Reciprocating sofa and its frame

Abstract

The present invention first provides a sofa frame unit that can move between an upright position, a TV position, and a reclining position, comprising a connecting rod assembly; a backrest support assembly, wherein the backrest support assembly is connected to the connecting rod assembly via a backrest connecting rod, and when the sofa frame unit moves from the upright position to the TV position, the connecting rod assembly drives the backrest support assembly to tilt backward; the present invention also provides a reciprocating sofa, comprising a sofa frame unit and a drive unit. Through the linkage design of the leg connecting rod, the drive connecting rod, and the backrest connecting rod, the footrest and the backrest can move relative to each other when the sofa tilts. Furthermore, because the backrest support assembly and the leg assembly are two relatively independent sets of connection methods, the leg assembly and the backrest support assembly can be moved separately, so that when the sofa moves from the upright position to the TV position, the backrest can tilt backward to a certain angle, putting the user in a relatively comfortable state.

Description

Technical Field

[0001] The present invention relates to the technical field of sofas, and in particular to a reciprocating sofa and a frame thereof. Background Art

[0002] As a primary tool for work, rest, and entertainment, sofas effectively relieve fatigue and relax the mind, making them a necessity in daily life. With global technological advancements and improved consumer quality of life, consumers are placing higher demands on health and comfort. Their demands for sofas are no longer limited to simple seating, but are now demanding higher levels of health, comfort, and functionality.

[0003] Functional sofas satisfy consumers' pursuit of sofa comfort. Compared to traditional sofas, functional sofas are ergonomically designed and rely on built-in linear actuators as their core power source. Controlled by push-button up and down buttons, the sofa's rise, fall, tilt, and flip are controlled, providing consumers with the most appropriate angle, allowing the head, neck, waist, knees, and feet to be fully relaxed. This provides full-body support, promotes blood circulation, and benefits health. These functions are achieved through an internal linear actuator system. A single-person functional sofa requires at least two linear actuators and a linear actuator system to provide power. Functional sofas fully demonstrate their comfort and health benefits in daily life. After years of development, their functionality has been continuously improved and enhanced, earning unanimous recognition from consumers.

[0004] Typically, a functional sofa can be in three reclining states: upright, TV position, and reclining. For example, U.S. Patent Publication No. US7997644B2 discloses a reclining chair with a power actuator, specifically disclosing three reclining positions: (a) upright position: In the upright position, the seat is generally horizontal, the backrest is generally vertical, and the footrest is generally vertical and located below the seat; (b) TV position: In the TV position, the footrest is generally horizontally placed in front of the seat, and the backrest and seat maintain the same relationship as in the upright position; (c) fully reclined position: In the fully reclined position, the angle between the backrest and seat is increased.

[0005] When this type of functional sofa is in the TV position, the seat and backrest remain vertical, and the user's upper and lower body are at right angles, which is not a comfortable position. Especially for relatively obese users, the vertical position of the seat and backrest will squeeze their abdomen, greatly affecting their comfort.

[0006] In view of the above problems, it is urgent to design a new type of sofa that can be used in upright, TV and lying positions so that the user can be in the most comfortable position. Summary of the Invention

[0007] The purpose of the present invention is to overcome the defects of the prior art and provide a sofa with reciprocating motion.

[0008] To achieve the above and other purposes, the present invention is implemented through the following technical solutions: First, a sofa frame unit is provided, which can be moved between an upright position, a TV position, and a lying position, and is characterized in that it includes a connecting rod assembly installed on a base assembly through a seat plate fixing member, the connecting rod assembly including a leg connecting rod, a driving connecting rod, an upper swinging link of a backrest connecting rod, and a lower swinging link, the leg connecting rod and the backrest connecting rod are respectively installed at both ends of the driving connecting rod; the lower end of the lower swinging link is fixedly installed on the rear end of the driving connection, and the upper end of the lower swinging link is rotatably connected to the lower end of the upper swinging link;

[0009] A backrest support assembly, having a first fixing hole at the front end and a second fixing hole at the rear end, wherein the first fixing hole is fixedly connected to the backrest connecting rod, and the second fixing hole is fixedly connected to the upper end of the upper swing link;

[0010] When the sofa frame moves from the upright position to the TV position, the leg connecting rod drives the driving connecting rod to move forward, driving the upper end of the backrest connecting rod 7 to push upward, the position of the second fixing hole is fixed, and the first fixing hole moves upward, pushing the front end of the backrest support assembly upward, so that the backrest support assembly as a whole tilts backward at a certain angle.

[0011] In one embodiment, when the sofa frame unit moves from the TV position to the lying position, the upper swing link and the lower swing link drive the backrest support assembly to tilt backward.

[0012] In one embodiment, a limiting groove is provided at the rear end of the seat plate fixing member.

[0013] The present invention also provides a reciprocating sofa, comprising a seat, a backrest, a footstool and armrests, wherein the seat is arranged horizontally, the backrest is mounted on the seat, the footstool is arranged below the seat, and the armrests are mounted on both sides of the seat, characterized in that the sofa comprises any one of the above-mentioned sofa frame units, and a drive unit mounted on the frame unit, wherein the drive unit drives the frame unit to move between an upright position, a TV position and a lying position;

[0014] When in the upright position, the seat is arranged horizontally, the backrest is arranged vertically on the seat, and the footrest is arranged vertically below the seat;

[0015] When moving from the upright position to the TV position, the footrest extends forward to a horizontal position and the backrest tilts backward;

[0016] When going from the TV position to the lie-flat position, the position of the footrest remains unchanged and the backrest continues to tilt backward.

[0017] In one embodiment, the front end of the driving unit is connected to the leg assembly, and the leg assembly is driven to extend by the driving unit; the rear end of the driving unit is fixedly connected to the seat plate fixing member.

[0018] In one embodiment, the sofa further comprises a reciprocating member installed below the connecting rod assembly to enable the sofa to perform reciprocating motion.

[0019] In one embodiment, two limiting posts are installed at the rear end of the lower swing link, and the two limiting posts are respectively used to limit the position of the sofa when it reciprocates between the upright position and the TV position.

[0020] In one embodiment, the driving unit is a push rod motor.

[0021] The present invention has the following beneficial effects:

[0022] The linkage design of the leg connecting rod, drive connecting rod, and backrest connecting rod enables relative movement between the footrest and backrest when the sofa tilts. Furthermore, because the backrest support assembly and leg assembly are two relatively independent connections, the leg assembly and backrest support assembly can move independently. As the sofa moves from the upright position to the TV position, the backrest can tilt backward at a certain angle, providing a relatively comfortable position for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the reciprocating sofa of the present invention.

[0024] Figure 2 Shown is a schematic structural diagram of the skeleton unit and the driving unit of the present invention.

[0025] Figure 3 Shown is a top view of the skeleton unit and drive unit of the present invention.

[0026] Figure 4 Shown is a schematic structural diagram of the skeleton unit of the present invention when in an upright position.

[0027] Figure 5 It shows a schematic structural diagram of the skeleton unit of the present invention when it is in the TV position.

[0028] Figure 6 Shown is a schematic structural diagram of the skeleton unit of the present invention when in a lying position. DETAILED DESCRIPTION

[0029] See also Figures 1 to 6 . The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0030] like Figure 1 As shown, the present invention provides a reciprocating sofa, comprising a seat 1, a backrest 2, a footstool 3 and two armrests 4. When the sofa 1 is in an upright state, the backrest 2 is relatively perpendicular to the seat 1, the backrest 2 is in an upright position, and the seat 1 is in a horizontal position; the footstool 3 is installed under the seat 1, and the footstool 3 can be controlled to extend and retract; the two armrests 4 are respectively arranged on both sides of the seat 1.

[0031] like Figure 2 As shown, a skeleton unit 5 and a driving unit 6 are installed inside the sofa. The driving unit 6 is installed on the skeleton unit 5, and the driving unit 6 can drive the skeleton unit 5 to control the sofa to tilt and switch between three different states: upright state, TV state and lying state.

[0032] The skeleton unit 5 is composed of multiple connecting components, including a base assembly 51, two sets of connecting rod assemblies 52, a backrest support assembly 53, and a leg assembly 54. Specifically, two sets of connecting rod assemblies 52 are symmetrically arranged on either side of the base assembly 51 to drive the synchronous tilt of the two sides of the sofa. The two sets of connecting rod assemblies 52 have the same structure and function. The leg assembly 54 is installed at the front end of the connecting rod assembly 52 to drive the extension and retraction of the footrest 3. The backrest support assembly 53 is installed at the rear end of the connecting rod assembly 52 to drive the tilt and retraction of the backrest 2.

[0033] Please combine Figures 3 to 6The base assembly 51 includes two first bottom mounting rods 511, two second bottom mounting rods 512 and a reciprocating member 513. The two first bottom mounting rods 511 are arranged in parallel, and the two second bottom mounting rods 512 are installed between the two first bottom mounting rods 511. The two second bottom mounting rods 512 are perpendicular to the two first bottom mounting rods 511, so that the base assembly 51 has a roughly "I"-shaped structure, so that the sofa as a whole always remains stable; the reciprocating member 513 is installed on the first bottom mounting rods 511 to make the sofa reciprocate. The reciprocating member 513 can be a sliding member, a rocking member, or other members that can make the sofa reciprocate.

[0034] In this embodiment, the reciprocating member 513 is a rocking assembly, which may include a cam 5131 and a spring group 5132. The lower surface of the cam 5131 is an arc surface, which is mounted on the first bottom mounting rod 511; the connecting rod assembly 52 is mounted on the upper surface of the cam 5131; in addition, the lower end of the spring group 5132 is mounted on the second bottom mounting rod 512, and the upper end of the spring 5132 is connected to the convex portion of the upper end of the cam 5131. Through the cooperation of the cam 5131 and the spring 5132, the connecting rod assembly 52 can perform a rocking (reciprocating) motion on the base assembly 51, thereby causing the sofa to perform a rocking (reciprocating) motion.

[0035] Please combine Figures 3 to 6The two sets of connecting rod assemblies 52 are mirror-imaged and arranged on both sides above the base assembly 51. The two sets of connecting rod assemblies 51 have the same structure, and the left connecting rod assembly is used as an example for description. The connecting rod assembly 52 includes a seat plate fixing member 521, a front support rod 522, a rear support rod 523, a seat frame mounting plate 524, a drive connecting rod 525, a leg connecting rod 526, a backrest connecting rod 527, a lower swing link 528, and an upper swing link 529. The connecting rod assembly 52 is fixedly mounted on the base assembly 51 through the seat plate fixing member 521, and the seat frame mounting plate 524 is mounted on the seat plate fixing member 521 through the front support rod 522 and the rear support rod 523, so that the seat frame mounting plate 524, the seat plate fixing member 521, the front support rod 522 and the rear support rod 523 form a roughly parallelogram; and the front support rod 522, the rear support rod 523 and the seat plate fixing member 521 and the seat frame mounting plate 524 are all rotatably connected by rivets to drive the seat frame mounting plate 524 to move forward and backward, and the middle part of the front support rod 522 and the middle part of the seat plate fixing member 521 are also connected to a resistance member 5221, which generates a certain resistance when the sofa moves from the TV position to the lying position to reduce the tilting speed of the sofa, and at the same time provides a certain pulling force when the sofa is retracted from the lying position to the TV position. Furthermore, the rear end of the seat plate fixing member 521 is provided with a limit slot 5211, which may be fan-shaped. A limit pin 5231 is installed at a position on the rear support rod 523 corresponding to the limit slot 5211. The cooperation between the limit pin 5231 and the limit slot 5211 limits the rotational state and angle of the backrest support assembly 53.

[0036] The front end of the driving connecting rod 525 is rotatably connected to the front end of the seat frame mounting plate 524 via the leg connecting rod 526, and the rear end of the driving connecting rod 525 is fixedly connected to the rear end of the seat frame mounting plate 524 via the backrest connecting rod 527. The linkage design of the leg connecting rod 526, the driving connecting rod 525, and the backrest connecting rod 527 enables relative movement between the footrest 3 and the backrest 2 when the sofa tilts. Furthermore, because the backrest support assembly 53 and the leg assembly 54 are two relatively independent sets of connections, the leg assembly 54 and the backrest support assembly 53 can move independently.

[0037] The lower swing link 528 is a movable hook-shaped member. The lower end of the lower swing link 528 is fixedly installed at the rear end of the drive connecting rod 525, and the upper end of the lower swing link 528 is rotatably connected to the upper swing link 529. The upper swing link 529 is a substantially inverted "C" - shaped member, including a first transverse member 5291 located below, a second transverse member 5292 located above, and an axial member 5293 vertically connecting the first transverse member 5291 and the second transverse member 5292. The lower end of the axial member 5293 is rotatably connected to the rear end of the first transverse member 5291, and the axial member 5293 is rotatably connected to the rear end of the second transverse member 5292. The upper end of the lower swing link 528 is rotatably installed at approximately the middle position of the first transverse member 5291. The front end of the first transverse member 5291 is rotatably connected to the seat plate fixing member 521, and the upper end of the axial member 5293 is rotatably connected to the seat frame mounting plate 524. Through the linkage design of the lower swing link 528 and the upper swing link 529, the backrest support assembly 53 is driven to tilt and rotate, so that the backrest 2 of the sofa tilts and rotates.

[0038] In addition, a first limit post 5281 and a second limit post 5282 are installed at the rear end of the lower swing link 528. The first limit post 5281 and the second limit post 5282 are respectively used for limiting the reciprocating movement of the sofa in the upright position and the TV position. Specifically, in the upright position, the first limit post 5281 is located below the second limit post 5282. When the sofa reciprocates, the first limit post 5281 first touches the upper surface of the first bottom mounting rod 511 to limit the amplitude of the reciprocating movement of the sofa. Similarly, in the TV position, the second limit post 5282 is located below the first limit post 5281. When the sofa reciprocates, the second limit post 5282 first touches the upper surface of the first bottom mounting rod 511 to limit the amplitude of the reciprocating movement of the sofa.

[0039] The backrest support assembly 53 is substantially "L" - shaped, including a first fixing hole 531 and a second fixing hole 532. The first fixing hole 531 and the second fixing hole 532 are distributed front and back. The backrest assembly 53 is fixedly connected to the backrest connecting rod 527 through the first fixing hole 531, and the backrest assembly 53 is fixedly connected to the front end of the second axial member 5292 through the second fixing hole 532. Through the design of the first fixing hole 531 and the second fixing hole 532, the backrest support assembly 53 can be driven to perform two - stage tilting rotations.

[0040] The leg assembly 54 includes a first upper leg link 541, a second upper leg link 542, a first lower leg link 543, a second lower leg link 544 and a first footrest bracket 545. The rear end of the first upper leg link 541 is rotatably mounted on the front end of the seat frame mounting plate 524, the front end of the first upper leg link 541 is connected to the rear end of the second upper leg link 542, the front end of the second upper leg link 542 is rotatably mounted on the footrest bracket 545, and in addition, a second footrest bracket 546 is also installed in the middle of the second upper leg link 542. The rear end of the first lower leg connecting rod 543 is rotatably connected to the second leg connecting rod 526, the front end of the first lower leg connecting rod 543 is rotatably connected to the rear end of the second lower leg connecting rod 544, the front end of the second leg connecting rod 544 is rotatably connected to the first footrest bracket 545, and the second lower leg connecting rod 544 is rotatably connected to the first upper leg connecting rod 541 via rivets, and the second lower leg connecting rod 544 is rotatably connected to the second footrest bracket 546. Through the linkage design of the first upper leg connecting rod 541, the second upper leg connecting rod 542, the first lower leg connecting rod 543, and the second lower leg connecting rod 544, the footrest 3 extends forward and upward when the sofa is tilted.

[0041] The drive unit 6 is mounted on the frame unit 5 and is used to drive the frame unit 5 to move accordingly, thereby switching the sofa between the three different states: upright state, TV state, and reclining state. The drive unit 6 is generally H-shaped and is installed between the two sets of connecting rod assemblies 52. Specifically, the drive unit 6 includes a front mounting rod 61, a rear mounting rod 62, and a driving member 63. The front mounting rod 61 is mounted on the front end of the driving member 63, and the rear mounting rod 62 is mounted on the rear end of the driving member 63. The driving member 63 can drive the front mounting rod 61 or the rear mounting rod 62 to move.

[0042] The two ends of the front mounting rod 61 are respectively fixedly connected to the first lower leg connecting rods 543 on both sides. Preferably, the two ends of the front mounting rod 61 can be fixedly mounted at the rear ends of the first lower leg connecting rods 543 on both sides. The two ends of the rear mounting rod 62 are respectively fixedly connected to the seat panel fixing members 521 on both sides. Preferably, the two ends of the rear mounting rod 62 can be fixedly mounted at the rear ends of the seat panel fixing members 521 on both sides. The driving member 63 can drive the front mounting rod 61 or the rear mounting rod 62 to move, thereby causing the leg connecting rod 526 and the backrest connecting rod 527 to extend and retract, thereby enabling the sofa to switch between three different states: upright state, TV state, and reclining state.

[0043] Preferably, in this embodiment, the driving member 63 may be a push rod motor, comprising a motor body 631, a sleeve 632, and a push rod 633. The motor body 611 is fixedly mounted on the middle portion of the rear mounting rod 62, and the front end of the push rod 632 is fixedly connected to the middle portion of the front mounting rod 61. The sleeve 632 is sleeved around the outer circumference of the push rod 633, and the rear end of the sleeve 632 is fixedly connected to the motor body 631. Driven by the motor body 631, the push rod 633 performs telescopic movement within the sleeve 632. Since the front end of the push rod 633 is fixedly connected to the front mounting rod 61, and the front mounting rod 61 is mounted on the first lower leg link 543, the push rod 633 can drive the leg assembly 544 to extend and retract during telescoping.

[0044] Please combine again Figure 4 and Figure 5 When the user controls the driving unit 6 to move the sofa from Figure 4 Upright position shown tilted to Figure 5 When the TV position is shown, the driving member 63 first pushes the front mounting rod 61 to move forward, and the front mounting rod 61 drives the first lower leg link 543 to extend forward. Due to the linkage and pivotal connection between the first lower leg link 543, the second lower leg connecting rod 544, the first upper leg link 541 and the second upper leg link 542, the second lower leg connecting rod 543, the first upper leg link 541 and the second upper leg link 542 can all extend forward along with the first lower leg link 543 until the leg assembly 54 is completely extended. When the backrest reaches the limit position, the driving connecting rod 525 connected to the leg connecting rod 526 is driven to move forward, causing the lower end of the backrest connecting rod 527 fixed to the rear end of the driving connecting rod 525 to move forward, thereby pushing the upper end of the backrest connecting rod 527 upward. Since the backrest connecting rod 527 is fixedly connected to the first fixing hole 531 at the front end of the backrest support assembly 53, the upward push of the backrest connecting rod 527 causes the front end of the backrest support assembly 53 to move upward, thereby tilting the entire backrest support assembly 53 backward by a certain angle. This completes the tilting movement of the sofa from the upright position to the TV position.

[0045] Please combine again Figure 5 and Figure 6 When the user controls the driving unit 6 to move the sofa from Figure 5 The TV position shown is tilted to Figure 6When in the shown lying position, continue to drive the driving member 63 forward, and the front mounting rod 61 moves forward. Since the leg assembly 54 no longer extends forward, at this time, the front mounting rod 61 drives the seat frame mounting plate 524 to move upward and forward as a whole through the leg connecting rod 526. The seat frame mounting plate 524 drives the upper ends of the front support rod 522 and the rear support rod 523 to move forward and upward simultaneously, so that the seat plate fixing member 521 mounted at the lower ends of the front support rod 522 and the rear support rod 523 moves backward and downward as a whole, and through the inverted "C"-shaped upper swing link 529, the second fixing hole 532 at the upper rear end of the backrest support assembly 53 moves downward, so that the backrest support assembly 53 tilts backward at a certain angle again. When the limit pin 5231 on the support rod 523 moves to the upper limit edge of the limit groove 5211 on the seat plate fixing member 521, the tilting stops, thus completing the tilting movement of the sofa from the TV state to the lying state.

[0046] Of course, the user can make the sofa return from the lying position to the TV position, and return from the TV position to the upright position by driving the driving member 63 to contract reversely.

[0047] The above embodiments are only a specific embodiment proposed by the present invention to show the advantages and functions of the present invention. Those skilled in the art can realize that in combination with the present invention, the sofa can be modified in other ways. For example, the driving unit 6 can be in other driving forms, such as a slider motor or other forms of motors, etc., or the push rod 633 of the push rod motor can also be installed reversely, etc.

[0048] The above content is an explanation of the present invention and should not be construed as a limitation of the present invention. Although the exemplary embodiments of the present invention have been described, those skilled in the art will easily recognize that modifications to the embodiments are also within the scope of the present invention without substantially departing from the creative guidance and advantages of the present invention.

Claims

1. A sofa frame unit capable of moving between an upright position, a TV position and a lying position, characterized in that: include A connecting rod assembly is mounted on the base assembly via a seat plate fixing member, the connecting rod assembly comprising a leg connecting rod, a driving connecting rod, a backrest connecting rod, an upper swing connecting rod and a lower swing connecting rod, the leg connecting rod and the backrest connecting rod being mounted on both ends of the driving connecting rod respectively; the lower end of the lower swing connecting rod is fixedly mounted on the rear end of the driving connecting rod, and the upper end of the lower swing connecting rod is rotatably connected to the lower end of the upper swing connecting rod; A backrest support assembly, having a first fixing hole at the front end and a second fixing hole at the rear end, wherein the first fixing hole is fixedly connected to the backrest connecting rod, and the second fixing hole is fixedly connected to the upper end of the upper swing link; When the sofa frame unit moves from the upright position to the TV position, the leg connecting rod drives the driving connecting rod to move forward, driving the upper end of the backrest connecting rod to push upward, the position of the second fixing hole is fixed, and the first fixing hole moves upward, pushing the front end of the backrest support assembly to move upward, so that the backrest support assembly as a whole tilts backward at a certain angle.

2. A sofa frame unit according to claim 1, characterized in that: When the sofa frame unit moves from the TV position to the lying position, the upper swing link and the lower swing link drive the backrest support assembly to tilt backward.

3. A sofa frame unit according to claim 2, characterized in that: A limiting groove is provided at the rear end of the seat plate fixing piece.

4. A reciprocating sofa comprising a seat, a backrest, a footstool and armrests, wherein the seat is arranged horizontally, the backrest is mounted on the seat, the footstool is arranged below the seat, and the armrests are mounted on both sides of the seat, characterized in that: The sofa frame unit comprises the sofa frame unit according to any one of claims 1 to 3, and a driving unit mounted on the frame unit, the driving unit driving the frame unit to move between an upright position, a TV position and a lying position; When in the upright position, the seat is arranged horizontally, the backrest is arranged vertically on the seat, and the footrest is arranged vertically below the seat; When moving from the upright position to the TV position, the footrest extends forward to a horizontal position and the backrest tilts backward; When going from the TV position to the lie-flat position, the position of the footrest remains unchanged and the backrest continues to tilt backward.

5. The reciprocating sofa according to claim 4, characterized in that: The front end of the driving unit is connected to the leg assembly, and the leg assembly is driven to extend by the driving unit; the rear end of the driving unit is fixedly connected to the seat plate fixing piece.

6. The reciprocating sofa according to claim 5, characterized in that: The sofa further includes a reciprocating member installed below the connecting rod assembly to enable the sofa to perform reciprocating motion.

7. The reciprocating sofa according to claim 6, characterized in that: Two limiting posts are installed at the rear end of the lower swing link, and the two limiting posts are respectively used for limiting the position of the sofa when it reciprocates between the upright position and the TV position.

8. The reciprocating sofa according to claim 7, characterized in that: The driving unit is a push rod motor.

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