connecting lug 612, such as... Figure 4 As shown, the connecting ear 612 serves two purposes: firstly, it can fix the seat frame 12; secondly, it can limit the movement of the backrest frame 5 by abutting against the side wall of the three-end connector 62.

[0058] In an embodiment of the present invention, a sofa structure is also provided, including the aforementioned three-position frame structure. During actual manufacturing, only the seat cushion, backrest, armrests, and electronic switches need to be fixed to the frame. The structure is simple, installation is convenient, and it is suitable for widespread use. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-pose frame structure, characterized in that, Including the seat frame and the components mounted on it: The first telescopic unit is connected to the bottom of the seat frame and can extend or retract toward the front end of the seat frame; Leg rests are fixed to the end of the first telescopic unit; The drive mechanism is rotatably connected at one end to the bottom side of the seat frame and rotatably connected at the other end to the first telescopic unit. The backrest frame is rotatably connected to the seat frame and is located on the side away from the leg rest. The second telescopic unit is rotatably connected to the backrest frame to drive the change of the angle of the backrest frame; The second telescopic unit is rotatably connected to the first telescopic unit. When the drive mechanism is retracted to the initial state, it is in a sitting position. When the drive mechanism is extended, the first telescopic unit is first extended outside the seat frame to form a TV position, and then the first telescopic unit drives the second telescopic unit to change the angle of the backrest frame to form a reclining position. The first telescopic unit includes: The first connecting rod is rotatably connected at one end to the leg rest plate; The second link has one end rotatably connected to the bottom of the seat frame and the other end pivotally connected to the other end of the first link to form a V-shaped telescopic structure. The third link has one end rotatably connected to the leg rest plate and the middle part rotatably connected to the middle part of the second link, so that the first link, the second link and the third link form a quadrilateral structure, and the other end of the third link protrudes out of the second link. The first telescopic unit also includes a T-shaped push rod, which includes a horizontal bar and a vertical bar connected to the horizontal bar. One end of the horizontal bar is rotatably connected to the bottom of the seat frame, and the far end of the vertical bar is rotatably connected to the end of the third connecting rod that protrudes from the second connecting rod. The driving mechanism is an electric push rod, and the driving end of the electric push rod is rotatably connected to the middle of the vertical rod of the T-shaped push rod; The second telescopic unit includes: A support plate, which is fixed to the seat frame; The three-end connector has its first end rotatably connected to the support plate and its second end fixedly connected to the side wall of the backrest frame. The swing arm assembly has one end connected to the third end of the three-end connector and the other end rotatably connected to the other end of the crossbar of the T-shaped push rod, so as to change the angle of the backrest frame by rotating the T-shaped push rod. The swing arm assembly includes a swing arm and a push-pull arm; One end of the swing rod is rotatably connected to the three-end connector, and the other end is rotatably connected to the push-pull rod. The other end of the push-pull rod is rotatably connected to the crossbar. The support plate has a guide rail, and the swing rod and push-pull rod are rotatably connected within the guide rail. The guide rail includes an arc segment and a straight segment. The swing rod is configured to rotate only within the arc segment during the process of the three-attitude frame structure being driven to the TV pose.

2. The three-pose frame structure according to claim 1, characterized in that, The seat frame includes armrest frames on both sides and a seat frame connected to the inner sides of the two armrest frames.

3. The three-pose frame structure according to claim 2, characterized in that, The handrail frame includes a handrail frame and two legs connected to the handrail frame. The two legs are arranged in parallel and are integrally formed with the handrail frame.

4. The three-pose frame structure according to claim 1, characterized in that, The first telescopic unit is symmetrically arranged on both sides of the seat frame in the width direction. A support rod is connected between the two T-shaped push rods. The support rod is fixed on the two vertical rods. The electric push rod is rotatably connected to the middle of the support rod.

5. The three-pose frame structure according to claim 1, characterized in that, The guide rail is a guide groove provided on the support plate, and a roller is rotatably connected in the guide groove. The swing rod and the push-pull rod are both rotatably connected to the roller.

6. A sofa structure, characterized in that, Includes the three-position frame structure as described in any one of claims 1 to 5.

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